[ Objective ]The aim of this study was to discuss the feasibility of breeding cabbage with high Vc by 532 nm laser.[ Method ] With the material of cabbage, the embryo of cabbage seeds was irradiated by frequency doubl...[ Objective ]The aim of this study was to discuss the feasibility of breeding cabbage with high Vc by 532 nm laser.[ Method ] With the material of cabbage, the embryo of cabbage seeds was irradiated by frequency doubled Nd ：YAG laser with different power densities and time, and the effects of laser mode on functional leaf area, chlorophyll and Vc contents in cabbage seedlings were also studied. [Result] The results showed that functional leaf area and chlorophyll content were related to laser power density and time when laser power density was 2 -20 mW/mm^2, while the optimal effect was observed at 14 mW/mm^2 for 1 min. The content of Vc in cabbage seedlings was related to dosage of laser irradiation when irradiating time ranged from 1 to 5 min, and the optimal effect was observed at 2.8 J （20 mW/mm^2, 3 min）. [Conclusion] Irradiating the embryo of cabbage seeds with proper irradiation dosage of 532 nm laser can increase its effect on the Vc content significantly.展开更多
Ultrasonic and jet combined process was studied to remove determined by static experiments, and stability of this combined process algae in lake type raw water. The optimum reaction time was was checked by dynamic exp...Ultrasonic and jet combined process was studied to remove determined by static experiments, and stability of this combined process algae in lake type raw water. The optimum reaction time was was checked by dynamic experiments. The results was showed that ultrasonic/jet combined process has excellent removal efficiency on algae in lake type raw water, and it＇s a simple operation, and has no secondary pollution. When the pH, temperature, chlorophyll-a（Chl-a） and cell concentration（OD560） of raw water are 7.69, 25.8 ℃, 29.003 mg/m^3 and 0.091, the average removal efficiency on Chl-a and OD560 are 81.60% and 80.22%, respectively, which are stable by this combined process when it is operating in 36 hours, and samples are analyzed each 4 hours.展开更多
The influence of nitric acid （HNO3） as a strong mineral acid on rooting response of fresh mad aging mung bean cuttings has been studied on the level of Indole-3-Acetic Acid （IAA）. The data revealed significant inc...The influence of nitric acid （HNO3） as a strong mineral acid on rooting response of fresh mad aging mung bean cuttings has been studied on the level of Indole-3-Acetic Acid （IAA）. The data revealed significant increase in rooting response of fresh cuttings treated with （0.0001% and 0.1%） concentrations of HNO3 solution, significant increase in rooting response of aged cuttings （for 3 days in d/H20） with （0.0001% and 0.01%） concentration of HNO3 solution and highly significant increase in rooting response of aged cuttings （for 3 days in HNO3 solution） with （0.0001%） concentration, while highly concentration （0.5%） revealed highly significant decrease in rooting response compared to control （d/H20）. Quantitative estimation oflAA by spectrophotometric method as indicators for oxidative processes that occurrence during aging phenomenon verified a highly significant increase of IAA content in hypocotyles of fresh and aged cuttings in optimal concentration of HNO3.展开更多
基金Supported by Fund from Jilin Provincial Science & Technology Department(20090541)Project from Department of Education ofJilin Province(200828)~~
文摘[ Objective ]The aim of this study was to discuss the feasibility of breeding cabbage with high Vc by 532 nm laser.[ Method ] With the material of cabbage, the embryo of cabbage seeds was irradiated by frequency doubled Nd ：YAG laser with different power densities and time, and the effects of laser mode on functional leaf area, chlorophyll and Vc contents in cabbage seedlings were also studied. [Result] The results showed that functional leaf area and chlorophyll content were related to laser power density and time when laser power density was 2 -20 mW/mm^2, while the optimal effect was observed at 14 mW/mm^2 for 1 min. The content of Vc in cabbage seedlings was related to dosage of laser irradiation when irradiating time ranged from 1 to 5 min, and the optimal effect was observed at 2.8 J （20 mW/mm^2, 3 min）. [Conclusion] Irradiating the embryo of cabbage seeds with proper irradiation dosage of 532 nm laser can increase its effect on the Vc content significantly.
文摘Ultrasonic and jet combined process was studied to remove determined by static experiments, and stability of this combined process algae in lake type raw water. The optimum reaction time was was checked by dynamic experiments. The results was showed that ultrasonic/jet combined process has excellent removal efficiency on algae in lake type raw water, and it＇s a simple operation, and has no secondary pollution. When the pH, temperature, chlorophyll-a（Chl-a） and cell concentration（OD560） of raw water are 7.69, 25.8 ℃, 29.003 mg/m^3 and 0.091, the average removal efficiency on Chl-a and OD560 are 81.60% and 80.22%, respectively, which are stable by this combined process when it is operating in 36 hours, and samples are analyzed each 4 hours.
文摘The influence of nitric acid （HNO3） as a strong mineral acid on rooting response of fresh mad aging mung bean cuttings has been studied on the level of Indole-3-Acetic Acid （IAA）. The data revealed significant increase in rooting response of fresh cuttings treated with （0.0001% and 0.1%） concentrations of HNO3 solution, significant increase in rooting response of aged cuttings （for 3 days in d/H20） with （0.0001% and 0.01%） concentration of HNO3 solution and highly significant increase in rooting response of aged cuttings （for 3 days in HNO3 solution） with （0.0001%） concentration, while highly concentration （0.5%） revealed highly significant decrease in rooting response compared to control （d/H20）. Quantitative estimation oflAA by spectrophotometric method as indicators for oxidative processes that occurrence during aging phenomenon verified a highly significant increase of IAA content in hypocotyles of fresh and aged cuttings in optimal concentration of HNO3.
