不同温度和激素浓度对春兰部分生理活动的影响

通过改变温度，细胞分裂素6-BA浓度后对春兰的过氧化物酶活性、丙二醛、可溶性蛋白质、可溶性多糖含量变化的测定，研究不同培养条件对春兰生理活动的影响．结果显示：春兰的过氧化物酶活性受温度及细胞分裂素浓度影响的强弱顺序是18℃、30℃、26℃、22℃，8mg／L、2mg／L、4mg/L、6mg/L；丙二醛含量受温度及细胞分裂素浓度影响的强弱顺序是30℃、22℃、18℃、26℃，2mg／L、8mg／L、4mg／L、6mg／L；可溶性蛋白质含量受温度及细胞分裂素浓度影响的强弱顺序是26℃、30℃、22℃、18℃，6mg/L、4mg/L、8mg／L、2mg/L；可溶性多糖含量受温度及细胞分裂素浓度影响的强弱顺序是26℃、22℃、30℃、18℃，6mg／L、4mg/L、8mg／L、2mg／L．由此表明春兰在本实验温度范围内，最适生长温度为26℃，最适细胞分裂素6-BA浓度为6mg／L。     

低温逆境下“鲁赫”刺蔷薇抗性分析

结合低温胁迫过程中生理生化指标的变化,对"鲁赫"刺蔷薇(Rosa acicularis‘Lu He’)一年生实生苗、一年生扦插苗、二年生实生苗、二年生扦插苗进行抗寒性评价。在低温(10℃)处理第0,2,4,6,8 d时对其相对电导率、脯氨酸、丙二醛(MDA)、可溶性蛋白质和可溶性糖含量以及过氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性进行测定,并运用隶属函数法进行综合评价。结果表明,随着低温胁迫时间的延长,4类"鲁赫"刺蔷薇苗木的相对电导率、脯氨酸、丙二醛(MDA)、可溶性蛋白质以及可溶性糖含量总体均呈上升趋势,而POD、CAT活性均先升后降,一年生扦插苗的SOD活性先升后降,其它苗木则是先降后升。对生理指标进行综合分析,得出4类苗木的抗寒性顺序为一年生实生苗二年生扦插苗一年生扦插苗二年生实生苗。     

植物低温保剂对辣椒幼苗抗寒力的影响

应用研制的植物低温保护剂喷施辣椒幼苗，生理生化测定表明，电导率，丙二醛含量比对照降低；ＴＴＣ还原率，脯氨酸含量，可溶性总糖和叶绿素含量比对照提高；超氧化歧化酶，过氧化氢酶，过氧化物酶等保护性酶的酶活性也双对照提高；根和叶ＴＴＣ还原率同步升高，电导率同步降低。     

金线莲种质的生理生化特性及内源激素含量差异

比较两个金线莲Anoectochilus roxburghii (Wall.) Lindl.种质的生理生化特性及内源激素含量差异,为后续的金线莲优良品种选育提供参考依据。本研究以福建小圆叶金线莲和福建黑叶金线莲30 d扩繁丛生苗、30 d生根试管苗和30 d温室移栽苗为材料,采用酶联免疫吸附测定法(ELISA)分别测定两个金线莲种质的内源激素含量;可溶性蛋白、可溶性糖、叶绿素和丙二醛(MDA)含量,以及过氧化物酶(POD)活性采用分光光度法测定。试验结果显示在扩繁、生根、移栽过程中,福建小圆叶金线莲可溶性蛋白含量、可溶性总糖含量、POD活性、MDA含量及其体内脱落酸(ABA)、赤霉素(GA)含量均高于福建黑叶金线莲,且两个不同种质金线莲扩繁、生根苗的可溶性蛋白、可溶性总糖及其体内玉米素(ZR)、GA和生长素(IAA)含量均显著(P0.05)高于移栽苗。因此,福建小圆叶金线莲可能更易于适应环境的变化。     

植物低温保护剂对辣椒幼苗抗寒力的影响

应用研制的植物低温保护剂（ＰＬＴＰＡ）喷施辣椒幼苗．生理生化测定表明，电导率，丙二醛（ＭＤＡ）含量比对照降低；ＴＴＣ还原率，脯氨酸含量，可溶性总糖和叶绿素含量比对照提高；超氧物歧化酶（ＳＯＤ），过氧化氢酶（ＣＡＴ），过氧化物酶（ＰＯＤ）等保护性酶系统的酶活性也比对照提高；根和叶ＴＴＣ还原率同步升高，电导率同步降低     

龙眼抗热性的研究

以晚熟龙眼品种立冬本为材料,研究其在25、35、40C温度下叶片的过氧化物酶(POD)活性、叶绿素a(chla)、叶绿素b(chlb)、丙二醛(MDA)活性和土壤含水量的变化.研究结果表明chla随着温度的上升呈下降趋势,chlb较稳定、因而导致chla/b的下降;35℃处理的土壤失重率最大,叶片丙二醛(MDA)含量高、过氧化物酶(POD)活性最强;40℃处理其次;龙眼在40℃处理条件下出现叶片失绿、反卷等不良反应,龙眼已开始受到高温危害.     

低温胁迫对六个类型黑果枸杞枝条抗寒性的影响

为了筛选抗寒性较高,能适应新疆北疆冬季低温的黑果枸杞类型,以3个野生型及其相应的优选系黑果枸杞枝条为试验材料,在4(对照)、-25、-30、-35和-40℃条件下进行生理指标测定,对各指标间相关性进行分析,采用主成分分析法、隶属函数法对不同类型黑果枸杞枝条抗寒力进行评价。结果表明:6个类型黑果枸杞枝条的相对电导率呈上升趋势;丙二醛含量呈"升-降-升"的变化趋势;超氧化物歧化酶活性先下降后上升,过氧化物酶、过氧化氢酶活性、可溶性蛋白、可溶性糖含量类型间变化趋势不同,脯氨酸含量呈"升-降-升-降"的变化趋势。相关性分析结果表明,丙二醛与相对电导率呈极显著正相关,可溶性糖与相对电导率呈显著负相关。主成分分析和隶属函数法综合评价6个类型黑果枸杞抗寒性从大到小依次为:西宁优系、库尔勒野生、库尔勒优系、武威野生、西宁野生、武威优系。     

铜、镉及其复合胁迫对麻疯树幼苗生理生化特性的影响

为了研究铜(Cu)、镉(Cd)及其复合胁迫对麻疯树(Jatropha curcas Linn.)幼苗生理生化指标的影响,测定经Cu、Cd及其复合处理后麻疯树幼苗的丙二醛(MDA)含量、根系活力、叶绿素含量、细胞膜透性、可溶性蛋白质含量、可溶性糖含量、过氧化物酶(POD)和脯氨酸含量等的变化情况。研究表明,Cu和Cd的浓度分别为50-400和10-200 mg/L时,对麻疯树幼苗有一定的负效应,且两者的复合处理存在一定的拮抗作用。负效应表现为丙二醛、可溶性蛋白质和脯氨酸含量增加,相对电导率增大,根系活力下降,叶绿素和可溶性糖含量以及过氧化物酶活性下降,表明一定浓度的Cu、Cd会影响或改变麻疯树幼苗部分生理生化特征,对麻疯树幼苗的生长造成一定的危害;当Cu+Cd复合胁迫处理液浓度为(100+50) mg/L时,其对植物细胞中丙二醛产生最大的抑制作用,从而减轻植物细胞受损程度;当Cu+Cd复合胁迫处理液浓度为(50+10) mg/L时,其对植物根系活力的积极影响相对于参照组变化最为明显。适量Cu、Cd重金属含量对植物的生长和保护具有积极影响。     

高温胁迫对珙桐叶片生理生化指标的影响

研究高温胁迫对珙桐叶片生理生化指标的影响. 结果表明：随着胁迫时间的延长,叶绿素和可溶性糖的含量降低;而游离脯氨酸和丙二醛的含量增大;相对电导率增大;超氧化物歧化酶（SOD）、过氧化物酶（POD）和过氧化氢酶（CAT）的活性在胁迫2h时稍微增大,以后随着胁迫时间的延长其活性降低. 通过以上几项生理指标的测定表明：离体珙桐叶片能耐39 ℃的高温胁迫2~4 h.     

百合属几种植物亲缘关系的可溶性蛋白质和过氧化物酶分析

采用聚丙烯酰氨凝胶电泳法，分析了百合属8种植物的可溶性蛋白质和过氧化物酶．结果显示：可溶性蛋白质谱共有48条带，其中26条带为多态性带；过氧化物酶谱共有20条带，19条带具有多态性．根据可溶性蛋白质和过氧化物酶的谱带进行了聚类分析，结果表明，生化水平与传统的形态学分类结果基本一致．     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Editorial note for the special topic on ＂Nanopore Analysis＂

The concept of nanopore analysis, using the pore-forming protein a-hemolysin to detect individual nucleic acids at a single-molecule level, was first proposed in 1996. Over the past two decades, tremendous progress has been made in the nanopore field, and nanopore analysis has become a label-free and high-throughput method for probing bio- molecules and other analytes with single-molecule sensi- tivity, especially holds the promising for ＂third generation＂ DNA sequencing. However, challenges still remain in the experimental strategies and the design of whole nanopore-based instruments. Here, we proudly present a special topic dedicated to the topic of ＂Nanopore Analysis＂, with 8 reviews/articles providing up to date coverage of the experimental strategies, theoretical calcu- lations and simulations, and instrument design. Reviews and articles on the experimental strategies cover control of DNA partitioning into a nanopore, detection of target DNA, and the advantages of nanopore-based DNA sequencing. The theoretical calculations and simulations discuss the translocation behavior of DNA, and an inte- grated measurement system and data analysis software are presented for instrument design.     

Effects of climate change on biodiversity

1 Rise of studies on climate change＇s effects on biodiversity
Until the 1980s, climate change and biodiversity were studied as two independent disciplines for more than a century. In 1992, the Ecological Society of America＇s annual report named climate change, biodiversity, and the sustainable ecological system as the three major global environmental issues of the twenty-first century [1].     

Discussing the Expansive Learning in Modern Organizations

<正>1 Introduction Endeavours on learning methods have long occupied the mind spaces of scholars and there have been theories abound on how people learn and in what way organisations can use some of the knowledge gained in the art of learning to maximise human productivity.While the theories by themselves are not solutions to problems,they are steps of inquiry that provide us with interesting perspectives that we can use to extend our knowledge of the dimensions of learning.This paper is an exploratory work on the theories postulated by three notable scholars including Zimmerman     

Progress in Linear Scaling Non-Orthogonal Localized Molecular Orbitals Method

The non-orthogonal localized molecular orbital(NOLMO)is the most localized representation of electronic degrees of freedom.As such,NOLMOs are thus potentially the most efficient for linear scaling calculations of electronic structures for large systems.However,direct ab initio calculations with NOLMO have not been fully implemented and widely used,partly because of the slow convergence issue in the optimization of NOLMO.We devel-     

An Accurate and Universal HEOM Approach to Strongly Correlated Quantum Impurity Systems

A hierarchical equations of motion(HEOM)approach is developed for general open quantum systems coupled to fermionic environment.The HEOM method is in principle formally exact,as it resolves nonperturbatively the combined effects of many-body interaction,system-bath dissipation,and non-Markovian memory.In practice,the HEOM approach is highly accurate and efficient for the characterization of strongly correlated quantum impurity sys-     

关于有理混合吸引子的Ciric型非唯一不动点定理

本文我们应用有理混合吸引子条件去证明具非唯一不动点的映射Ciric型的若干不动点定理.结果推广并改进已知的一些结果.     

次线性算子交换子在变指数Herz-Morrey空间上的有界性

本文主要利用给出的次线性算子分别与BMO函数及Lipschitz函数生成的交换子在变指数L~(p(·))(R~n)空间上的有界性,证明了其在变指数Herz-Morrey空间MK_(q,p(·))~α~((·)),λ(R~n)上的有界性.     

利用GPS双频观测值实现PPP电离层延迟高阶项改正

给出了利用双频观测值计算L3组合电离层延迟高阶项改正的方法,并与全球电离层延迟文件的改正效果进行对比.利用赤道附近的15个国际全球卫星导航定位系统服务组织(IGS)站的数据进行比较,结果表明:2种方法计算的电离层二阶项延迟互差最大不超过1 cm,三阶项延迟互差最大不超过5 mm;电离层高阶项改正后的观测值精密单点定位(PPP)解算结果N、E、U方向互差平均值分别为0.4、0.5、1.0mm,因此2种改正方法效果在同一水平.