The experiments of the freeze-fractured transmission electron microscopy and 1H NMR show that the presence of Triton X-100 makes gelatin chains coil first and then open, with little influence on the microenvironment of amino acid.
冷冻蚀刻透射电镜和核磁共振实验表明，随着Triton X-100浓度的增加，Triton X-100能使明胶分子链先卷曲后仲长，但对氨基酸周围的微环境影响较小。
The structure was elucidated by spectral analysis and confirmed by X-ray single crystal refraction analysis. This compound showed biological activity as plant growth regulator.
含量相当丰富，通过NMR各种技术和X-射线衍射分析，最后确定其结构为吲哚类生物碱，经过生物测试，对白菜等具有植物生长激素活性。
The acidity and Al in the lattice framework of HZSM 11 were studied by NH 3 TPD and 27 Al MAS NMR.
采用NH3 TPD和MASNMR研究了分子筛的表面酸性和骨架铝的变化。
1H and 13C NMR spectra were recorded on a Bruker ARX 300 NMR spectrometer using chloroform-d as solvent and tetramethylsilane as internal reference.
1H和13C NMR谱谱录的布鲁克ARX技术300 核磁共振光谱仪使用氯仿三维为溶剂和tetramethylsilane作为内部参考之用。
A series of ethylene/propylene copolymers with different propylene contents were prepared and the microstructure was characterized by ~(13)C-NMR, GPC and DSC.
2在聚合物链中，丙烯单元单个存在，即使在丙烯含量高达14.93mol％的聚合物中，也是如此。
The chain structure was characterized by illustrating the average block length in terms of the portion of different triads.
采用13C-NMR技术测定共聚物中三种不同连接方式(AKA，DKD，AKD)的平均链段长度，共聚物为短嵌段结构。
Five isomers containing oxygen bridge have been prepared from different β-dicarbonyl compounds and urea/thiourea and also been characterized by 〓H NMR spectroscope, 〓C NMR spectroscope, IR spectroscope, EI/MS and elemental analyses. From this, we can see that it is a general method for preparing such tri-cyclic compounds.
采用不同的β-二羰基化合物、脲和硫脲合成了五个含氧桥的异构体，利用〓HNMR、〓CNMR、IR、EI/MS和元素分析对上述化合物进行了结构表征，证明该异构体的合成具有一定的普遍性。
We furthermore investigate to use a cantilever with a frequency equal to the Larmor frequency of a single nuclear spin to achieve the purely mechanical NMR detection of the single nuclear spin.
我们更进一步研究另一个以MRFM量测单一核子自旋态的方案，在此方案中，探针的震荡频率与自旋的拉摩频率是相同的，使得我们可以以纯机械方式实现核磁共振的原理。
The ethanol extract was dissolved with HCl, the acidic extract was basified to pH9-10 with NH_3-water and extracted with CHCl_3 to give total alkaloids. five alkaloids were isolated with column chromatography and preparative thin-layer chromatography, and three of them were identified as dehydrocorydaline、corynoline and dihydrosanguinarine on the basis of spectral analysis MS, ~1H-NMR, ~(13C-NMR and physicochemical properties. All of them were found for the first time from this plant.
为研究灰绿黄堇的化学成分，本文将灰绿黄堇乙醇提取物采取酸提取、碱游离后萃取的方法得到总生物碱，然后利用柱色谱、制备薄层色谱等方法分离、纯化了灰绿黄堇中5种生物碱，并利用IR、MS、~1H-NMR、~(13)C-NMR等方法鉴定了其中的3种，分别为去氢紫堇碱、紫堇灵、二氢血根碱，均为首次在此植物中发现。
The construction of target product was illustrated by MS, IR and NMR.
MS、IR和NMR图谱表征了产品2-十一烯醛乙二醇缩醛的结构。
Chemical shift and P-H coupling constant were determined for each phosphorus compound, through the decoupling and non-decoupling 31P-NMR spectrograms. In the part of discussion, with the 31P-NMR spectrograms of organic phosphorus pesticides in different structures, difference among the electronegativitis of the four elements directly connecting to 31Pwere given to show the relationship between the chemical shifts and structures for phosphorus compounds, according to the electron cloud spherical symmetry theory. Difference of the chemical shifts among the similar-structured compounds was also analyzed from the angle of conjugation and inducement in electron cloud density theory.
通过31P-NMR谱的去偶和不去偶的谱图，测出各化合物磷的化学位移和P-H偶合常数，并结合不同结构的有机磷农药的31P-NMR谱，计算了与磷原子直接相连的四个元素的电负性差值从电子云球对称效应的角度对各化合物的化学位移与△X的关系进行了详细的分析：还从电子云密度效应的角度利用共轭效应和诱导效应的原理讨论了结构相近的化合物的化学位移不同的原因。
A novel catalyst for the copolymerization of CO2 and cyclohexene oxide was prepared by using zinc acetate anhydrous, aluminum isopropoxide and precursor N, N`-bis(2, 6-diisopropylphenyl)-2, 4-ethyldiimine Comparing with other similar catalytic systems prepared with diethyl zinc, it is of low cost and easy to handle The resulted copolymers were characterized by IR and NMR.
用α二亚胺型BDIE配体 N，N'-(2，6-二异丙基苯基乙二亚胺与氧联锌铝醇盐以配位的方式制备了高位阻催化体系BDIE·，并催化二氧化碳与氧化环己烯共聚。
We will perform NMR experiments by measuring temperature-dependent line shape, Knight shift, as well as spin-lattice relaxation rate on each individual sample.
我们将在核磁共振实验中量测与温度有关的谱线、奈特位移及自旋晶格松弛率。
By NMR measurements, we got the central transition line shape of this three superconductors, and the Knight shift and spin-lattice relaxation time (T1) for each of the three crystallographic sites.
藉由核磁共振技术来量测这三个超导体的中央跃迁谱线和各个超导体三个不同结构位置的Sc的奈特位移和自旋晶格松弛时间。
A series of compounds of 5-fluorouacil derivatives conjugating with aminoglucose were firstly synthesized following the combination principle and characterized by IR, NMR and elemental analysis.
根据拼合原理设计并首次合成了一系列新的5-氟尿嘧啶衍生物-糖化合物，应用IR，〓 NMR及元素分析完成了结构确证。
SBTA containing two benzotriazoly moiety and one thiodiazoly moiety was synthesized and certified by IR and 〓H-NMR. It showed better protection effect for copper in 3%NaCl solution than in 0.5M H〓SO〓 solution.
SBTA在0.5M H〓SO〓溶液中对铜电极的阳极过程有抑制作用，是阳极型缓蚀剂；在3％NaCl溶液中SBTA对铜电极的阴、阳极电化学过程均有明显的抑制作用，是混合型缓蚀剂。
This could be a fascinating method for the practical syntheses of chiral synthons as valuable building blocks and important medicinal intermediates.3.Series of novel optical pureγ-aryl-1H-1, 2, 4-triazole derivatives were designed and synthesized by using the chiral auxiliary(Oppolzer's sultam), and all these target compounds were structurally characterized by ~1H NMR, ~(13)C NMR, MS and elemental analysis, at the same time, some representative compounds have been elucidated by X-ray diffraction analysis.
应用手性辅剂樟脑磺内酰胺的手性诱导作用，设计合成了一系列光学纯的γ-芳基-1H-1，2，4-三唑类衍生物，所有目标化合物都采用了~1H NMR、~(13)C NMR、MS和元素分析进行了结构表征，同时也获得了部分代表性化合物的晶体结构，进一步确证了化合物的结构。
And at the same time the distribution of NMR signal is asymmetry.
同时发现了核磁共振信号的不对称分布。
The results demonstrated that both resin and solvent are critical factors influencing 〓H line widths. Tenta Gel S NH〓 resins, which have the longest tethers and the most mobile moieties, provided the narrowest line-widths.
结果表明：树脂和溶剂是影响〓H NMR关键因素，Tenta Gel S NH〓树脂有较长的聚乙二醇边链，具有较好的柔韧性和流动性，可以得到最好的谱图。
Vancomycin was directly coupled onto Tenta Gel S NH〓 or PEGA resin through its C-terminus. HR/MAS NMR studies indicated that conformation of PEGA-bound vancomycin was the same as free vancomycin, and Ac〓-L-Lys-D-Ala-D-Ala interacts with PEGA-bound vancomycin the same way that it interacts with free vancomycin.
本文将万古霉素C端分别连接到Tenta Gel S NH〓和PEGA树脂上，利用高分辨魔角核磁共振技术研究了万古霉素在固相载体上的构象变化以及与Ac〓-L-Lys-D-Ala-D-Ala的相互作用。