marginal zone lymphoma of mucosa-associated lymphoid tissue( malt lymphoma a re-evaluation[].Gut,2014,63(9):1526-1527 [2] Chaturvedi R, Asim M, Piazuelo M B, et al. Activation of EGFR and ERBB2 by Helicobacter pylori results in survival of gastric epithelial cells with DNa damage [J] Gastroenterology, 2014, 146(7): 1739-1751 3 Derks S, Bass A J Mutational signatures in Helicobacter pylori-induced gastric cancer: lessons from new sequencing technologies[]. gastroenterology 2014,147(2):267-269 检索策略叙述: 在bed中运用me词搭配自由词的方法能能够查全同义词与子概念,并 能够保证查到比较新的文献与 medline朱收录的文献,这些方面课上已多次强 调,在此不作赘述 iMOLING 针对所选择的课题,我从三个大方面去检索 1.幽门螺杆菌的影响mesh] 先对幽门螺杆茵的№H词进行检索。通过粗看文献的文摘,我发 现有些学者在写文章的时候把幽门螺杄菌 Helicobacter pylori的概念放大 至螺杆菌 Helicobacter进行叙述,其实通篇讲的就是幽门螺杄茵,而且主 題词的标引人员有时也喜欢标螺杄菌下的副主题词而非幽门螺杄菌的 副主题词。为了不丢失这部分文件,我在幽门螺杆菌的上位词螺杆菌的 主题词下进行副主题词的选择:病因,微生物学,病理和生理。并且对 螺杆菌下的其他4个下位词进行补差,发现限定条件内不会检出干扰的 文献(其他4个下位词都是小概念),所以可以认为提高了查全度的同 时保住了查准度。 尔后再对胃"的概念进行限制。从解剖的角度把胃分为”贲门”,“幽 门”与胃底,保证查全度。其中由于代表胃”的名词比较多,如 gastric, Gastrointestinal等,我进行截词符的运算" gastro*”," gastro·和" gastre*” 这三个前缀能够在保证查准的同时囊括其他与胃相关的词 最后对“肿瘤”的概念限制,从组织学与病理学的角度把胃易发的肿 瘤分为腺癌,鳞癌,淋巴癌,再结合常见的肿瘤的名词进行限定。限定marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT) lymphoma: a re-evaluation[J]. Gut, 2014,63(9):1526-1527. [2] Chaturvedi R, Asim M, Piazuelo M B, et al. Activation of EGFR and ERBB2 by Helicobacter pylori results in survival of gastric epithelial cells with DNA damage[J]. Gastroenterology, 2014,146(7):1739-1751. [3] Derks 5, Bass A J. Mutational signatures in Helicobacter pylori-induced gastric cancer: lessons from new sequencing technologies[J]. Gastroenterology, 2014,147(2):267-269. ~. #t 1ftIfl3.~x. I!.:-',J/ f \' " .~€tftf ~ffl meshiaJ~iJjG mtbiaJ fl1 ;;;f*1i~1i~~ fiil X.ia] E] -tm~, * ~~1*jL jlJ ,~4HIi RIJ ;t'"'~~~J:.,jtRIJ ;;;f i~Ct. e.. ;ksi ""--"" iftJ, tf.tl:.~f1:f-I!.. - ~i MLv LIN c '. #~M~~fl1*., ~~~+k;;;f~~#ti? 1. fl *~ffiII fl1 JJuf.J [mesh] J~:1f q:~ ~~ j:.:tfl1 ff.H~.re.~ fl *.;#iII Helicobacter pylorifl1{lit~~tk .f.*~#iII Helicobacteritt-fT>l5tI!., $ ~iffi.;i;j#-a1 :M::Jt~ fl ~;lfiII 0 r7T11Li. Jl!ia] fl1 ~;f 51 A.. 91 :1f ut -t!:..-t- ~k~;f~;IfiII T a1t%1].i.Jl!ia] r7T1 4f 11 ~; # iII fl1 t%IJ .i.Jl!iaJ 0 7J 1 ~-!- l~~~x.1t, ~~~ fl ~;ffiII 61 J:1ftia] ~;lfiII fl1 .i.Jl!~Tittff~.i.Jl!~fl1~~: ~~, .~~ , ~m~~mo *A~ ~;# iII T fl1 $1~A+ T {iia] itt1T;f. , ;tJJ{!. Hut~1t 0] i'-~ l±: -t.fJL a1 x.rfJt ($~4+T1ftiaJ~Jt+m~) , PJfItA iifItAiA.7J~~ 1 ~±Jtfl1fiil ut1¥d.t 1 ~ift£o ;tIf; *~" WII fl1 {lit itt-fT f~ {jill. ~wr- ~l] fl1 mJt.re. W~:h "it 1'1", II ~ fl"1:;,11~, 1*-iiE.~±£o cftb-t1\~"Wf1fl1%.iaJ~t.4x.~, ~gastric, Gastrointestinal~, ~ittff~ iaJ #fl1~Jf:."gastroe*" f"gastroi*~"gastri*f1 ~~+~.~~tf.*iiE.~*fl1fiilutt~$~1:;,11~*fl1~. iilf; "JJtF "fl1 flit F~ t;tJ, ).J..tll ~Y- q: 1:;, MJJi. q: fl1 ffJ JiA~ 11 !h;t fl1 flf ~~:h ••, •• ,~~.,*~~~~fl1~~fl1%.~ittff~~. ~~ 6