执政智慧：甘洛矿业整治的启示

四川甘洛矿业秩序整顿,不仅使非法开采得以停止,而且还探索 出了采矿权的招标拍卖挂牌新机制。甘洛10宗矿权实际拍卖价高达 53510万元,是起拍价的6．3倍,相当于该县2003年地方财政收入的 12倍。甘洛矿业整顿工作督导组能在较短时间内割掉寄生20多年 的“毒瘤”,建立起市场配置资源的全新机制,对执政者而言,不仅是 对执行力的一次考验,更是对执政智慧的全面检验。     

如何讲解“资本主义生产关系的萌芽”

《社会发展简史》上册的最后一个框题是“资本主义生产关系的萌芽”。其教学目的是使学生了解由于生产力的发展,在封建社会末期,在商品经济的基础上出现了资本主义生产关系的萌芽,资本主义制度必将取代封建制度。这一框很重要,是封建社会和资本主义社会的“接合     

八十年代经互会国家初级能源的供给情况(摘译)

一、引言经互会国家今后将如何保障它们的能源供应,这个问题在东欧集团内部和外部均引起越来越多的关注和讨论。总的来看,迄今为止,经互会国家在能源提供方面还是可以自给自足的。现在的问题是,这样的局面是否还能继续保持下去,因为在以往几年中初级能源的生产是不能令人满意的。由于东欧越来越依靠苏联向它们提供初级能源,所以,特别值得研究的     

应用高压液相色谱(HPLC)鉴定胎儿血痕

<正> 本文介绍了一种应用反相高压液相色谱法鉴定胎儿血红蛋白(Hb-F)的新方法。胎儿血痕与成人的区别在于存在由标志着Hb-F的γ链新产生的峰。色谱中成人血痕几乎测不到γ链。而且这种方法可以通过测定珠蛋白链在色谱中的组成来铡定Hb-F的含量,它以全部Hb     

印度尼西亚与美国的经济衰退

(一)印度尼西亚在目前世界经济中的地位1.改变殖民主义经济为民族经济.印度尼西亚的经济,在目前世界经济中的地位,是由印度尼西亚经济结构本身所決定的.当前印度尼西亚的经济结构,仍然是殖民主义性质的经济结构,这是执政阶层和社会广大阶层所熟知的.这些阶层,对于改变殖民主义经济为民族经济的问题,不仅在方法上各不相同,以至彼此相互对立,而且对民族经济概     

Use of diagonal teeth measurements in predicting gender in a Turkish population

Mesiodistal and buccolingual measurements, commonly used as a means of sex determination from teeth, can sometimes cause difficulties. The aim of this study is to test whether diagonal measurements can make it possible to take more accurate measurements. The results of diagonal measurements of dental casts taken from 30 males and 30 females have been evaluated by discriminant function statistics. Intra- and interobserver error tests did not indicate any statistically significant differences between the findings of two observers. Seven of the 14 measurements on the maxilla and 10 of the 14 measurements on the mandible have been found to be significantly greater in males. According to the results of the stepwise discriminant function statistics, the most contributory measurements to the function were upper first incisor mesiobuccal-distolingual (MBDL) and distobuccal-mesiolingual, lower second incisor MBDL, and lower canine MBDL. The highest reliability was obtained in MBDL measurements. It was realized that diagonal measurements of teeth, especially of canines, revealed clear dimorphic differences. Classification accuracy was found to be 83.3% for total sample, 78.3 for upper jaw, and 85.0% for the lower jaw. Accuracy rate was higher in the lower teeth. Commonly seen orthodontic anomalies, such as tooth rotations, crowding, attritions, deep dentin-enamel junction defects, and certain types of fillings, could make it difficult to correctly take width measurements or could cause other mistakes to occur. This explains the reason why this research has been considered to be of some use in diagonal measurements, which is an accurate method, particularly when employed for the front teeth.     

Alpha-amylase kinetic test in bodily single and mixed stains

Recently, in Italy, a murder and a putative sexual violence was accomplished on a child. A bodily fluids mixture on the child's underwear between the victim (female) and the suspect (male) was ascertained by short tandem repeat (STR) DNA typing and, due to the absence of seminal fluid, saliva from the suspect and urine from the child was hypothesized. In order to investigate the possibility of specifically and rapidly detecting saliva stains both alone and mixed with other bodily fluids, we used a quantitative spectrophotometric technique, named Amylase test, for the detection of alpha-amylases. We determined alpha-amylase activity and reaction kinetic curves in several samples collected from the child's underwear. In order to confirm our intuition, we first tested saliva, perspiration, and urine, singularly and in mixtures; second, several forensic stains including saliva, perspiration, urine stains, saliva/perspiration, and saliva/urine mixture stains were tested. Evaluating alpha-amylase activity values and time-course curves' behavior of alpha-amylase reactions we were able to recognize successfully, in all cases, the presence of saliva and to distinguish it specifically from other bodily fluids containing alpha-amylase. A further confirmation of our result was provided by STR DNA typing on several areas of the underwear: a clear correlation between alpha-amylases activity and male DNA was detected on all the samples evaluated.     

Pink teeth in a series of bodies recovered from a single shipwreck

Pink teeth have most often been observed in victims of drowning but have also been reported in subjects who died suddenly and unnaturally. There is general agreement that there is no obvious connection between the occurrence of pink teeth and the cause of death, but the condition of the surroundings (especially humidity) must certainly play an important role in the development of the pink-tooth phenomenon. The frequency and distribution of postmortem pink coloration of the teeth have been studied among a representative sample of 52 cadavers. All the bodies were victims of a single shipwreck that occurred on March 13, 1997, in the middle of the Otranto Canal (Mediterranean Sea). The bodies were recovered from the seawater after approximately 7 months. A distinct pink coloration of the teeth was found in only 18 cadavers (13 females and 5 males) of ages ranging between 13 and 60 years. The phenomenon was more pronounced in younger individuals due to age-related changes of the root canal, less penetrable by the pigment responsible for the postmortem pink staining. By histochemical methods and autofluorescence, hemoglobin and its derivatives have been identified as the most likely pigments responsible for this postmortem process that can be considered analogous to postmortem lividity. These data are consistent with previous reports on pink teeth, indicating that the diffusion of the blood in the pulp into the dentinal tubules causes the red discoloration of the teeth. Based on the results, the pigmentation is more prominent on the teeth with single roots rather than in the posterior teeth with multiple roots.