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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
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闫实 《国外农业环境保护》2013,(6):113-116
研究建立了蔬菜中农药多残留的快速检测QuEChERS-LC/MS/MS方法,优化了实验方案,样品以0.1%乙酸的乙腈(V/V)作为溶剂,Agilent Bond Elut提取试剂盒对样品进行1 min提取后,用C18和Agilent Bond Elut净化试剂盒净化。结果表明:7种农药的平均回收率为72%~127%,相对标准偏差为1.3%~16.3%,检出限为0.004~0.022 mg·kg^-1。该方法减少了溶剂用量,缩短了检测时间,每个样品溶剂用量仅为20 mL,每个样品的前处理费用大约为30元,一个实验人员每日可以处理50~60个蔬菜样品,真正实现农残的快速、简便、廉价、有效、灵敏、安全检测。 相似文献
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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
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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
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李力 《国外农业环境保护》2010,(4):79-82
从活性污泥中提取微生物群处理蓝藻废水,有效降低水中藻类含量,确定影响除藻效果的主要因素。通过直接向蓝藻废水中投加驯化、优化过的菌液以及单因素实验,表明在容器中按V菌液:V废水为5:1000的比例投加菌液处理5d,藻类生物量得到明显控制,水样叶绿素a、TN、TP及CODCr去除率分别达71.2%、82.2%、77.4%和80.1%。实验结果说明,有效微生物群对蓝藻废水中的蓝藻有很好的抑制作用。 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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燃煤二氧化硫控制技术应用概况 总被引:1,自引:0,他引:1
由燃煤引起的二氧化硫污染已成为大气环境中最主要的污染因子。为解决这个问题,我国结合国外的技术成果,进行了各种脱硫技术的研究。介绍了各种治理技术应用情况,并结合实际经验对其中应注意的问题给予评述。 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