共查询到20条相似文献,搜索用时 296 毫秒
1.
2.
大蒜多糖具有众多的生理功能,有很高的经济价值。以大蒜为原料,采用超声辅助酶解法提取大蒜多糖,具有高速、高效、节能、环保等优点。在单因素试验的基础上,通过正交试验进一步优化提取工艺条件,确定影响提取率的主次因素分别为超声酶解时间、料液比、提取温度和提取时间。结果表明,先期酶解条件为温度50℃、pH5.O、酶用量5.0%,最佳提取条件为超声波酶解时间40min、料液比(m/V)1:3、提取温度85℃、提取时间50min,多糖提取率达72.64%。 相似文献
3.
4.
多花黄精总蛋白质提取工艺优化 总被引:1,自引:0,他引:1
对多花黄精主根与须根总蛋白质的提取工艺进行了研究.在对料液比、离心转速、NaCl溶液的浓度等进行单因素试验的基础上,通过正交试验确定了多花黄精主根与须根总蛋白质提取的最佳工艺条件,即对多花黄精主根蛋白质的提取最佳条件为料液比1:15、NaCl浓度0.10mol/L、转速为2500r/min;须根蛋白的提取最佳条件为料液比1:15、NaCl浓度0.20 mol/L、转速为4500r/min.在相同的提取条件下,多花黄精主根与须根的蛋白质得率差异显著.须根中蛋白质的含量与主根的差异性不显著,须根的利用价值也很高,有待于进一步开发利用. 相似文献
5.
超声波辅助提取毛竹叶中叶绿素的研究 总被引:1,自引:0,他引:1
在超声波作用下,通过使用不同溶剂,研究了毛竹叶中叶绿素的提取方法,并对其提取液中叶绿素的含量进行了检测。结果表明,以丙酮为提取溶剂,料液比为1∶40,超声波提取30min,是从毛竹叶中提取叶绿素的最佳技术工艺。 相似文献
6.
7.
长梗黄精主根与须根多糖的提取工艺研究 总被引:1,自引:0,他引:1
对长梗黄精主根与须根多糖的提取工艺进行了研究.在对乙醇浓度、浸提温度、浸提时间和粉碎粒度等进行单因素试验的基础上,通过正交试验确定了长梗黄精主根与须根多糖提取的最佳工艺条件,即对长梗黄精主根多糖的提取最佳条件为乙醇浓度80%、浸提温度80℃、浸提时间50min、颗粒大小40目,此时多糖提取率为18.754%;而对长梗黄精须根多糖的提取最佳条件为乙醇浓度70%、浸提温度60℃、浸提时间30min、颗粒大小80目,此时多糖提取率为16.652%.须根多糖含量与主根含量差异性不显著,故须根的利用价值也很高,有待开发利用. 相似文献
8.
9.
利用超声波辅助提取柑桔皮中叶黄素的研究 总被引:1,自引:1,他引:0
在超声波作用下,使用不同溶剂,研究了柑桔皮中叶黄素的提取方法,并通过紫外线对其进行了表征研究。结果表明:以丙酮和无水乙醇混合液(1:1,V/V)为提取溶剂,料液比为1:20,超声波提取15min,是从柑桔皮中提取叶黄素的最佳技术工艺。 相似文献
10.
含硫化亚铁颗粒的乳化原油净化处理方法 总被引:4,自引:1,他引:4
采用超声波和离心法在室内进行了从被硫化亚铁颗粒污染的乳化原油中回收原油的试验,试验结果表明:超声波-离心-溶剂稀释-离心处理工艺中,超声波处理工序主要用于乳化原油中游离水和部分乳化水的脱除,以降低后续离心处理工序的负荷。用超声波-离心处理工序分离出的沉渣和油、水过渡层经溶剂稀释后进行第二次离心处理。两次离心处理中所得到的净化油混合可作为商品原油外输,第二次离心处理中分离出的沉渣和油、水过渡层经进一步除油后可作为固体废物处理。 相似文献
11.
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
12.
13.
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
14.
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
15.
16.
17.
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
18.
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
19.