Potential of Applying the Geometry-Based Rover Slip Prediction Model Learned on the Earth to the Moon

Russian Physics Journal - Wheeled ground robots are widely used in planetary exploration missions, where slip can measure problems during driving and pre-acquisition slips play an important role....     

Impact of the Aliphatic Dicarboxylate Chain of Novel Dinuclear Palladium(Ⅱ) Complexes: Synthesis and Biological Evaluation

Five dinuclear palladium(II) complexes with HOOC(CH₂)_nCOOH (n=2–6) and 2,2′‐bipyridine ligands were synthesigned by a reaction with K₂PdCl₄. To prepare such complexes with different aliphatic dicarboxylate chain lengths was in an attempt to correlate this length factor, which influences the biological activity of the complexes, with fluorescence spectra, DNA cleavage and cytotoxic activity. The results indicate that the complexes bind to fish sperm DNA (FS‐DNA) in an intercalative mode via fluorescence spectra, and the five complexes show different cleavage of supercoiled DNA, and then a cytotoxicity assay of these dinuclear palladium(II) complexes on human tumor cell lines was performed. In most of the cell lines, complex 5 (n=6) and 4 (n=5) showed much higher cytotoxicity than cis‐platin. On the other hand, complex 3 (n=4) was found to be moderately active, and complex 1 (n=2), complex 2 (n=3) were found only marginally cytotoxic. Implications of these findings were discussed from a structure‐activity relationship.     

Ag/Si核壳结构纳米颗粒粒子系的吸收特性研究

当电子振动频率与入射光的频率相同时,部分金属纳米颗粒可以在其表面激发局部表面等离子共振效应(LSPR),该波长下颗粒的吸收增强。这种效应也被应用于增强拉曼光谱信号的强度。本文研究了以Ag为外壳材料、Si为内核的核壳结构纳米颗粒粒子系的吸收特性。采用时域有限差分方法求解了颗粒随机分布粒子系的吸收率,分析了颗粒体积分数、内核外壳尺寸、椭球化等因素对粒子系吸收特性的影响以及对吸收峰的调控作用。     

Structure, DNA Binding Studies of Complex {[Cu(phen)(py)(H_2O)_2]·2H_2O}_n

A copper(II) complex of type {[Cu(phen)(py)(H₂O)₂]·2H₂O}_n (where phen=1,10‐phenanthroline, py=pyridine‐3,4‐dicarboxylate) has been synthesized by a normal temperature volatilization method and structurally determined by single‐crystal X‐ray crystallography. The crystal belongs to monoclinic system, space group P2(1)/c with the crystal cell parameters of a=7.5258(4) Å, b=12.3184(7) Å, c=21.0000(12) Å, α=90.00°, β=98.0720(10) °, γ=90.00°, V=1927.53(19) ų and Z=4. The final reliability factors are R=0.0398 and wR=0.1138 for 3771 reflections with I>2δ(I₀). Its mode of interaction with DNA and the binding constants have been determined by fluorescence, ultraviolet spectra and viscometry.     

低品位热能有机朗肯循环发电技术进展

有机朗肯循环发电技术是基于有机朗肯循环(Organic Rankine Cycle,ORC),利用低沸点有机工质,将低品位的余热资源转换为高品位的电能的先进技术,能够有效提高能源的利用率,减少能源损失.针对工业过程中大量中低温余热受到各种限制难以回收利用难题,全面综述了有机工质朗肯循环低温余热发电技术现状和进展,具体包...