终末期患者希望心理研究进展

阐述终末期患者的希望概念、终末期患者希望心理变化趋势,以及个体希望与主流社会文化价值观之间互动状况的研究进展。建议对护理人员开展相关培训,提高对患者希望心理关注度和安宁疗护水平;可采取质性研究和量性研究相结合的研究方法,更深入广泛地开展探索,从而推动我国安宁疗护的发展。

希望源量表测评医务人员的效度和信度

目的:检验希望源量表(LOH)中文版在医务人员中的效度和信度。方法:选取医务人员315人,进行条目分析、效度分析和信度分析,用生活取向量表(LOT)、情绪调节量表(ERQ)、医院焦虑抑郁量表(HAD)检验效标效度。结果:条目与总分相关均有统计学意义(均P<0.001)。探索性因素分析显示,修订后21个条目LOH的累积方差解释率为66.50%。验证性因素分析显示,修订后LOH的3因子模型拟合良好(χ^(2)/df=3.30,CFI=0.91,TLI=0.90,RMSEA=0.09)。修订后LOH总分及各维度得分与LOT总分和ERQ认知重评维度得分呈正相关(r=0.34~0.60,均P<0.01),与HAD焦虑和抑郁维度得分呈负相关(r=-0.25~-0.47,均P<0.01)。总量表Cronbach's α系数为0.95,分半信度为0.93,重测信度为0.60。结论:希望源量表中文版在医务人员群体中具有良好的效度和信度。

Theoretical study of partial oxidation of ethylene by vanadium trioxide cluster cation

Density functional theory (DFT) study of reaction between vanadium trioxide cluster cation (VO3+) and ethylene (C2H4) to yield VO2+ + CH3CHO (acetaldehyde) and VO2CH2+ + HCHO (formaldehyde) is carried out. Structures of all reactants, products, intermediates, and transition state in the reaction have been optimized and characterized. The results show unexpected barriers in the reaction due to the existence of a η2-O2 moiety in the ground state structure of VO3+. The initial reaction steps combining ethylene adsorption, C=C activation and O-O cleavage are proposed as rate limiting processes. Comparison of reactions of VO3+ + C2H4 with VO3 + C2H4 and VO2+ + C2H4 in the previous studies is made in detail. The results of this work may shed light on the understanding of C=C bond cleavage in related heterogeneous catalysis.