Nitrogenase reduces dinitrogen at one of its iron–sulfur cores to produce ammonia by a convoluted mechanism. Now, research highlights the importance sulfur mobility on nitrogenase’s metallocofactors for nitrogen fixation.

in a novel dual bed reactor fischer-tropsch synthesis was studied by using two diffrent cobalt catalysts. an alkali-promoted cobalt catalyst was used in the first bed of a fixed-bed reactor followed by a rutenuim promoted cobalt catalyst in the second bed. the activity, product selectivity and accelerated deactivation of the system were assessed and compared with a conventional single bed react...

We analyzed the effects of gravitational unloading on muscular fatigability and the effectiveness of resistive vibration exercise to counteract these changes. Changes in knee extensor fatigability as a consequence of 8 weeks of horizontal bedrest with or without daily resistive vibration exercise were evaluated in 17 healthy male volunteers. Bedrest increased fatigability (% decrease in maximal...

A variety of mammalian species have been used in studies of epididymal function. The knowledge gained from these laboratory and domestic species has been applied to the human as well, but the anatomy and biology of the human epididymis is not commonly investigated directly. Nonpathological specimens from men within their reproductive years are understandably difficult to obtain, and even when s...

The renal proximal convoluted tubule is the primary site of water, electrolyte and nutrient reabsorption and of active secretion of selected molecules. Proteins in the apical brush-border membrane facilitate these functions and initiate some of the cellular responses to altered renal physiology. The current study uses two-dimensional liquid chromatography/mass spectrometry to compare brush bord...

INTRODUCTION Gentamicin sulphate nephrotoxicity seems to be attributed to the generation of reactive oxygen species. Olive leaf extract (OLE) has been demonstrated to have antioxidant and anti-inflammatory effects. The aim of this study was to evaluate the inhibitory effect of OLE on gentamicin-induced nephrotoxicity in rats. MATERIALS AND METHODS Thirty-five Sprague-dawley rats were divided ...