INTRODUCTION A decrease in the liver catalase activity in tumor-bearing rats was reported by Greenstein and collaborators in 1941 (1). Since the appear ance of this early report, the same authors have investigated the effects of a relatively large num ber of different tumors upon liver catalase activity in rats and mice (2-5). These studies have shown that the decrease in activity of the liver ...

Research on physical activity and fitness indicates their importance in the prevention of disease and promotion of health. However, levels of physical activity have been shown to vary significantly by age, sex and a wide range of additional factors. This paper examines age and sex differences in physical inactivity among 13 to 19 year olds participating in the 1990 Ontario Health Survey. Findin...

Thirty years ago we reported that erythrocyte pyridoxal kinase activity of African-Americans was strikingly lower than that of persons with European ancestry in a tissue-specific manner. At the time, it was impossible to elucidate the mechanism by which evolution had selectively lowered the enzyme activity in one cell type but not in others. We have now identified a promoter mutation with poten...

BACKGROUND Pyrethroids are potentially harmful to human health and ecosystems. It is necessary to develop some efficient strategies to degrade pyrethroid residues. Biodegradation is generally considered as a safe, efficient, and inexpensive way to eliminate environmental contaminants. To date, although several pyrethroid-hydrolyzing esterases have been cloned, there has been no report about a p...

Sleep-like states are characterized by massively reduced behavioral activity. Little is known about genetic control of sleep-like behavior. It is also not clear how general activity levels during wake-like behavior influence activity levels during sleep-like behavior. Mutations that increase wake-like activity are generally believed to also increase activity during sleep-like behavior and mutat...

RIC-3 is a member of a conserved family of proteins that affect nicotinic acetylcholine receptor maturation. In yeast and in vitro, BATH-42, a BTB- and MATH-domain-containing protein, interacts with RIC-3. BATH-42 is also known to interact with the CUL-3 ubiquitin ligase complex. Loss of BATH-42 function leads to increased RIC-3 expression and decreased activity of nicotinic acetylcholine recep...

About 25 isolates were recovered from different soil samples collected from different field nearer to Ravulapalem village, East Godavari district, Andhra Pradesh, India. On the basis of colony size, texture, and microscopic characteristics, the isolates were categorized into 10types. Among these, five isolates showed good proteolysis activity, three isolates showed moderate activity, 2isolates ...

Soil organic carbon (SOC) sequestration with enhanced stable carbon storage has been widely accepted as a very important ecosystem property. Yet, the link between carbon stability and bio-activity for ecosystem functioning with OC accumulation in field soils has not been characterized. We assessed the changes in microbial activity versus carbon stability along a paddy soil chronosequence shifti...

Aspen (Populus tremuloides Michx.) leaf extracts contain a newly discovered enzyme activity that catalyzes the magnesium ion-dependent elimination of diphosphate from dimethylallyl diphosphate with rearrangement to form isoprene (2-methyl, 1-3-butadiene). This isoprene synthase activity has been partially purified. The nonenzymatic reaction of dimethylallyl diphosphate to isoprene, known to be ...

Background: Protective effect of Emblica against radiation and cadmium induced biochemical changes in mouse kidney has been studied. Materials and Methods: Adult male mice were divided into seven groups: I (shamirradiated), II (cadmium chloride), III (irradiated with 2 Gy gamma rays), IV (radiation and cadmium chloride), V (Cadmium chloride and Emblica), VI (radiation and Emblica), VII...