我想邂逅一只獾

<正>当窗外猫头鹰的"咕咕"声和外公的呼噜声配成一首滑稽的奏鸣曲,我知道,夜已经很深了。穿好衣服,提上鞋子,我蹑手蹑脚地溜出家门。今晚,对,趁着夜深人静,我要独自走入森林,找到外公提到过的那棵老橡树。哪怕田鼠啃咬我的脚趾,虫虫钻进我的衣领,我都会在树下屏住呼吸,耐心守候,因为……     

魔鬼熊不是坏家伙

无聊的寒假,无聊的阿拉斯加,没有电子游戏,没有小伙伴,最讨厌的是……阿,阿嚏!这鬼天气简直要把人冻成冰棍。一下飞机,盖瑞就在心里一个劲儿地抱怨。为了写一本关于鹰的书,盖瑞的作家老妈带着他,哦不,应该是硬拽着他来到了偏远的阿拉斯加,美其名曰:在冰天雪地中亲近自然。     

森林捕狼计中计

爱尔兰多尼戈尔郡郊外,一座名叫贝利的宏伟庄园内。庄园主帕克先生站在巨大的落地玻璃窗前,用食指和大拇指轻轻捏着餐巾一角,优雅从容地抹掉嘴边的一丁点儿花生酱。我的庄园怎么样?尊敬的朱莉小姐!帕克转过身,对身边一位戴着鸟羽装饰帽,衣着华贵的漂亮女士说道。恕我直言,帕克先生。朱莉耸耸肩,您的庄园很美,有花草,有庭院,有骏马,有天鹅,但依我看,它太过柔美了。我听说,在都柏林,时髦的绅士们喜欢给自己的庄园加些野性力量。您知道,温克     

十二生肖(十二属种)动物与人类进化论——人类起源的探索(三)

地球上十二属种动物与人类的关系存在决定意识,人们的社会存在决定人们的社会(思想)意识。人类产生“十二兽”观念并制订,实行十二兽历法,正是人类自身起源于“十二兽”的先祖这一客观事实在人们头脑中的反映。十二兽:我国又称十二禽,十二属,十二物,十二生肖等。所谓十二兽,我国汉族是指鼠,牛,虎,兔,龙,蛇,马,羊,猴,鸡,狗,猪。让我们从十二兽历法的产生和起源来探讨地球上十二属种动物(十二兽)的先祖与人类进化的关系。世界上四大文明古国———中国、印度、埃及和巴比伦各有其“十二兽历法”,内容上大同小异。中国汉族:鼠,牛,虎,兔,龙,蛇,…     

广西容县84例狂犬病流行病学分析及预防对策

目的 通过对容县2000～2007年84例狂犬病流行病学特点进行分析,探讨流行回升的因素,分析目前防治过程中存在的问题,提出狂犬病的预防对策和措施.方法 收集2000～2007年容县狂犬病疫情报告资料及对狂犬病病例的个案调查资料进行分析.结果 近年来,容县狂犬病疫情明显上升,成为有史以来流行高峰,最高年发病率3.04/10万.发病以农民,学生为主,男性多于女性,全年均有病例发生,无明显季节性,狂犬病暴露动物以犬伤为主,暴露部位以头颈部为最危险,潜伏期最短.结论 为有效预防狂犬病流行,应进一步建立完善犬类的管理的法律、法规,使预防狂犬病进入法制轨道,以有效控制狂犬病流行.伤后未能及时正确处理,暴露后免疫率低,是狂犬病发生的重要原因.加强宣传,提高狂犬病的防控知识,政府部门齐抓共管,采取综合性防控措施,才能有效控制狂犬病的流行.     

生物柴油植物桉树类叶油的开发利用

按树是我国南方地区常见的常绿树种,我们经过较长时间的调研和资料整理,认为桉树类的枝叶油与柴油的理化性质十分接近,是非常好的内燃机燃料油的代用品。而且,蒸馏按树油与绿化荒山、培育用材林矛盾不大,建设按树油基地不仅可以解决燃料油的短缺,也可培植用材林,带动地方经济的发展,增加农民收入,是一举多得的事业。     

聆听草语

出小小的村落,一直往南走,有一片辽阔的草地。任那向阳的坡坝上,长着墨绿色的草儿们。浓浓的,密密的,人丁旺盛,不像园圃那么单调。蒲公英、野艾、沙拉秧、芨芨草、酢浆草、抽筋草、马齿苋、野羊姜……这些草常常迷幻了我的心与眼。我分不清它们的性别,更不甚清楚它们归属哪个"门派"。眼熟的几个叫着名字,剩下的含混着打个招呼,像人群中那些混个脸熟却不知名姓的人一样。在尘世间活得飞扬跋扈时,我去看草。它们平凡地生活着,宽容,谦让,和平友爱的样子,没有专制,也不自以为     

苏联猛犸象的研究

猛犸象(Elephas primigenius)是最著名的动物化石之一。在欧洲,西伯利亚,中国北部以及其他区域内的许多地方,都曾发现过大批这种动物的遗体,而且它们的庞大的躯体与奇特的形状早就吸引了人们的注意。此外,在亚洲及欧洲的冻土带内,曾发现过这种动物的,连皮,肉和毛都保存着的完整的尸体。古代极北地区的居民,当他们发现了这些由于海岸崩裂而从地下深处露出来的尸体后,曾企图寻求关于这些奇怪动物的外貌的解释。在耶库     

象鼩吉森遇上偷窥狂

在非洲的坦桑尼亚北部,有一片茂密的森林,名叫丹堵鲁。为了追踪一种名叫岩象鼩的小动物,生物学家格蕾丝已经在这片森林里待了几个星期。此刻的她,双膝跪地、鼻尖儿蹭着泥,正聚精会神地调试着微型摄影机。哈,调试完毕,我简直是天才!格蕾丝咧开嘴巴,得意地咯咯笑着,这下我一定能……哎呦,什么什么东西钻进了我的鼻子,痒、痒,啊——阿嚏!     

为迎接祖国更美好的春天而欢呼

全国人民以万分兴奋愉快的心情,从一个胜利走到另一个胜利地渡过了1952年。经过“三反”,“五反”运动的洗錬,受了上甘岭辉煌胜利的鼓舞,人们怀著更坚强的信念来迎接新的1953年。这一年给我们提出了三项伟大的任务:第一,继续加强抗美援朝的斗争,争取更大的胜利;第二,开始执行国家建设的第一个五年计划,完成和超额完成1953年度建设计划;第三,召集全国人民代表大会,公布宪法,通过国家建设计划。面对著这伟大1953年新时期的来临,就生物学工作者与生物学教师来讲,应当作著怎样的准备,如何计划在各人的工作上与这些任务相配合,以求更高度地与更有效地发挥所有的力量来建设祖国,是我们应首先加以考虑的问题。     

Recent advances in the study of Kaposi's sarcoma-associated herpesvirus replication and pathogenesis

It has now been over twenty years since a novel herpesviral genome was identified in Kaposi's sarcoma biopsies. Since then, the cumulative research effort by molecular biologists, virologists, clinicians, and epidemiologists alike has led to the extensive characterization of this tumor virus, Kaposi's sarcoma-associated herpesvirus(KSHV; also known as human herpesvirus 8(HHV-8)), and its associated diseases. Here we review the current knowledge of KSHV biology and pathogenesis, with a particular emphasis on new and exciting advances in the field of epigenetics. We also discuss the development and practicality of various cell culture and animal model systems to study KSHV replication and pathogenesis.     

The structure, reproduction and taxonomy of Vidalia and Osmundaria (Rhodophyta, Rhodomelaceae)

Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera.     

New or rare chromosome counts in Artemisia L. (Asteraceae, Anthemideae) and related genera from Kazakhstan

Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted.     

肝癌中HBV和HCV基因和抗原的分布及意义

采用原位分子杂交方法检测HCV RNA及HBV X基因;采用免疫组织化学方法研究HCV核心抗原,非结构区C33c抗原及HBxAg在肝细胞肝癌中的定位及分布.结果表明(1)HCV RNA、HBV X基因在肝细胞肝癌组织检出率分别为40%(55/136)和82%(112/136).HCV RNA定位于癌细胞的胞浆内,阳性细胞呈散在、灶状及弥漫分布三种形式;HBV X基因在肝癌细胞中的分布呈胞浆型、核型及核浆型,阳性细胞也呈上述三种分布形式;(2)HCV C33c抗原、核心抗原在肝细胞肝癌中的阳性率为81%(133/164)及86%(141/164).C33c抗原定位于癌细胞及肝细胞的胞浆内;核心抗原既定位于癌细胞核中,又可定位于胞浆中.C33c抗原阳性细胞以灶状分布为主;而核心抗原阳性细     

Selection with two alleles and complete dominance

For a plant selection model with frequency-independent viabilities, fertilities and selfing rates, it is shown that apart from global fixation, for certain parameter combinations a protected polymorphism and facultative fixation (either allele may become fixed according to initial frequencies) may both occur. Facultative fixation requires different selling rates for the dominant and recessive type. Protection of the polymorphism requires resource allocation for male and female function. In this connection the problem of purely genetically caused population extinction is discussed.
For general frequency dependence and regular segregation, the chances for establishment of a completely recessive gene are compared to those of a completely dominant gene. It is proven that the process of establishment of the recessive gene, despite a fitness advantage, may be considerably endangered by drift effects if random mating prevails. The recessive gene may reach the same effectivity in establishment as a dominant gene, only if the recessive homozygote mates exclusively with its own type during the period of establishment.