食品专业英语论文

Discussion on functional foods of dietary fiber班级:10食品营养与检测姓名：李勇学号：201011060113 Abstract: human society entering the 21st century, significantly improve people's living standard, increasingly fine diet, increased attention to health, a part of as a function of dietary fiber in foods, whose physiological function has been a hot food area of research, side by side as one of the functional components of health food. Function of dietary fiber in the field of nutrition is of great concern, will no doubt greater application in healthy eating and playing an important role.Key words: dietary fiber physical health functional food developmentText: nutrition of dietary fiber by 1970 the term did not appear in, is a complex mixture of collectively, is a generally difficult to digest food and nutrients. Furthermore, dietary fiber known as following the water, protein, fat, fresh water outside the compounds, minerals, cellulose "seventh nutrients". Mainly from plant cell walls containing cellulose, hemicellulose, pectin and lignin resin,A. Structure and characteristics of main components of dietary fiber1, cellulose cellulose cannot be human intestinal enzymes of the digestive tract. Cellulose is hydrophilic, role in intestinal absorption of moisture.2, hemicellulose: hemicellulose in the human large intestine than the susceptible bacteria cellulose decomposition. It has the combination of ion. Some ingredients are soluble in the hemicellulose. Most of them are not soluble hemicellulose and its physiological role is also played.3, pectin: pectin is an amorphous substance, present in fruits and vegetables in the soft tissue, can be dissolved in hot aqueous solution, acid formation of colloidal of heating in aqueous solution. Pectin also has the ability to combine with interest.4, gum: gum chemical structure due to different sources and there are differences. Main ingredient is half lying using glyoxylic acid, lactic acid, polysaccharide formed Arab glucose and mannose, it can be dispersed in wate5, wood quality: lignin is not a polysaccharide material, polymers of propylene phenyl class, with complex three dimensional structures. Because lignin is difficult to separate from the cellulose in the cell walls, which include the lignin component of dietary fiber. People and animals can't digest. Victoria is a human intestinal digestion and absorption resistance, and in the human large intestine part or all of thefermentation of edible plant components, sum of carbohydrates and similar substances. Dissolved in water can be divided into two basic types6, resistant starch: resistant starch include modified starches and starch on starch after heating and cooling, they will not be within the small intestine absorbB. Physiological function of dietary fiberDietary fiber cannot be human digestion and absorption, but important physiological role of dietary fiber in the body, is a class of nutrients essential to maintain human health. Because of dietary fiber in human gastrointestinal disease prevention and maintenance of gastrointestinal health feature highlights, hence "intestinal cleaning" in the world.1, and dietary fiber of suction water dissolved expansion performance conducive to increased food minced of volume, stimulate gastrointestinal road of Peristaltic, and softened stool, prevent constipation, promoting row will and increased will times, up to a guide release of role, reduced stool in intestinal in the of stagnation time and the stool in the harmful material and intestinal of contact, maintained intestinal clean, to reduced and prevention gastrointestinal road2, dietary fiber can inhibit the absorption of cholesterol, prevention of hyperlipidemia and hypertension.3, dietary fiber can delay and reduce the absorption of heavy metals and other harmful substances, reduction and prevention of the toxic effects of harmful chemicals on the human body.4, Dietary fiber can improve the intestinal flora to maintain the ecological balance of the body's micro favor the synthesis of certain nutrients.5, soluble dietary fiber has a strong suction swelling properties, expansion after absorbing water to increase the volume and weight of 10 to 15 times, both to increase people's sense of satiety, but also reduce the absorption of dietary fat, reducing dietary fat heat ratio, relative to control and reduce total dietary energy, avoid heat surplus and lead to excessive accumulation of body fat, can solve the problem of fullness without starving, but also to achieve the purpose of weight control weight loss6, scientific discovery, the sharp rise in postprandial blood glucose control and improve glucose tolerance in terms of the effect of soluble dietary fiber. Dietary fiber can slow the absorption of glucose, postponed digestible carbohydrates such as starch digestion, avoid the sharp rise in blood sugar after meals, dietary fiber increasedsensitivity to insulin, but also directly affect the islet a-cell function, improve insulin in the blood regulation, improve the body's level of glucose tolerance, and conducive to treatment and rehabilitation of diabetes. The studies show that adequate dietary fiber content of the diet, either in the prevention or in the treatment of diabetes has special effects.C Dietary fiber trendsDietary fiber is just getting started in our applied research, basic research is relatively weak, and applied research at a relatively low level, therefore, the research on dietary fiber to be moving in the following directions:1 . Dietary fiber to strengthen the basic research for 20 years, the study of the dietary fiber in China are mainly concentrated in the preparation of dietary fiber, some basic research is relatively weak, such as dietary fiber modified detection analysis of dietary fiber, dietary fiber physiologicalthe function mechanism studies, research in this area to be strengthened.2. Strengthen the study of the sources of dietary fiber source of dietary fiber, stems largely from wheat, soybeans, sugar cane, Jerusalem artichoke, guar gum, In China, in addition to many food crops have not been fully developed application,targeted to strengthen the study of the sources of dietary fiber, will have a very important role in promoting the development of China's food industry.D. EpilogueWith the deepening of the understanding of the relationship of dietary fiber and human health, a number of high-fiber foods increasingly favored by the general public, we have reason to believe that dietary fiber will become one of the nutrients of the 21st century's most developed force.【References】[1] "dietary fiber in food processing and research progress[2] "dietary fiber in food[3] of dietary fiber and its physiological function[4] Food and Health[5] How to eat the most secure[6] Food and Nutrition[7] Psychology and healthy eating[8] The human body needs nutrition[9] Standards of food hygiene and healthy eating。