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 development

Text: 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 fiber

1, 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 wate

5, 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 the

fermentation of edible plant components, sum of carbohydrates and similar substances. Dissolved in water can be divided into two basic types

6, resistant starch: resistant starch include modified starches and starch on starch after heating and cooling, they will not be within the small intestine absorb

B. Physiological function of dietary fiber

Dietary 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 road

2, 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 loss

6, 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 increased