溴化法提金液中溴的测定

用铜试剂（二乙氨基二硫代甲酸钠）消除溴化法提金液中的干扰元素，用碘量法可快速准确地监控溴化法提金过程中溴的变化．精密度优于±２％，标准回收９６％～１００．５％。     

金的溴化溶解

金的溴化溶解美国爱荷达州立大学矿业学院研究了Ａｕ－Ａｇ、Ａｕ－Ａｇ－Ｔｅ和无银的金矿石等三种难熔矿石经加压预氧化后由溴化溶解金的情况．黄铁矿是这些矿石中提取金的主要矿石，在标准条件下温度、氧气压力、时间和矿浆浓度等加压氧化参数对溴化的影响进行了研究，...     

四溴钯酸钾合成工艺的改进

采用改进的新工艺，通过预处理过程使金属钯粉的表面活性增大，并且使用双氧水代替硝酸作为氧化剂，溶入氢溴酸中，再与溴化钾反应得到四溴钯酸钾。用原子吸收光谱仪和扫描电子显微镜分析产品，结果与文献报道一致。改进后的工艺操作简单，生产过程时间短，操作环境友好，适合规模化生产。     

采用浸泡法保养 提高溴冷机使用寿命

杭钢焦化厂3台2300kW溴化锂制冷机运行5年后铜管内壁点蚀严重，改用了铜缓蚀剂溶液浸泡的停机保养方法。该方法操作简单，可以有效减缓铜管内壁的腐蚀。     

二溴硝基偶氮氯膦光度法测定钛

二溴硝基偶氮氯膦光度法测定钛黄湘源，余燕影，高智慧（南昌大学化学系，南昌，３３００４７）利用新显色剂二溴硝基偶氮氯膦（ＤＢＮ－ＣＰＡ）测定稀土、铝、锆等已有所述［１～４］，而用ＤＢＮ－ＣＰＡ试剂光度法测定钛则尚未见文献报导。本文详细地研究了该试剂与钛...     

三溴偶氮胂在稀土元素光度分析中的应用

在综合分析大量文献的基础上，全面评述了三溴偶氮肿在光度法测定稀土总量、铈组稀土分量和某些单一稀土元素中的应用情况，包括吸光光度法、固相光度法、动力学光度法、计算光度法等。     

溴代金在树脂上的负载特性

溴代金在树脂上的负载特性美国明尼苏达大学矿物资源研究中心通过完全混合分批反应系统对四溴化金在弱碱性阴离子交换树脂ＰＡＺ－４上的吸附特性进行了研究．结果表明，达到负载平衡的时间实际上需要几天，而达到金的高负载容量值１５～２０ｍｇ／ｇ干树脂（Ａｕ１０００...     

均三溴偶氮胂光度法测定硅铝钡铁合金中的钡

采用均三溴偶氮胂（ＴＢＡ）作显色剂测硅铝钡铁合金中的钡，操作简便、快速，标准偏差为０．０３０，可代替传统的ＢａＳＯ４重量法。     

二溴羧基偶氮胂分光光度法测定球墨铸铁中稀土总量

在０．３６ｍｏｌ／Ｌ硫酸介质中，铈稀土与二溴羧基偶氮胂形成兰紫色配合物，其最大吸收位于６３２ｎｍ处，表观摩尔吸光系数为１．４０－１．２８×１０＾５。（Ｌａ、Ｃｅ、Ｐｒ、Ｎｄ、Ｓｍ）在草酸存在下，可不经分离直接测定球墨铸铁中０．０１０－０．０５０％稀土总量。     

Voices of fear and anxiety and sadness and depression: The effects of speech rate and loudness on fear and anxiety and sadness and depression.

Two studies investigated the role of expressive vocal behavior (specifically, speech rate and loudness) in fear and anxiety and in sadness and depression. In the 1st study, participants spoke about personally experienced fear and anxiety-arousing and neutral events using 3 different voice styles: fast and loud, normal, and slow and soft. In the 2nd study, participants spoke about personally experienced sad or depressing and neutral events using the same 3 voice styles. In both studies, the participants' highest levels of subjective affective and cardiovascular (CV) arousal occurred when they spoke about the emotional events in a mood-congruent voice style: fast and loud in the case of fear and anxiety, and slow and soft in the case of sadness or depression. Mood-incongruent voice styles canceled the heightened levels of CV arousal normally associated with these negative emotions. The voice-style manipulation had no significant effect on the participants' levels of CV arousal during the neutral discussions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Synthesis and analysis of mixed chlorinated-fluorinated dibenzo-p-dioxins and dibenzofurans and assessment of formation and occurrence of the fluorinated and chlorinated-fluorinated dibenzo-p-dioxins and dibenzofurans

Despite the use of multimodal therapy, higher-grade glioma is still uniformly fatal in the adult population. There is a considerable difference between the length of survival in each given patient, even within the same tumor type and malignancy grade group, suggesting that there are factors that might differentially influence outcome. To identify such factors, 107 patients with anaplastic or malignant glioma were retrospectively investigated. Clinical parameters and paraclinical data on the p53, mdm2, and EGFR genes at the DNA or protein level were evaluated by univariate analysis and Cox proportional hazards regression modeling. Kaplan-Meier survival estimation demonstrated that immunohistochemical positivity for mdm2 protein in patients with anaplastic astrocytoma or with glioblastoma multiforme was associated with a shorter survival time (p = 0.02). P53 gene mutations and immunopositivity for the epidermal growth factor receptor (EGFR) protein were not significantly related to poor prognosis. The Cox proportional hazards model revealed immunohistochemical positivity for p53, mdm2, or for both of them, the presence of postoperative irradiation, and the extent of surgical resection of tumor to be variables significantly associated with prolonged survival. EGFR overexpression, age over 60 years, and Karnofsky performance score below 40 points did not significantly shorten survival time. In conclusion, the present study identified immunohistochemically detected mdm2-protein overexpression as a statistically significant negative prognostic parameter in patients bearing anaplastic or malignant glioma. Association analysis of variables revealed a possible correlation between mdm2 and p53, which is also consistent with the biological interaction mode of both proteins in vivo.     

Sexuality and aging--usual and successful

BACKGROUND: As aging research increasingly reflects an effort to dissociate true time-driven changes from those that can be improved, sexuality in later life remains largely unexplored. Several problems are evident. There is a lack of normative data, a lack of a conceptual framework relating to the biology, psychology, and sociology of sex, and an attitudinal resistance that obscures the entire topic. METHODS: We conducted a three-part instructional series on major topics involved with sexuality and aging. We surveyed our group of attendees (n 158, average age 68 for males, 65 for females) before and after the series. RESULTS: A remarkably robust sex life was evidenced by both the men and the women, even until advanced old age. Yet, a substantially decreased involvement was reported from 10 years earlier. Despite current activities, people of both sexes wished they were participating even more than they currently were. Impotency was identified as the major negative feature for the men; relationship problems were for the women. A questionnaire 6 months after the series reported improved sexual attitudes, but no change in sexual activities from the earlier survey. CONCLUSION: Sexuality is a major quality-of-life issue which persists into old age. Our study showed that the usual sexual practices reported by our group were not considered by them to be ideal. The intervention of this instructional series provided improved sexual attitudes but not performance. Additional studies are encouraged.     

Spondylolysis and spondylolisthesis and sports

Spondylolysis and spondylolisthesis occur predominantly in the lower lumbar spine. Besides congenital defects such as predisposition of spondylolysis the correlation between competitive sports activities and an increased incidence of spondylolysis is proved. In early stages, complete healing can be achieved by conservative treatment (abstinence from sports activities for 3 months, orthesis). Persistence of pain, neurologic symptoms and progression of vertebral slipping are indications for operative treatment (reconstruction of the isthmus, dorso-ventral spondylodesis). The exercise tolerance depends on the extent of instability, progression of vertebral slipping and clinical symptoms. The limits of exercise tolerance vary among the individual athletes and require the decision of the physician. Backstroke swimming, abdominal and back muscle strengthening exercises, and types of sport involving smooth movements are advisable. Sports education in school is possible without restriction in patients with stable spondylolysis and in those with spondylolisthesis without unfavourable concomitant factors.     

Larks and owls and health, wealth, and wisdom

OBJECTIVE: To test the validity of Benjamin Franklin's maxim "early to bed and early to rise makes a man healthy, wealthy, and wise." DESIGN: Cross sectional analysis of sleeping patterns in a nationally representative group of elderly people, and longitudinal investigation of mortality. SETTING: Eight areas in Britain (five in England, two in Scotland, and one in Wales). SUBJECTS: 1229 men and women aged 65 and over who in 1973-4 had taken part in a survey funded by the Department of Health and Social Security and for whom data on sleeping patterns, health, socioeconomic circumstances, and cognitive function had been recorded. MAIN OUTCOME MEASURES: Self reported income, access to a car, standard of accommodation, performance on a test of cognitive function, state of health and mortality during 23 years of follow up. RESULTS: 356 people (29%) were defined as larks (to bed before 11 pm and up before 8 am) and 318 (26%) were defined as owls (to bed at or after 11 pm and up at or after 8 am). There was no indication that larks were richer than those with other sleeping patterns. On the contrary, owls had the largest mean income and were more likely to have access to a car. There was also no evidence that larks were superior to those with other sleeping patterns with regard to their cognitive performance or their state of health. Both larks and owls had a slightly reduced risk of death compared with the rest of the study sample, but this was accounted for by the fact that they spent less time in bed at night. In the study sample as a whole, longer periods of time in bed were associated with increased mortality. After adjustment for age, sex, the presence of illness, and other risk factors, people who spent 12 or more hours in bed had a relative risk of death of 1.7 (1.2 to 2.5) compared with those who were in bed for 9 hours. The lowest risk occurred in people who spent 8 hours in bed (adjusted relative risk 0.8; 0.7 to 1.0). CONCLUSION: These findings do not support Franklin's claim. A "late to bed and late to rise" lifestyle does not seem to lead to socioeconomic, cognitive, or health disadvantage, but a longer time spent in bed may be associated with increased mortality.     

深云立交桥梁检测及加固改造

根据深云立交桥梁的检测结果，对该桥目前的整体状况、工作状态，及其使用情况做出综合评价，对桥的病害原因进行了分析，并提出合理的加固方案。     

关于摩尔浓度及其与硬度转换关系问题的讨论

众所周知，国际单位制物质的量采用摩尔(mol)表示，近几年出版的给排水专业书籍，为了与国际单位制接轨，逐渐将摩尔的使用频率不断提高，被给排水技术人员广泛应用的新版给排水设计手册，将表示物质浓度的单位“当量／升”或“毫克当量／升”．改为mol／l或mmol／l，虽然编者对其基本单元定义作了说明，但在实际运用上仍会出现误解，     

《儿子与情人》的语码转换与男女二元对立

劳伦斯小说《儿子与情人》一个鲜明的语言特色就是标准英语和当地方言频繁的语码转换。莫瑞尔用方言来对抗妻子,而妻子坚持用标准英语,偶尔也用方言来讽刺、挖苦丈夫。语码转换反映了劳伦斯男女二元对立的哲学思想。     

抗腐蚀高强耐磨涂料研发与应用

介绍了抗腐蚀高强度耐磨涂料的研制和开发，以及用作柳钢球团回转烘干机刮板保护涂层的应用效果。