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在高温和高能脉冲离子束辐射下离子渗碳和离子渗氮生成的扩张奥氏体的稳定性

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热处理技术与装备 2013年第5期34卷 28-28页

作者： Molleja j G Milanese M Piccoli M Moroso R Niedbalski j Nosei L Bürgi j Bemporad E Feugeas j

奥氏体不锈钢用离子渗碳或离子渗氮能生成扩张的奥氏体。两种工艺得到的过饱和碳或氮的fcc晶体结构能很好地硬化,提高耐磨性,且保持原有的耐蚀性能。在本项研究中我们在AISI 316L SS不锈钢上在高温(225～504℃)和高能(30～500 keV),高通... 详细信息

奥氏体不锈钢用离子渗碳或离子渗氮能生成扩张的奥氏体。两种工艺得到的过饱和碳或氮的fcc晶体结构能很好地硬化,提高耐磨性,且保持原有的耐蚀性能。在本项研究中我们在AISI 316L SS不锈钢上在高温(225～504℃)和高能(30～500 keV),高通量(～1015cm-2),短时间保温(～400 ns),轻离子束(氘和氦)的辐射下,用离子渗碳和离子渗氮渗入N和C生成扩张的奥氏体,并研究它的稳定性。发现扩张的奥氏体在325℃以下是稳定的,在325℃和504℃之间,随温度升高它的晶格常数逐渐减小。我们观察到显微组织只和处理温度有关,由于热处理时间不长,没有观察到组织变化。超过504℃晶格常数回复到奥氏体材料原来的晶格常数。另一方面,观察到当用脉冲离子束时,随着脉冲数减少扩展奥氏体的晶格常数也减小。这种行为可以解释为通过由每束辐射作用在表面上因热振动,包括快速加热然后快速冷却引起N或C逐渐外扩散。然而发现经过20个离子脉冲后最终的晶格常数比原始奥氏体的略高一些,这是稳定的极限。这个残余的扩张量是由于在紧靠表面层的奥氏体晶体中产生应力引起几微米的部分非晶化的结果。

关键词：奥氏体不锈钢离子渗氮离子渗碳高能脉冲稳定性离子束辐射高温

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姿势对忽视患者垂直感觉的影响

世界核心医学期刊文摘(神经病学分册) 2006年第2期 58-58页

作者： Saj A. Honoré j. Davroux j. 梁伟 Laboratoire de Neurosciences Fonctionnelles et Pathologies CNRS FRE 2726 CHRU-Hpital Roger Salengro 59037 Lille Cedex France Dr

Background and Purpose -The anticlockwise (ACW) deviation of the visual and visuohaptic subjective verticals (SVs), known to occur in patients with right hemisphere lesion, is amplified by spatial neglect (N). These patients have only been assessed when sitting. We investigated the hypothesis that postural changes modulate visuohaptic SV deviation. Methods -Eight patients presenting with a right hemisphere lesion and spatial N were compared with 6 matched control subjects (C). In the dark, they had to rotate a luminous rod to put it at the vertical in 4 conditions: (1) sitting with plantar sole support; (2) sitting without plantar sole support; (3) sitting with legs extended on a support; and (4) supine position. Results -N patients showed a significant ACW deviation (-4.5°) of the SV compared with C subjects (+0.01°). The effect of body position depended on the group (P=0.022) because changes had definite effects in the N but not in the C group. In fact, the former showed a reduction of the ACW deviation, from the first to the fourth condition. Conclusions -Although the possible role of plantar and leg somaesthetic inputs remains to be thoroughly investigated, the modulation of gravitational inputs at trunk or vestibular level influences the SV deviation in N patients. This has to be put in relation with the modulation of N sig ns reported by other authors when passing from the sitting to the supine position.

关键词：患者

Economic impact of traumatic spinal cord injuries in the United States

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Neuroimmunology and Neuroinflammation 2019年第7期6卷 1-11页

作者： Christopher H.Merritt Matthew A.Taylor Caleb j.Yelton Swapan K.Ray Department of Pathology Microbiologyand ImmunologyUniversity of South Carolina School of MedicineColumbiaSC 29209USA

Individuals having sustained traumatic spinal cord injury(TSCI)in the United States are living longer as compared to historical trends,thanks to an ever-evolving understanding of the nature of this *** this,multiple barriers to care for TSCI patients remain including variations in government-issued veteran insurance,privatized insurance,and among uninsured *** United States alone experiences 12,000 new TSCI cases every year,many of these are found to occur in a growing proportion of elderly *** is crucial to understand both the short-term direct costs as wells as the long-term rehabilitation costs required by these TSCI *** lifetime financial burden for those having sustained a TSCI can be immense for patients,insurance companies,and hospital systems *** those with TSCI,re-hospitalization rates are high,leading to increased healthcare resource utilization within this specific patient *** can quickly balloon into hundreds of thousands of dollars and cause a profound financial burden for these *** review article seeks to communicate an understanding of the current financial landscape surrounding TSCI *** authors will also examine the costs of acute emergency room surgical care such as American spinal injury association grade,hospital length of stay,as well as the timing delay between injury and surgical ***-term costs associated with TSCI such as rehabilitation,care of secondary comorbidities,and post-injury employment prospects will be examined as *** costs will be framed from the patient's perspective as well as from both the hospital and insurance company's *** is hoped a complete understanding as to what makes TSCI such a medically and financially burdensome injury will allow for improved healthcare resource utilization in this population.

关键词： Traumatic spinal cord injury healthcare resource American spinal injury association grade hospital length of stay rehabilitation post-injury employment

HIV和甲基苯丙胺滥用对大脑损伤的独立和联合影响

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HIV和甲基苯丙胺滥用对大脑损伤的独立和联合影响

Duane眼球后退综合征的类型与外展神经存在与否的关系

第十届全国药物依赖性学术会议暨首届中美药物滥用和HIV/HCV共病专题研讨会

作者： j.Panee A.Yanagihara M.Ricardo-Dukelow Buchthal S H.Nakama M.Berry T.Ernst Department of Cell & Molecular Biology John A.Burns School of Medicine Bekesy Lab Pacific Biosciences Research CenterUniversity of Hawaii at ManoaHonolulu Hawaii96821 Department of Medicine John A.Burns School of Medicine Department of Psychiatry John A.Burns School of Medicine

Oxidative stress may be involved in neuronal injury in HIV patients with or without history of methamphetamine (METH) *** glutathione (GSH),an antioxidant,were shown to be decreased in HIV,as well as in postmortem bra... 详细信息

关键词： HIV methamphetamine abuse brain injury

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世界核心医学期刊文摘（眼科学分册） 2005年第5期1卷 55-55页

作者： Kim j.H. Hwang j.-M. 张少娟

To analyze whether the presence of the abducens nerve might depend upon the ty pe of Duane’s retraction syndrome (DRS). Observational case series. Sixteen pat ients with type 1 DRS, 2 patients with type 2 DRS, and 5 patients with type 3 DR S. Ophthalmologic examination and thin-sectioned magnetic resonance imaging (MR I) at the brain stem level were performed in 23 DRS patients. To confirm the acc uracy of the procedure, we compared the results obtained with those of a control group of 30 individuals using the same technique. Examination of ductions and v ersions and the presence of the abducens nerve on MRI. The abducens nerve on the affected side could not be observed using MRI in 18 (100%) of 18 eyes (16 pati ents) with type 1 DRS and in 3 of 5 eyes with type 3 DRS. Conversely, the abduce ns nerve was observed in 2 of 2 eyes with type 2 DRS and 2 of 5 eyes with type 3 DRS. The abducens nerve was observed in 60 (100%) of 60 eyes screened as contr ols. The abducens nerve on the affected side was absent in type 1 DRS patients a nd some type 3 DRS patients, but present in type 2 DRS patients as well as in so me type 3 DRS patients. In terms of the presence or absence of the abducens nerv e, type 1 and type 2 DRS were homogenous, and type 3 DRS was heterogenous.

关键词：眼球后退综合征 Duane 眼科检查主要评价指标磁共振扫描展神经病例研究观察性

Ⅱ期子宫内膜癌:限制术后对无淋巴结转移的肿瘤患者行阴道穹隆的放疗

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世界核心医学期刊文摘（妇产科学分册） 2006年第1期2卷 45-46页

作者： Rittenberg P. V. C. Lotocki R. j. Heywood M. S. Krepart G. V. 张丽娟(译) P. V. C. Rittenberg. Department of Obstetrics and Gynecology Division of Gynecologic Oncology Dalhousie University 5820 University Avenue Halifax NS B3H 1V7 Canada 不详

. To evaluate the outcomes of patients with node-negative stage II endometrial cancer who received vault brachytherapy without external beam pelvic radiotherapy (EBRT). Methods. A retrospective review of all stage II endometrioid type endometrial cancer patients referred to Cancer Care Manitoba was undertaken between October 1995 and March 2001. Forty-nine patients were identified with disease confined to the uterus, but not all patients received extended surgical staging (ESS) with pelvic lymphadenectomy. These patients were evaluated for recurrence and morbidity data. Results. Twenty node-negative stage II cancers were identified. Three were treated without adjuvant treatment, 12 received vault brachytherapy and 5 received more conventional treatment with EBRT and vault brachytherapy. No recurrences or deaths occurred in these patients. Mean follow-up was 40 months. No surgical complications were encountered in this group and no morbidity from radiotherapy was observed. Conclusions. Limiting adjuvant treatment to vault brachytherapy for node-negative stage II endometrial cancer results in less morbidity and excellent survival and is worthy of further investi gation.

关键词： Ⅱ期子宫内膜癌无淋巴结转移肿瘤患者阴道穹隆放疗盆腔淋巴结清扫术术后辅助治疗死亡病例手术并发症

Effect of Varying Mobility on the Performance of MANET Protocols

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通讯和计算机（中英文版） 2011年第7期8卷 523-535页

作者： Ibrahiem M. M. El Emary Samir S. Malallah Shatha j. Kadhim King Abdulaziz University Jeddah Kingdom of Saudi Arabia Al Ahliyya Amman University Amman Jordan Faculty of Engineering Al Balqa Applied University Al Salt Jordan

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世界核心医学期刊文摘（皮肤病学分册） 2005年第3期1卷 42-42页

作者： Brasch j. Schnuch A. Geier j. 牛新武 Department of Dermatology U niversity of Schleswig-Hoktein Campus Kiel Schittenhelmstr. 7 D- 24105 Kie l Germany

Background: Iodopropynyl butylcarbamate (IPBC) is a new preservative in medic al and cosmetic leave-on products. Al-though cases of allergic contact derma titis to IPBC have been reported, it is not known whether the usual test concent ration of 0- 1% is appropriate for screening tests with IPBC. Objectives: To determine the concentration of IPBC that should be used in screening patch tests . Methods: An analysis was made of data filed by 26 centres of dermatology on pa tch tests performed with one or two concentrations of IPBC (0.1% , 0.2% , 0.3 % or 0.5% ) in 8106 unselected patients. Criteria used to determine the best test concentration of IPBC were the reaction index, the positivity ratio, the ra te of crescendo reactions, and the relations between IPBC reactions and theMOAHL FAindex irritant reactions to sodium lauryl sulphate (SLS), and allergic reactio ns to other contact allergens including preservatives. Results: IPBC 0.1% , 0.2 % , 0.3% and 0.5% yielded 0.5% , 0.8% , 1.3% and 1.7% positive reacti ons, but this increase was accompanied by an even greater increase in doubtful a nd irritant reactions. These figures and the other criteria examined suggested t he range of suitable test concentrations of IPBC to lie between 0.2% and 0.3% . A detailed analysis of MOAHLFA indices and of associations between reactions to IPBC and reactions to other allergens and to SLS showed that most of the posi tive reactions to IPBC 0.2% can be assumed to be allergic ones and that with I PBC 0.2% fewer false-positive reactions can be expected than with IPBC 0.3% . Conclusions: Patch testing with IPBC 0.2% is suggested for patients with ec zema possibly related to preservatives.

关键词：斑贴试验接触性变应原过敏性皮炎刺激反应阳性反应假阳性相关性分析筛选试验

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母牛营养对其女儿生长和繁殖性能的影响

中国畜牧兽医 2007年第5期34卷 156-156页

作者： j.L.Martin 淮亚红

我们用了3年时间研究了170头小母牛的母亲怀孕后期和泌乳早期营养对其生长和繁殖性能的影响,试验母牛按照2×2因素处理设计。怀孕后期试验组母牛或者每天补充0.45 kg含有42%的粗蛋白质补充料(PS组)或者不补充粗蛋白质(ns组)。在泌乳早... 详细信息

我们用了3年时间研究了170头小母牛的母亲怀孕后期和泌乳早期营养对其生长和繁殖性能的影响,试验母牛按照2×2因素处理设计。怀孕后期试验组母牛或者每天补充0.45 kg含有42%的粗蛋白质补充料(PS组)或者不补充粗蛋白质(ns组)。在泌乳早期试验中,所有来自怀孕后期处理组的母牛被饲喂干草或者放牧在地下灌溉的草场。试验结果表明,母牛营养对其女儿的出生日期和出生重影响不显著(P>0.10)。饲养在牧场和PS组的试验母牛其女儿205 d出生重要高于饲喂干草和ns处理组(P=0.02;P=0.07)。PS组母牛妊娠诊断女儿体重较大(P0.10)。怀孕后期和泌乳早期母牛营养对女儿初配年龄或青年母牛转群率没有影响(P>0.10)。泌乳早期母牛的营养差异对女儿受胎率影响差异不显著(P>0.10)。来自PS组母牛的女儿受胎率较高(P=0.05),并且在第一胎产犊季节的第21 d产犊的比例较高(P=0.005)。母牛营养对女儿的平均产犊时间、难产率以及初产季节犊牛出生重没有影响(P0.10)。母牛营养不影响女儿的平均日增重(ADG)或者饲料转化效率(G∶F)。如果泌乳早期母牛被饲喂干草,那么PS组母牛的女儿较ns组有较高的干物质摄入量(DMI)(P=0.09)和剩余采食量(P=0.07),但如果泌乳早期母牛被放牧在草场上,情况就不是这样。PS组母牛的女儿断奶重、初配体重、第一次妊娠诊断和第二次繁殖季节体重较高。在泌乳早期,放牧在草场的母牛女儿有较高的断奶重,而不是断奶后重。尽管初配年龄和青年母牛转群率相似,PS组母牛的女儿第一胎产犊季节在第21 d产犊的比例较高(P=0.05),并且受胎率比ns组母牛的女儿高。总之,这些结果表明母牛营养对女儿断奶后体重和繁殖率有影响。

关键词：受胎率胎儿发育青年母牛发育母体营养蛋白补充