二茂基稀土二吡啶胺基配合物的合成及表征

用三茂基稀土络合物与等摩尔的二吡啶胺在四氢呋喃（THF）溶剂中于室温下反应，合成了四个对空气和湿气敏感的未见报道的二吡啶胺基稀土金属有机配合物．产物经元素分析、红外光谱、质谱等鉴定，确定它们的组成为Cp2Ln（DPA）THF（Cp为茂基，DPA为■基,Ln=Yb,Ho,Sm,Pr）.     

New animal model of emotional stress： Behavioral, neuroendocrine and immunological consequences

This report describes a new model of emotional stress, which was induced by randomly giving an empty water bottle to rats during watering periods per day for 14 consecutive days. The behavioral, endocrinological and immunological consequences were investigated. The data showed that the emotional stress activated both the hypothalamic-pituitary-adrenal axis and the sympathetic nervous system, leading to the increased blood levels of corticosterone and catecholamine. It also elicited attacking and exploring behavior, suppressed the immune function of the rats, including leukocyte counts, weight of the spleen, and the level of specific anti-ovalbumin IgG antibody production. Presenting no water and no empty bottle to rats only evoked the exploring behavior, increased the corticosterone level and decreased the leukocyte counts. These findings demonstrate a role of psychological factors on behavioral, endocrinological and immunological functioning. The animal model described in the present study may serve as an analogue mimicking emotional stress experienced in humans (e.g. anger and/or anxiety), and may be useful for further studying the complex relationships among emotional stress, behavior, and immune function.