Smartphone Speech Essay Example for Free

Smartph nonp beil Speech EssayThe prototypic ever smartphone IBM Simon smartphone? A high-end mobile phone earn on a mobile computing platform, with more(prenominal) advanced computing ability and connectivity than a character phone. The first smartphones were devices that mainly combined the functions of a ain digital assistant (PDA) and a mobile phone or camera phone. Todays models alike serve to combine the functions of portable media players, low-end compact digital cameras, pocket picture cameras, and GPS navigation units.Modern smartphones typically also include high-resolution touchscreens, web browsers that can access and properly display standard web pages rather than on the nose mobile-optimized sites, and high-speed data access via Wi-Fi and mobile broadband. The most common mobile operating systems (OS) mathematical functiond by modern smartphones include Apples iOS, Googles Android, Microsofts Windows name, Nokias Symbian, RIMs BlackBerry OS, and embedded Linux distributions such(prenominal) as Maemo and MeeGo. Such operating systems can be installed on many different phone models, and typically each device can receive duplex OS software updates over its lifetime.The distinction mingled with smartphones and feature phones can be vague and there is no official definition for what constitutes the difference between them. One of the most significant differences is that the advanced application programming interfaces (APIs) on smartphones for running third-party applications can allow those applications to have better integration with the phones OS and computer hardware than is typical with feature phones. In comparison, feature phones more commonly run on proprietary firmware, with third-party software support through platforms such as deep brown ME or BREW.An additional complication in distinguishing between smartphones and feature phones is that over time the capabilities of new models of feature phones can increase to exceed tho se of phones that had been promoted as smartphones in the past. History Early age It was designed in 1992 and collectionn as a construct product that form at COMDEX, the computer industry trade show held in Las Vegas, Nevada. It was released to the public in 1993 and sold by BellSouth. Besides being a mobile phone, it also contained a calendar, address book, world clock, calculator, note pad, email client, the ability to send and receive faxes, and games.It had no physical buttons, instead customers used a touchscreen to select telephone numbers with a finger or create faxes and memos with an optional stylus. Text was entered with a unique on-screen predictive keyboard. By todays standards, the Simon would be a fairly low-end product, lacking a camera and the ability to download third-party applications. However, its feature set at the time was highly advanced. The Nokia Communicator line was the first of Nokias smartphones starting with the Nokia 9000, released in 1996.This dis tinctive palmtop computer style smartphone was the result of a collaborative drift of an early successful and costly personal digital assistant (PDA) by Hewlett-Packard combined with Nokias best-selling phone around that time, and early prototype models had the two devices situated via a hinge. The Communicators are characterized by a clamshell design, with a feature phone display, keyboard and user interface on top of the phone, and a physical QWERTY keyboard, high-resolution display of at least 640? 200 pixels and PDA user interface under the flip-top.The software was based on the GEOS V3. 0 operating system, featuring email talk and text-based web browsing. In 1998, it was followed by Nokia 9110, and in 2000 by Nokia 9110i, with improved web browsing capability. In 1997 the term smartphone was used for the first time when Ericsson unveiled the concept phone GS88 the first device labeled as smartphone. Symbian The Nokia 9210 Communicator (Symbian 2000 model smartphone)In 2000, the touchscreen Ericsson R380 Smartphone was released. It was the first device to use an heart-to-heart operating system, the Symbian OS.It was the first device marketed as a smartphone. It combined the functions of a mobile phone and a personal digital assistant (PDA). In December 1999 the magazine Popular Science appointed the Ericsson R380 Smartphone to one of the most important advances in science and technology. It was a groundbreaking device since it was as small and light as a normal mobile phone. In 2002 it was followed up by P800. Also in 2000, the Nokia 9210 communicator was introduced, which was the first color screen model from the Nokia Communicator line.It was a true smartphone with an open operating system, the Symbian OS. It was followed by the 9500 Communicator, which also was Nokias first cameraphone and first Wi-Fi phone. The 9300 Communicator was smaller, and the latest E90 Communicator includes GPS. The Nokia Communicator model is remarkable for also having bee n the most costly phone model sold by a major(ip) brand for close to the full life of the model series, costing easily 20% and sometimes 40% more than the next most expensive smartphone by any major producer.In 2007 Nokia launched the Nokia N95 which integrated a wide range of multimedia features into a consumer-oriented smartphone GPS, a 5 megapixel camera with autofocus and LED flash, 3G and Wi-Fi connectivity and TV-out. In the next few years these features would become standard on high-end smartphones. The Nokia 6110 Navigator is a Symbian based dedicated GPS phone introduced in June 2007. In 2010 Nokia released the Nokia N8 smartphone with a stylus-free capacitive touchscreen, the first device to use the new Symbian3 OS. 16It featured a 12 megapixel camera with Xenon flash able to record HD video in 720p, escribed by Mobile burn up as the best camera in a phone,17 and satellite navigation that Mobile Choice described as the best on any phone. 18 It also featured a front-facin g VGA camera for videoconferencing. Symbian was the number one smartphone platform by market share from 1996 until 2011 when it dropped to second place behind Googles Android OS. In February 2011, Nokia denote that it would replace Symbian with Windows Phone as the operating system on all of its future smartphones. 19 This transition was completed in October 2011, when Nokia announced its first line of Windows Phone 7. 5 smartphones, Lumia 710 and 800.Smartphone market share For several years, demand for advanced mobile devices boasting powerful processors and graphics processing units, abundant storage (flash memory) for applications and media files, high-resolution screens with multi-touch capability, and open operating systems has outpaced the rest of the mobile phone market. According to an early 2010 study by ComScore, over 45. 5 million people in the United States possess smartphones out of 234 million total subscribers. Despite the large increase in smartphone gross revenue in the last few years, smartphone shipments only made up 20% of total handset shipments as of the first half of 2010.According to Gartner in their report dated November 2010, total smartphone sales doubled in one year and now smartphones represent 19. 3 per centum of total mobile phone sales. Smartphone sales increased in 2010 by 72. 1 percent from the prior year, whereas sales for all mobile phones only increased by 32%. According to an Olswang report in early 2011, the rate of smartphone adoption is accelerating as of March 2011 22% of UK consumers had a smartphone, with this percentage rising to 31% amongst 24- to 35-year-olds. In March 2011, Berg Insight reported data that showed global smartphone shipments increased 74% from 2009 to 2010.A panorama of mobile users in the United States by Nielsen in Q3, 2011 reports that smartphone ownership has reached 43% of all U. S. mobile subscribers, with the vast majority of users under the age of 44 owning one. In the 25-34 age range smartphone ownership is reported to be at 62%. NPD Group reports that the share of handset sales that were smartphones in Q3, 2011 reached 59% for consumers 18 and over in the U. S. In earn share worldwide smartphones now far exceed the share of non-smartphones.According to a November 2011 research note from Canaccord Genuity, Apple Inc. olds 52% of the total mobile industrys operating profits, while only holding 4. 2% of the global handset market. HTC and RIM similarly only make smartphones and their worldwide profit shares are at 9% and 7%, respectively. Samsung, in second place after Apple at 29%, makes both smartphones and feature phones and doesnt report a breakdown separating their profits between the two kinds of devices, but it can be intuited that a significant portion of that profit comes from their flagship smartphone devices. Up to the end of November 2011, camera-equipped smartphones took 27 percent of photos, a significant increase from 17 percent last year.Due to the fact that we carry smartphones with us all the time, smartphones have replaced some functions of Point-and-shoot cameras, except the cameras with titanic optical zoom such as 10x. In early July 2011 the Pew Research Center released the results of a new study. The findings show that 35% of adults own smartphones, and those phones are the main source of Internet access for 25% of their users. The trends and adoption rates continue to climb and mobile devices and connections become a bigger part of the lives of more and more people.

To live a purposeful life, you need a clear VISION Essay Example for Free

To cognise a purposeful life, you need a clear VISION EssayIf you live each day as if it was your last, someday youll sure as shooting be right (Steve Jobs) If today was my last day in my life, would I do what I am about to do today? If the answer is NO for too many long time in a row, I know I need to change something. All external expectation, fear, pride, embarrassment and almost everything travel away in the casing of the ending of a life, leaving what is truly important No ane wants to die,but even if I lived, I live as if this life is a gift lent to me, which I shall someday exchange for another purer lifeDo not shrink your inner portion at the altar of others noise and false reportssomewhere in your heart, immortal has placed a treasure which only you posterior dig out and earn from. To dig this treasure will take you a while. You will have to plan to know exactly what it is, and exactly where it is. Youll have to have the right mob by your side. This treasure, planning, journey and digging is what I am calling VISIONVision is not only the power to see, but also of foresight and imagination. fifty-fifty the visually impaired have this powerthe ability to see and comprehend beyond what their brains could interpret as optical data. Human beings have the ability to sympathize words and instructions imaginatively. We are able to draw mental pictures more clearly than we can even draw on paper or explain verbally. The greatest gift is not the ability to see, but this ability of vision. God put dreams where we cannot miss them. Because of vision, I am the best raw material to myself.A vision is a supernatural appearance, which only a supernatural ability can make comprehendible and tangible.Where there is no vision, people perishProv 2918My people perish because of lack of friendshipHosea 46 Now to Him who is able to do immeasurably more than we ask or believe according to His power that is at unravel within usEphesians 320 Prov 17 and 91 0The fear of the Lord is the startle of knowledge/ wisdom. Habakkuk 22write the vision downthough it tarrys, it shall come to pass Do not despise the days of your subdue beginningsJob 87VISION PART IIBy Dominic KhaembaFrom The Ageless Note-bookTeach me oh Lord to number my days that I may off a heart of wisdom and lead a fulfilling life to you, myself, family and friendsPsalms 9012This section will make a stronger connection if you sympathize it as a follow-up to part I.You can never remember what you never knew, and you can never apply what you cannot remember. As the world changes and perfects the struggles and the suffering that we face as the world changes and justifies the insignificance of individual strength by being too complicated and fast many people find themselves feeling impatient, hopeless and poor When this happens, you need a reminder that you are still on a journey, and that your best days are ahead.But you cannot tell if youre your best days are ahead if you h ave nothing to look forward to. This is where a vision for your life comes in as the ability to anticipate future events, move them and believe in them as if they were real.Also, you will need a reminder of what your future plans arebut since you cannot remember what you never knew, you therefore come cover to Knowledgeas a clear awareness and information gained through devoted study and Experience. This knowledge is what you shall apply in preparing for your future and this preparedness is what keeps us from despairing too quickly when overwhelmed by circumstances near us.Our creative imagination also plays a big part in determining how far-off God chooses to bless us. If we do not use this faculty to envision better lives for ourselves in the future, we limit God in terms of how much He also decides to bestow on us. Eph 320.Knowledge does two important things. It distinguishes us from fools and it is a sure preservative of our lives. But the knowledge acquired in the boundaries of Gods instruction is the one that is able to do this. Otherwise, this knowledge is uselessand can quickly turn our hearts into pride.Pride goes before a fall. From the verses above, without knowledge and vision, we perish. Without creative imagination, we receive little from God. It is only in the fear of the Lord that our knowledge can begin to yield better lives for us and the people around us.Living as you move towards your dreams is a life full of joy and peace in dimensions and depths one can never experience otherwise. With a maven of calling,MY VISION IS ENLARGED THROUGH IMAGINATION and this way, I wont MIND THE SMALL SACRIFICES that I have to make as part of the journey. person-to-person inventoryA personal inventory is a way to store up our vision. Habakkuk 22 says write the vision down. Though it tarrys, it shall for sure come to pass. Write it so that whoever reads it may run with it/ facilitate your attaining of that vision.Keep a personal inventory in a journal. Th is is among the questions you may ask yourself as you do so. 1.What is my calling?The thing is to find ideas which allow me to power all my experiences, gifts and talents, all my wisdom and knowledge A calling is a duty to whichone attaches special importance and devotes special care. It must be strong enough to allow me to combinea)Talent harnessed by disciplineb)Passion paired with hard workc)Love united with commitmentd)Consistency which wipes away complacencyIf you are leaving your calling, you exude an enjoyment and connection to the gifts that transcends the recognition, fame and fortune you may receive for expressing those talents. If you find the thing which you can do for free, simply for the fulfillment of doing it, you have found your calling.

Dents Disease: Symptoms, Genetics, and Treatments

Dents Disease Symptoms, Genetics, and TreatmentsDents DiseaseAlessander Leyendecker Juniorclinical AspectsDents unhealthiness is a recently characterized syndrome caused by a genetic mutation that leads to a nephritic tubular infirmity and is characterized by manifestations of proximal tubule disfunction. The proximal tubule is responsable for the reabsorption of sodium, potassium, calcium, glucose and low-molecular-weight proteins (like retinol binding protein and 1 microglobulin and 2 microglobulin) and for the secretion of ammonia, toxins, drugs and H+. Therefore, a proximal tubule dysfunction like Dents infirmity is characterized by low-molecular-weight proteinuria (excretion of low-molecular-weight proteins in the urine), hypercalcinuria (high concentration of calcium in the urine), nephocalcinosis (deposition of calcium salts in the renal pargonnchyma), nephrolithiasis (formation of crystalline aggregates that backside develop anywhere along the urinary tract) and progres sive renal failure. Low-molecular-weight proteinuria represents the or so common symptom of Dents disorder (Devuyst Thakker, 2010).MappingA higher affection severity in males and a omit of male to male transmission were identified by an analysis of 5 unre riped British families. The fact that females whitethorn show a milder phenotype suggests an X-linked recessive inheritance. The locus position on chromossome Xp11 was identified by linkage analysis of 2 3-generation families with Dent disease by Pook et al. (1993). twenty dollar bill X-linked polymorphic markers were used and the Linkage was established between Dents disease and the Xp1l 1 loci ARAFI (Z max = 5.42, 0 = 0.000), DXS426 (Z max = 3.61, 0 = 0.000), DXS255 (Z max = 5.48, 6 = 0.000) and DXS988 (Z max = 4.25, 0 = 0.045) to determine a locus order. In addition, DXS255 has presented a microdeletion in the affected members of one family, allowing the localization of Dents disease to Xp11.22 (Pook et al., 1993). Furtherm ore, another proximal renal tubular disorder associated with nephrolithiasis in a North Ameri finish family and referred to as X-linked recessive nephrolithiasis has also been mapped to Xpl1.22. Suggesting that maybe there is one gene causing both X-linked recessive nephrolithiasis and Dents disease.Molecular GeneticsA study conducted by Fisher et al (1994) found a microdeletion in one Dents disease kindred, allowing the identification of the gene CLCN5 as a candidate. Furthermore, an investigation of 11 kindreds with renal tube disorders indentified 3 nonsense, 4 missense, 2 donor splice rate mutations, 1 intragenic deletion and 1 microdeletion in CLCN5 gene (Llyod et al., 1996).Furthermore, Hoopes et al. (2005) indentified that some patients with Dents disease suffer from extra-renal symptoms such as cataract, mild keen impairment and hypotonia. Shared mutations in OCRL1 with the oculo-cerebrorenal syndrome of Lowe were identified in these patients. The presence of such extra-re nal symptoms with mutations relating to Lowe syndrome is known as Dent disease 2.A research conducted by Bkenkamp et al. (2009) showed that low-molecular-weight proteinuria was a never-ending feature in all both Dent disease 1, Dent disease 2 and oculo-cerebrorenal syndrome of Lowe. However, there was a wide overlap in most of the other symptoms of the proximal tubulopathy. Nephrocalcinosis was discover more frequently in patients with Dents disease 1 than those with Dents disease 2 and Lowe syndrome aminoaciduria, renal tubular acidosis, and renal failure was observed more frequently in patients with Lowe syndrome than patients with Dent-disease 1 and Dent disease disease 2.GeneticsAll these findings have demonstrated that both Dent disease 1 and Dent disease 2 are a X-linked recessive inherited condition, caused by mutations in the OCRL1 (Dent disease 2) or CLCN5 (Dent disease 1) genes. These genes are located on chromosome Xp11.22 (Dent disease 1) and Xq25 (Dent disease 2).Muta tion in CLCN5 are responsible for virtually 60% of the cases of Dent disease and mutation in OCRL are responsible for about 15% of the cases of Dent disease (Hoopes et al., 2004). So, n advance(prenominal) 25% of the cases of Dent disease do not have a known disease-causing mutation in OCRL or CLCN5, implying another genetic heterogeneity.Due to the fact that Dents disease is a X-linked recessive disorder, the disease is generally found in males only. Females carriers may show a milder phenotype. Furthermore, the disease may be present in early childhood (Devuyst Thakker, 2010).To date around 250 families with Dent-1 disease and about 50 patients with Dent-2 disease have been reported (Ludwig, Levtchenko Bkenkamp, 2014). The diagnosis of Dents disease is always difficult due to the wide variability of clinical presentation and, occasionally, lack of family history. Therefore, the disorder is likely underdiagnosed and the prevalence of this disease in the population is still unkno wn.More than 200 Dents disease 1 patients withCLCN5defects have been described with several different disease-causing mutations all over the gene. The types of mutations includes missense (44%) and nonsense (26%) mutations, small deletions/insertions (15%) and splice defects (11%), with a few hotspots, usually affecting arginine codons. Large insertions/deletions can be detected in around 4%of the patients. However, OCRLmutations in Dents disease 2 patients are not uniformly distributed. Missense mutations are usually found in exons 815 while nonsense or frameshift mutations very often affect exons (Ludwig, Levtchenko Bkenkamp, 2014). CLCN5 encodes the electrogenic Cl/H+ alterr ClC-5. OCRL1 encodes a phosphatidylinositol bisphosphate (PIP) 5-phosphatase and mutations are also linked to the Lowe Syndrome. Mutations in any of these genes can culminate in the lack or dysfunction of these important proteins and result in the phenothype of Dents disease.PathophysiologyThe ability to re absorb low-molecular-weight proteins and albumin that are ultrafiltered by the glomerulus are characteristics of the epithelial cells covering the proximal tubule portions of the nephron. This ability involves a bear upon called receptor-mediated endocytosis. In the receptor-mediated endocytosis the particle to be endocytosed binds to specific receptor proteins concentrated at certain locations in the plasma membrane. Several types of receptors participate in the receptor-mediated endocytosis. These sites form a small depression in the plasma membrane that is covered by clathrin (a type of fibrous protein). After the binding of a ligand to plasma membrane-spanning receptors, a polarity is sent through the membrane, leading to membrane coating, accumulation of the ligands into coated pits, and formation of a membrane invagination. The receptor and its ligand are then opsonized in clathrin-coated cysts. The clathrin confers stability to the vesicle that are being transported into t he cell. In the cytoplasm the vesicle loses its clathrin coverage and individual vesicles fuse to early endosomes. The acidification of endosomes by proton pumps ATP-dependent leads to the dissociation of the protein-receptor complex. This process allows the endosomes to fuse with the lysosomes through late endosomes. This acidification is reached by ATP-mediated transport of cytosolic H+ through the V-ATPase and demand an equal Cl conductance to preserve electroneutrality. It has been theorized that the H+ gradient can be neutralized by the C1C-5 action. In theory, ClC-5 provides an electrical shunt to neutralize the H+ gradient. Therefore, the vesicular acidification should be impaired by the loss of the endosomal Cl conductance mediated by ClC-5, resulting in the dysfunction of proximal tubule cells. To confirm this hypothesis, Piwon et al. (2000) created twain distinct strains of ClC-5 knock-out (KO) mice which both have symptoms of the main characteristics of Dents disease inc luding manifestations of proximal tubule dysfunction like low-molecular-weight proteinuria. A reduced acidification of early endosomes in ClC-5-deficient mice have been demonstrated by in vitro experiments. However, ClC-5 is a 2Cl/H+ permuter and not just a Cl stockpile, so the importance of this exchange activity for Dents disease was still unknown and needed to be assessed. In order to investigate this relevant question, Novarino et al. (2010) created a knock-in (KI) mouse presenting a point mutation in a important glutamate residue which transforms the exchanger into an uncoupled Cl channel that should help the endosomal acidification. The conventional ClC-5 KO mouse was afterward compared with the KI mice. Acidification of the renal endosomes from wild-type and KI mice was regular, but greatly impaired in KO mice. Nevertheless, the same symptoms were indentified in both KI and KO mice, despite shape endosomal acidification and patients with Dents disease, including low-molec ular-weight proteinuria, hypercalciuria and hyperphosphaturia. Moreover, both the KI and KO mouse presented impaired proximal tubule endocytosis, indicating that proximal tubule dysfunction in Dents disease may happen in spite of the regular acidification of the endosomes. These findings indicate a function for a diminished endosomal Cl accumulation in Dents disease.DiagnosisThe clinical diagnosis of Dents disease is grounded on the presence of low-molecular-weight proteinuria, hypercalciuria, and at least one of the following characteristics kidney stones, hematuria, nephrocalcinosis, renal insufficiency or hypophosphataemia (Hoopes et al., 2004). The clinical diagnosis can also be supported by nephrolithiasis and/or history of X-linked inheritance of renal Fanconi syndrome. The diagnosis can be confirmed by the recognition of mutation in both CLCN5 or OCRL1 by sequence analysis. Sequence analysis of affected males allows the identification of whole-gene deletions, multiexonic and exonic due to the lack of amplification is this case. Confirmation may also require deletion/duplication studies. It is imperative to previously identify the disease-causing mutation in the family when conducting a carrier campaign for at-risk relatives. The diagnosis of Dent disease 2, related with OCRL1 mutations, is more common than a diagnosis of Lowe syndrome when there are an absence of clinical symptoms and lack of severe intellectual deficit.TreatmentThe reduction of hypercalciuria, prevention of nephrocalcinosis and kidney stones, and retardate the evolution of chronic kidney disease (nephrolithiasis) are the objectives of the current treatment. Thiazide diuretics in doses higher than 0.4 mg/kg/day have reducted urinary calcium excretion by more than 40% in males with Dent disease (Raja et al., 2002). However, side effects like hypokalemia, volume depletion, and cramping often occur. Similarly, we need to be cautious due to the fact that an increased hypercalciuria can res ult from the treatment of rickets with vitamin D. Furthermore, recent studies has been shown that a high citrate diet can slow the progression of chronic kidney disease in CLCN5 knockout mice (Cebotaru et al., 2005) and can be efficiently used to treat Dent disease.Genetic CounselingThe two types of Dents disease are X-linked. Therefore, men are affected more harshly. The father of an affected man will not have the disease or will he be a carrier of the mutation. The probability of transmitting the disease allele in each pregnancy is 50% if the develop of the proband is a carrier. Males who inherit the mutation will be affected and females who inherit the mutation will be carriers and will generally not be powerfully affected. Affected men pass the disease-causing mutation to all of their daughters (who become carriers) and none of their sons. It is possible to conduct carrier testing for at-risk female relatives and prenatal testing for pregnancies at increased.Word count 1673Refe rencesBlanchard A, Vargas-Poussou R, Peyrard S, Mogenet A, Baudouin V, Boudailliez B, Charbit M, Deschesnes G, Ezzhair N, Loirat C, Macher MA, Niaudet P, Azizi M Effect of hydrochlorothiazide on urinary calcium excretion in Dent disease an uncontrolled trial. Am J Kidney Dis 2008, 521084-1095.Bkenkamp A, Bckenhauer D, Cheong HI, Hoppe B, Tasic V, Unwin R, Ludwig M. (2009). Dent-2 disease A mild variant of Lowe Syndrome. J. Pediatr, 155, pp. 94-99, ISSN 0022-3476Cebotaru V, Kaul S, Devuyst O, Cai H, Racusen L, Guggino WB, Guggino SE High citrate diet delays progression of renal insufficiency in the ClC-5 knockout mouse model of Dents disease. Kidney Int 2005, 68642-652.Devuyst, O., Thakker, R. V. (2010). Dents disease. Orphanet Journal of Rare Diseases.Fisher, S. E., Black, G. C., Lloyd, S. E., Hatchwell, E., Wrong, O., Thakker, R. V., Craig, I. W. (1994). Isolation and partial characterization of a chloride channel gene which is expressed in kidney and is a candidate for Dents dis ease (an X-linked hereditary nephrolithiasis). Human molecular genetics, 3(11), 2053-2060.Hara-Chikuma M, Wang Y, Guggino SE, Guggino WB, Verkman AS Impaired acidification in early endosomes of ClC-5 deficient proximal tubule. Biochem Biophys Res Commun 2005, 329941-946.Hoopes, R. R., Raja, K. M., Koich, A., Hueber, P., Reid, R., Knohl, S. J., Scheinman, S. J. (2004). Evidence for genetic heterogeneity in Dents disease.Kidney international,65(5), 1615-1620.Hoopes RR Jr, Shrimpton AE, Knohl SJ, Hueber P, Hoppe B, Matyus J, Simckes A, Tasic V, Toenshoff B, Suchy SF, Nussbaum RL, Scheinman SJ. Dent Disease with mutations in OCRL1. Am J Hum Genet. 200576260267. doi 10.1086/427887.Ludwig, M., Levtchenko, E., Bkenkamp, A. (2014). Clinical utility gene card for Dent disease (Dent-1 and Dent-2).European Journal of Human Genetics.Lloyd, S. E., Pearce, S. H., Fisher, S. E., Steinmeyer, K., Schwappach, B., Scheinman, S. J., Thakker, R. V. (1996). A common molecular basis for three inherite d kidney stone diseases. Nature, 379(6564), 445-449.Novarino G, Weinert S, Rickheit G, Jentsch TJ Endosomal chloride-proton exchange rather than chloride conductance is crucial for renal endocytosis. Science 2010, 3281398-1401.Pagon, R. A., Adam, M. P., Bird, T. D., Dolan, C. R., Fong, C. T., Stephens, K., Rossetti, S. (2012). Dent Disease.Piwon N, Gunther W, Schwake M, Bsl MR, Jentsch TJ ClC-5 Cl-channel disruption impairs endocytosis in a mouse model for Dents disease. Nature 2000, 408369-373.Pook, M. A., Wrong, O., Wooding, C., Norden, A. G. W., Feest, T. G., Thakker, R. V. Dents disease, a renal Fanconi syndrome with nephrocalcinosis and kidney stones, is associated with a microdeletion involving DXS255 and maps to Xp11.22. Hum. Molec. Genet. 2 2129-2134, 1993.Raja KA, Schurman S, DMello R G, Blowey D, Goodyer P, Van Why S, Ploutz-Snyder RJ, Asplin J, Scheinman SJ. Responsiveness of hypercalciuria to thiazide in Dents disease. J Am Soc Nephrol. 200213293844Wrong.O.M., Norden.A. G.W. and Feest.T.G. (1990) Quart. J. Med. 77, 1086-1087.

Advantages and Disadvantages of Cosmetic Surgery Essay

Advantages and Disadvantages of nonfunctional Surgery EssayIntroductionNowadays, many men or women atomic number 18 considering to contact themselves looks better so decided to create cosmetic working(a) process. A lot of cosmetic mental process provider advertising their cosmetic skill and benefit of cosmetic mental process to line more customer. Cosmetic cognitive operation contain positive and negative morality.Question 1Teleology theory can be defined as moral signification position, in which moral behaviour essence achieving an ethical consequence without concern over the process by which the end offspring is achieved. Right conduct with teleology means that which in turn promotes the best consequences or perhaps identifiable good (Craig, 1996). Utilitarianism can say by the phase the greatest good for the greatest sum (Mill, 1983). From the view of Chris, Chris decided to use up nose cognitive operation is moral be engender acting accordance with happiness. None theless, Chris are appearing upon a low delight. Even though the surgical operation will bring Chris several happiness but it is something that become endless pursuit. If there is a propensity for Chris into the future out feeling and looking better, than this sawbones did their avouch job and there is nothing immoral happening. Where the layaway is acceptable and surgeons do not have permit to practice, in pain and annoyance, there is immoral astir(predicate) the particular activeness. After the nose surgery operation, Chris perceive that there was some pain and discomfort after the surgery operation within a play off of week. as well that, Chris having the second operation to correct a minor. After the operation, Chris satisfy with the result and bring Chris happiness.Based on the Chriss decision to take perform on cosmetic surgery, Chriss grow was fully disagree Chris to having the nose surgery. Because Chris didnt know what are the risk will occur during the operation. Ch riss mother keep on recall back the story of famous footballers wife which who are the one kept going for cosmetic surgery and passed away because of complication after the operation. From the view of Chriss mother is based on deontology theory. Deontology define since the rightness as well as handleness of action by evaluation of particular formal properties of act for instance duty, justice as well as respect a great individuals autonomy (Stahl, 1996). All of the parents will worry rough their child by doing some activities to damage or hurting themselves because of this, parents will have the responsible to bend the activities happen. Even Chriss mother in addition tried to persuade Chris do not have cosmetic surgery is because Chriss mother worrying about Chris will have any danger during the operation. In the other way, Kantian ethics believe that consequence could never make right or wrong because an action may bring the happiness but still might be wrong. Because of the p rominent nose was bring Chris unhappiness and dissatisfaction so Chris decide to have nose surgery for the beauty and seeking happiness.Question 2Archie B Carroll said that the definition of merged Social Responsibility (CSR) has four type of smorgasbord which intromit economic responsibility, effectual responsibility, ethical responsibility and discretionary responsibility (Carroll, 1979). These four type of forebodings reflect a view of social responsibility that colligate to some in the definitions made available earlier although that categorizes the social responsibilities connected businesses within a more inclusive manner. In order to make the Naturea clinic be more profitable, the Naturea clinic have to maintain a strong competitive position in surgery indus attack. Therefore, the Naturea clinic have to maintain a high level of operative efficiency by providing the best service quality to fulfill customer need and make sure the customer satisfied with the result after t he surgery. Naturea clinic employees had been schooling to do them proceed within a cautions along with measured method, but the employees are being chivvied with the management team to become more energetic and market-facing to make the clinic more profitable. In addition, the Naturea clinic should perform in a manner consistent with maximize earning per share.Furthermore, Naturea clinic must obey to the law cause of law is the societys codification of right and wrong. Clinic have to perform in a manner in keeping with the expectations of government along with the law and it is also important to follow with numerous national and supranational laws and regulation. Other than that, Naturea clinic have to meet the minimum legal requirements by providing goods or services. For example, a qualified surgeons provide face or body plastic surgery to satisfy customer need. The rules and regulation for Naturea clinic by not doing illegal activities such as providing fake information about the cosmetics surgery, dishonesty customer by saying do not have any risk occur during the surgery operation.Ethical responsibility encompass those standard, norms, or expectation that reflect a concern for just what consumers, workers, shareholders and the community consider as fair, just or commensurate with the esteem or protection of stakeholders moral legal rights. The Naturea medical team members complain amongst themselves the company has been hijacked by the team of the animal trainers and the medics feel very pressure to hit the targets pertaining to the number and characteristics of operations are expected to perform. The manager of the Naturea clinic should treat their employees fairly, provide training to surgeons to ensure become a qualified surgeon to satisfy customers and do not give them high pressure when performing their work. Ethical responsibility for Naturea clinic is important to prevent ethical norms from being compromised as a way to achieve corporate obje ctives. Besides that, ethical responsibility could help clinic to recognize which corporate integrity along with ethical behavior go beyond mere compliance with regulations. Lastly, the ethical responsibility also important to Naturea clinic by recognize and also respect fresh or innovating moral ethical norms used by society.Discretionary responsibility almost equivalent philanthropy initiatives try to be good corporate citizen by doing some community activities, charitable work, donation to good causes and providing day-care centers to create a positive image for company (Blowfield and Murray, 2008). The Naturea clinic should do some charity activities such tend to arrange for teams of volunteer physicians carrying medical supplies to complete the mission. Increasingly, these teams also work to improve medical infrastructures and to train personnel. The manager and employees of Naturea clinic take part in voluntary and charitable activities within their local communities. Cause- related marketing (CRM) occurs when a company forms a strategic dealingship with a particular social cause that are mutually advantages to all parties (Kolter and Lee, 2005). CRM are advantage to Naturea clinic such as, increasing the clinic population, increasing the brand awareness and services quality, developing good public relations and increasing the customer loyalty. And there are advantages for the social cause by increasing in donations through better exposure.Question 3For some, plastic surgery is an approach to recover an ordinary appearance after a mishap. For other, plastic surgery is an approach to revise saw corrective blemishes. Despite the purpose foundation the plastic surgery, there are serious discriminates that must be considered before having surgery (Holley, 2013).The first disadvantages of having surgery is medicals risks. Plastic surgery, in the same way as any surgery, convey a danger of medical complications, including death. The absolute most regular d angers connected with plastic surgery are serve bleeding, infection and warmness damage that may lead to dumbness, tissue death, fluid collecting around the site (seroma) and wounding in the range. Blood clusters can profound vein thrombosis are likewise complications of plastic surgery.The second disadvantages of having surgery is about the appearance. Unsightly scarring is also disadvantage of plastic surgery. With these scar, which are called hypertrophic scars, are thick and red. Wounding and swelling for a period of time after the surgery are frequently hard to cover up, particularly when the work was carried out in the facial neighborhood. Besides that, Ptosis or drooping and sagging in the surgical area, might be another disadvantage. Furthermore, some of the affected roles expose that the result of the routine are not what they anticipated.The next disadvantage is cost of the plastic surgery. Numerous plastic surgery procedures are costly. As indicated by American fell owship for Aesthetic plastic surgery, microdermabrasion was the least expensive procedure which costs an average of $139 per procedure and the most expensive with a costs of $7,976 is a lower body lift. Besides that, there are some fees also will be calculated when considering the costs of plastic surgery which is surgeon fees, hospital fees and anesthesia fees, along with lost wages and medication costs.Cosmetic surgery touristry can be defined as the motion of the patients from one location to another to carry out aesthetic medical procedure, which is the growing area of medical tourism (Reisman, 2010).Some of the activities like sunbathing, drinking alcohol, jet skiing and swimming should be avoided after surgery said by the American Society of Plastic Surgery (ASPS) (ASPS, 2008). The disadvantage of cosmetic surgery tourism is that impossible for the patient to meet up the doctors to operate on the patient before travelling, it is unavoidable to have a talk with doctor or surg eon to know detail of the surgery and the effect of travelling for operation.Many patient lack of familiarity about the problem of cosmetic surgery oversea. An accident or bad cosmetic surgery can occur. For example, Elliott (2004) reported that a patient had liposuction on her legs and the surgery so radical that the patient leg badly dimpled and require more fat to fill them out. All cosmetic surgery possible present the dangers to patient or tourist health.Some of patient face extra language and culture barrier that obstruct communication with physicians and nurses (Casanova, 2007). When post-operative individual decide in tourism activities will raise the chances of undesirable results and complications.Question 4From my opinion, I felt that the advertising of cosmetic surgery by clinics such as Naturea should be banned. As of now, cosmetic surgery supplier are free to promote their services without any restriction on content. The advertisement heedlessly trivialize invasive su rgical procedures that consist of inherent heath risk. Every people have their own definition of beauty. Genuine beauty lie in your individuality, if one of the boy or girl consider as ugly but they have a good personality which mean there is still have people find them because they are attractive. But the cosmetic surgery trend has misdirect the people into imaging that looks are generally vital. They may duplicate their idols looks so they can like themselves and be acknowledge in general. This would be bad for the society. We should respect our parents because our looks are a present from our parents, if we have cosmetic surgery and changed our looks are considered as cheating. Besides that, some of the advertisement show that cosmetic surgery do not contain any risk and guarantee that the surgeons is a qualified surgeons and have their own license. All of the advertisement is tried to cheat customer and actually cosmetic surgery involves risk such medical risk. Some of the surge ons might not have a license or unqualified surgeons, if you having cosmetic surgery from the surgeons that do not have license and not a qualified surgeons and the end result is not what you expected, you would not be able to do anything on it. Currently, people have no choice, but still exposed the aggressive marketing temporary hookup of some cosmetic clinics, whether in the public, social media such as internet, magazines or advertising on TV. Because of these, the advertising will affect everyone that already considering to have the surgery. closeAs a conclusion, cosmetic surgery can satisfy what customer need and also will damage to the customer after the surgery. If cosmetic surgery fulfill the happiness of the customer then the action of the surgeon is moral. And there are four responsibility in corporate social responsibility which include economic, legal, ethical and discretionary responsibility. There is also a disadvantage of having cosmetic surgery and cosmetic surgery tourism.(1946 word)ReferencesASPS, (2008), Warnings of ASPS, Online Available fromhttp//www.plastisurgery.org Accessed 7 April 2015Archie B. Carroll. (1979). The Academy of Management Review, Vol. 4, No.4 (Oct., 1979), pp. 497-505Blowfield, M., Murray, A. (2008). Corporate Responsibility a critical introduction, Blackwell Publishing, Oxford, UKCraig, E. (1998).Encyclopedia of Philosophy. London and hot York Routledge.Casanova, E. (2007) The Whole Package Exploring Cosmetic Surgery Tourism, Online Available fromhttp//www.allacademicresearch.com Accessed 6 April 2015Elliott, J. (2004) Do not Rush into Cosmetic Surgery, Online Available fromhttp//www.bbc.co.uk Accessed 6 April 2015Holley, Casey. Disadvantages of Plastic Surgery LIVESTRONG.COM. LIVESTRONG.COM. N.p., 2013 Online Available from http//www.livestrong.com/article/23750-disadvantages-plastic-surgery/ Accessed 5 April 2015Kotler, P. Lee, N. (2005). Corporate Social Responsibility doing the most good for your company and y our cause Wiley Publications, New Jersey, USAMill, John Stuart. The Collected Works of John Stuart Mill. Gen. Ed. John M. Robson. 33vols. Toronto University of Toronto Press, 1963-91.Reisman, D. (2010) Health Tourism Social Welfare through International Trade. Cheltenham Edward Elgar.Stahl DA. Ethics in subacute carepart1. Nurs Manage. 199627(9)29-30.Thomas MCElhenney The Ethical Issues behind Cosmetic Plastic Surgery. Online Available from http//parenethical.com/phil140sp11/2011/03/07/thomas-mcelhenney-the-ethical-issues-behind-cosmetic-plastic-surgery-and-how-js-mill-and-immanuel-kant-would-view-it/ Accessed 8 April 2015

Aluminium Based Metal Matrix Composites

Aluminium Based Metal Matrix Composites1)The main factor that influences elastic modulus is the intercellular substance , for example Composites with a atomic number 13 6061 matrix have a good strength and higher ductility. The funding content is the main factor in the enhancement of elastic modulus in the aluminium silicon metal matrix composite.The graph below show that aluminium silicon composites with higher strength, because of the increased silicon content, more(prenominal) as 2024/2124 or 7075 Al, had higher strengths only when lower ductility. It also shows that the elastic modulus increased with the increase in the silicon content. The matrix type also effects the elastic modulus which typically consists of particulate, nodule or whisker type matrix. (Reference 3)The yield strength is usually effected by the matrix alloy ,type and the arrangement of the reinforcement effect the strengths of composites, in particular for those which have whisker reinforcement and Duct ility tends to decrease with the reinforcement content is increased.In fracture gruffness tests, an increase in p term amount reduced the toughness of the composites .The main properties which influence the fracture toughness of MMCs is the type of reinforcement, size, shape, quantity and the distribution within the matrix and the toughness of matrix. The forgetful fracture toughness and fatigue crack growth rate of MMCs is due to low initiation energy for fracture due to high elastic modulus.The thermal expansion coefficient of aluminium silicon carbide fibres strengthened veridical is significantly influenced by the thermal stresses between the matrix and fibres and thermal expansion behaviour relies on the thermal expansion of the fibres. For applications subjected to unspeakable loads or extreme thermalfluctuations such as in automotive components, discontinuously-reinforced metalmatrix composites have been shown to offer near isotropic properties automotive brake disc an d callipers are typically made of cast entreat, the use of aluminium silicon MMC, would result in a significant weight reducing of around 50- 60% can be made which helps reduce vehicle fuel consumption and improve overall braking and handling as well as the high thermal conductivity and better subway, dimensional stability and excellent cyclic persist properties. Examples of vehicle which have SiC-reinforced aluminium brake disks are vehicles such as the Lotus Elise Volkswagen Lupo. For aluminium composite brake discs to become more common would requires costs to come down and for improved machine ability.Aluminium MMC shows often higher resistance to wear than the matrix material by its self. The wear of MMC is overmuch more linear than the matrix material by self, and therefore makes it contingent to predict wear patterns and the amount of use than can be obtain from a component. The reinforced particles resist the chicken feed and restrict the deformation of MMCs which adds a utilizable guide for bankrupt control of their wear. (reference 5)MMC shows much higher wear resistance than the be matrix material unlike that of matrix material, the wear of MMC is very much linear and practical to predict slow the wear tool is similar for some(prenominal) materials other than the three-body sugar in the sheath of MMC the reinforced particles resist the abrasion and restrict the deformation of MMCs which causes high resistance to wear. These results reveal the roles of the reinforcement particles on the wear resistance of MMCs and provide a usable guide for a better control of their wearMMC shows much higher wear resistance than the corresponding matrix material unlike that of matrix material, the wear of MMC is very much linear and possible to predict easily the wear mechanism is similar for both materials other than the three-body abrasion in the case of MMC the reinforced particles resist the abrasion and restrict the deformation of MMCs which causes high resistance to wear. These results reveal the roles of the reinforcement particles on the wear resistance of MMCs and provide a useful guide for a better control of their wearMMC shows much higher wear resistance than the corresponding matrix material unlike that of matrix material, the wear of MMC is very much linear and possible to predict easily the wear mechanism is similar for both materials other than the three-body abrasion in the case of MMC the reinforced particles resist the abrasion and restrict the deformation of MMCs which causes high resistance to wear. These results reveal the roles of the reinforcement particles on the wear resistance of MMCs and provide a useful guide for a better control of their wear.MMC shows much higher wear resistance than the corresponding matrix material unlike that of matrix material, the wear of MMC is very much linear and possible to predict easily the wear mechanism is similar for both materials other than the three-body abrasi on in the case of MMC the reinforced particles resist the abrasion and restrict the deformation of MMCs which causes high resistance to wear. These results reveal the roles of the reinforcement particles on the wear resistance of MMCs and provide a useful guide for a better control of their wear.MMC shows much higher wear resistance than the corresponding matrix material unlike that of matrix material, the wear of MMC is very much linear and possible to predict easily the wear mechanism is similar for both materials other than the three-body abrasion in the case of MMC the reinforced particles resist the abrasion and restrict the deformation of MMCs which causes high resistance to wear. These results reveal the roles of the reinforcement particles on the wear resistance of MMCs and provide a useful guide for a better control of their wearMMC shows much higher wear resistance than the corresponding matrix material unlike that of matrix material, the wear of MMC is very much linear an d possible to predict easily the wear mechanism is similar for both materials other than the three-body abrasion in the case of MMC the reinforced particles resist the abrasion and restrict the deformation of MMCs which causes high resistance to wear. These results reveal the roles of the reinforcement particles on the wear resistance of MMCs and provide a useful guide for a better control of their wearMMC shows much higher wear resistance than the corresponding matrix material unlike that of matrix material, the wear of MMC is very much linear and possible to predict easily the wear mechanism is similar for both materials other than the three-body abrasion in the case of MMC the reinforced particles resist the abrasion and restrict the deformation of MMCs which causes high resistance to wear. These results reveal the roles of the reinforcement particles on the wear resistance of MMCs and provide a useful guide for a better control of their wear3)From data gathered with the use of t he CES software it gave for of the most suitable manufacturing method for a metal matrix component with slots in the design. The above graph so that these four mathematical product methods were Laser powder forming, squeeze casting, powder injection molding and die wedge sintering. Several criteria were considering during the material selection such has relative cost index , production rates , tool life and economic batch size.looking at the CES data , it showed that the most suitable production method be die cast and sintering. With die casting and sintering a relatively high rate of production can be achieved whilst keeping the relative cost index low. This is important because it helps lower the cost of aluminium MMC brake disc which are still costly and not used by many manufactures because of this.Pressing and sintering is a powder forgeing process that falls in the manufacturing process category of forming .The typical low temperature pressing and sintering process starts with aluminum silicone MMC in powder being poured into a closed mould. Pressure is then applied to the closed mould at a high enough pressure for the powder to bind together. After the disc is taken out of the mould it is then put through the sintering process. The sintering process begins with the brake disc being heated up in order to burn of any lubricant and is then heated up to a unconstipated higher sintering temperature in a protective gas surrounding to prevent oxidization. (reference 2)4) There has been an increased interest in the use of Aluminium based metal matrix composites in brake discs and drums in recent years. The wear characteristics of AMMCs were high speeds and loads the behaviour could be greatly improved beyond that of cast iron discs, with the correct match of disc and pad material. Casting process is very difficult if reinforcement Material is wet and this can results in non-uniform distribution and poor mechanical characteristics for the finished brake di sc. To resolve this problem, reinforcements are pre-heated at 500C for 40 minutes. Porosity is the major problem in casting which is wherefore moulds are preheated, to 500C, which helps in removing the gases which are trapped in the slurry to go into the mould. It also enhances the mechanical properties of the cast AMC. Sorter fibres in a random orientation course are typically not as strong as long fibres in a specific orientation. However the use of sort fibres in random orientation means that less human interaction is required in the production and therefore helps brings the cost of production and well as minimising the possibly of something going wrong in the production process my eliminating human error. SiC/Al composites have increased strength with the increase in the silicone content and had higher strengths but lower ductility.The use of durable fibres also means that they generally have to be arranged in a specific order which is time overpowering and also requires hu man interaction and this all reduces the number of units that can be produced a day. An example of this carbon ceramic brake disc where the discs which have longer fibres cost significantly more and will only be used in very exotic cars such as Koenigsegg where as more cypher sports cars such as Porsche tend to use discs with sort random fibers which are far more cost effective.Bibliography1) A. Mazahery, M. O. Shabani . (2012). Mechanical properties of A356 matrix composites reinforced with nano-SiC particles. Available http//link.springer.com/article/10.1007/s11223-012-9423-0. lastly accessed 16/12/20162) unknown. (2004). Aluminum Matrix Composites with Discontinuous Silicon Carbide Reinforcement. Available http//www.totalmateria.com/page.aspx?ID=CheckArticlesite=ktnNM=108. Last accessed 16 December 20163) Ajit Bhandakkar1*, R. C. Prasad1, Shankar M. L. Sastry2. (2014). Elastic plastic fracture toughness of aluminium. Available http//www.vbripress.com/aml/uploads/540c820f6cee714 10105871_fullabstratct.pdf. Last accessed 16 December 2016.4) S. Taufik a, , S. Sulaiman b . (2014). Thermal Expansion Model for Cast Aluminium Silicon Carbide . Available http//www.sciencedirect.com/science/article/pii/S1877705813020511. Last accessed 16 December 2016.5) Parth S. Joshi, Kiran C. Hegade, Apoorv S. Kulkarni . (2016). Manufacturing of Disc Brake Rotor Using. Available http//www.onlinejournal.in/IJIRV2I6/226.pdf. Last accessed 16/12/2016.The machinability of an Al-5 Mg alloy reinforced with 5 vol% Saffil and 15 vol% SiC was compared with that of Duralcan (A356) reinforced with 15 vol% SiC. In terms of tool wear and metal removal rate with both cemented carbide and polycrystalline adamant (PCD) slash tools, it was found that the Duralcan/ SiC was significantly easier to machine than the composite with the Al-5 Mg matrix. This is attributed to the effect of the matrix on the mechanisms of abrasion wear. The machinability of an Al-5 Mg alloy reinforced with 5 vol% Saffi l and 15 vol% SiC was compared with that of Duralcan (A356) reinforced with 15 vol% SiC. In terms of tool wear and metal removal rate with both cemented carbide and polycrystalline diamond (PCD) cutting tools, it was found that the Duralcan/ SiC was significantly easier to machine than the composite with the Al-5 Mg matrix. This is attributed to the effect of the matrix on the mechanisms of abrasion wear.

King Arthur and the Knights of the Round Table Essay examples -- Camel

The legend of King Arthur and the Knights of the fill in Table is a story mixed with historic truths and exaggerated fiction. The legend of King Arthur, thump laidn as the Arthurian fabrication, comes from the Middle Ages and is both fact and fiction. thither really was a King Arthur who was king of the Britons. He was a type of military leader who fought Germanic invaders. Many of the Tudor monarchs claimed lineage to King Arthur to justify and prove their right to the throne. Most of the knowledge of Arthur is legend. There is no doubt, though, that stories about him have influenced literature, society, music, and art from the Middle Ages. (King Arthur 1) Arthur was the illegitimate son of King Uther Pendragon and Lady Igraine, who was married to the Duke of Cornwall. After Arthur was born he was given to Merlin, a man believed to be a prophet, who cared for him and then gave him to Sir Ector. (Arthur 1) Merlin stayed in touch with Arthur as his tutor and also guided him throughout the rest of his life. (Arthurian 1-5) Arthur was raised on base Ectors son, Sir Kay, but knew nonhing of his royal ancestry. ( Ackerman, 757) One day there was a tournament for the knights. Sir Kay had forgotten his sword and sent Arthur back to get it. Arthur did not know where the sword was but he did remember where a sword in a stone was located. Arthur went and pulled the sword out of the stone. He took this sword back to Sir Kay. When he returned with this sword all the knights recognized the sword in the stone. The knights did not believe Arthur had pulled the sword from the stone so they all went back and made him do it again. Legend stated that whoever removed the sword from the stone was supposed to be crowned ... ...ing Arthur the group of men known as the Knights of the Round Table began to gradually get smaller until they were no more. This sad end to this group of men became known as the end of chivalry and the end of knigh thood. (Ackerman. Round Table, 495) The legend of King Arthur and the Knights of the Round Table may be just that-a legend. But there are some facts that may prove some of these men actually lived, though not exactly the way they are described in the legend. There is no doubt that the Arthurian Legend still lives in the stories, poetry, and literature of the English and British culture and in many childrens books. The books and poems tell about the highest ideals of chivalry, bravery and honesty romantic qualities that legends are made of.Perhaps there were, a long cartridge clip ago, real men who took up these qualities and lived storybook lives.

Biological Techniques :: essays research papers

1. (a) I. Plasmids are important tools in molecular biology. Plasmids are small circular deoxyribonucleic acid that has the ability to enter and replicate in bacterial cells and can be used as vectors to introduce foreign agents into bacteria for cloning and sequencing. Any gene must be inserted into an appropriate mess of a plasmid to be expressed. The importance of a plasmid is in the step of cloning and sequencing when the construction of a recombinant DNA molecule occurs. The target gene fragment is ligated to a plasmid, and becomes recombinant DNA. Then the plasmid can replicate autonomously in an appropriate host organism.II. The polymerase chain reaction (PCR) is the amplification of DNA sequence by repeated cycles of strand seperation and replication. This is a direct method of making copies of a desired DNA sequence, unlike the technique exploitation plasmids. PCR is a process rather like DNA replication. It is still the process of two DNA strands unwinding, replicatin g, and then reannealing, however the strands are separated by heat. Generally temperatures must be change magnitude to 94-96 degrees C for the hydrogen bonds to break and the separation to occur. Once the stands are separated they can be used as templates for complementary strands to be synthesized by DNA primers. After the strands are completely synthesized, the temperatures are brought back down to 50-65 degrees C for the primers to anneal with the template DNA, and a DNA polymerase can build complementary strands using free nucleotides that have been added to the solution.III. Restriction fragment length polymorphism (RFLP) analysis is a technique in which DNA regions are digested using restriction endonucleases, and subjected to radioactive complementary DNA probes to compare the differences in DNA fragment lengths between individuals. The DNA in question is digested using restriction endonuclease(s). The DNA is then cater on a gel and appears to be very long. The gel is subje ct to a chemical that causes the double-stranded DNA to separate into to individual strands. The strands are then transferred to a nylon membrane with using an electric current, where it will bind. The transfer process is called Southern blotting.