有机钴胺素的合成及光谱研究

本文使用Schrauzer法合成了多种有机钴胺素,测定了紫外-可见吸收光谱,提出了判断有机钴胺素生成的光谱证据。     

Behavior of argon gas release from manganese oxide minerals as revealed by <Superscript>40</Superscript>Ar/<Superscript>39</Superscript>Ar laser incremental heating analysis

Manganese oxides in association with paleo- weathering may provide significant insights into the multiple factors affecting the formation and evolution of weathering profiles, such as temperature, precipitation, and biodiversity. Laser probe step-heating analysis of supergene hollandite and cryptomelane samples collected from central Queensland, Australia, yield well-defined plateaus andconsistent isochron ages, confirming the feasibility dating very-fined supergene manganese oxides by 40Ar/39Ar technique. Two distinct structural sites hostingAr isotopes can be identified in light of their degassing behaviors obtained byincremental heating analyses. The first site, releasing its gas fraction at thelaser power 0.2-0.4 W, yields primarily 40Aratm, 38Aratm, and 36Aratm (atmospheric Ar isotopes). The second sites yield predominantly 40Ar* (radiogenic 40Ar),39ArK, and 38ArK (nucleogenic components), at ～0.5-1.0 W. There is no significant Ar gas released at the laser power higher than 1.0 W, indicating the breakdown of the tunnel sites hosting the radiogenic and nucleogenic components. The excellent match between the degassing behaviors of 40Ar*, 39ArK, and 38ArK suggests that these isotopes occupy the same crystallographic sites and that 39ArK lossfrom the tunnel site by recoil during neutron irradiation and/or bake-out procedure preceding isotopic analysis does not occur. Present investigation supports that neither the overwhelming atmospheric 40Ar nor the very-fined nature of the supergene manganese oxides poses problems in extracting meaningful weathering geochronological information by analyzing supergene manganese oxides minerals.     

论服装科学性与艺术性的和谐统一

研究了国内服装生产供应链体系中存在问题与应对措施．从服装科学性与艺术性的表现形式入手，借用服装人体工效学和供应链管理协调策略相关理论，分析了国产服装供应链中存在的零和博弈等问题．提出了要在服装的设计、生产及销售的整个供应链体系中实现服装产品科学性与艺术性的和谐统一，就必须以数量化情报形式来为创造者服务，要充分考虑到“人-服装-环境”系统的最佳匹配．     

甘肃少数民族聚居区学校体育课程资源的开发与利用

对甘肃少数民族聚居区学校体育课程资源的现状进行了调查分析,提出了开发利用的构想及对策,目的是为民族贫困地区中小学的体育课程改革提供理论依据.     

重穗型杂交稻的产量及一些生理生化特性研究

以18个不同穗重型籼稻品种为材料，研究了重穗型杂交稻的产量及一些主要的生理生化特性。结果表明，重穗型杂交稻具有更高产量潜力，其高产主要依赖于大“库”、籽粒的正常充实使单穗重大幅度提高。后期LAI的适当降低、高效叶面积率的增加、根、叶不早衰和净光合速率的提高是其“源”足的主要因素。齐穗后重穗型杂交稻剑叶的净光合速率明显高于中、轻穗型品种的机理是剑叶Rubisco活性的提高及叶绿素含量的增加；具有在高、低光强、高温和低CO2浓度下对C02有较强的同化能力的优势，光合“午休”现象较轻，能保持较高的净光合速率，显示其对环境有较强的适应性；气孔性状优良、气孔开度积（单位面积上的气孔密度乘以其气孔开度）大也是重穗型杂交稻净光合速率高的重要气孔因素。重穗型杂交稻抽穗后物质积累优势明显，且茎鞘物质向穗部的转运量、转运率和转化率也均远高于中、轻穗型品种。     

金属离子对棉铃虫N-乙酰-β-D-氨基葡萄糖苷酶活力的影响

研究了金属离子对棉铃虫N-乙酰-β-D-氨基葡萄糖苷酶（EC3．2,1．52）活力的影响．结果表明：Na^＋、K^＋和Li^＋等金属离子对酶活力没有任何影响；在指定范围内，Mg^2＋和Ca^2＋对酶活力影响不显著；Zn^2＋、Cu^2＋和Al^3＋对该酶有不同程度的抑制作用．进一步研究Cu^2＋和Al^3＋的抑制作用动力学，结果表明：Cu^2＋对该酶的抑制作用是一种可逆过程，抑制机理表现为混合型，抑制常数Kt为0．23mmol／L，K1s为1．49mmol／L．Al^3＋对该酶的抑制作用是一种可逆过程，抑制机理表现为竞争性类型，抑制常数Kt为6．42mmol／L．     

Secondary instabilities of linearly heated falling films

Secondary instabilities of linearly heated failing films are studied through three steps. Firstly, the analysis of the primary linear instability on Miladinova's long wave equation of the linearly heated film is performed. Secondly, the similar Landau equation is derived through weak nonlinear theory, and a two-dimensional nonlinear saturation solution of primary instability is obtained within the weak nonlinear domain. Thirdly, the secondary (three-dimensional) instability of the two-dimensional wave is studied by the Floquet theorem.Our secondary instability analysis shows that the Marangoni number has destabilization effect on the secondary instability.     

水平注水井与直井联合井网见水时间研究

为了寻求一种简单、有效的计算水平注水井与直井联合井网的见水时间的方法,将水平井简化为具有等效井筒半径的直井,考虑水平井与直井联合布井水驱油的非活塞性,运用等值渗流阻力法将渗流区划分为3个阻力区,推导出了五点法、七点法和九点法水平井与直井联合井网的油井见水时间的计算公式和修正公式。计算结果表明,井网的见水时间随水平井长度的增加而缩短;相同的井距和生产条件下,五点法井网的见水时间要长于九点法和七点法井网;随水平井与水平方向夹角的增大,五点法井网的见水时间缩短,七点法井网的见水时间先增加后缩短,九点法井网的见水时间增加;油藏和流体参数对井网见水时间影响不大。     

硬壁狭缝中硬球流体的密度泛函理论研究

用Rosenfeld密度泛函理论对由两平行硬墙约束的硬球流体系统进行了研究,计算了不同墙距离之间硬球流体的密度分布。结果表明,靠近狭缝,硬球流体的密度最大;在距硬壁一个分子直径附近也出现一个密度极大值;在两硬壁的中间位置,流体的密度较小且变化平缓。虽然该研究采用的模型及研究对象与前人有所不同,但计算结果与文献中的蒙特卡罗模拟结果基本一致。     

丹皮酚及其衍生物的性质研究

从有机胂的角度出发,结合丹皮酚的抗炎、活血和抗肿瘤等特性,合成了一系列的有关丹皮酚和有机胂的衍生物,均为创新化合物;采用正交实验和方差分析对合成化合物的条件进行了探讨,同时对丹皮酚的提取条件进行了优化研究;以创新化合物对人肝癌细胞株HepG2细胞的抗肿瘤活性进行了筛选,获得效果较佳的化合物和最佳的试验浓度,通过对HepG2细胞生长抑制实验、诱导HepG2细胞凋亡分析及机制等的探讨,探索了一类结构简单、较低浓度下可以诱导体外及体内肿瘤细胞凋亡,而对正常细胞影响较小的新型有机胂药物.