Determination of crude fiber

Determination of crude fiber Dietary fiber can be defined as sum of polysaccharides and lignin that are not digested by human digestive enzymes. The major components of dietary fiber are cellulose, noncellulose such as hemicelluloses and pectin, lignin, and hydrocolloids (gums, mucilages, and algal polysaccharides). Human foodstuffs contain mainly noncellulose polysaccharides, some cellulose and little lignin. The average proportions of noncelluloe polysaccharides. Cellulose and lignin for common foodstuff are about 70%, 20% and 10% respectively(Laura and other 2003). The crude fiber method was developed in the 1850s to estimate indigestible carbohydrate in animal feeds. Since an easy alternative was not available, fiber in human foods was measured as crude fiber until the early 1970s (except for Southgate in England). Crude fiber method is one of the gravimetric method that measures the organic food residue remaining after sequential digestion with 0.255N sulphuric acid and 0.313N sodium hydroxide solutions, followed by oven-drying at 104 ºC overnight and ignition in muffle furnace at 600 ºC for 3 hours. The compounds removed are predominantly protein, sugar, starch, lipids and portions of both the structural carbohydrates and lignin. Crude fiber method measures variable amounts of the cellulose and lignin in the sample, but hemicelluloses, pectins, and added gums or hydrocolloids are solubilised and removed. Therefore, crude fibre measurement drastically underestimates dietary fibre in foods since it measures only cellulose and lignin. As a result, crude fiber method is only adequate for determination of fiber in animal feed product, but not suitable for human food analysis as lignin is significant to human health (James N.BeMiller 2003) Determination of carbohydrate Carbohydrates are important in food because carbohydrates provide energy, enhance immune function and support cellular communications. Carbohydrates are converted into energy to allow our cells to function. There are two major types of carbohydrates such as complex carbohydrates and simple carbohydrates. Complex carbohydrates are glycogen in human tissue and cellulose in plant tissues. Simple carbohydrates are monosaccharide such as glucose, fructose, galactose and disaccharides like maltose, lactose and sucrose (DeWayne McCulley 2005). The most important sources of carbohydrates are plant food such as fruits, vegetables and grains. Milk and milk products contain the carbohydrates lactose (milk sugar) but meat, fish and poultry have no carbohydrate at all. One gram of carbohydrates has four calories. To find the number of calories from the carbohydrates in a serving, multiply the number of grams of carbohydrates by four. For example, one whole bagel has about 38 grams of carbohydrates, equal to about 152 calories (Carol Ann Rinzler 2006). The determination of carbohydrates is one of the most frequently required analyses in the food analysis laboratory and has considerable application in nutritional and biochemical studies. The variety of food and beverage products from food manufacturers continues to expand. This variety, combines with raised expectations of quality and consistency from the consumer, has created a need for analytical methods that provide specific data on the composition of both raw materials and final products. Analyses for carbohydrates must be applicable to simple ingredients, complex processed foods, and fractions or components isolated in nutritional studies. (Eliasson, 2006) There are several methods of carbohydrate analysis and can be divided into physical methods and chemical method. Physical methods generally determined some overall features of the sugars in food such as total carbohydrates. The physical methods include refractometry, polarimetry and hydrometry. Unlike physical methods, chemical methods are able to determined more specific features, for example, reducing sugar. In this experiment, carbohydrates in foods were determined by difference after knowing the content of other food components. The accuracy of the à ¢Ã¢â€š ¬Ã…“by differenceà ¢Ã¢â€š ¬Ã‚  method depends on the determination of other food components and does not make any distinction between the available and nonavailable carbohydrates. The advantage of this method is carbohydrates content can be calculated without carry out an experiment (Nollet 2004). Determination of Vitamin C Ascorbic acid (vitamin C) which forms cementing substance such as collagen in the body is important in wound healing and increasing resistance to infections. This vitamin also enhances the absorption of non-heme iron and may protect against some cancers and cardiovascular disease. Milk contains only a small amount of ascorbic acid (0.94 mg per 100g milk). Processing or exposure to heat such as pasteurization reduces the vitamin C content of milk. The current RDA for vitamin C for most adults is 60mg per day (Gregory and others 1999). Besides, pregnant women need a moderate increased for vitamin C during last trimester to meet the needs of the growing fetus. The vitamin C content in food is strongly influenced by length of time on the shelf and in the storage and cooking practice likes the heating and exposure to copper or iron or to mildly alkaline conditions destroys the vitamin (World Health Organization 1998). The AOAC method for determining vitamin C in food is based upon the reduction of the dye 2, 6-dichlorophenolindophenol (DCPIP) with ascorbic acid in an acid solution. DCPIP is used as the titrant because it only oxidizes ascorbic acid and not other substances that might be present. Besides, it acts as a self-indicator in the titration because it changes to another color when in excess analyte (ascorbic acid). In the oxidized form, DCPIP is purplish-blue in neutral or alkaline solution, and pink in acid solution; the reduced form of dye is colorless. The solution will remain colorless as more DCPIP is added until all of the ascorbic acid has reacted. As soon as the next drop of DCPIP solution is added at the solution and the solution is turn to light red or pink due to the excess DCPIP, the end point of the titration is reached. Hence, the ascorbic acid is oxidized to dehydroascorbic acid by DCPIP solution. However, this method is not capable of determining dehydroascorbic acid conten t that presents more or less 80% of vitamin C activity shown by ascorbic acid. The diagram below show the reaction between ascorbic acid and 2, 6-dichloroindophenol (DCPIP). (Ball 1997) Redox reaction between ascorbic acid (vitamin C) and 2, 6-dichlorophenolindophenol (DCPIP). Before using DCPIP to quantitatively measure vitamin C, the concentration of the DCPIP solution must be known. The concentration of DCPIP solution can be determined by react the DCPIP solution with a solution of ascorbic acid with a known concentration. This is known as à ¢Ã¢â€š ¬Ã…“standardizingà ¢Ã¢â€š ¬Ã‚  the solution and it must be done before determine the concentration of vitamin C of sample. The vitamin is very susceptible to oxidative deterioration, which is enhanced by high pH and by the presence of ferric and cupric ions. For this reason, the entire analytical procedure needs to be performed at low pH and in the presence of a chelating agent if necessary. (Ronald and Landen 2003) For example, ascorbic acid is extracted from food and titrated with the indicator in the presence of acid like oxalic acid. These acids are used to preserve the correct acidity for reaction and to avoid auto oxidation of ascorbic acid. 1. James N.BeMiller. 2003. Carbohydrate Analysis. In: S. Suzanne Nielsen. Food Analysis. 3rd ed. New York: Kluwer Academic/Plenum Publishers. p144-169. 2. Laura E. Matarese, Michele M. Gottschlich. 2003. Contemporary nutrition support practice: a clinical guide. 2nd ed. USA: Saunders. 173-175p. 3. Carol Ann Rinzler. 2006. Nutrition for Dummies. 4th ed. USA: Wiley Publishing. 102p. 4. DeWayne McCulley. 2005. Death to Diabetes: The Six Stages of Type 2 Diabetes Control Reversal. South Carolina: BookSurge. 56p. 5. 3. Ann-Charlotte Eliasson. 2006. Carbohydrates in food. 2nd Edition. USA: CRC Press. 2-3p. 6. Handbook of Food Analysis: Physical Characterization and Nutrient Analysis. 2nd ed. USA: Marcel Dekker, Inc. 387-393p. 7. G. F. M. Ball. 1997. Bioavailability and analysis of vitamins in foods. United Kingdom: Chapman Hall. 521-523 p. 8. Gregory D. Miller, Judith K. Jarvis, Lois D. McBean. 1999. Handbook of dairy foods and nutrition. 2nd ed.USA: CRC Press. 24p 9. World Health Organization. 1998. Vitamin and mineral requirements in human nutrition. China: Sun Fung. 135-137p. 10. Ronald R.E and W.O.Landen, Jr, 1999. Vitamin Analysis. In: S. Suzanne Nielsen. Food Analysis. 3rd edition. New York: Kluwer Academic/Plenum Publishers. New York. p 182.

Go Ask Alice Analysis Paper Essay

In the book Go Ask Alice (1971) By an Anonymous author, a teenager struggling with drugs tragically succumbs to her problems. There has been a lot of Controversy revolving around whether the author is real or if this book was just written to draw attention to drugs. Regardless of whether the supposed author actually existed, the fact that remains is that identity issues and drug addiction are very real problems for millions of teenagers. In the beginning of the book a teenage girl talks about herself and how she wants to change her image. She describes very adamantly that she is unhappy with her body and her own personality. â€Å"I want to be someone important, maybe the new me will be different† (page 4). Many Teenagers have an identity crisis, some more drastically than others. The task of being confident isn’t an easy one; teens seem to always want to be someone better. But by focusing only on the thought of becoming advanced instead improving what is already good, it causes a stalemate. The mind wants to improve but all it does is think about ameliorating, the actual action that must be taken never happens. This is what the girl in the book goes through, she is always thinking about becoming better, but as she finally starts to improve and stop just thinking about it, she accumulates a mindset of becoming better. Now this girl has a constants need to be progressive, giving her no true identity except the thought of wanting a better one. Later in the book the young girl runs away from her home and makes a new life for herself in California. She acquires a job at a department store and after a few days of working the owner of the store invites her to a party at her loft. While at the party the girl is exposed to drugs, she had been trying to stay away from the demon pills, but it didn’t work. â€Å"One of the men passed me a joint and that was it. I wanted to be ripped, smashed, torn up as I had never wanted anything before. This was the scene, and I wanted to be part of it† (page 76). This girl was exposed to drugs without her knowledge but after being exposed she needed the high. She sought out the pills. After finally getting clean she is exposed again, while she could have rejected the ‘joint’ she isn’t confident enough in herself to do so in front of others. Her uncertainty allows her judgment to be influenced, which makes her addiction grow vigorously. Teenagers of this age see drugs as a way to escape from their problems. Which is half the predicament with this generation, we are all about avoiding issues rather then facing them head on.

Pros And Cons Of The Minimum Wage - 1620 Words

Increasing the federal minimum wage has been a controversial topic around the United States; many people are in favor of raising the minimum wage, while others heavily oppose the idea. While everyone is entitled to their own opinion, statistics have shown that the minimum wage is closely correlated to public health, and it shows that this topic is a much bigger and broader picture than simply economics. The federal minimum wage has a history that dates all the way back to 1938, and the strong debates and opinions surrounding it still continue to this day. (ProCon.org, 2016) Like any health policy issue, there are both pros and cons to the issue, and there are also different aspects and perspectives to look at when it comes to both the†¦show more content†¦J. Paul Leigh, the author of â€Å"Could Raising the Minimum Wage Improve the Public’s Health† from the American Journal of Public Health, states, â€Å"Rarely, if ever, do debates mention public health. But all these factors - poverty through income inequality - are widely researched in the Social Determinants of Health literature.† Leigh says that while there are a tremendous number of studies conducted by economists across the nation, very few even consider health as an aspect to include in their research. (Leigh, 2016) Many people assume that minimum wage workers are young teenagers that want to earn a little extra money to become more independent and purchase items that they want, however, that is not the case. In reality, a whopping 80 percent of minimum wage workers are over the age of 20 years old, with the average age being 35 years old, according to the United States Bureau of Labor Statistics. Many minimum wage workers are also the main providers of their families, with 28 percent of minimum wage workers having children. In addition to these statistics, children born into low-income families are 40 percent more likely to have asthma and four times as likely to drop out of high school. Babies are also twice as likely to have a low birthweight.Show MoreRelatedThe Pros And Cons Of Minimum Wage994 Words   |  4 PagesThe idea of the minimum wage is that workers are guaranteed enough money to improve their standard of living. The price of the minimum wage is determined by the state, but a feder al minimum wage is set. Some states choose to go above the minimum wage, while others, such as Alabama and Louisiana, choose to not have a minimum wage at all (Root). The minimum wage is important to society, because it can affect many people’s lives. There are many pros and cons to having a minimum wage in the United StatesRead MoreThe Pros And Cons Of The Minimum Wage769 Words   |  4 PagesDid you know minimum wage was $0.25 per hour in 1938? Since then it has raised to a whopping $7.25. Most readers will agree that there is a problem with this current minimum wage, considering the cost of living and salaries, Etc. However, they might not understand the complexity of the issue. In fact, the topic is not simply a question of if the minimum wage should be increased or kept the same, but more of a complex issue involving the different viewpoints on why people agree or disagree. Some reasonsRead MorePros And Cons Of Minimum Wage991 Words   |  4 PagesA minimum wage is the lowest remuneration that employers must legally pay their workers for their services. It is an example of a price floor below which workers may not wish to sell their labour legally. The purpose of minimum wages is to protect workers against low pay. They help ensure an equitable share of profits and a minimum living wage to all who are employed. Minimum wage can also be one element of a policy to overcome poverty and reduce inequality, including those between men and womenRead MorePros And Cons Of The Minimum Wage1755 Words   |  8 PagesMinimum Wage: The Pros and Cons Looking back over the last century, minimum wage has been a divisive subject among policy makers and economists in the United States. As far back as 1938 when the Fair Labor Standards Act (FLSA) was first introduced, minimum wage has been a contentious issue. After much judicial opposition, President Franklin D. Roosevelt signed into law a bill which was a landmark in the nation’s social and economic development. The bill banned oppressive child labor, set the minimumRead MoreEssay on Pros and Cons of Minimum Wage701 Words   |  3 PagesPros and Cons of Minimum Wage The argument for minimum wage has remained remake consistent over the years. Some people are against minimum wage and the other think minimum wage can help you in a certain way. In the midst of the Great Depression, the Unites States federal government passed the Fair Labor Standards Act. The law has been amended almost every year to expand coverage of the wage floor and to increase the wage itself. Many of the fifty states have enacted their own minimum wage lawsRead MoreThe Pros and Cons of Abolishing Minimum Wage954 Words   |  4 PagesAbolishing Minimum Wage Increase, decrease or abolish minimum wage; which is best for our citizens and our economy? Minimum wage was implemented to help unskilled workers to make a living wage but as time goes on the value of minimum wage has plummet. In my research paper I will provide knowledge about minimum wage such as the history, purpose, benefits and the results. I will also present the pros and cons of abolishing the minimum wage and the increase/decrease of minimum. The minimum wage was originallyRead MorePros And Cons Of Raising The Minimum Wage1908 Words   |  8 PagesTai K. Lamar Jennifer Chicosky ENG-111-IN1 07/21/17 Raising the Minimum Wage from $7.25 Can you live off $7.25 an hour? Would you be able to pay all your bills, and have plenty of money left over for food, as well as personal pleasures? Imagine your salary was cut down to a forty-hour work week at the minimum wage salary in your state. Can you save money while on a minimum wage hourly salary? These same questions are on the minds of many Americans that are currently facing these struggles every timeRead MorePros and Cons of Raising a Minimum Wage Essay1126 Words   |  5 PagesMinimum Wage A minimum wage is the lowest hourly wage that employers have to compensate the workers for their service. Currently the federal minimum wage is $7.25 per hour. However, many states also have their own minimum wage laws. In those instances, the employee is entitled to the higher of the two minimum wages. In this paper we will discuss the brief history of the minimum wage law and its current legislation. We will also analyze the pros and cons of raising the minimum wage, and theRead MoreThe Pros And Cons Of Raising The Minimum Wage993 Words   |  4 PagesAlthough it is not a new topic in America, the decision to raise the minimum wage continues to be controversial, especially in the political realm. The political parties still move to block the opposing party from successfully implanting their ideals, causing either nothing to be accomplished or the situation to worsen. Research shows that raising the minimum wage a reasonable amount would lessen the gap between the rich and th e poor, continue to fulfill its original purpose of protecting workersRead MoreEssay on Pros and Cons of Raising the Minimum Wage1156 Words   |  5 PagesPros and Cons of Raising the Minimum Wage When you picture a minimum wage worker, who do you picture? Do you see a sixteen year old, a middle-aged mother, a college graduate, or even a senior citizen worker? In September of 2013, California governor Jerry Brown signed a new bill into act that would cause the California minimum wage to rise from the current $8.00 and hour to $10.00 and hour in increments over the next three years. The minimum wage rate will go up in two separate $1.00 boosts.

Graduation Speech High School - 922 Words

As a freshman in high school, school was my least favorite place to be and I also dislike going to class. My grades were inadequate by the time I was a sophomore. Toward the end of my sophomore year I met Dawn Pollman Kivlehan who is a teacher at Fowler High School. She is the head of the ESL (English as a Second Language) department. Mrs. Kivlehan was born and raised in Syracuse, New York and lived in a neighborhood called Tipperary Hill. She enjoyed in spending time with her family, listening to music and watching Fowler soccer. She had a bad habit of drinking Diet Pepsi every morning. I remember every morning she drinks Pepsi. She played field hockey in college and basketball in her early age. Her eyes changes color depending on the clothes she wears and, then green when she’s upset. Mrs. Dawn is fashionable during the week she always dressed up except Fridays. Friday she wears her soccer t-shirts. (She really loves wearing sweatpants after work). Dawn Pollman Kivlehan is h ardworking, helpful, and very beloved teacher. (I can really say that she is one of the hardest working person I know) Dawn is one of most hard working persons that I know, not just in school, but also at home where there’s three kids she take care of. She encourages students to stay with her or other teacher after school for extra help. Some of the other teachers usually leaves right after school because they have kids, but my teacher Dawn always stays. She also created a website for all ESL studentsShow MoreRelatedGraduation Speech : High School934 Words   |  4 Pageslife would be graduation. For many people, graduating from high school is an objective. It takes a lot of time, effort, and determination to accomplish that goal. For others graduation is the end of high school, and the beginning of a new chapter in life. When graduated people feel as if adulthood has begun. In the long run, graduating opens a lot of opportunities for people to thrive. I can almost reminisce the day as if it was yesterday. I was sitting in bed like any other school day. It seemedRead MoreGraduation Speech : High School852 Words   |  4 PagesAccording to a report from Thomas Nelson Community College website, 15.7 percent is the graduation rate in 2010. 84 percent of students failed to receive their degree. That’s beyond sad. College can be difficulty especially with everyday life is getting harder to main family life work and financials. Because college is challenging, I know that I have issues that I must overcome. I told myself the more patient s I have the better success I will have. Although college will be difficult my goal isRead MoreGraduation Speech : High School Essay2254 Words   |  10 Pages The day I graduated from high school The High school graduation day is a life full of journeys for everyone, high school life is a memorable time for most people, for me as well. 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When choosing what college or university to attend it may be tempting to want to go to a school thatRead MoreGraduation Speech : High School Graduation1507 Words   |  7 PagesForest English 1010 9/9/2014 Graduation During our lives, most of us have hated getting up early. Whether we as humans enjoy mornings or not, we’re always looking forward to that unforgettable day. That special is high school graduation for me. Graduation is a ceremony that recognizes students that have excelled through school. Graduation was one of the best days of my life, perhaps even better than the day that I started college. There is no other day like graduation where there comes this feelingRead MoreGraduation Speech : High School Graduation933 Words   |  4 PagesHigh School Graduation With regards to high school graduation, Balfanz, Herzog, and Iver (2007) followed 12,972 Philadelphia students enrolled in traditional middle schools from six grade (1996-1997) until 1 year beyond their expected graduation from high school (2003-2004) in order to understand what indicators would affect their projected graduation date. Unlike many of the early K-8 schools, the population Balfanz et al followed consisted of 64% African American, 19% White, 12% Hispanic,Read MoreGraduation Speech On High School Graduation851 Words   |  4 PagesThere Is No Success Without The Opportunity to Fail High School graduation can be an exciting time in a student’s life. It is a time when they begin to experience the kind of freedom that comes along with growing up. This freedom allows students to choose the type of college or University they would like to attend. It is necessary that they understand how responsible they need to be with the freedom that is being offered to them. When choosing what college or university they would like toRead MoreGraduation Speech : High School997 Words   |  4 Pagesup, I loved going to school and dreamed of one day attending college. Attending school every day and receiving good grades had become my top priority from K-12. I excelled from K-8th grade, but entering into high school was completely different than primary school. The atmosphere and environment was new to me, I was free to roam the halls or walk back out the door without any repercussions. This began my downward spiral in high school. My freshman year was by far the best school year for me becauseRead MoreGraduation Speech : High School897 Words   |  4 PagesHigh school was one of the most challenging moments in my life. Not only did I have to deal with the academic pressures and social issues from my peers I had external factors that were heavily impacting me as well. During my junior year my mom separated from her husband and me and my three little brothe rs ended up staying house to house with close relatives. Shortly after that time at the beginning of my senior year, my mom was sent to prison. In the midst of dealing with all of the demands thatRead MoreGraduation Speech : High School Essay1434 Words   |  6 PagesWhen I was in high school I had one goal, I would graduate top of my class and go to the University of Florida for pre-medicine, then onto their medical school. I never considered that I would want anything else, so I went to a specialty high school that would allow me to specialize in Biomedical sciences(STEM) and never even thought about the possibility of a life other than the one I had so precisely planned out for myself. When my nephews were born my sophomore year all of my priorities changed