KM Matrix Parametrizatidn Convenient for Both Bd Study and Data Analysis

The value of the ε parameter of a pseudoscalar mixing system is phase-conventiondependent. We prove that one can make two of the three ε parameters, ε_K, ε_Bd and ε_Bd, small but not all of them simultaneously by adjusting the phase convention of the Kobayashi-Maskawa (KM) matrix. We give corresponding KM matrices based on the Wolfenstein parametrization, which are also suitable for ahalyzing the values of KM parameters. The transformation from one matrix to the other is extremely simple.     

热处理过程对纳米TiO2结构和性能的影响

以钛酸丁酯为钛源,采用溶胶-凝胶法制备纳米TiO2,结合TG-DTA,XRD,TEM等分析了不同热处理温度对纳米TiO2的晶型结构、晶粒粒径及微观形貌的影响.以甲基橙溶液为目标降解物,探讨了热处理温度对纳米TiO2光催化活性影响.利用Eastman的粒子生长理论对晶粒生长的动力学过程进行初步分析.研究表明:随着热处理温度升高,TiO2粒径逐渐从11.2 nm增大到78.6 nm;热处理温度为450～ 550℃时,纳米TiO2晶粒以锐钛矿为主,温度升至650℃时,出现了锐钛矿和金红石的混合相(质量比A∶R =9∶1),此时晶粒对甲基橙的降解率达到97.75;.而煅烧温度高于850℃后,TiO2几乎完全为金红石相,光催化活性显著下降.50;锐钛矿型TiO2转变金红石型TiO2的温度约为730℃,锐钛矿和金红石相晶粒表观活化能分别18.15 kJ/mol和42.56 kJ/mol;晶粒生长最快温度分别为546℃和1280℃.     

Where is the origin of CP violations?

If experimentally b → c is more suppressed than b → u, the Kobayashi-Maskawa mechanism of CP violation may not work. In the SU (2) × U(1) × S₃ model, which gives all elements of the KM matrix naturally by the quark masses, this is the case and CP violations originate mainly from the Yukawa sector.     

La掺杂TiO2/电气石的制备及光催化性能研究

以电气石为载体,TiCl4为前驱体,采用水解沉淀法负载La掺杂纳米TiO2薄膜,制备La掺杂TiO2/电气石复合材料.结合XRD、FESEM、UV-vis等现代测试手段对所制备样品的结构和性能进行了表征.以甲醛为目标降解物,考察了样品的光催化活性.结果表明:La掺杂TiO2晶粒细小,均匀分布于电气石表面.经550℃煅烧,La掺杂后锐钛矿型TiO2粒径由13.5 nm降为8.73 nm.La掺杂后,TiO2光催化剂的吸收光谱向可见光区发生红移.1m3环境舱内,日光灯下照射360 min,La掺杂TiO2前后复合材料对甲醛的去除率分别达到66.4;和82.2;.     

Renormalization Group Evolution of CP Nonconsewation Measures

We emphasize to use the squared quark mass matrices instead of the quark mass matrices to eliminate the γ5 noninvariant ambiguity. A new measure of CP nonconsewation α is proposed in this framework. It is more underlying than the well-known CP nonconsewation measure J. The renormalisation group analysis for both of them is fulfilled. For this aim, we employ a careful calculation scheme, which avoids obtaining tiny quantity J² from the difference of two large numbers. We find that the CP nonconsewation measure J, contrary to the previous statement, decreases with energy, while another CP nonconsewation measure α increases with energy primarily. The change near the infrared fixed points is substantial.     

Some Possible Effects of the Absorptive Part of Penguin Diagram

The absorptive part of the penguin diagram (APP) is one of the necessary conditions for some CP violation quantities. In this paper, we investigate some possible effects of APP in D^o and B^o systems including isospin asymmetry in the final states and phase shift in parameters, and decay rate difference of D^o and D^o, even though it is hard to observe them in near future and in contrast, this effect does not appear in K-system.     

ARE THERE ANY REALISTIC SU(N) GRAND UNIFIED MODELS CONTAIN IHG FRACTIONALLY CHARGED PARTICLES?

We have completed a systematic searching for realistic SU(N) grand particles. unified models containing fractionally charged The principles of constructing realistic models are originated from Georgi's with some changes on account of fractionally charged particles. We conclude that there are not any realistic models containing fractionally charged particles.     

A MODEL NATURALLY INCLUDING BOTH LIGHT MAGNETIC MONOPOLES AND FRACTONS

In this paper we studied the multi-scale symmetry breaking for unification model SO(10)×SO(5) probably including both light monopoles and fractons. It is found that for the given value of Weinberg angle, the mass of monopole is upper-bounded and the relation between the mass of monopole and the coupling constant of SO(5) is obtained.     

Sol-gel synthesis of nanoscaled TiO2 and effect of nanoscaled TiO2 on degradation performance of direct pink 12B

Russian Journal of Applied Chemistry - In this paper, nanoscaled titanium dioxide (TiO2) was synthesized through sol-gel method by using butyl titanate as precursor. The optimized TiO2 was obtained...     

水介质中二甲基姜黄素脂质体对金属离子的荧光识别

通过薄膜分散法制备二甲基姜黄素(ASC-J9)脂质体,其粒径分布均匀且在水中的分散效果好,平均粒径为145. 7 nm,分散系数为0. 361。将ASC-J9脂质体作为水溶性的荧光探针,通过荧光猝灭法可选择性识别Fe~(3+)、Fe~(2+)及Cu~(2+)。经过条件筛选得到最佳荧光测试条件为:ASC-J9脂质体浓度为5. 0×10~(-5)mol/L,平衡时间5 min,测试温度25℃。由Job's曲线和荧光滴定结果判断该探针与Fe~(3+)和Cu~(2+)的络合比均为1∶1,与Fe~~(2+)的络合比为2∶1; Stern-Volmer方程判断该荧光猝灭类型为静态猝灭,结合常数分别为KFe(Ⅲ)=9. 63×10~4L/mol,KFe(Ⅱ)=3. 65×10~5L/mol,KCu(Ⅱ)=2. 32×10~5L/mol;该识别体系检测快速、灵敏度高,对Fe~(3+)、Fe~(2+)、Cu~(2+)的线性范围分别为:5. 0×10~(-7)~3. 0×10~(-5)、5. 0×10~(-7)~1. 75×10~(-5)、5. 0×10~(-7)~2. 5×10~(-5)mol/L,检出限分别为6. 41×10~(-7)、3. 28×10~(-7)、5. 08×10~(-7)mol/L。