CP破坏的物理根源

本文介绍了几个重要的CP破坏模型,讨论了它们的成功之处和所存在的问题,结合CP破坏研究的现状,提出几点展望。     

Synthesis and property of imidazolium oxidative-thermoregulated ionic liquids

A series of novel imidazolium oxidative-ther- moregulated bifunctional ionic liquids （ILs） have been synthesized by introducing the thermoregulated structural unit into imidazolium cation and using heteropolyanion as the anion of ILs. The structures of these new type of taskspecific ionic liquids （TSILs） are characterized by FT-IR and 1H NMR. The thermostability of ILs is analyzed by thermogravimetry. The thermoregulated properties of ILs in aqueous and organic solvents are mainly investigated. These ILs have the corresponding cloud points （CPs） in aqueous. The effects of IL concentration, polymerization degree, inorganic additives and organic additives on the CP are studied. IL/DMF/n-heptane or n-octane biphasic system has the corresponding critical solution temperature （CST）, and has the feature of ＂homogeneous at high temperature, heterogeneous at low temperature＂. The effects of IL dosage and polymerization degree on the CST are given. IL/DMF/n-octane thermoregulated biphasic system has been successfully applied for catalytic oxidative desulfurization of model fuels. This study opens up a new way for catalytic oxidation to achieve an integration of homogeneous catalysis and heterogeneous separation.     

肉鸭0～2周龄基础日粮优化配方研究

根据日粮中代谢能（ME）、粗蛋白质（CP）含量,试验设置7个组。用计算机优化出7套基础日粮配方。将840只1日龄仙湖3号瘦肉型鸭商品代健雏随机均分为7组,进行饲养试验与代谢试验,观察各组肉鸭的生长速度、饲料报酬、单位增重饲料成本、成活率、能量代谢率、粗蛋白质净利用率等性状。结果显示：本试验设置的第1,3组基础日粮配方均是肉鸭0-2周龄基础日粮优化配方。     

Light and Heat Induced Denaturation of Photosystem Ⅱ Core Antenna Complex CP47

Light and heat induced denaturation of CP47, the core antenna complex of photosystem Ⅱ purified from spinach, were investigated using absorption and circular dichroism spectra.Light caused the destruction of chlorophyll a and excitonic interaction of chlorophyll a in CP47, while the protein secondary structure was not apparently changed.Heat induced the destruction of protein secondary structure and excitonic interaction of chlorophyll a, but the chlorophyll a molecule was not damaged.The results suggest that both the chlorophyll a molecular structure and the protein native conformation are necessary for excitonic interaction of chlorophyll a and the energy transfer function of the chlorophyll a binding protein.     

G5作用下的上同调复射影空间

文献［１］作者讨论了Ｇ３作用下的上同调复射影空间Ｍ２ｎ,笔者主要考虑Ｇ５作用下的上同调复射影空间Ｍ２ｎ,证明文献［２］中提出的２个猜想当ｎ＝５和ｎ＝７时是正确的．定理１　（Ａ）若Ｄ５（Ｍ１０）≠,则Ｄ５（Ｍ１０）＝｛１｝;（Ｂ）若ＤＥ５（Ｍ１０）≠,则ＤＥ５（Ｍ１０）＝｛（１;５,０）｝．该定理即为Ｇ５作用于上同调复射影空间Ｍ１０的结果．对（Ａ）其证明需分ｄ＝１,ｄ≠１两种情况,对ｄ＝１笔者引用了文献［２］中定理１．３;对ｄ≠１,用穷举法分Ｃ１６×Ｃ１４＝２４种情况讨论．在（Ａ）的基础上证明…     

DFO对心肌细胞铁代谢的影响

观察去铁胺(DFO)对原代培养的心肌细胞铁代谢的影响,探讨DFO对心肌细胞铁代谢的影响机制.用原代培养的乳鼠心肌细胞为材料,以不同浓度的DFO孵育细胞,然后检测心肌细胞存活率、搏动频率以及铁转运相关蛋白CP,HP,FP1的表达变化.结果表明:各剂量DFO对心肌细胞存活率无明显影响;心肌细胞搏动频率减慢,停止跳动的细胞数量明显增加,收缩幅度逐渐降低;随着DFO浓度的增加,心肌细胞CP和HP的表达增加而FP1表达减少.由此可以看出,DFO不影响心肌细胞的存活率,但影响细胞的生活状态,也影响心肌细胞内CP,HP和FP1蛋白的表达.     

光系统核心天线CP43, CP47 中b-Car 与Chl a分子间的能量传递

以纯化的核心天线ＣＰ４３和Ｃ灾材料产荧光激发光谱比较的方法,计算出在３和ＣＰ４７中β－Ｃａｒ到Ｃｈｌａ分子之间的能量传递效率分别为２９．１％和６２．８％,证明了在常温下,ＣＰ４３和Ｃ宫都存在着β－Ｃａｒ到Ｃｈｌａ分子之间的能量传递,为期人能量传递可能以“Ｄｅｘｔｅｒ的电子交换机制”进行,还对ＣＰ４３和ＣＰ４７中β－Ｃａｒ和Ｃｈｌａ分子之间的空间位置关系进行了讨论。     

CP破坏与超对称模型

分析CP破坏与超对称模型,然后由超对称模型出发,认为u.d夸克有两类反夸克:F erm i型和B ose型反夸克,质子P F 1也有两类反质子P -F 1及P -B 1,且P -B 1=P -F 1 3 lS0,F([q1q2]g).当P F 1P -B 1对湮灭时,只有P -B 1中的P -F 1与P F 1被湮灭而转化的光子,l0S,F([q1q2]g)组分将被保留下来.q1,q2,g等亚夸克都只是正物质的组分.因此,宇宙中正物质应多于反物质.     

微扰QCD框架下B~(0,±)→π~(0,±)π~+π~-衰变过程中的直接CP破缺

在微扰QCD框架下,研究了B~(0,±)→ρ~0(ω)π~(0,±)→π~+π~-π~(0,±)衰变过程中ρ-ω混合效应对CP破缺的影响.由于产生了大的强相角,当π+π-的不变质量在ω共振区域,CP破缺获得了极大增强.     

最小超引力模型中新物理对Bu,d和Bs介子双粲衰变过程的影响

在最小超引力模型中计算新物理对Bu,d和B,介子衰变过程的贡献.结果发现:①新物理对-B0d→D(*)+D(*)-,B-u→D(*)0D(*)-和-B0s→D(*)s+D(*)-衰变过程分支比的贡献最大为30%;②这些过程的直接CP破坏很小,而混合CP破坏很大,超对称对其CP破坏贡献很小,基本可以忽略;③这些衰变过程的分支比和CP破坏的理论预言的主要误差来源于形状因子.