PREPARATION,IDENTIFICATION AND INTERFACIAL ACTIVITIES OF PETROLEUM CARBOXYLATE AS SURFACTANT FOR CHEMICAL FLOODING

Petroleum carboxylate that may be suitable for tertiary oil recovery have been producedinexpensively from the fractions of Daqing crude oil by a two step process.The feed stock was firstoxidized in the vapor phase,followed by reaction of the oxidized products with sodiumhydroxide.Dilute solutions of sodium carboxylates were produced and showultralow(10~(-2)mN/m)interfacial tensions(IFTs)against a variety of hydrocarbons with a widerange of ACN(Alkane Carbon Number).Infrared spectroscopy was used to identify the functionalgroups in the oxidized and the saponified products.     

LOCATION OF DOUBLE BOND POSITION OF INSECT SEX PHEROMONE BY GC/MS ANALYSIS WITH CHEMICAL IONIZATION

Ozonolysis products of four lepidopteral pheromone wereidentified by methane CI-MS.The spectra obtained were notably simpler thanthose of EI-MS,the peak of molecular ion was normally close to the basepeak,and the characteristic fragment ions were high in m/z,thereby theinterpretation was facilitated.     

SYNTHESIS OF CONDENSATION POLYMERS OF SALICYLIC ACID, FORMALDEHYDE AND ALKYL PRIMARY AMINES AND ITS APPLICATION AS A CATALYST FOR THE HYDROLYSIS OF p-NITROPHENYL ACETATE (PNPA) IN AQUEOUS SOLUTION

As a model of serine hydrolase, the condensation polymers of salicylic acid, formaldehyde and methyl amine, n-propyl amine, n-hexyl amine or n-lauryl amine were prepared by polycondensation catalyzed by sulfuric acid. It was confirmed by potentiometric titration and infrared spectrum that the polymers containing tertiary amino group possess the structure which resembles the internal salt of amino acid in weak basic and weak acidic solution:     

QUATERNARY AMMONIUM HALIDE－HYDROGEN HALIDE COMPLEX：A NEW CATALYST IN THE CLEAVAGE AND ESTERIFICATION OF BENZYL ALKYL ETHERS WITH CARBOXYLIC ACIDS UNDER MICROWAVE IRRADIATION

ＱＵＡＴＥＲＮＡＲＹＡＭＭＯＮＩＵＭＨＡＬＩＤＥ－ＨＹＤＲＯＧＥＮＨＡＬＩＤＥＣＯＭＰＬＥＸ：ＡＮＥＷＣＡＴＡＬＹＳＴＩＮＴＨＥＣＬＥＡＶＡＧＥＡＮＤＥＳＴＥＲＩＦＩＣＡＴＩＯＮＯＦＢＥＮＺＹＬＡＬＫＹＬＥＴＨＥＲＳＷＩＴＨＣＡＲＢＯＸＹＬＩＣＡＣＩ...     

THE APPLICATION OF N,N′DIBROMO-N,N′-1,2-ETHANEDIYL BIS(P-TOLUENESULFONAMIDE) AS A POWERFUL REAGENT FOR CONVERSION OF CARBOXYLIC ACIDS INTO ESTERS AND AMIDES WITH TRIPHENYLPHOSPHINE

In the presence of equivalent amounts of triphenylphenylphosphine and N,N′-dibromo-N,N′-1,2-ethanediylbis(p-toluenesulphonamide) ester and amide compounds can be generated in high yields from the corresponding carboxylic acid and alcohols or amines.     

A STUDY OF DYNAMIC DEVELOPMENT IN RADIOLESION AND CELL DEATH OF EUKARYOTES AFTER EXPOSURE TO IONIZING RADIATION——THE VISUALIZATION OF THE DYNAMIC REACTION BY MEANS OF CYTOCHEMICAL METHOD WITH LACTATE DEHYDROGENASE (LDH) AS NUCLEAR MARKER AND THE RADIAT

The present work deals with the radiation effect on adult rats suffering from acute, whole-body irradiation with cobalt-60 gamma rays of dosages 100R and 300R respectively. The morphological alteration of the lymphocytic nucleus and exhibition of eytochemical reaction of LDH in intra- or extra-nuclear region has been observed at the end of predetermined time intervals after irradiation. A close relationship between the percentage of damage of the lymphocytic nucleus and that of positivity of LDH reaction is seen from their variations with time parallel.From technical color microphotographs which exhibit cytochemical reactions, the existence of enzyme LDH in the nucleus so far obscure has been visually recognized. The events happening in enzymic reaction and the leakage of enzyme across the nuclear envelope reflect the dynamic nature. The ultrastructural alteration of nuclear anomalization confirms the dynamic development of inducing radiolesion. The experimental facts inspire us to attempt an explanatio     

A NOVEL IN－SITU SPECTROELECTROCHEMICAL TECHNIQUE WITH PROBE BEAM DEFLECTION：FOR STUDY OF THE ION EXCHANGE BETWEEN FILMS ON ELECTRODE SURFACE AND SOLUTIONS

ＡＮＯＶＥＬＩＮ－ＳＩＴＵＳＰＥＣＴＲＯＥＬＥＣＴＲＯＣＨＥＭＩＣＡＬＴＥＣＨＮＩＱＵＥＷＩＴＨＰＲＯＢＥＢＥＡＭＤＥＦＬＥＣＴＩＯＮ：ＦＯＲＳＴＵＤＹＯＦＴＨＥＩＯＮＥＸＣＨＡＮＧＥＢＥＴＷＥＥＮＦＩＬＭＳＯＮＥＬＥＣＴＲＯＤＥＳＵＲＦＡＣＥＡＮＤ...     

STUDIES ON THE REACTION OF SULFUR,SELENIUM AND TELLURIUM WITH SODIUM HYDROXIDE UNDER PHASE TRANSFER CATALYSIS(Ⅱ).A CONVENIENT METHOD FOR THE SYNTHESIS OF BI(ACYL)DISULFIDES

A simple and general method for the synthesis of bi(acyl)disulfides isreported.Sulfur is allowed to react with sodium hydroxide to give sodium disulfideat 65℃ under PTC,which can react with acyl halides to afford bi(acyl)disulfides ingood to excellent isolated yields.The effects of solvents and phase transfercatalysts are discussed.     

HEXAMETHYLDISILAZANE IN THE PRESENCE OF N,N′,N″,N‴-TETRAMETHYLTETRA-2,3-PYRIDINOPORPHYRAZINATO COPPER (II) IS A NEW,MILD AND HIGHLY EFFICIENT REAGENT FOR SILYLATION OF ALCOHOLS AND PHENOLS

Alcohols and phenols are protected with hexamethyldisilazane in the presence of N,N′,N′,N?-tetramethyletra-2,3-pyridinoporphyrazinato copper (II) in good-to-excellent yields at room temperature.