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响应面法优化棘托竹荪孢子多糖提取工艺及抗氧化活性研究 被引量:6
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作者 林陈强 陈济琛 +2 位作者 林新坚 陈克华 林戎斌 《食品工业科技》 CAS 北大核心 2020年第9期161-167,共7页
为了最大限度地从竹荪孢子中提取多糖,且不破坏多糖的抗氧化活性,本文考察提取时间、提取温度、料液比、pH等因素对多糖得率及多糖活性的影响,在单因素实验的基础上,采用响应面法Box-Benhnken设计,优化棘托竹荪孢子多糖提取工艺。结果表... 为了最大限度地从竹荪孢子中提取多糖,且不破坏多糖的抗氧化活性,本文考察提取时间、提取温度、料液比、pH等因素对多糖得率及多糖活性的影响,在单因素实验的基础上,采用响应面法Box-Benhnken设计,优化棘托竹荪孢子多糖提取工艺。结果表明:综合提取效率和多糖活性等因素,得到竹荪孢子多糖提取的最适工艺参数为提取温度70℃、提取时间120 min、pH9、料液比为1∶20。采用上述最优工艺条件进行多糖提取的实验,测得实际多糖得率为9.87%,在2~10 mg/mL范围内,孢子多糖对羟基自由基清除率的IC 50为4.67 mg/mL。实验结果为下一步分离、纯化及鉴定竹荪孢子活性多糖提供基础和依据。 展开更多
关键词 竹荪孢子 多糖 抗氧化性活性 响应面法
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Application of Electron Microscopic on the Sources of PM_(10) in the Atmosphere
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作者 WANG Ju YANG Meng-yao +3 位作者 WEI Qiang FANG Chun-sheng chen ke-hua XIAO Zhong-shen 《Meteorological and Environmental Research》 CAS 2012年第1期8-13,共6页
[ Objective] The aim was to study the application of scanning electron microscopy(SEM) on the physical property and ideological distri- bution of partials. [ Method] By dint of scanning electron microscopy, the morp... [ Objective] The aim was to study the application of scanning electron microscopy(SEM) on the physical property and ideological distri- bution of partials. [ Method] By dint of scanning electron microscopy, the morphological property of each source and main elements were analyzed. Compared with morphological property of sampling point, the source of particles was determined. [ Result] The results were consistent with the analysis of CMB8.2 chemical mass balance receptor model. Taking the four detection stations in Longyan Normal Training College, Minxi Vocational & Technical College, Longyan University, and Longyan Environment Monitoring Station as examples, the major air pollutants respectively were soil sand, dust of burning coal, second fugitive dust; soil sand, second fugitive dust, vehicle exhausts; second fugitive dust, soil; and second fugitive dust, vehicle exhausts, dust of burning coal. [ Conclusion] The study result had certain guiding significance to the analysis of sources of particles in the atmosphere and atmosphere environment treatment. 展开更多
关键词 PM10 Scanning electron microscopy X-ray energy dispersive spectrum CMB receptor model China
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