It was found from experiments that the addition of polythylene glycol (PEG) can make the B-Z and B-R reactions producing double induction periods, i.e. before the general induction period there is an earlier stage of ...It was found from experiments that the addition of polythylene glycol (PEG) can make the B-Z and B-R reactions producing double induction periods, i.e. before the general induction period there is an earlier stage of induction in which there is no any change of color and state. The lifetime of the earlier stage is not noly effected by the concentration of PEG, but also by the time of the last reagent added. It was also found that there are two linear relationships between the concentration of PEG and the reduced viscodity of PEG solution or/and the lifetime of the earlier stage of induction. Another characteristic of PEG effect is that it can decrease the period change during the oscillat ing reactions. These experimental results are not only useful in the research pf chemical oscillation, but also give a simple method for determining colligative properties of macro molecule sultion.展开更多
Using oscillation potential method, the energy and the bacteriostasis of some traditional Chinese medicine are studied. Medicine Qin Ⅰ and Xin Ⅱ have very high energy and good bacte- riostasis. They can also elimina...Using oscillation potential method, the energy and the bacteriostasis of some traditional Chinese medicine are studied. Medicine Qin Ⅰ and Xin Ⅱ have very high energy and good bacte- riostasis. They can also eliminate free radical.展开更多
On the basis of Oregonator model, the influence of acid on B- Z oscillating reaction is analyzed, the dynamic regime of B- Z reaction with acid value B and model parameter h (the concentration of NaBrO3 is certain), a...On the basis of Oregonator model, the influence of acid on B- Z oscillating reaction is analyzed, the dynamic regime of B- Z reaction with acid value B and model parameter h (the concentration of NaBrO3 is certain), and the time - series plots、 2- D and 3- D phase plots of each component under different acid conditions are given,and also the curves of acid B vs. oscillating period and amplitude.This made the theory of the threshold values of B- Z oscillating reaction more completely. The experimental results proved that the model is correct.展开更多
It is reported in this paper that a tetraazamacrocyclic nickel complex NiL(CIO4,)2, where L is 2, 4, 4, 9, 11, 11-hexamethyl-1, 5, 8, 12 -tetraazacyclotetradeca- 1, 5, 8, 12- tetraene, can serve as oscillating catalys...It is reported in this paper that a tetraazamacrocyclic nickel complex NiL(CIO4,)2, where L is 2, 4, 4, 9, 11, 11-hexamethyl-1, 5, 8, 12 -tetraazacyclotetradeca- 1, 5, 8, 12- tetraene, can serve as oscillating catalyst in the system of NaBrO3-Pyr-H2SO4. The ranges of initial concentration of main reactants in the system were obtained. The influence of temperature, Vc, Br-, Ag+, Hg2+, acetonitrile or acrylamide on the oscillations were discussed. The results indicated that Br- played an important role controlling reaction progress and some free radicals.Br2 may be involved in the reaction process. The stirring rate can affect oscillating reactions. The oscillation trajectories of this system were recorded. They are different from classical BZ reactions and some other tetraazamacrocyclic complexes catalyzed systems. The mechanism is briefly discussed.展开更多
文摘It was found from experiments that the addition of polythylene glycol (PEG) can make the B-Z and B-R reactions producing double induction periods, i.e. before the general induction period there is an earlier stage of induction in which there is no any change of color and state. The lifetime of the earlier stage is not noly effected by the concentration of PEG, but also by the time of the last reagent added. It was also found that there are two linear relationships between the concentration of PEG and the reduced viscodity of PEG solution or/and the lifetime of the earlier stage of induction. Another characteristic of PEG effect is that it can decrease the period change during the oscillat ing reactions. These experimental results are not only useful in the research pf chemical oscillation, but also give a simple method for determining colligative properties of macro molecule sultion.
文摘Using oscillation potential method, the energy and the bacteriostasis of some traditional Chinese medicine are studied. Medicine Qin Ⅰ and Xin Ⅱ have very high energy and good bacte- riostasis. They can also eliminate free radical.
文摘On the basis of Oregonator model, the influence of acid on B- Z oscillating reaction is analyzed, the dynamic regime of B- Z reaction with acid value B and model parameter h (the concentration of NaBrO3 is certain), and the time - series plots、 2- D and 3- D phase plots of each component under different acid conditions are given,and also the curves of acid B vs. oscillating period and amplitude.This made the theory of the threshold values of B- Z oscillating reaction more completely. The experimental results proved that the model is correct.
文摘It is reported in this paper that a tetraazamacrocyclic nickel complex NiL(CIO4,)2, where L is 2, 4, 4, 9, 11, 11-hexamethyl-1, 5, 8, 12 -tetraazacyclotetradeca- 1, 5, 8, 12- tetraene, can serve as oscillating catalyst in the system of NaBrO3-Pyr-H2SO4. The ranges of initial concentration of main reactants in the system were obtained. The influence of temperature, Vc, Br-, Ag+, Hg2+, acetonitrile or acrylamide on the oscillations were discussed. The results indicated that Br- played an important role controlling reaction progress and some free radicals.Br2 may be involved in the reaction process. The stirring rate can affect oscillating reactions. The oscillation trajectories of this system were recorded. They are different from classical BZ reactions and some other tetraazamacrocyclic complexes catalyzed systems. The mechanism is briefly discussed.
