Duodenal Material

FAduo is the duodenal flow of fatty acids (% dry matter intake) and FAfeed is the fatty acids content in the feed materials (% dry matter intake). The intestinal digestibility of fatty acids was assumed to be 75%. 

As fatty material, usually in the form of triglycerides, enters the intestine it is emulsified by muscular action of the duodenal wall which also causes the secretion of pancreatic enzymes that hydrolyze the triglycerides to produce fatty acids and 2-monoglycerides (Fig. 16.3c). At the same time the gallbladder releases bile acids into the intestine that, in combination with lecithin already present and the 2-monoglycerides (also a weak surfactant) produced by hydrolysis form mixed micelles that solubilize the essentially insoluble fatty acids. 

Dietary fibre is a beneficial material for constipation, gastric and duodenal ulcers, haemorrhoids, rectum and colon (colorectal) cancer, commonly known as bowel cancer, and other diseases. Eating foods high in fibre is recommended for the modulation of glucose levels in blood serum and in some forms of diabetes (especially type 2 diabetes). This also has the effect of reducing serum cholesterol level, and can thus help to prevent cardiovascular diseases. The effect is explained by the reduced absorption of cholesterol from viscous foods and by cholesterol binding to fibre. 

Fig. 7.34. Upper gastrointestinal series with water-soluble contrast material obtained 4 weeks after intestinal transplantation in 39-year-old man with short-bowel syndrome. Image shows proximal intestinal side-to-end anastomosis (between arrows) between recipient duodenum and donor jejunum, (d donor, D duodenum,/jejunum, r recipient, ST stomach.) Annotations recipient duodenal stump (asterisk), proximal intestinal anastomosis (between arrows), gastric tube (arrowhead)...

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