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| Registros recuperados: 78 | |
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| Paula, Fabiana Luiza Matielo de; Escola Superior de Agricultura Luiz de Queiroz; Frizzone, José Antônio; USP-ESALQ, Piracicaba; Paula, Adalberto Luiz de; Escola Superior de Agricultura Luiz de queiroz; Dias, Carlos Tadeu dos Santos; Escola Superior de Agricultura Luiz de queiroz; Soares, Tales Miler; Universidade Federal do Recôncavo da Bahia. |
| A aplicação de CO2 via água de irrigação produz o rebaixamento do pH da solução do solo, causando variações na mobilidade dos nutrientes e consequentes efeitos na absorção. O objetivo deste trabalho foi analisar os efeitos de doses de dióxido de carbono (CO2), aplicadas via irrigação por gotejamento, na produção da pimenta Tabasco. O delineamento experimental foi o de blocos casualizados com quatro tratamentos e oito repetições. Os tratamentos foram quatro doses de CO2: 0 (T1), 451,95 (T2); 677,93 (T3) e 903,92 (T4) kg ha-1. Os frutos foram pesados e contados; o comprimento e o diâmetro de frutos foram obtidos com a média de 20 frutos por planta. Ocorreu efeito quadrático (p < 0,01) para as doses de CO2 sobre a produção e o efeito quadrático (p <... |
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Palavras-chave: Capsicum frutescens L.; Dióxido de carbono; Irrigação por gotejamento Capsicum frutescens L.; Carbon dioxide; Drip irrigation. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5374 |
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| Busari, Raheed Amao; Olaoye, Joshua Olanrewaju. |
| The objective of this study was to investigate the effects of castor biodiesel and its blends on the emission characteristics of a compression ignition engine. The research work was carried out on a single cylinder, four-stroke, water cooled, direct injection diesel engine by using biodiesel made from castor oil, compared with conventional diesel. The fuels used in the analyses are B5, B10, B15, B20, B25, B50, B100 and convectional diesel. The compression ignition engine was operated by varying the loading conditions (0 – 6kW) in a step of 1kW. Based on the parameters measured, detailed analyses were carried out on five regulated exhaust emissions i.e. NOX, CO, CO2, O2, and HC. The results clearly indicated that the engine running with biodiesel and their... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Compression ignition engine; Castor biodiesel; Nitrogen oxides; Carbon dioxide; Oxygen and Carbon monoxide. |
| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5598 |
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| MARQUES NETTO,CATERINA G.C.; ANDRADE,LEANDRO H.; TOMA,HENRIQUE E.. |
| ABSTRACT The conversion of carbon dioxide into important industrial feedstock is a subject of growing interest in modern society. A possible way to achieve this goal is by carrying out the CO2/methanol cascade reaction, allowing the recycle of CO2 using either chemical catalysts or enzymes. Efficient and selective reactions can be performed by enzymes; however, due to their low stability, immobilization protocols are required to improve their performance. The cascade reaction to reduce carbon dioxide into methanol has been explored by the authors, using, sequentially, alcohol dehydrogenase (ADH), formaldehyde dehydrogenase (FalDH), and formate dehydrogenase (FDH), powered by NAD+/NADH and glutamate dehydrogenase (GDH) as the co-enzyme regenerating system.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbon dioxide; Enzyme cascade-reaction; Methanol production; Superparamagnetic nanoparticles; Enzymatic catalysis. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000200593 |
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| COELHO JUNIOR,ALOISIO; PARRA,JOSE R.P.. |
| Eggs of Anagasta kuehniella (Zeller 1879) are widely used for mass rearing of Trichogramma spp. and other parasitoids and predators, largely commercialized in many countries. The aim of this study is to evaluate the effect of carbon dioxide (CO2) originated from larval metabolism on the biological parameters of A. kuehniella. For that purpose, we assess the production of carbon dioxide (CO2) per rearing tray of A. kuehniella and the effect of CO2 on the viability of egg-to-adult period and oviposition of A. kuehniella. Results allow to estimate that a rearing tray, containing 10,000 larvae between the 4th and 5th instars, produces an average of 30.67 mL of CO2 per hour. The highest egg production of A. kuehniella was obtained when the larvae were kept in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mass rearing; Factitious host; Abiotic factor; Carbon dioxide. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200823 |
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| SOTO,CAROLINA R; ARROYO,JORGE; ALCAYAGA,JULIO. |
| Acetylcholine (ACh), adenosine 5'-triphosphate (ATP) and sodium cyanide (NaCN) activate petrosal ganglion (PG) neurons in vitro, and evoke ventilatory reflexes in situ, which are abolished after bilateral chemosensory denervation. Because in our previous experiments we superfused the isolated PG with solutions free of CO2 /HCO3¯ buffer, we studied its effects on the PG responses evoked in vitro. PGs from adult cats were superfused at a constant pH, with HEPES-supplemented (5 mM) saline with or without CO2 /HCO3¯ (5% / 26.2 mM) buffer, and carotid (sinus) nerve frequency discharge (CN) recorded. Increases in CN evoked by ACh, ATP and NaCN in CO2-free saline were significantly reduced (P<0.05, Wilcoxon test) when CO2 / HCO3¯ was present in the... |
| Tipo: Journal article |
Palavras-chave: Petrosal Ganglion; Carotid sinus nerve; Carbon dioxide; Bicarbonate; Acetylcholine; Adenosine 5'- triphosphate; Cyanide. |
| Ano: 2002 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602002000300010 |
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| Carli,Marcelo De; Bresolin,Bruna; Noreña,Caciano Pelayo Zapata; Lorini,Irineu; Brandelli,Adriano. |
| The effect of modified atmosphere packaging on the mortality of Sitophilus spp. in organic maize grain was studied. Maize grains were packed with five different atmospheres consisting of 20% O2, or 20, 40, 60, 80% CO2 with remaining N2. The packages were stored for 30 days at 26°C. CO2 and O2 concentrations were monitored inside the packages during the storage. The moisture content, titratable acidity and pH were analysed on the first and thirtieth day. At 5, 15 and 30 days of storage no significant differences were observed in the percentages of dead insects when CO2 was used. The results of progeny indicated that from the fifth day the number of emerging insects was low at 20, 60 and 80% CO2. Complete inhibition of the insects was achieved with 30 days... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbon dioxide; Modified atmosphere; Insect mortality. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000600024 |
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| Morais,Etiele Greque de; Cassuriaga,Ana Paula Aguiar; Callejas,Nicolás; Martinez,Natalia; Vieitez,Ignacio; Jachmanián,Iván; Santos,Lucielen Oliveira; Morais,Michele Greque de; Costa,Jorge Alberto Vieira. |
| ABSTRACT Spirulina is a microalgal genre that has the capacity to produce various bioproducts with applications in several areas including the energy sector. The study aimed to assess the ability of CO2 biofixation, biodiesel and other biocompounds production by Spirulina sp LEB 18 cultured in air-lift photobioreactor. The microalgae presented a rich macronutrient composition: protein (47.3%), carbohydrates (13.4%) and a high lipid content (32.7%) in a media with nitrogen reduction, CO2 using air-lift photobiorector. Furthermore, 160 mg.L.d-1 of CO2 was biofixed, generating a maximum biomass yield of 0.02 g.L.d-1. The lipids evaluated for biodiesel production presented a theoretical yield of 19.8% for in situ transesterification and 47.9% for conventional... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofuels; Carbon dioxide; Microalgae; Photobiorefinary; Biocompounds. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100703 |
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| Garcia,Tiago Resende; Rezende,Adalgiza Souza Carneiro de; Santiago,Juliano Martins; Almeida,Fernando Queiroz de; Fonseca,Mayara Gonçalves; Munõz,Ana. |
| The Mangalarga Marchador (MM) breed, valued for its marcha pace, has been excelling in functional activities such as marcha course. Considering the lack of information about sports physiology of the marcha horses, the development of training protocols and physical testing becomes essential and, in this context, the concentrations of blood gases and electrolytes provide additional information for the monitoring of metabolic changes induced by exercise. The goal of the study was to assess the hemogasometric responses and blood electrolyte concentration in MM mares during maximal effort treadmill tests carried out before and after training (trial 1) and between a maximal effort treadmill test and an incremental field test (trial 2). The trials assessed plasma... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Equine; Bicarbonate; Carbon dioxide; Oxygen. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000600009 |
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| Walker, Brian; CSIRO Sustainable Ecosystems; Brian.Walker@csiro.au; Steffen, Will; ; Will.Steffen@dwe.csiro.au. |
| Global change is the net effect of individual and interactive effects of changes in land use, atmospheric composition, biological diversity, and climate. A synthesis of the past six years' activities of the Global Change and Terrestrial Ecosystems project of the IGBP (International Geosphere-Biosphere Programme) deals with global change effects as ecosystem responses and living with global change. Ecosystem responses are considered in terms of changes in function and vegetation composition/structure. Field experiments of elevated CO2 effects on aboveground biomass show, on average, a positive effect on biomass, ranging from -20% to +80%. Some early predictions of CO2 effects (C3 vs. C4 plants, N-fixers, C:N in litter) are not generally supported, and it... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Agriculture; Biomes; Carbon dioxide; Climate; Dynamics; Ecosystem functioning; Global change; Impacts; Land use; Terrestrial biosphere; Vegetation changes.. |
| Ano: 1997 |
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| Registros recuperados: 78 | |
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