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化学分类

化学分类的相关文献在1956年到2022年内共计122篇,主要集中在植物学、中国医学、微生物学 等领域,其中期刊论文114篇、会议论文7篇、专利文献173258篇;相关期刊82种,包括天然产物研究与开发、微生物学报、植物分类与资源学报等; 相关会议7种,包括第七届全国成矿理论与找矿方法学术讨论会、2015年“海洋地质、矿山资源与环境”学术研讨会、2013年全国博士生学术论坛——中药资源系统研究与开发利用等;化学分类的相关文献由291位作者贡献,包括肖培根、周俊、阮继生等。

化学分类—发文量

期刊论文>

论文:114 占比:0.07%

会议论文>

论文:7 占比:0.00%

专利文献>

论文:173258 占比:99.93%

总计:173379篇

化学分类—发文趋势图

化学分类

-研究学者

  • 肖培根
  • 周俊
  • 阮继生
  • 刘启新
  • 刘志恒
  • 彭勇
  • 谭宁华
  • 严铸云
  • 任江波
  • 傅承新
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 林彩婷; 杨发福
    • 摘要: 我国是世界第一垃圾制造大国,根据中国城市环境卫生协会2017年数据,我国生活垃圾总量约为50亿~60亿吨,其中城市生活垃圾40亿吨,危险废物4000万吨,同时城市生活垃圾以每年5%~8%的速度在增长。垃圾是放错位置的资源,没有经过处理的垃圾直接被焚烧或者填埋甚至是随意的丢弃会造成极大的资源浪费以及严重的环境污染。垃圾分类是对垃圾进行有效处理的科学方法,但在我国真正做到垃圾分类的居民少之又少,设计并实施行之有效的垃圾分类政策已刻不容缓。
    • 白美娜; 江涛; 陈飞羽; 王朝晖; 江天久
    • 摘要: 于2013年5月到2014年6月,在大亚湾大鹏澳牡蛎区及邻近海域开展了为期14个月的采样调查,利用高效液相色谱(HPLC)法对表层水体中微微型浮游植物(0.7-2.7μm)光合色素进行测定,并应用色素化学分类软件CHEMTAX对自养微微型浮游生物(aototrophicpicoplankton,APP)功能类群进行分析.结果表明,该海域APP中共检出了15种光合色素,其中青绿藻素(Pras)和玉米黄素(Zea)是微微型色素中浓度最高的2种特征色素,均具有明显的季节变化特征:Pras主要出现在低温季节(牡蛎养殖期),而Zea主要出现在高温季节(非牡蛎养殖期).CHEMTAX分析表明,大鹏澳海域APP最主要的类群是硅藻、蓝藻和青绿藻,而甲藻、隐藻、定鞭金藻、绿藻和金藻生物量较低.温度和营养盐浓度是影响大鹏澳海域APP的时空分布的重要因素,青绿藻主要出现在低温季节(主要在冬季牡蛎养殖期间),且其生物量与溶解无机氮呈显著正相关;而蓝藻则主要出现在高温季节,与温度呈显著正相关.另外,贝类养殖也是能够影响APP空间分布的重要因素,在大鹏澳海域牡蛎养殖期间,青绿藻生物量在养殖区明显高于非养殖海域.
    • 郭思远; 马宝伟; 吴晓毅; 李佳; 高伟; 黄璐琦
    • 摘要: 目的:测定雷公藤属植物叶片中5种萜类成分的含量并比较差异,研究3个物种间的化学亲缘关系.方法:采用HPLC法测定28批雷公藤属植物叶片中雷公藤甲素、雷公藤内酯酮、雷酚新内酯、雷酚内酯和雷公藤红素5个成分的含量,并进行方差分析和聚类分析.结果:雷公藤属植物叶片中,雷公藤甲素、雷酚内酯和雷公藤红素的含量差异有统计学意义(P0.05).运用系统聚类将28批雷公藤属植物聚为4类:第I类为东北雷公藤和昆明山海棠;第II类为雷公藤;第III类为雷公藤;第IV类为雷公藤和昆明山海棠.结论:雷公藤属植物叶片中部分萜类成分含量差异明显.东北雷公藤与雷公藤化学亲缘关系较远;昆明山海棠混在2者之间,与2者无明显区分.%Objective:To study the relative relationship among the three species of Tripterygium genus by measuring the contents of 5 terpenoid compositions in plant leaves of Tripterygium genus and comparing the differences.Methods:HPLC was used to measure the 5 composition contents including Triptolide,Triptonide,Neotriptophenolide,Triptophenolide and Tripterine in 28 batches of plant leaves of Triptergium genus.ANOVA and cluster analysis were also performed to verify the results.Results:There were signif-icant differences among the contents of Triptolide,Triptophenolide and Tripterine in the plant leaves of Triptergium genus(P<0.05);There was no significant difference between Triptonide and Neotriptophenolide.Hierarchical clustering was used to divide the 28 batches of plants of Triptergium genus into 4 kinds:I:Tripterygium regelii Sprague et Takeda and Tripterygium hypoglaucum;II:Tripterygium;III:Tripterygium;IV:Tripterygium and Tripterygium hypoglaucum.Conclusion:The differences of some contents of terpenoid compositions in plant leaves of Tripterygium genus were significant.The relative relationship of Tripterygium regelii Sprague et Takeda and Tripterygium was distant;Tripterygium hypoglaucum was between the two,which had no significant differ-ence.
    • 刘建群; 刘健
    • 摘要: Objective:To study on the chemotaxonomy of Pteris by cluster analysis of pterosins. Methods:The HPLC-DAD method was established for the determination of the pterosins in five Pteris species. A cluster analysis of the characteristic pterosins was used for the chemotaxonomy of these Pteris species. Re-sults:59, 39, 3, 7 and 22 pterosins were identified by HPLC-DAD from Pteris cretica L. var. nervosa, Pteris semipinnata, Pteris insignis, Pteris vittata and Pteris multifida, respectively. Pteris cretica L. var. nervosa showed the highest amount of pterosins and Pteris insignis showed the lowest content of pterosins in five species. A cluster analysis of these species of Pteris indicated that they were divided into three groups:Pteris insignis, Pteris vittata and Pteris multifida were classified into groupⅠ, Pteris semipinnata in group Ⅱ, Pteris cretica L. var. nervosa in groupⅢ, respectively. Conclusion:The significant differ-ences between Pteris insignis, Pteris vittata, Pteris multifida with Pteris semipinnata were observed. The obtained results were in agreement with the traditional taxonomic study. The result indicted that the above method can be used to authenticate, classify and quality control Pteris species.%目的::研究凤尾蕨属5种药用植物蕨素类活性成分,为其质量评价、鉴定及亲缘关系研究提供依据,为凤尾蕨属植物化学分类深入研究奠定基础。方法:采用HPLC-DAD 测定5种药用植物的石油醚、乙酸乙酯、正丁醇和水部位的蕨素类成分。比较蕨素种类和含量差异,并以蕨素类特征成分及其含量为分类性状,采用聚类分析对凤尾蕨属药用植物进行化学分类研究。结果:从大叶井口边草、半边旗、全缘凤尾蕨、蜈蚣草和凤尾草中分别检测出蕨素类成分59、39、3、7和22个,总体来看大叶井口边中蕨素类成分含量最高,而全缘凤尾蕨中蕨素类成分含量最低。运用系统聚类将5种药用植物聚成3类:第Ⅰ类为全缘凤尾蕨、蜈蚣草和凤尾草;第Ⅱ类为半边旗;第Ⅲ类为大叶井口边草。结论:半边旗与全缘凤尾蕨、蜈蚣草和凤尾草之间的化学亲缘关系较远。蕨素聚类结果与传统分类结果有较好的一致性。蕨素类成分HPLC-DAD图谱可用于凤尾蕨属植物的鉴别和分类研究,并可为其质量评价提供重要参考。
    • 吴伟娜; 戴敏龙; 刘煜鹏; 阚辉
    • 摘要: 简要概述数据挖掘的基本概念、任务和常用的方法,分类介绍数据挖掘在中草药分析、化学研究、化工生产过程以及化学分类中的应用,最后进行总结并进行预测.
    • 骆晓
    • 摘要: 与石陨石和石铁陨石相比,陨铁质地较为致密,抗风化、侵蚀的能力强,不易碎裂,所以目前存世的较大陨石多为铁质。地球上现存的陨铁中,毫无争议的“老大”,是存于非洲纳米比亚的霍巴陨铁。这块陨铁的长和宽均为2.7米,高0.9米,估计质量为66吨。它的成分中84%是铁,16%是镍,还可以检测出钻元素,属于镍含量丰富的无纹陨铁,按化学分类则归类于IVB铁陨石。由于风化作用,表面的熔壳中有铁氢氧化物存在。这块陨铁的一个不寻常之处是有两个平坦的表面,这一特征可能导致它在进入大气层时,曾经打水漂般地在大气中弹跳。
    • 郭晓恒; 刘涛; 宋登敏; 雨田; 严铸云
    • 摘要: This study was aimed to analyze the volatile oil of Mentha crispata Schrad. ex Willd. in order to provide evidence for its chemotype and guidance for its production application. The chemical analysis was detected by headspace GC-MS. The results showed that 64 chemical compounds were detected. It was concluded that the volatile oil of M. crispata Schrad. ex Willd. mainly contained eucalyptol (35.58%), limonene (16.92%) and pinene (15.33%). It was concluded that the analysis on composition characteristics and main compounds of M. crispata Schrad. ex Willd. can provide evidences in its production application and chemotype.%目的:对皱叶薄荷精油进行成分分析,为种源鉴定提供化学分类依据并为生产应用提供指导。方法:采用顶空气相法对皱叶薄荷全草进行化学分析。结果:共得到64个化学成分,且皱叶薄荷主要由桉油素(Eucalyptol ,35.58%)、柠檬烯(Limonene ,16.92%)及蒎烯(Pinene ,15.33%)组成。结论:通过分析皱叶薄荷精油的组成特征及主要成分,可为其生产应用及种源鉴定提供化学分类佐证。
    • 石祥刚; 李成仁; 李凯凯; 叶创兴
    • 摘要: 利用高效液相色谱(HPLC)技术对24种1变种柃属植物28份样品的化学成分进行检测,并以各样品中色谱峰的相对保留时间对柃属植物的特征化学成分进行标记,最终统计到23个特征色谱峰用于化学分类研究。结果显示,柃属植物色谱峰在种内稳定出现,在种间则呈现多样性,可用于物种的鉴别。为进一步探讨种间亲缘关系及部分种的具体分类学地位,研究同时还采用UPGMA法和NJ法对色谱峰进行聚类分析,并根据两种聚类树型图讨论了化学成分的分类学意义。研究结果表明HPLC色谱技术具有快捷性、直观性和重现好的特点,可作为一种理想的标记用于柃属植物的分类鉴定。此外,本研究还能为柃属进一步的资源利用研究提供重要的参考。%Chemotaxonomic study of 25 taxa (24 species and 1 variety)of Eurya,in a total of 28 sam-ples were carried with high performance liquid chromatograms method.Twenty-three chemical compo-nents from the whole samples were recognized according to the relative retention time of the chromato-grams.The results showed that the chromatograms stabilized between same species and varied among dif-ferent species,which could be used to distinguish species from each other.In order to reveal the inter-specific relationships and the taxonomic positions of these species,chromatograms data were submitted to cluster analysis using UPGMA and NJ methods and then the taxonomic significance of chemical compo-nent in genus Eurya were discussed based on the two dendrograms.Our study showed that the HPLC chromatograms method was rapid,intuitive and repeatable,and it could be mentioned as a good marker to classify the plants of Eurya.In addition,this study also provided useful data for studying the resource utilization in the genus.
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