Figs,Wasps, Carrots and Sticks? A New Theoretical Approach to Understanding the Origin and Nature of Mutualisms and Symbiotic Relationships

<正>Mutualisms—relationships where by two organisms live in tandem with one another,each providing a service to the other—are among the most interesting and complex relationships in nature.These kinds of relationships are generally considered cooperative interactions,whereby each of the organisms incurs substantial cost in trading services with its partner in order for each of them to gain some benefit and increase their chances of survival and evolutionary fitness.While     

Reef builders found along southern coastline of Zhejiang

Together with a local co-worker, TANG Zhican, a specialist in benthonic bioecology and tax onomy of coral,hydra and other cnidarian organisms     

Microbes in mass extinction: an accomplice or a savior?OA

<正>Microbes include various types of organisms that are invisible to the naked eye,e.g. bacteria, archaea and microeukaryotes. Although the precise number remains largely unknown, microbes are recognized as the unseen majority of our biosphere [1]. As a group of organisms classified by body size, microbes cover a considerable spectrum of metabolisms,     

The C:N:P stoichiometry in bryophytes: relationships with habitat,climate and growth formOA

<正>The elemental composition and stoichiometry of organisms provide a useful lens for explaining and predicting ecological paterns and processes. However, few studies have focused on stoichiometry in bryophytes, even though they are abundant in many pristine ecosystems. Several case studies found variable paterns in bryophyte stoichiometry(e.g. [1,2]).     

Studies Shed Light on Origin of New Genes

A lthough scientists are cer- tain that genomes of vari- ous organisms differgreatly in terms of numbers ofgenes contained, until recentlythey know little about process oforigin of new genes. So gene gen-esis mechanism has become amajor issue puzzling researchersin the field of evolutionarybiology. Prof. Wang Wen of the CASKunming Instituteof Zoology andhis collaborators have discovereda novel gene genesis mechanismand their research will shed lighton the understanding of the evo-…     

New Technique Developed to Identify Clusters of Proteins on the Plasma Membrane of Immune Cells

<正>When our bodies are under attack from foreign organisms,such as bacteria and viruses,our immune system orchestrates a complex fight-back involving many separate parts.One important component of this response is a type of cell called the B-lymphocyte–it is this cell that is at the forefront of our     

An unexpected role for ergothioneine

<正>Ever since the appearance of atmospheric oxygen,organisms have needed ways to protect themselves from damage caused by oxidative stress.Glutathione(GSH,Fig.1A)is the dominant organothiol in eukarya to detoxify products formed from oxidative stress.In bacteria,several diferent small molecule thiols have     

Three Is Better Than Two,for Suffered Bacteria Living under Stress

<正>In response to environmental signals,the expression levels of responsive genes of organisms have to change accordingly for long-term survival.This process is far more complicated than a simple"on-off"switch,but has a subtle pattern that is subject to tight regulation.Among the known kinetic patterns,expression     

Composites with high omnidirectional fracture toughness due to helical interlocking fasteners are found in gingko seed shellsOA

<正>Engineering of composites mimicking load-bearing materials from living organisms is essential for sustainable economic development and successful resolution of current and future bottle-necks of chemical,automotive,aviation,biomedical,and robotic technologies.As pointed out by G.Wiedemann[1]in 1853 and M.F.Ashby et al.     

Insect-specific proteins identified

With nearly one million classified and named species, the insecta clade is the most diverse group of higher organisms on earth in terms of category, behavior, physiology and genetics.     

《中国科技期刊研究》论文及文献源评析

运用文献计量学原理,对<中国科技期刊研究>1995～1998年刊载的论文及文献源进行了统计分析,计算出该刊的普赖斯指数和科技期刊研究者常用的重要中文期刊,并对各种数据进行了分析和讨论.     

机械科学技术与我国经济发展和社会进步

概括和总结了现代机械科学技术发展的特点和趋势,阐述了机械科学技术作为一门重要的基础性工程科学技术,对经济发展和社会进步所起的积极推动作用.在此基础上对我国目前的机械科学技术和机械工业的发展现状作了简要分析,指出我国机械科学技术研究发展工作中存在的问题和不足,并就发展我国机械科学技术和机械工业的对策进行了讨论.     

科技期刊评估分析与其学术质量的关系

分析了我国科技期刊及论文在<科学引文索引>(SCI)上的收录情况;阐述了<中国科学引文索引>(CSCI)、中文核心期刊、全国优秀科技期刊之间的关系及提高科技期刊发表论文入选率的6条措施.     

音乐及音响的评价与听辨浅析

文章针对一些典型的音乐及音响进行了评价,并对音响听辩效果进行了简单的分析,既展示了音乐及音响的美妙,也为专业性的欣赏、评价及制作进行了初步探讨。     

新马两国思想政治教育异同分析及启示

新加坡与马来西亚在地理位置、历史文化传统上有很多相似之处,这对两国的思想政治教育也产生了一定的影响。两国的思想政治教育既有相同之处也有不同之处。本文通过对新马两国思想政治教育的内容和方法进行异同分析,进而得到两国思想政治教育比较的启示。     

新马两国思想政治教育异同分析及启示

新加坡与马来西亚在地理位置、历史文化传统上有很多相似之处,这对两国的思想政治教育也产生了一定的影响。两国的思想政治教育既有相同之处也有不同之处。本文通过对新马两国思想政治教育的内容和方法进行异同分析,进而得到两国思想政治教育比较的启示。     

试用哈罗德——多玛理论分析科技期刊的供需失衡

本文试用哈罗德－－多玛投资理论分析对科技期刊的投资在期刊供给和需求方面的非对称性，以及其形成的原因，并重点讨论了期刊供给大于需求的原因，因为这是当前科技期刊普遍存在的现象。     

浅谈公共卫生与疾病预防控制体系建设

此次新冠肺炎疫情传播速度快、影响范围广、防控难度大,在没有特异性治疗药物和疫苗的情况下,我国通过最全面彻底的、以"非医疗干预"手段为主的防控举措,全社会动员,全民参与,科学防治、精准防治,有效遏制了本土疫情,取得了阶段性重要成效。在此次疫情防控中,我国各级公共卫生与疾病预防控制(以下简称"疾控")体系起到了重要作用,但也暴露出了诸多短板和不足。文章梳理了现阶段我国疾控体系、公共卫生法律法规建设、卫生应急管理政策保障3个方面存在的突出问题,提出了新时代疾控体系的职能任务发展、关键科研技术建设和专业人才资源储备3个方面的具体建议。     

加强高校知识产权保护与管理,促进专利技术成果转化与实施

高校知识产权工作已成为我国高校科技工作的重要组成部分。论文分析高校知识产权管理工作中存在的问题并提出相应的对策;建议构建校企平台,加强高校产学研合作,建立技术转移机构,促进知识产权实施与应用。