The research performed analysis on differences of physiological property and yield of Tiejing No. 11 by different nitrogen fertilization patterns. The results indicated that while the nitrogen of basal: tillering: pan...The research performed analysis on differences of physiological property and yield of Tiejing No. 11 by different nitrogen fertilization patterns. The results indicated that while the nitrogen of basal: tillering: panicle was 6 ∶3∶1, the higher amount of nitrogen improved the chlorophyll content, photosynthetic capacity, effective panicle, grain weight and yield; the medium nitrogen level had advantage under the ratio 4:3:3; nitrogen application at lategrowth stage was suitable for low or medium nitrogen level,which could increase photosynthetic capacity and optimize the yield components and increase yield; under the same ratio for basic tiller and ear fertilizer, the increase of nitrogen could improve total nitrogen uptake and protein content, decrease nitrogen physiological efficiency and milled rice and tasting, but nitrogen recovery and harvest index changes had difference; as application at late growth stage in same nitrogen rate, total nitrogen uptake and protein content increased, nitrogen physiological efficiency and milled rice and amylose content and tasting decreased, nitrogen recovery and harvest index increased under low or medium nitrogen level and decreased under high nitrogen level. Nitrogen application 210 kg/hm^2 and the ratio 4 ∶3 ∶3 of basal:tillering: panicle made the yield increase by 2.8%-11.3%, and this is the optimal mode of nitrogen fertilizer application.展开更多
In this study, several methods were compared for the efficiency to concentrate venom from the tentacles of jellyfish Rhopilema esculentum Kishinouye. The results show that the methods using either freezing-dry or gel ...In this study, several methods were compared for the efficiency to concentrate venom from the tentacles of jellyfish Rhopilema esculentum Kishinouye. The results show that the methods using either freezing-dry or gel absorption to remove water to concentrate venom are not applicable due to the low concentration of the compounds dissolved. Although the recovery efficiency and the total venom obtained using the dialysis dehydration method are high, some proteins can be lost during the concentrating process. Comparing to the lyophilization method, ultrafiltration is a simple way to concentrate the compounds at high percentage but the hemolytic activities of the proteins obtained by ultrafiltration appear to be lower. Our results suggest that overall lyophilization is the best and recommended method to concentrate venom from the tentacles of jellyfish. It shows not only the high recovery efficiency for the venoms but high hemolytic activities as well.展开更多
基金Supported by National System of Modern Agriculture Industrial Technology(CARS-01-37)Rice Innovation Team of Liaoning Province of National System of Modern Agriculture Industrial Technology([2013]271)Key Agriculture and Achievements Specialization Planning Program of Liaoning Province(2014020004-101-3)
文摘The research performed analysis on differences of physiological property and yield of Tiejing No. 11 by different nitrogen fertilization patterns. The results indicated that while the nitrogen of basal: tillering: panicle was 6 ∶3∶1, the higher amount of nitrogen improved the chlorophyll content, photosynthetic capacity, effective panicle, grain weight and yield; the medium nitrogen level had advantage under the ratio 4:3:3; nitrogen application at lategrowth stage was suitable for low or medium nitrogen level,which could increase photosynthetic capacity and optimize the yield components and increase yield; under the same ratio for basic tiller and ear fertilizer, the increase of nitrogen could improve total nitrogen uptake and protein content, decrease nitrogen physiological efficiency and milled rice and tasting, but nitrogen recovery and harvest index changes had difference; as application at late growth stage in same nitrogen rate, total nitrogen uptake and protein content increased, nitrogen physiological efficiency and milled rice and amylose content and tasting decreased, nitrogen recovery and harvest index increased under low or medium nitrogen level and decreased under high nitrogen level. Nitrogen application 210 kg/hm^2 and the ratio 4 ∶3 ∶3 of basal:tillering: panicle made the yield increase by 2.8%-11.3%, and this is the optimal mode of nitrogen fertilizer application.
基金Supported by the Award Foundation of Scientific Research for Excellent Young and Middle-age Scientist of Shandong Province (No. 2006BS07003)the Knowledge Innovation Project of Chinese Academy of Sciences (KZCX2-YW-R-104)
文摘In this study, several methods were compared for the efficiency to concentrate venom from the tentacles of jellyfish Rhopilema esculentum Kishinouye. The results show that the methods using either freezing-dry or gel absorption to remove water to concentrate venom are not applicable due to the low concentration of the compounds dissolved. Although the recovery efficiency and the total venom obtained using the dialysis dehydration method are high, some proteins can be lost during the concentrating process. Comparing to the lyophilization method, ultrafiltration is a simple way to concentrate the compounds at high percentage but the hemolytic activities of the proteins obtained by ultrafiltration appear to be lower. Our results suggest that overall lyophilization is the best and recommended method to concentrate venom from the tentacles of jellyfish. It shows not only the high recovery efficiency for the venoms but high hemolytic activities as well.
