Iron absorption from three typical West African meals was measured in fourteen subjects using the extrinsic-tag technique with 59Fe and 55Fe. All meals consisted of maize as the staple food. Meals were prepared in Benin under realistic conditions from locally grown foods. Of the non-haem-Fe in the meals 39-73% did not exchange with the added inorganic radio-Fe tracer, depending on the degree of...

Accepted 29 March 2005 . . . . . . . . . . . . . . . . . . . . . . . 1.0 INTRODUCTION Optimal digestion and absorption of nutrients requires a complex interaction among motor and secretory functions of the gastrointestinal tract. Digestion of macronutrients is a prerequisite for absorption and occurs mostly via enzymatic hydrolysis. In this context, pancreatic enzymes, in particular lipase, amy...

To convert physiological requirements into dietary requirements, adjustments are needed for some nutrients that take into account certain diet- and host-related factors specific to a country or region. Nutrients whose requirements should be adjusted in this way include calcium, magnesium, iron, zinc, protein, folate, vitamin A, and carotenoids. The diet-related factors that must be considered d...

Only two (2.5%) of 80 outpatients with histologically proven ulcerative colitis had folate deficiency associated with anaemia or macrocytosis. Mean folate absorption, measured using micrograms/kg body weight of a tritium-labelled physiological folate derivative, 5-methyltetrahydroteroylglutamic acid, in six newly diagnosed patients was 76.7% (normal greater than 95%) but fell to 69.4% after thr...

Physiological digestion and absorption of nutrients within the gastrointestinal tract requires a complex interaction between motor, secretory, digestive, and absorptive functions that is vulnerable to a multitude of potential disturbances which may lead to global or specific malabsorption syndromes. Potential pathomechanisms that are illustrated in this article include insufficient mechanical b...

1 . The intestinal absorption of carnosine, glycylglycine, glycyl-D-phenylalanine, glycyl-L-phenylalanine, glycyl-L-proline and L-prolylglycine were investigated after intraluminal injection of dipeptide into anaesthetized rats. 2. With all six dipeptides, the intact substance was detected by ion-exchange chromatography in blood samples taken from the superior mesenteric vein. 3. The rate of hy...

Background: Morpholine is a toxic substance used in industry and agriculture and can be absorbed into the body through ingestion, inhalation, and the skin. The present study aimed to assess the effect of morpholine and physiological serum ingestion on qualitative and quantitative characteristics of white blood cells and kidney tissue of white male mice. Materials and Methods: In the present ...

Address correspondence to Dr. Kim, Veterans Administration Medical Center. Received for publication 2 November 1982 and in revised form 4 April 1983. INTRODUCTION The final protein digestion products presented to the small intestine are free amino acids and small peptides consisting of two to six amino acids (1-4). The processes involved in the absorption of these final products after luminal p...

mellitus. Its biological half life is 2.5 to 3 hours. Due to its short biological half life and narrow absorption window, it is incompletely absorbed in the small intestine. It is a strong base (pKa = 11.5), protonated depending on the physiological pH of the human body. It is also poorly absorbed in the colon. However, reduction of gastrointestinal motility enhances the drug absorption. Most o...

The relationship between dissociative tendencies, as measured with the Dissociative Experiences Scale and its amnesia, absorption/imaginative involvement, and depersonalization/derealization subscales, and HPA axis functioning was studied in 2 samples of undergraduate students (N = 58 and 67). Acute stress was induced by means of the Trier Social Stress Test. Subjective and physiological stress...