Tomb With a View

正China's famed Terracotta Warriors conquer the Big Apple A600-pound armored general from China has invaded New York City.He has come in peace,along with a few warriors of his army,some livestock,a horse,kitchen supplies and even an acrobat.Nearby,a kneeling archer practices his aim,with a spray of arrows fanning out on the wall ahead.The entourage seems appropriate,since it is the 2,200-year-old general's first     

Use of pepper spray in policing: retrospective study of situational characteristics and implications for violent situations

Pepper spray (OC) is a policing tool aimed to prevent or stop aggressive behavior by quickly and temporarily incapacitate without injuring. To date, few studies have investigated OC’s operational usefulness and limitations. OC reduced violent behavior in 93% of the 936 incidents investigated. However, the operative range was often <2 m and it took between 3 and 5 s of spraying before obtaining effect, partly owing to the difficulties of hitting a small, sometimes erratically moving target. Collateral hits were noted in 24% of the incidents, whereof 90% were other officers. Noteworthy, in 21% of incidents officers put themselves at large personal risk by using OC at close range against people armed with lethal weapons. Hence, OC emerges as a suitable tool for handling low threat situations but lacks key traits to ensure safe and efficient policing of high threat situations, e.g., handling armed assailants.     

Recovery of Spray Paint Traces from Clothing by Beating

Manual recovery of spray paints from textiles using a microscope, the routine method in many laboratories, is often laborious. Beating the clothing with a plastic rod, the routine method used for recovery of glass traces within the authors’ laboratory, is proposed as an alternative. The efficiency of the method was evaluated by spray tests with fluorescent paint. In these tests, paint particles in the acquired debris samples, as well as those remaining on the textiles, were investigated. The results show that beating is an efficient way to recover and concentrate paint particles. A good efficiency for jeans fabric and rough knitwear is reported. The results appeared to be less satisfactory for smooth woven fabric. Application of the method in casework was effective for graffiti paints as well as for flaked car paint.     

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水溶性壳聚糖的制备及其在化妆品中的应用

用一氯乙酸对壳聚糖进行了化学改性,将酸溶性壳聚糖转变为水溶性羧甲基壳聚糖,并对其理化性质(如取代度、特性粘度、吸湿性和保湿性等)进行了测定。结果表明,羧甲基壳聚糖具有良好的水溶性,应用在啫喱水方面具有良好的吸湿性、保湿性以及定型、护发作用。     

纸喷雾质谱在物证检验中的应用

物证检验中,建立简便、快捷、样品前处理步骤少的质谱分析方法一直是一大挑战。纸喷雾电离技术具有快速灵敏、经济高效、操作简便的特点,可有效解决物证检验中的难题。本文综述了纸喷雾电离质谱在物证检验领域相关应用的最新进展,主要包括毒物毒品分析、药物滥用、农残检测、食品及日用品安全、文书检验及爆炸物检测,并辅以展望。     

健脑精喷雾剂治疗老年期痴呆的临床研究

目的：探讨健脑精喷雾剂对老年期痴呆的治疗作用。方法：５６例老年期痴呆患者随机分为两组。治疗组３５例，采用健脑精喷雾剂治疗８周，观察治疗前后临床症状积分值、嗅觉改变、血液流变性等，并采用都可喜治疗作为对照组（２１例）。结果：治疗组主要症状明显改善（Ｐ〈０．０５），总有效率为８９％，显著高于对照组（３８％）。此外，治疗组嗅觉障碍和血液流变性指标也有一定改善。结论：健脑精喷雾剂可能通过多途径增进老年期痴