膝瓣乌头的一个新变种

长距膝瓣乌头 新变种Aconitum geniculatum Fletch. et Lauener var. longicalcaratum M. Li, var. nov.A var. geniculato differt sepalo supero humiliore, petalorum calcaribus longioribus circ.     

青海省异极藻属和桥弯藻属(硅藻门)的新变种

本文对来自青海省异极藻属和桥弯藻属(硅藻门)的三个新变种进行描述,它们是:橄榄异极藻短纹变种(Gomphonema olivaceum (Lyngbye) Kuetzing var. brevistriatum Li Y. L. et Shi, var. nov.);十字异极藻矩形变种(Gomphonema staurophorum (Pant.) Cleve-Euler var oblongum Li Y. L. et Shi, var. nov)和亚贝桥弯藻具点变种(Cymbella yabe Skvortzow var. punctata Li Y. L. et Shi, var. nov).       

四川芸香科的研究

本文发表了2新种,4新变种,即串果常山Orixa racemosa Z.M.Tan,nov.sp.;薄革叶常山Orixa subcoriacea Z.M.Tan,sp.nov.;疏毛刺花椒Za-nthoxylum acanthopodium DC.var.oligotrichum Z.M.Tan,var.nov.;刺边岘壳花椒Zanthoxylum dissitum Hemsl.var.spinulosum Z.M.Tan,var.nov.;毛臭节草Boenninghausenia albiflora Reichb.var.pilosa Z.M.Tan,var.nov.;小飞龙掌血Toddalia asiatica(L.) Lam.var parva Z.M.Tan,var.nov.。     

中国隐子草属二新变种

本文发表隐子草属Cleistogenes两新变种, 即多枝隐子草C.caespitosa Keng var.ramosa F.Z.Li et C.K.Ni, var.nov.天目山隐子草C.ramiflora Keng et C.P.Wang var.tianmushanensis F.Z, LietC.K.Ni.var.nov.     

东北蒿属新分类群

本文发表了中国东北菊科蒿属1个新亚种,3个新变种,即;北牡蒿Artemisia eriopoda Bge.subsp.jiagedaqiensis.G.Y.Chang et X.J.Liu,subsp.nov.,兴凯光沙蒿A.oxycephala kitag.var.xinkaiensis G.Y.Chang.et L.S.Wang,var.nov.,塔河柔毛蒿A.pubescens Ledeb.var.taheensis G.Y.Chang et L.S.Wang,var.nov.和线叶沙蒿A.desertorum Spreng.var.lineata G.Y.Chang,var.nov。     

河南齿叶白鹃梅一新变种

多毛白鹃梅 新变种 Exochorda serratifolia S. Moore var. polytricha C. S. Zhu, var. nov. A var. serratifolia ramulis hornotinis, rhachidibus inflorescentiarum, pedicellis, petioliset foliorum laminis subtus dense crispe albo-pubescentibus differt.     

Validation of the name Callicarpa bodinieri var.iteophylla (Lamiaceae)

Callicarpa bodinieri H.Léveillé var.iteophylla C.Y.Wu,var.nov.Type:China.Yunnan:Mengla,1953-06-03,Yong-Shu Wang 27 (holotype,KUN 0484466!;isotype,KUN 0484467!).Validating diagnosis:Those ofCallicarpa bodinieri H.Léveillé var.iteophylla C.Y.Wu,Fl.Yunnan.1:406.1977.Callicarpa bodinieri H.Léveillé var.iteophylla C.Y.Wu is endemic to southern Yunnan province of China,and it occurs in mixed forests at altitudes between 600 and 1600 m.This new variety is easily distinguished from var.bodinieri and var.rosthornii (Diels)Rehder in that the leaf blade is lanceolate,oblanceolate,or obovateoblong,and 2-4 cm wide (vs.narrowly elliptic,elliptic,or ovateelliptic,and 4-7 cm wide in var.bodinieri),and subglabrous on both surfaces (vs.abaxially grayish stellate pubescent in var.rosthornii).     

中国虎耳草科天胡荽金腰一新变种

广东金腰 新变种 Chrysosplenium hydrocotylifolium Levl. et Vant. var. guangdongense S. J. Xu et Z.X. Li, var. nov. A var. hydrocotylifolio differt laminis foliorum supra hispidis et subtus dense pubescen-     

中国悬钩子属新分类群

近年来对我国9个省的悬钩子属植物资源进行了调查采集,并在南京中山植物园建立了田间种质库进行观察研究。本文报导在云南省悬钩子资源调查中发现的1个新种和5个新变种,它们是:Rubus godongensis Gu et Li, R. biflorus Buch.-Ham.ex Smith var.spinocalycinus Gu et Li, R. glabricarpus Cheng var.eglandulosus Gu et Li, R. gongshanensis Yü et Lu var.eglandulosus Gu et Li, R. parvifolius L.var.purpureus Gu et Li, R. viburnifolius Focke var.apetalus Gu etLi.     

湖北苔草属新分类群

多束苔草新变种Carex omeiensis Tang et wang var multifascula Q.S.Wang,var.nov     

Inhibition of Cathepsin B1 by E-64, a Thiol Proteinase Inhibitor,and Its Derivatives

Four formaldehyde-resistant yeasts were isolated from soil. Three were tentatively identified as Debaryomyces vanriji and one as Trichosporon penicillatum. These yeasts almost completely consumed formaldehyde at 0.15 to 0.55% in growth medium containing glucose as carbon source, but the carbon of formaldehyde was not incorporated into the cell constituents. In formaldehyde-containing medium, yeast growth occurred after formaldehyde consumption. The yeasts showed relatively high activities of formaldehyde dehydrogenase, S-formylglutathione hydrolase and formate dehydrogenase. The resistance to formaldehyde is attributed to detoxification by oxidation.     

Identification of a Methioninase Inhibitor,Myrsinoic Acid B,from Myrsine seguinii Lév., and Its Inhibitory Activities

A methioninase inhibitor from Myrsine seguinii was purified and identified as myrsinoic acid B. Its inhibitory activities as to crude methioninase from periodontal bacteria such as Fusobacterium nucleatum, Porphyromonas gingivalis, and Treponema denticola were determined. The IC₅₀ values were 10.5, 82.4, and 30.3 μM respectively.     

Myrsinoic Acid E,an Anti-inflammatory Compound from Myrsine seguinii

The methanolic extract of Myrsine seguinii yielded the novel anti-inflammatory compound, myrsinoic acid E (1), whose structure was elucidated to be 3,5-digeranyl-4-hydroxy benzoic acid. We synthesized 1- and its 3,5-diprenyl (2) and 3,5-difarnesyl analogues (3). Compounds 1-3 suppressed 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced inflammation of mouse ears by 59%, 14%, and 69% at a dose of 1.4 μmol.     

Benzoquinone derivatives of Myrsine africana and Maesa lanceolata

The fruits of Myrsine africana afforded two new benzoquinone derivatives, methylvilangin and methylanhydrovilangin. On the other hand, from the fruits of Maesa lanceolata two more novel compounds; 2,5-dihydroxy-3-(nonadec-14-enyl)-benzoquinone and lanciaquinone were isolated. Their structural elucidation was achieved by spectroscopic measurements including 2D NMR experiments.     

桂林岩溶石山密花树群落主要物种的种间关联及群落稳定性

研究群落内主要物种的种间关联及群落稳定性,有助于正确地认识种间关系和物种共存机制,进而能为植被的恢复与重建以及生物多样性保护等提供理论依据。然而桂林岩溶石山密花树群落主要物种的种间关联及群落稳定性仍不明确。基于群落调查数据,采用方差比率法(VR)、χ²检验、Pearson相关检验、Spearman秩相关检验和M.Godron稳定性等方法,对该群落主要物种的种间关联及群落稳定性进行研究。结果表明:(1)该群落乔木层、灌木层和草本层主要物种间的总体关联性均呈显著负关联;(2)χ²检验结果显示,各层次绝大部分种对均无显著关联,种间关联较松散,各物种间呈独立分布格局;(3) Pearson相关检验和Spearman秩相关检验发现,各层次绝大部分种对均呈不显著相关,种间相关性较弱;(4) M.Godron稳定性结果表明,整个群落及其各垂直层次的稳定性测定结果均远离20/80,皆处于不稳定状态。研究显示桂林岩溶石山密花树群落种间关联较松散,各物种呈相对独立分布格局,群落处于不稳定的演替早期阶段。因此,在岩溶地区植被恢复与重建过程中,应将资源利用方式、生物学特征和生态学习性相近,对生境要求相似的优势乡土物种搭配在一起。此外,可采取适当的抚育措施,调节种间关系,提高群落稳定性。     

注射装载孕酮的红细胞膜泡诱发蟾蜍卵成熟的研究

中华大蟾蜍长足的卵母细胞,经注入装载水相孕酮的红细胞膜泡,能被诱发成熟;直接注入水相孕酮的卵母细胞,无能恢复成熟分裂。将蛋白酶处理的红细胞制备成装载水相孕酮的膜泡,注入卵内,照样能诱发其成熟分裂;然而,分别用根皮素结合或磷脂酶A_2水解红细胞膜磷脂,制备的膜泡,虽亦包裹着水相孕酮,但注射的卵母细胞都未能被诱发成熟。这些结果表明,在通过红细胞膜转运孕酮诱发卵母细胞成熟过程中,红细胞膜上的某些膜蛋白可能不是必要的成份,而膜磷脂类却是关键成份,它不仅可能保证孕酮不被迅速代谢,且保证孕酮从卵母细胞内部诱发成熟分裂。     

金鱼精子质膜和核膜的区域特异性

本文结合采用扫描和透射电子显微镜(包括冷冻断裂-蚀刻、超薄切片以及细胞化学染色法),研究了金鱼精子的超微结构特征,结果表明金鱼精子的质膜和核膜都具有区域特异性:1)精子质膜内大部分区域含有许多蛋白颗粒,但在特定区域内,蛋白颗粒呈有序排列,构成晶格状结构。2)精子头颈部和尾部均有液泡密集之处,凡是覆盖着液泡区的质膜内,几乎都不含有蛋白颗粒。3)液泡区能被细胞化学方法染成致密色,表明内含糖蛋白。4)核膜孔只集中存在于靠近颈部的核膜上,而其他部分则没有。本文对上述诸点进行了讨论。     

多种神经活性物质在幼年猫和鸡视网膜神经细胞中的共存(简报)

视网膜起源于前脑泡,结构简单层次分明,因此常被视为脑的简化模型。但近期工作证明,视网膜包含的神经活性物质(神经递质、调质和神经肽)种类之多、分布之复杂并不亚于脑。尤其是无长突细胞不仅包含多种递质和肽类,而且还有递质与肽类或肽类与肽类在一个细胞中的共存。对视网膜神经递质、调质和神经肽的研究将是探索脑奥秘的有效途径。     

Chlorophyll isolation,structure and function: major landmarks of the early history of research in the Russian Empire and the Soviet Union

This paper covers major events of the early history of chlorophyll research in the Russian Empire and the Soviet Union from 1771 until 1952, when the modern period of studies on photosynthesis began in full swing. Short biographical sketches of key scientists, reviews of their major research contributions and some selected photographs are included. This revised version was published online in August 2006 with corrections to the Cover Date.