搜索结果: 1-15 共查到“知识库 理学 NMR”相关记录300条 . 查询时间(0.093 秒)
旨在应用代谢组学技术筛选产后卵巢静止奶牛乳清和血清的差异代谢物，明确其与奶牛卵巢静止的关系。本研究选取产后45~60 d的正常发情奶牛和卵巢静止奶牛各14头进行试验。应用一维氢谱核磁共振（1H-NMR）技术对两组奶牛的乳清和血清进行检测，结合多元统计分析和单变量分析，筛选出组间差异代谢物，并进行生物信息学分析，阐明差异代谢物参与的代谢通路与奶牛卵巢静止的关系。结果表明，在乳清和血清中分别筛选出13...
19F NMR of Trifluoroacetyl-Labeled Cysteine Mutants of Myoglobin:Structural Probes of Nitric Oxide Bound to the H93G Cavity Mutant
19F NMR Trifluoroacetyl Cysteine Mutants Myoglobin Nitric Oxide H93G Cavity Mutant
2016/5/23
Nitric oxide (NO) binds to the myoglobin (Mb) cavity mutant, H93G, forming either a 5- or 6-coordinate Fe--NO heme complex. The H93G mutation replaces the proximal histidine of Mb with glycine, allowi...
1H NMR Characterization of Myoglobins Where Exogenous Ligands Replace the Proximal Histidine
Sperm whale myoglobin Site-directed mutagenesis Resonance assignment Heme Orientation Imidazole Cyanometmyoglobin Binding Mutants H-1-nmr
2016/5/23
The role of the proximal ligand in determining the structure and ligand binding properties of sperm whale myoglobin has been investigated using the mutant H93G(L), where the proximal histidine has bee...
Characterization of the Overall and Internal Dynamics of Short Oligonucleotides by Depolarized Dynamic Light Scattering and NMR Relaxation Measurements
Overall and Internal Dynamics Short Oligonucleotides Depolarized Dynamic Light Scattering NMR Relaxation
2016/5/23
The dynamics of three synthetic oligonucleotides d(CG)4, d(CG)6, and d(CGCGTTGTTCGCG) of different length and shape were studied in solution by depolarized dynamic light scattering (DDLS) and time-res...
Multi-nuclear NMR Studies of DNA Hairpins:2.Sequence-Dependent Structural Variations
GERMANIUM DETERMINATION HYDRIDE GENERATION INDUCTIVELY COUPLED PLASMA EMISSION SPECTROMETRY MEDICINAL PLANT
2016/5/20
The solution conformation of three related DNA hairpins, each with five bases in the loop, is investigated by proton and phosphorus 2D NMR methods. The sequences of the three oligomers are d(CGCGTTGTT...
Multi-nuclear NMR Studies of DNA Hairpins:1. Structure and Dynamics of d(CGCGTTGTTCGCG)
GERMANIUM DETERMINATION HYDRIDE GENERATION INDUCTIVELY COUPLED PLASMA EMISSION SPECTROMETRY MEDICINAL PLANT
2016/5/20
The solution structure of the hairpin formed by d(CGCGTTGTTCGCG) has been examined in detail by a wide variety of NMR techniques. The hairpin was characterized by proton NMR to obtain interproton dist...
Structural changes between signaling states of bacterial chemoreceptors probed by solid -state NMR and hydrogen exchange
Structure of membrane protein lipid environment membrane signals bacteria chemical sensors membrane domains solid-state nuclear magnetic resonance (NMR)
2014/12/11
The limitations of structural studies of membrane proteins imposed by the lipid environment has made it difficult to determine the molecular mechanism of transmembrane signaling. For the bacterial che...
油页岩的13C-NMR特征及FLASHCHAIN热解模拟研究
核磁共振 热重红外 油页岩 热解 结构参数 FLASHCHAIN
2014/3/24
采用固体 13C-NMR核磁共振技术表征了甘肃窑街矿区油页岩的碳骨架结构，分析并计算了油母质团簇化学结构参数，包括团簇平均碳原子数、芳碳原子数、脂碳原子数及芳环数。在热重红外分析仪（TG-FTIR）上进行了油页岩的热解实验，得到了热解产物的生成规律。结合样品的团簇化学结构参数，采用基于油页岩结构的FLASHCHAIN模型模拟其热解产物的生成过程；模拟结果与TG-FITR实验数据符合较好，印证了模型...
Production of Citrate by Anaerobic Fungi in the Presence of Co-culture Methanogens as Revealed by 1H NMR Spectrometry
Piromyces sp. F1 Methanobrevibacter thaueri Nuclear Magnetic Resonance Citrate
2016/5/12
The metabolomic profile of the anaerobic fungus Piromyces sp. F1, isolated from the rumen of goats, and how this is affected by the presence of naturally associated methanogens, was analyzed by nuclea...
通过对正丁基锂(n-BuLi)/四氢呋喃(THF)引发α-甲基苯乙烯(mSt)负离子本体聚合,验证了n-BuLi缔合体可以引发聚合,形成超分子团聚体,然后在进一步聚合过程中超分子解离.证实了先前提出的负离子聚合的引发机理.通过7Li-NMR对聚合过程的在线检测,进一步证实了mSt在氘代苯为溶剂,THF为调节剂下的负离子聚合以及异戊二烯在非极性条件下的溶液聚合都存在引发剂多元缔合体向二元缔合体转变....
NMR Based Diffusion Pore Imaging by Double Wave Vector Measurements
NMR Diffusion Pore Double Wave Vector Measurements Medical Physics Chemical Physics
2012/5/29
In porous material research, one main interest of nuclear magnetic resonance (NMR) diffusion experiments is the determination of the exact shape of pores. It has been a longstanding ques-tion if this ...
^{75}As NMR study of the growth of paramagnetic-metal domains due to electron doping near the superconducting phase in LaFeAsO_{1-x}F_{x}
paramagnetic-metal domains electron doping superconducting phase LaFeAsO_{1-x}F_{x}
2012/2/27
We studied the electric and magnetic behavior near the phase boundary between antiferromagnetic (AF) and superconducting (SC) phases for a prototype of high-T_c pnictides LaFeAsO_{1-x}F_{x} by using n...
All-atom Molecular Dynamics Simulationsand NMR Spectroscopy Study on Interactions and Structures in N-Glycylglycine Aqueous Solution
All-atom simulation Temperature-dependent NMR N-glycylglycine aqueous solution Hydrogen bond
2012/4/5
All-atom molecular dynamics (MD) simulation and the NMR spectra are used to investi-gate the interactions in N-glycylglycine aqueous solution. Different types of atoms exhibit different capability in ...
Weak intermolecular interactions in gas-phase NMR
Weak intermolecular interactions gas-phase NMR molecular hydrogen isotopomers
2011/8/11
Abstract: Gas-phase NMR spectra demonstrating the effect of weak intermolecular forces on the NMR shielding constants of the interacting species are reported. We analyse the interaction of the molecul...
Anisotropic spin fluctuations and superconductivity in "115'' heavy fermion compounds: 59Co NMR study in PuCoGa5
StoAnisotropic spin fluctuations superconductivity NMR study in PuCoGa5
2010/11/24
We report results of 59Co nuclear magnetic resonance measurements on a single crystal of super-
conducting PuCoGa5 in its normal state. The nuclear spin-lattice relaxation rates and the Knight shifts...