男子柔道运动员6周减体重期神经肽水平变化的研究

目的:测定男子柔道运动员6周减体重实验中与能量平衡有关的食欲素A、瘦素和神经肽Y水平变化。方法:限制饮食进行训练,并以血乳酸作为监控标准。结果:运动员平均体重下降4.14±1.54 kg或下降5.8%;血清食欲素水平从第2周开始持续高于实验前,并显著高于对照组;血清瘦素水平从第2周开始持续低于实验前,并显著低于对照组;血浆神经肽Y水平未见变化,但有上升趋势;运动员血清睾酮、血清皮质醇水平和睾酮/皮质醇比值未见明显改变。结论:6周的减体重过程中机体机能能力未受影响,运动员体重的下降可能是通过食欲素A和瘦素等诸多神经肽对能量平衡的作用而实现的,这对探索优秀运动员减体重工作中具有启示意义。     

Eu3+摩尔浓度对Y2O2S:Eu3+结构及发光性能的影响

采用硫熔法制备了系列Y2O2S：Eu^3＋x（0.02≤x≤0.10）红色蓄光材料基质。X射线衍射（XRD）结果表明：所制样品均属六方晶系;由于Eu^3＋离子半径比Y^3＋离子半径略大,故其晶胞参数a和c随着Eu^3＋摩尔浓度的增大而逐渐增大。在340nm激发下,随着Eu^3＋摩尔浓度的增大,I626/I539逐渐增大,而I626/I596基本保持不变。这主要是由于Eu^3＋的5D2和5D1等高激发态能级之间发生浓度淬灭引起的。     

广西半蒴苣苔属（苦苣苔科）一新种——红苞半蒴苣苔

报道了在广西发现的苦苣苔科半蒴苣苔属Hemiboea一新种，即红苞半蒴苣苔H. rubribracteata Z. Y. Li & Yan Liu。该新种叶形与贵州半蒴苣苔H. cavaleriei Lévl.相近，不同在于茎较粗且坚硬，总苞红色，萼片较长，花冠外面白色，无毛，下唇3裂至中部。     

梾木属的一新亚属——华茱萸亚属

Cornus L. s. 1. is a large polytypic genus. The classificantion of which has been so different that some authors recognize several separate genera, while others treat them as ei- ther subgenera or sections.  New evidence from many disciplines such as palynology, cyto- logy, wood anatomy and embryology supports the view that the genus should remain in the broad sense.  I basically agree with the treatment by Ferguson (1966b) before my finishing a comprehensive study on Cornus L. s. 1. except for supporting  the separation  of subgenus Afrocrania as an independent genus.  A new subgenus Sinocornus Q. Y. Xiang, containing one species, C. chinensis Wangerin, is established here on account of its inflorescence axillary and different from the other members of the genus which all have terminal inflorescences only. The inflorescence developed from a terminal bud implicates the sympodial nature of axis of stem and the one from an axillary bud the monopodial one.   It is reasonable to regard the character as of subgeneric value.  Also a new combination, Cornus subgen. Syncarpea (Na- kai) Q. Y. Xiang, is proposed here as a substitute for Cornus subgen.  Benthamia (C. B. Clar- ke) Schneider used for a long time.  Because the valid publication of the former name subgen. Syncarpea Nakai is earlier than the latter one.  The types of inflorescences of 8 subgenera re- presented by type or selected species are illustrated.     

试析“不X不Y”格式

本文从描写语言事实入手，按“小三角”的研究思路，从结构成分，语义类型，语用价值三个角度对“不X不Y”结构，作了较全面的考察，从结构成分来看，能够嵌入“不X不Y”结构的“X、Y”一般是单音节，也有双音节乃至多音节，“不X不Y”结构构成两个停顿，两个停顿前后之前表并列，表因果或表假设关系。