The chemical constituents from fruits and seeds of Ligustrum lucidum Ait.

【英文摘要】 The chemical constituents from fruits and seeds of Ligustrum lucidum Ait. were determined. The content of fatty oil in the seeds reached 14.70%. The main constituents of fatty acid were: oleic acid (44.37%), linoleic acid (40.378%), linolenic acid (0.867%),palmitic acid (4.525%),stearic acid (1.843%) etc,and the contents of unsaturated fatty acid reached 88.184%, the seed oil was of higher nutrient value. The contents of amino acids and mineral elements were relatively abundant. The content of total sugar...福建省教育委员会基金资助项目 (K20096 );福建省自然科学基金资助项目 (No C9910001

反相高效液相色谱分离分析蛋白质研究

反相高效液相色谱已广泛应用于有机物分析,在无机物分析方面也有不少应用。在反相色谱中C_(18)柱应用最多。如能研究扩大C_(18)的应用范围,则一台HPlC仪配用一支C_(18)柱,便可分析各式各样样品中的各种成分,最大限度发挥仪器的使用效率。国家自然科学基金课

Distribution and Seasonal Variations of Chromophoric Dissolved Organic Matter （CDOM） in the Bohai Sea and the North Yellow Sea

UV-Vis spectral data and a fluorescence excitation-emission matrix (EEM) was analyzed for the surface, middle, and bottom layer water samples from the Bohai Sea and North Yellow Sea in April, August, and December of 2016 and February of 2017. Distribution characteristics, influencing factors, and seasonal variation of CDOM in the study area were investigated. The results showed that the horizontal distributions of CDOM are similar in different seasons, showing a characteristic of high levels near shore and low levels in the offshore region. Strong correlations were observed between value a (355) and spectral slope S275-295, indicating that CDOM is significantly affected by land input. According to the vertical distribution, the CDOM level is the lowest in surface seawater in summer due to strong photo-degradation. In February, controlled by primary productivity, the lowest level of CDOM was found in the bottom seawater. From April 2016 to February 2017, the content of CDOM first increased and then decreased. Its concentration was highest in December. Seasonal variations are mainly controlled by land input and on-site production. According to analysis of the spectral slope S275-295, the average molecular weight of CDOM in winter was smallest in February, which was mainly related to the drastic reduction of land-based input at that time. The strong photo-degradation in summer resulted in a small average molecular weight of CDOM

Study on extraction technology of volatile oil from cortex phellodendri by supercritical carbon dioxide

使用超临界二氧化碳技术对经过超声-微波处理过的黄柏中的挥发油进行萃取,并对萃取工艺进行响应面优化。在单因素预实验的基础上,以萃取压力、萃取温度、萃取时间为响应因素,黄柏挥发油的萃取量为响应值,根据中心组合(bOX-bEHnkEn)实验设计原理,采用三因素三水平的响应面分析法,确定各工艺条件对萃取量的影响,并用扫描电子显微镜(SEM)对萃取前、未超声-微波处理超临界萃取后及超声-微波处理超临界萃取后的黄柏进行比较观察,对萃取效果进行了微观解释。结果表明,经过超声-微波处理过的黄柏中的挥发油超临界二氧化碳萃取最佳工艺条件为:萃取压力为34MPA,萃取温度为41℃,萃取时间为66MIn,萃取率达6.03%。The supercritical carbon dioxide extraction of volatile oil from processed cortex phellodendri was optimized by response surface methodology(RSM).According to the principle of Box-Behnken central composite design,extraction pressure,extraction temperature,extraction time were chosen as response factors,extraction mass was chosen as response value,and a three-factor and three level central composite design was adopted to determine the influence of various technological conditions.Using SEM observed the cortex phellodendri before and after extraction,and explained the extraction effects from microcosmic aspect.The results showed that the optimum extraction conditions were as follows:extraction pressure 34MPa,extraction temperature 41℃,extraction time 66min,extraction yield was 6.03%.湖南省科技厅重大专项(2008FJ1007);2010年吉首大学大学生研究性学习与创新性实验计划项目(JSU-CX-2010-49

引江济淮工程对派河水环境的影响

引江济淮工程是淮河流域水资源战略配置及巢湖和淮河水环境综合治理的重要措施,并列入国家加快推进的172项重大水利工程。引江济淮工程派河段是按照丰、枯水期严格设计的,派河水质不仅直接影响巢湖口的水质,还将间接影响淮河水质。结合派河现状水文、水质条件,采用明槽恒定均匀流公式预测了引江济淮工程对派河规划年水文情势的影响,预测结果表明:工程实施后,派河水位将升高1. 01～2. 32 mm,流速将增大0. 24～0. 33 m/s,流量将增大76～103 m3/s;采用一维稳态稀释、降解综合模型对工程实施后派河国控断面水质的变化进行预测,以枯、丰水期的污染物背景浓度值为基础,考虑了枯、丰水期输水方向的变化,水质预测结果表明工程实施后水质将有较大改善。国家科技重大专项水体污染控制与管理“清水廊道技术标准化与产业推广模式构建”(2017ZX07603-004-04

基于磁电复合材料的四态存储器

四态存储器是一种能够在一个存储单元内记录四种信息状态的新型存储器.采用磁电复合材料Co/PZT制作了一个四态存储器的存储单元原型,该存储单元的磁电输出信号随外磁场变化存在明显的滞回现象.根据磁电滞回现象,提出了施加偏置磁场的读取原理,实际测试结果给出了区别明显的15.8μV,?4.4μV,5.5μV,?11.3μV四种信号,初步演示了磁电复合材料用作四态存储器的可行性.国家自然科学基金(批准号:50571084); 国家高技术研究发展计划(编号:2006AA03Z101)资助项目

基于Ｍｅｔａ分析的神府榆采煤塌陷区植被变化研究

采煤塌陷是发生在井采矿区的一种严重的地质灾害。为了定量评估采煤塌陷对植被的影响，在收集有关神 府榆采煤塌陷区植被研究文献的基础上，采用Ｍｅｔａ方法对现有的２０多份研究结果进行了整合分析。结果表明：植 被盖度在塌陷发生初期有所下降，塌陷两年后又呈上升的趋势，并超过塌陷前水平。经塌陷干扰后，矿区主要优势种 有一些变化，一般而言，地表植物种数在塌陷发生１～２ａ后有一定程度的增加，且塌陷区新增的植物种多是以沙米 （Ａｇｒｉｏｐｈｙｌｌｕｍ ｓｑｕａｒｒｏｓｕｍ（Ｌｉｎｎ．）Ｍｏｑ．）、角蒿（Ｉｎｃａｒｖｉｌｌｅａ ｓｉｎｅｎｓｉｓ Ｌａｍ．）等为主的短命或类短命荒漠植物。塌陷 区植被变化特征展示了自然恢复在植被建设中的重要作用。神府榆矿区，以至黄土高原的生态建设需要采取自然修 复为主与人工修复相辅的方式整体推进。</p

重庆自然博物馆馆藏蝴蝶标本名录

在整理重庆自然博物馆保存的近3万件蝴蝶标本中,经过系统的分类鉴定,初步得出有国内蝴蝶标本521种221属12科,国外蝴蝶26种14属,台湾蝴蝶标本90种（亚种）53属10科。其中,还保存有蝴蝶正模标本1种,副模标本1种。馆藏保存最早的蝴蝶标本时间是从1910年开始,至今已有近100 a的历史

重庆自然博物馆馆藏两栖动物目录与区系分布

对重庆自然博物馆馆藏的两栖动物标本进行清点、整理得到自然博物馆馆藏两栖动物标本163种（亚种）,分属于2目,10科,46属。其中正模标本2种,副模标本1种,地模标本12种