深圳塘朗山郊野公园的植物资源

广东深圳塘朗山郊野公园共有野生维管植物144科423属611种,分别占广东省维管植物280科1589属5737种的51.4%、26.7%和10.65%;其中蕨类省植物21科29属33种,裸子植物3科3属4种,被子植物120科391属574种,被子植物占绝对优势。国家重点保护野生植物共计7科7属7种,占广东省国家重点保护野生植物的10.9%;珍稀濒危植物有4科5属5种,占广东省珍稀濒危植物67种的7%。公园中经济植物可分为12类,分别是药用植物321种,用材树种65种,观赏植物60种,纤维植物41种,野生水果33种,油脂植物38种,饲料植物42种,鞣料植物42种,野菜植物25种,农药植物27种,芳香植物26种,淀粉植物23种,保健植物19种,染料植物13种,有毒植物10种,蜜源植物5种。     

浙江磐安种子植物区系的特征分析

磐安约有野生种子植物 1 44科 ,62 7属 ,1 2 98种 (包括种以下分类单位 )。其中世界成分的属 67个 ,占总属数的 1 0 .69% ,热带属 2 2 7个 ,占 36.2 0 % ,温带属 32 1个 ,占 5 1 .2 0 % ,中国特有属 1 2个 ,占 1 .91 %。磐安气候温暖湿润 ,植物种类丰富 ,古老、孑遗、珍稀植物多 ,单种属和少种属占有较大比重 ;优势科、优势属明显 ,优势科 34个 ,共含有 393属 ,776种 ,分别占总属数总种属的 62 .7% ,70 .3% ,优势属 1 0个 ,共含有 1 44种 ,分别占总属数总种数的 1 .6% ,1 1 .1 % ,其中樟科、壳斗科等是该区系的表征科 ;植物分布类型多样 ,地理成分复杂 ,温带成分和热带成分占优势 ,是亚热带分布的北缘 ,与世界各地有广泛的联系     

中国缩颜蚜蝇族种类记述及地理分布(双翅目:食蚜蝇科)

本文记述了我国双翅目食蚜蝇科缩颜蚜蝇族6属23种,其中有5新种2新纪录属13新纪录种,列出了属、种检索表,并对新种进行了形态描述,同时,对此族的地理分布、区系及起源进行了初步探讨。     

Estimates of a Treatment Effect Based on Censored Data Rank Tests

Linear rank test statistics are applied to the problem of estimating a treatment effect if two sets of censored failure time data are compared and the distributions of the log-failure times of the two samples are assumed to differ only in location. Rank tests for this accelerated failure time model are reviewed and Hodges-Lehmann type estimates for the shift parameter are proposed. Properties of these estimates are investigated, computational aspects are discussed and an example is presented.     

潮汕地区农药植物资源初探

潮汕地区农药植物资源十分丰富。初步调查统计共有 88科 2 39种 ,其中蕨类植物 4种 ,裸子植物 6种 ,被子植物2 2 9种 ,这些农药植物均具有杀虫作用。本文对潮汕地区农药植物的研究和合理开发利用提出了若干建议     

江西木兰科植物的初步整理

通过野外采集及标本的整理鉴定, 确认江西产木兰科植物7 属22 种1 亚种, 其中3 种为江西特有种, 5 种为江西地理新分布。对各分类群进行了分类检索, 记载了其地理分布, 并列出凭证标本。     

昆明地区两栖动物多样性及保护研究

昆明地区共有21种两栖动物,隶2目8科12属。区系特点是：物种多样性很丰富,多于我国9个省区;东洋界种类有20种占绝对优势,没有古北界种类,古北东洋两界广布种仅1种;明显具西南区的特色有16种,特有种多,呈贡嵘螈及滇螈是昆明特有种,也是云南特有种,另有滇蛙等12种为中国特有种;模式产地为昆明的种类多,有7种;姬蛙科属种多,共3属4种。该文阐述了昆明为模式产地的种类现状,还提出了昆明地区两栖类的保护对策。     

Quantification of phase coupling and information transfer between electroencephalographic (EEG) signals: Analysis strategies,models and simulations

Different types of phase coupling between and within EEG signals are theoretically explained and coupling-related analysis strategies are reported. Effects of synchronization have been distinguished from effects signal transfer (propagation), where both are designated by a phase coupling. Six examples of phase coupling analysis are presented. The EEG data are derived from our previous investigations and analysis results are complemented by modelling and simulation studies.     

广西金钟山鸟类保护区鸟类多样性初步研究

本文共记录到金钟山鸟类274种,分别隶属于18目57科,其中陆生鸟类251种,水鸟23种;以留鸟为主,共157种;候鸟、旅鸟分别为104种、13种;东洋种为优势类群,共有171种,古北种和广布种分别为4种、27种。这些鸟类中有国家重点保护鸟类39种,中国特有种鸟类3种,列入世界自然保护联盟红皮书名录中的鸟类5种,列入中国濒危动物红皮书名录中的鸟类20种,列入CITES附录中的鸟类34种。本文还对金钟山鸟类保护区的5种不同生境类型的鸟类种类组成作了比较,结果表明灌丛＋农田的鸟种多样性指数最高,为3．04;水域的鸟种多样性指数最低,为2．14。     

芜湖发电厂灰渣场植被状况

经实地考察发现,芜湖火力发电厂灰渣场自然定居的高等植物有30种,隶属于14个科29个属,主要包括菊科,禾本科和豆科,全部植物中,1,2年生草本植物18种,多年生草本植物9种,木本植物2种,影响植物分布的主要因素是灰渣的理化性质和灰渣场的自然改造程度。     

新疆蝗总科区系研究

新疆现有蝗虫１５７种,它们分别隶属于８科６２属。在１５７种蝗虫中,古北种占绝对优势,有１２０种,其次为特有种,有３５种,广布种甚少,仅２种。在古北种中,中亚种最多,其次为泛古北种,而欧洲西伯利亚种、地中海种和东北种均很少。在８个科中,泛古北种在网翅蝗科中占优势,中亚种在班翅蝗科中占优势,斑腿蝗科在蝗总科中是相当大的一个科,在我国也占有很大优势,但在新疆其属种数量却很少。     

The role of nucleotides in human fragile site expression

Fragile sites are points on chromosomes which tend to break non-randomly when exposed to specific chemical agents or conditions of tissue culture. There are 3 groups of rare fragile sites, and carriers of these range in incidnece from about 1 in 20 to 1 in several thousand individuals. Rare fragile sites are essentially chromosome variants with no known phenotypic consequence, except for the fragile X which is associated with the commonest inherited form of mental retardation in man. There are also 3 groups of common fragile sites, carried by all or most individuals. These are part of normal chromosomal architecture. Expression of most of the groups of gragile sites is mediated by perturbations of the nucleotide pool and these, as they relate to each group of fragile sites, are discussed. The rare folate-sensitive fragile sites are expressed when thymidylate or deoxycytidine are in limited supply during DNA synthesis. Other rare fragile sites are induced by bromodeoxyuridine (BrdU). Sets of common fragile sites are induced by BrdU, 5-azacytidine and aphidicolin. Various hypotheses on the molecular nature of fragil sites are considered.     

东北地区蒙古栎群落区系成分

根据吴征镒、王荷生区系分析方法, 分析了东北地区蒙古栎群落中２６１ 种维管植物的区系成分, 其中温带成分占４７－４７ ％ , 东亚成分占４２－０２ ％ , 中国特有成分占１０－５１ ％ （ 世界分布不统计在内） 。并分析了种所在属的分布区类型, 温带分布属占９０－３％ 。还分别分析了蒙古栎群落的乔木层、灌木层、草本层以及层间植物的区系成分。     

Wood, bark and stem anatomy of New World species of Gnetum

Quantitative and qualitative data are presented for 11 collections of six species. The wide range of character states for the species is presented in the form of a key to emphasize their potential systematic correlations. Distinctive among these are phcllem characteristics. Fibre-tracheids are newly reported for lianoid Gnetum species. Cells previously thought to be like companion cells in secondary phloem are shown to be uniseriate rays, counterparts to uniseriate xylem rays. Laticifers are abundant in most of the species, and are newly described for secondary tissues of Gnetum. Presence of tyloses in laticifers of two species is apparently a new report for vascular plants. Tori are present in two New World Gnetum species, adding to the report in African species. Perforation plates are simple except near or in primary xylem, where they are simple or foraminate. Torus presence and foraminate perforation plate presence are features more reminiscent of Ephedra and other gymnosperms than of angiosperms. The bark of Gnetum is also very similar to that of Ephedra.     

中国虫草属已知种类及其分布

对中国虫草属(Cordyceps(Fr．)Link)真菌进行了整理、修订,对有关分类学问题进行了简要讨论。文献记载我国该属有139个名称,分布于29个省区。其中,有效名称130个(包括125种、3变种和2变型),无效或不合格名称3种,错拼名称2种,存疑种4种,有无性型报道的种类38种,中国特有种46个。     

Molecular Identification of Tropical Tasar Silkworm (Antheraea mylitta) Ecoraces with RAPD and SCAR Markers

The tropical tasar silkworm, Antheraea mylitta, has several ecoraces, 10 of which are commercially exploited for the production of tasar silk. These ecoraces are identified by morphological markers that are greatly influenced by photoperiod, humidity, altitude, and host plants. The DNA markers, random amplification of polymorphic DNA (RAPD), and sequence-characterized amplified region (SCAR) are identified to complement the existing morphological markers. Seven RAPD bands are selected that identify 8 of the 10 ecoraces. These identified RAPD fragments are sequenced and primers are designed for SCAR markers. Of the seven sets of primers, a single primer pair produced polymorphic SCAR bands that diagnose 5 of the 10 ecoraces. All 10 ecoraces are identified by the use of RAPD and SCAR markers together.     

离体草鱼肠道对亮氨酸和酪氨酸的吸收与利用

采用同位素示踪和肠道离体灌流方法,研究了草鱼离体肠道对亮氨酸(Leu)、酪氨酸(Tyr)的吸收转运与利用。实验结果表明:当Leu浓度从1.0mmol/L增加到5.0mmol/L、10mmol/L时,肠道吸收转运的速度表现出“高浓度抑制”效应,运输到肠道外的比例为83%、66%和35%;合成肠道蛋白质的比例为2%、5%和13%;肠道组织内游离形式的比例为9%、28%和49%;其他形式的比例为6%、1%和3%。Tyr浓度从0.5mmol/L增加到1.5mmol/L、2.5mmol/L时,肠道对Tyr的吸收转运速度也随之增加,运输到肠道外的比例为52%、55%和55%;合成肠道蛋白质的比例为17%、15%和16%:肠道组织内游离形式的比例为7%、10%和16%;其他形式的比例为24%、20%和13%。肠道在吸收转运Leu和Tyr的同时,也利用它们合成蛋白质的和其他方面,Leu的吸收利用受灌流试验氨基酸浓度影响较大、而Tyr受影响较小;随着肠道内灌流的试验氨基酸浓度增加,吸收转运到肠道外的比例下降、留存于肠道内的比例增加,肠道合成的蛋白质绝对量也增加。       

Scope and limitation in algal modelling – an example from the Thames Valley reservoirs

Major aspects of algal modelling are defined.Prediction and explanation are suggested as mainobjectives. Examples of the development and use ofshort-term prediction and more general explanatoryalgal models for reservoirs are given. It is concludedthat good prediction and explanation are not likely tobe simultaneously achievable. Possible means ofassessing the capabilities of ecosystem models andmodelling are considered. Some suggestions as to howthe present situation may be coped with, and improved,are proposed.     

粤东地区的国家保护植物

经调查粤东地区有中国珍稀濒危保护植物 2 7种 (含栽培种 ) ,分属于 2 4科 2 6属 ,占广东境内分布的中国珍稀濒危保护植物的 4 5 .8% ,占全国分布的 6 .9%。其中蕨类植物 1种 ,裸子植物 6种 ,被子植物 2 0种 ;确定为濒危植物的有 5种 ,稀有的 4种 ,渐危的 18种 ;被列为一级重点保护的 1种 ,二级重点保护的 7种 ,三级重点保护的 19种。有国家重点保护野生植物2 2种 (含栽培种 ) ,分属于 2 0科 2 0属 ,占全国重点保护野生植物的 8.3%。其中蕨类植物 5种 ,裸子植物 6种 ,被子植物 11种 ;被列为一级重点保护的 6种 ,二级重点保护的 16种。其国家保护植物资源具有种类丰富、古老性强、中国特有现象突出等特点。对其名录特点和利用价值也进行了分析