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| Registros recuperados: 75 | |
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| Shih, Jhih-Shyang; Burtraw, Dallas; Palmer, Karen L.; Siikamaki, Juha. |
| The animal husbandry industry is a major emitter of methane, which is an important greenhouse gas. The industry is also a major emitter of ammonia, which is a precursor of fine particulate matter, arguably the number-one environment-related public health threat facing the nation. We present an integrated process model of the engineering economics of technologies to reduce methane and ammonia emissions at dairy operations in California. Three policy options are explored: greenhouse gas offset credits for methane control, particulate matter offset credits for ammonia control, and expanded net metering policies to provide revenue for the sale of electricity generated from captured methane gas. Individually, any of these policies appears to be sufficient to... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Methane; Ammonia; Carbon dioxide; Greenhouse gases; Climate change; Offset; Particulate matter; Net metering; Environmental policy; CAFO; Manure management; Biodigester; Electricity; Global warming; Cost-benefit; Incentive approach; Livestock Production/Industries; Q2; Q4; Q53. |
| Ano: 2006 |
URL: http://purl.umn.edu/10749 |
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| Burke, Paul J.. |
| The concept underpinning the Environmental Kuznets Curve is that economic growth results in reduced pollution in the long run. In this report, an extension of Andreoni and Levinson’s (2001) theoretical model is presented. It demonstrates that an Environmental Kuznets Curve relationship can occur because high incomes allow more adoption of low-emission technologies at higher income levels. Evidence on the determinants of carbon dioxide emissions changes for OECD countries over the period 1961-2004 is presented. It highlights the importance of technology adoption in explaining whether countries have achieved emissions reductions at the same time as experiencing long-run economic growth. However, it is shown that technology adoption is affected by policy... |
| Tipo: Report |
Palavras-chave: Economic growth; Pollution; Carbon dioxide; Environmental Kuznets curve Research; Environmental Economics and Policy. |
| Ano: 2008 |
URL: http://purl.umn.edu/94804 |
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| Vercellino,R do A; Moura,DJ de; Nääs,I de A; Maia,AP de A; Medeiros,BBL; Salgado,DDA; Carvalho,TRM de. |
| Brazilian poultry production is prospering, and negative-pressure broiler houses are increasingly used to improve environmental control. One important issue is the color of the side curtains used in such houses due to the influence of colors on broiler behavior. This study aimed at evaluating the influence of different curtain color on the welfare of 7-day-old broilers, considering luminosity and other environmental parameters. Chicks were housed in three different negative-pressure broiler houses either with black (T1), blue (T2), or yellow (T3) side curtains. House environment (luminosity, dry-bulb temperature, air relative humidity, air velocity, and gas emissions) and the behavior of chicks on day 7 after housing were evaluated in three consecutive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ammonia; Carbon dioxide; Luminosity; Behavior; Broiler chicks. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000300002 |
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| Okur,N. |
| ABSTRACT This study investigated the effects of incubator carbon dioxide (CO2) and oxygen (O2) levels, and egg weight (EW) on embryo mortality (EM) and hatchability of fertile eggs (HFE). A total of 1920 hatching eggs were obtained from a middle-aged (41 weeks) ROSS 308 broiler breeder flock. The eggs were classified according to EW as heavy (69.63 ± 0.09 g), medium (65.20 ± 0.04 g) and light (61.11 ± 0.08 g) and randomly allocated to four separate identical incubators. To these incubators, four different incubator ventilation programmes (IVP) classified as control (C; 0.7% CO2 and 20.9% O2), high CO2 (HC; 1.1% CO2 and 20.3% O2), high O2 (HO; 0.6% CO2 and 22.0% O2), and high CO2 + O2 (HCO; 0.9% CO2 21.0% O2) were applied, and EM and HFE were examined. IVP... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler; Carbon dioxide; Egg weight; Incubation; Oxygen. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000300310 |
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| Chiaradia,Jonas Jacob; Chiba,Marcio Koiti; Andrade,Cristiano Alberto de; Carmo,Janaína Braga do; Oliveira,Claudeir de; Lavorenti,Arquimedes. |
| Organic residue application into soil alter the emission of gases to atmosphere and CO2, CH4, N2O may contribute to increase the greenhouse effect. This experiment was carried out in a restoration area on a dystrophic Ultisol (PVAd) to quantify greenhouse gas (GHG) emissions from soil under castor bean cultivation, treated with sewage sludge (SS) or mineral fertilizer. The following treatments were tested: control without N; FertMin = mineral fertilizer; SS5 = 5 t ha-1 SS (37.5 kg ha-1 N); SS10 = 10 t ha-1 SS (75 kg ha-1 N); and SS20 = 20 t ha-1 SS (150 kg ha-1 N). The amount of sludge was based on the recommended rate of N for castor bean (75 kg ha-1), the N level of SS and the mineralization fraction of N from SS. Soil gas emission was measured for 21... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Residue; Nitrogen; Carbon dioxide; Nitrous oxide; Methane. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000600035 |
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| Camargo,Roberto da Silva; Lopes,Juliane F. S.; Forti,Luiz Carlos. |
| Energetic cost of digging behavior in workers of the leaf-cutting ant Atta sexdens (Fabricius). During nest excavation, leaf-cutting ant workers undergo reduction in their body reserve, particularly carbohydrates. In order to estimate the energetic cost of digging, groups of 30 workers of the leaf-cutting ant Atta sexdens were sealed in a hermetic chamber for 24, 48 and 72 hours, with and without soil for digging, and had the CO2 concentration measured using respirometric chambers as well as volume of soil excavated (g). As expected, the worker groups that carried out soil excavation expelled more carbon dioxide than the groups that did not excavate. Therefore, a worker with body mass of 9.65 ± 1.50 mg dug in average 0.85 ± 0.27 g of soil for 24 hours,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Attini; Carbon dioxide; Insecta; Formicidae; Nest. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262013000400009 |
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| Sampaio,Flavia D.F.; Silva-de-Assis,Helena C.; Bettim,Franciele L.; Fávaro,Luís F.; Freire,Carolina A.. |
| ABSTRACT Pomacentridae is a common family in the aquarium fish trade. Most species are harvested from nature. Here we evaluate the following water parameters in the pomacentrid sergeant major, Abudefduf saxatilis (Linnaeus, 1758), to assess their stress level during a 24, 48, and 72 hours transport: dissolved oxygen (DO), total ammonia, and pH. In addition, we evaluated the following physiological parameters: plasma osmolality, muscle water content, blood glucose, and the enzyme activities of the branchial carbonic anhydrase (CA), the hepatic glutathione S-transferase (GST), catalase (CAT), and superoxide dismutase (SOD). The mortality of fish measuring >6 cm total length was 22%, while no mortality was observed for fish measuring <6 cm. The pH of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ammonia; Aquarium trade; Carbon dioxide; Fish conservation; PH. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702019000100306 |
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| Osorio-Teran,Amada Isabel; Mendoza-Martínez,Germán David; Miranda-Romero,Luis Alberto; Martínez-Gomez,Daniel; Hernández-García,Pedro Abel; Martínez-García,José Antonio. |
| ABSTRACT An evaluation of the effects of monensin and calcium propionate on the in vitro kinetics of gas production, digestibility, carbon dioxide, and minor gas production on different days was performed using the ruminal fluid from eight Suffolk lamb donors, after receiving additives for 1, 10, and 20 days. Treatments consisted of a control ration of 40% grain; 30 mg/kg of monensin in a diet with 40% grain; 10 g/kg calcium propionate in a diet with 30% grain; and the combination of both additives in a diet with 30% grain. The gas production was measured up to 72 h of incubation and all incubation procedures were repeated three times on days 1, 10, and 20. On incubation day 20, the volume and production of methane and minor gases were measured. There was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Additive feeding; Carbon dioxide; Ionophore; Methane; Rumen fermentation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000400348 |
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| Santos,Roberta Machado; Voltolini,Tadeu Vinhas; Angelotti,Francislene; Aidar,Saulo de Tarso; Chaves,Agnaldo Rodrigues de Melo. |
| The objective of the present trial was to evaluate the productive and morphogenetic characteristics of buffel grass subjected to different air temperatures and CO2 concentrations. Three cultivars of buffel grass (Biloela, Aridus and West Australian) were compared. Cultivars were grown in growth chambers at three temperatures (day/night): 26/20, 29/23, and 32/26 °C, combined with two concentrations of CO2: 370 and 550 µmol mol-1. The experimental design was completely randomized, in a 3 × 3 × 2 factorial arrangement with three replications. There were interactions between buffel grass cultivars and air temperatures on leaf elongation rate (LER), leaf appearance rate (LAR), leaf lifespan (LL) and senescence rate (SR), whereas cultivars vs. carbon dioxide... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbon dioxide; Cenchrus ciliaris; Climate change. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000800404 |
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| Qiao,Junyi; Tan,Zhiliang; Wang,Min. |
| Enteric methane (CH4) emissions in ruminants have attracted considerable attention due to their impact on greenhouse gases and the contribution of agricultural practices to global warming. Over the last two decades, a number of approaches have been adopted to mitigate CH4 emissions. However, the mechanisms of methanogenesis have still not been fully defined. According to the genome sequences of M. ruminantium in the rumen and of M. AbM4 in the abomasum, the pathways of carbon dioxide (CO2) reduction and formate oxidation to CH4 have now been authenticated in ruminants. Furthermore, in the light of species or genera description of methanogens, the precursors of methanogenesis discovered in the rumen and research advances in related subjects, pathways of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Methanogenesis; Carbon dioxide; Formate; Acetate; Methanol. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000500013 |
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| Teixeira,Luís Gustavo; Corradi,Mariana Marotti; Fukuda,Adrian; Panosso,Alan Rodrigo; Reicosky,Donald; Lopes,Afonso; La Scala Jr.,Newton. |
| Appropriate management of agricultural crop residues could result in increases on soil organic carbon (SOC) and help to mitigate gas effect. To distinguish the contributions of SOC and sugarcane (Saccharum spp.) residues to the short-term CO2-C loss, we studied the influence of several tillage systems: heavy offset disk harrow (HO), chisel plow (CP), rotary tiller (RT), and sugarcane mill tiller (SM) in 2008, and CP, RT, SM, moldboard (MP), and subsoiler (SUB) in 2009, with and without sugarcane residues relative to no-till (NT) in the sugarcane producing region of Brazil. Soil CO2-C emissions were measured daily for two weeks after tillage using portable soil respiration systems. Daily CO2-C emissions declined after tillage regardless of tillage system.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil respiration; Carbon dioxide; Emission after tillage; Soil organic carbon. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000500007 |
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| Registros recuperados: 75 | |
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