Absorption of glucose polymers from rice in oral rehydration solutions by rat small intestine.

Background: This study aims to determine the effect of replacing glucose in oral rehydration solution (ORS) with starch hydrolysates from rice on absorption in the small intestine and levels of glucose in portal venous blood and on disaccharidase levels and morphometric measurements in intestines of rats.

Methods: ORS containing standard composition of salts and 2% glucose (WHO ORS) or 2%, 5%, or 10% starch hydrolysates were infused into duodena of 60 Sprague-Dawley rats (250-350 g). Portal venous blood glucose levels were determined at 0, 30, 60, 90, and 120 minutes.

Response of black and white guinea pig skin to photodynamic treatment using 514-nm light and dihematoporphyrin ether.

Differences in skin pigmentation may significantly affect light penetration during photodynamic therapy. This study evaluated the effect of skin pigmentation on dermatotoxic reaction to photodynamic therapy utilizing the photosensitizer dihematoporphyrin ether. Black and white guinea pigs were given 10 mg/kg of dihematoporphyrin ether, depilated, and treated 48 hours after injection with 30 mW/cm2 of 514-nm light.