sediment-related environmental problems pose a serious threat to sustainable land management in many developing countries, including iran. information regarding sediment sources represents a key requirement from the management perspective since identification of sediment sources is a precursor to the design of effective sediment management and control strategies. the fingerprinting approach has...

We used the Hedley sequential fractionation scheme to assess phosphorus (P) chemistry of a strongly weathered soil from a humid lowland forest in Panama. Our analyses were part of a factorial experiment of nitrogen, P, and potassium addition, with nutrients added annually, i.e. a chronic input. The aim was to examine changes in soil P chemistry with 7 years of nutrient addition for soils collec...

Several studies have suggested an important role of miR-291b-3p in the development of embryonic stem cells. In previous study, we found that the expression of miR-291b-3p was significantly upregulated in the liver of db/db mice. However, the role of miR-291b-3p in glucose metabolism and its underlying mechanisms remain unknown. In the present study, we demonstrated that miR-291b-3p was abundant...

Farmyard manure, an amendment traditionally used for improving the fertility of sandy soils in arid climates, is becoming scarce and expensive. Its shortage makes it necessary to evaluate, at field scale, suitability medium-term performance other cheap, highly available substitutes. A trial was established analyze effects a single application three organic residues on barley yield nutrient upta...

The reduced availability of water resources in Egypt has imposed the need to intensify use wastewater for crop irrigation alluvial soils. Relevant effects can derive from contents potentially toxic metals (PTMs) supply soils, crops, and groundwater these areas. For this reason PTM content be monitored evaluate minimize health hazards. Therefore, context, two areas SE Nile Delta subjected 25 yea...

For the precise assay of minute quantities of insulin in biological fluids, techniques using fibril formation (1) or paper chromatography (2), although specific for the insulin molecule, lack the required sensitivity. Methods based on the measurement in vivo of a fall in blood sugar in surgically modified rats (3) afford sensitivity, but lack both specificity and precision. In zvitro biological...

This investigation has sought to determine the significance of the wide range of extractable collagen fractions which appear to exist in growing connective tissues and to determine their position in the process of fibrogenesis. Carrageenin granulomata were induced in guinea pigs and, after injection of (14)C-glycine, this tissue and skin from the same animal were subjected to successive extract...

The soils of Ganges River Floodplain (GRFP), an important crop growing zone the country, are known to be widely deficient in micronutrients. study was conducted relate distribution and fate soil micronutrients relation land type, properties cropping practices GRFP.A total 52 locations were selected for sample collection from across GRFP, varied series pattern, analysed DTPA extractable iron (Fe...

cu-mo and cu-ti contact structures were fabricated on multi-crystalline silicon substrates to provide a low resistance ohmic contact. deposition steps are done in an excellent vacuum chamber by means of electron beam evaporation and samples are then annealed for the realization of an efficient alloy layer. the effects of process parameters such as film thickness, annealing duration and temperat...