低盐乳酸菌法与传统法腌干鱼制品的风味比较

为了研究不同腌制方法对鱼肉风味的影响,为腌干鱼制品加工新技术的进一步优化和应用提供理论依据,采用固相微萃取-气相色谱-质谱(SPME-GC-MS)联用法分析,鉴定比较了鲜红牙原料采用低盐乳酸菌法和传统法腌干鱼制品的风味成分变化。结果表明:鲜红牙、低盐乳酸菌法腌干鱼和传统腌干鱼肉中分别检测出80、110、91种挥发性成分,醛、醇、酮类化合物是构成腌干鱼肉独特风味的主要成分。经低盐乳酸菌法腌干的鱼肉挥发性物质对风味贡献较大的醛、醇、酮类化合物总量达35种,而鲜鱼和传统腌干鱼肉中分别只有17和21种。低盐乳酸菌法腌干鱼肉风味物质中含有大量的醇、醛类物质,但不含有胺类物质,在保持传统腌制鱼肉风味的基础上增加了特有的花香味、水果香味及酒香味,提升了鱼肉感官品质。所以采用低盐结合复合乳酸菌法制备腌干鱼,不仅能缩短腌制时间,还能提升腌干鱼肉特有的风味,而且防止了胺类物质的产生,显著提高产品的品质和安全性。     

Can fermented soybean meal and squid by‐product blend be used as fishmeal replacements for Japanese flounder (Paralichthys olivaceus)?

An experiment was carried out to evaluate fermented soybean meal and squid by‐product blend (1:1) (FP) as replacement of fishmeal (FM) for Japanese flounder, Paralichthys olivaceus. Five isocaloric (19 kJ g^?1) diets were prepared by replacing 0 (FP0), 12 (FP12), 24 (FP24), 36 (FP36) and 48% (FP48) FM protein with FP. Triplicate groups of juveniles (mean weight of 3.9 g) were delivered the test diets for 8 weeks in a flow‐through sea water system. The results showed that there were no significant differences (P > 0.05) among the growth rates of fish fed FP0, FP12, FP24 and FP36 diets. Growth and nutrient utilization parameters were significantly reduced in fish fed FP48 diet. Although, whole body proximate composition of fish were not significantly affected by the dietary treatments compared to the control; methionine and phenylalanine contents were significantly decreased in FP48 group. Protein retention was also significantly decreased in the similar group of fish. Dietary treatments did not alter most of the plasma metabolites, while some of the health parameters were improved in the replacement groups. Results suggested that FP is a potential candidate for alternative protein ingredient in aquafeed and can replace 36% FM protein in the diet of Japanese flounder.     

Effects of Packaging Method on Salt-Cured Cod Yield and Quality During Storage

Different packaging conditions of salt-cured cod fillets were studied during 2-years chilled storage. Yield and quality of salt-cured Atlantic cod fillets packed in sealed polystyrene boxes or in traditional cardboard boxes were compared. After 4 months, yield decreased by approximately 10% and decreased further when packed in cardboard boxes. Lipid oxidation was low after 12 months, and no microbiological spoilage was registered. The total amount of bacteria in the fish reduced with storage time, independent of packaging. The reddish color of halophilic bacteria was detected after 7–8 weeks at 18°C, but not if packed with MAP.     

Capricious bioinvasions versus uncoordinated management strategies: how the most unlikely invaders can prosper under the current UK legislation framework

相似文献   

气相色谱法测定水产品中氯霉素残留

介绍了水产品中氯霉素残留量测定的气相色谱法。样品中的氯霉素用乙酸乙酯提取,正己烷去脂肪,过Sep-C18柱进行净化,用BSTFA-TMCS衍生后进带有微电子俘获器的气相色谱仪检测。该方法的线性范围为0.5～500μg·L-1,相关系数r=0.999,最低检测限为0.1μg·kg-1,相对标准偏差为4.3%～11.0%,向样品中分别添加1μg·kg-1、10μg·kg-1和20μg·kg-13个浓度水平的氯霉素,回收率分别为62.0%、88.2%和96.4%。方法灵敏度高,准确可靠,适合水产品中氯霉素残留量的检测。     

灯笼鱼资源的开发与利用

灯笼鱼属于中深海鱼类,广泛分布于全球各大洋中,资源量巨大。灯笼鱼通常被用于加工饲料鱼粉和鱼油,市场价值较低,因此被称为低值鱼类,长期不被人们重视。近年来,随着海洋渔业资源日趋紧张,人们开始重新关注全球的灯笼鱼资源,在灯笼鱼的资源调查、探捕和产品加工方面进行了大量的研究和实践,开发出了可供人类消费的灯笼鱼食品。尽管在灯笼鱼的研究和开发利用方面还有许多问题尚待解决,但是越来越多的渔业专家对灯笼鱼资源开发利用的前景抱有信心。     

豆制品中胰蛋白酶抑制剂活性测定方法研究

利用紫外分光光度计，对豆制品中胰蛋白酶抑制剂在抑制牛胰蛋白酶活性反应前后的吸光值差异制作差值曲线，从而得出斜率与抑制剂活性之间关系的方法。并通过反复的实验对比，最终可以快速准确地测定大豆制品中胰蛋白酶抑制剂活性。     

吉林省栗山天牛专项调查技术报告

栗山天牛专项调查结果表明,栗山天牛是我省目前发生面积最大、危害最重、造成经济和生态损失最大的林业有害生物。通过专项调查,全面掌握了栗山天牛在吉林省的分布面积、发生面积和成灾面积,并将栗山天牛的分布、发生与成灾面积落实到了具体林班和小班。为进一步监测栗山天牛的发生、发展趋势与危害情况提供了基础数据,为制定栗山天牛防治对策提供了科学依据。     

当代传统农学目录著作误收宋代农书考辨

《中国农学书录》《中国农业古籍目录》两部当代农学目录学著作,堪称研究传统农书的架海金梁,是为学者入门、研究必备的案头书。但两书或囿于时代条件限制,或因书成众手,误收的情况在所难免。通过研究考辨,可知两书误收宋代农书29种,兹为揭橥以提高其著录宋代农书部分的准确性,从而使之发挥更大、更好的作用。     

陇南地区药用植物资源保护与开发利用

陇南地区的药用植物资源具有门类较全、分异明显等特点．然而市场需求增长过快、片面追求经济效益、公众保护意识不强滥采滥挖导致大量野生药用物种濒危甚至绝种．介绍了陇南地区药用植物资源的概况及保护与利用现状,并阐述了陇南地区药用植物资源可持续利用的战略措施．