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根据猪胴体加工工艺,重点介绍在胴体加工过程中的输送、旋毛虫检验、同步检验、劈半等工艺及设备,同时,笔者结合多年的实践经验,提出了一些见解及操作方法. 相似文献
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为了降低实际生产中猪半胴体在预冷过程中的失水率,挑选宰后45 min内的质量、级别接近的热鲜猪半胴体90爿,随机分为3组(每组30爿),一组作为实验组喷涂胶原蛋白质复合成膜剂,一组作为喷水对照组喷涂同温度的水,一组作为空白对照组不做喷涂处理,研究胶原蛋白质质量分数为1.25%、甘油质量分数为2.00%、分子蒸馏单硬脂酸甘油酯质量分数为1.50%的复合成膜剂对猪半胴体失水率及相关品质的影响。结果显示:常规风冷24 h后,实验组猪半胴体预冷失水率为1.60%,贮藏损失为7.01%,蒸煮损失为37.33%,猪背膘皮亮度值为61.9,红度值为7.5,黄度值为7.742,菌落总数lg(CFU/cm2)为4.363,大肠菌群数lg(MPN/cm2)为3.572。其中,失水率比喷水对照组、空白对照组分别降低0.50%、0.60%,并存在显著差异(p0.05);背膘皮的黄度值比喷水对照组、空白对照组分别降低1.953、2.046,并存在显著差异(p0.05);背最长肌的贮藏损失、蒸煮损失,背膘皮的亮度值、红度值,猪半胴体表面的微生物数量均没有显著变化(p0.05)。证明胶原蛋白质复合成膜剂具有较好的保水效果,还能改善猪皮风干发黄的现象,并且不会对肌肉系水力、货架期产生不利影响。 相似文献
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雾化喷淋冷却对猪半胴体干耗及品质的影响 总被引:4,自引:0,他引:4
为了解决实际生产中猪半胴体在冷却过程中干耗较严重的问题,选取宰后45min内的猪半胴体,研究了不同持续时间(4、8、12、16h)的雾化喷淋冷却处理对猪半胴体干耗及各项品质指标的影响。结果表明:雾化喷淋冷却能显著降低胴体24h冷却干耗,半胴体表面微生物数量稍有上升,喷淋对背最长肌货架期的影响并不显著。随着喷淋持续时间的延长,肌肉保水性降低,但对背最长肌L*、a*、b*值影响不大,脂肪L*值略有上升,且喷淋时间超过12h后脂肪颜色变亮、变灰。各处理组间半胴体冷却速率基本没有差异(p>0.05),16h喷淋组在冷却结束时pH偏低。 相似文献
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HACCP和TQM 综合管理减轻猪胴体污染 总被引:3,自引:1,他引:2
1 HACCP和TQM简介危害分析与关键控制点 (HACCP)和全面质量管理 (TQM )结合监测系统有效地降低了生猪屠宰中胴体的污染比率 ,并显著地减少产品的细菌总数。商业性生猪加工中 ,猪排泄物和食入物是其胴体的主要污染源。经多年实践证明 ,基于生猪处理区的视觉在线监测系统能有效降低生猪屠宰中胴体的污染率。借助电子俘获与显示装置 ,胴体污染完全可归因于特定的操作单元 ;此种情况下 ,有利于采取矫 表 1 屠宰处理作业及在线胴体污染监测系统所需设备的安放位置监测系统的组成和位置作业监测区域LED显示按钮光电眼 (计… 相似文献
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浅谈猪胴体前段加工工艺与设备 总被引:1,自引:1,他引:0
为尽可能节约成本,提高产品质量,围绕屠宰加工流程,提出了在各个加工环节如何选择合适的加工工艺及加工设备,同时,强调在我国特有的国情下,各道工序只有综合配置资源,才能达到最佳效果. 相似文献
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预冷环境及时间对猪胴体冷却损耗的影响 总被引:2,自引:0,他引:2
为了解决传统企业在猪胴体冷却过程中干耗较严重的问题,在春季选取若干宰后猪胴体,研究预冷库内不同位置的风速、温度、相对湿度的变化规律,不同冷却时间和冷库内不同位置对猪胴体冷却损耗的影响。结果表明:预冷库内不同位置之间的风速、温度、相对湿度之间差异对猪胴体预冷损耗存在显著影响(P<0.05),风速大的位置其胴体周围环境相对湿度高,温度低,胴体冷却损耗小;随着预冷时间的延长,猪胴体损耗逐渐增大,且预冷时间对冷却损耗也有显著影响(P<0.05)。 相似文献
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Lorenzo JM Montes R Purriños L Cobas N Franco D 《Journal of the science of food and agriculture》2012,92(6):1311-1317
BACKGROUND: The influence of sex and location of fat in the carcass on the fatty acid profile of Celta pigs was studied. Twenty pigs (10 castrated males and 10 females) from the Carballina line were used. RESULTS: The fatty acids composition was predominated by monounsaturated fatty acids (MUFA; approximately 48% of total methyl esters), followed by saturated fatty acids (SFA; approximately 40% of total methyl esters) and, finally, polyunsaturated fatty acids (PUFA; approximately 12% of total methyl esters). The sex and location of fat in the carcass showed significant differences in PUFA and SFA content while both factors were not significantly different with respect to MUFA content. Linoleic, linolenic, eicosatrienoic and arachidonic fatty acids showed the largest difference among the three locations (intramuscular, subcutaneous ventral and subcutaneous dorsal) of the fat in the carcass. CONCLUSION: The fatty acid profile that we observed in the fat of the Celta pigs does not differ greatly from those described by other authors in other autochthonous pig breeds. Principal component analysis offered a good separation of the mean samples according to the sex and location of fat of the pigs. Copyright © 2011 Society of Chemical Industry 相似文献
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The aim of this study was to determine the levels of zearalenone (ZEN) in different feed materials and feedstuffs for pigs, as well as in pig urine and pig meat following contaminated feed consumption. In total, 253 feed material and feedstuff samples were collected from Croatian pig farms. The results revealed the presence of ZEN in significant concentrations, the maximal being found in maize (5522 µg/kg), wheat (3366 µg/kg) and pig fattening feed (1949 µg/kg). In farms in which high feed contamination and pig hyperestrogenism were observed, samples of pig urine (n = 30) and meat (n = 30) were retrieved as well. The mean ZEN concentrations in pig urine and pig meat were 206 ± 20.6 µg/L and 0.62 ± 0.14 µg/kg, respectively. Despite high contamination of feedstuffs responsible for farmed pigs’ intoxication, ZEN levels determined in pig meat were shown to be of little significance for human safety. 相似文献
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本研究对比了雾化增湿与雾化喷淋两种方式对猪胴体预冷干耗的影响。采用超声雾化加湿器来增加预冷环境湿度方式以及气液两相流间歇雾化喷淋的方式分别对猪胴体样品进行预冷处理,以直接冷却猪胴体样品为对照组。实验结果表明:雾化增湿组样品最终平均干耗为1.442%,经14 h雾化喷淋处理的各样品继续冷却至24 h后测得最终平均干耗为1.066%,对照组实验样品最终平均干耗为2.914%。雾化喷淋冷却处理与雾化增湿冷却处理均可使猪胴体冷却速度加快(p<0.05)。雾化喷淋冷却处理与雾化增湿冷却处理均可有效缩短样品干耗达到峰值的时间(p<0.05),其达到峰值时间关系为:雾化喷淋组<雾化增湿组<对照组。雾化喷淋冷却处理与雾化增湿冷却处理均可显著降低猪胴体预冷干耗(p<0.05);雾化喷淋冷却处理比雾化增湿冷却处理降低干耗效果更为理想(p<0.05)。 相似文献
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Jennifer E Wubben David M Albin Vince M Gabert 《Journal of the science of food and agriculture》2000,80(6):757-762
Comparing amino acid (AA) retention levels in pig carcass to true ileal digestible AA intake provides an estimate of the marginal efficiency of AA utilization. Accurate analysis of AA levels in the carcass samples is critical. However, the standard 24 h of hydrolysis does not always provide maximum AA values. A study was carried out to investigate the effect of hydrolysis time on AA measurements in pig carcass. Correction factors to standardize AA levels to 24 h of hydrolysis were also determined. Ground carcass samples were hydrolysed with 6 mol litre−1 hydrochloric acid (HCl) in a 110 °C oven for nine different time periods. Pre‐column derivatization with phenyl isothiocyanate (PITC) was used to determine AA concentrations in all of the samples. Hydrolysis time significantly affected (P < 0.001) AA levels. The highest levels (P > 0.05) of valine, isoleucine, serine, glycine, threonine, alanine, arginine, proline, histidine and phenylalanine were not observed with 24 h hydrolysis. Therefore, correction factors and sequential hydrolysis curves are important for these amino acids. In conclusion, the effect of hydrolysis time should be considered in amino acids analysis. © 2000 Society of Chemical Industry 相似文献
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为提高酱油的生产效率,该文从熟料和制曲方式两个方面介绍了普通皮带输送、绞龙输送、刮板输送和罗茨风机高压吹送以及通风曲池、四角制曲机和圆盘制曲机的优缺点和适用条件。 相似文献