赛默飞世尔Thermo Fisher POT HYDROXI

Use of a Novel 5′‐Regioselective Phosphitylating Reagent for One‐Pot Synthesis of Nucleoside 5′‐Triphosphates from Unprotected Nucleosides

Figure 1.30.1 General scheme for one‐pot synthesis of natural and sulfur‐ or selenium‐modified 5′‐triphosphates from unprotected nucleosides. Abbreviations: DMF, N , N ‐dimethylformamide; TBA, tributylamine

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

Harwood, E.A., Sigurdsson, S.T., Edfeldt, N.B.F., Reid, B.R., and Hopkins, P.B. 1999. Chemical synthesis and preliminary structural characterization of a nitrous acid interstrand cross‐linked duplex DNA. J. Am. Chem. Soc. 121:5081‐5082

尿15N排出试验监测抗幽门螺杆菌的疗效

，分别在治疗前1天及治疗结束后第1天检测尿 15 N排出率。②细菌培养检查：中药组及得乐组治疗前及疗程结束后第1天行胃镜检查，取活检做细菌培养检查，尿 15 N排出试验由新华医院核医学科协助完成。 2　结果 联合用药组中的3种疗法在治疗前后总体症状改善均较明显（t检验，P＜0.01），治疗前后症状改善有非常显著的差异（表1）。 表1　三种联合疗法临床症状变化积分 疗法 n 治疗前 治疗后 四