生物医用钛及其合金材料的开发应用进展、市场状况及问题分析

对生物医用钛及其合金材料的最新开发应用进展与市场状况进行了综述;并对我国目前在应用生物医用钛及其合金方面存在的问题进行了初步分析;并对这一领域的发展前景进行了展望.     

生物医用钛及其合金材料的开发应用进展、市场状况及问题分析

对生物医用钛及其合金材料的最新开发应用进展与市场状况进行了综述;并对我国目前在应用生物医用钛及其合金方面存在的问题进行了初步分析;并对这一领域的发展前景进行了展望。     

钛材在医学方面的应用

钛及其合金作为耐蚀和生物相容材料在医用方面已久负盛名.早在七十年代,前苏联就进行了大量的研究,直到目前,钛在该领域应用的研究兴趣仍在不断地增长.世界钛会上以及在非航空领域的应用方面有不少文章涉及到钛在医疗方面的应用,在国际钛协会组织的专业会议和展览会上与会代表们也十分关注这个问题.这必将促进钛及其合金在医学方面应用的深入研究以及生产工艺的不断发展.钛在医学方面的应用领域相当广,现已取得了长足的进展并得到了广泛的应用,诸如在人体髋关节的修复方面,现在每年大约有40万个钛制髋关节用于病人身上,这为人类健康、解除病痛做出了贡献.     

钛基生物医用复合材料发展现状与进展

以实现人体硬组织修复替代为应用目标的钛基复合材料是当前医用材料研究的活跃领域之一。从基体选择、涂层材料、复合制备技术等方面介绍了生物医用钛基复合材料的研究现状和近年来取得的进展，并提出了将来的发展趋势。     

专利信息

专利名称：一种医用生物植入体及制备方法；专利名称：表面活性坚强内固定钛接骨板；专利名称：钛及钛合金制品的等离子体抛光方法；专利名称：光钛催化紫外空气消毒器     

生物医用纯钛的粉末微注射成形工艺研究

钛材料作为目前生物医用性能最好的材料,具有一系列的优良性能,如高比强度、低弹性模量、优良的耐磨耐蚀性和优异的生物相容性。金属粉末微注射成形(Micro MIM)技术作为一种新兴的微加工技术,为钛材料在生物医用微型植入物领域的应用提供了一种低成本、大批量、近净成形途径。利用微注射成形技术制备了纯钛微型试样,并对试样进行了脱粘和烧结。通过调整脱粘和烧结工艺参数,制得整体性能如下的试样:氧质量分数0.240%,氮质量分数0.028%,屈服强度450 MPa,极限抗拉强度565 MPa,伸长率18.0%,相对密度97.3%。试样的整体性能满足ASTM F2989-13外科植入用金属微注射成形纯钛构件要求。     

生物医用钛及钛合金的研制、生产和应用

简介了新型生物医用功能材料用钛及钛合金的研制历史、生产、标准和应用。     

钛及钛合金植入体表面微纳结构制备技术及生物性能研究进展

对国内外医用钛及钛合金植入体表面微纳结构制备技术的研究现状进行综述。介绍了喷砂、微切削和激光等机械加工方法,等离子喷涂、溅射等物理方法,酸蚀、碱热处理、阳极氧化等化学处理方法在钛及钛合金植入体表面制备的微纳结构,概述了微纳结构对钛及钛合金植入体生物相容性的影响。最后,总结各种制备方法的优劣,并结合目前医用钛及钛合金植入体表面微纳结构研究中存在的问题,指出了植入体表面微纳结构制备方法的发展趋势。     

钛制管路防污方法研究进展

钛材良好的生物相容性导致其在海水管路应用中面临着严重的海洋生物污损问题。分析了钛材表面污损生物附着机理及附着规律,分别介绍了微生物污损与宏生物污损对钛材的影响,阐述了国内外钛制管路常用的防污技术及其特点,并指出了钛制管路污损防除技术的研究方向:(1)掌握污损生物在钛材表面的附着规律及与钛材界面的作用机制,以助于防污技术的研究;(2)开发无毒、节能、高效的新型海洋生物防污技术。     

专利名称:一种复杂形状生物医用多孔钛钼合金植入体的制备方法

专利申请号:CN201110344241.4公开号:CN102335742A申请日:2010.02.17公开日:2012.02.01申请人:北京科技大学本发明提供了一种快速制备复杂形状生物医用多孔钛钼合金植入体的方法,属于生物医用多孔金属材料制备技术领域。采用钛、钼金属元素粉末与有机高分子粉末的混合物为原料,通过三维建模、选     

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。