Research on geochemical characteristics and environmental risk of Be,Sb and Tl in surface sediments of the Nansihu Lake

The South-to-North Water Diversion Project is one of the biggest water transfer projects with the largest beneficiary population in the world. Nansihu Lake is the biggest reservoir lake in the east route of South-to-North Water Diversion Project. This study analyzed contents distribution and speciation characteristics of beryllium(Be),antimony(Sb) and thallium(Tl) in surface sediments of the Nansihu Lake. Their environmental risks were evaluated by multiple methods. Based on the results given by the predecessors,the toxic response factors of Be,Sb and Tl were defined in this paper. The results showed that the average contents of Be and Sb were a little higher than their background values,and Tl content was lower than its background value. Speciation analysis showed that the residual forms of Be,Sb and Tl accounted for over 65%,70%,and 84% respectively,while the contents of the acid soluble was very low which led to low mobility and bio-availability. The surface sediments of Nansihu Lake had low Be,Sb and Tl enrichment degree, and therefore the ecological risk was low. Be,Sb and Tl were mainly from nature and ancillary from human activity. Different from Be and Tl,the main human activity source of Sb might be atmospheric settlement. Distributions of Be,Sb and Tl in the sediments were affected by particle size,TOC,and Al/Fe/Mn to some extent.</p

Anxiety and depression status of patients with breast cancer and analysis of the related factors

目的:确定乳腺癌手术患者焦虑、抑郁状况及主要相关因素,为临床心理干预提供依据。方法:采用焦虑自评量表、抑郁自评量表及自行设计的调查问卷,对230例术后患者进行焦虑、抑郁评定和相关因素的分析。结果:乳腺癌患者焦虑和抑郁的发生率分别为56.09%、49.57%。乳腺癌手术患者常见焦虑、抑郁情绪的相关因素为年龄、文化程度、付费形式、家庭月收入、肿瘤分期等。结论:乳腺癌患者焦虑、抑郁的发生率较高,临床护理中要加强心理干预,以改善围手术期乳腺癌患者的心理状态

综合心理干预显著改善围术期老年乳腺癌患者的情绪和免疫功能

目的探讨综合性心理干预对老年乳腺癌患者焦虑抑郁、免疫功能的影响。方法将60例围术期老年乳腺癌患者按照对等匹配原则分成干预组和控制组,每组30例。干预组患者除接受常规护理外,还接受为期4 w的综合性心理干预,动态观察比较两组患者在治疗前后SAS和SDS评分、外周血T淋巴细胞亚群各项指标。结果干预后,干预组和控制组的焦虑抑郁状况均有所改善,但是干预组改善更明显,两组干预前后差值比较差异显著(均P<0.01)。结论综合心理干预可显著改善患者的焦虑、抑郁情绪,对改善免疫功能有一定作用

综合心理干预显著改善围术期老年乳腺癌患者的情绪和免疫功能

目的探讨综合性心理干预对老年乳腺癌患者焦虑抑郁、免疫功能的影响。方法将60例围术期老年乳腺癌患者按照对等匹配原则分成干预组和控制组,每组30例。干预组患者除接受常规护理外,还接受为期4 w的综合性心理干预,动态观察比较两组患者在治疗前后SAS和SDS评分、外周血T淋巴细胞亚群各项指标。结果干预后,干预组和控制组的焦虑抑郁状况均有所改善,但是干预组改善更明显,两组干预前后差值比较差异显著(均P&lt;0.01)。结论综合心理干预可显著改善患者的焦虑、抑郁情绪,对改善免疫功能有一定作用。</p

乳腺癌患者配偶焦虑抑郁状况的调查及相关因素分析

目的:评估乳腺癌患者配偶的焦虑抑郁状况,分析影响焦虑抑郁的相关因素。方法:采用问卷方式,调查蚌埠医学院第一附属医院肿瘤外科110名乳腺癌患者配偶。该问卷由焦虑自评量表(SAS)、抑郁自评量表(SDS)和人口社会学资料组成。结果:乳腺癌患者配偶焦虑和抑郁的发生率分别为43.36%和40.91%。SAS、SDS评分与国内常模比较差异均有统计学意义(P<0.01)。乳腺癌患者配偶常见焦虑、抑郁情绪的相关因素为年龄、文化程度、付费形式、家庭月收入、肿瘤分期等。结论:乳腺癌患者配偶焦虑、抑郁的发生率较高,临床护理中要加强对配偶的心理干预

基体表面的富碳碳化铬纳米复合超硬自润滑涂层及其制备方法

本发明提供一种基体表面的富碳碳化铬纳米复合超硬自润滑涂层及其制备方法。该复合涂层由硬质相多晶CrC与润滑相纳米晶碳nc-C组成，并且以多晶CrC为基质，nc-C镶嵌在该多晶CrC基质中，形成“内晶型”的nc-C-CrC复合涂层，该涂层硬度高达40GPa以上，磨损率达10-16m3-N·m量级。本发明采用多弧离子镀技术，以金属Cr为靶材，高纯Ar为工作气体，C2H2为反应气体制备该nc-C-CrC复合涂层，通过控制基体负偏压调控涂层中CrC与碳的结晶状态和纳米团聚特征，在切削加工刀具以及其它机械运动零部件等领域具有良好的应用价值