Results 141 to 150 of about 134,738 (300)

Environmentally adjusted productivity growth and shadow prices for dairy farms

Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie, EarlyView.
Abstract We estimate the environmentally adjusted productivity growth and shadow price for Ontario dairy farms. We use an input‐oriented directional distance function and farm‐level data from 2000 to 2020. First, we find that while GHG emissions per cow increase with higher milk yields, emission intensity decreases as milk yield per cow increases.
Bibek Dahal, Getu Hailu, Susantha Jayasundara   +2 more
wiley   +1 more source

Diversity, Methane Oxidation Activity, and Metabolic Potential of Microbial Communities in Terrestrial Mud Volcanos of the Taman Peninsula

Microorganisms
Microbial communities of terrestrial mud volcanoes are involved in aerobic and anaerobic methane oxidation, but the biological mechanisms of these processes are still understudied.
Alexander I. Slobodkin, Igor I. Rusanov, Galina B. Slobodkina, Aleksandra R. Stroeva, Nikolay A. Chernyh, Nikolai V. Pimenov, Alexander Y. Merkel   +6 more
doaj   +1 more source

Effect of Moderate Heat on TCE Reductive Dechlorination Rates in Groundwater

Groundwater Monitoring &Remediation, EarlyView.
Abstract Low‐temperature heating (in the mesophilic range of ~15 to 40 °C) of contaminated aquifers offers the prospect of increasing the rates for biotic and abiotic treatment of volatile organic compounds. Thermal In Situ Sustainable Remediation (TISR®) is one of the approaches available to implement low temperature heating.
David L. Freedman, Nicholas Cotter, Craig Divine, Shandra Justicia‐Leone   +3 more
wiley   +1 more source

Metal-driven anaerobic oxidation of methane and the Sturtian deglaciation

Nature Communications
The Sturtian and Marinoan glaciations shaped Neoproterozoic palaeoenvironmental evolution. While methane emission likely intensified the Marinoan greenhouse effect, its role during the Sturtian glaciation—coinciding with widespread iron formations (IFs ...
Jun Hu, Sanzhong Li, Shui-Jiong Wang, Jörn Peckmann, Hongxiang Guan, Shao-yong Jiang, Wei Chen, Huan Cui, Zheng Qin, Peng Liu, Yanhui Suo, Zhaoxia Jiang, Dongyong Li, Nan Wang, Xiaohui Li, Yuan Zhong, Ruru Li, Xi-Ming Yang, Kurt O. Konhauser   +18 more
doaj   +1 more source

Effect of Ethanol on Microbial Community Structure and Function During Natural Attenuation of Benzene, Toluene, and \u3cem\u3eo\u3c/em\u3e-Xylene in a Sulfate-reducing Aquifer [PDF]

, 2008
Ethanol (EtOH) is a commonly used fuel oxygenate in reformulated gasoline and is an alternative fuel and fuel supplement. Effects of EtOH release on aquifer microbial ecology and geochemistry have not been well characterized in situ.
Chakraborty, Irina, de Sieyes, Nick, Einarson, Murray, Feris, Kevin, Hristova, Krassimira R., Mackay, Doug, Scow, Kate M.   +6 more
core   +1 more source

Artificial electron acceptors decouple archaeal methane oxidation from sulfate reduction [PDF]

, 2016
The oxidation of methane with sulfate is an important microbial metabolism in the global carbon cycle. In marine methane seeps, this process is mediated by consortia of anaerobic methanotrophic archaea (ANME) that live in syntrophy with sulfate-reducing ...
Chadwick, Grayson L., McGlynn, Shawn E., Orphan, Victoria J., Scheller, Silvan, Yu, Hang   +4 more
core   +1 more source

Performance Evaluation of a Full‐Scale Anaerobic Internal Circulation Reactor Treating Calcium Rich Dairy Industry Wastewater

Water and Environment Journal, EarlyView.
This study investigates the impact of calcium on the performance of a large‐scale internal circulation (IC) reactor treating calcium‐rich dairy wastewater. Excessive calcium concentrations (400‐600 mg L−1) resulted in calcification of the anaerobic sludge, reactor walls, and pipes, suggesting a 17% and 25% reduction in biogas and methane production ...
O. D. Yepez‐Ceron, P. McCarthy, J. Browne, E. Casey, R. K. Dereli   +4 more
wiley   +1 more source

Diverse syntrophic partnerships from deep-sea methane vents revealed by direct cell capture and metagenomics [PDF]

, 2008
Microorganisms play a fundamental role in the cycling of nutrients and energy on our planet. A common strategy for many microorganisms mediating biogeochemical cycles in anoxic environments is syntrophy, frequently necessitating close spatial proximity ...
A. E. Dekas, A. Pernthaler, Amann, Ashkin, Bothe, C. T. Brown, DeLong, Edwards, Galagan, Girguis, Kalyuzhnaya, Knittel, Lanoil, Meyerdierks, Nauhaus, Nauhaus, Niemann, Orphan, Pernthaler, Raghoebarsing, Reeburgh, S. K. Goffredi, Schink, Sekar, T. Embaye, Tringe, Tyson, V. J. Orphan, Valentine, Yeung   +29 more
core   +4 more sources

Vertical distribution of methanotrophic archaea in an iron-rich groundwater discharge zone.

PLoS ONE
Anaerobic oxidation of methane coupled to iron reduction (Fe-AOM) is a crucial process for methane removal in terrestrial environments. However, the occurrence of Fe-AOM in natural environments is rare, and the mechanisms behind the direct coupling of ...
Katsunori Yanagawa, Misaki Okabeppu, Sakiko Kikuchi, Fumito Shiraishi, Yumiko Nakajima, Akihiro Kano   +5 more
doaj   +1 more source

Anaerobic oxidation of short-chain alkanes in hydrothermal sediments: potential influences on sulfur cycling and microbial diversity

Frontiers in Microbiology, 2013
Short-chain alkanes play a substantial role in carbon and sulfur cycling at hydrocarbon-rich environments globally, yet few studies have examined the metabolism of ethane (C2), propane (C3), and butane (C4) in anoxic sediments in contrast to methane (C1).
Melissa M Adams, Adrienne L Hoarfrost, Arpita eBose, Samantha B Joye, Peter R Girguis   +4 more
doaj   +1 more source