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剖宫产手术部位感染病原菌分布及危险因素调查

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中国卫生检验杂志 2020年第16期30卷 2021-2024页

作者：徐彩娃永康市妇幼保健院检验科浙江永康321300

目的了解剖宫产手术部位感染病原菌分布及危险因素,为防范和医治手术部位感染提供依据。方法通过回顾性分析方法,对某医院行剖宫产手术部位感染病原菌检测结果进行统计分析。结果共调查1 028例,发生术后手术部位感染75例,感染率为7.30%... 详细信息

目的了解剖宫产手术部位感染病原菌分布及危险因素,为防范和医治手术部位感染提供依据。方法通过回顾性分析方法,对某医院行剖宫产手术部位感染病原菌检测结果进行统计分析。结果共调查1 028例,发生术后手术部位感染75例,感染率为7.30%。共分离出病原菌97株,其中革兰阳性菌占32.99%,革兰阴性菌占67.01%;居前三位分别是大肠埃希菌、铜绿假单胞菌、金黄色葡萄球菌。主要革兰阴性菌对阿米卡星、头孢哌酮/舒巴坦等抗菌药物的耐药率较低,金黄色葡萄球菌对青霉素的耐药率> 80.0%。多因素分析显示,BmI≥25 kg/m2、急诊手术、阴道指检次数≥5次、手术时间> 1 h、术中出血量> 500 ml、术前导尿、留置尿管时间≥24 h、采用循证护理是剖宫产患者手术部位感染的相关因素(P <0.05)。结论剖宫产手术部位感染病原菌主要以革兰阴性菌为主,以大肠埃希菌为主,病原菌的耐药性尚可,感染危险因素明确,有针对性地防控措施可有效预防手术切口感染。

关键词：剖宫产手术部位感染病原菌危险因素防控措施

modulation of the suppressive effect of corticosterone on adult rat hippocampal cell proliferation by paroxetine

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Neuroscience Bulletin 2007年第3期23卷 131-136页

作者：邱光 Daiga m.HELmESTE Asanka N.SAmARANAYAKE 刘汇文李湄珍邓兆华苏国辉香港大学医学院解剖学系加州大学尔湾分校精神医学系香港大学医学院精神医学系香港大学社会科学院心理学系脑神经心理实验室

Objective The literature has shown that cognitive and emotional changes may occur after chronic treatment with glucocorticoids. This might be caused by the suppressive effect of glucocorticoids on hippocampal neurogenesis and cell proliferation. Paroxetine, a selective serotonin reuptake transporter, is a commonly used antidepressant for alleviation of signs and symptoms of clinical depression. It was discovered to promote hippocampal neurogenesis in the past few years and we wanted to investigate its interaction with glucocorticoid in this study. methods Adult rats were given vehicle, corticosterone, paroxetine, or both corticosterone and paroxetine for 14 d. Cell proliferation in the dentate gyrus was quantified using 5-bromo-2-deoxyuridine （BrdU） immunohistochemistry. Results The corticosterone treatment suppressed while paroxetine treatment increased hippocampal cell proliferation. more importantly, paroxetine treatment could reverse the suppressive effect of corticosterone on hippocampal cell proliferation. Conclusion This may have clinic application in preventing hippocampal damage after glucocorticoid treatment.

关键词： paroxetine bromodeoxyuridine corticosterone hippocampus cell proliferation neurogenesis

孕震断层锁固段累积损伤导致失稳的自组织-临界行为特征

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物理学报 2018年第20期67卷 417-426页

作者：吴晓娲秦四清薛雷杨百存张珂北京工业大学建筑工程学院北京100124 中国科学院地质与地球物理研究所中国科学院页岩气与地质工程重点实验室北京100029 中国科学院地球科学研究院北京100029 中国科学院大学地球与行星科学学院北京100049

弄清锁固段(岩石)破裂过程中自组织临界性的物理涵义,对正确认识地震可预测性问题等具有重要意义.本文指出锁固段破裂过程存在两个临界点,第一临界点为体积膨胀点,是自组织过程起点,在该点锁固段发生可判识的高能级破裂事件,这可视为锁... 详细信息

弄清锁固段(岩石)破裂过程中自组织临界性的物理涵义,对正确认识地震可预测性问题等具有重要意义.本文指出锁固段破裂过程存在两个临界点,第一临界点为体积膨胀点,是自组织过程起点,在该点锁固段发生可判识的高能级破裂事件,这可视为锁固段宏观破裂前的惟一可识别前兆;第二临界点为峰值强度点,即失稳点,在该点发生通常有明显地表破裂带的大地震.基于以前研究给出的两者之间应变比理论关系以及地震震级与能量约束关系,可预测锁固段在第一和第二临界点处发生的某些标志性地震,并已得到诸多震例分析的支持.本文研究结果表明:由于锁固段是非均匀介质,其失稳前必须出现自组织过程,自组织是"因",临界失稳是"果",正是因为自组织过程的存在,才使得对某些大地震(如标志性地震)的预测成为可能;两个临界点之间的破裂演化过程并不是瞬态行为,通常是一个长期过程,该过程中标志性地震的发生遵循确定性规律,并不存在小地震直接导致大地震(如标志性地震)的级联效应.

关键词：自组织临界失稳沙堆模型锁固段

Color change in a marine isopod is adaptive in reducing predation

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Current Zoology 2015年第4期61卷 739-748页

作者： Kristin m. HULTGREN Hannah mITTELSTAEDT Department of Biology Seattle University 901 12^th ave. Seattle WA 98122

Although background matching is a common form of camouflage across a wide diversity of animals, there has been surprisingly little experimental work testing the fitness consequences of this camouflage strategy, especially in marine ecosystems. In this study, we tested whether color camouflage enhances survival of the intertidal marine isopod Pentidotea （Idotea） wosnesenskii, quantified patterns of camouflage in different algal habitats, and examined how algal diet affected color change and growth using laboratory assays. In the field, isopods collected from two differently colored algal habitats （the brown alga Fucus distichus and the red alga Odonthaliafloccosa） matched the color of their respective algal habitats, and also differed significantly in body size： smaller red isopods were found on red algae, while larger brown isopods were found on brown algae. Predation ex- periments demonstrated these color differences had fitness benefits： brown isopods that matched their brown algae habitats sur- vived at higher rates than red unmatched isopods. Surprisingly, despite the propensity of isopods to match their algal habitats, algal diet had no effect on color change in color change experiments. Instead, isopods in all treatments turned browner, matching the color of the algal habitat that many isopods are found on as adults. In summary, our data supported our hypothesis that back- ground matching serves an adaptive function in reducing predation, with important evolutionary implications for explaining the wide variation in color change mechanisms in idoteid isopods [Current Zoology 61 （4）： 739-748, 2015].

关键词： Isopod Pentidotea wosnesenskii. Camouflage Crypsis Background matching Color change

The Early-middle Triassic Supervolcano in the Yangtze Block,South China and associated obstacles to biotic recovery

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Geoscience Frontiers 2024年第1期15卷 69-83页

作者： Haifeng Chen Hao Zou mSantosh Huawen Cao Franco Pirajno Changcheng Huang mingcai Hou State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengduSichuan 610059China College of Earth Science Chengdu University of TechnologyChengduSichuan 610059China School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China Department of Earth Science University of AdelaideAdelaideSA 5005Australia Yonsei Frontier Lab Yonsei UniversitySeoulSouth Korea Centre of Exploration Targeting The University of Western Australia35 Stirling HighwayCrawleyWA 6009Australia

The end-Permian mass extinction was one of the major global crises spanning the entire Early Triassic or *** of volcanos were one of the factors that delayed the biotic recovery after this *** eruptions can cause catastrophic effects on global environment,climate,and *** we investigate the tuff layers from Early-middle Triassic boundary in the Yangtze Block and identify a supervolcano eruption *** zircon U-Pb ages of the section-Langdai,section-Daijiagou and section-Longmendong tuff samples are 247.1±1.9 ma,247.6±2.0 ma and 247.7±1.7 ma,*** ages mark the Olenekian-Anisian *** zircon grains from the tuff layers have negativeεHf(t)(-15.3 to-0.8),two-stage Hf model(TDm2)ages(1.7 to 2.2 Ga)and display high-δ18O values(mostly>10‰).Clay minerals and quartz dominate the rock *** whole rock compositions show that the tuff layers were derived from magma of intermediate to felsic composition,which formed by the remelting of Paleoproterozoic materials of continental *** volcanic eruption site is located in the Jinshajiang-Ailaoshan-Song ma suture zone in the southwestern margin of the Yangtze Block.A combination of the closure of the Paleo-Tethys Ocean Basin and the collision of the Indochina Block and South China contributed to the eruption,which was a supervolcano eruption under the active continental margin arc *** speculate that this supervolcano eruption might have contributed to the delayed biotic recovery after the end-Permian mass extinction.

关键词： Early-middle Triassic Tuff layer Supervolcano Yangtze Block Biotic recovery

A Theoretical Study on the mechanism,Regio-chemistry of Non-Classical Addition of Silanes and H-E （E = H, B, Ge, Sn ＆ Pb） onto Alkynes by Electrophilic Transition-metal Complexes:A Protocol to markovnikov Addition Products

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A Theoretical Study on the Mechanism,Regio-chemistry of Non-...

Abdominal Pregnancy: About a Case Observed at the maternity of the Community University Hospital Center, Bangui, Central African Republic

中国化学会第九届全国量子化学学术会议

作者： Lung wa Chung and Yun-Dong Wu Department of Chemistry, The Hong Kong University of Science & Technology, Clear water Bay, Kowloon, Hong Kong

＜正＞Recently, Trost and Ball discovered that inter- and intra-molecular hydrosilylation of alkynes catalyzed by [CpRu（NCme）3]PF6 and [Cp*Ru（NCme）3]PF6 give the unusual markovnikov as well as 6-m-r and 7-m-r endo-dig products with exclusive trans stereoselectivity. Available mechanisms failed to explain these salient observations. Instead, a novel mechanistic pathway derived from our theoretical calculations successfully rationalized the experiments （Scheme 1）.

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Open Journal of Obstetrics and Gynecology 2021年第3期11卷 296-302页

作者： G. D. Kossa-Ko-Ouakoua A. Koirokpi S. matoulou-mbala wa-Ngogbe R. m’Betid-Degana E. Serdouma F. Kouandongui Bangue Songrou G. R. Dotte N. R. Ngbale A. Sepou Department of Gynecology and Obstetrics Community University Hospital Center Bangui Central African Republic Department of Gynecology and Obstetrics Sino-Central African Friendship University Hospital Center Bangui Central African Republic medical Imaging Department Community University Hospital Center Bangui Central African Republic medical Oncology Department Community University Hospital Center Bangui Central African Republic

Abdominal pregnancy is a life threat to both mother and fetus requiring surgery regardless of the age of pregnancy. We report a case of abdominal pregnancy, delivered by laparotomy with a live newborn. This is a 31-year-old woman with 34 weeks and 2 days of amenorrhea whose ultrasound showed an abdominal pregnancy. Laparotomy extracted a newborn female weighing 3000 grams with APGAR at birth rated at 7/10 at one minute. The postoperatives were simple. The patient was discharged on the 14th postoperative day on 20 mg methrotrexate injection once a week for four weeks.

关键词： Abdominal Pregnancy Laparotomy Live Newborn Central African Republic

m42高速钢电渣重熔及锻造退火后碳化物的析出

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钢铁 2017年第7期52卷 68-75页

作者：罗乙娲郭汉杰孙晓林北京科技大学冶金与生态工程学院北京100083 高端金属材料特种熔炼与制备北京市重点实验室北京100083 钢铁研究总院高温材料研究所北京100081

通过X射线衍射分析、光学显微镜和透射式电子显微镜观察以及相关热力学计算,对比研究了m42高速钢电渣锭及锻后退火两种状态所析出碳化物的类型、尺寸、分布及析出条件。得出m42高速钢电渣锭中的碳化物主要为mo_2C亚稳态碳化物和少量Cr_7... 详细信息

通过X射线衍射分析、光学显微镜和透射式电子显微镜观察以及相关热力学计算,对比研究了m42高速钢电渣锭及锻后退火两种状态所析出碳化物的类型、尺寸、分布及析出条件。得出m42高速钢电渣锭中的碳化物主要为mo_2C亚稳态碳化物和少量Cr_7C_3碳化物,mo_2C碳化物尺寸较大,主要呈层片状、纤维状和棒状沿晶界析出。锻造退火后的m42高速钢中碳化物类型主要为Cr_7C_3,VC和Fe_2mo_4C,平均尺寸小于10μm且分布均匀,形态以方形、不规则球形和小颗粒为主。m42高速钢电渣锭中的mo_2C在锻造过程中可以分解为Fe_2mo_4C和VC。根据冶金热力学计算得出,mo_2C和VC在固液两相区析出,析出温度分别为1 229和1 222℃;Cr_7C_3在固相中析出,析出温度为842℃。

关键词： m42高速钢碳化物电渣重熔锻造冶金热力学

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视神经脊髓炎谱系病60例临床特点分析

神经疾病与精神卫生 2015年第3期15卷 281-283页

作者：王成凤王明远新疆维吾尔自治区人民医院神经内科 830001

目的：探讨视神经脊髓炎谱系病（NmOSD）患者的临床特点。方法回顾性分析60例患者的临床症状、实验室检查、影像学资料和治疗效果，进行综合分析。结果 NmOSD多为复发型，平均发作间隔6个月。首次发病仅为视神经、脊髓或两者同时受累者... 详细信息

目的：探讨视神经脊髓炎谱系病（NmOSD）患者的临床特点。方法回顾性分析60例患者的临床症状、实验室检查、影像学资料和治疗效果，进行综合分析。结果 NmOSD多为复发型，平均发作间隔6个月。首次发病仅为视神经、脊髓或两者同时受累者分别占56．7％、35．0％和5.0％。首发症状可仅为腰背部、颈部、上肢疼痛及呃逆。视神经和脊髓受累间隔中位数为24个月。24％的脊髓受累的患者出现3级或3级以下的肌力减退。血清AQP4－Ab的阳性率为63．6％。4例脊髓病变为短节段。头颅m RI异常率为50．0％。结论首次发病累及部位以单纯视神经或单纯脊髓多见。部分患者首发症状可仅为腰背部、颈部、上肢疼痛或呃逆，易误诊。NmOSD脊髓受累存在大病灶、小症状特点。NmOSD早期治疗有效率高，但显著有效率低。

关键词：视神经脊髓炎谱系病视神经脊髓炎临床特点水通道蛋白4