| 1. | Since fulvenes show no evidence of ring currents, the chemical shifts of the protons will be found in the normal definite region .
既然富烯不显示环电流存在的迹象，所以质子的化学位移仍然发生在正常的链烯区。 |
| 2. | Carbon chemical shift ranges
位移的范围 |
| 3. | Proton chemical shift ranges
位移的范围 |
| 4. | Chemical shift reagent
化学位移试剂 |
| 5. | Adrenal masses : is there linear correlation between unenhanced ct attenuation value and signal intensity loss on opposed - phase chemical shift mr imaging
值与磁共振化学位移成像反相位信号丢失程度相关性的研究 |
| 6. | This chemical shifts a plant ' s dna . application of this chemical will cause a mutation of the foliage or flowers . contains 3 doses
变异药水，可以改变植物的dna ，即让植物的花或叶随机变成其他种类。一瓶可以使用3次。 |
| 7. | So streptomyces sp . fr - 008 is a new strain synthesizing candicidin . nmr studies analysis of the 1h - 1h cosy spectrum allowed us to distinguish some important chemical shifts of the protons in fr - 008b which could be identified as eandicidin d . especially for amino - mycosamine residue , methyl protons and all the protons on the ring could be defined by correlating relation
利用与糖基合成有关的基因str - de作探针对这两个菌株的总dna进行了southern杂交，从两个菌株的总dna中均检测到一段相同大小的阳性片断，约6 . 4kd ( bamhi + bglii酶切) 。 |
| 8. | By choosing different solvents , concentrations and temperatures , and using nmr spectrum technique , to determine the hydroxyl of z / e isomers of perillartine , the concentration of which was 3 . 125 mg / ml , present different chemical shifts in c6d6 , solvent and carbon tetrachloride and in the 1h nmr , and accordingly , conduct qualitative and quantitative analysis of z / e isomers of perillartine
摘要本文利用核磁共振波谱仪，通过对紫苏葶溶液不同溶剂、不同浓度和不同测试温度的选择，使顺式结构和反式结构的紫苏葶羟基峰在核磁共振维氢谱中呈现出不同化学位移值，从而对其顺式结构和反式结构进行了定性、定量分析。 |
