In the aqueous micellar solution of sodium dodecyl sulfate (SDS), the solubilisaton position of ten short chain aromtic hydrocarbons and their derivatives were studied by high resolution proton nuclear magnetic resonance spec-troscopy (¹H-NMR). The content of solubilisate in this aqueous micellar solution were determined from their ternary phase diagrams. The detailed results of position and content of solubilisate were obtained and are discussed theoretically in this paper.

The ¹³C NMR spectra of 33 mono-, di- and tri-substituted pyridine derivatives were recorded and the spectral lines were assigned. 16 of the derivatives are novel compounds.On the basis of the variation of the ¹³C NMR spectral data the empirical parameters for the calculation of both pyridine ring and alkyl chemical shifts in α-, β and γ-mono substituted pyridines with the number of alkyl carbon atoms greater than 2 were obtained. The empirical additivity rules of mono-and multi-alkyl substituted pyridines are discussed.

ESR spectra of some oxovanadium acidic phosphates (phosphonates) complexes in chloroform measured at room temperature were further analyzed. ESR spectral parameters of these complexes in chloroform at liquid nitrogen temperature were determined.Their bond parameters were calculated and the bonding character between vanadium (Ⅳ) and ligands is discussed in this paper.

The ¹³C-NMR spectra of poly (trimethyl tin methacrylate), (PTMTM), poly (triethyl tin methacrylate), (PTETM),and poly (tri-n-butyl tin methacrylate), (PTBTM), polymerized with radical initator in the solution were measured. Resoluion of the C-2 peaks was made by computer. The quantitative results indicated that the sequence distribution of the polymers was syndiotactic-rich or slightly syndiotactic-rich. This syndiotacticity decreases with increase in volume of substitute, which could be influenced by the steric effect and the intra-or intermolecular coordination bond.

A ¹H resonance peak of the adsorbed hydrogen in palladium-carbon catalysts was observed at the high field side about 20 ppm away from the resonance peak of the dissolved hydrogen in the palladium sponge. Its position varies with the species of the carbon support, and is related to the activity of the palladium-carbon catalyst in hydrogenation reactions. While, the spin lattice relaxation time of the resonance peak does not show any dependency on the activity of the catalyst. It seems to be dependent on the amount of surface acid groups of the support. This resonance implies a special state of the adsorbed hydrogen and can be attributed to the spilled over hydrogen. The activity of the catalyst is discussed with respect to the hydrophobic property of the support by the NMR parameters of water adsorbed on the support.

The structures of P(AM/AA) copolymers were determined from ¹³C-NMR spectra. Based on the observation and comparison of chemical shifts between homopolymers PAM、PAA and copolymers P(AM/AA), the assignments of the spectral lines of P(AM/AA) were established. The split peaks of carbonyl carbons in P(AM/AA) were related to the contribution of triad copolymeric sequence distribution in the molecular chains.

The norfloxacin is an effective and safe anti-infective with broad-spectrum, and can be taken orally ·Its ¹H spin-lattice relaxation times (T₁) were determined in the presence and absnce of some transintion metal ions such as Cr³⁺, Mn²⁺ and Fe³⁺.The experimental results showed that T₁ values appeared to vary regularly by the addition of these paramagnetic metal ions with unpaired electrons in the high spin state. The T₁ values of ¹H at different sites reduced variously m-ong which the T₁ values of 2-H and 5-H reduced most obviously. The structures of the complexes, bonded states and bonding quantity are discussed with respect to the relaxation times thus measured.

In view of the fact that the free radicals formed after irradiation of alanine were cousiderably stable and their total number, in the dose range commonly used for food irradiation (10²~10⁴Gy), was proportional to the irradiation dose, the alanine/ESR system was selected as the transfer dosimeter for measuring high-level doses of γ-rays in China, related studies were made and normal conditions for ESR measurement was established.Especially, the linear relations between gain settings of the spectrometer were amended and the effect of rotation of the specimen tube on the signal amplitude was quantified.The lower limit for detecting the absorbed dose was found to be 5 Gy. In the range of 0.05~17kGy, for alanine specimens irradiated with ten different doses, the linear correlation coefficient between the main peak amplitude h of the ESR spectrum and the corresponding dose D was greater than 0.999.

The HPD nitroxide free radical was first synthesized and used to study the influence of ginsenoside on the photosensitization of HPD. In both aqueous and human serum albuman systems ginsenoside showed obvious inhibition of the photo xidatio n and promotion of the photoreduction of HPD within 15 min after its addition. This seems to be the evidence of inhition or scavenging of the singlet oxygen of HPD by ginsenoside. The mitigatien of the HPD photoxidation and the protectios of normal tissue by ginsenoside is of great significane.

Intensity modulated ³¹P NMR spectra were obtained by using the pulse sequence in a FT-80A spectrometer. Spin-echo techque for signal assignment could be applied to systems with direct couplings (³¹P-¹H) and long-range couplings (³¹P-O-C-¹H) fragments. Some applications to the dialkyldithiophosphoric acids, dialkyl phosphonates and other phosphorus containing compounds are discussed.

The principle,application and setting of main parameters on EDIT technique suitable for FT-80A. NMR spectrometers are introduced in this paper.
When a set of APT parameters is used, the empirical values for the key parameter, LT, are as follows:
1 When set LT to 6, 7 or 8ms, the normal APT ¹³C spectra can be obtained.
2 When set LT to 4ms, the signal of all methyl carboons will vanish
3 when set LT to 2.9 or 3ms,tte intensity of quaternary carbons,compared. with those of the corresponding normal APT ¹³C spectra, can be greatly enhanced.
This rule can be generally applied in the identification of ¹³C-H groups of all organic compounds (C≡C of alkyne derivatives have not been tested)