共查询到20条相似文献,搜索用时 15 毫秒
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皮革缺陷检测是利用计算机视觉技术将皮革表面的异常区域即缺陷区域从背景中分割出来.对目前应用到皮革缺陷检测的方法按空域和频域两大类型进行了分析和阐述,指出各种方法的优缺点,并对各种方法的实验效果进行了综合评估. 相似文献
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A comparison was made of Warner-Bratzler (W-B) shear with penetration and compression tests of the texture of frankfurters undergoing textural deterioration during storage in vinegar pickle. The various measurements were linearly covariant but the intercepts were finite, indicating the different tests were not measuring the same properties in the same proportions. Covariant plots of W-B shear of whole frankfurters and penetration of the interior gel showed that the skin did not deteriorate to the extent of the interior emulsion did. Covariant plots of work and maximum force values for all three techniques showed that the maximum stress forces decreased more rapidly than did the average work function during storage in pickle. 相似文献
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食品安全是人类健康的重要保障与前提。因此,建立食品病原微生物的快速检测方法对于食品安全及人类健康有着重要的意义。简要的综述食品微生物快速检测技术的研究进展。 相似文献
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对3种不同烹制方法(水煮、炖煮和高压蒸煮)制得的猪肉和汤汁进行感官评定、总蛋白SDS-PAGE凝胶电泳以及总氮(TN)、水溶性氮(WSN)、非蛋白氮(NPN)和游离氨基酸(FAA)含量的比较研究。感官评定结果表明3种工艺分别为水煮30min,炖煮2h和高压蒸煮15min时,烹制所得肉和汤汁口感与风味最佳。总蛋白SDS-PAGE凝胶电泳图谱显示炖煮肉中大分子蛋白降解最为显著,炖煮肉汤中水溶性蛋白含量最高。水煮、炖煮和高压蒸煮使肉汤体系水溶性氮总量分别比鲜肉增加12%、24%和5%,非蛋白氮总量分别增加42%、59%和33%,游离氨基酸总量分别增加61%、78%和51%。炖煮猪肉的蛋白质降解程度比水煮和高压蒸煮高,且大部分蛋白质降解产物转移到汤汁中,赋予肉汤最优的营养和风味。 相似文献
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JANNITH N. GROS PAULA M. HOWAT MARGARET T. YOUNATHAN ARNOLD M. SAXTON KENNETH W. McMILLIN 《Journal of food science》1986,51(5):1152-1155
THE THIOBARBITURIC ACID (TBA) test and sensory evaluations were used to assess the effectiveness of three dry heat preparations—microwave, microwave/convection combination and oven broiling—in retarding warmed-over flavor (WOF) development in ground beef patties. Animals finished on pasture, 60 and 120-day grain were used. The oven broiling method was found to delay WOF development in refrigerated patties. Taste panelists failed to detect differences in flavor as a result of cooking or animal diet. There was a significant (P < 0.001) negative correlation (r=?0.66) between aroma and flavor scores and TBA values over time. Panelists were able to detect deteriorating changes in flavor and aroma after refrigerated storage. 相似文献
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转基因食品的定量PCR检测方法 总被引:6,自引:0,他引:6
近年来转基因食品定性检测方法发展迅速,然而目前转基因成分(GMO)的准确定量检测在国际贸易中日趋重要.我们这里介绍三种定量检测方法半定量PCR法,定量竞争PCR(QC-PCR)法和实时定量PCR法.半定量PCR法比较简单,但结果不是很精确.定量竞争PCR的特点是含有内部标准子.近来开展的实验室合作研究表明,与定性PCR法相比,定量竞争PCR降低了实验室之间的误差.而实时定量PCR法可在提取DNA后3h内,测出每克起始样品的总DNA量及2pg转基因成分的量,但这套PCR系统目前价格昂贵. 相似文献
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本文主要介绍了食源性沙门氏菌污染的危害,并探讨了几种常见的先进的快速检测方法。这些快速检测方法对于沙门氏菌的检测具有良好的应用前景。 相似文献
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甲醛具有高毒性,长期接触对人体有极其严重的伤害。因此,测量空气中甲醛含量非常必要,特别是甲醛应用较多的地方,这样才能有效采取相应的措施予以应对。本文主要对国内各种甲醛检测方法的文献予以介绍与总结。 相似文献