The stoichiometry of efficient soil microbial carbon use is a sensitive index for measuring changes in quality and plays crucial role research on ecological the nutrient cycle. To further understand effect feldspathic sandstone sand compound ratios efficiency (CUE), we simulated field conditions sandstone-sand layer Mu Us sandy land analyzed C:N:P ratio, biomass, extracellular enzyme activity, ...

Correlations between foliar nutrient concentrations and soil nutrient availability have been found in multiple ecosystems. These relationships have led to the use of foliar nutrients as an index of nutrient status and to the prediction of broadscale patterns in ecosystem processes. More recently, a growing interest in ecological stoichiometry has fueled multiple analyses of foliar nitrogen:phos...

H(+)/site, charge/site, and ATP/site ratios have been determined at coupling sites I, II, and III. Three e(-) donors have been used for coupling site III: ferrocyanide, ascorbate + tetramethyl-p-phenylenediamine (TMPD), and succinate + TMPD. The H(+)/site ratios are 4.0 with ferrocyanide and 6.0 with succinate + TMPD (at pH <7.0); the charge/site ratios are 6.0 with ferrocyanide and with succin...

Large amounts of nutrients have been released to the coastal ecosystems during 20th century. Since then, management policies implemented and these decreased in economically developed countries. We examined bi-decadal changes (nitrate + nitrite, ammonium, orthophosphate silicic acid) Arcachon bay, a semi-enclosed lagoon that hosts one largest but declining seagrass meadow Europe. Seven sites sam...

Flooding can adversely worsen metal-contaminated soil and influence phytoremediation efficiency; thus, it is crucial to explore the eco-physiological responses of plants combined stress metals flooding. Here, plant growth, photosynthesis, nutrient composition in arbor willow (Salix jiangsuensis ‘J172’) shrub integra ‘Yizhibi’) were studied using a pot experiment with Cu-contaminated (239.5 mg∙k...

The stability and stoichiometry of β(3)-peptide bundles is influenced by side-chain identity. β(3)-peptides containing β(3)-homoleucine on one helical face assemble into octamers, whereas those containing β(3)-homovaline form tetramers. From a structural perspective, the side chains of β(3)-homoleucine and β(3)-homovaline differ in terms of both side-chain length and γ-carbon branching. To eval...