本文以8 kg左右不同品种乳猪为研究对象,采用逐级递增的ZnSO4腹腔注射法诱导,通过巯基显色法检测,对不同品种猪肝金属硫蛋白的合成量进行了研究.结果表明:在相同条件下不同猪源金属硫蛋白含量依次为,大白×荣昌>杜洛克×大白>杜长大三元杂交猪>野猪×杜洛克.因此,每头体重在8 kg左右的乳猪金属硫蛋白提取量达到了1.08 mg,相对市售杜长大大杂交猪提取金属硫蛋白含量提高了36%.该品种可降低生产成本,适合产业化生产.

Objective To rapidly detect metallothionein(MT) content in cosmetics.Methods With the method of atomic absorption spectrophotometer,cosmetic sample of A,B,C and D were analyzed under the conditions of 213.9 nm as detection wavelength.And quantitative determination of MT in cosmetics were measured by external standard method to discuss the condition of this method.Results An analysis method in food fast detection of MT by atomic absorption spectrophotometer was established.This method had good linearity,high repeatability.And its adding standard recovery was 92.4%-96.4%.Conclusion This method has certain advancement and practical significance for detection of MT content in cosmetics,and it has provided a reliable means for detection of MT content in cosmetics to satisfy the actual sample analysis.

This paper analyzed the middle-scale production technique and quality control methods of vacuum low-temperature fried mushroom chips,listed the key process in real production,pilot production yields and the product quality indicators.Meanwhile,the paper discussed the issues relevant to the impact of pretreatment and vacuum low-temperature fired technique on product quality,and provided a better experience for industrialized manufacture.

Metallothionein(MT) which was defined as a low molecular weight and high sulfhydryl content protein could combine metal ion.Metallothionein had a strong role in the elimination of free radicals,so it could be used alone or combined with GSH,VC and VE as a nutritional additives.Moreover,MT was effective to inhibit lipid peroxidative damage,protect cell,degrade blood viscosity,improve blood circulation and increase the immune function.The article mainly described the exploratory development of MT in the absorption dynamics,medicine,cosmetics and the health food.

乳房炎是奶牛的常见疾病之一,给奶牛业造成巨大的经济损失.尤其是隐性乳房炎,发病率高,不易治愈.据报道,美国、日本的发病率为62.1%[1],我国为73.9%[2].乳房炎主要由于细菌感染引起,主要病原菌包括金黄色葡萄球菌、无乳链球菌、大肠杆菌等[3].

相关资料表明,脂多糖(LPS)的免疫调节效应能辅助机体的细胞免疫和体液免疫,促进机体的抗感染能力.但是LPS在抗感染过程中对于抗氧化系统所起的具体作用尚未明晰,而免疫系统与抗氧化系统有着密不可分的联系,免疫系统依赖抗氧化系统产生大量的自由基来杀伤入侵的病原体,大量诱生的自由基在抗感染的同时也会杀伤免疫细胞.

<正>1怀孕1个月左右此期的饲养管理是保证胎儿正常生长发育的关键时期。如仅供应饲草,由于营养不全虽能达到饱腹,但不能满足其各种营养需要易流产,养殖户应根

北京市通州区科委在实施科技工作中,明确提出了建设创新服务体系和创业孵化体系、创新农业科技推广服务体系、加快科技成果转化和推广、加强农民科技培训和科学技术普及等的工作任务,突出面向三个重点,即:突出服务于"三农",为实施"221"行动计划提供科技支撑;突出服务于新城区建设,认真肩负起科教兴区的责任;突出组织实施科技"三大行动",促进企业创新,强化首都科技优势向本区辐射扩散,发挥溢出效益.