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Mechanical alloying and subsequent heat treatment of Ag-Zn powders

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Transactions of nonferrous Metals society of China 2013年第7期23卷 2071-2078页

作者： Danny GUZMn Oscar RIVERA Claudio AGUILAR stella ORDOEZ Carola MARTínEZ Daniel sERAFInI Paula ROJAs Department of Metallurgy Atacama University and CRIDESAT485 Copayapu AvenueCopiapóChile Department of Metallurgy Atacama University485 Copayapu AvenueCopiapóChile Department of Metallurgical and Materials Engineering Federico Santa María Technical University1680 Espaa AvenueValparaísoChile Department of Metallurgical Engineering Santiago of Chile University3363 Bernardo O'Higgins AvenueSantiagoChile Department of Physics Santiago of Chile University3363 Bernardo O'Higgins AvenueSantiagoChile school of Mechanical Engineering Pontifical Catholic University of Valparaíso01567 Los Carreras AvenueQuilpuéChile

Microstructural evolution during mechanical alloying of Ag and Zn, and subsequent heat treatments were investigated. The mechanical alloying was carried out in a sPEX 8000D miller. The microstructural characterization was obtained by X-ray diffraction （XRD）, transmission electron microscopy （TEM） and scanning electron microscopy （sEM）. The thermal behavior was studied us.n. differential scanning calorimetry （DsC）. Based on the results obtained, it can be concluded that at the early stages of milling was possible to detect the ε, β, β′, α solid solutions and remaining Zn. Later, the ε, β, β′ and Zn phases disappeared while the Zn concentration of the α solid solution was strongly increased. After 7.2 ks of milling, the mechanical alloying process reached a steady state. During this period, both the composition and crystallite size of the α solid solution remained practically unchanged. On the other hand, subsequent heat treatments of milled powders showed that the α solid solution could also be obtained by the combination of mechanical alloying and heat treatment. Finally, the evolution of the microstructure during milling and annealing was combined to propose an optimal process.n. route in order to obtain a α solid solution.

关键词： mechanical alloying Zn-Ag alloys phase transformation heat treatment

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本田汽车公司新型1.6L轿车柴油机

汽车与新动力 2015年第2期47卷 19-23页

作者： n.Ikegami s.Mori T.Yano T.Miyake 范明强

本田汽车公司开发了第3代轿车柴油机,该机型的废气排放更低,动力性能更强劲。1.6L小型化4缸废气涡轮增压机型的结构非常紧凑,质量比老机型更轻。与目前的2.2L柴油机相比,新机型配装于新款Civic轿车后,燃油耗降低14.5%,按新欧洲行驶循环... 详细信息

本田汽车公司开发了第3代轿车柴油机,该机型的废气排放更低,动力性能更强劲。1.6L小型化4缸废气涡轮增压机型的结构非常紧凑,质量比老机型更轻。与目前的2.2L柴油机相比,新机型配装于新款Civic轿车后,燃油耗降低14.5%,按新欧洲行驶循环运行的百公里燃油耗为3.6L,CO2排放量仅94g/km。

关键词：柴油机燃油耗 CO2排放发动机小型化

TBP萃到-X荧光光谱法测定地质样品中的金

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国外铀金地质 1992年第3期8卷 82-86页

作者： s.n.Dmitriev T.V.shishkina E.L.Zhuravleva 李迹

研究了以TBP为固体萃取剂[sE(TBP)],从HCl、HnO_3和王水(3HCl+HnO_3)溶液萃取过程中,金及其用X射线荧光光谱(XRF)测定金时的干扰元素Zn、Pb、As的行为。样品经王水浸取后,从稠状液中萃取金,是定量和选择性回收金的最有利方法.其金的分配... 详细信息

研究了以TBP为固体萃取剂[sE(TBP)],从HCl、HnO_3和王水(3HCl+HnO_3)溶液萃取过程中,金及其用X射线荧光光谱(XRF)测定金时的干扰元素Zn、Pb、As的行为。样品经王水浸取后,从稠状液中萃取金,是定量和选择性回收金的最有利方法.其金的分配比D_(Au)约为10~4ml/g.从HCl溶液萃取时,在金的浓度为10^(-8)-10^(-4)mol/L范围内D_(Au)值总是大于10~4,但是随着萃取温度的升高,而D_(Au)值依次降低.从20℃的5×10~5ml/g降至70℃时的9×10~3ml/g.从氯化后的HCl液溶中萃取时,我们发现铅的分配比异常地高,即D_(Pb)为10~3ml/g.这一现象可以用由于Pb(Ⅳ)与氯形成了络合物来解释.研究了用XRF测定天然样品中的金的方法.本法包括采用0.025mol/L热硫脲液从sE(TBP)中反萃取金.这样也为二次XRF测定提供了薄样品层.用25g样品进行分析,其测定限为10×10~[-9],用不同的参考物进行精度实验,结果偏差小于10％.

关键词：金 X射线荧光光谱法地质采样

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成年斜视患者进行矫正手术的心理社会效益

世界核心医学期刊文摘(眼科学分册) 2006年第12期 33-34页

作者： Jacks.n.s. Harrad R.A. Morris M. Rumsey n. 潘佳鸿 Centre for Appearance Research University of the West of England Frenchay Campus Coldharbour Lane Frenchay Bristol BS16 1QY United Kingdom

Background: Few papers have addressed the psychological impact of strabismus in adults, with none comparing preoperative and postoperative data us.n. standardised questionnaires relating surgical results and psychosocial outcomes. Methods: 46 participants were seen at their 6 week preoperative and 3 month postoperative appointments. standardised measures of anxiety and depression (Hospital Anxiety and Depression scale), social anxiety (Derriford Appearance scale), and quality of life (WHOQoLBref) were completed. Results: Preoperatively, levels of depression were comparable to relevant population norms; however, levels of general anxiety were slightly raised and levels of social anxiety and social avoidance were significantly poorer than population norms. surgery resulted in significant improvements in psychosocial adjustment with improvements on all study variables for the participant group as a whole. The nondiplopic group made more significant gains than the diplopic group. Approximately one third of study measures were significantly correlated with the objective measure of eye misalignment preoperatively dropping to only one variable postoperatively. Calculations involving the subjective measure of eye misalignment and study variables showed the opposite pattern with five variables achieving significance postoperatively. There were no clear sex or age effects apparent in the data. Conclusion: strabismus surgery offers significant improvements to psychological and physical functioning.

关键词：社会焦虑受试者

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皮层电刺激引起的短暂单侧听力丧失

世界核心医学期刊文摘（神经病学分册） 2005年第6期1卷 48-49页

作者： s.n.a s.R. Crone n.E. Fotta R. 张玉龙 600 north Wolfe street Meyer 2- 147 Baltimore MD 21287 United States Dr.

A 32- year- old patient with seizures experienced decreased right- ear hearing during electrocortical stimulation mapping of the left lateral superior temporal gyrus. Audiometric testing under headphones confirmed a reversible, moderate unilateral hearing loss. Under binaural listening conditions, auditory comprehension was impaired at the same site, whereas word repetition, environmental sound recognition, naming, and spontaneous speech remained intact.

关键词：听力丧失电刺激右耳听力颞上回词语重复声音识别听力测试

培养的自体口黏膜上皮移植进行眼表重建的中期疗效观察

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世界核心医学期刊文摘（眼科学分册） 2006年第5期2卷 8-9页

作者： Inatomi T. nakamura T. Koizumi n. s. Kinoshita 潘佳鸿 Department of Ophthalmology Kyoto Prefectural University of Medicine Kawaramachi Hirokoji Kamigyo-ku Kyoto 602-0841 Japan Dr.

PURPOsE: To perform a midterm assessment of the integrity and reproducibility of cultivated autologous oral mucosal epithelial sheets, and to evaluate the clinical efficacy of their transplantation in ocular surface. DEsIGn: Observational case series. METHODs: Cultivated autologous oral mucosal epithelial sheets were created us.n. amniotic membrane and buccal mucosal epithelium from 12 patients with stevens-Johns.n.s.n.rome, chemical and thermal injury, pseudo-ocular cicatricial pemphigoid, and idiopathic ocular surface disorder. They were transplanted onto 15 eyes from these patients who were then followed up for a mean of 20 months; with the longest follow-up being 34 months. We assessed their clinical outcomes with special reference to neovascularization. REsULTs: Cultivated autologous oral mucosal epithelial sheets could be generated from all patients. On the second postoperative day, 14 of 15 sheets transplanted demonstrated total re-epithelialization on the cornea. During the follow-up, the ocular surface was stable and transparent without any major complications in 10 of 15 eyes (67%), and the transplanted epithelium survived for at least 34 months. There were five eyes (33%) with small but long-standing epithelial defects, three of these healed spontaneously, and two (13%) required reoperation. In 10 eyes, postoperative visual acuity was improved by more than 2 lines. All eyes manifested some peripheral corneal vascularization. COnCLUsIOns: We established a successful tissue-engineering technique to generate cultivated autologous oral mucosal epithelial sheets and succeeded in reconstructing the ocular surface. We suggest that this surgical modality may be both safe and useful, especially in younger patients with the most severe ocular surface disorders.

关键词：眼表重建上皮移植口腔黏膜 stevens-Johns.n.合征期疗效观察自体培养瘢痕性类天疱疮皮移植片皮片移植

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重修丝绸之路：迈向亚洲一体化

当代亚太 2009年第3期 36-56页

作者： Prabir De[印度] Biswa n.Bhattacharyay[印度] 刘小雪(译) 发展中国家研究和信息系统(RIs) 亚洲开发银行研究所中国社会科学院亚洲太平洋研究所

丝绸之路是指将东亚、中亚、南亚与地中海沿岸国家(包括北非和欧洲)连接在一起的、纵横交错的泛亚贸易交通网络。在过去的几十年中,随着全球化的不断深入,亚洲再度成为世界经济的重心。许多亚洲经济体成为了国际生产网络中不可分割的一... 详细信息

丝绸之路是指将东亚、中亚、南亚与地中海沿岸国家(包括北非和欧洲)连接在一起的、纵横交错的泛亚贸易交通网络。在过去的几十年中,随着全球化的不断深入,亚洲再度成为世界经济的重心。许多亚洲经济体成为了国际生产网络中不可分割的一部分,他们自身也从不断扩大的国际贸易、投资以及加速的经济增长中获益良多。然而,由于缺乏区域性连接,亚洲巨大的发展潜力尚未发挥出来。本文认为,缺乏全面的区域性连接是影响地区增长、阻碍亚洲乃至世界一体化进程的重要因素之一。鉴于此,亚洲应该加强地区通道建设,使之成为国际通道的一部分。本文还讨论了在通过泛亚运输基础设施建设实现地区连接的过程中,可能遇到的一系列问题和挑战。

关键词：亚洲丝绸之路基础设施地区合作一体化

晚期上皮性卵巢癌患者肿瘤细胞减灭术后直肠乙状结肠切除和初期吻合的发病率

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世界核心医学期刊文摘（妇产科学分册） 2006年第5期2卷 32-33页

作者： Mourton s.M Temple L.K Abu-Rustum n.R. 朱亮

studies from the colorectal literature have shown that factors associated with anastomotic leak after colorectal resection include long surgical time (>2 h), multiple blood transfusions, and short distance to the anal verge. The aim of this study was to assess the morbidity associated with en bloc resection of ovarian carcinoma with low anterior resection and anastomosis in patients undergoing primary cytoreductive surgery for advanced disease. Methods. We performed a retrospective chart review of all patients who had undergone primary cytoreduction for advanced epithelial ovarian cancer with rectosigmoid resection followed by low rectal anastomosis between January 1994 and June 2004. Patient characteristics, operative details, and postoperative complications were extracted from patients’ charts. Results. seventy patients met the above criteria and form our study group. The median age was 59 years (range, 25- 82). There were 52 stage IIIC (74% ) and 18 stage IV (26% ) cancers. The median operating time was 315 min (range, 120- 750) and the median estimated blood loss was 1200 ml (range, 250- 8000), with 53 (76% ) patients requiring blood transfusion. Twenty-eight patients (40% ) underwent major upper abdominal procedures other than omentectomy, and 14 patients (20% ) underwent a second bowel resection. Twelve patients (17% ) underwent a protective ileostomy while the remainder (83% ) did not. Of the 58 patients with no ostomy, the only complications associated with the resection and anastomoses were a pelvic abscess in 3 patients (5% ) and an anastomotic leak requiring diverting colostomy in 1 patient (1.7% ). Of the 12 patients who had protective ileostomies, 3 (25% ) had complications related to their ileostomy short-bowel s.n.rome requiring early reversal, incarceration of the prolapsed loop requiring surgical correction, and prolapse corrected electively at the time of second-look surgery. Conclusions. In women undergoing primary cytoreductive surgery, the morbi

关键词：肿瘤细胞减灭术上皮性卵巢癌直肠乙状结肠晚期卵巢癌回肠造口术吻合口漏切除吻合术网膜切除术

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肢端角化性弹性组织角化症

世界核心医学期刊文摘（皮肤病学分册） 2005年第9期1卷 13-14页

作者： Tsai s. Kageyama n. Warthan M. Cockerell C.J. 刘艳 Division of Dermatopathology 2330ButlerDallas TX 75235 United States Dr.

A 45-year-old white woman pres.n.ed with several years’history of firm, shiny papules on the lateral hands with slight extension to the dorsal fingers. The lesions first appeared between the index fingers and thumbs on both hands. They gradually increased in number, coalescing into plaques and affecting the junction between the palmar and dorsal skin. The patient did not have involvement of her feet. she had been diagnosed previously with chronic eczema that had failed to respond to multiple topical medications. In addition, the patient’s sister had similar lesions on both hands. The patient denied any symptoms of hyperhidrosis, excessive s.n.exposure, or trauma. The plaques were asymptomatic, but were cosmetically unappealing to the patient. On physical examination, small, firm, skin-colored, hyperkeratotic papules, coalescing into plaques, were located on the junction between the palmar and dorsal skin on both lateral margins of the thumb and on the radial side of the index finger (Fig. 1). There were no lesions on the feet. A biopsy taken from a papule on the patient’s left hand was consistent histologically with acrokeratoelastoidosis. The biopsy showed marked degeneration of collagen in the dermis with solar elastosis and some smudging of the papillary dermal collagen (Fig. 2). she was treated with clobetas.n. cream to the affected areas on the hands. After 6 weeks of treatment, she reported no significant improvement.

关键词：角化症角化性肢端真皮乳头氯倍他松真皮胶原角化过度双手食指活检组织学指背