Lin Tong Wang

Study on Hydrolysis Conditions of Flavourzyme in Soybean Polypeptide Alcalase Hydrolysate

Soybean protein Alcalase hydrolysate was further hydrolyzed by adopting Flavourzyme. From this further hydrolysis reaction, bitter of soybean polypeptide mixture was reduced distinctly. The optimal hydrolysis conditions of Flavourzyme was determined as that pH was 7.0 at temperature 50°C and E/S(ratio of enzyme and substrate) was 20LAPU/g. Bitter taste value was reduced to 2 after Flavourzyme hydrolysis reaction for 2 hours in optimal hydrolysis conditions. The change of molecular weight distribution range from Alcalase hydrolysate to Flavourzyme hydrolysate was not obvious. DH (Degree of hydrolysis) of soybean protein hydrolysate was increased to 24.2% which was improved 3.5% than Alcalase hydrolysate. Protein recovery proportion was increased to 73.2% which was improved 0.8% than Alcalase hydrolysate.

Study on Synthesis of Cationic Polymethyl Acrylate Emulsion

Emulsion copolymerization of methyl acrylate, styrene, acrylamide, acrylonitrile and homemade cationic monomer was studied. A series of clean cationic polymethyl acrylate emulsion were synthesized using no soap emulsion polymerization. Influence of polymerization conditions such as cationic monomer ratio, electrolyte addition amount, the dosage of initiator on synthetic latex performance and the strengthening effect to paper pulp was studied. It was showed by experimental results that sample No.3 which particle size and zeta potential was 0.142 μm and +29.2 mv respectively was the optimal sample latex. When the dosage of latex No.3 was 1.0% to absolute dry pulp, tensile index and ring crush index of paper was increased by 14.6% and 17.8% respectively.

Alignment of Graphite Nanosheet Induced by Electic Field

Unsaturated polyester resin/Graphite nanosheet composites were prepared using in situ polymerization under AC electric field, which was applied during composite curing to induce orientation of graphite nanosheets. Scanning electron microscopy (SEM) has been applied to demonstrate the orientation of graphite nanosheets. As a result, the percolation threshold was decreased to 0.25 wt% due to the orientation of the graphite nanosheets.

Study on a Novel Structure of Terbium Complex, C9H24O21Tb2

The Tb complex C9H24O21Tb2 has been synthesized from a hydrothermal reaction and the crystal structure has been determined by means of single-crystal X-ray diffraction. The Tb atom is coordinated by nine O atoms. The molecular structure stabilized by the O-H…O hydrogen-bonding interactions.

Study on a Novel Structure of C21H9Ba2SrN3O12

In the title compound, C21H9Ba2N3O12Sr, is prepared from a hydrothermal reaction and the crystal structure has been determined by means of single-crystal X-ray diffraction. The compound crystallize in Monoclinic, system with space group and cell parameters, C2/c, a=22.668 Å, b=10.937 Å, c=9.05 Å, α=γ=90°, β=90.582°, V=2243.6 Å3. The crystal packing is stabilized by O-H...O and O-H...N hydrogen bonding interaction.

Study on a Structure of 2,6-Pyridine Dicarboxylic Acid Gallium, (NH4)Ga(C7H3NO4)2

A novel Ga complex (NH4)Ga(C7H3NO4)2 has been synthesized from a solution reaction and the crystal structure has been determined by means of single-crystal X-ray diffraction. The Ga atom is six-coordinated by two N atoms and four O atoms from two 2,6-pyridine dicarboxylic acid anions. The crystal packing is stabilized by O-H...N hydrogen bonding interactions.

Determination of Synephrine and Naringenin in Aifunuangong Pills by High Performance Capillary Electrophoresis

This paper established high performance capillary electrophoresis method to determine synephrine and naringenin in aifunuangong pills. In 30mmol/L Na2B4O7 buffer solution (pH=10.00), effective separation of components to be tested was achieved, which provided a new approach of quality control of Chinese medicine aifunuangong pills.

Study on Soybean Polypeptide Refining Process

Soybean polypeptide mixture was decolorized by adopting activated carbon adsorption decolourization process. Anion/cation exchange process was used in the desalination processing of soybean polypeptide. It was showed that excellent decolorizing and desalting effect to soybean peptide solution was gained in the decolourization and desalination process adopted in this experiment. Optimal dosage of activated carbon was 1.2% solution amount (w/w). After decolorizing soybean polypeptide solution color was yellow. Proportion of anion resin and cation resin of ion exchange resin was 2:3(V/V). The volume of solution processed was 5 times as the volume of anion exchange resin. After desalination processing, ash content of soybean peptide solution reduced to 2.11% (dry basis), salinity decreased by 86%, on the other hand taste of soybean polypeptide was lite.

Capillary Zone Electrophoresis for the Determination of Gallic Acid in Jianmin Throat Tablet

In this work, the new capillary zone electrophoresis method is used for the determination of the content of gallic acid in jianmin throat tablet. Under the 20 mmol/L borate (pH=9.44), valid separation of gallic acid is obtained in jianmin throat tablet and the content of gallic acid is 0.7096 mg/g (RSD=5.4%) (n=5). The average recovery of gallic acid is 112.4% (RSD=8.4%)(n=4). The method is simple and rapid.

Determination of Gallic Acid Content in Terminalia by Capillary Zone Electrophoresis

In this paper, using capillary zone electrophoresis method determined gallic acid content in terminalia. Under the condition of buffer solution containing 20 mmol/L Na2B4O7, effective separation of components to be tested was realized. Measured content of gallic acid in terminalia was 25.36 mg/g (RSD=6.8%) (n=6), the average recovery was 87.6%. This method is simple and fast.