We also studied on the clarification effect of chitosan treatment with different deacetylation degree and molecular weight,and storage stability of clarified kiwifruit juice.
The method of synthesis of P-DADMAC,the factors such as dosage of initiator,reaction temperature,reaction time and nitrogen feeding,the relationship between relative molecular weight and charge density,the effect of pH value on the charge density were studied.
The results showed that when the amount of initiator was 0.75%,temperature was 50℃,and time of reaction was 5 h,relative molecular weight of P-DADMAC was the highest. 10 min of nitrogen feeding was enough.
Compared with PCF3, PCF4held lower ratio of Xyl: Ara, more branched structure of bone chain, more content of glucuronic acid and lower molecular weight.
The results showed that 3, 6-AG content of the agar molecular was decreased and had a positive correlation with average export power of the microwave, the gel strength, melting point, solidifying point and viscosity of the agar were all decreased after the microwave irradiation.
The Ap from indica rice and japonica rice that with lower molecular weight and branched degree, longer external chain displayed the shape of more rigid star in DMSO solution.
The CS-Chemoffice software was used to study the mechanism of forming inclusion between cyclodextrin and the guest molecular. The forming of inclusion was affected by space structure of cyclodextrin and the guest molecular, relevant acting force and reactive conditions.
The inclusion mechanism of guest molecules into cyclodextrins was discussed based on the study of inclusion between P-cyclodextrin and dyes. The conclusion was that the form of inclusion complex was dependent on both molecular structures of cyclodextrins and guests and the strength between them.
Herein we describe the 3D QSAR study of 4-anilinoquinoline-3-carbonitrile by Genetic Function Approximation (GFA) and Comparative Molecular Field Analysis (CoMFA).
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QSAR AND MOLECULAR MODELING STUDIES IN IMIDAZOPYRIDINETHIAZOLIDINE-2,4-DIONES: PPARγ AGONISTS
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Molecular Modeling of P-Glycoprotein and Related Drugs
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This paper summarizes the results from molecular modeling of various multidrug resistance (MDR) modulators and the MDR protein P-glycoprotein (P-gp).
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The pKi values for acetylcholinesterase and butyrylcholinesterase inhibitions by these drugs are linearly correlated with the molecular weights, with slopes of 0.005 and 0.0021, respectively.
The recent situation for the researches on chemical carcinogens and on the mechanism of chemical carcinogenesis is reviewed in this paper. Recently, the author of this paper has suggested a quantitative molecular orbital model -- "di-regions theory" for the chemical structure-carcinogenic activity relationship. A brief discussion about this theory and its further progress is given in this review.
The surface morphology of polyamide fibers, the morphological structure of the crimp region and the fracture morphology of the polyacrylonitrile fibers have been observed by using the transmission electron microscope and the scanning electron microscope. The characteristics of morphological structure of each specimen have been discussed. It is mentioned that if a process of steaming is added between the processes of spinning and stretching, the surface of the polyamide fibers would be rougher, and hence t...
Spinning speed is the most important one of the various technical parametersthat determines the structure of fibre during high speed spinning of poly(ethyleneterephthalate)fibre.The α loss factor of the pre-oriented yarns in dynamicmechnical spectra of temperature changes regularly with increasing of spinningspeeds.With the increase of spinning speeds,the α loss peak changes fromhigher values and narrower shapes to lower values and broader shapes,while thereal modulus increases only slightly.At a speed of 3...