Latrepirdine，3613-73-8，≥98%，阿拉

西藏高原自然人群幽门螺杆菌感染流行病学调查

值≤1.6mmol/L定Hp阳性；≥1.82mmol/L定Hp阴性；介于二者之间者定Hp为（±）。②涂片中找到一条以上Hp者为阳性。③Hp试纸法1min后试纸由黄色变为红色者为Hp阳性，不变色者为阴性。④上述三项检查中有一项明确为阳性者则判定为胃Hp感染阳性。 2 结果 受检人员376人中，藏族265人，汉族111人。其中Hp阳检人员共248人，占总人数的66%。藏族Hp阳检人员177人，占藏族总人数的66.8%。汉族Hp阳检人员71人，占汉族总人数的64%。受检人员中男性217

Assisted large fragment insertion by Red/ET-recombination (ALFIRE)―an alternative and enhanced method for large fragment recombineering

the entire mouse or human luteinizing hormone/chorionic gonadotropin receptor genes (Lhcgr ) were purchased from Research Genetics (clones RP23-18D7 and RP11-73L19, respectively). Individual BAC clones were propagated in E. coli in Luria�Bertani (LB) media

Two‐Step, One‐Pot Synthesis of Inosine, Guanosine, and 2′‐Deoxyguanosine O6‐Ethers via Intermediate O6‐(Benzotriazol‐1‐yl) Derivatives

) 1H ‐Benzotriazol‐1‐yloxy‐tris(dimethylamino)phosphonium hexafluorophosphate (BOP), ≥98% pure (Chem‐Impex, http://www.chemimpex.com) Tetrahydrofuran (THF): distilled