RESUMO -Objetivou-se com este trabalho avaliar o efeito da simulação da prenhez (introdução de 100 esferas de chumbo no útero -CHU) e da ovariectomia (retirada dos ovários -OVA) sobre as características físico-químicas da carcaça e da carne de novilhas. Foram utilizadas 19 novilhas mestiças (½ Nelore x ½ Red Angus), com 18 meses de idade e peso médio inicial de 257,8 kg, terminadas em confinamento recebendo uma dieta à base de silagem de milho (41%) e farelo de soja e milho (59%).O peso vivo ao abate, sem diferença entre tratamentos, foi de 324,1; 323,3 e 303,0 kg para as novilhas dos tratamentos VAZ, CHU e OVA, respectivamente. Da mesma forma, não houve diferença entre tratamentos para peso de carcaça quente (171,1 kg), comprimento de carcaça (113,8 cm), comprimento de perna (68,2 cm), espessura do coxão (21,0 cm), área de olho-de-lombo (57,3 cm 2 ), espessura de gordura de cobertura (4,0 mm), proporções de músculo (62,6%), osso (16,0%) e gordura (21,7%), relação músculo/osso (3,9), relação músculo + gordura (porção comestível)/osso (5,3), perdas por cocção (24,3%), perdas do congelamento à cocção (30,9%), maciez (7,1 pontos), suculência (6,6 pontos) e palatabilidade (6,6 pontos). Os parâmetros cor, textura e marmoreio também não diferiram entre os tratamentos, apresentando, respectivamente, 4,0; 4,4 e 3,7 pontos. Não houve diferença significativa para os teores de cinzas (1,1%) e PB (21,8%) e para as concentrações de extrato etéreo total (2,9%) e colesterol (49,6 mg/100g) do músculo Longissimus dorsi. Portanto, a ocorrência do estro não alterou as características analisadas.Palavras-chave: carcaça, composição física, proteína bruta, suculência, umidade Carcass and meat traits of feedlot finished heifers submitted to surgical or mechanical anoestrousABSTRACT -This study was conducted to evaluate the effect of pregnancy simulation (placement of 100 lead spheres in the uterus-LEAD) and ovariectomy (OVAE) on traits of carcass and meat of heifers finished in feedlot. Animals not pregnant and with intact ovary were used as the control (CTRL). Nineteen crossbred heifers (½ Nelore x ½ Red Angus) averaging 18 months of age and 257.8 kg of body weight were used. Animals were fed a diet containing (% DM): 41% of corn silage and 59% of soybean meal, corn, and trace minerals. No significant differences were observed for slaughter weight, which averaged 324.1, 323.3, and 303.3 kg, respectively, for CTRL, LEAD, and OVAE treatments. Similarly, there were no significant differences among treatments for the following variables: hot carcass weight (171.1 kg), carcass length (113.8 cm), hind limb length (68.2 cm), cushion thickness (21.0 cm), loin eye area (57.3 cm 2 ), fat thickness (4.0 mm), percentages of muscle (62.6%), bone (16.0%), and fat (21.7%), muscle/fat ratio (3.9), muscle plus fat/bone ratio (5.3), cooking losses (24.3%), freezing to cooking losses (30.9%), tenderness (7.1 points), juiciness (6.6 points), and flavor (6.6 points).The color, texture, and marbling parameters also did not differ averaging 4.0, 4.4, and 3...
The study was conducted to evaluate the chemical composition and fatty acid profi le of the Longissimus dorsi muscle of fi rst (PUR1) and second (PUR2) generations of Purunã-breed cattle, and compare them to their ancestral generations (PUR). Thirty-nine young bulls with an average initial weight of 236 kg and initial age of 10 months were used. The animals were slaughtered at the age of 16 months with an average fi nal weight of 464 kg. The content of water, ash, crude protein and total cholesterol in the muscles were similar (P>0.05) among the different genetic groups. The levels of total intramuscular fat were higher (P<0.05) for PUR in comparison to PUR1 and PUR 2. The percentage shares of 14:0, 14:1 n-7 and 16:0 fatty acids were higher (P<0.05) as a percentage of total fatty acids in PUR2 and PUR in comparison to PUR1. Thus, the 22:6 n-6 ratios were greatest (P<0.05) for the PUR1 genetic group. The lowest (P<0.05) percentage was observed in PUR. There were no difference (P>0.05) in SFA, MUFA, PUFA, n-3, or in the PUFA:SFA and n-6:n-3 ratios, when comparing the fi rst and second Purunã generations to their ancestors.
This experiment was carried out to study soybean oil and linseed as feeding alternatives to improve the animal performance and the carcass characteristics of crossbred bulls finished in feedlot for 105 days. There were used 21 bulls with 18 months old randomized in three treatments (n=7): control (CON) which offered concentrate based on corn; soybean oil + linseed grains (LS1); soybean oil + linseed grains (LS2) that had an experimental time divided in two periods: 60 days with soybean oil and the remaining 45 days with soybean oil + linseed grains. No differences (P>0.05) were observed among treatments on the initial body weight (343 kg), final body weight (501 kg), average daily gain (1.50 kg), hot carcass weight (262 kg), carcass dressing (52.4%), fat thickness (5.40 mm), Longissimus area (88.0 cm 2 ), Longissimus area/100 kg (33.7 cm 2 ) dry matter conversion (8.00 kg DM/1 kg of body weight), dry matter intake (11.8 kg), dry matter intake/live body weight (2.80%), crude protein intake (1.20 kg), gross energy intake (52.9 Mcal/day), acid detergent fiber intake (2.30 kg), acid detergent fiber intake/100 kg of live body weight (0.50%), neutral detergent fiber intake (2.38 kg) and neutral detergent fiber intake/100 kg of live body weight (0.90%). Therefore, soybean oil and linseed can be used to replace corn in beef cattle diets without reducing the animal performance and the carcass characteristics.
ResumoO objetivo do presente estudo foi comparar a composição química e perfil de ácidos graxos entre acém, alcatra, contrafilé, coxão mole e patinho de novilhas cruzadas (½ Nelore vs ½ Charolês) terminadas em confinamento. O patinho, coxão mole e contrafilé apresentaram maior percentagem (P<0,05) de umidade (75, 19; 73,87 e 74,36%) e cinzas (1, 09; 1,08 e 1,13%) em relação ao acém (71,18 e 0,93%) e alcatra (71,58 e 1,07%), respectivamente. Por outro lado, as percentagens de lipídios totais do acém (7,40%) e alcatra (5,19%) foram superiores (P<0,05) aos observados no contrafilé (2,42%), coxão mole (1,76%) e patinho (1,69%). O colesterol total do acém (57,63 mg/100 g de músculo) foi superior (P<0,05) ao observado no contrafilé (49,71 mg/100 g de músculo) e coxão mole (46,55 mg/100 g de músculo). As percentagens de C 18:3 n-3, C 20:4 n-6, C 20:5 n-3, AGPI, n-6 e n-3 do patinho (0,98, 1,88, 0,74, 9,34, 7,61 e 1,73%) foram superiores (P<0,05) às observadas no acém (0,38, 1,13; 0,39; 4,22; 3,45 e 0,77%) e contrafilé (0,53; 0,93; 0,26; 5,16; 4,37 e 0,79%), respectivamente. Desta forma, os cortes que apresentaram menores riscos à saúde humana com relação ao perfil de ácidos graxos, foram o contrafilé, o coxão mole e o patinho. Palavras-chave: Carne, confinamento, cortes, novilhas, qualidade de carne AbstractThis work was carried-out to study the chemical composition and fatty acids profile among chuck, rump, striploin, topside and knuckle from crossbred (½ Nellore x ½ Charolais) heifers finished in feedlot. The knuckle, striploin and topside showed higher (P<0.05) moisture (75.19, 73.87 e 74.36%) and ash contents (1.09; 1.08 and 1.13%) than the chuck (71.18 e 0.93%) and rump (71.58 e 1.07%), respectively. On the other hand, lipid contents of chuck (7.40%) and rump (5.19%) were higher (P<0.05) than striploin (2.42%), topside (1.76%) and knuckle (1.69%). The chuck cholesterol content (57.63mg/100 g of muscle) was higher (P<0.05) than striploin (49.71mg/100 g of muscle) and topside (46.55mg/100 g of muscle). The knuckle percentages of C 18:3 n-3 (0.98%), C20:4n-6 (1.88%), C 20:5 n-3 (0.74%), AGPI (9.34%), n-6 (7.61%) and n-3 (1.73%) were higher (P<0.05) than the values observed on knuckle (0.38; 1.13; 0.39, 4.22; 3.45 and 0.77%) and striploin (0.53; 0.93; 0.26; 5.16; 4.37 and 0.79%). The cuts that would present lower risk to human health, in relation to fatty acids, would be the striploin, topside and knuckle.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.