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Uso de levaduras y fumarato para disminuir la metanogénesis en la fermentación de alfalfa. Colegio de Postgraduados
Báez Pérez, José Luis.
Se realizaron tres experimentos en biorreactores acoplados a trampas de gas para evaluar el efecto de Saccharomyces cerevisiae y fumarato de sodio en la fermentación in vitro de alfalfa. En el primero se evaluó la fermentación de alfalfa en medio de cultivo glucosa, celobiosa, almidón y fluido ruminal (GCAFR) usando trampas de gas con agua, solución salina ácida y solución de NaOH. Se midió producción de biogás, CH4, CO2, pH y bacterias totales (BT). El diseño experimental fue completamente al zar con arreglo factorial 2 x 3, y tres repeticiones por tratamiento. En el segundo experimento se evaluó el efecto de Yea sacc®, Procreatin 7® y Diamond V XP® en la fermentación in vitro de alfalfa. Se midió producción de CH4, ácidos grasos volátiles (AGV),...
Palavras-chave: Fermentación ruminal; Biogás; CH4; Saccharomyces cerevisiae; Fumarato de sodio; Rumen fermentation; Biogas; Sodium fumarate; Ganadería; Doctorado.
Ano: 2010 URL: http://hdl.handle.net/10521/85
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Uso de levaduras y fumarato para disminuir la metanogénesis en la fermentación de alfalfa. Colegio de Postgraduados
Báez Pérez, José Luis.
Se realizaron tres experimentos en biorreactores acoplados a trampas de gas para evaluar el efecto de Saccharomyces cerevisiae y fumarato de sodio en la fermentación in vitro de alfalfa. En el primero se evaluó la fermentación de alfalfa en medio de cultivo glucosa, celobiosa, almidón y fluido ruminal (GCAFR) usando trampas de gas con agua, solución salina ácida y solución de NaOH. Se midió producción de biogás, CH4, CO2, pH y bacterias totales (BT). El diseño experimental fue completamente al zar con arreglo factorial 2 x 3, y tres repeticiones por tratamiento. En el segundo experimento se evaluó el efecto de Yea sacc®, Procreatin 7® y Diamond V XP® en la fermentación in vitro de alfalfa. Se midió producción de CH4, ácidos grasos volátiles (AGV),...
Palavras-chave: Fermentación ruminal; Biogás; CH4; Saccharomyces cerevisiae; Fumarato de sodio; Rumen fermentation; Biogas; Sodium fumarate; Ganadería; Doctorado.
Ano: 2010 URL: http://hdl.handle.net/10521/85
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Observação e modelagem das emissões dos gases de efeito estufa CO2, CH4 e N2O, em plantação de cana-de-açúcar. Infoteca-e
CABRAL, O. M. R.; PACKER, A. P.; ANDRADE, C. A. de; FREITAS, H. C.; RAMOS, N. P.; CUADRA, S. V..
bitstream/item/223266/1/2020PL-Cabral-Observacao-16980.pdf
Tipo: Capítulo em livro técnico (INFOTECA-E) Palavras-chave: Modelagem; Gases de efeito estufa; CO2; CH4; N2O; Cana-de-açúcar.
Ano: 2020 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1131852
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Phase Equilibria of the CH4-CO2 Binary and the CH4-CO2-H2O Ternary Mixtures in the Presence of a CO2-Rich Liquid Phase ArchiMer
Legoix, Ludovic; Ruffine, Livio; Donval, Jean-pierre; Haeckel, Matthias.
The knowledge of the phase behavior of carbon dioxide (CO2)-rich mixtures is a key factor to understand the chemistry and migration of natural volcanic CO2 seeps in the marine environment, as well as to develop engineering processes for CO2 sequestration coupled to methane (CH4) production from gas hydrate deposits. In both cases, it is important to gain insights into the interactions of the CO2-rich phase—liquid or gas—with the aqueous medium (H2O) in the pore space below the seafloor or in the ocean. Thus, the CH4-CO2 binary and CH4-CO2-H2O ternary mixtures were investigated at relevant pressure and temperature conditions. The solubility of CH4 in liquid CO2 (vapor-liquid equilibrium) was determined in laboratory experiments and then modelled with the...
Tipo: Text Palavras-chave: Gas hydrate; CH4; CO2-rich mixtures; Phase equilibria; Soave-Redlich-Kwong (SRK) cubic equation of state (EoS).
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00414/52538/53349.pdf
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Experimental Study of Mixed Gas Hydrates from Gas Feed Containing CH4, CO2 and N2: Phase Equilibrium in the Presence of Excess Water and Gas Exchange ArchiMer
Legoix, Ludovic; Ruffine, Livio; Deusner, Christian; Haeckel, Matthias.
This article presents gas hydrate experimental measurements for mixtures containing methane (CH 4 ), carbon dioxide (CO 2 ) and nitrogen (N 2 ) with the aim to better understand the impact of water (H 2 O) on the phase equilibrium. Some of these phase equilibrium experiments were carried out with a very high water-to-gas ratio that shifts the gas hydrate dissociation points to higher pressures. This is due to the significantly different solubilities of the different guest molecules in liquid H 2 O. A second experiment focused on CH 4 -CO 2 exchange between the hydrate and the vapor phases at moderate pressures. The results show a high retention of CO 2 in the gas hydrate phase with small pressure variations within the first hours. However, for our system...
Tipo: Text Palavras-chave: Gas hydrates; CH4; CO2; N-2; High-pressure experiments; Phase equilibrium; Gas exchange.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00452/56345/57935.pdf
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Enteric methane in grazing beef cattle under full sun, and in a silvopastoral system in the Amazon PAB
Frota,Marcílio Nilton Lopes da; Carneiro,Maria Socorro de Souza; Pereira,Elzânia Sales; Berndt,Alexandre; Frighetto,Rosa Toyoko Shiraishi; Sakamoto,Leandro Sannomiya; Moreira Filho,Miguel Arcanjo; Cutrim Júnior,José Antônio Alves; Carvalho,Geraldo Magela Côrtes.
Abstract: The objective of this work was to evaluate the quality of pasture and enteric methane (CH4) emission of Curraleiro Pé-duro x Nellore cattle in a pasture of Megathyrsus maximus 'Mombaça', both in full sun and in a consortium with babassu palms (Attalea spp.) in the Amazonian biome. The experimental design was completely randomized, with six steers per system, and the evaluations were done during the dry period (2015) and rainy period (2016). In comparison to forage in the full sun system, forage in the silvopastoral system showed, in the dry period, higher levels of crude protein, ether extract, total digestible nutrient, and in vitro digestible organic matter, and lower levels of dry matter, neutral detergent fiber, and total carbohydrate (TCHO)....
Tipo: Info:eu-repo/semantics/article Palavras-chave: CH4; Curraleiro Pé-duro; Greenhouse gases; Livestock farming; Nellore.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001101099
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รอยเท้าคาร์บอนจากระบบการปลูกข้าวที่สำคัญของประเทศไทย: ย้อนรอยการวัดการปลดปล่อยก๊าซมีเทนจากนาข้าวในประเทศไทย Thai Agricultural
Benjamas Rossopa; Chitnucha Buddhaboon; Kingkaew Kunket; Waraporn Wongboon; Apiwat Hantanapong; Samran Inthaleang; Noppadol Prayoonsuk.
Measurement of methane emission from rice production systems is a methodology for data collection of Carbon Footprint from rice production system. Four major rice production systems were defined for methane emission measurement in 2012, including upland rice, rainfed rice, irrigated rice with good agricultural practices (GAP) and irrigated rice with alternative wet and dry (AWD). Gas samples were taken one week interval and analyzed by Gas Chromatograph; GC-8A as soon as possible after collection. The research found that upland rice could absorb CH4 at the rate of 0.176 kg methane rai-1 season-1. Rainfed rice production system in Northeast Thailand emitted CH4 at the rate of 85.26 kg rai-1 season-1 under transplanting and 51.64 kg rai-1 season-1 under...
Tipo: PhysicalObject Palavras-chave: Carbon footprint; Emission; Rice production; Rice; Greenhouse gas; Irrigated rice; Rainfed rice; Upland rice; Methane emission; Good agricultural practices; CH4; Climatic factors; รอยเท้าคาร์บอน; การปลดปล่อยก๊าซมีเทน; การผลิตข้าว; ข้าว; ก๊าซเรือนกระจก; นาชลประทาน; นาน้ำฝน; นาที่สูง; ระบบนาข้าว; การจัดการแบบเกษตรดีที่เหมาะสม; การดูดซับก๊าซมีเทน; นาไร่; นาขั้นบันได; คาร์บอนไดออกไซด์; ก๊าซมีเทน.
Ano: 2013 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5714
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