Examination of a "velasco" signature on an oil painting

In September 2003, an investor bought an oil painting at auction in Denmark. The painting was signed "José Maria Velasco." The investor attempted to sell the painting in the United States, but found that he needed confirmation that this was an authentic Velasco painting. The provenance of the painting was questionable because it came to Europe from Cuba without appropriate documentation including the date of its entry into the European market. If the signature was determined to be authentic, the painting would have an approximate value of 1 million dollars. Initial research on the life and works of the artist and a literature review resulted in the preparation of an "Art Worksheet." Known signature specimens were obtained from reputable sources. A comparison of the known signatures with the questioned signature concluded the questioned signature was very probably not executed by José Maria Velasco.     

Chinese interest in Nigeria's oil and the American context

Nigeria is an emerging strategic partner of China. This may at first glance appear to have some important implications for the United States, which has long seen Nigeria as a significant player in the region and has often cast Nigeria as an ally of some import on the continent. However, when examining Sino–Nigerian ties in the context of the United States, the hyperbole about China's role needs to be tamed. Washington, DC does not seem overly concerned by China's rising influence in the country. Though US ties with Abuja are robust, its economic interest in Nigeria is declining and is not threatened by Chinese activities.     

油脂物证的荧光分析方法

为建立一种简便、灵敏、准确的油脂物证鉴别方法。采用文检仪对42种市售车用润滑油样品的荧光特性进行了研究。根据不同激发光照射下样品的荧光颜色和强弱不同,可将42种样品区分为XXIII类。验结果表明：该方法具有简单、快速、直观、高效等特点,为油脂物证的检验提供了一种新的技术。     

The Analysis of Gun‐Cleaning Oil as Long‐Distance Gunshot Residue and Its Implications for Chemical Tags on Bullets

Using a BB gun, it was shown that a gun‐cleaning oil (GCO) can be wiped from the barrel by a projectile and carried much longer distances than those usually associated with solid gunshot residue (GSR). Analysis of GCO subsequently deposited on a target was performed using pentane extraction and gas chromatography. (Hoppe's GCO was used here as a model.) When a 0.45 caliber handgun was used, analysis reveals that most of the GCO wiped from the barrel does not survive, owing to the elevated temperatures encountered. However, two components of the GCO, a long‐chain fatty acid and its ethyl ester, do survive and can be detected in the bullet wipe. This suggests that GCO may be considered as GSR, uniquely detectable at long distances, and that other chemical compounds could either be added to a GCO or directly to bullets, to serve as identifying chemical tags.     

浅析钻井平台油污损害赔偿立法的完善——由渤海湾溢油事故引发的思考

发生在2011年的渤海湾溢油事故,暴露出我国油污损害赔偿制度的严重缺陷。本文在分析国际公约、国内立法及钻井平台法律属性的基础上,对钻井平台油污损害赔偿的立法完善提出建议：在立法形式上,应修改《海洋环境保护法》,在其确立的框架下制定具体规范钻井平台和船舶油污损害赔偿问题的《油污法》;在制度内容上,应加大行政处罚力度,建立强制责任保险制度和损害赔偿基金制度,并通过保障受害者的知情权等为其民事求偿提供支持。     

我国海上溢油事故海洋环境损害赔偿法律问题研究——以船舶溢油事故为视角

海上石油开发及油轮运输中发生的事故都会对海洋环境造成损害。以船舶溢油事故为例,中国海洋环境损害赔偿面临＂海洋生态损害＂概念模糊、损害赔偿难以量化、国家行政主管部门索赔存在交叉等困境。传统侵权法理论无法确定海洋环境损害的范围,更无法将海洋环境损害进行量化。尽管有关船舶溢油海洋环境损害赔偿法律体系的发展在一定程度上缓解了侵权法无法解决的难题,但仍需完善现有的法律制度,以期有效、及时地赔偿海洋环境损害。     

Short run and long run effects of the world crude oil prices on the Malaysian natural rubber and palm oil export prices

With regard to the increasing in world crude oil prices, it is time to examine more carefully the claim that the increase in world crude oil prices tends to increase commodity prices. Hence, we examine the major commodity prices in Malaysia namely palm oil prices and natural rubber prices. We will analyse the relationship of both commodities＇ prices with world crude oil prices using the autoregressive distribution lag （ARDL） approach. Besides the analysis of bound testing approaches to see the level of relationships, short run and long run effects also are carried out in order to investigate which period has been significantly effected by the increase of world crude oil prices. The result reveals that long run relationship between world crude oil prices and both commodities prices exists.     

混和硅油测定玻璃折射率

目的建立混合硅油测定单纯用B油和C油无法测定的玻璃折射率的方法。方法将B油和C油分别按1:2和2:3的体积比配成两种混合硅油,用此两种混合硅油测定同一块玻璃的折射率。结果用此两种硅油测得的玻璃的折射率结果无显著性差异。该方法克服了玻璃折射率仪温度范围窄(25℃～125℃)的缺点。     

传统硫熏加工与现代微波加工滁菊质量比较

目的 通过对硫熏加工滁菊和微波加工滁菊中主要化学成分进行比较,为滁菊的合理加工方法提供依据.方法 以挥发油、总黄酮、绿原酸及二氧化硫残留量为检测指标,对两种方法加工的滁菊的主要化学成分进行比较分析.结果 硫熏滁菊中挥发油、绿原酸含量均高于微波滁菊;硫熏滁菊中总黄酮的含量略低于微波滁菊;硫熏滁菊的薄层色谱斑点数与微波滁菊...     

川芎嗪口服油包油微乳的研制及大鼠体内药物代谢动力学研究

目的 制备川芎嗪口服油包油(oil/oil, O/O)微乳,提高川芎嗪口服生物利用度.方法 在本课题组前期对O/O型非水微乳所做的共性构建的基础上,将川芎嗪制成川芎嗪O/O型口服微乳制剂,研究其在大鼠体内的药物代谢动力学特点.结果制备的川芎嗪O/O型口服微乳平均粒径为48.2 nm,基本成球形,大小分布较为均匀;川芎嗪...