桔梗皂甙V与去芹糖桔梗甙D的鉴定

目的：通过实验研究改进桔梗皂甙类成分的分离及鉴定方法,为桔梗质量标准的制定提供科学依据．方法：利用大孔吸附树脂脱糖脱色及薄层硅胶作柱层析介质,并首次利用电喷雾质谱技术结合理化分析对桔梗皂甙类成分进行分析鉴定．结果：两个单体化合物分别被鉴定为桔梗皂甙Ｖ和去芹糖桔梗皂甙Ｄ,结论：运用电喷雾质谱新技术,大大简化了皂甙类的结构鉴定过程．     

超临界CO2流体萃取技术对海州常山叶挥发性化学成分研究

采用超临界CO2流体萃取技术(SFE-CO2)提取了中药海州常山叶挥发油,通过气相色谱/质谱联用技术测定了提取物的化学成分.从中鉴定出32种化合物,主要包括2,6-二叔丁基-4-甲基苯酚,十八碳三烯醇、十八碳三烯酸酯、棕榈酸、芳樟醇、β-紫萝兰酮等.初步分析了所含成分的药效.结果显示,海州常山叶挥发油具有一定的药用价值.     

Volatile constituents in the flowers of Elsholtzia argyi and their variation： a possible utilization of plant resources after phytoremediation

Phytoremediation effectiveness and remediation costs are driving factors of this project. Full utilization of plant resources after their being used for phytoremediation is an unsolved problem. GC/MS technique was used to investigate the volatiles of the flowers from Elsholtzia argyi (PFE 1 : Purple Flower Elsholtzia) and their variation (WFE: White Flower Elsholtzia),naturally growing in Pb/Zn mined area, and Elsholtzia argyi (PFE2: Purple Flower Elsholtzia), naturally growing in Jiuxi uncontaminated agriculture soil. Seventeen compounds constituting 86.88% of total essential oils were identified in PFE1, with 2,6-octadienoic acid,3,7-dimethyl-methyl ester being the main constituent (63.30%). Sixteen compounds accounting for 95.32% of total essential oils were identified in WFE, with caryophyllene being the main component (55.02%). Compared to PFE1, PFE2 contained lower level of 2,6-octadienoic acid,3,7-dimethyl-methyl ester (31.76%), which was the main constituent in the total essential oils of PFE2. Caryophyllene is the main ingredient of flavor. Elsholtzia ketone was identified in all the three Elsholtzia plants. It can be concluded that the selected Elsholtzia argyi plants can be exploited on their versatile uses as fragrances and antiseptics due to the perfume ingredient and antibacterial components existing in their essential oils.     

动态顶空法分析烟草中的香味成分

文章采用动态顶空法直接将成品卷烟的烟丝置于旋转蒸发仪的圆底烧瓶中，水浴加热。用真空泵抽气，选择吸附剂将分离出来的香味成分吸附收集，经液体洗脱后浓缩，用气相色谱仪、气相色谱／质谱联用仪对烟草中的香味成分进行分析。该方法简单、快速，是烟草香味成分分离分析的一种较好的方法。     

在SQL SERVER7.0中创建数据库的三种方法

本文给出了创建数据库的三种方法，即利用MSSQLSERVER7．0的企业管理器和查询分析器以及利用ADO和DMO编程接口在VB下用命令代码来动态创建数据库的方法。     

中药黄藤的微波萃取和成分研究

首次采用微波萃取法、水蒸汽蒸馏法从中药黄藤的根茎中提取得到挥发油,并与文献中溶剂法提取得到的挥发油进行对比,通过气相色谱—质谱联用仪进行分析,并用面积归一法确定了各组分的相对百分含量．结果表明微波萃取法的选择性较好．     

三氯乙酰氯生产中副产物的检测和表征

三氯乙酰氯生产过程中,有一种对生产工艺有不良影响的副产物,通过对副产物进行气质的分析,解决了工艺中的实际问题,并用气质联用仪进行了表征.     

Science Letters： Proteomic analysis of the serum in patients with idiopathic pulmonary arterial hypertension

Idiopathic pulmonary arterial hypertension （IPAH） is a rare disease of unknown etiology. The exact pathogenesis of pulmonary arterial hypertension is still not well known. In the past decades, many protein molecules have been found to be involved in the development of IPAH. With proteomic techniques, profiling of human plasma proteome becomes more feasible in searching for disease-related markers. In present study, we showed the protein expression profiles of the serum of IPAH and healthy controls after depleting a few high-abundant proteins in serum. Thirteen spots had changed significantly in IPAH compared with healthy controls and were identified by LC-MS/MS. Alpha- 1-antitrypsin and vitronectin were down-regulated in IPAH and may be valuable candidates for further explorations of their roles in the development of IPAH.     

刺芫荽挥发性成分研究

以野生刺芫荽为原料,采用同时蒸馏萃取法提取其挥发性成分,应用气相色谱—质谱法对提取物进行化学成分分析.实验结果表明,野生刺芫荽提取物中共鉴定出24种化合物,占总峰面积的65.94％,质量分数达到1.00％以上的有6种物质,其挥发性成分中醛酮类化合物相对质量分数达到58.05％.     

Investigation of the materials found in the studio of Francis Bacon (1909–1992)

Abstract

The investigation of materials found in Bacon's studio is reported. The contents of the studio are examined and interpreted to identify the materials and colours most favoured by Bacon, and the range of media used. A small number of colours appear to have been heavily used. Some objects used as tools in the painting process are also investigated and explain textures seen in paint in his works. Samples of selected materials from the studio are analysed to identify the components of paints (pigments, extenders, and binders) used by Bacon. This investigation is part of a wider project examining his materials and techniques. The analytical information obtained here from the studio helps to clarify the statements made by Bacon in interviews regarding his use of materials and is proving useful in the identification of materials in his paintings, in order to help with the conservation and authentication of his works.