Results 81 to 90 of about 12,223 (196)

The origin, source, and cycling of methane in deep crystalline rock biosphere [PDF]

, 2015
RK would like to thank the Finnish Research Program on Nuclear Waste Management (grants SALAMI and RENGAS) for funding.The emerging interest in using stable bedrock formations for industrial purposes, e.g., nuclear waste disposal, has increased the need ...
Kietäväinen, Riikka, Purkamo, Lotta
core   +1 more source

Chemosynthetic Organic Matter Reveals a Protracted Episode of Past Methane Seepage Activities at a Newly Discovered Cold Seep Site (Mannar Basin) Off the East Coast of India

Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract Here, we present organic geochemical evidence of past methane‐seepage events in a sediment core retrieved from a recently discovered methane cold‐seep site off Mannar Basin, east coast of India. The significant negative C‐isotope excursion of organic matter (δ13CTOC) in the seep core compared to a reference non‐seep core suggests a substantial
Ankita Ghosh, Aninda Mazumdar, Mohd. Sadique, Aditya Peketi, Anjali Zatale, Kalyani Sivan, Sharmila Ravindran Pillai, Aman Sparsh   +7 more
wiley   +1 more source

The effect of an experiential learning program on motivations and activity involvement among dementia supporters in Japan.

PLoS ONE, 2020
PurposeThe purpose of this study was to examine the effectiveness of an experiential learning program based on Kolb's theory in increasing dementia supporters' motivation and activity involvement within the community.MethodIn this interventional study ...
Hiromi Arakawa, Tokie Anme
doaj   +1 more source

Sulfur Isotope Biogeochemistry Controlled by Sulfate Reduction Activity in Cold Seep Sediments

Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract Cold seeps are unique deep‐sea ecosystems that play an important role in marine biogeochemical cycles. However, the dynamics and regulation of sulfur isotope biogeochemistry in seep sediments remain unconstrained. We investigated the geochemical characteristics of active seep sites, including the content and stable isotope composition of ...
Bing‐Zheng Wu, Jiarui Liu, Xiting Liu, Shi‐Hai Mao, Zhen Zhou, Qiao Liu, Gui‐Peng Yang, Samantha B. Joye, Guang‐Chao Zhuang   +8 more
wiley   +1 more source

Diverse Cooccurring Metabolisms Support Sulfur and Methane Cycling in Wetland Surficial Sediments

Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 9, September 2025.
Abstract The Prairie Pothole Region (PPR) of North America contains millions of small depressional wetlands with some of the highest methane (CH4) fluxes ever reported in terrestrial ecosystems. In saturated soils, two conventional paradigms are (a) methanogenesis is the final step in the redox ladder, occurring only after more thermodynamically ...
Emily K. Bechtold, Danhui Xin, Maricia Pacheco, Brandy M. Toner, William A. Arnold, Yu‐Ping Chin, Michael J. Wilkins   +6 more
wiley   +1 more source

Visualizing in situ translational activity for identifying and sorting slow-growing archaeal−bacterial consortia [PDF]

, 2016
To understand the biogeochemical roles of microorganisms in the environment, it is important to determine when and under which conditions they are metabolically active.
Connon, Stephanie A., Goudeau, Danielle, Hatzenpichler, Roland, Malmstrom, Rex R., Orphan, Victoria J., Woykeb, Tanja   +5 more
core   +2 more sources

Methane‐Driven Arsenic Biogeochemical Cycling in Deep‐Sea Cold Seeps: Implications for Oceanic Arsenic Geochemistry

Geophysical Research Letters, Volume 52, Issue 16, 28 August 2025.
Abstract Arsenic accumulation in seafloor cold seeps is poorly understood. Here, we investigate the interplay between arsenic and methane biogeochemical cycles at the Haima cold seep, South China Sea. Geochemical analyses showed elevated arsenic levels in seep sediments, primarily as sulfide‐bound forms, with strong correlations between dissolved ...
Jiwei Li, Xiyang Dong, Shuangquan Liu, Wanli Chen, Jin Liao, Chuwen Zhang, Shijie Bai, Hengchao Xu, Jian Zhang, Shun Chen, Kaiwen Ta, Shamik Dasgupta, Xiaotong Peng   +12 more
wiley   +1 more source

An oligotrophic deep-subsurface community dependent on syntrophy is dominated by sulfur-driven autotrophic denitrifiers [PDF]

, 2016
Subsurface lithoautotrophic microbial ecosystems (SLiMEs) under oligotrophic conditions are typically supported by H₂. Methanogens and sulfate reducers, and the respective energy processes, are thought to be the dominant players and have been the ...
Guo, Ling, Harris, Rachel L., Kieft, Thomas L., Kuloyo, Olukayode, Kyin, Saw, Lau, Maggie C. Y., Li, Long, Linage-Alvarez, Borja, Lindsay, Melody R., Magnabosco, Cara, Oh, Youmi, Ono, Shuhei, Onstott, Tullis C., Perlman, David H., Purtschert, Roland, Sherwood Lollar, Barbara, Shwe, Henry H., Slater, Greg F., van Heerden, Esta, Wang, Wei, Wei, Siwen, Wiggins, Jessica B., Yi, Min Joo   +22 more
core   +1 more source

In Situ Metabolic Rates of Alkane‐Degrading Sulphate‐Reducing Bacteria in Hydrocarbon Seep Sediments Revealed by Combining CARD‐FISH, NanoSIMS, and Mathematical Modelling

Environmental Microbiology, Volume 27, Issue 8, August 2025.
Sulphate‐reducing bacteria affiliated with clades SCA1, SCA2, and LCA2 were investigated using stable‐isotope incubations and in situ analysis at several hydrocarbon seep sites. Extrapolated rates of sulphate reduction and alkane degradation suggest that these clades play an important role at hydrocarbon seeps, contributing substantially to sulphur and
Sara Kleindienst, Lubos Polerecky, Rudolf Amann, Florin Musat, Katrin Knittel   +4 more
wiley   +1 more source

Overview of the Japan Children’s Study 2004–2009; Cohort Study of Early Childhood Development [PDF]

, 2010
Background: There are still a lot of unknown aspects about the childhood development of sociability which are based on neuroscientific basis. Purpose of the Japan Children’s Study (JCS) was to verify the normal process of child development of sociability;
Anme Tokie, Japan Children\u27s Study Group, Maeda Tadahiko, Sadato Norihiro, Yamagata Zentaro, 安梅 勅江   +5 more
core   +1 more source