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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

Influências de métodos de abate no bem-estar e na qualidade da carne de bovinos

Neves, Julia Eumira Gomes [UNESP] 07 October 2008 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:28:23Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-10-07Bitstream added on 2014-06-13T20:58:01Z : No. of bitstreams: 1 neves_jeg_me_jabo.pdf: 477191 bytes, checksum: 70fed61627e689ae0c89e87fdf9959e8 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / A finalidade da insensibilização é deixar os animais inconscientes, para que não sofra dor ou aflição durante a degola. O objetivo deste estudo foi avaliar os efeitos de três métodos de abate de bovinos no seu bem-estar e na qualidade da carne. Para a avaliação da eficiência de atordoamento, de seus efeitos na degola e no bem-estar dos bovinos foram testados três métodos de abate/atordoamento: pistola de dardo cativo com penetração (abate1), pistola de dardo cativo sem penetração (abate2) e sem atordoamento (abate3). A posição e o número de disparos nas cabeças dos animais foram medidos nos abates 1 e 2. A sensibilidade dos animais foi avaliada aos 20 e 60 segundos após a sangria nos três abates. A eficiência de sangria foi avaliada pelo método de Roça e Serrano (1995) e mediu-se o pH 24 horas após o abate. No abate 1 a posição do disparo não influenciou o número de disparos no abate 1, mas teve efeito sobre o nível de espasmos musculares 20 segundos após a sangria. O sistema de atordoamento do abate 2 mostrou-se ineficiente, mas este resultado não pode ser generalizado, pois a pressão na pistola utilizada estava abaixo da recomendada, resultando em alta freqüência de animais recebendo dois ou mais disparos para o atordoamento. No abate 3 encontrou-se que 54% dos animais avaliados ainda se apresentaram sensíveis 60 segundos após a realização da sangria. Comparando o abate1 e 3 verificou-se que não existe diferença estatística entre a eficiência de sangria nos diferentes métodos de abates analisados e com relação ao bem-estar animal e eficiência de abate, o abate 1 foi o método mais adequado. / The purpose of stunning animals before slaughtering is to prevent them of any pain or affliction during and after bleeding. The aims of this study were to assess the effects of three stunning methods on cattle welfare and meat quality. Three methods of slaughtering/stunning were assessed: captive bolt pistol with penetration (slaughter 1), captive bolt pistol without penetration (slaughter 2) and with no stunning (slaughter 3). Three indicators of cattle welfare were measured: number of shots per animal (measured in the slaughter 1 and 2, shots position in the animals head and animals’ sensitiveness at 20 and 60 seconds after bleeding (measured in the three slaughter methods). Meat quality was assessed considering bleeding efficiency and pH 24 hours after slaughter. At the slaughter 1 the shot position didn’t affect the number of shots in the slaughter 1. However, it affected the carcass kicking 20 seconds after the bleeding. The stunning system for the slaughter 2 showed poor effectiveness, with a higher number of shots per animal than slaughter 1. This result does not be generalized, since the pressure in the pistols was below the recommended standards. At the slaughter 3, 54% of the assessed animals showed sensitiveness 60 seconds after the achievement of the bleedings. Comparing both slaughters 1 and 3, there was no statistical difference in between them in bleeding effectiveness, but there were important differences in the indicators of animal welfare. The slaughter 1 showed to be the most suitable method.
2

Influências de métodos de abate no bem-estar e na qualidade da carne de bovinos /

Neves, Julia Eumira Gomes. January 2008 (has links)
Resumo: A finalidade da insensibilização é deixar os animais inconscientes, para que não sofra dor ou aflição durante a degola. O objetivo deste estudo foi avaliar os efeitos de três métodos de abate de bovinos no seu bem-estar e na qualidade da carne. Para a avaliação da eficiência de atordoamento, de seus efeitos na degola e no bem-estar dos bovinos foram testados três métodos de abate/atordoamento: pistola de dardo cativo com penetração (abate1), pistola de dardo cativo sem penetração (abate2) e sem atordoamento (abate3). A posição e o número de disparos nas cabeças dos animais foram medidos nos abates 1 e 2. A sensibilidade dos animais foi avaliada aos 20 e 60 segundos após a sangria nos três abates. A eficiência de sangria foi avaliada pelo método de Roça e Serrano (1995) e mediu-se o pH 24 horas após o abate. No abate 1 a posição do disparo não influenciou o número de disparos no abate 1, mas teve efeito sobre o nível de espasmos musculares 20 segundos após a sangria. O sistema de atordoamento do abate 2 mostrou-se ineficiente, mas este resultado não pode ser generalizado, pois a pressão na pistola utilizada estava abaixo da recomendada, resultando em alta freqüência de animais recebendo dois ou mais disparos para o atordoamento. No abate 3 encontrou-se que 54% dos animais avaliados ainda se apresentaram sensíveis 60 segundos após a realização da sangria. Comparando o abate1 e 3 verificou-se que não existe diferença estatística entre a eficiência de sangria nos diferentes métodos de abates analisados e com relação ao bem-estar animal e eficiência de abate, o abate 1 foi o método mais adequado. / Abstract: The purpose of stunning animals before slaughtering is to prevent them of any pain or affliction during and after bleeding. The aims of this study were to assess the effects of three stunning methods on cattle welfare and meat quality. Three methods of slaughtering/stunning were assessed: captive bolt pistol with penetration (slaughter 1), captive bolt pistol without penetration (slaughter 2) and with no stunning (slaughter 3). Three indicators of cattle welfare were measured: number of shots per animal (measured in the slaughter 1 and 2, shots position in the animals head and animals' sensitiveness at 20 and 60 seconds after bleeding (measured in the three slaughter methods). Meat quality was assessed considering bleeding efficiency and pH 24 hours after slaughter. At the slaughter 1 the shot position didn't affect the number of shots in the slaughter 1. However, it affected the carcass kicking 20 seconds after the bleeding. The stunning system for the slaughter 2 showed poor effectiveness, with a higher number of shots per animal than slaughter 1. This result does not be generalized, since the pressure in the pistols was below the recommended standards. At the slaughter 3, 54% of the assessed animals showed sensitiveness 60 seconds after the achievement of the bleedings. Comparing both slaughters 1 and 3, there was no statistical difference in between them in bleeding effectiveness, but there were important differences in the indicators of animal welfare. The slaughter 1 showed to be the most suitable method. / Orientador: Mateus José Rodrigues Paranhos da Costa / Coorientador: Roberto de Oliveira Roça / Banca: Pedro Eduardo de Felício / Banca: Pedro Alves de Souza / Mestre
3

Arterial versus Venous Fluid Resuscitation; Restoring Cardiac Contractions in Cardiac Arrest Following Exsanguinations

Youssef, Asser M., Hamidian Jahromi, Alireza, Simpkins, Cuthbert O. 06 August 2016 (has links)
Background: Arterial cannulation and intra-arterial (IA) fluid and blood resuscitation in the patients with severe shock is an easier approach compared with the intravenous (IV) access if concerns regarding the efficiency and safety of this approach are addressed. Objectives: We hypothesized that IA fluid resuscitation is more effective than IV resuscitation in restoring cardiac contractions (CC) of cardiac-arrested mice following severe hemorrhagic shock. Methods: Mice (N = 22) were anesthetized using ketamine/xylazine. Arterial and venous systems accessed through cannulation of the carotid artery and the Jugular vein, respectively. As much blood as possible was aspirated from the carotid artery access. Mice were observed until the complete cessation of chest wall motions. Following 30 seconds delay, IV (N = 5) and IA access (N = 6) were used for fluid resuscitation using Ringer Lactate (RL) in a similar volume to the aspirated blood. Mice were observed for restoration of chest wall motions. In phase-II of the study, after cessation of chest motions, mice (N = 11) underwent a thoracotomy and CCs were observed. In three mice, IV RL Infusion after cardiac arrest failed to restore CCs and was followed by IA RL infusion. In eight mice, following cardiac arrest intermittent IA RL infusion was performed. Results: While IV RL Infusion failed to restore chest motion in mice (N = 5), IA RL infusion restored chest motion in all mice examined (N = 6) (P = 0.0067). In three mice, IV RL infusion after cardiac arrest showed no effect on CC. After failure of venous infusion, IA RL infusion was performed which resulted in restoration of CC for 13.33 +/- 1.76 minutes. In eight mice, intermittent IA infusion of RL after cardiac arrest, sustained CC for 31.43 +/- 10.9 minutes (P = 0.017). Conclusions: IA fluid resuscitation is superior to IV resuscitation in hemorrhagic shock induced cardiac arrest.

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