Results 111 to 120 of about 51,211 (258)

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

Ferromanganese nodules and micro-hardgrounds associated with the Cadiz Contourite Channel (NE Atlantic): Palaeoenvironmental records of fluid venting and bottom currents [PDF]

, 2012
Ferromanganese nodule fields and hardgrounds have recently been discovered in the Cadiz Contourite Channel in the Gulf of Cadiz (850–1000 m). This channel is part of a large contourite depositional system generated by the Mediterranean Outflow Water ...
Abouchami, Al-Aasm, Albarède, Ambar, Ambar, Baraza, Baturin, Beal, Berner, Berner, Berner, Birgel, Blinova, Boetius, Bogdanov, Borowski, Brass, Bryden, Cabeçadas, Cacho, Cangemi, Chen, Chen, Chester, Claude, Claypool, Coleman, Dicus, Díaz-del-Río, Ercilla, Faugères, Faugères, Faugères, Fernández-Puga, Fietzke, Fietzke, Fomina, Fortin, Francisco Javier González, Frankel, García, Gardner, Gardner, Giresse, Glasby, González, González, González, González, González, Grootes, Grootes, Hamoumi, Han, Hartmann, Hein, Hein, Hein, Hein, Hein, Hensen, Hernández-Molina, Hernández-Molina, Hernández-Molina, Hinrichs, Hlawatsch, Hodell, ISA, International Seabed Authority, Jesús Martínez-Frías, José Eugenio Ortiz, Kasten, Kennett, Kenyon, Kohn, Konshauser, Koschinsky, Koschinsky, Kozlova, León, León, León, León, León, Llave, Llave, Llave, Loubere, Lovley, Luis Somoza, Madelain, Magalhães, Maldonado, Mangini, Manheim, Martín-Puertas, Massé, Mazurenko, McArthur, McArthur, Medialdea, Medialdea, Meese, Merinero, Mulder, Munsell Color Co, Nealson, Nealson, Nelson, Nelson, Nelson, Niemann, O'Neill-Barringer, O'Nions, Ochoa, Palmer, Palmer, Paull, Pautot, Peckmann, Peckmann, Pinheiro, Piper, Platt, Puteanus, Raúl Merinero, Rebesco, Reyss, Ricardo León, Robinson, Rogers, Rona, Rosario Lunar, Scholz, Sevastýanov, Sivkov, Somoza, Stadnitskaia, Stadnitskaia, Stein, Stow, Stow, Stumpf, Summerhayes, Taylor, Tebo, Tebo, Templer, Teresa Medialdea, Trinidad de Torres, Tucholke, Usui, Vegas, Veizer, Viana, Voelker, von Stackelberg, Walters, Webb, Zahn, Zheng   +159 more
core   +2 more sources

H2‐dependent modulation of tetrahydromethanopterin S‐methyltransferase (Mtr complex) activity by the small protein MtrR in Methanosarcina mazei

The FEBS Journal, EarlyView.
Small protein MtrR is a regulator of the Mtr methyltransferase complex in Methanosarcina mazei. It binds specifically to the MtrA subunit and modulates Mtr activity in response to hydrogen (H2) availability. Deleting mtrR impairs growth in the presence but not absence of H2, indicating its role in directing methyl transfer toward an energy‐conserving ...
Tim Habenicht, Bjarne Hastedt, Liam Cassidy, Claudia Kießling, Andreas Tholey, Jan M. Schuller, Ruth A. Schmitz   +6 more
wiley   +1 more source

Microbial diversity in deep-sea methane seep sediments presented by SSU rRNA gene tag sequencing [PDF]

, 2012
http://www.godac.jamstec.go.jp/darwin/cruise/yokosuka/yk06-03/
ASHI, Juichiro, HIRAI, Miho, IMACHI, Hiroyuki, KAZAMA, Hiromi, NUNOURA, Takuro, TAKAI, Ken, TAKAKI, Yoshihiro, 井町, 寛之, 布浦, 拓郎, 平井, 美穂, 芦, 寿一郎, 風間, 宏美, 高井, 研, 高木, 善弘   +13 more
core   +1 more source

Prebiotic aqueous reactions catalyzed by native nickel without hydrogen

The FEBS Journal, EarlyView.
Serpentinizing (H2‐producing) hydrothermal vents are candidate environments for metabolic origin. They generate highly reducing conditions that convert CO2 to formate and methane in abiotic reactions resembling reactions of the acetyl‐CoA pathway of CO2 fixation. They also contain natural catalysts. Native nickel (Ni0), like Fe0, Co0, and their alloys,
Carolina Garcia Garcia, Max Brabender, William F. Martin   +2 more
wiley   +1 more source

Persistent activity of aerobic methane-oxidizing bacteria in anoxic lake waters due to metabolic versatility

Nature Communications
Lacustrine methane emissions are strongly mitigated by aerobic methane-oxidizing bacteria (MOB) that are typically most active at the oxic-anoxic interface.
Sina Schorn, Jon S. Graf, Sten Littmann, Philipp F. Hach, Gaute Lavik, Daan R. Speth, Carsten J. Schubert, Marcel M. M. Kuypers, Jana Milucka   +8 more
doaj   +1 more source

Metal-Driven Anaerobic Oxidation of Methane as an Important Methane Sink in Methanic Cold Seep Sediments. [PDF]

Microbiol Spectr, 2023
Xiao X, Luo M, Zhang C, Zhang T, Yin X, Wu X, Zhao J, Tao J, Chen Z, Liang Q, Dong X.   +10 more
europepmc   +1 more source

Overcoming organic and nitrogen overload in thermophilic anaerobic digestion of pig slurry by coupling a microbial electrolysis cell [PDF]

, 2016
The combination of the anaerobic digestion (AD) process with a microbial electrolysis cell (MEC) coupled to an ammonia stripping unit as a post-treatment was assessed both in series operation, to improve the quality of the effluent, and in loop ...
Bonmatí Blasi, August, Cerrillo Moreno, Míriam, Viñas Canals, Marc   +2 more
core   +2 more sources

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

Deep-branching ANME-1c archaea grow at the upper temperature limit of anaerobic oxidation of methane. [PDF]

Front Microbiol, 2022
Benito Merino D, Zehnle H, Teske A, Wegener G.   +3 more
europepmc   +1 more source