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Registros recuperados: 21
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Activity and Stability of Dispersed Multi Metallic Pt-based Catalysts for CO Tolerance in Proton Exchange Membrane Fuel Cell Anodes Anais da ABC (AABC)
HASSAN,AYAZ; TICIANELLI,EDSON A..
ABSTRACT Studies aiming at improving the activity and stability of dispersed W and Mo containing Pt catalysts for the CO tolerance in proton exchange membrane fuel cell (PEMFC) anodes are revised for the following catalyst systems: (1) a carbon supported PtMo electrocatalyst submitted to heat treatments; (2) Pt and PtMo nanoparticles deposited on carbon-supported molybdenum carbides (Mo2C/C); (3) ternary and quaternary materials formed by PtMoFe/C, PtMoRu/C and PtMoRuFe/C and; (4) Pt nanoparticles supported on tungsten carbide/carbon catalysts and its parallel evaluation with carbon supported PtW catalyst. The heat-treated (600 oC) Pt-Mo/C catalyst showed higher hydrogen oxidation activity in the absence and in the presence of CO and better stability,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heat treatment; CO tolerance; Stability; Carbides; Quaternary catalysts.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000200697
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Caracterização energética de pellets in natura e torrificados produzidos com madeira residual de Pinus PFB - Pesquisa Florestal Brasileira
Protásio, Thiago de Paula; Trugilho, Paulo Fernando; de Siqueira, Humberto Fauller; de Melo, Isabel Cristina Nogueira Alves; Andrade, Carlos Rogério; Guimarães Junior, José Benedito.
O objetivo deste estudo foi avaliar pellets torrificados e in natura,produzidos a partir da madeira residual de Pinus, destinados ao uso bioenergético. A compactação da madeira residual de Pinus sp. oriunda de serraria foi realizada em uma peletizadora com matriz plana de 8 mm. As torrefações foram realizadas em forno elétrico, tipo mufla, estabilizado em temperaturas finais de 220 °C e 250 °C por 30 min. Foram determinadas as seguintes propriedades nos pellets: densidades aparente e energética unitárias, densidades a granel e energética do granel, composição química imediata (materiais voláteis, cinzas e carbono fixo), poder calorífico superior e umidade. Observou-se aumento do poder calorífico superior e redução do teor de umidade nos pellets...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Recursos Florestais; Engenharia Florestal; Energia da Biomassa Florestal. Densificação; Tratamento térmico; Biomassa florestal; Energia Densification; Heat treatment; Forestry biomass; Energy.
Ano: 2015 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/843
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Characterization of soybean cultivars genetically improved for human consumption. Repositório Alice
RIGO, A. A.; DAHMER, A. M.; STEFFENS, C.; STEFFENS, J.; CARRÃO-PANIZZI, M. C..
2015
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Soybean grains; Isoflavones; Kunitz trypsin inhibitor; Protein solubility; Lipoxygenases; Heat treatment.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1018826
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Diferentes tratamentos físicos na germinação de sementes de guaraná. Repositório Alice
FRAZAO, D. A. C.; FIGUEIREDO, F. J. C.; POPINIGIS, F.; CORREA, M. P. F.; KATO, O. R..
bitstream/item/198655/1/FL-04411.pdf
Tipo: Outras publicações científicas (ALICE) Palavras-chave: Fruit; Processing; Aquecimento; Embebição; Fruta; Germinação; Guaraná; Paullinia Cupana; Processamento; Resfriamento; Semente; Cooling; Germination; Heat treatment; Seeds.
Ano: 1975 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/378579
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Efeitos de genótipos, ambientes e de tratamentos hidrotérmicos na concentração de isoflavonas agliconas em grãos de soja. Repositório Alice
CARRÃO-PANIZZI, M.C.; SIMÃO, A.S.; KIKUCHI, A..
O objetivo deste trabalho foi avaliar os efeitos de tratamentos hidrotérmicos, da variabilidade genética e de ambientes no teor de isoflavonas agliconas em grãos de soja [Glycine max (L.) Merrill]. O estudo foi realizado com as cultivares de soja BR 36, FEPAGRO RS-10 e BRS 155, cultivadas em Londrina, em Capanema e em Palmas, PR, na safra 1999/2000, mediante tratamentos hidrotérmicos de 40, 50 e 60°C por 12 e 18 horas. As maiores concentrações de isoflavonas totais (280 mg/100 g) foram observadas nos grãos colhidos em Palmas, onde a temperatura média durante o enchimento de vagens foi mais baixa (19ºC). Em Londrina (23ºC), houve menor concentração de isoflavonas (140 mg/100 g). A cultivar BRS 155 apresentou o maior teor de isoflavonas totais em Palmas e em...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Glycine max; Glicosídeo; Alimento funcional; Tratamento térmico; Glycosides; Functional foods; Heat treatment.
Ano: 2003 URL: http://www.alice.cnptia.embrapa.br/handle/doc/109172
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Effect of preheat treatment, chemical stimulant and moisture regime on weed seed germination under controlled and lowland rice soil conditions International Rice Research Institute
Jayawardane, Koshala J.D.M..
124 l. : ill. Thesis (M.S.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Rice soils; Lowlands; Weeds; Seed germination; Heat treatment; Soil water regimes.
Ano: 1989 URL: http://hdl.handle.net/123456789/1135
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Effect of thermal treatments on technological properties of wood from two Eucalyptus species Anais da ABC (AABC)
Cademartori,Pedro Henrique G. de; Missio,André L.; Mattos,Bruno D.; Gatto,Darci A..
The effect of thermal treatments on physical and mechanical properties of rose gum and Sydney blue gum wood was evaluated. Wood samples were thermally modified in a combination: pre-treatment in an autoclave (127°C - 1h) and treatment in an oven (180-240°C - 4h); and only treatment in an oven at 180-240°C for 4h. Chemical changes in the structure of woods were evaluated through infrared spectroscopy. Evaluation of physical properties was performed through mass loss, specific gravity, equilibrium moisture content and dimensional stability tests. Surface changes were analyzed through apparent contact angle technique and static bending tests were carried out to evaluate the mechanical behavior. Use of pre-treatment in autoclave affected the properties...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hygroscopicity; Chemical changes; Wettability; Heat treatment; Mechanical strength.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100471
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Effects of heat treatments and edible shell coatings on egg quality after storage at room temperature Ciênc. Tecnol. Aliment.
OLIVEIRA,Cristina Henrique; BOIAGO,Marcel Manente; GUARAGNI,Andréia.
Abstract The objective of this study was to evaluate the effect of thermal treatments using different water temperatures and immersion times, as well as the application of eggshell coatings using edible materials on eggshell quality after storage for 4 weeks at room temperature (22.8 ± 4.4 °C). A total of 180 brown fresh eggs were distributed in a completely randomized design with six treatments and five replicates of six eggs each. The treatments consisted of a control group without any treatment (T1), three groups treated thermally: 56 °C/32 minutes (T2); 56 °C/20 minutes (T3); 56 °C/10 minutes (T4); and two groups with gelatin 2% (T5) and 5% NaCl solution (T6). After storage, it was found that the heat treatments at 56 °C for 10, 20 and 32 minutes...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Albumen; Edible coating; Haugh unit; Heat treatment; Lipid peroxidation.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612020005005203
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Heat treatment effects on ACC oxidase activity of 'Keitt' mangoes Braz. J. Plant Physiol.
Bender,Renar João; Seibert,Eduardo; Brecht,Jeffrey K..
With the use of ethylene dibromide for mango disinfestation being ruled out, vapor heat or hot water treatments are the only alternatives for quarantine treatments of mangoes. Physical treatments such as heat treatments have been implicated in higher incidence of physiological disorders and enhancement of ripening processes. Therefore, the objective of the present work was to determine the effects of hot water treatments on ethylene production and on the in vitro activity of ACC oxidase. Cv. Keitt mangoes were immersed for 3 min in hot water at 53 °C or 90 min in water at 46 °C. Immediately after the treatments, some of the mangoes were analyzed for ACC oxidase activity and others were stored to be analyzed after 4 days at 12 °C. There was a significant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ethylene; Ethylene dibromide; Heat treatment; Mangifera indica L..
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000300003
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Hydrothermal treatment minimizes the effects of refrigeration in okra fruits Horticultura Brasileira
Ribeiro,Fernanda Cristina S; Silva,Tania P; Neves,Ludmila LM; Finger,Fernando Luiz.
ABSTRACT This study evaluated the involvement of peroxidase and polyphenoloxidase on the enzymatic browning of okra and the role of catalase in the appearance of chilling injury in cultivars Amarelinho and Mammoth Spineless treated with hot water. Okra fruits from two cultivars were immersed in water at 40°C, during 15 and 30 minutes. The control treatment was not immersed, and all fruits were stored at 5°C. Visual analysis of fruits was carried out and total chlorophyll content and total phenolic compounds were determined. The activity of the enzymes catalase, peroxidase and polyphenoloxidase was analyzed. In all treatments, the cultivar Mammoth Spineless showed higher values of chlorophyll content and soluble phenolic compounds compared to cultivar...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Abelmoschus esculentus; Catalase; Peroxidase; Polyphenoloxidase; Heat treatment.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362017000400499
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Improving the storage of minimally processed mangoes (Mangifera indica L.) by hot water treatments. Repositório Alice
DJIOUA, T.; CHARLES, F.; LOPEZ-LAURI, F.; FILGUEIRAS, H. A. C.; COUDRET, A.; FREIRE JÚNIOR, M.; DUCAMP-COLLIN, M.-N.; SALLANON, H..
2009
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Heat treatment; Fresh-cut mangoes; Quality; Antioxidants; Respiration rate.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/575853
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Indíces térmicos ambientais de aviário Dark House. Repositório Alice
ABREU, P. G. de; COLDEBELLA, A.; SANTOS FILHO, J. I. dos; FEDDERN, V..
2014
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Aviário; Controle térmico; Aviaries; Heat treatment.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1013903
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Intake, digestibility and ruminal parameters of dairy cows fed pelleted diets and treated with lignosulfonate-containing sunflower seeds R. Bras. Zootec.
Marchi,Francilaine Eloise De; Figueiroa,Fábio José Ferreira; Santos,Geraldo Tadeu dos; Santos,Wallacy Barbacena Rosa dos; Kazama,Daniele Cristina da Silva; Branco,Antonio Ferriani; Leite,Laudí Cunha; Damasceno,Julio Cesar.
The objective of this study was to evaluate intake, in vitro and apparent digestibility and ruminal parameters of Holstein cows that were confined and fed corn silage and concentrate containing: ground sunflower seeds (GS); ground sunflower seeds treated with 5% lignosulfonate (GSL); pelleted sunflower seeds (PS); or ground and pelleted sunflower seeds treated with lignosulfonate (PSL). Four lactating cows with 130±28 days of lactation and body weights of 569±63 kg were used. These animals were distributed in a Latin square design with four diets and four periods of 21 days each. There were no differences in the intakes (% body weight) of dry matter (DM), organic matter (OM), mineral matter (MM), crude protein (CP), neutral detergent fiber (NDF) or acid...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chemical treatment; Fat; Heat treatment; Pellet.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000900008
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Microbiological, chemical, physical, and proteolytic activities of raw milk after thermal processing Arq. Bras. Med. Vet. Zootec.
Milaneze,H.S.; Silva,L.S.; Kottwitz,L.B.M.; Zambom,M.A.; Fonseca,L.M.; Guimarães,A.T.B.; Pozza,M.S.S..
ABSTRACT The aim was to evaluate the microbiological, chemical- physical, and shelf-life quality of milk samples after pasteurization (HTST) for 10 days or ultra-high temperature (UHT) treatment for 120 days. Raw milk counts of mesophilic aerobic microorganisms, Staphylococcus spp. and thermotolerant coliforms before HTST and UHT processing were 6.73 and 7.77; 2.84 and 4.30, and 4.68 and 4.37log10, respectively. Pseudomonas spp. were found in raw milk samples. No presence of any other microorganisms studied was detected and no microbial inhibitor was found. Processed samples met microbiological legal requirements. However, aerobic mesophilic counts for HTST pasteurized milk samples stored for 5 and 10 days increased to values comparable to those in raw...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Contamination; Caseinomacropeptide; Heat treatment.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000501625
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Óleos essenciais e tratamento térmico no controle pós-colheita de bolor verde em laranja. Repositório Alice
BENATO, E. A.; BELLETTI, T. C.; TERAO, D.; FRANCO, D. A. S..
Resumo: O bolor verde é a principal doença de frutos cítricos pós-colheita. Produtos e processos alternativos para controle de doenças de plantas vêm sendo cada vez mais requeridos. O objetivo deste trabalho foi avaliar a atividade antifúngica de óleos essenciais sobre Penicillium digitatum em laranjas, isoladamente ou em combinação com tratamento térmico. Para tanto, um isolado do fungo foi submetido, in vitro, a diferentes concentrações dos óleos de canela, capim-limão e palmarosa, em meio de cultura BDA, sendo avaliada também a atividade antifúngica dos compostos voláteis dos óleos. Além disso, foi realizado um estudo do efeito dos óleos sobre laranjas inoculadas, de modo curativo e protetivo. Laranjas foram inoculadas com 10 uL de suspensão de conídios...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Penicillium digitatum; Cinnamomun zeylanicum; Laranja; Mofo Verde; Pós-Colheita; Doença de Planta; Tratamento Térmico; Controle Biológico; Óleo Essencial; Canela; Capim Limão; Palma Rosa; Oranges; Postharvest diseases; Biological control; Cymbopogon citratus; Cymbopogon martinii; Essential oils; Heat treatment.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1093539
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Rumen fermentation and nutrient flow to the omasum in Holstein cows fed extruded canola seeds treated with or without lignosulfonate R. Bras. Zootec.
Santos,Wallacy Barbacena Rosa dos; Santos,Geraldo Tadeu dos; Neves,Carolina Antunes; De Marchi,Francilaine Eloise; Silva-Kazama,Daniele Cristina da; Ítavo,Luís Carlos Vinhas; Damasceno,Julio Cesar; Petit,Hélène Veronique.
Four multiparous Holstein cows averaging 548 kg of body weight and 74 d in lactation were used in a Latin square design with four 21-d experimental periods to determine effects of feeding extruded versus non-extruded canola seed, with or without 50 g/kg lignosulfonate on rumen fermentation, nutrient flow to the omasum, and degradability of dry matter (DM) and N of each diet. The DM effective degradability increased with extrusion and lignosulfonate treatment had no effect. The effective degradability of N was similar between diets. Lignosulfonate treatment of extruded versus non-extruded canola seeds decreased ruminal and total tract apparent digestibility of organic matter. The lowest apparent ruminal and highest intestinal digestibilities of protein,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chemical treatment; Digestion; Heat treatment; Oilseed.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700026
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Shoot tip culture and thermotherapy for recovering virus-free plants of garlic Horticultura Brasileira
Torres,Antonio Carlos; Fajardo,Thor Vinícius; Dusi,André Nepomuceno; Resende,Renato de Oliveira; Buso,José Amauri.
Garlic shoot tip culture associated with dry heat thermotherapy (cloves exposed to 37°C for 35 days) were essential for recovering virus free plants of the cv Amarante. In this condition 70% of the explants developed in vitro and produced plants. A total of 77% of those plants was virus free when indexed by ISEM, which resulted in a final index of 54% of virus free plants from treated cloves. The percentage of regeneration decreased to 20% as the temperature increased up to 40°C. However 90% of those plants were virus free, leading to a final index of 18% virus free plants out of treated cloves.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allium sativum L.; Regeneration; Heat treatment.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362000000300010
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Shoot tip culture and thermotherapy of recovering virus-free plants of garlic. Repositório Alice
TORRES, A.C.; FAJARDO, T. V. M.; DUSI, A. N.; RESENDE, R. de O.; BUSO, J. A..
2000
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Alho; Termoturgia; Cultura de apice; Livre de virus; Regeneracao; Tratamento termico; Cultivar Amarante; Semente; Allium sativum; Garlic; Termotherapy; Tip culture; Virus free; Regeneration; Heat treatment; Varieties; Seeds.
Ano: 2000 URL: http://www.alice.cnptia.embrapa.br/handle/doc/769199
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Simultaneous effects of pH and substrate concentration on hydrogen production by acidogenic fermentation Electron. J. Biotechnol.
Cubillos,Genoveva; Arrué,Ramon; Jeison,David; Chamy,Rolando; Tapia,Estela; Rodríguez,Jorge; Ruiz-Filippi,Gonzalo.
The present research examined the effects of initial substrate concentration and pH on the yield and productivity of hydrogen production by acidogenic fermentation. Assays were carried out at three different initial pH levels (5.5, 6.5 and 7.5) and three initial substrate concentrations (3, 5 and 10 g COD/L). Glucose was used as carbon source and the experiments were conducted at 37°C in batch tests, after a thermal pretreatment to eliminate methanogenic microorganisms. Conversions of glucose into hydrogen were between 16.75 and 27.25% of theoretical maximum, and high values of hydrogen productivity were obtained. An optimum value for the yield of glucose between initial pH of 6.3 and 3.7 g COD/L and productivity of the 5.95 H2/gVSS h and initial pH of 6.7...
Tipo: Journal article Palavras-chave: Acidogenic; Gompertz modified; Heat treatment; Hydrogen; Surface response.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000100011
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Stability and microbiological quality of rice bran subjected to different heat treatments. Repositório Alice
OLIVEIRA, M. G. de C.; BASSINELLO, P. Z.; LOBO, V. L. da S.; RINALDI, M. M..
2012
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Farelo de arroz; Rancidez; Contaminação alimentar; Atividade lipásica; Tratamento térmico; Rice bran; Rancidity; Food contamination; Lipase activity; Heat treatment.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/959062
Registros recuperados: 21
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