A club-shaped hair found on the first-instar nymphs of Schistocerca gregaria

A receptor found mainly on the antero-dorsal regions of the first-instar nymph of Schistocerca gregaria is described. The fine structure of the sensillum and its associated cells is described and its possible functions discussed in relation to its unusual structure.     

True serial-sectioning of fossil material

A method of cutting serial sections of fossil material using a very thin diamond annular saw, clamped under tension and revolving at 3000 rev/min is described. A small skull of the therapsid reptile Endothiodon has been cut into 104 serial sections 0–6 mm thick. The technique is still in its infancy, but is described to show its potentialities.     

True serial-sectioning of fossil material

A method of cutting serial sections of fossil material using a very thin diamond annular saw, clamped under tension and revolving at 3000 rev/min is described. A small skull of the therapsid reptile Endothiodon has been cut into 104 serial sections 0–6 mm thick. The technique is still in its infancy, but is described to show its potentialities.     

Preparative scale isolation of sphingosine

A high-yield method is described for the preparation of sphingenine from galactosylceramide. Two successive cleavage reactions are used, alkaline butanol to form galactosylsphingosine, then acidic acetonitrile to form the sphingenine. A column purification procedure utilizing silica gel is described. The method is superior to previously described methods in its rapidity and avoidance of isomerization and contamination by racemization and rearrangement products.     

Preparation and properties of a poly A resin and its use in the isolation of naturally occurring poly U sequences

A method for the covalent attachment of poly A, as well as other nucleic acids and nucleosides, to a methylene dianiline derivative of starch is described. The properties of this poly A resin and its use for the recovery of poly U sequences from both nuclear and cytoplasmic extracts of HeLa cells is described.     

Notes on the genus Arisaema(Araceae)in Gaoligong Mountains

本文描写了高黎贡山地区察隅南星Arisaema bogneri P.Boyce et H.Li、腾冲南星五叶变种A.tengtsunense H.Li var.pentaphyllum H.Li、缅甸南星A.burmaense P.Boyce et H.Li;第一次报道会泽南星A.dahaiense H.Li在高黎贡山的分布,对该种的果序和果实作了补充描述。     

Preservation of microorganisms by the method of L-drying

A procedure for L-drying of microorganisms or their drying under vacuum from liquid state is described in detail. The procedure is used in the Culture Collection of the All-Union Research Institute of Antibiotics. Preservation of Acremonium chrysogenum VNIIA 313A, the cephalosporin-producing culture, with the described procedure allowed one not only to maintain its viability for prolonged periods, but also to completely reproduce its initial antibiotic activity. L-Drying of some poorly kept cultures belonging to Acremonium was a success.     

A new species of commensal hoplonemertean from Australia

A new series of hoplonemertean from Australia is described and named Gononemertes australiensis. The morphology of this nemertean, which lives commensally in the ascidian Pyura pachydermatina (Herdman) variety intermedia Herdman, is described and illustrated and its taxonomic placing discussed.     

A facile method for the preparation of deuterium labeled salvinorin A: synthesis of [2,2,2-2H3]-salvinorin A

Salvinorin A is a novel hallucinogen isolated from the widely available leaves of Salvia divinorum. Based on its mechanism of action, salvinorin A has shown potential as a stimulant abuse therapeutic. However, there are no methods for the detection of salvinorin A or its metabolites in biological fluids. In order to begin developing salvinorin A as a potential therapeutic, an understanding of its metabolism is needed. Here, a straightforward synthesis of a deuterium labeled analog of salvinorin A and its utility as an internal standard for the detection of salvinorin A and its metabolites in biological fluids by LC-MS is described.     

High-performance liquid chromatographic determination of ibuprofen and its major metabolites in biological fluids

A sensitive and selective high-performance liquid-chromatographic assay for ibuprofen and its major metabolites in biological fluids is described. To ensure good chromatographic separation the drug and metabolites were run on a gradient elution system and detected with a variable wavelength detector set at 220 nm. A second, more rapid, isocratic system is also described for the detection of only ibuprofen.     

Problems of Distant Communication of Isolated Small Groups

A new psychological phenomenon, distant communication of an isolated small group, is described. Factors affecting distant communication and mechanisms determining the patterns of its development during a long-term spaceflight and model isolation are analyzed. On the basis of the patterns described, the possible development of communication in the spacecraft–Earth loop during a mission to Mars is predicted and methods of its optimization are suggested.     

中国及毗邻地区胖鳖甲属分类研究(鞘翅目,拟步甲科)

对中国及其毗邻地区的胖鳖甲属Syachis Bates,1879进行了分类研究,描述1新种,即西藏胖鳖甲S.xizanganasp.nov.,提供了已知种目录及其检索表.所有研究标本和新种模式标本保存于河北大学博物馆.新种与分布喀喇昆仑山的S cugiae Gridelli,1934在外形上近似,两者的主要区别是:前者前胸背板侧缘弱弧形弯曲,侧缘有皱纹状刻点;额两侧平坦.后者前胸背板两侧强烈弯曲,侧缘附近有细刻点;额两侧有短纵脊.     

Aristolochia helix sp.nov. (Aristolochiaceae) from Thailand

A new species of Aristolochiaceae, Aristolochia helix , is described from Thailand and contrasted to its nearest ally, A. arenicola.     

A sensitive fluorometric assay for the determination of cathepsin D

A fluorometric assay is described for cathepsin D—determining the tyrosine released by measuring the fluorescence of its nitrosonaphthol coupling product. The advantage of this method is its high sensitivity.     

Electrostatic potentials in membrane systems

A membrane with an arbitrary distribution of fixed charges inside and on its surfaces is considered. A procedure for calculating the local electrostatic potential at an arbitrary point of the system is described and its validity discussed. This procedure is based on the linearization of the 3-dimensional Poisson-Boltzmann equation around an exact 1-dimensional solution.     

荨麻科三新种

该文描述了荨麻科三新种:(1)自中国重庆市发现的荨麻科荨麻属一新种,城口荨麻。此种与异株荨麻有亲缘关系,区别特征为此种的茎被少数刺毛,叶片多为心形,雄、雌花序均不分枝,瘦果在中央稍凹陷。(2)自中国广西发现的荨麻科赤车属一新种,来宾赤车。此种与特产云南东南部的富宁赤车相近缘,与后者的区别在于本种茎的毛开展或向上弯曲,叶片长椭圆形,基部斜楔形,雌花具3~4枚花被片,其中1~2枚较大花被片在背面顶端具一长筒状突起。(3)自缅甸北部发现的荨麻科楼梯草属一新种,克钦楼梯草。此种在体态上与骤尖楼梯草甚为相似,与后者的区别在于本种的每一茎节具正常叶和一退化叶,托叶狭披针状条形和无脉,雌总苞苞片无角状突起,雌小苞片较大,呈楔状长圆形,雌花具一小花被片,以及雌蕊具一宽倒卵球形柱头。     

A new species of Argyrosomus (Pisces, Sciaenidae) from Natal, South Africa

Argyrosomus thorpei sp. n. is described from 11 specimens and compared with its closest relatives A. hololepidotus and A. amoyensis.     

Surgical treatment of the epicanthal fold

A surgical technique is described for the correction of the epicanthal fold. Indications for its use are noted and emphasis is placed on its advantages. The procedure is simple to perform and uniformly gives good results.     

Plate 381. Alocasia nebula

A spectacular new Bornean species of Alocasia , A. nebula A. Hay, is described and illustrated in colour. Notes on its relationships, origin and cultural requirements are provided.     

Estimation of N-amino-N,N-dimethylaminoethanol, choline and their acetate esters by gas chromatography mass spectrometry

A method is described for measurement of choline, N-aminodeanol, and their acetyl esters by gas chromatography mass spectrometry. The preparation of N-aminodeanol and its isotopic variants is also described. This method allows a thorough quantitative analysis of the replacement of true with false neurotransmitter in biological preparations.