INTRODUCTION Even though dehydration could aggravate formation of urinary calculi, the effects of fluid and food restriction on calculus formation is not thoroughly defined. The purpose of this study is to evaluate the effects of fluid and food restriction in Ramadan fasting on urinary factors in kidney and urinary calculus formation. MATERIALS AND METHODS Fifty-seven men aged 30 to 55 years ...

Recent human population increase has been enabled by a massive expansion of global agricultural production. A key component of this "Green Revolution" has been application of inorganic fertilizers to produce and maintain high crop yields. However, the long-term sustainability of these practices is unclear given the eutrophying effects of fertilizer runoff as well as the reliance of fertilizer p...

The local atomic structure of habit-modifying transition metal cations within the crystal lattice of potassium dihydrogen phosphate (KDP) is investigated using X-ray absorption spectroscopy (XAS) and X-ray standing wave (XSW) spectroscopy, together with molecular modeling. XAS reveals the transition metal cations to be structurally incorporated into the crystal lattice as an ionic complex that ...

1. Sheep-, rabbit- and ox-muscle minces prepared soon after slaughter were diluted with 1 vol. of 0.16 m-potassium chloride in the absence (potassium chloride mince) and presence of added cofactor or glycolysable substrate, and the effects on the ultimate pH were examined. 2. Changes in the concentrations of glycogen and lactate and the concentrations of some phosphorus-containing fractions wer...

Jeener and Brachet (1) found that the absorption of inorganic phosphate by bakers’ yeast is greatly enhanced when the incubation of the yeast in a phosphate-containing nutrient (period of P absorption) is preceded by a period of incubation in a medium devoid of phosphate (period of P starvation). The Belgian authors had already demonstrated that a large part of the absorbed phosphate appears in...

The action of partially purified L-threonine dehydratase of sheep liver on L-serine has been studied. This enzyme acts on L-serlne as a substrate but is rapidly inactivated in the process, partially at pH 8.9 and more completely at pH 7.2. However, incubation at pH 8.9, with or without L-threonine, leads to a gradual restoration of up to 90% of the original activity. The addition of pyridoxal p...

A facile method is developed to synthesize intrinsically fluorescent carbon dots by hydrothermal treatment of glucose in the presence of monopotassium phosphate. The fluorescence emission of the carbon dots thus produced is tunable by simply adjusting the concentration of monopotassium phosphate.

The influences of glucose, phosphate, magnesium and potassium concentration on growth rate and maximum population density were studied. From the data obtained the growth yields for glucose and phosphorus were found to be 2-4x10* cells (i.e. 0-76 mg dry weight)/mg glucose and 2-2 x io (i.e. 69 /ig dry weight)//ig P. The growth response to magnesium and potassium was complex since there were thre...

Background: In Algeria the date wastes production is estimated at least 85.000 tones. Date wastes is an economic source of carbohydrates for conversion to industrial enzymes because it is readily available and relatively low priced. Objective: The aim of the present study was to investigate the potential of using date wastes as a substrate for the production of a-amylase and invertase. Materia...