Hyaluronate stimulated the formation of exolipase by Serratia marcescens. This ability was abolished when all carboxyl groups of hyaluronate were methyl esterified. Additional studies suggested that the biological inactivity of esterified hyaluronate should be ascribed to the reduced conformational order of the molecules rather than to their electroneutrality.

Methods 1. Determination of Free and Esterified Vitamin A in Blood Plasma The Fujita method (1) using alumina chromatography for separating vita min A alcohol from esterified form and measuring photometrically with the glycerol dichlorohydrin method, was employed. 2. Determination of Vitamin A Content of Feces The improved method of Fujita (2) for eliminating non-vitamin A sub stances in feces,...

Cell walls of grasses have two major polysaccharides that contain uronic acids, the hemicellulosic glucuronoarabinoxylans and the galactosyluronic acid-rich pectins. A technique whereby esterified uronic acid carboxyl groups are reduced selectively to yield their respective 6,6-dideuterio neutral sugars was used to determine the extent of esterification and changes in esterification of these tw...

In contrast to UCP1, the primary function of UCP3 is not the dissipation of energy. Rather, several lines of evidence suggest that UCP3 is related to cellular long-chain fatty acid homeostasis. If long-chain fatty acids enter the mitochondrial matrix in their non-esterified form, they cannot be metabolized and may exert deleterious effects. To test the feasibility that UCP3 exports fatty acid a...

Background and objectives: Melasma is one of the most common pigmentary disorders. It has a considerable impact on quality of life. The treatment of melasma has still remained a challenge because the efficient treatment has not been proven until now and there is still a need to find new depigmenting products.Allium cepa L. and Cucumis melo L. seeds as well as ...

Plant cell walls and their polymers are regulated during plant development, but the specific roles of their molecular components are still unclear, as well as the functional meaning of wall changes in different cell types and processes. In this work the in situ analysis of the distribution of different cell wall components was performed during two developmental programmes, gametophytic pollen d...

The occurrence of a negative energy balance (NEB) and concurrent metabolic changes may be responsible for impaired reproductive performance. A characteristic metabolic feature of NEB is the mobilization of body fat, reflected in an increased plasma non-esterified fatty acids (NEFA) concentration. High plasma concentration of NEFA is reflected in elevated NEFA follicular concentrations. The aim ...