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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

CaracterÃsticas da carcaÃa e da carne de cordeiros Santa InÃs alimentados com farelo de mamona destoxificado / Characteristics of carcass and meat of Santa Ines lambs fed with detoxified castor meal

MÃnica Synthia Cirino Pereira 01 March 2011 (has links)
CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / Objetivou-se determinar as caracterÃsticas de carcaÃas e da carne de cordeiros Santa InÃs em confinamento, submetidos a quatro tratamentos experimentais com uso crescente de farelo de mamona destoxificado (0%, 33%, 66% e 100%) com base na matÃria seca. O volumoso utilizado foi silagem mista de capim elefante, sorgo e cana-de-aÃÃcar. Foram utilizados 32 cordeiros machos nÃo castrados, abatidos com peso corporal mÃdio de 30 Kg. Os ensaios experimentais foram realizados num delineamento inteiramente casualizado com quatro tratamentos e oito repetiÃÃes (ovinos). Os dados foram submetidos ANOVA e as mÃdias comparadas pelo teste de Tukey a 5%. Os animais foram submetidos a jejum hÃdrico e alimentar de 24 horas, a sangria foi feita com secÃÃo da artÃria carÃtida e veia jugular, seguida da evisceraÃÃo. ApÃs o abate as carcaÃas foram resfriadas por 24 horas a 4 C e realizadas as leituras de pH no mÃsculo semimembranosus aos 45 minutos e 24 horas pÃs abate, e determinados o peso, rendimento da carcaÃa quente e fria e efetuado as mediÃÃes morfomÃtricas. A carcaÃa foi seccionada longitudinalmente em meias carcaÃas, sendo obtidos os cortes comerciais de perna, lombo, costilhar, serrote, pescoÃo e paleta na meia carcaÃa direita, seguidos de pesagem e congelamento da paleta e da perna para posterior avaliaÃÃo da composiÃÃo tecidual. Utilizou-se o mÃsculo longissimus dorsi para as avaliaÃÃes qualitativas da carne, perda de peso por cocÃÃo, forÃa de cisalhamento, teor de lipÃdios, perfil de Ãcidos graxos, teor de proteÃnas, cinzas e umidade alÃm da anÃlise sensorial. A dieta com 100% de farelo de mamona apresentou menor valor em rendimento de carcaÃa fria, perÃmetro de perna e profundidade de tÃrax. NÃo foi observada diferenÃa estatÃstica entre os tratamentos testados, para o peso e rendimento dos cortes, no entanto a dieta influenciou o rendimento do costilhar que apresentou menor valor para o tratamento com 66% de substituiÃÃo de farelo de mamona. A estimativa de musculosidade da carcaÃa sofreu efeito da dieta, na relaÃÃo mÃsculo:osso da perna, verificou-se menor mÃdia para aqueles alimentados com 100% de farelo de mamona. Houve diferenÃa entre os tecidos constituintes da perna, tecido muscular, Ãsseo e outros tecidos, na paleta diferiram os tecidos Ãsseos e outros tecidos. A Ãrea de olho de lombo foi similar entre os tratamentos. Verificou-se efeito significativo (p<0,05) entre os tratamentos para a composiÃÃo centesimal, com menor percentual de gordura, proteÃna e umidade nos nÃveis de substituiÃÃo 66, 100 e 33%, respectivamente. A substituiÃÃo do farelo de mamona proporcionou um perfil de Ãcidos graxos interessantes à saÃde do consumidor, apresentando os melhores Ãndices para as relaÃÃes avaliadas entre os Ãcidos graxos. NÃo foi observada diferenÃa estatÃstica entre os tratamentos para os parÃmetros pH e forÃa de cisalhamento no entanto verificou-se efeito dos nÃveis de substituiÃÃo na perda de peso por cocÃÃo apresentando menor percentual 24,42% (p<0,05) em 33% de substituiÃÃo. Avaliaram-se as caracterÃsticas sensoriais considerando os atributos dureza, suculÃncia, sabor, cor, aroma e aceitaÃÃo global. Foi evidenciado que a dieta com 33% de substituiÃÃo proporciona uma carne com maior dureza, sem, contudo, comprometer a sua aceitaÃÃo. NÃo se observou variaÃÃo dos demais atributos sensoriais da carne. Pode-se concluir que a utilizaÃÃo de dietas contendo farelo de mamona destoxificado em substituiÃÃo parcial ao farelo de soja nÃo interfere nas caracterÃsticas de carcaÃa de ovinos Santa InÃs, bem como nos pesos e rendimentos dos cortes comerciais e composiÃÃo tecidual, mantendo a qualidade fÃsico-quÃmica e sensorial. / The objective of this study was to determine the characteristics of carcass and meat of Santa InÃs lambs submitted to four experimental treatments with increasing concentrations of detoxified castor meal (0%, 33%, 66% and 100%) with dry matter basis. The bulk used consisted of mixed silage of elephant grass, sorghum and sugar cane. Thirty-two non-castrated male lambs were used and slaughtered with average body weight of 30 kg. Experimental tests were conducted in a completely randomized design with four treatments and eight replications (lambs). Data were submitted ANOVA and means compared by Tukey test at 5%. The animals were fasted of food and water for 24 hours and bleeding was performed with section of carotid artery and jugular vein, followed by evisceration. After slaughter, the carcasses were chilled for 24 hours at 4ÂC and pH was measured on the semimembranosus muscle at 45 minutes and 24 hours after slaughter, also determining weight, hot and cold carcass yield and morphometric measurements. The carcass was longitudinally sectioned into half carcasses, and retail cuts such as leg, loin, rib, rear, neck and shoulder on the right half carcass were obtained, followed by weighing and freezing of shoulder and leg for further evaluation of tissue composition. The longissimus dorsi muscle was used for the qualitative assessments of meat, weight loss due to cooking, shear force, fat content, fatty acid profile, protein content, ash, moisture and sensory analysis. Diet with 100% of castor meal showed the lowest cold carcass yield, leg circumference and chest depth. No statistical difference between treatments was observed for weight and cut yields; however, the diet influenced the rib yield, which showed the lowest value for treatment with 66% of castor meal. Carcass muscularity was affected by the diet, and in the muscle: bone ratio of the leg, a lower average for those fed with 100% of castor meal was observed. There were differences between tissue constituents of leg, muscle, bone and other tissues, and in the palette, bone and other tissues differed. The rib eye area was similar between treatments. There was a significant effect (p <0.05) between treatments for the centesimal composition, with lower percentage of fat, protein and moisture at substitution levels of 66, 100 and 33% respectively. The substitution of castor meal provided an interesting fatty acids profile for consumer health, featuring the best ratios for the evaluated relations between fatty acids. There was no statistical difference between treatments for parameters pH and shear force; however, there was an effect of the substitution in weight loss due to cooking, showing lower percentage 24.42% (p <0.05) in 33% of substitution. The sensory characteristics were evaluated considering attributes such as hardness, juiciness, flavor, color, aroma and overall acceptability. It was shown that diet with 33% of substitution provided meat with higher hardness but without compromising its acceptance. There was no change in the other meat sensory attributes. It could be concluded that the use of diets containing detoxified castor meal as partial substitution for soybean meal does not affect the carcass characteristics of Santa InÃs lambs, weight and yield of retail cuts and tissue composition, maintaining its physicochemical and sensory quality.
2

Agro-industrial by-product use in diets of ovinos of cut: consumption, digestibilidade, performance and characteristics of carcass / UtilizaÃÃo de subprodutos agroindÃstriais em dietas de ovinos de corte: consumo, digestibilidade, desempenho e caracterÃsticas de carcaÃa

Rossana Herculano Clementino 11 February 2008 (has links)
CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / Foram realizados cinco experimentos objetivando determinar o consumo e digestibilidade, desempenho e caracterÃsticas quantitativas da carcaÃa de ovinos alimentados com dietas contendo subprodutos, com base na matÃria natural, (SPU), da banana (Musa sp.) desidratada (SPB), da manga (Mangifera indica) desidratada (SPM) e do urucum (Bixa orellana L.). No primeiro, segundo e terceiro experimentos foram avaliados os teores de matÃria seca (MS), matÃria orgÃnica (MO), proteÃna bruta (PB), fibra em detergente neutro (FDN), fibra em detergente Ãcido (FDA), hemicelulose (HCEL), lignina (LIG), nitrogÃnio insolÃvel em detergente neutro (NIDN), nitrogÃnio insolÃvel em detergente Ãcido (NIDA), carboidratos totais (CT), carboidratos nÃo fibrosos (CNF), os nutrientes digestÃveis totais (NDT) e fator de efetividade fÃsica da FDN. Ainda foram avaliados o consumo voluntÃrio, digestibilidade aparente da MS, PB, FDN, FDA, CHOT, CNF, NDT e balanÃo de nitrogÃnio (BN). No quarto e quinto experimentos foram avaliados os consumos de nutrientes em g/dia, % PV e g/kg0,75, ganho em peso e conversÃo alimentar. Como tambÃm foram avaliadas caracterÃsticas quantitativas da carcaÃa e anÃlise sensorial de dietas com adiÃÃo de 20% do SPB, com 30% do SPM e 40% do SPU. No primeiro experimento, a adiÃÃo do subproduto de banana (SPB) nÃo influenciou (P>0,05) o consumo de matÃria seca (MS) e matÃria orgÃnica (MO) quando expressos nas diferentes formas, obtendo-se valores mÃdios de 677,3 e 605,81 em g/dia, respectivamente. A adiÃÃo do SPB promoveu um aumento significativo (P<0,05) no CPB e CEE de 34,3 a 46,5 e de 10,63 a 59,9 g/dia e reduÃÃo de 3,07 unidades percentuais para o consumo de FDN. Com relaÃÃo aos coeficientes de digestibilidade da MS, PB, MO, EE, FDA e CHOT observou-se efeito negativo, excetuando, o CDFDN que nÃo foi influenciado (P>0,05) com adiÃÃo do SPB em substituiÃÃo ao feno. No segundo experimento, os consumos em g/dia de MS, MO, PB, EE, FDN e FDA apresentaram resposta quadrÃtica estimando-se consumos mÃximos de matÃria seca e matÃria orgÃnica de 36,11 e 37,8%, respectivamente, com a adiÃÃo do SPM. Contudo, nÃo houve diferenÃa (P>0,05) para a digestibilidade aparente dos nutrientes. Entretanto, a digestibilidade aparente da proteÃna bruta (CDPB) e o balanÃo de nitrogÃnio apresentaram comportamento quadrÃtico. No terceiro experimento, houve aumento nos consumos e dos nutrientes com adiÃÃo do subproduto do urucum (SPU), excetuando-se o consumo de EE que nÃo houve efeito (P>0,05). O comportamento linear positivo foi verificado para os coeficientes de digestibilidade (CD) da MS, MO e PB, jà para os CDEE, CDFDN, CDFDA e CDCHOT nÃo houve efeito (P>0,05) significativo. A adiÃÃo do SPU promoveu um balanÃo de N positivo. No quarto experimento, nÃo foram observadas diferenÃas significativas (P>0,05) entre os tratamentos para os consumos de matÃria seca em g/animal/dia. PorÃm, observou-se aumento para os consumos em %PV e g/kg0,75, para a dieta com adiÃÃo do SPU. Em relaÃÃo aos consumos de PB o SPB e SPM, apresentaram superioridade em relaÃÃo aos ovinos que receberam a dieta SPU. Para os CFDN nÃo foram observadas diferenÃas (P>0,05) entre as dietas nas diversas formas que foram expressas. O mesmo comportamento foi verificado com relaÃÃo ao ganho em peso, pesos de carcaÃa quente e fria e os respectivos rendimentos de carcaÃa quente e fria. Observaram-se valores mÃdios de RCQ e RCF respectivos de 46,05; 46,38; 46,54; 48,39% e 42,27; 45,67; 45,79; 47,72% para as dietas padrÃo (DP), SPB, SPM e SPU. Com relaÃÃo aos cortes comercias, houve efeito significativo (P<0,05) apenas para o lombo anterior em kg e para a paleta em % do PCF. Para a Ãrea de olho de lombo foram registrados valores respectivos de 8,28; 9,61; 1,38 e 10,82 para as dietas DP; SPB; SPM e SPU. No quinto experimento, relativo à dissecaÃÃo da perna dos ovinos, nÃo foi verificado efeito significativo (P>0,05) para a relaÃÃo M/O; M/G e para o Ãndice de musculosidade da perna (IM). Obtiveram-se valores para o IM de 0,79; 0,73; 0,81 e 0,82, respectivamente, para a DP; SPB; SPM e SPU. No sexto experimento, os atributos sensoriais da carne de ovinos apresentaram superioridade para o grau de dureza da carne dos ovinos alimentados com SPM e SPU. Menores suculÃncia e sabor ovino foram verificados, respectivamente, nas dietas SPM e SPB / Five experiments was conducted with the objective of evaluating the consume and digestibility, performance and quantitative characteristics of the lambs carcass fed with diets containing by - products, with base in the natural matter of the banana ( Musa sp .), ( BBP) , of the mango ( Mangifera ind ica ) ( MBP) , of the annato ( Bixa orellana ) ( ABP) . i n the first, second and third experiments were determination of dry matter ( DM), organic matter (OM), crude protein (CP), neutral detergent fiber ( NDF ), acid detergent fiber (ADF), hemicellulose (HCEL), lig nin (LIG), neutral detergent insoluble nitrogen (NIDN), acid detergent insoluble nitrogen (ADIN) , total carbohydrates (TC) , non - fibrous carbohydrates (NFC), total digestible nutrients (TDN) , and factor of physical effectiveness of FND. They were still eval uated the voluntary intake and coefficients of digestibility of DM, CP, NDF, ADF, CHOT, TDN, and nitrogen balance (NB). In the fourth and fifth experiments were evaluated the nutrients intake in g/day , % BW and g/kg 0,75 daily gain and alimentary conversion . As well as they were evaluated quantitative characteristic of the carcass and sensorial analysis of diets with addition 20% of BBP with 30% of MBP and 40% of ABP . In the first experiment the addition of the banana's by - product (BBP) it didn't influence ( P>0.05) the dry matter intake (DMI), and organic matter (OMI ) intake when expressed in the different forms with values of 677.3 and 605. 81 in g/day , respectively observed . The (BBP) addition increased (P <0. 05) in crude protein intake (CPI) and ether extrac t (EEI) intak e from 34.3 to 46.5 and from 10. 63 to 59 . 9 g/day and reduction of 3 . 07 percentage units for the NDF intake. Regarding the of digestibility coefficients of DM, CP DO, EE, ADF and TC was observed negative effect (P<0. 05) , excepting, CDNDF that i t was not influenced (P>0.05) with addition of BBP . In second experiment the day of DM, DO, CP, EE, NDF, ADF intakes g/day presented quadratic answer being considered maximum dry matter and organic matter intake 36. 11 and 37. 8% , re spectively of addition of mango by - product (MBP). However there was not difference (P >0.05) for the apparent digestibility of the nutrients, except the apparent digestibility of the crude protein (DCCP) the addition of (MBP) quadratic behavior observed. In third experiment annatto by product (ABP) addition increased (P <0.05) in nutrients intake , excepted the EE intake was not effect significant (P>0. 05) the addition anatto by product (ABP ) with values in the 11.5 and 0. 05 g/day e % BW . The linear ly behavior was verified for the di gestibility coefficients (DC) of DM , DO and CP, already for CDEE, CNDF, CDANF XIX and CDCHOT didn't have effect (P>0. 05). The anatto by - product (ABP ) addition promoted a positive balance of N . In the fourth experiment significant differences were not observed (P>0.05) among the treatments for the dry matter intake in g/ day . However, increase was observed for the % PV and g/kg 0.75 intake for the diet with addition of annato by - product, banana by - product and mango by product . The intake of CP by - product of mango and banana &#769;s by - product (BBP) presented superiority in relation to the lambs that received the other diets. For the EE intake BBP it was observed higher values the other diets and NDF intake it was not observed differences (P>0.05) among the diets in the s everal forms that were expressed . The same behavior was verified regarding the weight gain , hot carcass weight (HCW) and cold carcass (CC W ) and the respective yield of hot and cold carcass. The values of hot carcass yield and cold carcass (CC) were 46.05; 46.38; 46.54; 48. 39% and 42 . 27; 45.67; 45.79; 47. 72% for the diets (PD), BBP, MBP a nd ABP respectively . In respect to the cuts trade there was effect significant (P <0 . 05) just for the anterior loin in kg and for the shoulder % WCC . For loin eye area (LEA ) were registered respective values of 8.28; 9.61; 1. 38 ; 10. 82 for the diets PD; BBP; MBP; ABP. In the fifth experiment with the dissection of the leg of the lambs significant effect was not verified (P>0 . 05) for the accounting M/O; M/G and for the index of muscularity of the leg (MI ) that obtained values of 0.79; 0.73; 0.81; 0. 82 for PD; BBP; MBP; MBP in the sixth experiment the attributes sensorial of the lambs meat presented superiority for the degree of hardness of the meat of the lambs fed with MBP and MBP. To smallest succulency and the smallest flavor lambs they were verified in the diets MBP and BBP respectively.

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