Based on the critical solution temperature (CST) of thermoregulated phosphite ligand OPGPP(n=19) in organic solvents of heptane/toluene (volume ratio 0.6), phosphite ligand OPGPP was synthesized and the complex of OPGPP and transition metal catalyst was applied to thermoregulated phase-separable catalysis for the first time, which further widen the basis and application range of thermoregulated phase-separable catalysis.

Poly(N isopropylacrylamide) (PNIPAM) and acenaphthylene (ACE) labeled PNIPAM (PNIPAM/ACE) have been synthesized by free radical method. The salt effect on the low critical solution temperature (LCST) of PNIPAM has been systematically investigated.

Therefore, the florescence intensity at 307 nm was increased by 314% and the antibacterial activity was presented in Mn2+-PNIPAM complex, while the lower critical solution temperature of PNIPAM was not changed.

The results suggest that when the mass fraction of NHMAA is below 5.25%, the lower critical solution temperature (TLCS) decreases with the increasing of mass fraction of NHMAA.

Their SR(20℃C) decreased and the lower critical solution temperature(LCST) increased with increase of r, and the LCSTs of poly (NIPA-co-GMA-Dex) gels are all higher than that of PNIPA gel(32℃).

The experiment showed that gold catalysts prepared by deposition precipitation method when the gold concentration around 0.0097 mol/L, the pH value of chloroauric acid solution at 8, solution temperature at 80℃, the calcination temperature at 300℃, the activity of Au/13X was better.

The electroreduction of Np(Ⅴ) is studied in the N2H5NO3-Fe (Ⅲ) -HNO3 system. Various factors effecting the electrolytic reduction rate of Np(Ⅴ) are studied, and they are acidity of feed solution, temperature, hydrazine and iron ion concentration etc.

The suitable concent-ration of luminol soolution should be 7×10~(-8) mol/ml and a high ratio of signal tonoise can be obtained when solution temperature is in the range of 15-25℃ The rangessuitable for dose measurement have been evaluated based on dose responce characteri-stic of these saccharides.

Moreover, the lower critical solution temperature (LCST) of the graft copolymer in aqueous solution was dependent on its grafting extent and concentration.

Copolymers of N,N-diethylacrylamide and N-acryloylphthalimide with a lower critical solution temperature (LCST) were synthesized by radical copolymerization.

Dynamic membranes were prepared from poly(N-isopropylacrylamide-co-heptadecyl vinyl ketone) having a lower critical solution temperature in an aqueous solution and being a micelle-forming surfactant.

The dependence of the critical concentration of the copolymer micellization on temperature was shown to have an extreme character, with a minimum at the lower critical solution temperature of the copolymer.

Other techniques for solving the above problem, namely, an increase in the temperature of the test solution temperature or the use of solvent extraction, bioaccumulation, and unusual analytical procedures are also considered.

The years before 1965 We had taken the investigation of the effects of salt on the miscibility for benzene-mthanol system. We discovered salts such as NaI, NaClO_4, NaSCN and NH_4I, which dissolve in methanol but sparingly soluble in benzene can turn the benzene-methanol system to a partial miscible one (a two phase system of three components). In addition, We found also that there exist a fair linear relation between the amount of salt added and the miscible temperature of the partial miscible system formed...

The years before 1965 We had taken the investigation of the effects of salt on the miscibility for benzene-mthanol system. We discovered salts such as NaI, NaClO_4, NaSCN and NH_4I, which dissolve in methanol but sparingly soluble in benzene can turn the benzene-methanol system to a partial miscible one (a two phase system of three components). In addition, We found also that there exist a fair linear relation between the amount of salt added and the miscible temperature of the partial miscible system formed by adding the above salts to benzene-methanol mixture with a fixed molecular ratio. The upper end of such straight lines lies on the binodal curve developed by salt saturation, while the lower end lies on the intrinsic coexistanc(?) curve with the amount of salt equals to zero. The benzene-methanol system, when saturated with NaI, goes form complete miscibility to a par- tial miscible system with an upper critical solution temperature at 130.5℃, but when extrapolated by using the straight lines to zero amount of salt, the intrinsic coexistance curve obtained with U. C. S. T. within the region -60℃～-70℃. Recently, for comparison we recalculated the data of salts in cyclohexane-methanol system, which had studied early by Eckfeldt and Lucasse in 1945. Not only the straight line relationship still present, but also the extrapolated no salt coexistance curve coinsides with the experimental curve of this partial miscible system in ordinary pressure almost completely. According to Prigogine, the following (((?)T)/((?)x3))_c=-1/(2R)((α_(AB)-α_(AS)+α_(BS))(α_(AB)-α_(BC)+α_(AS)))/α_(AB) gives the variation of the eritical solution temperature of a strictly regular solution caused by the addition of a third component. For the α's all are constants, thus this equation represents the li- near relation between temperature variation and the amount of the third oomponent being added. But, although this equation is in fact derived from the critical point of a strictly regular solution, there no reasons to consider it can not serve to any other points on the coexistance curve. Furth- ermore, verified by many experiments, this linear relationship can hold satisfactory for many com- mon binary liquid solutions no matter what special kinds the solution must belong. Therefore the above equation can be written as T=mX_s+T_o by rejecting the restrictions, where m is related to constants α_(AB), α_(AS) and α_(BS).

In previous work the linear relation between the amount of a certain salt added and the miscible temperature has been found for the non-polar-polar binary liquid system. In this paper we will further prove that above linear relation can also be applied to polar-polar binary liquid system by investigating acetone-wa- ter-sodium sulfate system. In addition, the t-X_(Na_2SO_4) lines have been extrapolated to zero amount of salt and a series of t_0 values obtained. From these data the upper critical solution curve...

In previous work the linear relation between the amount of a certain salt added and the miscible temperature has been found for the non-polar-polar binary liquid system. In this paper we will further prove that above linear relation can also be applied to polar-polar binary liquid system by investigating acetone-wa- ter-sodium sulfate system. In addition, the t-X_(Na_2SO_4) lines have been extrapolated to zero amount of salt and a series of t_0 values obtained. From these data the upper critical solution curve is plotted, the critical solution temperature is about-47℃ and its correspon- ding component X_(CH_3COCH_3) 0.18. As might be expected our experimental results are clearly in accord with the qualitative rules of Timmermans and the quantita- tive treatment of prigogine.

The critical micelle concentration (CMC) of three kinds of polyoxyethylene-polyoxypro-pylene block copolymer-L64, AE21, AP221 has been measured by surface tension and ben-zopurpurine uptake. Results showed that L64 and AE21 form monomolecular micelles atlow concentration and aggregated micelles at high concentration, while AP221 only formsaggregated micelle at low concentration. Measurement of CMC at different temperatureshowed that in aqueous solution temperature has little effect on the CMC of L64 for...

The critical micelle concentration (CMC) of three kinds of polyoxyethylene-polyoxypro-pylene block copolymer-L64, AE21, AP221 has been measured by surface tension and ben-zopurpurine uptake. Results showed that L64 and AE21 form monomolecular micelles atlow concentration and aggregated micelles at high concentration, while AP221 only formsaggregated micelle at low concentration. Measurement of CMC at different temperatureshowed that in aqueous solution temperature has little effect on the CMC of L64 for monomo-lecular micellization, but has marked effect for aggregated micellization which decreasessharply with increase of temperature. Heat of formation of aggregated micelle has a largevalue, of 140. 6kJ/mol.