生物信息学中途径研究进展

叙述了生物信息学中途径的研究背景;综述了近几年来相关途径及生物化学数据库及其特点;介绍了有关的途径分析方法.同时对于途径研究应用作了展望.     

乌龙茶品质研究进展

综述了近年来乌龙茶品质的研究进展，介绍了乌龙茶的感官品质特征，阐述了乌龙茶的理化品质特征和相关药理作用，分析了影响乌龙茶品质的主要因素，概述了乌龙茶品质研究技术，提出乌龙茶品质下一步的研究重点方向。     

应用改进的通用荧光PCR引物进行多重STR分型

通过设计通用荧光PCR引物并结合DNA测序系统建立了小鼠的多重STR分型方案.实验针对小鼠基因组设计了两对不同的通用引物序列,标记了FAM荧光的通用序列和"加尾"的位点特异性引物共同用于小鼠的多重PCR的STR基因分型.本研究优化了通用引物和特异性引物间的比例,优化了多重STR-PCR的反应条件,并最终利用该技术方案实现了五重STR分型.实验验证了该方案在多重STR分型中的可行性.与传统的荧光检测PCR产物方案相比,应用通用方案完成多重PCR反应大大节省了实验时间与经费.     

酷想大晒台

哎呀呀,这个世界乱套了!大人变成了小孩,小孩变成了大人。现在,终于轮到各位小酷想家来当家做主了,快来看看他们都有什么出色的表现吧!看到爸妈变成了小孩,我立马学着他们的样子,下达了第一道命令:写作业去!我想他们一定会哭的,因为老师留的作业实在是太多了。新浪YOYO     

越来越苍老的世界

中国全面推行计划生育政策,少生了3亿多人,节约了7万亿抚养费,也少了3亿可以负担养老的劳动力。由于老龄化加速,老年抚养比由1964年的6.4%上升为2002年的11.6%,离退休金平均实际递增18.9%。到2050年,中国的抚养比将可能达到70%。老龄化速度,法国用了115年,英国用了80年,美国用了60年,我国用了18年。     

亚热带丘陵茶园间作白三叶的土壤环境调控效果

在亚热带丘陵区1年生幼龄茶园通过连续4年间作白三叶大田试验,研究了其对茶园土壤环境及茶叶品质、产量的影响,结果表明,茶园间作白三叶降低了土壤容重,提高了土壤孔隙度、有机质、全氮、水解氮的含量及钾的活性,消耗了部分有效磷;增加了土壤关键层次（0～20cm）和关键时期（4～6月）的水分含量,延缓和缩短了夏季高温干旱与秋季持续干旱时间;获得了土壤降温时增温、保温与升温时降温的双向动态调控效果．增加了同一层次土壤温度的稳定性,延缓了高温和低温的出现时间,缩短了过度高温时间。从而促进了茶树生长,改善了茶叶品质,显著增加了茶叶产量。与清耕茶园相比,茶园间作白三叶后,春秋茶的酚氨比分别下降了17．10％和30．90％,产量提高了32.65％。     

蛋白质活性计量技术研究进展

随着科学的发展和社会的进步,生命科学已经从现象描述发展到了精准定量的阶段,国际上蛋白质计量技术也已经取得了长足的进展。目前已经初步构建了蛋白质计量的框架体系,并建立了相应的量值传递方法,形成了基本固定的研究模式。综述了迄今为止蛋白质活性计量技术的研究进展以及取得的突破,重点介绍了酶催化活性浓度、蛋白质免疫亲和活性浓度计量技术及其应用。最后对蛋白质活性计量技术未来的发展方向进行了总结与展望。     

远程教育培训给生物教学带来新的生机

远程教育培训给生物教学带来新的生机。夯实了专业知识,梳理了生物知识,使我认识到应该如何把握生物课堂教学,提高了课堂教学设计能力,凝聚了生物教师的力量,使老师们学到了很多知识和教学技能,解决了平时教学中的一些难题,提升了生物的教学水平。     

砷对烤烟(Nicotiana tabacum L.)碳代谢的影响

采用盆栽试验,系统地研究了砷对烤烟全生育期碳代谢及其过程的影响,结果表明,砷降低了烤烟整个生育期的叶绿素含量、光合速率、蔗糖合成酶（SS,合成方向）活性和现蕾以后的蔗糖磷酸合成酶（SPS）活性,提高了全生育期的SS（分解方向）活性和可溶性糖含量,因而抑制了碳的同化和蔗糖的合成,促进了蔗糖的分解,不利于碳向积累方向转化。砷提高了全生育期的腺苷二磷酸葡萄糖焦磷酸化酶（ADPG-PPase）活性,增加了团棵期和现蕾期淀粉的积累,降低了团棵期和采收期的可溶性淀粉酶（SSS）活性和采收期的淀粉含量,从而导致了碳积累代谢的紊乱,最终造成碳积累的减少。     

生态条件的多样性变化对蜜蜂生存的影响

蜜蜂在整个生态系统中起着重要的传花授粉作用,是生态链中不可或缺的物种。随着现代农业的发展,蜜蜂赖以生存的环境遭到破坏,继而引发蜜蜂数量大幅减少,影响了蜂种的生存与可持续发展。总结了近年来生态条件的变化,归纳了影响蜜蜂生存的主要因素,分析了蜜蜂生存艰难的原因,提出了蜜蜂生存的关键问题,并展望了未来维持蜜蜂强群的主要研究方向。     

HIGH AND LOW DENSITY WATER AND RESTING,ACTIVE AND TRANSFORMED CELLS

Resting and active states of cells are described in terms of the expectation, derived from experiments with aqueous polymers, that they contain two modified forms of water: high density, reactive, fluid water and low density, inert, viscous water. Low density water predominates in a resting cell and is converted to high density water in an active cell. It is proposed that switching from one state to another is an integral part of cellular function. When this ability is lost cells are transformed either to a state of rigor or to a hyperactive state in which they no longer depend upon external signals.     

SPHINGOLIPIDS AND PHOSPHOLIPIDS IN MICROSOMES AND MYELIN FROM NORMAL AND PATHOLOGICAL BRAINS

—Myelin and microsomes were separated from human cerebral white matter and cortex respectively using the technique of 15% caesium chloride and their sphingolipid and phospholipid contents estimated. Normal brains as well as cerebral material from cases of metachromatic leucodystrophy, Krabbe's disease and Tay-Sachs’disease were studied. Gangliosides were not present in normal myelin but were found in microsomes and in myelin from the pathological material. The ratio of cerebroside to sulphatide in myelin was 4 to 1 in normal, 1 to 20 in metachromatic and 7 to 1 in Krabbe's disease. The results in the human material are briefly discussed.     

FACTS AND FALLACIES ABOUT GONORRHEA AND SYPHILIS

The limitations and special usefulness of clinical and laboratory diagnostic techniques in the diagnosis of gonorrhea are poorly understood and utilized by the average practitioner today. Most physicians and clinics, lulled by complacency or lack of ancillary aid in the area of diagnosis, proceed by measures based in many instances upon past fallacy rather than upon the facts recently developed by research in this disease. The same circumstances apply concerning treatment and management of this disease, particularly in females.All physicians are potentially capable of giving excellent treatment for syphilis today. The problem is to properly diagnose the disease, manage the patient and deal with the source. Looming large in the area of diagnosis is the interpretation of serologic tests for syphilis. No serologic test diagnoses syphilis, but rather gives information as to the immunologic status of the the patient in relation to reagin and treponemal antibodies. None of the antibodies measured in these tests are absolutely specific for syphilis alone.There is no substitute for a well-informed physician, who knows his patient, to relate and interpret even the best of treponemal serologic tests.