J. Gelhausen , T. Friehs , N.-F. Paul , T. Krebs , J. Mörlein , J. Knöll , I. Wilk , J. Tetens , D. Mörlein
{"title":"Stunning pigs with inert gases at low residual oxygen does not compromise meat quality","authors":"J. Gelhausen , T. Friehs , N.-F. Paul , T. Krebs , J. Mörlein , J. Knöll , I. Wilk , J. Tetens , D. Mörlein","doi":"10.1016/j.meatsci.2025.109898","DOIUrl":null,"url":null,"abstract":"<div><div>In the project for “Testing Inert Gases in order to Establish Replacements for high concentration carbon dioxide (CO<sub>2</sub>) stunning for pigs at the time of slaughter” (TIGER), we were investigating the effect of different inert gas atmospheres on meat quality. In two subsequent experiments a total of 1138 pigs were either stunned with argon or nitrogen (N<sub>2</sub>) as well as mixtures of those with 10–30 % CO<sub>2</sub> or two high concentration CO<sub>2</sub> atmospheres. With a newly developed and patented gas supply technology, we were able to create stunning atmospheres with a residual oxygen concentration < 1 %. In both experiments various meat quality traits (pH, temperature, and electrical conductivity) were assessed in <em>M. longissimus thoracis et lumborum</em> (LTL) and <em>M. semimembranosus</em> (SM) 45 min and > 24 h post mortem, respectively. Drip loss, cooking loss, razor shear force and color (CIE <em>L*a*b</em>) were examined for the LTL (experiment 1) and for the SM (experiment 2). Additionally, sensory analyses were carried out in the second experiment. Statistically significant differences between meat quality traits were found in both experiments. For instance, a reduction of pH<sub>45</sub> in LTL was observed when animals were stunned with high concentrations of N<sub>2</sub>, yet without causing the formation of pale, soft & exudative meat. Overall, the significant differences observed are considered of minor importance for consumers and meat processors. Therefore, we conclude from these experiments that the alternative gas mixtures investigated herein are not inferior to conventional CO<sub>2</sub> stunning concerning meat quality of LTL and SM.</div></div>","PeriodicalId":389,"journal":{"name":"Meat Science","volume":"228 ","pages":"Article 109898"},"PeriodicalIF":7.1000,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Meat Science","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0309174025001597","RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Agricultural and Biological Sciences","Score":null,"Total":0}
引用次数: 0
Abstract
In the project for “Testing Inert Gases in order to Establish Replacements for high concentration carbon dioxide (CO2) stunning for pigs at the time of slaughter” (TIGER), we were investigating the effect of different inert gas atmospheres on meat quality. In two subsequent experiments a total of 1138 pigs were either stunned with argon or nitrogen (N2) as well as mixtures of those with 10–30 % CO2 or two high concentration CO2 atmospheres. With a newly developed and patented gas supply technology, we were able to create stunning atmospheres with a residual oxygen concentration < 1 %. In both experiments various meat quality traits (pH, temperature, and electrical conductivity) were assessed in M. longissimus thoracis et lumborum (LTL) and M. semimembranosus (SM) 45 min and > 24 h post mortem, respectively. Drip loss, cooking loss, razor shear force and color (CIE L*a*b) were examined for the LTL (experiment 1) and for the SM (experiment 2). Additionally, sensory analyses were carried out in the second experiment. Statistically significant differences between meat quality traits were found in both experiments. For instance, a reduction of pH45 in LTL was observed when animals were stunned with high concentrations of N2, yet without causing the formation of pale, soft & exudative meat. Overall, the significant differences observed are considered of minor importance for consumers and meat processors. Therefore, we conclude from these experiments that the alternative gas mixtures investigated herein are not inferior to conventional CO2 stunning concerning meat quality of LTL and SM.
期刊介绍:
The aim of Meat Science is to serve as a suitable platform for the dissemination of interdisciplinary and international knowledge on all factors influencing the properties of meat. While the journal primarily focuses on the flesh of mammals, contributions related to poultry will be considered if they enhance the overall understanding of the relationship between muscle nature and meat quality post mortem. Additionally, papers on large birds (e.g., emus, ostriches) as well as wild-captured mammals and crocodiles will be welcomed.