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1铁岭组钾质斑脱岩锆石SHRIMP U-Pb年代学研究及其地质意义显示文摘最近在冀北-辽西以碳酸盐岩为主的铁岭组内发现了钾质斑脱岩,并获得其锆石SHRIMP U-Pb年龄——(1437±21)Ma,这一进展将铁岭组的时代确定为中元古代早期盖层纪(Calymmian Period)末期.与此同时,还在同一剖面获得了铁岭组的上覆地层——下马岭组碳硅质页岩里钾质斑脱岩锆石SHRIMPU-Pb年龄——(1372±18)Ma,这与稍早前在北京西北及其附近地区所获得的定年结果(~1380Ma)是一致的.这在肯定了该地区下马岭组应归入中元古代中期延展纪(Ectasian Period)早期的同时,也表明以蓟县剖面为代表的燕山东部地区铁岭组-下马岭组等相关序列,可与北京西山及燕山西部进行良好对比.换言之,华北北部从高于庄组到铁岭组的巨厚碳酸盐岩序列都应视为中元古界盖层系沉积,而铁岭组与下马岭组之间的不整合面可作为中元古界盖层系与延展系之间的物理性分界标志;早先以该不整合面命名的'芹峪上升'(或'芹峪运动')应属于一个时限短暂的中元古代早期的区域抬升,不能再视为华北克拉通对新元古代罗迪尼亚超大陆聚合事件(~1.0Ga)的响应.苏文博 李怀坤 HUFF W D ETTENSOHN F R 张世红 周红英 万渝生 2010科学通报2010,55,22:88
22019新型冠状病毒基因组特征和流行病学:病毒起源和受体结合的意义显示文摘研究者对来自9例新型冠状病毒肺炎住院患者的支气管肺泡灌洗液样本和培养的分离株进行了下一代测序。从这些个体中获得了严重急性呼吸综合征-冠状病毒2(severe acute respiratory syndrome-coronavirus 2,SARS-CoV-2)的完整和部分基因组序列。利用Sanger测序连接病毒重叠群以获得全长基因组,cDNA末端快速扩增确定终端区。对这些SARSCoV-2基因组和其他冠状病毒基因组进行了系统进化分析,以确定该病毒的进化史并有助于推断其可能的起源。刘青(译) 刘莉(审校) Lu R Zhao X Li J Niu P Yang B Wu H Wang W Song H Huang B Zhu N Bi Y Ma X Zhan F Wang L Hu T Zhou H Hu Z Zhou W Zhao L Chen J Meng Y Wang J Lin Y Yuan J Xie Z Ma J Liu WJ Wang D Xu W Holmes EC Gao GF Wu G Chen W Shi W Tan W 2020中华高血压杂志2020,28,3:516
3MicroRNA-34a inhibits glioblastoma growth by targeting multiple oncogenes显示文摘Li Y Guessous F Zhang Y Dipierro C Kefas B Johnson E Marcinkiewicz L Jiang J Yang Y Schmittgen TD Lopes B Schiff D Purow B Abounader R 2009中国神经肿瘤杂志2009,7,4:56
4最新AD研究用诊断标准:IWG-2标准显示文摘在过去的8年中,国际工作组织(IWG)和美国国立老化研究院-阿尔茨海默协会(NIA-AA)建立了阿尔茨海默病(AD)诊断标准,它能更好地定义AD的临床表型,整合了生物标记物于诊断流程中,并覆盖了疾病的全程。本意见书充分地权衡了IWG标准的优缺点,建议改进诊断框架。依据这些改进,AD的诊断变得简单,只要有恰当的AD临床表型(典型或不典型)和与AD的病理相一致的病理生理学生物标志物出现。我们认为疾病的下游的定位性生物标志,如容积性磁共振成像(MRI)和氟脱氧葡萄糖-正电子发射型计算机断层成像(FDG-PET)等,适合更好地测量和监测疾病过程。本文还详述了非典型性AD、混合性AD和AD临床前期的特异诊断标准。陈刚 曹雯炜 俞羚 糜建华 Dubois B Feldman HH Jacova C Hampel H Molinuevo JL Blennow K DeK osky ST Gauthier S Selkoe D Bateman R Cappa S Crutch S Engelborghs S Frisoni GB Fox NC Galasko D Habert MO Jicha GA Nordberg A Pasquier F Rabinovici G Robert P Rowe C Salloway S Sarazin M Epelbaum S de Souza LC Vellas B Visser PJ Schneider L Stern Y Scheltens P Cummings JL 2014神经病学与神经康复学杂志2014,11,3:31
5SHRIMP U-Pb dating for a K-bentonite bed in the Tieling Formation,North China显示文摘A SHRIMP U-Pb zircon age of 1437±21 Ma was obtained for a recently discovered K-bentonite bed in the Tieling Formation,situated northeast of Beijing at the boundary between Liaoning and Hebei provinces,on the northern margin of the North China Craton(NCC).The SHRIMP U-Pb age places Tieling Formation near the end of the Calymmian Period of the early Mesoproterozoic Era.In addition,a SHRIMP U-Pb zircon date of 1372±18 Ma was acquired for K-bentonite beds in the overlying,dark-shale-dominated Xiamaling Formation from the same location northeast of Beijing.This date assigns a similar Mid-Mesoproterozoic(Ectasian Period) age for the Xiamaling Formation,as have previously determined dates from other sections northwest of Beijing.These dates indicate that the Tieling and Xiamaling formations,as well as the related succession in the eastern part of the Yanshan Mountains,represented by the well-known Meso-to Neoproterozoic standard section in Jixian,can be correlated well with sections northwest of Beijing in the western part of the Yanshan Mountains.In other words,the boundary between the Calymmian and Ectasian periods in the northern parts of the NCC is marked by the unconformity between the Tieling and Xiamaling formations in the northern NCC.This boundary was previously ascribed to the 'Qinyu Orogeny' and thought to be of Grenville age.In this regard,the conventional 'Qinyu Orogeny' should now be regarded as a short-lived regional uplift during Early Mesoproterozoic time,rather than a result from the Grenvillian assembly of the NCC to the Rodinia Supercontinent(~1.0 Ga).SU WenBo LI HuaiKun HUFF W D ETTENSOHN F R ZHANG ShiHong ZHOU HongYing WAN YuSheng 2010Chinese Science Bulletin2010,55,29:30
6OPTICAL PROPERTIES OF GeO_2 AND Ge NANOCRYSTALS显示文摘he co m pound m aterial of n m size particles Ge O2 Si O2 w as synthesied through hydrolysis of Si( O C2 H4) and Ge Cl4 . A heat treatm ent w as carried out for the sa m ples at 100 ~1200 ℃in air . Its optical property w as deter mined by U V Vis spectur m . We have found that theabsorption edge of spectru m shifted progressively to longer w avelengths . The quantu m size ef fect of nanocrystals appears because crystals gro w and energy of optical band gap reduces d ueto the influence of te m perature . By the analysis of X ray diffraction w e have observed theprocess in w hich the structure of particles changed fro m disorder into order .Y.H.Zhou 1) ,Y.Y.Feng 2) and H.Y.Lu 2) 1)Department of Physics Nanjing Normal University, Nanjing 210097,China 2)Physics and Ch寁O P T I C A L P R O P E R T I E S O F Ge O2 A N D Ge N A N O C R Y S T A L S Y. H. Zhou1) , Y. Y. Feng2) 1999Acta Metallurgica Sinica(English Letters)1999,12,5:22
7血管性认知障碍的诊断标准:国际血管性行为与认知障碍学会的申明显示文摘长期以来,脑血管病(CVD)就被认为是认知损害的一个重要原因,但是有关脑血管病后认知障碍的概念化却有着一段多变的历史。'动脉变硬'或脑的动脉粥样硬化是'老化'的原因,是存在已久的观点,在20世纪60年代受到了来自英格兰纽卡斯尔的神经病理学研究的质疑。这些研究表明,血管性痴呆(vascular dementia,Va D)与超过一定程度的多发性脑梗死有关。徐岩 郭起浩 Sachdev P Kalaria R O'Brien J Skoog I Alladi S Black SE Blacker D Blazer DG Chen C Chui H Ganguli M Jellinger K Jeste DV Pasquier F Paulsen J Prins N Rockwood K Roman G Scheltens P 2014神经病学与神经康复学杂志2014,11,3:19
8Ⅰ期癌症患者切除淋巴结内隐匿性微小转移癌灶的检查及其临床病理意义显示文摘目的 检查癌症患者切除淋巴结内有无微小癌转移 ,具有临床、病理重要性。方法 350例 期癌症患者包括非小细胞肺癌 94例 ,乳腺癌 112例 ,食管癌 115例及外阴癌 2 9例病理报告无癌转移的淋巴结 3715枚。应用单克隆抗细胞角蛋白 ( AE1/ AE3)、抗上皮细胞膜 ( EMA) ,及多克隆抗角蛋白抗体进行免疫组化染色重新检查。结果 所有病例的 32 .3% ( 113/ 350 )、被检淋巴结的 5.5%( 2 0 3/ 3715)有淋巴结内隐匿性肿瘤转移。肺癌患者及被检淋巴结的阳性率均比其他肿瘤高。肺鳞癌58%、腺癌 53.8%的淋巴结为阳性 ,分别比食管鳞癌 2 2 .5%、外阴鳞癌 10 .3%及乳腺癌 2 7.7%高 ( P<0 .0 5)。部分乳腺癌患者术后随访显示 :淋巴结阳性患者比阴性者预后更差 ( P<0 .0 5)。结论 说明免疫组化技术可大大提高淋巴结微小癌转移的检出率 ,其阳性率的不同可能与患者的临床经过甚至癌患者的死亡率相关联。陈朝伦 卢晓梅 黄绒 黎音 古丽娜尔 沈宝茵 A J Cochran D R Wen W F Coulson 1997中华肿瘤杂志1997,19,1:16
9幽门螺杆菌感染处理的当前观念——MaastrichtⅢ共识报告显示文摘名词缩写欧洲幽门螺杆菌研究小组:European Helicobacter Study Group,EHSG胃食管反流病:gastro-esophageal reflux disease。P Malfertheiner F Megraud C O'Morain F Bazzoli E El-Omar D Graham R Hunt T Rokkas N Vakil EJ Kuipers 朱琦 2007胃肠病学2007,12,3:15
10Diagnostic accuracy of endoscopic ultrasound in pancreatic neuroendocrine tumors: A systematic review and meta analysis显示文摘AIM: To detect pancreatic neuroendocrine tumors (PNETs) has been varied. This study is undertaken to evaluate the accuracy of endoscopic ultrasound (EUS) in detecting PNETs.METHODS: Only EUS studies confirmed by surgery or appropriate follow-up were selected. Articles were searched in Medline, Ovid journals, Medline nonindexed citations, and Cochrane Central Register of Controlled Trials and Database of Systematic Reviews. Pooling was conducted by both fixed and random effects model). RESULTS: Initial search identified 2610 reference articles, of these 140 relevant articles were selected and reviewed. Data was extracted from 13 studies (n = 456) which met the inclusion criteria. Pooled sensitivity of EUS in detecting a PNETs was 87.2% (95%CI: 82.2-91.2). EUS had a pooled specificity of 98.0% (95%CI: 94.3-99.6). The positive likelihood ratio of EUS was 11.1 (95%CI: 5.34-22.8) and negative likelihood ratio was 0.17 (95%CI: 0.13-0.24). The diagnostic odds ratio, the odds of having anatomic PNETs in positive as compared to negative EUS studies was 94.7 (95%CI: 37.9-236.1). Begg-Mazumdar bias indicator for publication bias gave a Kendall's tau value of 0.31 (P = 0.16), indication no publication bias. The P for χ2 heterogeneity for all the pooled accuracy estimates was > 0.10. CONCLUSION: EUS has excellent sensitivity and specificity to detect PNETs. EUS should be strongly considered for evaluation of PNETs.Srinivas R Puli Nikhil Kalva Matthew L Bechtold Smitha R Pamulaparthy Micheal D Cashman Norman C Estes Richard H Pearl Fritz-Henry Volmar Sonu Dillon Michael F Shekleton David Forcione 2013World Journal of Gastroenterology2013,19,23:14
11肽酰基精氨酸脱亚氨酶4和中性粒细胞胞外诱捕网形成在实验性动脉粥样硬化和动脉损伤中的作用:浅表糜烂的影响显示文摘中性粒细胞可能促进人类动脉粥样硬化的血栓并发症的发生。特别是中性粒细胞胞外诱捕网(neutrophil extracellular traps,NETs)可加剧局部炎症,并放大和加剧动脉内膜损伤和血栓形成。肽酰基精氨酸脱亚氨酶4(peptidyl arginine deiminase 4,PAD4)参与NET的形成,但对该酶在动脉粥样硬化血栓形成中的作用的认识仍然不足。刘青 叶鹏 Franck G Mawson TL Folco EJ Molinaro R Ruvkun V Engelbertsen D Liu X Tesmenitsky Y Shvartz F Sukhova GK Michel JB Nicoletti A Lichtman AH Wagner DD Croce KJ Libby P 2018中华高血压杂志2018,26,5:13
12Phase angle obtained by bioelectrical impedance analysis independently predicts mortality in patients with cirrhosis显示文摘AIM To evaluate the prognostic value of the phase angle(PA)obtained from bioelectrical impedance analysis(BIA) for mortality prediction in patients with cirrhosis. METHODS In total, 134 male cirrhotic patients prospectively completed clinical evaluations and nutritional assessment by BIA to obtain PAs during a 36-mo follow-up period. Mortality risk was analyzed by applying the PA cutoff point recently proposed as a malnutrition marker(PA ≤ 4.9°) in Kaplan-Meier curves and multivariate Cox regression models. RESULTS The patients were divided into two groups according to the PA cutoff value(PA > 4.9°, n = 73; PA ≤ 4.9°, n = 61). Weight, height, and body mass index were similar in both groups, but patients with PAs > 4.9° were younger and had higher mid-arm muscle circumference, albumin, and handgrip-strength values and lower severe ascites and encephalopathy incidences, interleukin(IL)-6/IL-10 ratios and C-reactive protein levels than did patients with PAs ≤ 4.9°(P ≤ 0.05). Forty-eight(35.80%) patients died due to cirrhosis, with a median of 18 mo(interquartile range, 3.3-25.6 mo) follow-up until death. Thirty-one(64.60%) of these patients were from the PA ≤ 4.9° group. PA ≤ 4.9° significantly and independently affected the mortality model adjusted for Model for End-Stage Liver Disease score and age(hazard ratio = 2.05, 95%CI: 1.11-3.77, P = 0.021). In addition, Kaplan-Meier curves showed that patients with PAs ≤ 4.9° were significantly more likely to die. CONCLUSION In male patients with cirrhosis, the PA ≤ 4.9° cutoff was associated independently with mortality and identified patients with worse metabolic, nutritional, and disease progression profiles. The PA may be a useful and reliable bedside tool to evaluate prognosis in cirrhosis.Giliane Belarmino Maria Cristina Gonzalez Raquel S Torrinhas Priscila Sala Wellington Andraus Luiz Augusto Carneiro D'Albuquerque Rosa Maria R Pereira Valéria F Caparbo Graziela R Ravacci Lucas Damiani Steven B Heymsfield Dan L Waitzberg 2017World Journal of Hepatology2017,9,7:11
13结直肠癌腹膜转移高风险患者进行二次探查手术加腹腔热灌注化疗与随访的比较(PRO⁃PHYLOCHIP–PRODIGE15):一项随机的3期研究显示文摘背景:如果在结直肠癌腹膜转移出现症状之前就能够早期诊断和治疗,可以提高患者生存率。我们研究的目的是在结直肠癌腹膜转移的高风险患者中,探究进行有计划的二次探查手术加腹腔热灌注化疗(hyperthermic intraperitoneal chemo-therapy,HIPEC)是否可以给患者带来生存获益。张荣欣 GOéRé D GLEHEN O QUENET F 2020结直肠肛门外科2020,26,5:9
14非诺贝特治疗与2型糖尿病患者长期心血管病风险的关系显示文摘2型糖尿病患者心血管病风险高,部分原因在于高三酰甘油和低高密度脂蛋白胆固醇血症。而在他汀类药物治疗基础上,加强降低三酰甘油治疗,能否降低这种风险尚不清楚。该研究的目的是在使用他汀类药物治疗的2型糖尿病患者中,确定非诺贝特能否降低心血管病风险。刘莉 叶鹏 Elam MB Ginsberg HN Lovato LC Corson M Largay J Leiter LA Lopez C O'Connor PJ Sweeney ME Weiss D Friedewald WT Buse JB Gerstein HC Probstfield J Grimm R Ismail-Beigi F Goff DC Jr Fleg JL Rosenberg Y Byington RP ACCORDION study investigators 2017中华高血压杂志2017,25,6:7
15澳大利亚肉类标准和分级体系显示文摘澳大利亚肉类标准(meat standards Australia,MSA)是一个肉类全面质量管理系统,旨在为消费者提供一个肉类食用品质的准确描述。MSA已经通过对消费者进行大规模的品尝实验,确定了牛肉供应链中影响牛肉可口性的生产、屠宰、加工和价值以及各个生产环节的关键控制点(critical control points,CCPs)评分。这些关键控制点评分通过两种方式管理牛肉的可口性。首先,屠宰加工领域的关键控制点一直作为胴体评分的强制性标准;其次,其他生产和加工领域的关键点控制评分被合并到一个模型当中,用来预测不同个体肌肉和烹饪技巧的可口性。MSA模型可以用来支持新的营销创新。已经有充分的证据表明,消费者愿意为优质牛肉付出高价。目前已出现几个零售的例子采用MSA可口性评分来给牛肉定价。这样胴体价值的计算方法即为每块零售肉质量乘以不同质量评分的价格,并按照零售价的比例支付牛肉生产者。该系统可以用不同的胴体性状相关的经济权重来计算。由于等级是基于持续的质量规模,生产者在这个系统中的质量和产量方面即便小有增加,也会获得相应的经济回报。MSA系统已经支撑了一个新的和创新的营销系统,该系统的定价是透明的,可以帮助生产者对肉品的质量和产量的调整作出明智的决定。MSA系统不仅在澳大利亚有效地用于预测牛肉的可口性,而且在其他国家也都证明了其应用的有效性。在欧洲启动的ProSafeBeef项目也表明,欧洲也可用类似MSA的系统进行肉类的分级。R POLKINGHORNE J M THOMPSON J F HOCQUETTE D W PETHICK 霍云龙 孟庆祥 2015肉类研究2015,29,2:6
16Mapping QTL associated with Verticillium dahliae resistance in the cultivated strawberry(Fragaria×ananassa)显示文摘A biparental cross of octoploid strawberry segregating for resistance to Verticillium dahliae,the causative agent of Verticillium wilt,was screened under field conditions for three seasons.Average wilt scores were significantly associated with multiple QTL,which were mostly significant across all years.Markers significantly associated with the traits were used to screen material with known wilt resistance and susceptibility phenotypes.A clear and statistically significant relationship was observed between resistant,tolerant and susceptible material and the total number of markers present in the different resistance classes.In field situations resistance QTL appear to behave in an additive manner.These markers are abundant in the cultivated strawberry germplasm indicating that,despite the large number of markers,clear genetic gain is possible through marker-assisted breeding.L Antanaviciute NŠurbanovski N Harrison K J McLeary D W Simpson F Wilson D J Sargent R J Harrison 2015Horticulture Research2015,2,1:5
17健康领域的文化能力显示文摘1背景 尽管人类对其他社会的兴趣纵贯历史的各个阶段,但是检验不同文化概念对人类健康实践的影响从20世纪才开始,当时是伴随着长期的人类学田野调查产生的,这些田野调查揭露了不同文化之间相关卫生实践的多样性、复杂性和连续性。Napier A D Ancarno C Butler B Calabrese j Chater A Chatterjee H Guesnet F Home R Jacyna S Jadhav S Macdonald A Neuendorf U Parkhurst A Reynolds R Scambler G Shamdasani S Smith S Z Stougaard-Nielsen J Thomson L Tyler N Volkmann A M Walker T Watson J Williams AC Willott C Wilson J Woolf K 2016中国卫生政策研究2016,9,2:5
18肠道衍生的血清脂多糖与心房颤动患者主要不良心血管事件的风险增加相关:地中海膳食的影响显示文摘肠道微生物群正在成为动脉粥样硬化血栓形成的新型危险因素,但肠道衍生的脂多糖的预测作用尚不清楚。来自意大利罗马Sapienza大学的Pastori等进行了一项前瞻性单中心研究,分析了脂多糖与心房颤动中主要不良心血管事件(major adverse cardiovascular events,MACE)之间的关系,以及坚持地中海膳食(Mediterranean diet,Med-diet)对上述关系的影响。刘莉 叶鹏 Pastori D Carnevale R Nocella C Novo M Santulli M Cammisotto V Menichelli D Pignatelli P Violi F 2017中华高血压杂志2017,25,9:5
19Guidelines and Good Clinical Practice Recommendations for Contrast Enhanced Ultrasound (CEUS) - Update 2008显示文摘M Claudon D Cosgrove T Albrecht L Bolondi M Bosio F Calliada J.-M Correas K Darge C Dietrich M D’Onofrio D Evans C Filice L Greiner K J?ger N Jong E Leen R Lencioni D Lindsell A Martegani S Meairs C Nols?e F Piscaglia P Ricci G Seidel B Skjoldbye L Solbia 2008Ultraschall in Med2008,,01:4
20Leitlinien für den Gebrauch von Ultraschallkontrastmitteln - Januar 2004显示文摘T Albrecht M Blomley L Bolondi M Claudon J.-M Correas D Cosgrove L Greiner K J?ger N Jong E Leen R Lencioni D Lindsell A Martegani L Solbiati L Thorelius F Tranquart H Weskott T Whittingham 2004Ultraschall in Med2004,,04:3
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