Results 121 to 130 of about 1,885,987 (306)

Early diagenesis of amino acids in NE Atlantic continental margin sediments [PDF]

, 2002
This thesis concentrates on early diagenesis of amino acids in sediments across the NE Atlantic continental slope. Early diagenesis comprises the degradation and transformation processes that take place during transport of amino acids through the water
Organic geochemistry & molecular biogeology, Resistant Organic Matter (ROM), IVAU: Instituut voor Aardwetenschappen Utrecht, Geochemistry, Grutters, M.C.H., Grutters, M.M.C.H.   +5 more
core   +1 more source

Microbial Community Dynamics in Marine Water: Influence of Hydrocarbon Type and Exposure Time

Environmental Toxicology, EarlyView.
ABSTRACT Marine environments are frequently impacted by petroleum‐derived hydrocarbons, which pose ecological risks because of their toxic, mutagenic, and carcinogenic potential. Microorganisms play a crucial role in hydrocarbon degradation, and understanding the influence of time and hydrocarbon type on microbial dynamics helps improve bioremediation ...
Karen C. F. Santaren, Douglas A. Monteiro, Eliene S. Lopes, Diogo A. Jurelevicius, Lucy Seldin   +4 more
wiley   +1 more source

Microbial oxidation and carbonate cementation led to three-dimensional preservation of ichthyosaur bones

Communications Earth & Environment
Exceptional preservation of ichthyosaur fossils in the Toarcian (~183–180 Ma) Posidonia Shale of southwest Germany was previously attributed to sustained anoxia or euxinic conditions that excluded aerobic scavengers and promoted early diagenetic ...
Andrew Ji Yao Jian, Lorenz Schwark, Stephen Francis Poropat, Alex Ian Holman, Luke Marshall Brosnan, Maria Diaz Mateus, Michael Ernst Böttcher, Kliti Grice   +7 more
doaj   +1 more source

Synergistic and Antagonistic Effects of Chemical Pollutants and Parasitic Fungi on Cyanobacterial Metabolism

Environmental Toxicology, EarlyView.
ABSTRACT Freshwater ecosystems are increasingly impacted by anthropogenic pollutants, including the widely used herbicide metolachlor (MET) and cigarette butt (CB) litter. Parasites represent an additional biotic stressor that can modulate pollutant effects on their hosts.
Erika Berenice Martínez‐Ruiz, Jutta Fastner, Stephanie Spahr, Justyna Wolinska   +3 more
wiley   +1 more source

Carbonyl Compounds Observed at a Suburban Site during an Unusual Wintertime Ozone Pollution Event in Guangzhou

Atmosphere
Carbonyl compounds are important oxygenated volatile organic compounds (VOCs) that play significant roles in the formation of ozone (O3) and atmospheric chemistry.
Aoqi Ge, Zhenfeng Wu, Shaoxuan Xiao, Xiaoqing Huang, Wei Song, Zhou Zhang, Yanli Zhang, Xinming Wang   +7 more
doaj   +1 more source

Natural sulfurization of carbohydrates in marine sediments : consequences for the chemical and carbon isotopic composition of sedimentary organic matter [PDF]

, 2003
Carbohydrates make up the largest part of the organic matter in the biosphere and are used by living organism for many different reasons. They serve, among others, as carbon and energy source as well as metabolic intermediates.
Organic geochemistry & molecular biogeology, Resistant Organic Matter (ROM), IVAU: Instituut voor Aardwetenschappen Utrecht, Dongen, B.E. van, Molecular palaeontology of marine sediments, Geochemistry, van Dongen, B.E.   +6 more
core   +1 more source

Oxidative Stress Biomarkers in the Shrimp Macrobrachium amazonicum (Heller, 1862): Assessment in an Environmental Preservation Area in the Brazilian Amazon

Environmental Toxicology, EarlyView.
ABSTRACT Anthropogenic activities generate a significant amount of pollutants that are released into the environment, causing physiological and ecological disturbances. Among the xenobiotics present in aquatic ecosystems, numerous chemical and organic compounds have oxidative potential or are metabolized through oxidative processes, which may amplify ...
Natália Eduarda da Silva, Arllon José dos Santos Dias, Layane Vitoria dos Santos e Santos, Natalie de Matos Araujo, Darlan Coutinho dos Santos, Jefferson Romáryo Duarte da Luz, Gabriel Araujo‐Silva   +6 more
wiley   +1 more source

Maintaining ecological soil functions - techniques in organic farming systems [PDF]

, 2000
The ecological soil functions (e.g. habitat and living space, production and utilization, ecological regulation) have to be taken into account and maintained by farming systems.
Beste, Andrea
core   +1 more source

Variation on Toxic and Inflammatory Potential of Coal Smoke of Different Sources From a Region With High Lung Cancer Risk

Environmental Toxicology, EarlyView.
ABSTRACT Excess lung cancer risk in Xuanwei and Fuyuan, China, has been attributed to household air pollution from use of a locally sourced smoky (bituminous) coal. However, the carcinogenic mechanisms remain unclear. Given the important role of inflammation in lung cancer development, this study compared the proinflammatory potentials of the ...
Yongliang Zhang, Wei Hu, Nathanial Rothman, Dingyu Liu, Jihua Li, Jun Xu, Bofu Ning, Roel Vermeulen, Qing Lan, Flemming R. Cassee, George S. Downward   +10 more
wiley   +1 more source

Optimizing In‐Situ Measurement of Representative BVOC Emission Factors Considering Intraspecific Variability

Geophysical Research Letters
Accurately measuring emission factors (Es) of biogenic volatile organic compounds (BVOCs) with consideration of intraspecific variability is vital but often overlooked.
Jianqiang Zeng, Yanli Zhang, Weihua Pang, Haofan Ran, Hao Guo, Wei Song, Xinming Wang   +6 more
doaj   +1 more source