The rate of unidirectional [14C]urea efflux from human red cells was determined in the self-exchange and net efflux modes with the continuous flow tube method. Self-exchange flux was saturable and followed simple Michaelis-Menten kinetics. At 38 degrees C the maximal self-exchange flux was 1.3 X 10(-7) mol cm-2 s-1, and the urea concentration for half-maximal flux, K1/2, was 396 mM. At 25 degre...

Thiamine is a water-soluble essential micronutrient, and grains are the main source of thiamine in human diet. Refining processes reduce content; therefore, many flours enriched with thiamine. Further processes, such as heating (baking), destabilize In doughs, partitions into aqueous phase (dough liquor). The objective this study was to document temperature effects on degradation reaction kinet...

This study was carried out with the cooperation of farmers owning communally grazed indigenous goats in southwestern KwaZulu-Natal Province, South Africa, where farmers had identified poor reproductive performance in their herds as one of their major problems. The aim was to quantify the effects of 3 interventions and the interaction between these interventions on goat productivity and gastroin...

The objective of this study was to investigate the effects of adding different levels of molasses (1-5%) on the silage quality, in vitro methane production and in vitro organic matter digestibility (IVOMD) of pistachio (Pistachio vera) by-product and wheat straw mixture silages. For this purpose, silages were prepared with pistachio by-product (85%) and wheat straw (15%) without molasses (contr...

Orange peel molasses, a byproduct of juice production, contains high concentrations of phenols, including numerous flavanone and flavone glycosides, polymethoxylated flavones, hydroxycinnamates, and other miscellaneous phenolic glycosides and amines. Extensive fractionation of these phenols was achieved by adsorption, ion exchange, and size exclusion chromatography. Size exclusion chromatograph...

three samples were collected over an eight hour period on August 25, 2005 and combined into one composite sample. Raw green liquor was a two-sample composite because of a change that occurred in recovery boiler operation. Lime rock was a composite sample collected May 19, 2005. Pulp production on August 25, 2005 was 565 ADT. Results are given in Tables I and II. Samples for the mill trial were ...