Aspects of the biology of a population of the cosmopolitan brittlestar Amphipholis squamata (Echinodermata) from the Firth of Forth,Scotland

In the Firth of Forth, Amphipholis squamata has continuous brooding, and pulsed breeding and recruitment, with highest numbers of brooded embryos and newly released juveniles occurring in the summer months. The estimated size of maturity was 1·5 mm disc diameter although the majority of reproductive output came from individuals of between 2·00–2·99 mm disc diameter. Brittlestar size and season had significant effects on embryo production. Embryos of different developmental stages were present in the bursae of the same individual, and newly spawned embryos and those of a potentially releasable size were present each month. The majority of juveniles apparently emerge at a disc diameter of between 0·8–1·2 mm.

Brittlestars were found with full stomachs throughout the year but a peak of feeding was recorded during summer when growth and seawater temperatures were highest. Stomach analyses indicated that almost all animals (99·4%) ingest fine particulate matter but a relatively wide range of plant and animal food items was also identified. Approximately 3% of this Scottish population of A. squamata was infested by the ectoparasitic copepod Cancerilla tubulata.     

X…Y(X=LiF,H3N,H2O; Y=HF,LiF)复合物中锂键、氢键的理论计算

在CCSD(T)/cc-pVTZ水平下,对X…Y(X=LiF,H3N,H2O; Y=HF, LiF)复合物的9个结构进行几何构型优化和红外振动频率计算. 根据定域化分子轨道、原子自然电荷、Wiberg键级的分析表明HFLiF分子中的H-F键是共价键, 而Li-F键则为离子键而非共价键. H3N…Y (Y=HF,LiF)、H2O…Y (Y=HF,LiF)中的氢键或锂键源于静电相互作用, 并非共用电子的共价键. 结合能的计算表明: 与HF相比, LiF与X (X=LiF, H2O, NH3)的结合能更高;结合能从高到低依次为 LiF > NH3 > H2O. 红外振动频率分析表明HF与NH3、H2O形成红移氢键,即 H-F键长增加, 相应的H-F伸缩振动频率降低. H3N…LiF的Li-F键键长增加同时伸缩振动频率减少. 而LiF与H2O形成锂键后,键长增加0.016 ?,而Li-F的伸缩振动频率反而增加了2 cm-1 , 即蓝移锂键.     

非正交定域分子轨道的研究(Ⅰ)─非正交定域分子轨道及其量子化学处理

本文应用投影算子方法，放弃了正变化条件的限制，成功地将ＣＨ４、Ｃ２Ｈ６、Ｃ２Ｈ４、Ｃ２Ｈ２分子的正则分子轨道实现了最佳定域化。借助所定义的非正交定域分子轨道的伴基，对非正交定域分子轨道进行了量子化学处理，推导出具有加和特性的电子Ｆｏｃｋ能量及电荷密度分布公式．并计算了键轨道电荷，所得结果与杂化轨道理论结果一致，为在非正交定域分子轨道基集下，计算力学量算符的平均值和电荷分布，以及研究分子的化学键电子结构和分子光谱问题，提供了简易可行的方法。     

The effect of surgery and anesthetic agents on granulocyte-chemiluminescence in whole blood

Summary The effect of anesthesia and major abdominal surgery on zymosan-induced chemiluminescence (CL) of neutrophil granulocytes was evaluated. CL was measured in diluted whole blood taken at distinct intervals within the perioperative period. In addition, blood samples from healthy volunteers were supplemented with ether and halothane to investigate the in vitro effect of these agents. The phagocytosis-induced CL was not found to be depressed by anesthesia and surgery. Only at supranarcotic concentrations was CL reduced. Surgery and anesthesia, therefore, do not appear to impair this defense system significantly under the conditions of this investigation.     

宋代开封体育文化研究

宋代开封古老独特的体育文化活动有蹴鞠、马球和驴球、水秋千、争标和水球等,它们具有稀有性、奇特性、节令性、地域性等显著特征及较高的历史文化价值和艺术欣赏价值。对宋代开封部分体育文化项目进行研究与开发,可以丰富开封旅游产品的内容,增进区域体育文化交流,彰显开封宋代古都文化魅力,促进开封旅游业乃至相关文化产业群的发展,推动开封宋都古城复建。     

关于现行票据贴现制度的探讨

就现行应收票据贴现处理过程中存在的不合理之处,即银行取得贴现利息的会计期间归属、带有追索权与不带追索权时的账务处理、贴现利息计算中存在的问题进行了探讨,并提出了相关建议。     

社会转型时期中国民主党派的新特点

21世纪初叶,中国已步入社会转型时期,躬逢其时的中国民主党派出现了新变化,在政党的社会基础、价值取向和政党职能等方面呈现出新特点。民主党派的社会基础由公众知识分子嬗变为一般的脑力劳动者,其政党成员的价值取向呈现多元化趋势,政党职能也发生了变化。     

高龄患者腹腔镜阑尾炎切除术疗效分析

目的探讨高龄患者行腹腔镜阑尾切除术(la)的并存疾病的围手术期处理。方法回顾性分析2000年4月～2005年12月间行la的70岁以上高龄患者154例临床资料。结果154例中伴1种以上合并症者114例,完成la130例,中转24例。术后发生各种并发症19例,均治愈,无死亡病例。结论高龄患者阑尾疾病在术前重视并存疾病的治疗、术中及术后监测的基础上la更能显示其创伤小、恢复快的优越性,是高龄患者安全可靠的手术方法。     

用赞赏的眼光去看待玛蒂尔德

多年来 ,人们对莫泊桑的《项链》中的女主人公玛蒂尔德的看法贬多于褒 ,评论者给她定性为爱慕虚荣、追求享乐的小资产阶级妇女形象。这样的判定是不够妥贴和全面的。评价一个人 ,不能用静止的眼光 ,而应该用发展的眼光着重看其纵向的变化。因此 ,玛蒂尔德在丢失项链之后 ,所表现出的诚实善良、坚强不屈、坚韧不拨的品质更值得我们赞赏     

一类DNA生物化学反应的时滞分析

建立了一个具有时滞效应的DNA生物化学反应,研究此模型的定性性质.得到由时滞引起反应周期震荡现象.