[Longitudinal Study of the Association Between Handgrip Strength and Chronic Disease Multimorbidity among Middle-aged and Older Adults].

Objective: To investigate the potential association between multimorbidity and the handgrip strength of middle-aged and older adults.

Methods: The baseline (2011) and second-round follow-up (2015) data of China Health and Retirement Longitudinal Study (CHARLS) were used. Adults≥40 were selected as the subjects of the study.

[A Study of the Relationship Between Job Satisfaction and Work Engagement of Physicians in Public Hospitals].

Objective: To understand the level of job satisfaction and work engagement of physicians in public hospitals, to analyze the interaction between job satisfaction and work engagement, and to discuss how each dimension of job satisfaction affects work engagement so as to provide information and reference for improving the level of work engagement of physicians in public hospitals.

Methods: Covering 6 public hospitals in Sichuan (3 tertiary-level hospitals and 3 secondary-level hospitals), 638 questionnaires were obtained from physicians through convenient sampling for data description and analysis. Pearson correlation method was used to analyze the correlation between job satisfaction and work engagement, and multiple linear stepwise regression method was used to analyze work engagement and the influencing factors of each dimension.

[Applacation of portable energy-dispersive X-ray fluorescence spectrometer in chemical composition analysis of Chinese ancient glass].

Chemical composition is one of the most important aspects in the study of Chinese ancient glasses, as it could provide scientific proofs for the technical origin and development of Chinese ancient glasses. It is very necessary to find out some new an alyzing techniques. One of the most remarkable advantages for portable X-ray fluorescence technique is its portability, which allows antiques that can't be allowed to move out of museum to be analyzed.

[Ester derivatives of tetracyanoquinodimethane and their CT complexes: synthesis and studies by infrared spectroscopy].

Three ester derivatives of tetracyanoquinodimethane and their CT complexes were synthesized and characterized by elementary analysis and infrared spectra. The principal infrared absorption peaks were assigned and discussed for the region of 4000-400 cm(-1). Principal factors affecting principal infrared absorption were analyzed.

[Study on the spectral properties of a new fluorene derivative].

A new big pi-conjugated, symmetrical fluorene derivative, 9, 9-bis(2-ethylhexyl)-2,7-bis(2-(4-methoxy) benzene-2, 1-ethenyl) fluorene (abbreviated as MO-Flu-MO) was synthesized and characterized by elemental analysis, mass spectral, UV-Vis and IR spectral. Spectral characteristics of this compound, including linear absorption spectral and one-photon fluorescence spectral, were measured in acetonitrile, methylene chloride, tetrahydrofuran and hexane at room temperature. It was found that solvent effects have different influence on absorption spectral and fluorescence spectral, major reasons of such spectral behavior are discussed.

[Spectroscopy of alpha-isoxazoleazoxyl-beta-diketone derivatives and their tautomers].

In this paper, the IR and UV-Vis spectroscopy of five novel alpha-isoxazoleazoxyl-beta-diketone derivatives with different structures have been studied, and their keto-enol and azo-hydrazone tautomeric phenomena have been discussed. It was found that all compounds, which are in the solid or in the solution, exist in the form of hydrazodiketo and azoenol isomers. The authors can also see that there are two absorption bands which are in the range 246-262 nm and 326-339 nm, respectively, for all compounds in the UV spectra, and the intensities of long wavelength absorption bands which are attributed to azoenol forms are stronger than short wavelength absorption bands which are attributed to hydrazodiketo forms.