十六大精神与青年的历史责任

十六大是我们党在新世纪召开的第一次全国代表大会,也是党开始实施第三步战略部署、全面建设小康社会的一次重要代表大会。这次大会是一次高举邓小平理论伟大旗帜、全面贯彻“三个代表”重要思想的大会,具有深远的历史意义和重大的现实意义。当代青年要认真学习十六大文件.全面理解十六大精神,勇敢地肩负起历史赋予的使命,增强6个观念,为实现中华民族的伟大复兴建功立业。     

Mitochondrial DNA sequencing of beetle larvae (Nitidulidae: Omosita) recovered from human bone

The isolation, amplification, and characterization of human DNA from hematophagous (blood feeding) and necrophagous (carrion feeding) arthropods have been advanced significantly by the development of polymerase chain reaction (PCR) DNA sequencing methodologies. Historically, DNA technology has been successfully utilized to identify individual hosts upon which species of hematophagous arthropods have fed. The analysis of hematophagous insects' gut content blood meals has led to major advances in medical entomology and vector-borne disease epidemiology. In the forensic arena, the ability to apply similar techniques to insects recovered from badly decomposed remains has been greatly enhanced through the advent of mitochondrial DNA (mtDNA) techniques. Mitochondrial DNA analyses have been utilized to identify both the human remains upon which fly larvae (maggots) have fed and the species of the larvae themselves. The preliminary work detailed here demonstrates, for the first time, the successful application of mtDNA sequencing techniques to the analysis of necrophagous beetle larvae. A small sample of sap beetle larvae, Omosita spp. (Coleoptera: Nitidulidae), was collected from human skeletal remains during anthropological examination and analyzed for human DNA using mtDNA sequencing. The beetle larvae yielded mtDNA matching that of the host human bone. The results detailed here further demonstrate the robust nature of human mtDNA and the ability to recover valuable mtDNA evidence from forensically important, late decompositional stage insect species.     

Sudden unexpected death in epilepsy: neuropathologic findings

Sudden unexpected death in epilepsy refers to sudden death of an individual with a clinical history of epilepsy, in whom a postmortem examination fails to uncover a gross anatomic, toxicologic, or environmental cause of death. Evidence of terminal seizure activity may not be present. One to two percent of natural deaths certified by the medicolegal death investigator are attributed to epilepsy. Detailed microscopic examination of the brain has increasingly afforded the identification of structural changes representative of epileptogenic foci. The authors present 70 cases of death attributed to sudden unexpected death in epilepsy. These cases were classified as follows: individuals who lacked a gross brain lesion, those who had a brain lesion demonstrable at autopsy, and those who lacked neuropathologic evaluation because of decomposition or because only an external examination was done. All of the subjects had a clinical history of seizures. The authors confirm that various microscopic findings, including neuronal clusters, increased perivascular oligodendroglia, gliosis, cystic gliotic lesions, decreased myelin, cerebellar Bergmann's gliosis, and folial atrophy, are present in a higher percentage of the brains of sudden unexpected death in epilepsy subjects than in the brains of age- and sex-matched control subjects.     

贵州经济文化类型的划分及其特点

按照经济文化类型的理论框架 ,贵州的经济文化类型在农耕经济文化类型组之下 ,表现为“山林刀耕火种”、“山地耕牧”和“丘陵稻作农耕”三种类型 ,其各个类型的空间分布和文化标示自成一体。千百年来 ,不同的经济文化类型在发展过程中 ,在完善自身的同时 ,也在不断发生更替或转型 ,它们共同丰富了贵州的农耕文化内涵