聚六亚甲基碳酸酯二醇增韧环氧树脂的结构与性能

采用羟基封端的脂肪族碳酸酯－聚六亚甲基碳酸酯二醇对环氧树脂进行了增韧，通过扫描隧道显微镜，扫描电子显微镜，差示扫描量热分析以及动态力学性能分析等方法研究了增韧ＥＰ的结构与性能的关系。     

Acquired hemophilia and rheumatoid arthritis. Value of intravenous immunoglobulins

The authors report an exceedingly rare complication of rheumatoid arthritis, i.e. acquired hemophilia due to anti-factor VIII autoantibody production. Treatment with intravenous immune globulin ensured control of hemorrhagic manifestations by inducing a transient rise in factor VIII level.     

The crystal structure of an Fe-superoxide dismutase from the hyperthermophile Aquifex pyrophilus at 1.9 A resolution: structural basis for thermostability

The incidence of stress fractures is increasing among competitive and recreational athletes as well as among children and the elderly. By understanding the continuum of bone's response to stress and maintaining an appropriate index of suspicion, the health care provider can diagnose these injuries appropriately. An accurate history and examination is essential and will differentiate stress fractures from other stress reactions. The more common stress fractures are discussed.     

Family practice physicians' firearm safety counseling beliefs and behaviors

The purpose of this study was to identify family physicians' firearm safety counseling beliefs and behaviors. A survey was mailed to a random sample of 600 members of the American Academy of Family Physicians. A three wave mailing technique was used to maximize the response rate and yielded 271 usable surveys (55% response rate). Outcome measures included training experience in firearm safety counseling, the prevalence of firearm safety counseling by family physicians, and their perceptions regarding such counseling. The majority (78%) of family physicians lacked formal training on how to counsel patients about firearm safety and 49% believed more time should be spent in residency programs on firearm safety counseling. The majority (84%) of respondents never or rarely counseled patients on firearm safety and 50% believed firearm safety counseling should be a low priority in their delivery of primary care. The majority of respondents did not regularly counsel patients about firearm safety, did not believe firearm safety counseling should be a priority, and did not believe firearm safety counseling would be effective in reducing firearm-related trauma.     

Tetraparesis following dental extraction: case report and discussion of preventive measures for cervical spinal hyperextension injury

This concerns a patient with compression myelopathy following passive hyperextension of the cervical spine during a dental procedure. Although he had been asymptomatic prior to the procedure, subsequent cervical spinal imaging revealed advanced spondylosis and spinal stenosis. Spinal stenosis is often asymptomatic for a long time. However, when radiculomyelopathy occurs after minor trauma to the head or neck, the patient is often found to have spinal stenosis. Specifically, hyperextension of a cervical spine with spondylotic changes can lead to compression myelopathy. Acquired spinal stenosis correlates positively with aging. As the size of the elderly population continues to increase the prevalence of cervical spondylotic radiculo-myelopathy will likely increase as well. Since appropriate precautions against potential neurologic damage can be undertaken, we suggest radiographic screening for pre-existing spinal stenosis prior to a procedure requiring hyperextension of the neck. Preventive measures for individuals with asymptomatic spondylotic changes and education of all health-care professionals to avoid abrupt or prolonged hyperextension of the cervical spine is emphasized.     

一种实验炼钢渣的穆斯堡尔谱研究

一种实验炼钢渣不同炉次样品的室温透射穆斯堡尔谱由两组裂距较大的四极分裂双峰和一组裂距较小的双峰组成，它们分别相应于具有不同微观环境的Ｆｅ＾２＋和Ｆｅ＾３＋。参照文献中已知ＦｅｘＯ的穆斯堡尔谱数据，可确定该渣中的主要含铁相为ＦｅｘＯ。Ｘ射线衍射相分析给出相同的结果。按亚谱的面积比计算出Ｆｅ＾２＋和Ｆｅ＾３＋的相对含量分别为８５％和１５％左右。进一步选取与样品晶体结构相联系的原子簇模型。用ＭＳ－Ｘａ方     

Prognostic significance of cathepsin-D in patients with breast cancer

The expression of the protease cathepsin-D has been evaluated using an immunohistochemical technique with a polyclonal antibody in paraffin-embedded tissue from 359 patients treated between the years 1975-1981 for Stage I and II breast cancer. One hundred and twenty seven patients (35%) have strongly positive, granular staining, 138 (38%) are intermediately stained in the cytoplasm, and in 94 (26%) no staining is observed. There is a strong positive association between expression of cathepsin-D and the presence of tumour in axillary lymph nodes (P < 0.006). Expression of the protease is associated with significantly poorer survival of patients in univariate analysis (P = 0.025); however, this is not independent of other tumour variables.     

精密角位移传感器及其可靠性研究

从理论上探讨了磁阻率效应，叙述了精密角位移传感器的工作原理及结构设计。传感器的分辨率已达０．０１°，通过可靠性寿命试验，传感器的失效率λ（ｔ）＜１×１０－７／ｈ。