In order to prepare special alcohol-soluble polyvinyl butyral (PVB), the reaction condition was explored in this paper after analyzing the molecular structure of PVB. Under a simple and economical condition, PVB with 14.2% of butyraldehyde group and good alcohol-solubility were prepared, the PVB film forms quickly after the volatilization of ethyl alcohol, and it has good diaphaneity, high tensile strength, and excellent mechanical properties. The highest tensile strength of the PVB film reaches 50.9MPa, which can meet some requirements of many applications.
Objective: This paper aims to discuss the effect of peripheral blood T-lymphocyte subpopulation test on gastric cancer monitoring and prognostic evaluation. Methods: Ninety-three patients with gastric cancer were recruited for this prospective study and randomly divided into two groups. The conventional treatment group was treated with DDP+5-trihydroxypyrimidine, and the observation group was treated with combined raltitrexed and oxaliplatin. Venous blood samples were collected on an empty stomach before and after the treatment. The proportions of Th1 and Th2 were determined by flow cytometry analysis. Serum levels of IL-2 and IL-10 were tested by an enzyme-linked immunosorbent assay kit. Another 33 volunteer patients were recruited in the same period for the control group. Results: Before the treatment, the conventional treatment group and the observation group possessed higher proportions of Th1 and Th2 and serum levels of IL-2 and IL-10 but significantly lower Th1/Th2 and IL-2/IL-10 than the control group (P<0.05). However, the difference between the conventional treatment group and the observation group was not statistically significant (P>0.05). After the treatment, the observation group exhibited lower proportions of Th1 and Th2 and serum levels of IL-2 and IL-10 but higher Th1/Th2 and IL-2/IL-10 than the conventional treatment group (P<0.05). Conclusions: Peripheral blood T-lymphocyte subpopulation test can be used as an index for gastric cancer monitoring and prognostic evaluation and merits clinical promotion.
In this paper, based on the ultrasonic dispersion principle, the grafting reaction of maleic anhydride (MAH) onto solid PP in water was studied with acetone as the phase physiognomy solvent, ammonium persulfate [(NH4)2S2O8] as the initiator. The influence of specific surface area on the graft ratio was also studied. The results showed that the grafting reaction had obvious relationship with the specific surface area of original PP particles.
Polyether-modified polysiloxane was synthesized by hydrosilylation, using allylic alcohol polyether and polysiloxane as materials, toluene as solvent and chloroplatinic as catalyst. The effect of technology conditions on conversion rate of hydrogenous silicone oil was discussed and chemical structure of product was characterized. The results show that the optimum technology is: the reaction temperature is 95°C, time is 5h, the molar ratio of polysiloxane to polyether is 1:1.2, the dosage of catalyst is 30ug/g and the mass fraction of the toluene is 25% of the system.
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