Chlorococcum sp. could maintain definite growth in concentration range of 1.500~15.000g/L N; and its physiological response mechanism was due to the enhancing of enzymic activity of NR of nitrogen source and acsiding activity enhancement of cell peroxidized enzymes POD and CAT.
The resultingelectrode displays a near-Nernstian potentioˉmetric response for0.1-1.0×106 mol/L iodide with a detection limit of8.9×10-7 mol/L and a slope of-57mV/pI in phosphate buffer solutions of pH2.5at25℃. Moreover,the response mechanism of the electrode was discussed with the a. c.
The Co - salen film electrode showed a slope of - 72. 5mV/dec and a super -Nernst ion potentiometric response to iodide ions over the range of 2×10-6-1.0×10-1 mol/L. The effect of pH,film thickness and the response mechanism are discussed. The electrodes were applied in the determination of iodine in injection preparations.
It needs to pay more attention for using the seismic displacement model in the dynamic analysis of structure. (2) Using the finite element procedure, the dynamic response mechanism of Wanxian Yangtze River Bridge under the excitation of horizontal harmonic traveling wave with different frequency is researched.
This paper puts forward a perfect standard demarcating method of online automatic analysis instrument,through systemetic analysis to the method principle, response mechanism and characteristic of this analysis instrument ,and has solved this problem.
In adjusting the structures, China should set up a kind of response mechanism which is suitable for the Chinese situation so as to fulfil double upgrade in industrial structure and consumption structure.
Water stress mimicked by PEG-6000 solution(ψs=-0.2 MPa,stress period 48 h,then rehydration 48 h) was performed on leaves of alfalfa(Medicago sativa L) varieties of Longdong and Algonquin seedlings. Chlorophyll fluorescence parameters and photosynthetic pigments concentration were measured. These measurements were used to investigate the available photosynthetic response mechanism to different water conditions.