Use of Microfocused X-ray Techniques to Investigate the Mobilization of As by Oxalic Acid [0.03%]
利用微聚焦X射线技术研究草酸对砷 mobilization 的作用
Karen Wovkulich,Brian J Mailloux,Benjamin C Bostick et al.
Karen Wovkulich et al.
Improved linkages between aqueous phase transport and solid-phase reactions are needed to better predict and model transport of contaminants through the subsurface. Here we develop and apply a new method for measuring As mobilization in sit...
Identifying and tracking proteins through the marine water column: insights into the inputs and preservation mechanisms of protein in sediments [0.03%]
通过海洋水柱鉴定和追踪蛋白质：关于沉积物中蛋白质输入和保存机制的见解
Eli K Moore,Brook L Nunn,David R Goodlett et al.
Eli K Moore et al.
Proteins generated during primary production represent an important fraction of marine organic nitrogen and carbon, and have the potential to provide organism-specific information in the environment. The Bering Sea is a highly productive sy...
Sr/Ca and Ca/Ca fractionation during inorganic calcite formation: III. Impact of salinity/ionic strength [0.03%]
盐度/离子强度对无机文石形成过程中Sr/Ca和CaCO3/Ca2+分馏的影响
Jianwu Tang,Andrea Niedermayr,Stephan J Köhler et al.
Jianwu Tang et al.
In order to apply Sr/Ca and (44)Ca/(40)Ca fractionation during calcium carbonate (CaCO(3)) formation as a proxy to reconstruct paleo-environments, it is essential to evaluate the impact of various environmental factors. In this study, a CO(...
Linear Free Energy Relationships for Metal-Ligand Complexation: Bidentate Binding to Negatively-Charged Oxygen Donor Atoms [0.03%]
金属配位的线性自由能关系：负电氧供体原子的双齿配位
Richard F Carbonaro,Yasemin B Atalay,Dominic M Di Toro
Richard F Carbonaro
Stability constants for metal complexation to bidentate ligands containing negatively-charged oxygen donor atoms can be estimated from the following linear free energy relationship (LFER): log K(ML) = χ(OO)(α(O) log K(HL,1) + α(O) log K(...
Copper isotope fractionation during surface adsorption and intracellular incorporation by bacteria [0.03%]
铜同位素在细菌表面吸附和细胞内掺入过程中的分馏效应
Jesica U Navarrete,David M Borrok,Marian Viveros et al.
Jesica U Navarrete et al.
Copper isotopes may prove to be a useful tool for investigating bacteria-metal interactions recorded in natural waters, soils, and rocks. However, experimental data which attempt to constrain Cu isotope fractionation in biologic systems are...
Characterization of synthetic nanocrystalline mackinawite: crystal structure, particle size, and specific surface area [0.03%]
合成纳米结晶mackinawite的表征：晶体结构、粒径和比表面积
Hoon Y Jeong,Jun H Lee,Kim F Hayes
Hoon Y Jeong
Iron sulfide was synthesized by reacting aqueous solutions of sodium sulfide and ferrous chloride for 3 days. By X-ray powder diffraction (XRPD), the resultant phase was determined to be primarily nanocrystalline mackinawite (space group: P...
Evidence for equilibrium iron isotope fractionation by nitrate-reducing iron(II)-oxidizing bacteria [0.03%]
硝酸盐还原的铁氧化细菌中铁同位素分馏达到平衡的证据
A Kappler,C M Johnson,H A Crosby et al.
A Kappler et al.
Iron isotope fractionations produced during chemical and biological Fe(II) oxidation are sensitive to the proportions and nature of dissolved and solid-phase Fe species present, as well as the extent of isotopic exchange between precipitate...
The Impact of Bacterial Strain on the Products of Dissimilatory Iron Reduction [0.03%]
细菌菌株不同导致脱硫还原铁中铁硫产物不同的原因分析
Everett C Salas,William M Berelson,Douglas E Hammond et al.
Everett C Salas et al.
Three bacterial strains from the genus Shewanella were used to examine the influence of specific bacteria on the products of dissimilatory iron reduction. Strains CN32, MR-4 and W3-18-1 were incubated with HFO (hydrous ferric oxide) as the ...
Elongated prismatic magnetite crystals in ALH84001 carbonate globules: potential Martian magnetofossils [0.03%]
ALH84001碳酸盐球粒中的延長纤状磁铁矿晶体：潜在的火星生物成因化石证据
K L Thomas-Keprta,D A Bazylinski,J L Kirschvink et al.
K L Thomas-Keprta et al.
Using transmission electron microscopy (TEM), we have analyzed magnetite (Fe3O4) crystals acid-extracted from carbonate globules in Martian meteorite ALH84001. We studied 594 magnetites from ALH84001 and grouped them into three populations ...
Comparative Study
Geochimica et cosmochimica acta. 2000 Dec;64(23):4049-81. DOI:10.1016/s0016-7037(00)00481-6 2000
S Pizzarello,J R Cronin
S Pizzarello
Small (1.0-9.2%) L-enantiomer excesses were found in six alpha-methyl-alpha-amino alkanoic acids from the Murchison (2.8-9.2%) and Murray (1.0-6.0%) carbonaceous chondrites by gas chromatography-mass spectroscopy of their N-trifluoroacetyl ...
Comparative Study
Geochimica et cosmochimica acta. 2000 Jan;64(2):329-38. DOI:10.1016/s0016-7037(99)00280-x 2000