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      Avaliação físico química da carne de jacaré-do-pantanal (Caiman yacare Daudin 1802) de idades diferentes Translated title: Physichist chymistry evaluation of swampland alligator meat (Caiman yacare Daudin 1802) of different ages

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          Abstract

          Com o objetivo de avaliar a composição química e física da carne de jacaré-do-pantanal (Caiman yacare Daudin 1802), de idades diferentes, foram coletadas amostras de dois cortes de 10 jacarés-do-pantanal, sendo: 05 animais 14 meses e 05 animais com 26 meses, criados em cativeiro. Os cortes utilizados foram filé da cauda e filé do dorso. Foram determinados na composição química: umidade, proteína, extrato etéreo e cinzas; e na composição física: perda de peso por cozimento (PPC) e força de cisalhamento (FC). Houve interação (P<0,05) para umidade e para força de cisalhamento (FC). Os animais com 14 meses apresentaram média de umidade mais elevada (76,75%) no filé de cauda do que os animais de 26 meses (74,48%). As médias de extrato etéreo variaram de: 0,40% a 0,54% entre os cortes para os animais de 14 meses e de 0,51% a 0,84% para os animais de 26 meses. Os valores de proteína encontrados foram: 23,57% no filé de cauda e 24,37% no filé de dorso nos animais de 14 meses; e de 24,26% no filé de cauda e 23,74% no filé de dorso para os animais de 26 meses. O valor médio da PPC nos animais com 14 meses foi maior (40,02%), do que nos animais de 26 meses (33,82%). As médias de FC foram maiores nos animais com 26 meses (4,47 kgf). O corte dorso apresentou médias superiores de FC (3,81 kgf) em relação ao corte da cauda. Os animais abatidos com idade de 14 meses apresentaram carne mais macia e valores de extrato etéreo inferiores aos animais abatidos com 26 meses, demonstrando por estes parâmetros uma melhor qualidade física e química.

          Translated abstract

          With the objective of evaluating the chemical and physical composition of swampland alligator meat (Caiman yacare Daudin 1802), of different ages, samples of two courts of 10 swampland alligator were collected, being: 05 animals 14 months and 05 animals with 26 months, servants in captivity. The used courts were of tail and neck. They were certain in the chemical composition: moisture, protein, ethereal extract and ashes; and in the physical composition: weight loss for cooking (WLC) and break force (BF). There was interaction (P<0.05) for moisture and for break force (BF). The animals with 14 months presented average of higher moisture (76.75%) in the tail that the animals with 26 months (74.48%). The averages of ethereal extract varied of: 0.40% to 0.54% among the courts for the animals of 14 months and of 0.51% to 0.84% for the animals of 26 months. The found protein values were: 23.57% in the tail and 24.37% in the neck in the animals of 14 months; and of 24.26% in the tail and 23.74% in the neck for the animals of 26 months. The medium value of WLC, in the animals with 14 months was larger (40.02%), that in the animals of 26 months (33.82%). The animals abated with age of 14 months presented softer meat and values of ethereal extract smaller the animals abated with 26 months, demonstrating for these parameters a better physical and chemical quality.

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          Official methods of analysis of the association of official analytical chemists

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            Prerigor and postrigor changes in tenderness of ovine longissimus muscle.

            A novel approach was used to measure the tenderness of prerigor ovine longissimus thoracis et lumborum by avoiding the confounding effects of heat-induced shortening resulting from cooking prerigor meat. The objective was to determine the tenderness of the muscle at the time of slaughter and to monitor changes in tenderness during rigor development and postmortem aging. Nine Romanov and 12 Finnsheep rams were slaughtered at 49.3 kg live weight. Samples of longissimus thoracis et lumborum were removed at 0, 3, 6, 9, 12, 24, 72, or 336 h after exsanguination. Five of the eight sample times were represented in each carcass and all carcasses were sampled at 0, 12, and 24 h. Prerigor muscle samples (0, 3, 6, 9, and 12 h) were clamped between two metal plates before excision to prevent shortening. The samples were frozen at -30 degrees C then stored at -5 degrees C for 10 d to allow glycolysis to proceed to completion, and thus ultimate pH and complete rigor mortis were attained. The longissimus thoracis et lumborum was then cut into chops and cooked and shear force was determined. Sarcomere length decreased through 24 h postmortem, then increased slightly through 336 h postmortem. Warner-Bratzler shear force values were 5.1 kg at 0 and 3 h, increased to 8.3 kg from 3 to 9 h, and then declined to 3.1 kg from 24 to 336 h postmortem. These data imply that longissimus thoracis et lumborum at slaughter is intermediate in tenderness, rigor shortening toughens the meat, and proteolysis tenderizes the meat, resulting in more tender meat after 14 d of aging than at slaughter.
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              Tecnología e hygiene de la carne

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                Author and article information

                Journal
                cagro
                Ciência e Agrotecnologia
                Ciênc. agrotec.
                Editora da Universidade Federal de Lavras (Lavras, MG, Brazil )
                1413-7054
                1981-1829
                October 2007
                : 31
                : 5
                : 1430-1434
                Affiliations
                [01] Lavras MG orgnameUniversidade Federal de Lavras orgdiv1Departamento de Ciência dos Alimentos
                [02] Cáceres MT orgnameCooperativa de criadores de jacaré-do-pantanal
                Article
                S1413-70542007000500024 S1413-7054(07)03100524
                cab0a141-f7f5-4eea-9c0e-81a21dc9f791

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 20 September 2005
                : 02 October 2006
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 21, Pages: 5
                Product

                SciELO Brazil

                Self URI: Texto completo somente em PDF (PT)
                Categories
                Ciência e Tecnologia de Alimentos

                captivity,sustentabilidade,zoocriadouros,Animal silvestre,Wild animal,maintainable

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