148-25-4Relevant academic research and scientific papers
Method for preparing energy-efficient H-acid
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, (2016/10/08)
The invention discloses a method for preparing energy-efficient H-acid. The method comprises the steps of conducting sulfonation on liquid naphthalene to obtain a sulfonated substance, conducting nitration on the sulfonated substance to obtain a nitrated substance, conducting denitration on the nitrated substance to obtain a denitrated substance, conducting extraction on the denitrated substance to obtain dilute sulphuric acid and an extraction mixture, conducting reextraction on the extraction mixture to obtain nitro T-acid solution, conducting reduction on the nitro T-acid solution to obtain amino T-acid solution, conducting concentration on the amino T-acid solution and caustic soda liquid to obtain concentrated amino T-acid solution and caustic soda, conducting alkali fusion and dilution on the concentrated amino T-acid solution and caustic soda to obtain a diluted alkali fusion substance, conducting separation and filtration on the diluted alkali fusion substance to obtain H-acid filter cakes, and conducting drying on the H-acid filter cakes to obtain H-acid. By the adoption of the method, continuous production of H-acid can be achieved, and economic cost is low.
Kinetic method for determination of trace amounts of protein based on its inhibitive effect on potassium periodate-(dibromo-p-sulfonic acid arsenazo) indicator reaction
Zhai, Qing-Zhou,Yu, Hui,Hu, Wei-Hua,Zhu, Peng-Hui
experimental part, p. 4072 - 4078 (2012/01/13)
A novel kinetic spectrophotometric method for the determination of protein is based on the inhibitive effect of bovine serum albumin (BSA) on the oxidation reaction of dibromo-p-sulfonic acid arsenazo (DBS-ASA) by potassium periodate in the medium of CH2ClCOOHCH3COONH4. The maximum absorption peak of BSA-(DBS-ASA)-KIO4 system is located at 530 nm. The absorbance difference (δA) is well linearly related with the concentration of bovine serum albumin over the rage of 2.5-90.0 μg/mL of solution and fitted the equation: δA = 0.01091C + 0.0646 (C: μg/mL), with a correlation coefficient γ = 0.9941. The detection limit of the method was 0.48 μg/mL. The method has been successfully used in the determination of the total content of protein in egg white and the relative standard deviation of 15 determinations were less than 5 %. The recovery of standard addition of the method was over the range of 100.1-101.2 %.
Sensitive kinetic-spectrophotometric determination of protein based on its inhibitive effect on the decolorization of dibromo-p-methylsulfonazo
Yu, Hui,Zhai, Qing-Zhou,Hu, Wei-Hua,Xiang, Song-Bai
experimental part, p. 3984 - 3988 (2012/01/13)
A novel kinetic spectrophotometric method for the determination of protein is developed on the basis of kinetic effect of bovine serum albumin (BSA) on the inhibitory effect on the oxidation reaction of dibromo-p-methylsulfonazo by potassium periodate. The absorbance differences (δA) between inhibitive and non-inhibitive systems are maximum at 558 nm. The absorbance difference is linearly related with the concentration of bovine serum albumin over the range of 5.0-55.0 μg/mL and fitted the equation: δA = 8.988 × 10 -3 C (C: μg/mL) + 0.0185, with a regression coefficient of 0.9960 at the wavelength. The detection limit of the method was 1.55 μg/mL. The method was used to determine protein in pure milk. The relative standard deviation was 1.58 and 1.49 % for 13 replicate determinations. The recovery of the standard addition was 101.1 and 99.33 %.
Polymer electrolyte and process for producing the same
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, (2008/06/13)
A polymer electrolyte having, in a main chain, a structural unit represented by the following formula (1):-[Ar1-(SO2-N-(X+)-SO2-Ar2)m-SO2-N-(X+)-SO2-Ar1-O]- wherein Ar1 and Ar2 independently represent a divalent aromatic groups, m represents an integer of 0 to 3, and X+ represents an ion selected from hydrogen ion, an alkali metal ion and ammonium ion, which is excellent in proton conductivity, thermal resistance and strength. The polymer electrolyte is soluble in solvents and has excellent film forming property and recycling efficiency.
Aromatic azo sulfonylnitrene compounds
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, (2008/06/13)
Compounds of the structure SPC1 Wherein R and R1 are the same or different and are selected from the group consisting of hydrogen, halogen, and alkyl from one to four carbon atoms, inclusive, and R2 is a substance which inhibits thrombogenic or clotting activity of a material and is that portion of a substituted aromatic which couples with a diazonium salt.
