测定异常散射因数的强度比法

本文对测定异常散射因数的强度比法做了考察,并用这种方法较好地测定了GaAs中Ga原子在其K吸收限附近的异常散射因数,对该方法在使用中遇到的问题,进行了处理和讨论。 关键词：     

POLYAMINOACIDS AS BIOMATERIALS

This paper surveys the author's, investigations on block-, random-, and oligo-polyaminoacids as materials with potential towards their biomedical applications. Theoretical considerations are made on the formation of novel microheterophase structures as revealed by peptide-elastomer-peptide type block copolymers, and their mechanical and dynamic mechanical behaviors of the mem-     

CELLULAR BINDING OF HEMATOPORPHYRIN DERIVATIVE IN HUMAN BLADDER CANCER CELL LINES: KK-47

Abstract— The fluorescence lifetime and degree of fluorescence polarization of hematoporphyrin derivative (HpD) have been investigated using different solutions: organic and micellar solutions. Ham's F12 medium, and KK-47 cell suspension. The lifetime and polarization degree in organic and micellar solutions did not change with increasing incubation time, but the polarization degree in the cell suspensions temporarily increased at the initial incubation time and then decreased 4 h after incubation. The lifetime in the cell suspensions exhibited a bi-phasic exponential decay. The results obtained suggested that mainly dimeric HpD may bind weakly to the cell membrane, and then slowly be distributed throughout the cytoplasm. The polarity and viscosity of the intracellular loci containing HpD were evaluated from the fluorescence polarizations of HpD in MeOH-H₂O mixtures and ethylene glycol(EG)-MeOH mixtures. The dielectric constant and viscosity of the loci containing HpD were 35 and 11 cp, respectively. Accordingly, the intracellular location of HpD were considered relatively hydrophilic loci of the cells.     

Laser-driven electron beam and radiation sources for basic,medical and industrial sciences

To date active research on laser-driven plasma-based accelerators have achieved great progress on production of high-energy, high-quality electron and photon beams in a compact scale. Such laser plasma accelerators have been envisaged bringing a wide range of applications in basic, medical and industrial sciences. Here inheriting the groundbreaker’s review article on “Laser Acceleration and its future” [Toshiki Tajima, (2010)],¹⁾ we would like to review recent progress of producing such electron beams due to relativistic laser-plasma interactions followed by laser wakefield acceleration and lead to the scaling formulas that are useful to design laser plasma accelerators with controllability of beam energy and charge. Lastly specific examples of such laser-driven electron/photon beam sources are illustrated.     

A theoretical study of transition metal hydroxides: CuOH,AgOH and AuOH

Calculations have been performed on the transition metal hydroxides CuOH, AgOH, and AuOH using SCF and the coupled-cluster with singles, doubles, and perturbative triples (CCSD(T)) methods. The relativistic effect was included in the third-order Douglas—Kroll approximation. Equilibrium geometries, dissociation energies, vibrational frequencies, and dipole moments are reported for the ground state of each species. The relativistic stability of the valence s orbital weakens the ionic character and strengthens the covalent character of the metal—OH bond. For CuOH and AgOH the calculated results show good agreement with available experiment. The anomalous behaviour of AuOH is discussed from the relativistic point of view.     

由透射波的摇摆曲线求GaAs中Ga的反常散射因数

利用同步辐射光，在对称Ｌａｕｅ情况下，于Ｇａ的Ｋ吸收限附近，测定了ＧａＡｓ（２００）的衍射波和透射波的摇摆曲线．通过测定的透射波的摇摆曲线和Ｘ射线衍射动力学理论的相应计算结果的定量比较，求得ＧａＡｓ中的Ｇａ原子在其Ｋ吸收限附近的反常散射因数 关键词：     

吸收限附近GaAs在劳厄情况下的荧光溢出

利用同步辐射光源，在Ga和As的K吸收限之间调节入射X射线的能量时，在对称劳厄情况下，GaAs的(200)衍射峰附近可观测到从GaAs的入射面出射的Ga的K系荧光X射线.当入射X射线的能量改变时，荧光曲线的非对称性会发生变化，变化趋势与相应的对称布喇格情况相类似.但是，劳厄情况下的变化不能解释为晶体内部X射线驻波的波节面相对于GaAs(200)格子面的移动.在劳厄情况下，X射线驻波的振幅随入射角的变化与结构因子的相位密切相关，因此结构因子的相位变化也会导致荧光曲线的非对称性变化.在假设原子的荧光溢出与该原 关键词：