the essential nutrients in the pharmacological plants play a significant role in the remedy of illnesses but, these elements at high levels; can also be dangerous and toxic. the aim of this study was to determine the concentration of macro (mg, ca, p, and k) and micro (cu, zn, fe and mn) essential elements in seven indigenous pharmacological plants growing in fars province, southern iran. they ...

MOTIVATION Identification of metabolites is essential for its use as biomarkers, for research in systems biology and for drug discovery. The first step before a structure can be elucidated is to determine its elemental composition. High-resolution mass spectrometry, which provides the exact mass, together with common constraint rules, for rejecting false proposed elemental compositions, cannot ...

Differences in the chemical composition of calcified skeletal structures (e.g. shells, otoliths) have proven useful for reconstructing the environmental history of many marine species. However, the extent to which ambient environmental conditions can be inferred from the elemental signatures within the vertebrae of elasmobranchs (sharks, skates, rays) has not been evaluated. To assess the relat...

The elemental composition of phytoplankton is a fusion of the evolutionary history of the host and plastid, resulting in differences in genetic constraints and selection pressures associated with environmental conditions. The evolutionary inheritance hypothesis predicts similarities in elemental composition within related taxonomic lineages of phytoplankton. To test this hypothesis, we measured...

How does consumer physiology and life history respond to them? And (3) What are their consequences for ecological processes in ecosystems? Elemental imbalances are defi ned by a mismatch between the elemental demands of a consumer and those provided by its resources. For example, carbon-tophosphorus (C:P) ratios in the suspended organic matter in lakes (i.e., algae, bacteria, and detritus) can ...

The elemental and structural features of the nitride nanostructured coating produced by vacuum arc evaporation from high-entropy cathode TiHfVNbZr were studied. Using of the complementary methods of elemental analysis (RBS, SIMS and GDMS) allowed to carry out a comprehensive analysis of the elemental composition, namely to determine the chemical composition of the surface layer, to establish th...

CHONDRITES QUE93005 AND NOGOYA: IMPLICATIONS FOR SCALES OF ELEMENTAL REDISTRIBUTION DURING AQUEOUS ALTERATION. M. A. Velbel1, E.K. Tonui2, and M.E. Zolensky3, 1Department of Geological Sciences, Michigan State University, East Lansing, MI 48824-1115 ([email protected]), 2Department of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, 3Astromaterials Research & Ex...