囟土白蚁蚁后卵巢管数量、蚁巢体积与蚁群中各蚁型数量的相关性

囟土白蚁Odontotermes fontanellus Kemner是安徽为害林木、水库堤坝的主要蚁种.研究结果表明:1.在一定的巢龄范围内,随着蚁后身体增长,卵巢管数量增多,一侧的卵巢管最多可达3726条.2.蚁后体长与工蚁数、兵蚁数、幼蚁数、整巢蚁数之间成幂函数关系.3.卵巢管数与蚁后体长、工蚁数、兵蚁数、幼蚁数、整巢蚁数之间成幂函数关系,4,蚁巢体积(y)与蚁后体长(X₂)、兵蚁数(X₄)、的关系式为:y=6.687e^0.0566X₂+0.6741X₄     

两种品系油菜植株成分与蚜虫种群消长及成蚜翅型的关系

本文研究两种品系油菜植株成分与桃蚜(Myzus persicae(Sulzer))、萝卜蚜(Lipaphis erysimi(Kaltenbach))的种群消长及成蚜翅型的关系.经分析得出如下结果:1.桃蚜种群消长与苏氨酸、赖氨酸、组氨酸、丙氨酸、硬脂酸等含量有关;桃蚜成蚜无翅率与精氨酸、谷氨酸、酪氨酸、异亮氨酸等含量有关.2.萝卜蚜种群消长与苏氨酸、蛋氨酸、异亮氨酸、苯丙氨酸、酪氨酸、含水量有关;萝卜蚜成蚜无翅率与含水量.亚麻酸.苏氨酸、油酸,天门冬氨酸、丝氯酸、亚油酸等含量有关.     

Evidence that the G1-S and G2-M transitions are controlled by different cdc2 proteins in higher eukaryotes.

Xenopus eggs contain two distinct cdc2 homologs of 34 and 32 kd. We show that the 32 kd cdc2 protein, like the 34 kd protein, is a kinase. However, unlike the 34 kd homolog, the 32 kd cdc2 kinase activity does not decrease dramatically at the end of mitosis. The 32 kd protein does not associate with mitotic cyclins B1 and B2 but does associate with cyclin A and a novel doublet of proteins of 54 kd that may regulate its activity. We also show that depletion of the 32 kd cdc2 homolog from a Xenopus extract blocks DNA replication, but does not inhibit entry into mitosis. By contrast, depletion of the 34 kd cdc2 homolog or absence of mitotic cyclins from an extract does not inhibit replication, but does block entry into mitosis. Our results indicate that in higher eukaryotes, DNA replication (G1-S) and mitosis (G2-M) may be controlled by distinctly different cdc2 proteins.     

On-line thermal monitoring of aspartic acid separation in a high voidage ion-exchange column at high flow rate

A simple thermal monitoring technique has been successfully applied to an adsorption system using a novel ion exchanger with a large internal void volume (voidage) which can be operated at high superficial velocity (SV). Temperature changes resulting from heats of adsorption could be followed effectively using semi-conductor thermistor devices inserted into the resin through the column wall. Results show that, despite the high feed rates adopted, the thermal signals generated can be consistently related to the position of the breakthrough front within the bed.     

青海禽棒恙螨属一新种：蜱螨亚纲：恙螨科

本文记述从朱雀Garpodacus erythrinus(Pallas)体上采到的禽棒恙螨属Ornithogastia Vercammen-Grandjean,1960,一新种,朱雀禽棒恙螨Ornithogastia erythinae sp.nov.标本采自青海省海南藏族自冶州贵南县。     

四川鱼类寄生吸虫一新种：（复殖目：尾孔科）

本文记述了尾孔科吸虫一新种——平睾尾孔吸虫,新种Urotrema parallelorchis sp.nov.。新种采自短身间吸鳅和犁头鳅的肠道。新种的睾丸左右排列而不同于该属的所有已知种。     

寄生云杉树蜂的枝跗瘿蜂一新种(膜翅目:瘿蜂总科:枝跗瘿蜂科)

枝跗瘿蜂科(Ibahidae)是个小科,所有种类均寄生蛀干害虫树蜂科(Siricidae)的幼虫。我国大陆的本科种类由杨忠岐1991年首次作了报道。现记述采自祁连山林区的另1新种。该种寄生于为害青海云杉(Picea crassifolia Kom.)的黄肩长尾树蜂(Xeris spec-trum spectrum)等树蜂的幼虫。新种的模式标本保存于西北林学院天敌昆虫研究室。至此,我国大陆共有本科种类3种,加上台湾的1个种,我国共有4种: