Crystal Structures and DNA Binding Properties of 2-Naphthoxyacetic Acid Cu(Ⅱ) Complexes

Two new copper complexes based on 2-naphthoxyacetic acid ligand, namely [Cu(L)_2(CH_3CN)]_2(1) and [Cu(L)(1,10-phen)_2](2), where L = 2-naphthoxyacetic acid and 1,10-phen = 1,10-phenanthroline, were obtained by hydrothermal reaction and characterized by single-crystal X-ray diffraction. The binuclear complex 1 and mononuclear complex 2 belong to space group C2/c and P■, respectively. The binding properties of the two compounds with ct-DNA were investigated by UV-Vis and fluorescence spectra. The two compounds could bind with ct-DNA through interactions. Compound 2 displays stronger binding ability in the reaction with ct-DNA.     

管内流体振荡强化传热的实验研究

一、概述 文献[1,2]给出了振荡管流强化传热的初步解析解和实验结果。该研究表明,在一定工况下,水在振荡时的轴向传热量约为静止时的10~4倍。文献[3～6]分别给出了绝热管壁振荡管流传热的理论与实验研究结果,总结出当量导温系数与流体的导温系数之比是沃姆斯利数、普朗特数及振幅管径比的函数。