The aims were to investigate the effect of salt stress on key enzyme activity of nitrogen metabolism and the concentration of nitrate nitrogen and ammonium nitrogen response to salt stress.Two rice cultivars,Mudanjian...The aims were to investigate the effect of salt stress on key enzyme activity of nitrogen metabolism and the concentration of nitrate nitrogen and ammonium nitrogen response to salt stress.Two rice cultivars,Mudanjiang 30(sensitive cultivar)and Longdao 5(salt-tolerant cultivar),were treated with different salt concentrations(CK 0%,S10.075%,S20.15%,S30.225%and S40.3%).The results showed that the activities of nitrate reductase(NR),glutamine synthase(GS),glutamate synthase(GOGAT)and glutamate dehydrogenase(GDH)in the functional leaves and roots of rice in cold region presented a single peak curve change and the peak occurred in the heading stage;compared with those of the CK,the activities of NR,GS and GOGAT of rice in cold region decreased,but the activity of GDH increased in the heading stage under salt stress.The variation for key enzyme activity of nitrogen metabolism was the highest under S4 treatment.The activities of NR,GS and GOGAT in the functional leaves significantly decreased compared with those in roots;the concentrations of nitrate nitrogen and ammonium nitrogen in the functional leaves and roots of rice in cold region presented a single peak curve change and the peak occurred in the heading stage;compared with that of the CK,the concentration of nitrate nitrogen decreased in leaves and roots,the concentration of ammonium nitrogen decreased and the concentration of ammonium nitrogen in roots increased under salt stress.The variations for the activities of NR,GS and GOGAT in the functional leaves and roots of Longdao 5 were less than those of Mudanjiang 30 under the same concentration of salt stress.展开更多
This paper mainly focused on the growth law, model construction and visualization of a soybean root. A pot experiment was conducted in the laboratory to collect root system data and measure soybean root＇s length, dia...This paper mainly focused on the growth law, model construction and visualization of a soybean root. A pot experiment was conducted in the laboratory to collect root system data and measure soybean root＇s length, diameter and number by excavating in different periods. On the basis of an in-depth analysis of root structure geometry, we analyzed the collected experimental data with logistic equations, and got the growth of soybean root equation, according to its morphological structure characteristics of self-similarity, and discussed the virtual modeling method on the soybean root based on L-system and in Visual c＋＋ Using OpenGL technology to achieve a soybean root system topology model and visualization simulation.展开更多
Cyperus esculentus root oil(CEL)is a plant of significant economic value,rich in unsaturated fatty acids like oleic acid,linoleic acid,and linolenic acid.In this study,human dermal fibroblasts(HSF)were used to create ...Cyperus esculentus root oil(CEL)is a plant of significant economic value,rich in unsaturated fatty acids like oleic acid,linoleic acid,and linolenic acid.In this study,human dermal fibroblasts(HSF)were used to create an inflammatory model,and the impact of coldpressed oil from CEL on the secretion of inflammatory factors was assessed.The results showed that CEL significantly inhibited IL-6 and IL-1βthat were secreted by HSF cells induced by tumor necrosis factor-α(TNF-α)(P<0.0001),with inhibition rates of 50.79%and 20.26%,respectively.Furthermore,CEL markedly enhanced the secretion of the anti-inflammatory factor IL-10(P<0.01),with an improvement rate of 94.42%.The study further explored the impact of CEL on collagen type I(Col-I)and hyaluronic acid(HA)secretion in the cells.The results demonstrated that CEL effectively increased Col-I secretion by 26.15%(P<0.0001)and HA by 30.2%(P<0.0001)when it was administered at a maximum safe mass fraction of 6%,which consequently showed its potential anti-aging and moisturizing properties.Additionally,fluorescence real-time quantitative polymerase chain reaction(PCR)experiments confirmed that CEL significantly inhibited the TNF-α-induced expression of IL-6,IL-1β,and matrix metalloproteinases(MMP-1,3,9)in HSF cells,while promoted the mRNA expression levels of IL-10 and hyaluronic acid synthase.This modulation suggested that CEL exerted anti-inflammatory and anti-aging effects.Finally,the oil’s anti-inflammatory,anti-senility,and moisturizing effects were validated through the clinical evaluations.In summary,CEL,as a natural raw material abundant in unsaturated fatty acids,shows promising potential for further development and usage in cosmetics due to its anti-inflammatory,anti-aging,and moisturizing properties in personal care.展开更多
Objective: To estimate the presence and the quantity of endotoxin of periodontally involved root surfaces after root surface debridement.Methods: Ninety single rooted teeth with severe bone resorption were selected,wh...Objective: To estimate the presence and the quantity of endotoxin of periodontally involved root surfaces after root surface debridement.Methods: Ninety single rooted teeth with severe bone resorption were selected,which were scheduled for extraction.The teeth were randomly assigned into 3 groups.The teeth in the first group were served as control and they did not receive any debridement.The teeth in the second group were scaled and root planned with Gracey curettes.The teeth in the third group were debrided with the new ultrasonic device VectorTM-system(Dürr Dental).The endotoxin concentrations before and after debridement were assessed by Limulus Amebocyte Lysat(LAL).Results: The concentration of endotoxin of periodontally involved teeth in the control group was 0.825 EU/ml.Scaling and root planning resulted in a significant reduction of the values as follows: Gracey curettes 0.240 EU/ml,VectorTM-system 0.184 EU/ml.Conclusion: Scaling and root planning leads to obvious reduction of the endotoxin on periodontally involved root surfaces and VectorTM-system is comparatively more effective than Gracey curettes.展开更多
基金Supported by the National Key R&D Program of China(2016YFD0300104)。
文摘The aims were to investigate the effect of salt stress on key enzyme activity of nitrogen metabolism and the concentration of nitrate nitrogen and ammonium nitrogen response to salt stress.Two rice cultivars,Mudanjiang 30(sensitive cultivar)and Longdao 5(salt-tolerant cultivar),were treated with different salt concentrations(CK 0%,S10.075%,S20.15%,S30.225%and S40.3%).The results showed that the activities of nitrate reductase(NR),glutamine synthase(GS),glutamate synthase(GOGAT)and glutamate dehydrogenase(GDH)in the functional leaves and roots of rice in cold region presented a single peak curve change and the peak occurred in the heading stage;compared with those of the CK,the activities of NR,GS and GOGAT of rice in cold region decreased,but the activity of GDH increased in the heading stage under salt stress.The variation for key enzyme activity of nitrogen metabolism was the highest under S4 treatment.The activities of NR,GS and GOGAT in the functional leaves significantly decreased compared with those in roots;the concentrations of nitrate nitrogen and ammonium nitrogen in the functional leaves and roots of rice in cold region presented a single peak curve change and the peak occurred in the heading stage;compared with that of the CK,the concentration of nitrate nitrogen decreased in leaves and roots,the concentration of ammonium nitrogen decreased and the concentration of ammonium nitrogen in roots increased under salt stress.The variations for the activities of NR,GS and GOGAT in the functional leaves and roots of Longdao 5 were less than those of Mudanjiang 30 under the same concentration of salt stress.
基金Supported by the Scientific Research Project of Heilongjiang Province(11551054)
文摘This paper mainly focused on the growth law, model construction and visualization of a soybean root. A pot experiment was conducted in the laboratory to collect root system data and measure soybean root＇s length, diameter and number by excavating in different periods. On the basis of an in-depth analysis of root structure geometry, we analyzed the collected experimental data with logistic equations, and got the growth of soybean root equation, according to its morphological structure characteristics of self-similarity, and discussed the virtual modeling method on the soybean root based on L-system and in Visual c＋＋ Using OpenGL technology to achieve a soybean root system topology model and visualization simulation.
文摘Cyperus esculentus root oil(CEL)is a plant of significant economic value,rich in unsaturated fatty acids like oleic acid,linoleic acid,and linolenic acid.In this study,human dermal fibroblasts(HSF)were used to create an inflammatory model,and the impact of coldpressed oil from CEL on the secretion of inflammatory factors was assessed.The results showed that CEL significantly inhibited IL-6 and IL-1βthat were secreted by HSF cells induced by tumor necrosis factor-α(TNF-α)(P<0.0001),with inhibition rates of 50.79%and 20.26%,respectively.Furthermore,CEL markedly enhanced the secretion of the anti-inflammatory factor IL-10(P<0.01),with an improvement rate of 94.42%.The study further explored the impact of CEL on collagen type I(Col-I)and hyaluronic acid(HA)secretion in the cells.The results demonstrated that CEL effectively increased Col-I secretion by 26.15%(P<0.0001)and HA by 30.2%(P<0.0001)when it was administered at a maximum safe mass fraction of 6%,which consequently showed its potential anti-aging and moisturizing properties.Additionally,fluorescence real-time quantitative polymerase chain reaction(PCR)experiments confirmed that CEL significantly inhibited the TNF-α-induced expression of IL-6,IL-1β,and matrix metalloproteinases(MMP-1,3,9)in HSF cells,while promoted the mRNA expression levels of IL-10 and hyaluronic acid synthase.This modulation suggested that CEL exerted anti-inflammatory and anti-aging effects.Finally,the oil’s anti-inflammatory,anti-senility,and moisturizing effects were validated through the clinical evaluations.In summary,CEL,as a natural raw material abundant in unsaturated fatty acids,shows promising potential for further development and usage in cosmetics due to its anti-inflammatory,anti-aging,and moisturizing properties in personal care.
文摘Objective: To estimate the presence and the quantity of endotoxin of periodontally involved root surfaces after root surface debridement.Methods: Ninety single rooted teeth with severe bone resorption were selected,which were scheduled for extraction.The teeth were randomly assigned into 3 groups.The teeth in the first group were served as control and they did not receive any debridement.The teeth in the second group were scaled and root planned with Gracey curettes.The teeth in the third group were debrided with the new ultrasonic device VectorTM-system(Dürr Dental).The endotoxin concentrations before and after debridement were assessed by Limulus Amebocyte Lysat(LAL).Results: The concentration of endotoxin of periodontally involved teeth in the control group was 0.825 EU/ml.Scaling and root planning resulted in a significant reduction of the values as follows: Gracey curettes 0.240 EU/ml,VectorTM-system 0.184 EU/ml.Conclusion: Scaling and root planning leads to obvious reduction of the endotoxin on periodontally involved root surfaces and VectorTM-system is comparatively more effective than Gracey curettes.
