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| Registros recuperados: 17 | |
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| Salazar,Diego Reynaga; Stabile,Samuel dos Santos; Guimarães,Paula de Souza; Paterniani,Maria Elisa Ayres Guidetti Zagatto; Santos,Marcos Veiga dos; Silva,Luis Felipe Prada e. |
| O objetivo deste trabalho foi avaliar o efeito da maturidade da planta sobre a qualidade nutricional do colmo de híbridos de milho, para definir critérios de seleção em programas de melhoramento de milho para ensilagem. Foram avaliados 15 híbridos de milho, do programa de melhoramento do Instituto Agronômico, em Campinas, SP, colhidos com 90, 120 e 150 dias após a germinação, em experimento com delineamento de blocos ao acaso, com três repetições. O quarto e o quinto internódios do colmo foram retirados para determinação da composição bromatológica e digestibilidade in vitro. Com o avanço da maturidade, houve queda no teor de fibra e aumento no de lignina de ambos os internódios. Observou-se aumento na digestibilidade da matéria seca do quinto internódio,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Degradabilidade; Lignina; Melhoramento genético; Parede celular. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000700018 |
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| Andreatta,Evelise; Fernandes,Andrezza Maria; Santos,Marcos Veiga dos; Mussarelli,Camila; Marques,Marina Célia; Gigante,Mirna Lúcia; Oliveira,Carlos Augusto Fernandes de. |
| The objective of this work was to evaluate the effects of using bulk milk with different somatic cell counts (SCC) on the quality of minas frescal cheese. A randomized complete block design was used, with 3x5 factorial treatments, with three SCC levels (low, 125,000 cells mL-1; intermediate, 437,000 cells mL-1; and high, 1,053,000 cells mL-1) and five storage durations. Cheese was vacuum-packed in plastic bags and analyzed after 2, 9, 16, 23 and 30 days of storage at 4ºC. Somatic cell counts did not affect dry matter, fat, ash content, pH, free fatty acid concentrations and sensory parameters of minas frescal cheese. However, SCC in milk increased losses of protein in whey and decreased the cheese protein content. These changes did not affect the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cheese quality; Proteolysis; Somatic cell count. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000300014 |
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| Botaro,Bruno Garcia; Lima,Ygor Vinícius Real de; Aquino,Adriana Augusto; Fernandes,Raquel Helena Rocha; Garcia,José Fernando; Santos,Marcos Veiga dos. |
| O objetivo deste trabalho foi avaliar o efeito do polimorfismo genético da beta-lactoglobulina, da raça e da sazonalidade sobre as características físico-químicas e estabilidade do leite bovino. Foram selecionados 5 rebanhos da raça Holandesa e 6 da Girolando. Amostras de leite e sangue foram coletadas de 660 vacas Holandesas e 293 Girolandos, num total de 953 amostras, obtidas em duas coletas na estação seca e duas na estação chuvosa. As amostras de leite foram submetidas à análise de acidez titulável, pH, crioscopia, e ao teste de estabilidade ao etanol (70, 76, 80 e 84ºGL). As amostras de sangue foram submetidas à reação em cadeia de polimerase, para determinação do polimorfismo da beta-lactoglobulina em ambas as raças estudadas. Não houve efeito do... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vaca leiteira; Variante genética; Propriedades físico-químicas do leite; Prova de estabilidade ao etanol. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000500019 |
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| Porcionato,Marco Aurélio de Felicio; Soares,Weber Vilas Boas; Reis,Carolina Barbosa Malek dos; Cortinhas,Cristina Simões; Mestieri,Lucinéia; Santos,Marcos Veiga dos. |
| The aim of this work was to evaluate the association between milk flow, teat morphological measurements and subclinical mastitis prevalence in Gir cows. Eighty cows in the 2nd and 3rd lactations, with 90 to 200 days of lactation, were divided according to milk flow during milking into fast or slow groups. Teat morphometry was assessed by ultrasound scanning of the right anterior teat and external measurements. Milk samples were collected for somatic cells count (SCC) and microbiological culture. The effect of milk flow during milking was evaluated by analysis of variance of milk yield, SCC, morphometry and external measurements. The association of morphometry and external measurements of the teats with the SCC and microorganisms found in milk were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gir; Lactation; Mammary gland; Milking; Morphology. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010001200023 |
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| Pereira,Angélica Simone Cravo; Santos,Marcos Veiga dos; Aferri,Gabriela; Corte,Rosana Ruegger Pereira da Silva; Silva,Saulo da Luz e; Freitas Júnior,José Esler de; Leme,Paulo Roberto; Rennó,Francisco Palma. |
| The objective of this study was to evaluate the effect of lipid and selenium sources in diets for finishing Nellore steers on the fatty acid composition and selenium concentration of the longissimus muscle. Fifty Nellore steers (body weight = 458±39 kg) were assigned to one of six dietary treatments: 1) diet containing sunflower seed and inorganic selenium; 2) sunflower seed and organic selenium; 3) whole cottonseed and inorganic selenium; 4) whole cottonseed and organic selenium; 5) soybeans and inorganic selenium; and 6) soybeans and organic selenium. Diets were formulated with the same amount of nitrogen and calories and supplied once daily to steers in collective pens, with three animals per pen, for 120 d. At the end of the trial, steers were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant; Cattle; Longissimus; Soybean seed; Sunflower seed; Whole cottonseed. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001100009 |
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| Alves,Bruna Gomes; Martins,Cristian Marlon de Magalhães Rodrigues; Peti,Ana Paula Ferranti; Moraes,Luiz Alberto Beraldo de; Santos,Marcos Veiga dos. |
| ABSTRACT We evaluated the inclusion of two crude extracts produced by Streptomyces genus on in vitro dry matter and organic matter digestibility (IVDMD; IVOMD), cumulative gas production, volatile fatty acids (VFA), and methane (CH4) and ammoniacal nitrogen (NH3-N) concentration. The experimental design was randomized blocks with three blocks and four treatments: AMC (1.2 mg/25 mL ruminal inoculum), Caat (1.2 mg/25 mL ruminal inoculum), negative control (no inclusion of extracts), and positive control (sodium monensin, 1.7 mg/25 mL ruminal inoculum). Ruminal fluid samples were collected from three multiparous Holstein dairy cows fitted with ruminal cannula and incubated in a 24-h fermentation assay. There was no effect of crude extract inclusion in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Actinobacteria; Extracts; In vitro fermentation; Monensin. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100721 |
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| Rennó,Francisco Palma; Freitas Júnior,José Esler de; Gandra,Jefferson Rodrigues; Verdurico,Lenita Camargo; Santos,Marcos Veiga dos; Barletta,Rafael Villela; Venturelli,Beatriz Conte; Vilela,Flávio Garcia. |
| The objective of this study was to evaluate the utilization of different sources of unsaturated long-chain fatty acids in diets for dairy cows during the transition period and early lactation on the milk fatty acid profile and composition of the protein fraction. Thirty-six Holstein cows were divided into three groups, fed the following diets: control (C); soybean oil (SO); and calcium salts of long-chain unsaturated fatty acids (CS). The milk samples utilized for analysis were obtained weekly from parturition to twelve weeks of lactation; each one of the samples originated from two daily milkings. Milk composition and total nitrogen, non-protein nitrogen and non-casein nitrogen levels were analyzed. The cows receiving the diet with calcium salts had lower... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Calcium salts of fatty acids; Corn silage; Soybean oil. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001100008 |
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| Botaro,Bruno Garcia; Lima,Ygor Vinícius Real de; Cortinhas,Cristina Simões; Silva,Luís Felipe Prada e; Rennó,Francisco Palma; Santos,Marcos Veiga dos. |
| The objective of this study was to evaluate the effect of genetic polymorphism of kappa-casein, breed and seasonality on the physicochemical characteristics, composition and stability of milk in commercial dairy herds. A total of 879 milk and blood samples were collected from 603 Holstein and 276 Girolando cows, obtained during rainy and dry seasons. Milk samples were analyzed to determine the physicochemical characteristics, composition and ethanol stability, while blood samples were subjected to polymerase chain reaction to identify the kappa-casein genotype. The frequencies of genotypes AA, AB and BB of k-casein were respectively, 66.83, 31.84 and 1.33% for Holstein, and 71.38, 27.90 and 0.72% for the Girolando cows, respectively. The A allele was more... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crioscopy; Dairy cow; Ethanol stability test; Genetic variant; Polymerase chain reaction; Titratable acidity. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009001200022 |
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| Cortinhas,Cristina Simões; Freitas Júnior,José Esler de; Naves,Julianne de Rezende; Porcionato,Marco Aurélio de Felicio; Silva,Luís Felipe Prada e; Rennó,Francisco Palma; Santos,Marcos Veiga dos. |
| The present study was carried out with the objective of evaluating the effects of feeding dairy cows with organic or inorganic sources of zinc (Zn), copper (Cu) and selenium (Se) on blood concentrations of these minerals, blood metabolic profiles, nutrient intake and milk yield and composition. Nineteen Holstein cows were selected and randomly assigned to two groups for receiving organic (n = 9) or inorganic (n = 10) sources of Zn, Cu and Se from 60 days before the expected date of calving to 80 days of lactation. Samples of feed, orts and milk were collected for analysis. Body condition score (BCS) was determined and blood samples were collected for analysis of Zn, Cu and Se concentrations, as well as for metabolic profile. Supplying organic or inorganic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chelate; Microminerals; Nutrition; Organic sources. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600023 |
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| Freitas Júnior,José Esler de; Rennó,Francisco Palma; Santos,Marcos Veiga dos; Gandra,Jefferson Rodrigues; Maturana Filho,Milton; Venturelli,Beatriz Conte. |
| The objective of this study was to evaluate the use of fat sources in rations for lactating cows on the productive performance and composition of milk protein fraction. Twelve Holstein cows were used, grouped in three balanced 4 × 4 Latin squares, fed with the following rations: control; refined soybean oil; whole raw soybean; and calcium salts of unsaturated fatty acid (Megalac-E). Dry matter and nutrient intake, and daily milk production were evaluated. The samples used to analyze milk composition were collected in two alternate days and were obtained from two daily milking. Milk composition and total nitrogen, non-protein nitrogen and non-casein nitrogen ratios were analyzed. The casein, serum protein and true protein ratios were obtained by difference.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fat supplementation; Intake; Milk production and composition; Non-protein nitrogen; True protein. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000400021 |
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| Aquino,Adriana Augusto; Botaro,Bruno Garcia; Ikeda,Flávio dos Santos; Rodrigues,Paulo Henrique Mazza; Martins,Maria de Fátima; Santos,Marcos Veiga dos. |
| Avaliou-se o efeito de níveis crescentes de uréia na dieta de vacas em lactação sobre a produção e composição físico-química do leite. Foram utilizadas nove vacas holandesas em lactação, distribuídas em três quadrados latinos 3 x 3, com três tratamentos e três períodos de coleta. O experimento teve duração de 63 dias, divididos em três períodos de 21 dias. Os tratamentos consistiram de uma dieta controle, formulada para suprir 100% das exigências de PB, proteína degradável no rúmen (PDR) e proteína não-degradável no rúmen (PNDR), composta de farelo de soja como principal fonte protéica e cana-de-açúcar como volumoso, e de duas outras dietas, semelhantes à dieta controle, mas com 0,75 ou 1,5% de uréia em substituição ao farelo de soja. As dietas foram... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cana-de-açúcar; Consumo de matéria seca; Produção e composição do leite; Nitrogênio não-protéico; Uréia. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982007000400018 |
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| Gandra,Jefferson Rodrigues; Rennó,Francisco Palma; Freitas Júnior,José Esler de; Santos,Marcos Veiga dos; Silva,Luís Felipe Prada e; Araújo,Ana Paula Chaves de. |
| The objective of this work was to evaluate the levels of sodium monensin on lactating cows and their effects on productive performance and milk protein fraction composition. It was used 12 Holstein cows, distributed in four balanced 3 × 3 Latin squares, and fed three diets: one control without monensin, and two diets with monensin at the levels of 24 or 48 mg/kg DM added to the concentrate. Milk production was daily measured throughout the entire experimental period. The samples used for analysis of milk composition were collected on two alternated days from the two daily milking. Non-protein nitrogen, total nitrogen and non-casein nitrogen contents were directly evaluated in the milk, and casein, whey protein and true protein contents were indirectly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Casein; Dairy cows; Ionophores; Milk yield and composition; Productive efficiency. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000800025 |
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| Meneghini,Rafael Cedric Möller; Cassoli,Laerte Dagher; Martines Filho,João Gomes; Xavier,Carlos Eduardo Osório; Santos,Marcos Veiga dos; Caixeta Filho,José Vicente; Natel,Andressa Santanna; Machado,Paulo Fernando. |
| ABSTRACT The current pricing process of raw milk in Brazil discourages producers from improving milk composition, which affects both yield and quality of dairy products. Furthermore, small and medium-sized dairies face great difficulties when it comes to planning production. Thus, a linear programming model was developed to price the raw milk and determine the optimal mix (combination of quantities) of dairy products that maximizes total contribution margin (TCM) under daily scenarios of high (January) and low (July) raw milk supplies (summer and winter, respectively) by comparing optimal solutions with actual results. The TCM of optimal and actual mixes were higher in January due to the greater availability of raw material. Packaging was a limiting factor... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Contribution margin; Dairy products; Linear programming; Milk components; Milk pricing. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000100051 |
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| Botaro,Bruno Garcia; Gameiro,Augusto Hauber; Santos,Marcos Veiga dos. |
| Programs designed to enhance milk quality have been used to motivate dairy farmers to improve the quality of the raw milk they produce. The objective of this study was to evaluate the association between a milk quality payment program and four indicative variables of milk quality, by testing bulk tank somatic cell count (SCC), bulk tank total bacterial count (TBC), fat (FAT) and protein (PROT) percentages over three years in four dairy cooperatives in Southern Brazil. We used a multiple regression econometric model estimated from market data of milk delivered by farmers to the cooperatives. Bulk tank milk samples (n = 19,644) were monthly collected. The data set was analyzed for the effects of seasonality, average daily volume of milk, the award/penalty,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacterial count; Somatic cell count; Premium payment; Milk composition; Milk production. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000100004 |
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| Botaro,Bruno Garcia; Cortinhas,Cristina Simões; Mestieri,Lucinéia; Machado,Paulo Fernando; Santos,Marcos Veiga dos. |
| The aim of this study was to estimate the concentration of milk true protein (TP) by mid-infrared absorbance method (MIR) in samples from bulk tank of dairy herds, and to determine the correlation between the results of TP of milk determined by Kjeldahl and MIR. Forty nine dairy herds were selected (17 Holstein, 6 Jersey and 26 Girolando) for monthly collections of samples from bulk tanks during the period of one year (284 samples). Fat, lactose, crude protein and total solids were firstly determined by MIR, and then analyzed for total and true protein by Kjeldahl method. The regression equation to estimate TP contents based on MIR crude protein determination was as follows: TP=0.0021+(1.0104xCP), where: TP is the content of true protein, CP is the crude... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy cow; Milk composition; Protein determination. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000800028 |
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| Fonseca,Luís Fernando Laranja da; Rodrigues,Paulo Henrique Mazza; Santos,Marcos Veiga dos; Lima,André Pinto; Lucci,Carlos de Sousa. |
| The objective of this study was to analyse the effects of propylene glycol (PPG) supplementation to periparturient cows on: milk yield, changes in body condition score (BCS), days to first oestrus after calving, and on the beta-hydroxybutyrate (BHBA), non-esterefied fatty acids (NEFA) and glucose concentrations. Twenty-three Holstein cows were distributed into two treatments: a) 300 mL of PPG (group treatment, 11 cows), b) 300 mL of water (group control, 12 cows), administered via drench in periparturient period. BCS was evaluated on days -10, 0, 15, 30, 45 and 60 relative to calving date. There was no effect of treatment or time on milk yield, although the interaction of time*treatment was significant and during the 4th and 5th week of lactation, milk... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy cow; Propylene glycol; Milk yield; Body condition score; Reproductive performance. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000300037 |
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| Santos,Marcos Veiga dos; Oliveira,Carlos Augusto Fernandes; Lima,Ygor Vinícius Real de; Botaro,Bruno Garcia. |
| O objetivo do presente estudo foi avaliar os efeitos da retirada mecânica das células somáticas do leite cru sobre a composição e a proteólise durante o armazenamento refrigerado do leite pasteurizado. O delineamento experimental utilizado foi o de blocos generalizados ao acaso, no qual foram considerados como blocos as repetições (n=3) e o nível de gordura do leite (desnatado e integral). Utilizou-se um arranjo fatorial de tratamento do tipo 2 x 2, constituído por: dois níveis de contagem de células somáticas - CCS (baixa e alta CCS) e pela aplicação ou não da microfiltração ao leite. Foram realizadas, ainda, medidas repetidas no tempo, as quais corresponderam aos dias de coleta do leite pasteurizado durante o período de armazenamento (1, 7, 14 e 21... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Células somáticas; Leite; Atividade enzimática; Proteólise; Lipólise; Microfiltração. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782006000500022 |
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| Registros recuperados: 17 | |
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