New Fragmentation Pathways for Cephalosporins by Electrospray Ionization Quadrupole Time-of-flight M

来源 :高等学校化学研究(英文版) | 被引量 : 0次 | 上传用户:lyztracy
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
IntroductionCephalosporins are antibiotics of β-lactam family. They have a broad spectrum of antibiotic activity due to their ability to inhibit bacterial cell wall synthesis of different Gram-positive and Gram-negative bacteria. Cephalosporins are used orally or parenterally to treat a wide variety of infections throughout the body and are often prescribed to fight penicillin resistant microorganisms. They also find a common use in prophylaxis for surgical procedures where infections in the operating area could pose a serious risk[1,2].
其他文献
Orthohexagonal slices assembled by ZnSe quantum dots were synthesized through emulsion liquid membrane system. These orthohexagonal slices were 1.5-3.5 μm in s
The synchronization and asynchronization of two coupled excitable systems are investigated. The two systems with different initial configurations, which are sep
In this paper, two problems about composition operator on Hardy space are considered. Firstly, a new estimation of the norm of a class of composition operators
This paper undertakes a systematic treatment of the low regularity local wellposedness and ill-posedness theory in Hs andHs for semilinear wave equations with p
The flow performances of water, white oil and Hydrolyzing Polyacrylamide (HPAM) solution in fused quartz channels and the effect of wettability on the microscal
The title compound, {Mn(H2O)4(VO)2(PO4)2}n 1, was synthesized by the hydrothermal reaction of Mn(Oac)2, Na2VO3 and H3PO4 in aqueous solution and its crystal str
A defect-free SAPO-44 zeolite membrane firmly anchored the porous α-Al2O3 plate substrate was successfully synthesized. The separating results showed that the
Two new steroids, nanjiols D and E, were isolated from the soft coral Nephthea bayeri.Their structures were characterized by spectroscopic methods and compariso
A generalization of the usual Green function to a kind of nonlinear elliptic equation of divergence form is discussed. The regularity and comparison principle o
Ab initio Hartree-Fock theory at the aug-cc-pvtz level is used to investigate the equilibrium structures and isomerization of HSOF system. All of the transition