稀土配合物药物研究进展

综述了近10余年来稀土配合物药物研究进展以及发展趋势。研究现状反映出参与药物合成的稀土元素以镧、镨、钕和钐为主，配体以杂环化合物为多，药理作用研究主要集中在抗肿瘤、抗病毒以及抗菌等方面。在此基础上指出了稀土黄酮类配合物有望在抗骨质疏松症作用方面表现出良好的前景。     

双水杨醛二亚胺乙二烯与稀土配合物的合成与表征

合成了镧、铈、镨、钕、钐、铕、钆和钇等硝酸盐与双水杨醛二亚胺乙二烯八种固体配合物。通过化学元素分析、红外光谱、紫外光谱、核磁共振谱、差热热重分析、Ｘ－射线粉末衍射及摩尔电导等分析测试，对配合物的组成性质进行了研究。     

ICP-AES法测定镨钕氧化物及镨钕金属中的镧、铈、钐、钇、铝和硅量

重点研究了镨钕配分对测定镨钕中镧、铈、钐、钇、铝、硅量的影响。通过研究镨钕配分与其空白值之间的关系,采用一定校正方法,成功地用一套标样解决了不同镨钕配分试样中的镧、铈、钐、钇、铝和硅量的测定问题。方法简单易行,结果稳定可靠。与ICP-M S的对照结果令人满意。     

高纯氧化铕中微量镨、钕、钐和钆的氧化物的化学光谱测定

本文介绍了一个以 P204为萃取剂、锌粉为还原剂、在 PH=2的盐酸介质里,萃取分离高纯氧化铕中三价稀土杂质元素镨、钕、钐、钆。所得之镨、钕、钐、钆富集物、经氨水分离除锌,再经草酸沉淀、灼烧、称重,然后进行光谱测定的化学光谱测定方法。测定下限均可达0.0002%。用同位素示踪法对萃取流程做了鉴定,证明萃取率很好。方法操作简便快速。     

二茂铁亚甲硫基乙酸与稀土配合物的合成与表征

本文以氯化稀土ＲＥＣｌ３·ｎＨ２Ｏ（ｎ＝６）与二茂铁亚甲硫基乙酸钠Ｌ（Ｌ＝ＦｃＣＨ２ＳＣＨ２ＣＯＯＮａ）在无水乙醇中反应，合成了镧、钕、钐、铒四种新的配合物。通过元素分析、摩尔电导、红外光谱、紫外光谱、差热－热重等手段对配合物进行了研究，确定了配合物的组成为［ＲＥＬ３］·ｎＨ２Ｏ（ＲＥ＝Ｌａ、Ｎｄ、Ｓｍ、Ｅｒ，ｎ＝１或４）。配合物中配体的羟基以双齿螯合形式与稀土配位，硫也参与配位，配合物可能的配位数为９。     

P204－NdCl_3体系萃取除钐工艺研究

研究了酸性条件下，从含有少量钐的氯化钕溶液中，采用不皂化的二（２－乙基己基）磷酸（Ｐ２０４）萃取除钐的工艺，并在包钢稀土三厂年产１５０ｔ氧化钕生产线上进行了工业试验。经过９级逆流萃取，氧化钕中氧化钐含量由０．５％降至０．０８％，氧化钕纯度大于９９．５％，直收率９２％～９３％。     

基于辛酰类氨基酸钐(Ⅲ)配合物的合成、结构及光学性能研究

通过溶液法将三种辛酰类氨基酸配体与钐离子结合成三种新型氨基酸钐(Ⅲ)配合物,分别简写为Sm(oct-ala)₃、Sm(oct-phe)₃、Sm(oct-ser)₃。使用元素分析、¹H NMR和FT-IR结果确定了钐配合物的化学式和配位方式,XRD衍射谱表明,配合物是长程无序的非晶态结构,通过TG-DTA研究了钐配合物的热学性能,此外还测试了钐配合物在常见有机试剂中的溶解度。测试了钐配合物的紫外-可见光吸收、荧光光谱和量子效率,结果表明,三种钐配合物均具有良好的光吸收和发光性能。使用点胶涂敷法将配合物粉末封装在LED中,在365 nm波长的灯芯激发下趋向白光,验证了由发射光谱计算得到的CIE色度图。     

氧化物电解法制备钕铁合金的研究

在溶有氧化钕和钕富集物的NdF_3—LiF二元氟化物和NdF_3—LiF—BaF_2三元氟化物熔盐中,以工业纯铁为自耗阴极,电解纯度大于99%的氧化钕和氧化钕含量大于68%的钕富集物制备了钕铁合金。电解纯度大于99%的氧化钕,电流效率可达到85.21%。电解氧化钕含量大于68%的钕富集物电流效率随钐和铕变价元素含量的增加而降低。试验条件下,制备了铁含量11～21%的钕铁合金。     

导数光谱直接测定氯化钕溶液中的Pr、Sm、Eu

稀土元素吸收光谱的谱线复杂,相互干扰严重。导数光谱能够分辩重叠吸收带和消除背景干扰等特点。所以,稀土元素导数光谱的研究发展较快,特别是在高氯酸体系中的研究更加深入。本文研究稀土在盐酸介质中的各阶导数光谱,应用于氯化钕溶液中镨、钐、铕的测定。方法简便、快速,精密度和准确度令人满意。     

钕离子在聚合物介质中的可见吸收

合成了三价钕的辛酸盐。采用溶液铸膜方法，制得含三价钕的聚合物固态薄膜样品。测得聚合物介质中钕离子的吸收光谱。与无机玻璃中的钕离子吸收进行比较，发现二者的~（４）Ｉ_（９／２）─~（２）Ｐ_（１／２）能级相差５ｎｍ。讨论结果表明：聚合物介质能保留稀土离子的吸收性质，可用于稀土发光材料的介质。     

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.     

Craniometaphyseal and craniodiaphyseal dysplasia, head and neck manifestations and management

Mechanical allodynia (MA) following hand injury is a well-documented clinical problem. The purpose of this pilot study was to examine the relationship between hand MA and the upper limb tension test (ULTT). The ULTT mechanically stresses the neural structures from the C5/6/7 neural foramina to the median nerve distally. This study examined 29 subjects with unilateral hand MA before and after a 2-week neural self-mobilization programme. There was a significant difference between the subjects' affected and unaffected sides when tested using the ULTT, both in reproduction of symptoms and in reduced range of motion of the ULTT. Following the self-mobilization program, there was an improvement in the range of the ULTT, and subjects reported a reduction in their symptoms. Complete recovery was not obtained in all cases. The results of this study suggest that the ULTT is a useful tool both in assessment and treatment of subjects with hand MA.     

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。