13c

Determination of ~ 13c in co_2 breath samples by nuclear analysis

~（13）CO2呼气试验的核分析方法

The structure of the polymer was studied with FTIR and 13C NMR .

利用傅里叶变换红外光谱仪（FTIR）和~（13）C核磁共振仪对聚合物的结构进行了研究。

The prepared adsorbent was characterized by solid state 13C NMR and elemental analysis .

通过13C固体核磁、元素分析对其进行了表征。

~ 13C NMR Studies of Crosslinking Reaction between Gelatin and Formaldehyde

碳-13核磁共振波谱法对甲醛和胶原交联反应的研究

The result evidently indicates a possible halo - like neutron skin of 13C .

这说明13C可能存在着一个类晕的中子皮。

All products characterized by 1H NMR , 13C NMR , MS spectra .

所有的产物通过了1HNMR，13cNMR，质谱的表征。

After 1H NMR , 13C NMR and elemental analysis confirmed the detection of its structure .

经过核磁共振氢谱、碳谱和元素分析等检测方法证实了它的结构。

Laterally the values of 13C and Z generally present an increasing trend southwards .

横向上，δ13C及Z值总体具有由北向南升高的趋势。

The 13C NMR and 31P NMR spectroscopy of them were also given .

并对各化合物的~（13）C和~（31）P核磁共振谱作了研究。

The standard deviation for the preparation of δ 13C samples and determination results is ≤ 0 . 14 ‰ .

δ13C制样及测定结果的标准偏差≤0.14‰；

Review on the 13C NMR chemical shifts of alkaloids from Fritillaria

贝母属植物生物碱的~（13）CNMR化学位移研究

All novel compounds were confirmed by 1H NMR , 13C NMR and elemental analysis .

所有化合物均经过1HNMR、13cNMR和元素分析确证。

The results make sure that the first excited state of 13C is the one-neutron halo state .

结果证实13C的第一激发态为单中子晕核态，首次从实验上证实在B稳定线上存在激发的晕核态。

The topological structure of the spacer arm was inspected by solid 13C NMR .

树状间隔臂的生成过程用~（13）C固体核磁共振技术进行检测。

A 13C NMR method for determining the shortest average distance between macromolecular chains and solvent molecules

高分子链与溶剂分子最短平均距离的~（13）cNMR测定法

The δ 13C values of suspended particulate matter has close relationship with basic environmental factors , and has significant correlation .

悬浮颗粒物的δ13C值与基本环境因素之间具有密切的关系，具有显著的相关性。

Chemical structure and oil / gas potential of hydrocarbon source rock macerals as viewed by ￣ 13c NMR techniques

用~13cNMR波谱技术研究烃源岩显微组分的化学结构与成烃潜力

The structures of products were identified by IR , 1H NMR and 13C NMR .

产物结构被IR，1HNMR和13cNMR鉴定。

Results The structure of the target molecule was identified by1H NMR , 13C NMR and element analysis .

结果最终产物由核磁共振谱和元素分析进行结构鉴定。

~ 13c NMR study of copolymers of β - cyclodextrin and epichlorohydrin

β-环糊精与环氧氯丙烷共聚物的~（13）C-NMR研究

They are characterized by 1 ~ H NMR , 13C NMR and IR .

分别经过1~HNMR、（13）~cNMR和IR表征。

All the products were confirmed by 1H NMR , 13C NMR and HRMS analysis .

所有产物的结构得到了核磁共振谱、质谱等的证实。

The structure of urea formaldehyde resins in various stages of production with new technology was analysed by means of 13C NMR .

本文通过~（13）cNMR研究了脲醛树脂合成新工艺中不同反应阶段时的脲醛树脂的化学结构。

Carbon membrane derived from lignin-phenol-formaldehyde resin is analysed by using CP / MAS 13C NMR spectrum technology .

采用固体核磁共振技术CP/MAS13cNMR分析了木质素酚醛树脂炭膜。

Comparing with surface soil , aerosols had much smaller particle size and lower δ 13C value and higher δ 18O value .

与表土相比，气溶胶的粒度小得多，具有较低的δ13C值和较高的δ18O值。

13C NMR analyse linking form of saccharide in glycosides

~（13）C核磁共振解析甙类化合物中糖的连接方式

~ 13c NMR study of polyacrylate triphenyl - phosphonium chloride

氯化聚丙烯酸酯三苯基磷~（13）cNMR研究

The main results are as follows : 1 . The δ 13C values of suspended particulate matter were significant seasonal variation .

主要结果如下：1、悬浮颗粒物的δ13C值具有显著的季节变化。

The 13C NMR spectra of seven azo dyes derived from pyridones were measured .

测定了七个吡啶酮系偶氮染料的~（13）cNMR波谱。

Elemental analysis , IR , 13C NMR and X-ray photoelectron spectroscopy were used to characterize the mimic .

利用元素分析、红外光谱、13cNMR和X-ray光电子能谱等分析手段对合成的GPX人工酶进行了结构表征。