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The aim is to infer the phylogenetic relationships of Galerucella and outgroup Phaedon brassicae Baly beetle species (Coleoptera: Chrysomelidae) and to discuss the relation between the evolution of Galerucella and host plant.

本文目的是通过对小萤叶甲属部分种类的线粒体COⅠ基因进行比较,探讨小萤叶甲属昆虫进化与寄主植物之间的关系,同时对几种分类地位模糊的昆虫进行分析和归类。

Result and Conclusion :All of them and their different dosages were effective to control conidia of Peronospora arborescens.

结果和结论:室内药效测定结果表明不同浓度的供试药剂均能使孢子囊出现畸形,其中以普力克对孢子囊的致畸能力最强,甲霜铜、甲霜铝铜和靠山对孢子囊的致畸能力较弱。

Recording electrode was placed on the scalp near the olfactory bulb. Results Electrically evoked olfactory potentials composed of triphasic negative-positive-negative peaks, named N1, P1, N2 respectively, were detected on the olfactory region. The latencies of N1, P1, N2 were 16.27ms, 25.36ms, 49.75ms respectively in cribriform plate.

结果 电极置于筛板和鼻甲嗅区粘膜可记录到一组&负-正-负&三相的诱发电位波,依次命名为N1、P1、N2,当刺激强度为2.0 mA时,筛板粘膜诱发电位的潜伏期分别为16.27、 25.36、 49.75 ms;鼻甲嗅区粘膜诱发电位的潜伏期为20.29、31.31、 46.83 ms。

The results show that the foamable MAA/MAN copolymers were prepared at 40-60℃ by polymerizing the mixture of 50phr MAA, 50phr MAN, 1-5phr magnesium oxide, 2-8phr butanol and tert-butanol, 0.2-0.3 phr dibenzoyl peroxide and tert-butyl perbenzoate and 0.1-0.2phr DMF. Then the resulting copolymers were expanded at 200-220℃ for 2-3h, subsequently treated at 160℃ for 5-6h, generating PMI foams with excellent mechanical properties and heat-resistance.

研究结果表明:将50份MAA、50份MAN、1~5份氧化镁、2~8份正丁醇、叔丁醇的混合物、0.2~0.3份过氧化二苯甲酰和过氧化苯甲酸叔丁酯和0.1~0.2份的甲酰胺,混合均匀后在40~60℃聚合为可发泡的MAA/MAN共聚物,该共聚物在200~220℃下发泡2~3h,在160℃下热处理5~6h,制得PMI泡沫塑料,其力学性能和耐热性能优异。

With the aim of enhancing the nonlinear optical property of poly, poly[(thiophene-2,5-diyl)p-(N,N-dimethylamino) azobenzylidene] is prepared from 4-aldehyde-4'-dimethylamino azobenzene and thiophene through condensation polymerization reaction.

为了提高聚噻吩甲烯的非线性光学性能,通过4-醛基-4'-二甲胺基偶氮苯和噻吩的缩聚反应,合成了聚噻吩对二甲氨基偶氮苯甲烷,再用PTDMAAB与四氯苯醌发生脱氢反应合成了侧链含偶氮的聚噻吩甲烯。

The optimum process starting from 1,3-dihydroxyacetone and formamidine acetate was: 22.54g(0.25mol) 1,3-dihydroxyacetone, 29.12g(0.28mol) formamidine acetate and 120ml isopropanol in liquid ammonia was heated to 40℃ for 8h.

以1,3-二羟基丙酮和醋酸甲脒为原料的较佳工艺:1,3-二羟基丙酮22.54g (0.25mol),醋酸甲脒29.12g (0.28mol),异丙醇120ml,通入液氨,40℃反应8h,减压蒸馏除去反应液中的氨气后过滤,滤液加至热的苦味酸饱和溶液,自然冷却至室温,制得4(5)-羟甲基咪唑苦味酸盐69.5g,收率85.0%。

The chain-forming dinoflagellate Gymnodinium catenatum was only one species in Gymnodinoid known that produces paralytic shellfish poison which had a negative impact on marin environment,aquaculture and human health.

中文摘要有害赤潮生物链状裸甲藻是唯一能产生麻痹性贝类毒素的裸甲藻,其产生的毒素给海洋环境、渔业及人类健康带来了严重的危害。

Objective To explore the impact on endoscopic sinus surgery by middle turbinate hypothermy plasma for treating the patients who had chronic sinusitis.Methods Forty cases of sinusitis were retrospectively analyzed. All had undergone endoscopic sinus surgery with middle turbinate hypothermy plasma.

目的 探讨中鼻甲低温等离子消融在慢性鼻窦炎鼻内窥镜手术治疗中的作用方法回顾分析40例中鼻甲行低温等离子消融的鼻内窥镜手术的临床资料。

Salicylic acid in concentrations of 0.5% to 2% is a keratolytic found in many OTC acne products.

这些商品中最普遍的成分是浓度为10%以上的过氧化苯甲酰(许多昂贵的痤疮广告产品包含过氧化苯甲酰,但并不比一般的痤疮商品来得有效)。

AM1 method was employed to calculate ΔHOF values of methoxyl phenols, and the values were used as theoretical parameters to investigate the stabilizing effect of p-type lone pair electrons of methoxyl oxygen on the phenoxyl free radicals.

用AM1方法计算了几种甲氧基苯酚的ΔHOF值,以此为理论指标探讨了甲氧基氧的p型孤对电子对苯氧自由基的稳定作用。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力