绿萼梅药材超高效液相色谱指纹图谱研究

目的 采用超高效液相色谱法（ultra performance liquid chromatography，UPLC）建立绿萼梅药材的指纹图谱，为有效控制绿萼梅药材的质量奠定基础。方法 采用CORTECS C18色谱柱（2.1 mm×100 mm，1.6 μm），以乙腈（A）-0.1%甲酸水（B）溶液为流动相进行梯度洗脱，进样量为1 μL，流速为0.3 mL/min，检测波长260 nm。结果 通过相似度分析确定19个色谱峰构成绿萼梅药材指纹图谱的特征峰。结论 采用UPLC方法建立的指纹图谱具有精密度、稳定性、重复性良好的特点，可为绿萼梅化学成分的进一步提取分离和药效物质基础的研究提供科学依据。     

Identification of furosemide in hair in a post‐mortem case by UHPLC‐MS/MS with guidance on interpretation

Testing for drugs in hair raises several difficulties. Among them is the interpretation of the final concentration(s). In a post‐mortem case, analyses revealed the presence of furosemide (12 ng/mL) in femoral blood, although it was not part of the victim's treatment. The prosecutor requested our laboratory to undertake an additional analysis in hair to obtain information about the use of furosemide. A specific method was therefore developed and validated to identify and quantify furosemide in hair by UHPLC‐MS/MS. After decontamination of 30 mg of hair, incubation in acidic condition, extraction with ethyl acetate, the samples were analyzed by UHPLC‐MS/MS. Furosemide was found in the victim's hair at 225 pg/mg. However, it was not possible to interpret this concentration due to the absence of data in the literature. Therefore, the authors performed a controlled study in two parts. In order to establish the basis of interpretation, several volunteers were tested (four after a single 20 mg administration and twenty‐four under daily treatment). The first part indicated that a single dose is not detectable in hair using our method. The second part demonstrated concentrations ranging from 5 to 1110 pg/mg with no correlation between dosage and hair concentrations. The decedent's hair result was interpreted as repeated exposures. In the case of furosemide analysis, hair can provide information about its presence but cannot give information about dosage or frequency of use.     

Transnational policy networks and the European Union's energy policy

The goal of this article is to critically examine the engagement between the European Union (EU) and a transnational policy network (TPN) that deals with an issue that has grown in importance in the architecture of the EU's energy policy: fracking. The author argues that successful engagement between the EU and networks on shale gas was facilitated by the fact that the TPN or the members of the TPN were in possession of technical and scientific information that is highly needed by institutions in Brussels. Also, the article reveals that the fact that EU energy insecurity has been high on the EU agenda increased EU's interest in actors that could provide vital insights into potential panaceas and palliatives to energy insecurity.     

Analysis of thin-layer chromatograms of paint pigments and dyes by direct microspectrophotometry

The Nanospec 10S microspectrophotometer has been used to produce reflectance spectra over the 380–900 nm range from coloured thin-layer chromatography spots. The method has been applied to extracted paint pigments and to dyes from other materials examined in forensic science.     

开发金属纤维燃烧器——提高天然气应用技术

阐述了我国天然气的发展概况,提出为迎接来自四面八方的天然气,必须具备各种行业的先进燃气应用技术,并且根据目前我国情况,强调提高天然气应用技术的迫切性.同时介绍了国外一种新型金属纤维燃烧器的优越特性.     

生物检材中的液化石油气成分的土顶空GC/MS分析

目的 建立测定人血中液化石油气(LPG)主要成分的定性定量方法。方法 将LPG添加到血中,用综合质谱图及保留时间定性、单离子法定量分析。结果LPG的7种主要成分血中最小检出限为12.8～31.3ng;仪器最小测量限为1.02～3.36ng。结论 土顶空-GC/MS法测定人血中LPG,简便、快速、准确,适用于LPG成分的检测。     

液化石油气与煤气中毒检验的异同

目的 研究液化石油气与煤气中毒鉴定的异同。方法 将实验小白鼠、SD大鼠及家兔分别经液化石油气和煤气染毒,测定中毒后血中碳氧血红蛋白饱和度(HbCO%)及丙烷。结果 煤气中毒家兔体内碳氧血红蛋白饱和度达及49.95%;煤气中毒死亡小白鼠及大鼠体内HbCO%大于60%;液化石油气中毒死亡的家兔、小白鼠及大鼠血中检出丙烷,而体内HbCO%与正常的家兔、小白鼠及大鼠体内HbCO%无明显差异。结论 煤气中毒可通过测定其体内HbCO%进行鉴定;液化石油气中毒后体内HbCO%未见明显升高,可通过测定血中丙烷进行鉴定。     

黑龙江省与俄远东石油天然气合作升级研究

黑龙江省与俄罗斯远东的资源结构具有明显的互补性。因此,应将开发和利用俄远东的自然资源作为与俄投资合作的优先方向。从21世纪起俄罗斯远东油气资源的开发规模将扩大,速度将提升。黑龙江省应抢抓有利时机,充分利用地缘优势,加大力度推进与俄远东地区合作开发和利用油气资源。     

燃气加气站地下储罐的置换和试压方法的探讨

介绍了汽车用燃气加气站地下储罐的置换和试压方法 ,对地下储罐系统试压方法的经济性进行了分析     

西伯利亚天然气工业的发展前景

俄罗斯天然气的储量和开采量均占世界第一位。天然气工业是俄罗斯燃料动力工业中发展最快的部门。西伯利亚地区是俄罗斯主要的天然气产区。这里的天然气不仅储量大,而且质量高,是俄实现与亚太地区国家能源合作的重要基础。天然气工业集团是西伯利亚地区天然气资源国际合作的主要运作者,依靠控股公司实现对西伯利亚地区天然气资源的勘探、开采及运输。