Di-μ-chlorido-bis­[(2′-carb­oxybiphen­yl-2-carboxyl­ato-κO)(2,2′:6′,2′′-terpyridine-κ3 N,N′,N′′)cadmium(II)] hemihydrate

In the centrosymmetric dinuclear title compound, [Cd2(C14H9O4)2Cl2(C15H11N3)2]·0.5H2O, each of the CdII ions is coordinated by three N atoms from a chelating 2,2′:6′,2′′-terpyridine ligand, two bridging Cl atoms and one O atom of a 2′-carb­oxy-[1,1′-biphen­yl]-2-carboxyl­ate anion. The coordination environment is distorted octa­hedral. In the crystal, inter­molecular O—H⋯O hydrogen bonds link symmetry-related mol­ecules, forming an infinite chain. The half-occupancy water mol­ecule is disordered over two general sites with 0.25 occupancy and is, in turn, disordered over an inversion center

优质护理服务对骨科空巢患者心理障碍的应用效果

Objective: To investigate the effect of high quality nursing service in empty-nest patients of psychological barriers among orthopedic ward. Methods: 60 empty-nester patients were chosen from orthopedic ward, 30 patients treated with high quality care demonstration were the observation group and 30 patients treated with conventional care demonstration were the control group, 30 patients in control group were given the conventional nursing methods during hospitalization, observation group given the high quality nursing service, observe the nursing satisfaction in two groups. Results: Observation group nursing care and nurses job satisfaction are higher than the control group and the depression, psychological mood of anxiety in observation patients are lower than the control group，the difference was statistically significant (P<0.05). Conclusion: Using the high quality nursing service in empty-nest patients among orthopedic ward, could effectively relieve patients' anxiety and other negative emotions, improve patients care satisfaction experience of nursing care and nurses job satisfaction, help to promote the high quality nursing service demonstration project. 目的  探讨骨科空巢患者住院期间采取优质护理服务的应用效果。方法  选取60例骨科住院空巢患者，骨科优质护理示范病房收治的30例空巢患者为观察组，骨科非优质护理示范病房收治的30例空巢患者为对照组，对照组在住院期间给予常规护理方法，观察组在此基础上采用优质护理服务，观察两组护理满意度。结果  观察组的患者对护理工作满意度高于对照组，观察组空巢患者抑郁、焦虑的心理情绪低于对照组，观察组护士职业满意度高于对照组，差异有统计学意义（P<0.05）。结论  对骨科住院空巢焦虑患者采用优质护理服务，可有效减轻患者焦虑等负性情绪，

Constraining the spatial curvature of the local Universe with deep learning

We use the distance sum rule (DSR) method to constrain the spatial curvature of the Universe with a large sample of 161 strong gravitational lensing (SGL) systems, whose distances are calibrated from the Pantheon compilation of type Ia supernovae (SNe Ia) using deep learning. To investigate the possible influence of mass model of the lens galaxy on constraining the curvature parameter $\Omega_k$, we consider three different lens models. Results show that a flat Universe is supported in the singular isothermal sphere (SIS) model with the parameter $\Omega_k=0.049^{+0.147}_{-0.125}$. While in the power-law (PL) model, a closed Universe is preferred at $\sim 3\sigma$ confidence level, with the parameter $\Omega_k=-0.245^{+0.075}_{-0.071}$. In extended power-law (EPL) model, the 95$\%$ confidence level upper limit of $\Omega_k$ is $<0.011$. As for the parameters of the lens models, constrains on the three models indicate that the mass profile of the lens galaxy could not be simply described by the standard SIS model.Comment: 17 pages, 7 figure

Silica supported perchloric acid: an efficient catalyst for the synthesis of 14-aryl-14H-dibenzo[a,i]xanthene-8,13-diones

The condensation of &#946;-naphthol with aromatic aldehydes and 2-hydroxynaphthalene-1,4-dione in presence of silica supported perchloric acid under solvent-free media to afford the corresponding 14-aryl-14H-dibenzo[a,i]xanthene-8,13-diones in excellent yields and short reaction times is described. The reaction work-up is very simple and the catalyst can be easily separated from the reaction mixture and reused several times in subsequent reactions

Widespread Presence of Glycolaldehyde and Ethylene Glycol Around Sagittarius B2

We report the detection of widespread CH$_2$OHCHO and HOCH$_2$CH$_2$OH emission in Galactic center giant molecular cloud Sagittarius B2 using the Shanghai Tianma 65m Radio Telescope. Our observations show for the first time that the spatial distribution of these two important prebiotic molecules extends over 15 arc-minutes, corresponding to a linear size of approximately 36 pc. These two molecules are not just distributed in or near the hot cores. The abundance of these two molecules seems to decrease from the cold outer region to the central region associated with star-formation activity. Results present here suggest that these two molecules are likely to form through a low temperature process. Recent theoretical and experimental studies demonstrated that prebiotic molecules can be efficiently formed in icy grain mantles through several pathways. However, these complex ice features cannot be directly observed, and most constraints on the ice compositions come from millimeter observations of desorbed ice chemistry products. These results, combined with laboratory studies, strongly support the existence of abundant prebiotic molecules in ices.Comment: 20 pages, 7 figures, accepted by Ap