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| Registros recuperados: 102 | |
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| Portela Díaz, Diego Felipe. |
| Actualmente se necesitan alternativas que disminuyan la emisión de metano asociada a la producción ganadera, una opción, es el uso de plantas que contienen metabolitos secundarios y causan la desfaunación ruminal. El presente estudio tuvo como objetivo principal, evaluar la capacidad desfaunante in vitro de diferentes plantas y subproductos agrícolas, así como su efecto en algunas variables de fermentación ruminal, población de microorganismos, producción de dióxido de carbono y metano. En la primera fase, se evaluaron 10 plantas y 6 subproductos agrícolas. El follaje del chicalote blanco (Argemone ochroleuca) y el subproducto, cascabillo de café (Coffea arabica) fueron seleccionados, ya que presentaron la mayor capacidad desfaunante. A la 96 h de... |
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Palavras-chave: Metano; Desfaunación; Protozoarios; Coffea arabica; Argemone ochroleuca; Methane; Defaunation; Protozoa; Ganadería; Maestría. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1711 |
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| Sanjay B. Shah; NC State University; Praveen Kolar; Biological and Agricultural Engineering Department, North Carolina State University, Raleigh, NC 27695, USA. |
| Additives can reduce gaseous emissions from swine waste lagoons and pits. We have demonstrated for the first time that an additive has the potential to reduce methane emission from an anaerobic swine lagoon. ManureMax®, a humate product was evaluated for its ability to reduce gas and odor emissions from swine anaerobic lagoon and barn flush-water. Four treatments, Control (no additive), Low (label dosage), Medium (50% higher than label dosage), and High (200% higher than label dosage) were applied to inclined pipes installed in a swine lagoon. While the Medium and High treatments were not effective, the Low treatment reduced methane, 2-butanone, and tetrahydrofuran concentrations by 34%, 44%, and 57%, respectively vs. the Control in the pipe headspace.... |
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Palavras-chave: Agricultural engineering; Environmental engineering; Air quality; Greenhouse gases; Animal waste Hog; Mesocosm-scale; Methane; 2-butanone; Tetrahydrofuran; Volatile fatty acids; Toluene. |
| Ano: 2012 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2111 |
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| SASAKI, Naoki; FUKUNAKA, Morito; YAMADA, Haruo; SENBA, Hiroyuki; HIGUCHI, Tohru; 佐々木, 直樹. |
| Techniques for measuring hydrogen (H2) and methane (CH4) levels in breaths were assessed in horses with gastrointestinal (GI) diseases. A total of 31 horses were studied: 11 healthy horses (Group A), 10 horses with GI diseases (Group B), and 10 horses with diseases without GI involvement (Group C). Expired gases were measured using gas chromatography. CH4 levels in Group A were significantly lower than those in Group B. In Group B, CH4 levels were significantly higher after treatment. Fluctuations in H2 and CH4 levels in breath were associated with changes in GI function. |
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Palavras-chave: Equine; Hydrogen; Methane. |
| Ano: 2006 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3102 |
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| Blouin, Arthur; Imbert, Patrice; Sultan, Nabil; Callot, Jean-paul. |
| The morphology of mud volcanoes (MV) has been extensively studied over the last few decades. Although recent research has begun to focus on deep processes and structures, little is known about mud generation mechanisms. This study aims to investigate the feeder system and formation of an active kilometer‐scale MV by relying on a 3‐D seismic survey and an in‐situ dataset on the Absheron anticline (South Caspian Basin). Seismic data show a depleted area in the Anhydritic Surakhany Formation (ASF), whose mineralogical composition fits with surface mud. Well data show that the ASF is a succession of evaporitic beds and low temperature shales near its fracture pressure. Biostratigraphic analysis confirms a Pliocene origin for the mud, suggesting that the ASF... |
| Tipo: Text |
Palavras-chave: Mud volcano; Pore pressure; Methane; Modeling; Seismic. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00481/59304/62057.pdf |
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| Bernoux,Martial; Branca,Giacomo; Carro,Aude; Lipper,Leslie; Smith,Garry; Bockel,Louis. |
| EX-ACT (EX-Ante Carbon-balance Tool) is a tool developed by the Food and Agriculture Organization of the United Nations (FAO). It provides ex-ante measurements of the mitigation impact of agriculture and forestry development projects, estimating net C balance from GHG emissions and Carbon (C) sequestration. EX-ACT is a land-based accounting system, measuring C stocks, stock changes per unit of land, and CH4 and N2O emissions expressed in t CO2-eq per hectare and year. The main output of the tool is an estimation of the C-balance associated with the adoption of improved land management options, as compared with a "business as usual" scenario. EX-ACT has been developed using primarily the IPCC 2006 Guidelines for National Greenhouse Gas Inventories,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mitigation; Nitrous oxide; Methane; C sequestration; Land use change and forestry. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000100005 |
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| NIQUINI,GABRIELA R.; SILVA,SUZIMARA R.; COSTA JUNIOR,ESLY F.; COSTA,ANDRÉA O.S.. |
| Abstract: In this study, several linear regression models were tested to predict the cumulative 30-day methane yield produced in mesophilic solid-state anaerobic digestion, employing diverse lignocellulosic biomass sources. Data collected from 13 studies were utilized, totalizing 86 experimental points, divided into regression and validation. Models containing higher order terms, the inverse of variables and interactions among all eleven input variables were tested. Simple linear models utilizing a single variable were unable to describe the methane production, giving an R² lower than 0.37. However, combinations of multiple variables and its inverses as only independent variable permitted an increase in simple linear models predictive capacity up to 63% of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lignocellulosic biomass; Linear regression; Methane; Polynomial models; Solid-state anaerobic digestion. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700865 |
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| 梅津, 一孝; 山縣, 真人; 岸本, 正; 谷, 昌幸; 林, 峰之; 三崎, 卓也. |
| The purpose of this study was to evaluate the effect of anerobically co-digested dairy manure and food processing wastes as an organic fertilizer, and to investigate the changes in soil nitrogen and grain yield of winter wheat (Hokushin) comparing digested dairy manure with chemical fertilizer. By the incubation test, it was clear that the NH4-N was almost converted into the NO3-N for four weeks. Over the period of 101 days, 15% of inorganic N was accumulated in the soil. Between grain yields where co-digested dairy manure and chemical fertilizer were applied, there were no significant difference, but protein contents in grain were higher in co-digested manure applied than chemical fertilizer one (p<0.05). |
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Palavras-chave: バイオガス; メタン; 消化液; 圃場還元; 秋蒔き小麦; Biogas; Methane; Digested slurry; Field application; Winter wheat. |
| Ano: 2003 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4513 |
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| Villar-muñoz, Lucía; Vargas-cordero, Iván; Bento, Joaquim; Tinivella, Umberta; Fernandoy, Francisco; Giustiniani, Michela; Behrmann, Jan; Calderón-díaz, Sergio. |
| Large amounts of gas hydrate are present in marine sediments offshore Taitao Peninsula, near the Chile Triple Junction. Here, marine sediments on the forearc contain carbon that is converted to methane in a regime of very high heat flow and intense rock deformation above the downgoing oceanic spreading ridge separating the Nazca and Antarctic plates. This regime enables vigorous fluid migration. Here, we present an analysis of the spatial distribution, concentration, estimate of gas-phases (gas hydrate and free gas) and geothermal gradients in the accretionary prism, and forearc sediments offshore Taitao (45.5°–47° S). Velocity analysis of Seismic Profile RC2901-751 indicates gas hydrate concentration values <10% of the total rock volume and extremely... |
| Tipo: Text |
Palavras-chave: BSR; Gas hydrate; Methane; Seepage; Active margin; Chile Triple Junction. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00475/58678/61173.pdf |
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| Xavier, Keyla Vitoria Marques; Souza, Eden Silva e; Santos, Erick de Aquino; Diniz, Michely Correia. |
| Methanogenic archaeas are found in aquatic and terrestrial environments and are fundamental in the conversion of organic matter into methane, a gas that has a potential use as renewable source of energy, which is also considered as one of the main agents of the greenhouse effect. The vast majority of microbial genomes can be identified by a conservative molecular marker, the 16S ribosomal gene. However, the mcrA gene have been using in studies of methanogenic archaea diversity as an alternative marker, highly conserved and present only in methanogens. This gene allows the expression of the enzyme Methyl-coenzyme M reductase, the main agent in converting by-products of anaerobic digestion into methane. In this context, we aimed to study the genetic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heterozygosity; Microbiomes; Methane; Anaerobic; Arlerquin; Databases heterozygosity; Microbiomes; Methane; Anaerobic; Arlerquin; Databases.. |
| Ano: 2020 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/49877 |
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| Ondreas, Helene; Olu, Karine; Dupre, Stephanie; Scalabrin, Carla; Alix, Anne-sophie; Garrocq, Clément; Ruffine, Livio. |
| The Sea of Marmara hosts part of the North Anatolian Fault as an active submarine strike-slip fault. This area has suffered numerous earthquakes and presents a major seismic risk. Although the Sea of Marmara has been studied for many years, the link between geological morphostructures, the nature of fluids and biological communities is still rarely described. During the Marsite cruise (November 2014), dives with Remotely Operated Vehicle (ROV) VICTOR 6000 focused on detailed seafloor explorations of four different areas: the Central and Western highs and the Tekirdağ and Çinarcik basins. Based on 130 h of in situ videos, high-resolution seafloor mapping of seeps was conducted, emphasizing their significant geological and biological diversity from one... |
| Tipo: Text |
Palavras-chave: Sea of Marmara; Cold seeps; Fluids; Seismogenic faults; Chemosynthetic fauna; Methane. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00624/73623/73040.pdf |
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| Kebreab,Ermias; Strathe,Anders; Fadel,James; Moraes,Luis; France,James. |
| The growing global demand for meat and particularly in countries such as Brazil is expected to increase intensive animal production. Consequently the main pollutants of interest are nitrogen (N), phosphorus (P) and greenhouse gases (GHG). Nitrogen can be a problem through nitrate leaching to water bodies, ammonia, and nitrous oxide emissions to air. Phosphorus loading in soil from manure application can be the main issue due to the tendency of P to accumulate in soil and leach to groundwater and rivers. The sources of agricultural GHG emissions include methane from enteric fermentation, manure storage and spreading, and nitrous oxide mainly from application of manure on land. Dietary manipulation has proven to be an effective tool to reduce... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Methane; Nitrogen; Phosphorus; Pollution; Ruminants. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001300050 |
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| Moreira, Milenna Nunes; Silva, Aderbal Marcos de Azêvedo; Carneiro, Heloisa; Bezerra, Leilson Rocha; Morais, Raissa Kiara Oliveira de; Medeiros, Fabiola Franklin de. |
| This study aimed to determine the in vitro degradability of dry matter and the total gas production of oil seed press cake from biodiesel production (Gossypium hirsutum L., Helianthus annuus L., Ricinus communis, Moringa oleífera L. and Pinhão manso curcas L.) at four different levels of replacement (0, 30, 50, and 70%) for cane sugar (Saccharum officinarum RB.) in ruminant feed. Inocula were prepared using the ruminal fluid of three Holstein cows, and data were collected after 48 hours of incubation. The byproducts of Moringa had the highest degradability, and castor presented the lowest values at all evaluated levels of replacement. Castor bean byproduct showed the highest total gas production, cotton showed the lowest production, and the byproduct of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fermentation; Ruminant; Alternative foods; Methane. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/23950 |
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| Homem Junior,Antonio Carlos; Ezequiel,Jane Maria Bertocco; Perez,Henrique Leal; Almeida,Marco Tulio Costa; Paschoaloto,Josimari Regina; Carvalho,Vanessa Barbosa de; Cremasco,Leonardo Fernandes; Costa,Macella Borsonello da. |
| Methodological variations in the amount of sample incubated and the type of rumen fluid used are commonly observed. This study evaluated the effect of three sample amounts (0.6, 1.3 or 2.6g DM 100mL-1 of rumen fluid) incubated in rumen fluid buffered (BRF-buffered rumen fluid) or not (PRF-pure rumen fluid) on total gas volume (TV), methane (CH4) production, dry matter degradation (DM Deg) and final pH of corn silage incubated in vitro. The highest DM Deg was reached with the lowest amounts of sample (0.6 and 1.3g of DM 100mL-1 of rumen fluid). The sample amount of 2.6g associated with PRF reduced CH4 production (P<0.05), compared with the amounts of 0.6 and 1.3g DM 100mL-1, which had similar CH4 production (P>0.05). The use of BRF caused no effect on... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Degradation; Gas; Incubation; Methane; PH. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001202229 |
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| Registros recuperados: 102 | |
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