Microbial utilization of recently fixed, plant-derived organic carbon in shallow Holocene and Pleistocene aquifers in Bangladesh [0.03%]
孟加拉国全新世和更新世浅层含水层中微生物对最近固定和植物衍生的有机碳的利用
K J Whaley-Martin,R J San Pedro,B J Mailloux et al.
K J Whaley-Martin et al.
The presence of dissolved arsenic in shallow aquifers of Bangladesh is widely accepted to require microbial dissimilatory iron-reduction in anoxic aquifers utilizing organic carbon as an electron donor. However, the various potential source...
Xeropreservation of functionalized lipid biomarkers in hyperarid soils in the Atacama Desert [0.03%]
阿塔卡马沙漠超干旱土壤中功能化脂质生物标志物的干保存
Mary Beth Wilhelm,Alfonso F Davila,Jennifer L Eigenbrode et al.
Mary Beth Wilhelm et al.
Our understanding of long-term organic matter preservation comes mostly from studies in aquatic systems. In contrast, taphonomic processes in extremely dry environments are relatively understudied and are poorly understood. We investigated ...
Weathering of pyrogenic organic matter induces fungal oxidative enzyme response in single culture inoculation experiments [0.03%]
热解碳的生物 weathering：单菌接种实验中的真菌氧化酶响应
Christy Gibson,Timothy D Berry,Ruzhen Wang et al.
Christy Gibson et al.
The addition of pyrogenic organic matter (PyOM), the aromatic carbon-rich product of the incomplete combustion of plant biomass or fossil fuels, to soil can influence the rate of microbial metabolism of native soil carbon. The interaction o...
Identification and quantification of polyfunctionalized hopanoids by high temperature gas chromatography-mass spectrometry [0.03%]
高温气相色谱-质谱法鉴定和定量多官能化环_hopanoid化合物
Alex L Sessions,Lichun Zhang,Paula V Welander et al.
Alex L Sessions et al.
Hopanoids are triterpenoids produced mainly by bacteria, are ubiquitous in the environment, and have many important applications as biological markers. A wide variety of related hopanoid structures exists, many of which are polyfunctionaliz...
Sources and composition of organic matter for bacterial growth in a large European river floodplain system (Danube, Austria) [0.03%]
欧洲大型河流泛滥平原系统（多瑙河，奥地利）细菌生长的有机物来源和组成
Katharina Besemer,Birgit Luef,Stefan Preiner et al.
Katharina Besemer et al.
Dissolved and particulate organic matter (DOM and POM) distribution, lignin phenol signatures, bulk elemental compositions, fluorescence indices and microbial plankton (algae, bacteria, viruses) in a temperate river floodplain system were m...
All-cis hentriaconta-9,15,22-triene in microbial mats formed by the phototrophic prokaryote Chloroflexus [0.03%]
由光合原核生物Chloroflexus形成的微生物垫中的全顺式hentriaconta-9,15,22-三烯醛
M T van der Meer,S Schouten,D M Ward et al.
M T van der Meer et al.
All-cis hentriaconta-9,15,22-triene (I) has been isolated from Chloroflexus mats, Yellowstone National Park (USA), and identified by GC-(HR)MS analysis of I and its hydrogenated and DMDS-derivatized products and by 1H and 13C NMR spectrosco...
J T Gelwicks,J B Risatti,J M Hayes
J T Gelwicks
The carbon kinetic isotope effects associated with synthesis of acetate from CO2 and H2 during autotrophic growth of Acetobacterium woodii at 30 degrees C have been measured by isotopic analyses of CO2, methyl-carbon, and total acetate. Clo...
The role of minerals in the thermal alteration of organic matter--III. Generation of bitumen in laboratory experiments [0.03%]
矿物在有机质热演化中的作用第三部分：实验室实验中沥青的生成
B J Huizinga,E Tannenbaum,I R Kaplan
B J Huizinga
A series of pyrolysis experiments, utilizing two different immature kerogens (from the Monterey and Green River Formations) mixed with common sedimentary minerals (calcite, illite, or Na-montmorillonite), was conducted to study the impact o...
K Kawamura,E Tannenbaum,B J Huizinga et al.
K Kawamura et al.
Long-chain fatty acids (C10-C32), as well as C14-C21 isoprenoid acids (except for C18), have been identified in anhydrous and hydrous pyrolyses products of Green River kerogen (200-400 degrees C, 2-1000 hr). These kerogen-released fatty aci...
Phenols in hydrothermal petroleums and sediment bitumen from Guaymas Basin, Gulf of California [0.03%]
加利福尼亚下加岛湾热液石油和沉积沥青酚类物质的分析
B R Simoneit,R N Leif,R Ishiwatari
B R Simoneit
The aliphatic, aromatic and polar (NSO) fractions of seabed petroleums and sediment bitumen extracts from the Guaymas Basin hydrothermal system have been analyzed by gas chromatography and gas chromatography-mass spectrometry (free and sily...