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不同凝乳酶在干酪成熟期的理化和生化特性研究 总被引:2,自引:0,他引:2
以当日鲜奶为原料,EZAL、MAOLL作为发酵剂,微生物酶、小牛皱胃酶、胃蛋酶、羔羊皱胃酶、木瓜蛋白酶和无花果蛋白酶作为凝乳酶生产硬质干酪,研究了不同凝乳酶在干酪成熟期的理化和生化特性.对这些干酪的理化和生化分析表明,在口感、风味、组织结构等方面,按品质依次为羔羊皱胃酶>小牛皱胃酶>微生物凝乳酶>猪胃蛋白酶>无花果蛋白酶>木瓜蛋白酶. 相似文献
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《青海环境》2020,(2)
德令哈地区气侯寒冷干燥,如何保障草坪建植质量,简化工序,提高出苗率是工程建设的努力方向。试验设置了草坪播后镇压喷灌(A)、非镇压喷灌(B)、非镇压小水灌溉(C)、非镇压羊粪覆盖喷灌(D)4个处理对比建植模式,利用方差方法分析比较。结果表明:4个处理A、B、C、D出苗均值依次为93株/100cm~2,46株/100cm~2,109株/100cm~2,101株/100cm~2;出苗率依次为35.8%,17.6%,41.9%,39.0%。处理不镇压喷灌(B)出苗数最少,与其他3种处理A、C、D极显著差异;处理A、C、D之间无差异。按照建设标准评价,则处理C、D符合,处理B、A不符合。结论:模式选择的顺序是:处理C、D、A,处理B不宜采用。应调整灌溉制度,建设种苗发育环境。 相似文献
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通过电化学性能测试、全浸腐蚀试验和锈层形貌观察等方法,研究了四种不同显微组织的Q500E钢的耐蚀性能,并分析了显微组织对耐蚀性能的影响机理.结果表明,多边形铁素体+粒状贝氏体以及少量M/A岛(QPF+GBF+M/A)、贝氏体(B)、铁素体+珠光体(F+P)和马氏体+铁素体(F+M)组织钢在中性NaHSO3溶液中表现出不... 相似文献
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面对工作、生活上的种种压力,怎样才能将负面情绪扫地出门?要快乐很简单,只要你懂得运用快乐营养素,就能让你把烦恼和忧郁通通赶走!蛋白质,维生素A、B、C、D、E,脂肪……现在就让我们一起揭开它们的神秘面纱吧! 相似文献
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《青海环境》2018,(4)
本试验自制重金属污染土作为研究样本,试验采用室内盆栽试验,试验设置6个不同处理:未添加化学修复剂(CK)、2%骨炭(A)、2%活性炭(B)、2%磷矿粉(C)、2%土壤修复剂Ⅰ(D)和2%土壤修复剂Ⅱ(E),与已筛选出的富集乡土植物油菜、马铃薯、狼尾草、小麦、刺儿菜、巴天酸模相配合,对重金属污染土壤进行修复,测定土壤中重金属含量。结果表明"2%土壤修复剂Ⅱ(E)"修复效果最佳,尤其是与巴天酸模、刺儿菜植物搭配为最佳。因此对重金属污染土壤可采用植物和化学修复相结合的修复方法,修复效果明显。提出了生物修复和化学修复技术结合的污染土壤的修复技术措施,旨在为推动本省污染土壤的修复储备技术和积累经验,为有效合理利用土地环境资源,保持土地资源利用可持续性和延长土地资源使用周期提供了科学依据。 相似文献
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在AQC实验分析中,A、B、C、D批内偏差Sw,批间偏差S_b等的计算是比较繁琐的事,往往一数计算之差,会引起一连串数字的错误,浪费时间和精力;在检查一份AQC报表时,能否不通过大量的数据计算,一眼就可看出计算性错误或数据的不合理性呢?我带着这个问题,通过大量的数据运算,认为A、B、C、D之间,以及A、B、C、D与S_w、S_b之间存在着密切关系,有一定的规律。 相似文献
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松、柏科植物在我国分布极广,为主要木材资源。每采伐1m~3木材能得到约100kg鲜叶,叶中含多种化学成分,如维生系A、D、E、K、C、B_2、α_胡罗卜素等。作者曾对青海云杉(Picea crassifolia KOM)、祁连山圆柏(Sabina pryewalskii KOM)、油松(Pinus tabulaeformis Carr)、青杆 相似文献
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Trametes versicolor decolorized 2000 mg L(-1) of the mono-azo substituted naphthalenic dye Amaranth with no dye sorption observed visually. The changes in the toxicity were assessed over a period of 30 d for the dye-treated viable culture, control (no dye added), and a boiled culture treated with dye, using the Microtox Acute Toxicity assay. Before dye addition, the culture filtrate had some toxicity, which increased after the dye addition. The toxicity of the dye-treated culture decreased during the treatment. The loss of toxicity occurred at the same time, with the loss of color suggesting that detoxification is associated with decoloration. The change in pH was due to natural metabolic processes and had a small effect on detoxification. Because the toxicity of the treatment was similar to that of the control at the end of the treatment, the effluent seems to be safe for release into the environment, potentially rendering this treatment suitable for industrial application. 相似文献
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城镇化是推动我国经济社会发展的重要动力,在高速发展的同时,带来大量污染排放,威胁乡村环境质量与可持续发展。在对乡村生态环境问题剖析的基础上,从战略、实施、方式等层面探索解决思路,围绕科学规划、发展方式、基础建设、管理机制、宣传教育等方面分析关键点,加强乡村环境保护,保障城镇化建设健康发展,为促进农村农业持续发展提供持久动力。 相似文献
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泵站树状给水管网流量具有随机性,而这种随机性变化会直接影响管网的建设费用和动力费用.针对这-特点,应用随机规划原理,建立泵站树状给水管网机会约束模型,编写基于随机模拟的遗传算法程序求解该模型.机会约束模型能较客观地反映该管网的实际工况,使优化设计结果更符合实际. 相似文献
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Günay Kocasoy 《Environmental management》1989,13(4):469-475
The increase in the number of tourists visiting a coast is desired by most of the countries for economic reasons. However, this increase in tourism may cause pollution of the sea. This can be only avoided by proper planning and by predicting the carrying capacity of the coast in terms of sea pollution. This is especially important for developing countries where part of the wastewater is discharged without any treatment into the sea.In the present study the beaches were classified according to their use — and consequently the amount of waste discharged into the sea — into four groups: (1) coasts that are used only for swimming and recreational purposes; (2) coasts used simultaneously for dwelling, swimming, and recreational purposes; (3) coasts along which only dwellings exist; and (4) natural and man-made harbors, i.e., coasts used as shelters. During the survey,40,320 observations were made between December 1985 and February 1988 to determine the effect of the number of tourists on seawater quality. The results obtained were analyzed by a multilinear regression program to obtain an empirical equation giving the extent of the sea pollution in terms of coliform concentration as a function of population density and some other environmental factors.The equations derived in this study enable the determination of the carrying capacity of a beach in terms of pollution as well as the expected degree of pollution corresponding to a given population density. Furthermore, it allows the prediction of the extra carrying capacity that can be obtained by improving the waste-disposal conditions. 相似文献
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阐释了信息产业专门化街区的内涵,结合对合肥市黄山路信息产业专门化街区构成要素的分类及其邻近度的分析,分别从空间结构演化、景观演化、功能演化三方面阐述了合肥市黄山路由"电子一条街"向"信息产业专门化街区"的总体演化阶段,探讨了信息产业专门化街区的未来发展趋势。 相似文献
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