Residues of Logarithmic Differential Forms in Complex Analysis and Geometry微分形式 对数 残留 几何 十字路口 应用程序 理论关系 剩余电流In the article, we discuss basic concepts of the residue theory of logarithmic and multi-logarithmic differential forms, and describe some aspects of the theory, ...
A feasible and reproducible method for multiresidue analysis of several common pesticides, of different polarities, in wine samples is proposed. The method combines a solid-phase extraction on polymeric cartridges eluted with ethyl acetate and a gas chromatographic determination using electron capture and...
Thanks to its advanced design, the TSQ Altis mass spectrometer enables highly selective reaction monitoring (H-SRM), an easy-to-use data acquisition approach that provides enhanced signal-to-noise sensitivity and selectivity for high confidence and interference-free quantitation in complex ...
After overexpressing h-Fuc in Escherichia coli as an active form, we investigated the catalytic function of this recombinant enzyme. Based on sequence alignment and structural analysis of close homologues of h-Fuc, nine residues of glutamate and aspartate in h-Fuc were selected for mutagenic tests...
Isolation of a candidate human telomerase catalytic subunit gene, which reveals complex splicing patterns in different cell types. Telomerase is a multicomponent reverse transcriptase enzyme that adds DNA repeats to the ends of chromosomes using its RNA component as a template for synt... Kilian,D ...
47. An integrative analysis of genetic differentiation in the brown hare Lepus europaeus based on morphology, allozymes, and ... A total of 469 brown hares Lepus europaeus Pallas, 1778 from 20 sampling sites in Austria were examined for genetic diversity within and among populations ... GB ...
For multianalyte analysis, automatic instrument software is commonly used to make initial qualitative identifications of the target analytes by comparison of their mass spectra against a database library. Especially at low residue levels in complex matrices, manual checking of results is typically needed...
Organochlorine pollutant levels in the blubber of small cetaceans and ratios between concentrations of compounds, such as DDE/tDDT and tDDT/PCB, were used to identity the chronology of input of DDT and PCB into the coastal waters along the west and east coasts of southern Africa. Although regr...
We propose a magmatic thermal trigger as the underlying mechanism for the complex topography observed in the chaotic terrain, as presented in our study. Utilizing mudstones as the base stratigraphy in the simulation. In our simulation, we used mudstones as the foundational stratigraphy, a decision ...
We evidence bound nickel-geoporphyrins moieties in low-grade metamorphic rocks, preserved in situ within cells of a ~1 Gyr-old multicellular eukaryote, Arctacellularia tetragonala. We identify these moieties as chlorophyll derivatives, indicating that A. tetragonala was a phototrophic eukaryote, one ...