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hn RNpL plays a negative role through repressing Setd2 in pDLCs osteogenic differentiation stimulated by SrCl2

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Hn RNPL plays a negative role through repressing Setd2 in PD...

世界华人消化杂志和World journal of Gastroenterology 2006年工作总结

2017全国口腔生物医学学术年会

作者： Xiaoshi jia Qiaoyun Long Richard j Miron jiwei Wang Yan Wei Min Wu Yufeng Zhang The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education Wuhan University Hubei Key Laboratory of Cell Homeostasis Hubei Key Laboratory of Developmentally Originated Disease Department of Biochemistry and Molecular Biology College of Life Sciences Wuhan University Department of periodontology Cell Therapy Institute College of Dental Medicine Nova Southeastern University Key Laboratory of Oral Medicine Guangzhou Institute of Oral Disease Stomatology Hospital of Guangzhou Medical University

Objectives:Osteoporosis has been shown to intensify bone loss caused by periodontitis and both share common risk *** strategy utilized to manage the disease has been via the release of Sr ions by Strontium Ranelate having a direct effect on preventing osteoclast activation and promoting osteoblast differentiation.

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世界华人消化杂志 2007年第2期15卷 197-198页

作者：张海宁张焕兰王晓瑜张敏李琪江艳马景云王先林朱丽红王静张建中刘晔陆卫杨兴霞马文华刘文峰毕伶白少华潘伯荣马连生世界胃肠病学杂志社

世群胃肠病学杂志社于2006-12-22在北京鹭鹭酒家东方店举行了第三次工作会议．总结了2006年《世界华人消化杂志》和《World journal of Gastroenterology》各项编辑出版工作，国家自然科学基金委员会杂志部祖广安主任出席了这次会议，... 详细信息

世群胃肠病学杂志社于2006-12-22在北京鹭鹭酒家东方店举行了第三次工作会议．总结了2006年《世界华人消化杂志》和《World journal of Gastroenterology》各项编辑出版工作，国家自然科学基金委员会杂志部祖广安主任出席了这次会议，并作了振奋人心的发言，在此，我们感谢国家自然科学基金委对WjG的资助、也感谢各位领导、编委、编辑、朋友、对我们工作的大力支持！现将2006年主要工作总结如下：

关键词：世界华人杂志社消化国家自然科学基金编辑出版工作胃肠病学委员会 WjG

Measurement of integrated luminosity and center-of-mass energy of data taken by BESⅢ at s^(1/2)=2.125 GeV

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Chinese physics C 2017年第11期41卷 1-9页

作者：麦迪娜 M.N.Achasov S.Ahmed 艾小聪 O.Albayrak M.Albrecht D.j.Ambrose A.Amoroso 安芬芬安琪白景芝 R.Baldini Ferroli 班勇 D.W.Bennett j.V.Bennett N.Berger M.Bertani D.Bettoni 边渐鸣 F.Blanchi E.Boger I.Boyko R.A.Briere 蔡浩蔡啸 O.Cakir A.Calcaterra 曹国富 S.A.Cetin j.Chai 常劲帆 G.Chelkov 陈刚陈和生陈江川陈玛丽陈实陈申见堪炫陈旭荣陈元柏程和平褚新坤 G.Cibinetto 代洪亮代建平 A.Dbeyssi D.Dedovich 邓子艳 A.Denig I.Denysenko M.Destefanis F.DEMori 丁勇董超董静董燎原董明义豆正磊杜书先段鹏飞范荆州方建房双世方馨方易 R.Farinelli L.Fava O.Fedorov F.Feldbauer G.Felici 封常青 E.Fiorauanti M.Fritsch 傅成栋高清高鑫磊高原宁高榛 I.Garzia K.Goetzen 龚丽龚文煊 W.Gradl M.Greco 顾旻皓顾运厅管颖慧郭爱强郭立波郭如盼郭玥郭玉萍 Z.Haddadi A.Hafner 韩爽郝喜庆 F.A.Harris 何康林 F.H.Heinsius T.Held 衡月昆 T.Holtmann 侯治龙胡琛胡海明胡继峰胡涛胡誉黄光顺黄金书黄性涛黄晓忠黄勇黄智玲 T.Hussain 纪全姬清平季晓斌季筱璐姜鲁文江晓山蒋兴雨焦健斌焦铮金大鹏金山 T.johansson A.julin N.Kalantar-Nayestanaki 康晓琳康晓坤 M.Kavatsyuk 柯百谦 p.Kiese R.Kliemt B.Kloss O.B.Kolcu B.Kopf M.Kornicer A.Kupsc W.Kühn j.S.Lange M.Lara p.Larin H.Leithoff C.Leng 李翠李澄李德民李飞李峰云李刚李海波李惠静李家才李瑾李康李科李蕾李培荣李启云李腾李卫东李卫国李晓玲李小男李学潜李郁博李志兵梁昊梁勇飞梁羽铁廖广睿林德旭刘冰刘北江刘春秀刘栋刘福虎刘芳刘峰刘宏邦刘汇慧刘欢欢刘怀民刘杰刘建北刘觉平刘晶译刘凯刘魁勇刘兰雕刘佩莲刘倩刘树彬刘翔刘玉斌刘媛媛刘振安刘智青 H.Loehner 龙云飞娄辛丑吕海江吕军光卢宇卢云鹏罗成林罗民兴 T.Luo 罗小兰吕晓睿马凤才马海龙马连良马明明马秋梅马天马旭宁马骁妍马玉明 F.E.Maas M.Maggiora Q.A.Malik 冒亚军毛泽普 S.Marcello j.G.Messchendorp G.Mezzadri 闵建闵天觉 R.E.Mitchell 莫晓虎莫玉俊 C.Morales Morales N.Yu.Muchnoi H.Muramatsu p.Musiol Y.Nefedov F.Nerling I.B.Nikolaev 宁哲 S.Nisar 牛顺利牛讯伊马鹏欧阳群 S.pacetti 潘越 p.patteri M.pelizaeus 彭海平 K.peters j.pettersson 平加伦平荣刚 R.poling V.prasad 漆红荣祁鸣钱森乔从丰秦丽清覃拈秦小帅秦中华邱进发 K.H.Rashid C.F.Redmer M.Ripka 荣刚 Ch.Rosner 阮向东 A.Sarantsev M.Savrié C.Schnier K.Schoenning S.Schumann 邵明沈成平沈培迅沈肖雁盛华义施萌宋维民宋欣颖 S.Sosio S.Spataro 孙功星孙俊峰孙胜森孙新华孙勇杰孙永昭孙志嘉孙振田唐昌建唐晓 I.Tapan E.H.Thorndike M.Tieinens I.Uman G.S.Varner 王斌王滨龙王东王大勇王科王亮亮王灵淑王萌王平王佩良王炜王维平王雄飞王越王雅迪王贻芳王亚乾王铮王志刚王志宏王至勇王宗源 T.Weber 魏代会 p.Weidenkaff 文硕频 U.Wiedner M.Wolke 伍灵慧吴连近吴智夏磊夏力钢夏宇肖栋肖浩肖振军谢宇广修青磊许国发徐静静徐雷徐庆君徐庆年徐新平严亮鄢文标闫文成颜永红杨海军杨洪勋杨柳杨永栩叶梅叶铭汉殷俊昊尤郑昀 Institute of High Energy physics G.I.Budker Institute of Nuclear physics SB RAS (BINp) the Novosibirsk State University Helmholtz Institute Mainz Carnegie Mellon University Bochum Ruhr-University University of Rochester University of Turin INFN University of Science and Technology of China State Key Laboratory of particle Detection and Electronics INFN Laboratori Nazionali di Frascati peking University Indiana University johannes Gutenberg University of Mainz INFN Sezione di Ferrara University of Minnesota joint Institute for Nuclear Research the Moscow Institute of physics and Technology Wuhan University Ankara University Istanbul Bilgi University the Functional Electronics Laboratory Tomsk State University University of Chinese Academy of Sciences Nanjing University Lanzhou University Huangshan College Shanghai jiao Tong University Liaoning University Nankai University Zhengzhou University Tsinghua University University of Ferrara University of Eastern piedmont GSI Helmholtzcentre for Heavy Ion Research GmbH Guangxi University Nanjing Normal University KVI-CART University of Groningen Henan Normal University University of Hawaii Shandong University University of the punjab Uppsala University Istanbul Arel University justus-Liebig-Universitaet Giessen Ⅱ.Physikalisches Institut Seoul National University Hangzhou Normal University Beijing Institute of petrochemical Technology Beihang University Sun Yat-Sen University Sichuan University Guangxi Normal University Shanxi University Central China Normal University Henan University of Science and Technology University of Texas at Dallas Zhejiang University University of Hawaii Honolulu University of Minnesota Minneapolis COMSATS Institute of Information Technology INFN and University of perugia Goethe University Frankfurt the NRC "Kurchatov Institute" PNPI Uludag University Near East University Soochow University Hunan University University of South China China Center of Advanced Science and Technology Bogazici University University of Science and Technology Liaoning

To study the nature of the state Y（2175）,a dedicated data set of e ＋ e-collision data was collected at the center-of-mass energy of 2.125 GeV with the BESⅢ detector at the BEpCⅡ *** analyzing large-angle Bhabha scattering events,the integrated luminosity of this data set is determined to be 108.49±0.02±0.85 pb-1,where the first uncertainty is statistical and the second one is *** addition,the center-of-mass energy of the data set is determined with radiative dimuon events to be 2126.55±0.03±0.85 MeV,where the first uncertainty is statistical and the second one is systematic.

关键词： Bhabha scattering luminosity radiative dimuon events center-of-mass energy

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参照人群中确诊超过20年的克罗恩病

世界核心医学期刊文摘（胃肠病学分册） 2005年第7期1卷 20-20页

作者： Etienney I. Bouhnik Y. Gendre j.- p. 翟惠虹 Hpital Lariboisière 2 rue Ambroise Paré 75475 Paris Cedex 10 France

Objectives - patients frequently ask questions about the lifetime prognosis of Crohn’ s disease. The aim of this study was to describe the outcomes of Cro hn’ s disease more than 20 years after diagnosis. Methods - Data from all pat ients with Crohn’ s disease whose diagnosis had been performed before 1st janua ry 1978 were analyzed. All referred patients filled in a medical and health- re lated quality- of- life questionnaire. Results - Among 273 patients with Cro hn’ s disease diagnosed more than 20 years ago, 141 (52% ) patients answered o ur questionnaire, 45 (16% ) patients were alive but did not wish to answer our questionnaire, 51 (19% ) could not be traced and 36 (13% ) died before july 19 98. At the end of follow- up, 25.7 (20.0- 59.3) years after diagnosis, 24% h ad a relapse in the previous 12 months, and 48% and 28% had quiescent diseas e with and without treatment, respectively. These ratios were not different from those observed three years after Crohn’ s disease diagnosis. Sixteen patients died within 20 years after CD diagnosis, including 11 from CD- related causes. The risk of death estimated by Kaplan- Meier life- tables analysis was non- s ignificantly higher if death was related to CD. An ileal or colic adenocarcinoma was noted in 6 (3.4% ) patients. Conclusions - Crohn’ s disease activity do es not burn out with time, and roughly one- quarter of the patients had active disease 20 years after diagnosis.

关键词：克罗恩病静止期结肠腺癌死亡风险生活质量死亡率表年所

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Concentrated Extract of Green Tea polyphenols Enhances the Toxicity of the Elderberry Lectin Nigrin b to Mice

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Food and Nutrition Sciences 2014年第5期5卷 466-471页

作者： pilar jiménez patricia Cabrero jesús Tejero Manuel j. Gayoso Manuel Garrosa Damián Cordoba-Diaz Manuel Cordoba-Diaz Tomás Girbés Biología Celular Histología y Farmacología Facul- tad de Medicina and INCYL (Instituto de Neurociencias de Castilla y León) Universidad de Valladolid Valladolid Spain Farmacia y Tecnología Farmacéutica Facultad de Farmacia and IUFI (Instituto Universitario de Farmacia Industrial) Universidad Complu- tense de Madrid Madrid Spain Nutrición y Bromatología Facultad de Medicina and CINAD (Centro de Investigación en Nutrición Alimentación y Dietética Edi- ficio LUCIA-Parque Científico) Universidad de Valladolid Valladolid Spain Nutrición y Bromatología Facultad de Medicina and CINAD (Centro de Investigación en Nutrición Alimentación y Dietética Edi- ficio LUCIA-Parque Científico) Universidad de Valladolid Valladolid Spain

The effect of the administration of large amounts of green tea polyphenols is a matter of controversy. We explored whether a polyphenol mixture from a concentrated green tea extract (polyphenon 60) could alter the effects on mice of the type 2 (two chains) ribosome-inactivating protein nigrin b isolated from Sambucus nigra L. Nigrin b triggers specific reversible toxic effects on the mouse intestines featured by apoptosis of mice Lieberkühn crypt cells upon parenteral administration of sub-lethal amounts. Independent administration to mice of 30 mg/kg body weight of polyphenon 60 by oral gavage or 10 mg/kg body weight of nigrin b administered via the intraperitoneal route (i.p.) did not affect survival. In contrast, the simultaneous treatment greatly enhanced nigrin b toxicity leading to the death of some animals. The histological analysis revealed that the most serious injury was inflicted on the small intestine crypts, which disappeared, and on the liver, which evidenced hepatotoxicity showing haemorrhagic areas. These findings raise concerns about the abuse of high concentrations of green tea polyphenols especially when the intestinal mucosa is damaged, for instance by toxins or therapeutic drugs.

关键词： Green Tea polyphenols Nigrin b Model Ribosome-Inactivating protein Lectin Small Intestine Liver Apoptosis

时间分辨FTESR对光诱导蒽醌—2，6—二磺酸与α—氨基酸电子转移反应和脱羧反应的研究

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时间分辨FTESR对光诱导蒽醌—2，6—二磺酸与α—氨基酸电子转移...

散发性错配修复缺陷大肠癌的临床及分子生物学特征

第十一届全国波谱学学术会议

作者：吴隆民 GEIMER,j BECKERT．D 应用有机化学国家重点实验室兰州大学化学暨矿物学学院莱比锡大学

含有蒽醌—2,6—二磺酸的强碱性的α—氨基酸 (α—甘氨酸,L—α—丙氨酸,α—氨基异丁酸) 水溶液受到激光 (λ=308 nm,10ns,～20 mj)幅照后,应用时间分辨的 FTESR 技术在激光脉冲后48 纳秒即检测到短寿命的三重态极化的蒽醌—2,6—二...

含有蒽醌—2,6—二磺酸的强碱性的α—氨基酸 (α—甘氨酸,L—α—丙氨酸,α—氨基异丁酸) 水溶液受到激光 (λ=308 nm,10ns,～20 mj)幅照后,应用时间分辨的 FTESR 技术在激光脉冲后48 纳秒即检测到短寿命的三重态极化的蒽醌—2,6—二磺酸阴离子自由基和自旋极化的氨基烷基中性自由基。FTESR 波谱结果表明光激发三重态蒽醌—2,6—二磺酸经由电子转移将α—氨基酸氧化成对应的正离子自由基 hn(+·)CRRCOO,该正离子自由基随后经历一个快速的脱羧过程生成氨基烷基中性自由基。以上结果在重水的实验中得到进一步证实。反应机理(以α—甘氨酸为例)建议如下： (?)

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临床与实验病理学杂志 2000年第4期16卷 290-293页

作者：孙孟红 j Gebert Mv Knebel Doeberitz 上海医科大学肿瘤医院病理科分子病理室 200032 DivisionofMolecularDiagnosisandTherapy DeptofSurgeryUniversityofHeidelberg

目的 :探讨散发性大肠癌中表现微卫星不稳定性 (microsatelliteinstability ,MSI)大肠癌的临床病理和分子生物学特征。方法 :79例未接受术前抗肿瘤治疗的大肠癌根治术组织收入研究 ,分析 14个微卫星位点、K ras基因和TGFβ RII基因异常... 详细信息

目的 :探讨散发性大肠癌中表现微卫星不稳定性 (microsatelliteinstability ,MSI)大肠癌的临床病理和分子生物学特征。方法 :79例未接受术前抗肿瘤治疗的大肠癌根治术组织收入研究 ,分析 14个微卫星位点、K ras基因和TGFβ RII基因异常。结果 :30 / 79例 (38% )大肠癌显示不同程度MSI。 11/ 79(14% )显示高度MSI(≥ 3个位点 ) ,其中 9例 (81% )显示TGFβ RII基因 (A) 10处的框架移位 ,而只有 1/ 10 (10 % )肿瘤带有K ras基因突变 ,这组患者有较好预后的倾向 ;低度MSI肿瘤在≤ 2位点中显示MSI ,其分子生物学特征与非MSI肿瘤无差异。结论 :肿瘤示高度MSI的患者 ,其临床病理及分子生物学特征与hn pCC相似 ,并有较好预后的倾向。应在诊治过程中注意鉴别这组患者。

关键词：微卫星不稳定性错配修复大肠癌分子生物学

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美国中东部水生野生鸟类禽冠状病毒的鉴定

中国畜牧兽医 2014年第12期41卷 196-196页

作者： jordan B j 董晓云

冠状病毒(CoVs)因其具有广泛的遗传多样性、传代时间短及突变率高等特征而呈全球分布,其传染性很强,难以控制。本研究报道了水生野生鸟类冠状病毒的遗传多样性,水生野生鸟类可能是禽冠状病毒潜在的储存器及突变和重组病毒的宿主,从而导... 详细信息

冠状病毒(CoVs)因其具有广泛的遗传多样性、传代时间短及突变率高等特征而呈全球分布,其传染性很强,难以控制。本研究报道了水生野生鸟类冠状病毒的遗传多样性,水生野生鸟类可能是禽冠状病毒潜在的储存器及突变和重组病毒的宿主,从而导致产生新的血清型或属。本试验从禽流感阴性的美国水生野生鸟类的700份蛋样本和303份直接泄殖腔拭子样本中检测到133份混合样品。从冷冻样品分离RNA,并利用已发布的1对通用冠状病毒引物进行RT-pCR。测试的样本中,1份来自翻石鹬的样本为冠状病毒阳性,与鸭冠状病毒(DK/CH/hn/ZZ2004)具有核苷酸序列相似性。这些数据表明冠状病毒可能在美国东半部水生野生鸟类中呈低流行态势。

关键词：泄殖腔拭子 RT-pCR 鸭冠状病毒储存器野生鸟类

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Observations of the Cabibbo-Suppressed decays ■→nπ+π0,nπ+π-π+and the Cabibbo-Favored decay ■→nK-π+π+

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Chinese physics C 2023年第2期 5-22页

作者：麦迪娜 M.N.Achasov p.Adlarson M.Albrecht R.Aliberti A.Amoroso 安美儒安琪白羽 O.Bakina R.Baldini Ferroli I.Balossino 班勇 V.Batozskaya D.Becker K.Begzsuren N.Berger M.Bertani D.Bettoni F.Bianchi E.Bianco j.Bloms A.Bortone I.Boyko R.A.Briere A.Brueggemann 蔡浩蔡啸 A.Calcaterra 曹国富曹宁 S.A.Cetin 常劲帆常万玲车国荣 G.Chelkov 陈琛陈超陈刚陈和生陈玛丽陈申见陈少敏 T.Chen 陈旭荣 X.T.Chen 陈元柏陈卓俊成伟帅 S.K.Choi 初晓 G.Cibinettov F.Cossio 崔佳佳代洪亮代建平 A.Dbeyssi R.E.de Boer D.Dedovich 邓子艳 A.Denig I.Denysenko M.Destefanis F.De Mori 丁勇丁逸董静董燎原董明义董翔杜书先段宗欢 p.Egorov 范玉兰方建房双世方文兴方易 R.Farinelli L.Fava69B F.Feldbauer G.Felici 封常青冯俊华 K Fischer M.Fritsch C.Fritzsch 傅成栋高涵高原宁高扬 S.Garbolino I.Garzia 葛潘婷葛振武耿聪 E.M.Gersabeck A Gilman K.Goetzen 龚丽龚文煊 W.Gradl M.Greco 谷立民顾旻皓顾运厅关春懿郭爱强郭立波郭如盼郭玉萍 A.Guskov 韩文颖郝喜庆 F.A.Harris 何凯凯何康林 F.H.Heinsius C.H.Heinz 衡月昆 C.Herold 侯国一侯颖锐侯治龙胡海明 j.F.Hu 胡涛胡誉黄光顺黄凯旋黄麟钦黄性涛黄燕萍黄震 T.Hussain N Hüsken W.Imoehl M.Irshad j.jackson S.jaeger S.janchiv E.jang j.H.jeong 纪全姬清平季晓斌季筱璐吉钰瑶贾泽坤姜赛赛江晓山 Y.jiang 焦健斌焦铮金山金毅荆茂强 T.johansson N.Kalantar-Nayestanaki 康晓珅 R.Kappert M.Kavatsyuk 柯百谦 I.K.Keshk A.Khoukaz R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc W.Kühn j.j.Lane j.S.Lange p.Larin A.Lavania L.Lavezzi 雷祚弘 H.Leithoff M.Lellmann T.Lenz 李翠李聪李春花李澄李德民李飞李刚李慧李贺李海波李惠静 H.N.Li j.Q.Li 李静舒李井文李科 L.j Li 李龙科李蕾李明浩李培荣李素娴栗帅迎李腾李卫东李卫国李旭红李晓玲李晓宇李彦谷李振轩李紫源梁畅梁昊梁浩梁勇飞梁羽铁廖广睿廖龙洲 j.Libby A.Limphirat 林创新林德旭 T.Lin 刘北江刘成刘春秀 D.Liu 刘福虎刘芳刘峰 G.M.Liu H.Liu 刘宏邦刘怀民刘欢欢刘汇慧刘建北刘佳俊刘晶译刘凯刘魁勇刘珂刘亮刘露刘美宏刘佩莲刘倩刘树彬刘桐刘维克刘卫民刘翔刘英刘玉斌刘振安刘智青娄辛丑卢飞翔吕海江吕军光陆小玲卢宇卢云鹏 Z.H.Lu 罗成林罗民兴罗涛罗小兰吕晓睿吕翌丰马凤才马海龙马连良马明明马秋梅马润秋马瑞廷马骁妍马尧 F.E.Maas M.Maggiora S.Maldaner S.Malde Q.A.Malik A.Mangoni 冒亚军毛泽普 S.Marcello 孟召霞 j.G.Messchendorp G.Mezzadri H.Miao 闵天觉 R.E.Mitchell 莫晓虎 N.Yu.Muchnoi Y.Nefedov F.Nerling I.B.Nikolaev 宁哲 S.Nisar 牛艳 S.L.Olsen 欧阳群 S.pacetti 潘祥潘越 A.pathak p.patteri M.pelizaeus 彭海平 K.peters 平加伦平荣刚 S.plura S.pogodin V.prasad 齐法制齐航漆红荣祁鸣齐天钰钱森钱文斌钱圳乔从丰秦佳佳秦丽清覃潇平秦小帅秦中华邱进发屈三强 K.H.Rashid C Institute of High Energy physics G.I.Budker Institute of Nuclear physics SB RAS (BINp) the Novosibirsk State University Uppsala University Bochum Ruhr-University johannes Gutenberg University of Mainz University of Turin INFN Liaoning Normal University State Key Laboratory of particle Detection and Electronics University of Science and Technology of China Southeast University joint Institute for Nuclear Research INFN Laboratori Nazionali di Frascati INFN Sezione di Ferrara peking University State Key Laboratory of Nuclear physics and Technology peking University National Centre for Nuclear Research Institute of physics and Technology University of Muenster Carnegie Mellon University Wuhan University University of Chinese Academy of Sciences Istinye University Nankai University the Moscow Institute of physics and Technology Soochow University Nanjing University Tsinghua University Institute of Modern physics Hunan University School of physics and Electronics Hunan University Shandong University Yunnan University Helmholtz Institute Mainz Liaoning University jilin University Zhengzhou University Sun Yat-Sen University University of Oxford University of Ferrara University of Manchester GSI Helmholtzcentre for Heavy Ion Research GmbH Guangxi University Nanjing Normal University Shandong Normal University Fudan University Key Laboratory of Nuclear physics and Ion-beam Application (MOE) and Institute of Modern physics Fudan University Henan Normal University University of Hawaii Suranaree University of Technology University Avenue 111 South China Normal University i University of the punjab Indiana University Huangshan College University of jinan University of Groningen justus-Liebig-Universitaet Giessen II.physikalisches Institut Indian Institute of Technology Madras Qufu Normal University Shanxi University Guangdong provincial Key Laboratory of Nuclear Science Institute of Quantum Matter South China Normal University Beijing Institute of petrochemical Technology Lanzhou University Frontiers Science Center for Rare Is

Using electron-positron annihilation data samples corresponding to an integrated luminosity of 4.5 fb-1,collected by the BESⅢ detector in the energy region between 4599.53 MeV and 4698.82 MeV,we report the first observations of the Cabibbo-suppressed decays Λc+→nπ+π0,Λc+→nπ+π-π+,and the Cabibbo-favored decayΛc+→nK-π+π+with statistical significances of 7.9σ,7.8σ,and >10σ,*** branching fractions of these decays are measured to be B（Λc+→nπ+π0）=（0.64±0.09±0.02）%,B（Λc+→nπ+π-π+）=（0.45±0.07±0.03）%,and B（Λc+→nK-π+π+）=（1.90±0.08±0.09）%,where the first uncertainties are statistical and the second are *** find that the branching fraction of the decay Λc+→nπ+π0is about one order of magnitude higher than that of Λc+→nπ+.

关键词： ∧c+ baryon Branching fraction BESⅢ detector