Types of Modified Starch

Types of Modified Starch Native starches are structurally too weak and limited functions for application in pharmaceutical, food and non-food technologies due to its inherent weakness of hydration, swelling and structural organization. Unprocessed starches produce weak-bodied, cohesive rubbery pastes when cooked and undesirable gels when the pastes are cooled. To enhance viscosity, texture, stability among many desired functional properties desired, starch and their derivatives are modified by chemical, physical, and enzymatic methods. Modifications are necessary to create a range of functionality. Starch modification can be introduced by altering the structure and affecting the structure including the hydrogen bonding in a controlled manner to enhance and extend their application in industrial prospective. This modification includes esterification, etherification, cross linking, acid hydrolysis, enzymatic hydrolysis heat treatment and grafting of starch. Modified starches can be found applicable practices in food industry and non-food industry. Various types of modified starches for wide applications in many industries Pregelatinized starch It is the simplest starch modification, prepared by cooking. It maintains starch integrity while providing cold water thickening which   is a process that breaks down the intermolecular bonds of  starch  molecules in the presence of  water  and heat, allowing the  hydrogen bonding  sites (the hydroxyl hydrogen and oxygen) to engage more water. Cross-linked starch Cross linking is the most important modified form that used in the food industry. It involves replacement of hydrogen bond present between starch chains by stronger, permanent covalent bonds. Distarch phosphate or, adipate are commonly used in cross-linked starch. Cross-linked starches offer acid, heat and shear stability over the native starch. Food with this type of starch processing tends to have longer shelf life. Oxidized starch The processing includes reaction with oxidizing agent such as sodium hypochlorite or peroxide. This type of starch is mainly used as surface sizing agent or coating binder and available in different viscosity grade. Oxidized starches have shorter chain lengths than native starches. It improves whiteness and reduces microbiological content. Oxidized starches are the best thickener for applications requiring gels of low rigidity. This improves adhesion in batters and breading. Cationic starch Cationic starches are produced by reacting native starches with tertiary  or, quaternary amines, using wet or dry production processes. They are mainly used in  paper forming process. Cationic starch represents high performance starch derivatives widely used by paper manufactures to increase strength and retention. Cationic starches carry a formal positive charge over the entire pH range creating their affinity towards negatively charged substrates, such as cellulose, pulp and some synthetic fibres, aqueous suspensions of minerals and slimes and biologically active macromolecules. Cationic starch is also added at the beater to improve drainage on the wire, better sheet formation, and enhancement of the sizing efficiency of an alum-rosin size. Anionic starch Anionic starches are prepared by reaction with phosphoric acid and  alkali metal phosphates or by making derivative with carboxymethyl group. Thinned starch These are produced through depolymerisation reaction by hydrochloric acid or other acids. Unmodified starches are treated with a mineral acid at temperature lower than gelatinization and results in partially hydrolyzed starch molecules. This cleaves the chain length and lower viscosity. It increases the tendency to retro gradation. The lower viscosity permits higher concentrations to be used forming rigid gels in gums pastilles and jellies. In these applications, increased set-back leading to the formation of strong gels gives these starches significant advantages over native starches. Extended applications in food industry are found by acid-thinned starch in conjunction with esterification and etherification reaction. Acetylated starch Acetylated starch (E1420)  esterification  with  acetic anhydride Starch after treatment with acetic anhydride produces starch esters which are useful in biodegradable applications. In particular, high starch acetates provide thermo plasticity, hydrophobicity and compatibility with other additives. The result of this treatment is a stability starch which will produce pastes that will withstand several freeze-thaw cycles and prevent syneresis (weeping) occurs. Wide applications are in foods as texturing agent and provide good freeze-thaw stability. Extended applications in food industry are found by acetylated starch in conjunction with cross-linked starch. Dextrin Dextrin  (E1400) is formed by  roasting the starch with  hydrochloric acid. Dextrination is the heating of powdered starch, mostly in the presence of small amounts of acids, at different temperatures and with different reaction times. Dextrin is used as adhesives in paper and textile based industry. Grafted starch Grafted starches are produced by free radical copolymerization with ethylenically unsaturated monomers. Starch grafted with synthetic polymers is most utilized   tarches from different botanical origins were grafted with 1, 3 butadiene, styrene, acrylamide, acrylonitrile and Meth acrylic acid using free redox reaction. Starch ethers Starch ethers are produced by a nucleophilic substitution reaction with an ethylenically unsaturated monomer, followed by acid-catalyzed hydrolysis for viscosity adjustment. Physically modified starch Native starch can be modified with mechanical treatment, using spray drying technique, annealing technique Enzyme modified starch Enzyme-treated starch which includes maltodextrin,  cyclodextrin Starch modified with amylase enzyme produces derivative with good adhesion property and mainly used in coating the food with colorant. APPLICATION IN FOOD INDUSTRY Frozen Food To stabilize the food products starches are used in frozen bottle foods to provide freeze-thaw stability and retrogradation. Flavor Encapsulation Modified starches are used to encapsulate or, preserve the flavour of the food products. Octenylsuccinylated derivatives and other starch hydrolyzates are used as flavour encapsulation. Dairy Products Modified starches are used in a wider way to the dairy products; it provides variety of effects, including enhanced viscosity, cut ability, mouth feel and stability. In puddings, starch is used to enhance viscosity and smoothness. Starches are used in yogurts and sour cream to control syneresis and enhance thickness. Canned Food Canning process preserves food for up to several years by achieving a temperature sufficient to destroy or inactivate food poisoning or spoilage microbes. Starch is most commonly used to thicken, stabilize and enhance the mouth feel of canned foods such as puddings, pie- fillings, soups, sauces and gravies. Highly cross-linked starches are used for this purpose.

Sex Change

The issue of sex (besides being a national obsession) is reasonably interesting from a psycoanalytic and existential perspective. A lot of what drives us is sexual energy (in line with what Freud told us). This so-called energy isn't explicit, but if you stop to think about questions like â€Å"Why am I here? † the â€Å"I† refers to you as a being and your sexuality is intimately tied with that. That â€Å"I† differs quite radically based on whether you are male or female. From a purely reductionist perspective, we are simply â€Å"ugly bags of mostly water† (to use a phrase from Star Trek) for our genes. The main reason we have sex is so our genes can last. The reason that there's sexual dimorphism (as opposed to having only females reproducing asexually) is so the gene pool can be enriched and it is thus capable of withstanding sudden changes in environment. This is actually the reason why there is sex in the first place, but having dimorphism means having a gene pool (thereby phenotype) that's more varied. The sociological perspective is somewhat interesting, but I think it's very irrelevant. In the end, the psychological (perhaps biological) dominates and therefore it it is the one I will consider. I have always wondered what it would be like to be female. I have wondered what it feels like to experience the menstrual cycle each month, to give birth, etc. My perception of what â€Å"I† consitutes would be radically different, I assume, notwithstanding the sociological consequences of becoming female. Human males and females are pretty different in their genetic makeup, given that an entire chromosome present in males is not present in females (and this doesn't even address the issue of expression). This brings us to the interesting fact that a lot of textbooks quote: chimpanzees and humans have DNA which is more than 99% identical. I wonder what the basis of their comparison is, but I digress†¦ A few decades ago, the above sort of thinking would've been mere speculation. Existentially speaking, we are prisoners of our bodies and this sucks. But we humans, being the creatures with superior intellect (yeah, right), have taken control of our environments and now it is possible to reasonably answer some of the questions I ask above in a physical sense. I read an article (parts of which are reproduced here without permission) about this dude who underwent a sex-change operation to be female because he wanted to be a lesbian. He was considered a womaniser, but he really identified with girls and expressed his sexuality by cross-dressing, etc. But after a while he began the process of change. He took females hormones—the most effective blend being premarin, derived from the urine of a pregnant mare—-to produce breasts, greater sub-surface fat, diminished muscle mass and less skin oil than a man normallly secretes. However, hormone treatments cannot shrink the Adam's apple, alter the hips, or raise the voice; male vocal chords are irreversibly developed by adolescence. He also underwent a lot of sartorial changes as well. Finally the irreversible operation known as â€Å"neo-colporrhaphy†, or â€Å"new vagina†, was performed on him. Contrary to popular myth, this two-and-a-half-hour surgery does not involve the penis being cut off. It is instead emptied of its spongy tissue and, like the finger of a rubber glove, turned inside out. The skin of the penis is gently pushed into a cavity formed by separating the lower abdominal muscle fibres, and this inside-out formation becomes the vaginal lining. The scrotum is used to create the frontal lips of the vagina; some of the skin at the base of the inverted penis can be surgically sculpted to look like a clitoris. Enough of the urethra is preserved from the penis to tunnel it under the tissue and place it in the female position. (There was a reasonable discussion during the Beer Social here regarding the logistics of such an operation—in particular the issue of providing lubrication was thought important. ) According to John Money, a professor emeritus at the Johns Hopkins University School of Medicine, who's an expert on this procedure (I can see a lot of demand for it): â€Å"The majority of transsexuals no longer have the spasmodic sensation that comes from squirting out semen. They have, instead, more of a spreading glow that is very satisfactory indeed. † This dude (now dudette) is also married with kids and they still call her â€Å"daddy†. She and her wife get along very well and they find the relationship physically very satisfying. While I share a lot of the philosophy that prompted him to become a transvestite, I doubt if I would undergo such an operation. Perhaps if technology advances so that it can be done in a â€Å"perfect† way, but approaches like this somehow don't grab me. This isn't the only way to go. If you're female, you might contemplate becoming male. I read a while ago about how a female had an operation to have a penis implant. Such physical moves seem very drastic to me, even given what I said earlier about sexual energy driving us. Is the artificial physical change necessary in order to experience a female (or male) existence? While the reason for contemplating what it is to be female is mostly curiousity, it might have to do with my nurture as well. It is said that transsexuals are unhappy with their identities and that they seek an out, but will a physical transformation help them? Shouldn't reconcilation of one's identity with one's self, and transcendence of that identity beyond societal norms, be enough? If you are Cartesian (and to some extent I am), it should be. Maybe Freud was completely off about the Oedipus complex—maybe it's something akin to the Penis Envy thing he proposed—there's some sort of a Vagina Envy among males. Thanks to modern science, this envy can be sated. The surgery costs about $11,000. If you include other plastic surgery such as a nose job and breast implants, the total cost is about $25,000. Now to raise some money†¦

Essay On No Child Left Behind Act - 1247 Words

In 2004, coinciding with the conclusion of President George W. Bush’s first term in office, United States Secretary of Education, Rod Paige, released an essay depicting the successes of his administration. Paige’s department spearheaded the initiative sparked by the No Child Left Behind Act, a set of policies enacted to reform education and provide students with an improved degree of learning more suited to the evolving job market. Paige brings light to the findings of his administration, presenting what he considers to be evidence explicitly showing the successful nature of these programs. Through numerous faults with his argumentation and reasoning, however, Paige’s opinion on the outcome of said policies is highly debatable. To judge†¦show more content†¦With standard grading processes on the school level, motivation for sufficient learning is advancement and graduation from that educational branch. Except in cases of completely deteriorated motivatio n from the student, typically culminating in said student dropping out on their own accord, this incentive to complete the curriculum typically maintains student motivation. The shortsightedness of such testing is the assumption of a unified degree of student motivation, especially at the high school level (Forte, 2010). Standardized tests administered to student at this age group are frequently low pressure and low stake. Because the tests pose far less consequence to the student, and motivation for students can occur on such a wide spectrum, test results become far less uniform than expected (Ryan, Ryan, Arbuthnot, Samuels, 2007). When applied to a common, realistic scenario, the model begins to break down. For example, an unmotivated student would characteristically perform poorly on a test. When the scores are returned, however, the school is still expected to facilitate this student’s learning in order to resolve the previous score, following the trend of school culpabi lity. Due to differing degrees of motivation, the test results therefore possess a significant potential for ambiguous validity, which subsequently requires filtering of test results to stabilize the statistics (Wise, Wise, Bhola, 2006). To filterShow MoreRelatedNo Child Left Behind Act Essay1166 Words   |  5 Pages1. Definition of the Policy The No Child Left Behind Act of 2001 (NCLB) signed into law by President George W. Bush on January 8, 2002, is a comprehensive overhaul of the federal governments requirements of state and local education systems (www.nclb.gov). It reauthorizes the Elementary and Secondary Education Act of 1965 and replaces the 1994 Improving Americas Schools Act. 2. General Background Information President Bush has made education his number one domestic priority (www.ed.gov). OnRead MoreEssay on The No Child Left Behind Act953 Words   |  4 Pagesare being left behind† (www.ed.gov). The â€Å"No Child Left Behind† Act expands the federal government’s role in elementary and secondary education. The NCLB act was enacted January 8, 2002, and has four reform principles to the act: Accountability, flexibility, Researched-based reforms and parental options. Accountability begins with informed parents, communities and elected leaders so we can work together to improve schools. The states will measure the progress by testing every child in grades 3Read MoreNo Child Left Behind Act Essay642 Words   |  3 PagesNo Child Left Behind Act Making the NCLB Act effective is quite a chore for the federal and state legislation. The positive influences for the act are quite controversial. Accountability standards are set and measured on a yearly basis by each individual state. The educator’s qualifications and standards are also state and federally mandated. Reading, math and writing are the key academic subjects that are measured. The goal is to close the gap among race, socioeconomic groups, and disabledRead MoreEssay On No Child Left Behind Act822 Words   |  4 Pagesof Nation at Risk in 1983, and the enactment of new federal law, the Elementary and Secondary Education Act (ESEA) by President Lyndon B Johnson in 1965 all emphasized or established high standards and accountability within the nation’s education system. In 2002, Congress amended ESEA into the No Child Left Behind Act (NCLB). This act reauthorized the Elementary and Secondary Education Act, affecting education from kindergarten through high school for over a decade. NCLB calls for increased accountabilityRead MoreNo Child Left Behind Act Essay1646 Words   |  7 Pages The No Child Left Behind Act was based on the Elementary Secondary Education Act of 1965. The act was established based on the promise of Thomas Jefferson to create a free public education system in Virginia (Hammond, Kohn, Meier, Sizer Wood, 2004). The act is now reauthorized as the No Child Left Behind Act of 2001. The purpose of the No Child Left Behind Act was to make sure that children were given a fair, quality education. The act set out to close the achievement gaps in educationRead MoreEssay On No Child Left Behind Act1303 Words   |  6 PagesNo Child Left Behind Children are the future of this world. In an ideal universe, every child would have the intelligence and skills to become a doctor or lawyer; instead, we live in a world in which intelligence and skills are, across the board, different and unique in every student. In an attempt to create a common ground of intelligence throughout all students, the Bush administration passed the No Child Left Behind Act. Under this act, expectations were created for schools to produce a specificRead MoreEssay on No Child Left Behind Act3562 Words   |  15 PagesThe No Child Left Behind Act Alexis Cross His 324 Dr. Stephan Law February 20, 2010 No Child Left Behind Outline: 1. Introduction a. What I will be writing about b. Why I chose my topic c. What will be covered 2. The NCLB Act d. How it came to be e. What was proposed f. How it has been enacted 3. The NCLB Act g. Arguments in favor of h. Arguments against 4. Statistics i. How the NCLB Act has had a positive impactRead More No Child Left Behind Act Essay1247 Words   |  5 Pages No Child Left Behind Act President Bush quoted, â€Å"Clearly, our children are our future†¦Too many of our neediest children are being left behind† (www.ed.gov). The â€Å"No Child Left Behind† Act expands the federal government’s role in elementary and secondary education. The NCLB emphasizes accountability and abiding by policies set by the federal government. This law sets strict requirements and deadlines for states to expand the scope and frequency of student testing, restore their accountabilityRead MoreEssay on The No Child Left Behind Act1440 Words   |  6 PagesInitiated in 2002, the No Child Left Behind Act (NCLB) of 2001 intended to prevent the academic failures of educational institutions and individual students, as well as bridge achievement gaps between students. This act supports the basic standards of education reform across America; desiring to improve the learning outcomes of America’s youth. No Child Left Behind has left many to criticize the outcomes of the Act itself. Questions have risen concerning the effectiveness of NCLB, as well as theRead MoreNo Child Left Behind Act Essay710 Words   |  3 PagesThe No Child Left Behind Act of 2001, President George W. Bushs education reform bill, was signed into law on Jan. 8, 2002. The No Child Left Behind Act says that states will develop and apply challenging academic standards in reading and math. It will also set annual progress objectives to make sure that all groups of students reach proficiency within 12 years. And the act also says that children will be tested annually in grades 3 through 8, in reading and math to measure their progress.

The Consolidation of Fidel Castro’s Power Between 1959...

Castro and his 26th of July Movement took over Cuba’s streets in January 1959. Though Castro’s charismatic and vibrant personality quickly won him astonishing support, he knew that he had to consolidate his political power by ensuring the trust of the population. The consolidation of Fidel Castro’s power between 1959 and1961 was more of a result of domestic issues rather than United States economic policies. In order, to consolidate power, it was known that the reminder of the revolutionary groups that were involved in the fight against Batista had to be quickly eliminated, so as not to challenge his political ambitions. The revolutionaries brought many of Batista’s prominent military and civilian leaders before trial which were†¦show more content†¦Castro was prepared to eliminate key members of the party for the sake of reinforcing his own power. Thus by July Castro had effectively taken over as leader of Cuba where the nationalist reformers of the government were replaced by his more radical colleagues for example Che Guevara replaced Felipe Pazos. Additionally, Castro argued that elections would interfere with the priorities of new Cuba i.e. full employment, expended health care, extended education and the need to create a new political consciousness among the people. (Leonard). Additionally, Castro’s introduction of land reforms led to an increased support among the Cuban masses whereby making him immensely popular. During the first nine months of 1959 an estimated 1,500 decrees, laws and edicts were enacted. The most change though came with the passing of the Agrarian Reform Act in May 1959 which stated all real estate holdings were restricted in size (1000 acres except for sugar, rice and livestock farms) and the land that exceeded the limits established by the government was nationalized. Most historians assert that this action increased Castro’s support by the masses thereby giving him power. However, Pà ©rez-Stable states

When We Read Capital Volume I By Karl Marx, It Can Certainly

When we read Capital Volume I by Karl Marx, it can certainly seem as though Marx was promoting an individuality in the worker and claiming the way people in a capitalist society behave is unnatural due to being constricted to the system of capitalism. This unnatural system then leads the worker and the capitalist to act in certain ways contrary to what is natural, this leading to an exploitative relationship between the two. However, this view of Marx’s belief neglects the fact that Marx himself equated the worker with economic categories, which are owned and controlled by industrialists and business owners. By exploring how Marx made it abundantly clear that â€Å"(The capitalist) proceeds to consume the commodity, the labour-power he has†¦show more content†¦The problem with those assumptions is that it fails to take into account how Marx consistently diminished the worker and dropped him to the level of a commodity. He makes this clear when he states, â€Å"à ¢â‚¬Å"(The capitalist) proceeds to consume the commodity, the labour-power he has just bought.† In this sentence, Marx is explicitly stating how the workers are not individuals, rather â€Å"commodities† that are used by their owners. According to the New Oxford American dictionary a commodity is, â€Å"A raw material or primary agricultural product.† With that definition in mind, if Marx wanted to humanize the worker, why would he ever describe them as a tool for the capitalists to use whenever and however they wanted? In addition to that, he states that when a capitalist buys the labor of a worker, the capitalist has the right to use him and his power in any way he wants just like, â€Å"a horse he had horse for the day.† It just shows that ultimately, Marx looked at the work as a vulnerable good, in an economic category, that could be used by its owner rather than an individual person. Furthermore, if Marx truly felt that the worker was not just a tool of the capitalist and actually a individual, he would not have stressed that once a worker enters the workplace, he is essentially owned by his employer. Specifically, he stated that, â€Å"From the instant he (worker) steps into theShow MoreRelatedThe Rise and Fall of Class in Britain9826 Words   |  40 Pagesall politicians. Yet it is also ironic (or mistaken), because it remains a generally held belief, not just in Britain but around the world, that class, like the weather and the monarchy, is a peculiarly and particularly British preoccupation. It certainly has been in recent years at 10 Downing Street. For was it not John Major who declared, shortly before becoming prime minister in November 1990 and in a phrase that has continued to resonate ever since, that his aim was to bring about what he calledRead More The Bourgeois Social Class in Chaucers Canterbury Tales Essay5130 Words   |  21 Pagesparalyzed London in 1381. If we accept the CT as a portrayal of Chaucers society (regardless of its accuracy or intent), we must also recognize and explore the obvious and distinct ideological contradictions that pervade his text; for Chaucers attack on the more conspicuous societal ills cannot be interpreted as sincere if there exists, at any level, an endorsement for ideologies that oppress the lower classes and destroy their ability to resist exploitation. We cannot read the CT as an honest criticismRead MoreCommunist Leaders of the 20th Century5824 Words   |  24 Pagesbecoming a revolutionary leader. Lenin was only a teen when he lost his father to a brain hemorrhage. 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The Digestive System Free Essays

The human body consists of number of organ systems which work collectively to execute functions of the body. The three most important human organ systems are circulatory, digestive and endocrine system. The main function of the digestive system is to process food in such a way that the energy molecules are absorbed by the body and the residues are left out. We will write a custom essay sample on The Digestive System or any similar topic only for you Order Now The physiological processes which are required for the digestive system are absorption, digestion, motility, secretion and excretion (Margaret E. Smith, 2001) Digestive System: Digestive system helps the body to maintain stability, equilibrium or balance. Digestive system contributes in homeostatic regulation of the body. The body would suffer if there is no regular supply of energy and nutrients from digestive system. The digestive system helps in absorption of ions, vitamins, organic substances and water that is necessary to the body. When the food is chewed and swallowed, the food is broken down in the digestive tract to very small nutrient molecules which can be easy to enter into the villi of small intestine. (Rebecca L. Johnson, 2004) Digestive enzymes are formed by the pancreas and the digestive tract. Besides this, the liver produces bile which is stored in the gall bladder to digest the fats. By the use of hepatic portal vein, blood passes from smaller intestine to the liver i. e. , in to the circulatory system. The liver is the vital organ of homeostasis and it monitors the blood. The liver produces urea by breaking down toxic substances like alcohol and other drugs. After eating, the liver stores glucose as glycogen and produces plasma proteins. Liver keeps the blood glucose concentration constant by releasing glucose in between eating. This is how the digestive system works along with the other systems which include circulatory system. Organs in the Digestive system: There are several organs in the digestive system. The digestive system can be divided in to two systems. They are upper gastrointestinal tract and lower gastrointestinal tract. The upper gastrointestinal tract consists of several organs like mouth, oral cavity, pharynx, esophagus and stomach. The lower gastrointestinal tract consists of small intestine, ileum, large intestine, anus and rectum. (Cheryl Jakab, 2007) The functions of some important organs include Oral Cavity: The oral cavity or the mouth is the first part of the digestive system. It accepts food by way of ingestion. Here, the food will be broken in to smaller pieces and get mixed with saliva. Saliva helps as lubrication for the food particles. The oral cavity consists of different parts which are helpful in the digestive system. They are tongue and teeth. Small Intestine: The small intestine is about 35 millimeteres in length and grayish purple in color. The small intestine is the longer intestine which is six to seven meters long. The small intestine has the general structure of the GI tract. The small intestine consists of exocrine cells in the mucosa which secretes peptidase, mucus, maltase, sucrose, lipase, maltase and enterokinase. Endocrine cells secrete secretin and cholecystokinin. The process of digestion is completed by the small intestine. It absorbs the nutrients and sends the residue to large intestine. The gall bladder, liver and pancreas are important organs in the digestive system which is closely related to the small intestine. Small intestine is divided in to duodenum, jejunum and ileum. The small intestine helps in several functions such as hormone secretion, intestinal juice secretion, ninety percent absorption, forward propulsion of contents and it is the major site of digestion. Rectum: The rectum can be found in the lowest portion of the large intestine which connects to the anus and it is a muscular tube like structure. The waste is stored here and permits expulsion when pressure on the rectal walls is caused. Anus: The anus is formed by the surface layers of the body, skin and the intestine. The anus is the opening at the end of the digestive tract through which the waste matter is ejected from the body. There are many diseases which are caused due to the improper functioning of the digestive system. The most specific disease is the Ulcer. Ulcer is the disorder caused in the upper digestive tract. Ulcer can be developed in the duodenum, lower part of the esophagus and in jejunum. There are many causes for ulcer. Some of them include certain medications, infection and disorders caused by the over secretion of stomach juices. The symptoms of gastric ulcer include weight loss, feeling heart burn and indigestion and gastrointestinal bleeding. Most of the patients suffering from ulcer suffer from bleeding which results in vomiting blood, anemia or blood through rectum. How to cite The Digestive System, Papers The Digestive System Free Essays The Digestive System Why is it that 1 in 3 people perhaps even more regularly battles some kind of digestion problems? Understanding how the digestive system works will help to understand why digestive problems are so common. The digestive system is more than stomach and intestines. It is a system of organs that turns food into energy and is one of the most important functions the body performs. We will write a custom essay sample on The Digestive System or any similar topic only for you Order Now There are many reasons that cause so many people to suffer with digestive problems. Three of the most common reasons are the lack of knowledge of how the digestive system works, poor nutrition and undiagnosed medical conditions. Lack of knowledge of how the digestive system works is one of the many reasons that cause digestive problems. The digestive system is uniquely constructed to perform its specialized function of turning food into the energy and extracting nutrients necessary to sustain life. It does this by breaking down food into its basic nutrients, which include vitamins and minerals, fats, carbohydrates, proteins and water, before transporting them to the small intestine, where most of the nutrients are absorbed into the body. The digestive system takes place in the alimentary canal, a tube that runs from the mouth to the anus and includes the esophagus, stomach, small intestine, and large intestine, colon and rectum. The liver and pancreas also contribute to digestion, but are not part of the alimentary canal. Digestion begins in the mouth, where chemical and mechanical digestion occurs. Food inters the mouth and is chewed by the teeth, turned over and mixed with saliva by the tongue. The sensations of smell and taste from the food sets up reflexes which stimulate the salivary glands, saliva is produced by the salivary glands and is released into the mouth. Saliva begins to break down the food, moistening it and making it easier to swallow and contains a digestive enzyme called amylase which breaks down the carbohydrates (starches and sugars). One of the most important functions of the mouth is chewing. Chewing breaks the food into pieces and allows food to be mashed into a soft mass that is easier to swallow and digest later. Movements by the tongue and the mouth push the food to the back of the throat for it to be swallowed. A flexible flap called the epiglottis closes over the trachea to ensure that food enters the esophagus and not the wind pipe to prevent choking. Once the food is swallowed, it enters the esophagus, a muscular tube that is located between the throat and the stomach. Food is moved by peristalsis which pushes the food down through the esophagus to the stomach. The stomach is the widest part of the alimentary canal and acts as a reservoir for the food where it may remain for between 2 and 6 hours. The stomach has 3 main functions: to store the swallowed food and liquid; to mix up the food with various hormones, enzymes, including pepsinogen which begins the digestion of protein, hydrochloric acid, and other chemicals; and to slowly empty its contents into the small intestine. The wall of the stomach is impermeable to most substances, although it does absorb some water, electrolytes, certain drugs, and alcohol. At regular intervals a circular muscle at the lower end of the stomach, the pylorus opens allowing small amounts of food, now known as chyme to enter the small intestine. Most digestion and absorption of food occurs in the small intestine. The small intestine consists of 3 parts: the duodenum, the jejunum, and the ileum. The small intestine has 2 important functions. First, the digestive process is completed here by enzymes and other substances made by intestinal cells, the pancreas, and the liver. Second, the small intestine absorbs the nutrients from the digestive process. The inner wall of the small intestine is covered by millions of tiny finger like projections called villi. The villi are covered with tinier projections called microvilli. The combination of the two allows absorption of nutrients to occur. Undigested material travels next to the large intestine. The large intestine is to remove water and salts from the undigested material and to form solid waste that can be excreted. Bacteria in the large intestine help to break down the undigested materials. The remaining contents of the large intestine are moved toward the rectum where feces are stored until they leave the body through the anus. The anus is the last part of the digestive tract. Accessory digestive organs which include the pancreas, liver and gall ladder are not part of the digestive tract or also known as the alimentary canal, but play an important role in the digestive process. The pancreas produces enzymes that help digest proteins, fats and carbohydrates it also makes sodium bicarbonate which neutralizes stomach acid. The liver produces bile, which helps the body absorb fat and it also regulates substances in the blood cells. The gallbladder store s bile until it is needed. The enzymes and bile produced by these organs move through ducts into the small intestine where they help breakdown food. The nutrients from the small intestine travel through the blood to the liver, which help process the nutrients. Digestive problems results from poor nutrition. Good nutrition is essential for maintaining proper functioning of the body systems especially the digestive system. Eating a well-balanced, nutritious diet and maintaining a healthy lifestyle are the best ways to prevent digestive problems and diseases (Lipski, 2005). The kinds and amounts of food a person eats and how the digestive system processes that food plays key roles in maintaining good health and preventing common digestive problems. Since the digestive system is responsible for breaking down food into nutrients that can be absorbed by the body and used for fuel, growth and cell repair. Good nutrition is essential for maintaining proper functions of the body systems. Generally, health experts recommend eating fiber to help prevent constipation and diarrhea. Reduce fats and oils which can slow down digestion. They also suggest drinking plenty of water which helps lubricate food waste so that it passes more easily through the alimentary canal, it helps soften stool which may prevent constipation. Water also helps dissolve minerals, vitamins and other nutrients, there by facilitating their absorption by the body’s tissues. Good nutrition is not only essential for maintaining proper function of the body systems it is also essential for maintaining homeostasis of the body systems. The body needs good nutrition for the body systems to properly function correctly. The digestive system does assist with homeostasis however; it can not accomplish it alone. All organs systems work together to maintain homeostasis. The digestive system provides the nutrients needed for the circulatory system. As the food moves through the stages of digestion (mechanical, peristalsis, chemical) it is broken down into simple water-soluble molecules that can cross cell membranes. Since the circulatory system is the transportation system of the body it transports wastes, gases, hormones, electrolytes and nutrients from good nutrition to and from the body cells. It also transports water to and from the tissues. So as these molecular-sized, water soluble particles pass through the cell membranes of cells in the digestive tract and pass through the walls of capillaries the nutrients are picked up by the blood for transport. Blood in the capillaries carries the nutrients to all the cells in the body. Red blood cells, White blood cells, and Platelets and Plasma all help to maintain homeostasis. Red blood cells transport oxygen and hydrogen ions throughout the body. White blood cells fights infections and platelets assist in blood clotting and the plasma transports the blood cells. None of these things can function without the nutrients supplied by the digestive system. Blood also maintains homeostasis of water, electrolytes and body temperature all by getting the nutrients necessary to function from the digestive system. The digestive system needs good nutrition to keep it functioning properly and all organs systems working together properly to maintain homeostasis. Undiagnosed medial conditions will cause digestive problems if left untreated and is one of the most common reasons that so many people suffer with digestive problems. Nearly everyone suffers from heartburn and indigestion now and then and these might be normal side effects of digestion, but when they occur often it might be signs of a problem and should have medical attention. Seeking medical attention or being seen by a medical doctor will help to establish if the heartburn or indigestion are from normal side effects of digestion or whether any mechanical factor such as a hiatal hernia or even silent ulcers of the esophagus, stomach, or duodenum maybe causing the digestive problems. A hiatal hernia and silent ulcers if left untreated could turn into a serious problem which can cause bleeding, pain, scarring and difficulty in swallowing and can cause a chronic condition with complications. Treatment of heart burn and prevention of its complications are almost always medical, not surgical procedures these days; and, if followed faithfully are very effective. Peptic ulcers is another serious problem that many people have and do not even know it, one might mistaken them for heartburn, indigestion and nausea. The pain and discomfort comes and goes and sometimes lasting for days or even weeks. An ulcer can be treated by medication and usually takes about eight weeks to completely heal. If left untreated it can cause internal bleeding and more severe damage that might need surgical repair (Monroe, 2000). The digestive system is a complex system. There is a lot of information that we know about this system and so much more that is still unknown. For example, for many years the American Heart Association has recommended taking aspirin to prevent heart attacks and strokes. Now, there appears to be a downside to taking a low dosage of aspirin daily. According to research taking a daily aspirin can cause serious problems in the digestive system. Research shows that people who take aspirin are at risk for excess gastro-intestinal bleeding or ulcers that perforate. So the question is does the risk balance the benefit? Through research they have found out that there are three factors that particularly affect developing gastro-intestinal complications they are the increased risk, male gender and ulcer history. All of those things are doubled when a person takes a daily low dose aspirin and the complications can be serious including death. In fact five to ten percent of people with these complications will die from it. Research has proven that the thing that is in aspirin that causes these problems is the same thing that prevents heart disease and the same prostaglandin changes are the ones that somehow enhance the probability of developing gastrointestinal irritation that can lead to bleeding, that can lead to perforation. So research has taught us that there is a high risk of developing gastro-intestinal complications including bleeding or ulcers that perforate, with the use of a low daily dosage of aspirin especially in the male gender and in those with a past history of ulcers. Through this research we still do not understand why the risk is much higher for the male gender than the female gender, that mystery is still unknown. Reasons that cause so many people to suffer with digestive problems are the lack of knowledge of how the digestive system works, poor nutrition and undiagnosed medical conditions. The most obvious solution to maintaining good health and preventing digestive problems would be getting to know the digestive tract and understanding how it works, maintaining a healthy diet and lifestyle and seek medical attention instead of letting the digestive problem turn into something much worse. How to cite The Digestive System, Papers

Analysis of Metaphor in an Area Outside of Literature free essay sample

This is because o matter how time is viewed, whether its from a negative or positive point of view, it can be agreed that time is irreplaceable. Many individuals may say time is money. These individuals may be super motivated with a willingness to always do more. Time is viewed as limited, constantly racing, chasing and cherishing all at once. It is natural for them to remain calm, cool and collected when working under pressure. These individuals put their Jobs before family and by pass lifes opportunities, In hopes of attaining their highest potential. In an essay titled Advice to a Young Tradesman,Benjamin Franklin Is accredited for this metaphor: Remember that time Is money. He that can earn ten shillings a day by his labor, and goes abroad, or sits Idle one half of that day, thought he spends but sixpence during his diversion or idleness, it ought not to be reckoned the only expense; he hath really spent or thrown away five shillings besides (Benjamin Franklin, 1748). We will write a custom essay sample on Analysis of Metaphor in an Area Outside of Literature or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page It is important to be productive dally however, it is also important not place our wealth on how productive we are. The value of money in insignificant in comparison to the value of our time.An example of widely used metaphor is is a thief in the night. Although time isnt actually stealing a direct object, It is however a representation of a thief. Time is passing with every step we take, stealing our youth, the strut in our walk, the spring in our step and then eventually life Itself. Like a thief, life will come up from behind when least expected, take what It came for, then slip away before we even realize what has happened. The Bible Is quoted as saying For yourselves know perfectly that the day of the Lord so comet has a thief in the night (1 This. 12). Just like God has given us time it is Gods determination as to when he will take it away. , the music icon, sang about time. It was metaphorically named Time after Time. Ms. States the song originated and was named after a 1979 science fiction movie about a man who invented a time machine. In the song, she is breaking up with someone, maybe her first true love. She professes her love by stating she would be there forever. Time aimlessly drifts away from the ex-lovers. While one moves forward in life, the other is left behind.Because true love never dies, the promise to rescue each other at a moments call remains. The memory of their time together surpasses all time and stays forever in their hearts. Is forever really possible? Imagine promising someone time after time, only to become aware, after some time has lapsed, the promise of being there for someone at the drop off dime Is no longer an option. Although lovers may feel all they have is time, for me personally metaphor. This metaphor can be applied to almost every aspect of life. It is very clever, yet simple and to the point.It is used as an example of taking care of issues or life problems at the onset of their inceptions will save a lot of hassle. It is a metaphor that offers sound advice. I remember often hearing this quote from my grandmother. She would use this to imply that if work was done correctly the first time around it would save time in not having to go back and do it over. Where school is concerned you can apply this metaphor to studying at the last minute; hours before the work is due or the test is given, you are more than likely to fail.To sum this metaphor, completing a task that has to be done, even though you dont want to do it, saves time n the end. Lastly, is the metaphor Time is precious. The individual who believes this metaphor does not take time for granted and always tries to accomplish what needs to be done today because tomorrow is a new day. They cherish their time because it is valuable, never missing out on lifes opportunities and live their life to the fullest. They understand no matter the length of time we live tomorrow is not promised. Time should be spent sensibly to get the most in health, Joy, love and achievement.Their motto is take time for all things: great haste makes waste, Benjamin Franklin). Perhaps the reason time is so precious is based on the fact that more of any object can always be made, but making more time is impossible. Used symbolically, metaphors on time show our connection to time, sometime making time appear odd yet alluring. When time is lost, its lost forever. Time is invaluable and the most prevailing aspect to ones life. We grow in time, live in time and then die in time. Time cannot be escaped, and defines so much for people; it causes anxiety in some and a will to do more in others. Time in itself is abstract.