The ESMD method can be seen as a new alternate of the well-known Hilbert-Huang transform (HHT) for non-steady data processing. It is good at finding the optimal adaptive global mean fitting curve, which is superior to...The ESMD method can be seen as a new alternate of the well-known Hilbert-Huang transform (HHT) for non-steady data processing. It is good at finding the optimal adaptive global mean fitting curve, which is superior to the common least-square method and running-mean approach. Take the air-sea momentum flux investigation as an example, only when the non-turbulent wind components is well extracted, can the remainder signal be seen as actual oscillations caused by turbulence. With the aid of —5/3 power law for the turbulence, a mode-filtering approach based on ESMD decomposition is developed here. The test on observational data indicates that this approach is very feasible and it may greatly reduce the error caused by the non-turbulent components.展开更多
Organic electrode materials are receiving ever-increasing research interest due to their combined advantages,including resource renewability,low cost,and environmental friendliness.However,their practical applications...Organic electrode materials are receiving ever-increasing research interest due to their combined advantages,including resource renewability,low cost,and environmental friendliness.However,their practical applications are still terribly plagued by low conductivity,poor rate capability,solubility in electrolyte,and low density/utilization of active groups.In response,herein,as a proof-of-concept experiment,C=N and C=O bonds are synergically integrated into the backbone of pentacene to fnely tune the electronic structures of pentacene.Unexpectedly,the frstly obtained unique 5,7,11,14-tetraaza-6,13-pentacenequinone/reduced graphene oxide(TAPQ/RGO)composite exhibits superior electrochemical performances,including an ultra-stable cycling stability(up to 2400 cycles)and good rate capability(174 mAh g−1 even at a high current density of 3.2 A g−1),which might be attributed to the abundant active groups,�-conjugated molecular structure,leaf-like morphology,and the interaction between TAPQ and graphene.展开更多
Alkali-ion batteries,including potassium-ion batter-ies,lithium-ion batteries,and sodium-ion batteries are important energy storage devices;however,with the cation size increased,there exists a great challenge for an ...Alkali-ion batteries,including potassium-ion batter-ies,lithium-ion batteries,and sodium-ion batteries are important energy storage devices;however,with the cation size increased,there exists a great challenge for an inorganic electrode material to accommodate the different properties of the alkali-ion.Herein,as a proof-of-concept experiment,an imine-rich poly(o-phenylenediamine)(PoPD)is syn-thesized through a rational controllable oxidization.Due to the abundance of active sites and ladder-conjugated structure,PoPD in the optimized oxida-tion state endows alkali-ion batteries with a stable cyclability at high capacity.The highly reversible redox performance of PoPD with alkali-ions is verified by theoretical calculations and demonstrat-ed as a trifunctional electrode material(537 and 307 mAh·g^(−1) for Li and Na storage capacity after 300 cycles,respectively),especially for successful application in potassium storage(450 mAh·g^(−1) after 205 cycles),and provides compelling evidence for the wide application of organic electrode materials.展开更多
This study investigates the long-term effects of oral tea polyphenols （TPs） and Lactobacillus brevis M8 （LB） on biochemical parameters, digestive enzymes, and cytokines expression in broilers. In experiment 1,240 ...This study investigates the long-term effects of oral tea polyphenols （TPs） and Lactobacillus brevis M8 （LB） on biochemical parameters, digestive enzymes, and cytokines expression in broilers. In experiment 1,240 broiler chickens were selected to investigate the effects of 0.06 g/kg body weight （BW） TP and 1.0 ml/kg BW LB on broilers; in experiment 2, 180 broiler chickens were assigned randomly to three groups to investigate the effects of different dosages of TP （0.03, 0.06, and 0.09 g/kg BW） combined with 1.0 ml/kg BW LB on broilers; in experiment 3, 180 broiler chickens were assigned randomly to three groups to investigate the effects of different dosages of LB （0.5, 1.0, and 1.5 ml/kg BW） combined with 0.06 g/kg BW TP on broilers. The results showed that TP and LB affected serum biochemical parameters, and TP reduced serum cholesterol （CHO） and low-density lipoprotein cholesterol （LDL-C） abundances in a dosage-dependent manner （P〈0.05） on Day 84. Meanwhile, broilers fed a diet supplemented with TP or LB had a lower intestinal lipase activity on Day 84 compared with the control group （P〈0.05）. Middle and high dosages of TP increased pancreatic lipase and proventriculus pepsin activities （P〈0.05）. Also middle and high dosages of LB significantly enhanced pancreatic lipase activity （P〈0.05）, while high LB supplementation inhibited intestinal trypsase （P〈0.05） on Day 84. Furthermore, both TP and LB reduced intestinal cytokine expression and nuclear factor-K B （NF-KB） mRNA level on Days 56 and 84. In conclusion, long-term treatment of TP and LB improved lipid metabolism and digestive enzymes activities, and affected intestinal inflammatory status, which may be associated with the NF-KB signal.展开更多
Xiangxi flavor vinegar（XV） is one of Hunan Province＇s traditional fermented vinegars.It is produced from herb,rice,and spring water with spontaneous liquid-state fermentation techniques.In this study,we investigate...Xiangxi flavor vinegar（XV） is one of Hunan Province＇s traditional fermented vinegars.It is produced from herb,rice,and spring water with spontaneous liquid-state fermentation techniques.In this study,we investigated the antioxidant property of XV by analyzing its antioxidant compounds,its free radical scavenging property in vitro and in vivo,and its effects on antioxidant enzyme activity and apoptosis in Caenorhabditis elegans.The results showed that XV is rich in antioxidants.In particular,ligustrazine reached 6.431 μg/ml.The in vitro 2,2-diphenyl-1-picrylhydrazyl free radical（DPPH＊）,hydroxyl radical（＊OH）,and superoxide anion radical（O2^（＊-）） scavenging rates of XV were 95.85%,97.22%,and 63.33%,respectively.The reactive oxygen species（ROS） content in XV-treated C.elegans decreased significantly（P0.01） compared to the control group.Giutathione peroxidase（GSH-Px）,superoxide dismutase（SOD）,and catalase（CAT） activities were remarkably increased（P0.01） in C.elegans after XV treatment.In addition,XV could upreguiate CED-9 protein expression and downreguiate CED-3 protein expression in C.elegans.These results prove that XV is rich in antioxidants and scavenges radicals in vitro efficiently.XV inhibits apoptosis in C.elegans probably by scavenging ROS and increasing the activities of its antioxidant enzymes.展开更多
文摘The ESMD method can be seen as a new alternate of the well-known Hilbert-Huang transform (HHT) for non-steady data processing. It is good at finding the optimal adaptive global mean fitting curve, which is superior to the common least-square method and running-mean approach. Take the air-sea momentum flux investigation as an example, only when the non-turbulent wind components is well extracted, can the remainder signal be seen as actual oscillations caused by turbulence. With the aid of —5/3 power law for the turbulence, a mode-filtering approach based on ESMD decomposition is developed here. The test on observational data indicates that this approach is very feasible and it may greatly reduce the error caused by the non-turbulent components.
基金Tis work was fnancially supported by the National Natural Science Foundation of China(21725103 and 51472232),JCKY2016130B010Jilin Province Science and Technology Development Plan Funding Project(20180101203JC,20160101289JC)and Changchun Science and Technology Development Plan Funding Project(18DY012).
文摘Organic electrode materials are receiving ever-increasing research interest due to their combined advantages,including resource renewability,low cost,and environmental friendliness.However,their practical applications are still terribly plagued by low conductivity,poor rate capability,solubility in electrolyte,and low density/utilization of active groups.In response,herein,as a proof-of-concept experiment,C=N and C=O bonds are synergically integrated into the backbone of pentacene to fnely tune the electronic structures of pentacene.Unexpectedly,the frstly obtained unique 5,7,11,14-tetraaza-6,13-pentacenequinone/reduced graphene oxide(TAPQ/RGO)composite exhibits superior electrochemical performances,including an ultra-stable cycling stability(up to 2400 cycles)and good rate capability(174 mAh g−1 even at a high current density of 3.2 A g−1),which might be attributed to the abundant active groups,�-conjugated molecular structure,leaf-like morphology,and the interaction between TAPQ and graphene.
基金This work was financially supported by the National Natural Science Foundation of China(21725103and51472232),JCKY2016130B010,Jilin Province Science and Technolo-gy Development Plan Funding Project(20180101203JC and 20160101289JC)Changchun Science and Tech-nologyDevelopmentPlanFundingProject(18DY012).
文摘Alkali-ion batteries,including potassium-ion batter-ies,lithium-ion batteries,and sodium-ion batteries are important energy storage devices;however,with the cation size increased,there exists a great challenge for an inorganic electrode material to accommodate the different properties of the alkali-ion.Herein,as a proof-of-concept experiment,an imine-rich poly(o-phenylenediamine)(PoPD)is syn-thesized through a rational controllable oxidization.Due to the abundance of active sites and ladder-conjugated structure,PoPD in the optimized oxida-tion state endows alkali-ion batteries with a stable cyclability at high capacity.The highly reversible redox performance of PoPD with alkali-ions is verified by theoretical calculations and demonstrat-ed as a trifunctional electrode material(537 and 307 mAh·g^(−1) for Li and Na storage capacity after 300 cycles,respectively),especially for successful application in potassium storage(450 mAh·g^(−1) after 205 cycles),and provides compelling evidence for the wide application of organic electrode materials.
文摘This study investigates the long-term effects of oral tea polyphenols （TPs） and Lactobacillus brevis M8 （LB） on biochemical parameters, digestive enzymes, and cytokines expression in broilers. In experiment 1,240 broiler chickens were selected to investigate the effects of 0.06 g/kg body weight （BW） TP and 1.0 ml/kg BW LB on broilers; in experiment 2, 180 broiler chickens were assigned randomly to three groups to investigate the effects of different dosages of TP （0.03, 0.06, and 0.09 g/kg BW） combined with 1.0 ml/kg BW LB on broilers; in experiment 3, 180 broiler chickens were assigned randomly to three groups to investigate the effects of different dosages of LB （0.5, 1.0, and 1.5 ml/kg BW） combined with 0.06 g/kg BW TP on broilers. The results showed that TP and LB affected serum biochemical parameters, and TP reduced serum cholesterol （CHO） and low-density lipoprotein cholesterol （LDL-C） abundances in a dosage-dependent manner （P〈0.05） on Day 84. Meanwhile, broilers fed a diet supplemented with TP or LB had a lower intestinal lipase activity on Day 84 compared with the control group （P〈0.05）. Middle and high dosages of TP increased pancreatic lipase and proventriculus pepsin activities （P〈0.05）. Also middle and high dosages of LB significantly enhanced pancreatic lipase activity （P〈0.05）, while high LB supplementation inhibited intestinal trypsase （P〈0.05） on Day 84. Furthermore, both TP and LB reduced intestinal cytokine expression and nuclear factor-K B （NF-KB） mRNA level on Days 56 and 84. In conclusion, long-term treatment of TP and LB improved lipid metabolism and digestive enzymes activities, and affected intestinal inflammatory status, which may be associated with the NF-KB signal.
基金supported by the College of Food Science and Technology,Hunan Agricultural University,China
文摘Xiangxi flavor vinegar（XV） is one of Hunan Province＇s traditional fermented vinegars.It is produced from herb,rice,and spring water with spontaneous liquid-state fermentation techniques.In this study,we investigated the antioxidant property of XV by analyzing its antioxidant compounds,its free radical scavenging property in vitro and in vivo,and its effects on antioxidant enzyme activity and apoptosis in Caenorhabditis elegans.The results showed that XV is rich in antioxidants.In particular,ligustrazine reached 6.431 μg/ml.The in vitro 2,2-diphenyl-1-picrylhydrazyl free radical（DPPH＊）,hydroxyl radical（＊OH）,and superoxide anion radical（O2^（＊-）） scavenging rates of XV were 95.85%,97.22%,and 63.33%,respectively.The reactive oxygen species（ROS） content in XV-treated C.elegans decreased significantly（P0.01） compared to the control group.Giutathione peroxidase（GSH-Px）,superoxide dismutase（SOD）,and catalase（CAT） activities were remarkably increased（P0.01） in C.elegans after XV treatment.In addition,XV could upreguiate CED-9 protein expression and downreguiate CED-3 protein expression in C.elegans.These results prove that XV is rich in antioxidants and scavenges radicals in vitro efficiently.XV inhibits apoptosis in C.elegans probably by scavenging ROS and increasing the activities of its antioxidant enzymes.
