[Objective]This paper was to research the water purification mechanism of Ipomoea aquatica and its correlation with algae and rotifer. [Methods]Taking I. aquatica as the test material,Chlorella vulgaris,Scenedesmus ob...[Objective]This paper was to research the water purification mechanism of Ipomoea aquatica and its correlation with algae and rotifer. [Methods]Taking I. aquatica as the test material,Chlorella vulgaris,Scenedesmus obliquus,Microcystis aeroginosa and rotifer Adineta vaga with different densities were added to the hydroponics nutrients solutions of I. aquatica by the hydroponic ecological simulation method. The growth characteristics of I. aquatica,changes of microbial populations and the consumption status of nutrients in the nutritional solution were determined. And the interactions between the plant and the microbial populations were researched. [Results]When I. aquatica seedlings grew to a certain stage,growth of principal root stopped; while the lateral roots emerged greatly; and the nutrition absorption efficiency enhanced. As the inoculation concentration of C. vulgaris increased,root length of I. aquatica increased relatively great due to the competition for nutrients. The competition and allelopathy of M. aeroginosa and S. obliquus restricted the development of root system of I. aquatica. The grazing pressure of Chlorella vulgaris had little effects on M. aeroginosa,but restricted the rapid growth of S. obliquus. [Conclusions]This research provided data support for the application of fish-shrimp-vegetable aquaculture system.展开更多
本文通过对水蕹菜净化含银废水的室内外静、动态试验研究得出:(1)水蕹菜对离子态银(Ag^+)的去除速率高于对络合态银[Ag(S_2O_3)_2]^(3-)的去除速率即 K_(Ag)+>K[Ag(S_2O_3)_2]^(3-);(2)水蕹菜对银的净化率 R 与污水停留时间 t 呈指...本文通过对水蕹菜净化含银废水的室内外静、动态试验研究得出:(1)水蕹菜对离子态银(Ag^+)的去除速率高于对络合态银[Ag(S_2O_3)_2]^(3-)的去除速率即 K_(Ag)+>K[Ag(S_2O_3)_2]^(3-);(2)水蕹菜对银的净化率 R 与污水停留时间 t 呈指数函数关系(R=Ae^(B,t),A、B为常数,B<0),其表面去除负荷 P_S 则与 t 呈幂函数关系(P_S=At^B,B<0);(3)试验证明水蕹菜是生物净化含银废水的优良品种之一。展开更多
Momordica charantia and Ipomoea aquatica leaves are two green leafy vegetables in Bangladesh that are commonly consumed considering their characteristic taste and abundant availability in nature.The aim of this study ...Momordica charantia and Ipomoea aquatica leaves are two green leafy vegetables in Bangladesh that are commonly consumed considering their characteristic taste and abundant availability in nature.The aim of this study was to determine the available bioactive phenolic constituents as well as total flavonoid content(TFC),tannin content(TTC),phenolic content(TPC),antioxidant activity(TAA)and DPPH radical scavenging activity(IC_(50))of the ethanolic extracts of M.charantia(MCE)and I.aquatica(IAE).HPLC-DAD and UV-visible spectrophotometer were used to determine the phenolic compounds and antioxidant properties,respectively.In this study,TFC,TTC,TPC,TAA and IC_(50) values were in the order of IAE(40.73±1.0 mg QE/g)>MCE(34.60±0.46 mg QE/g);MCE(40.93±0.70 mg TAE/g)>IAE(31.13±0.42 mg TAE/g);MCE(27.76±0.58 mg GAE/g)>IAE(21.29±0.43 mg GAE/g);MCE(52.03±0.21 mg AAE/g)>IAE(40.77±0.15 mg AAE/g)and MCE(333.22±67.37μg/mL)>IAE(560.74±10.25μg/mL).M.charantia ethanolic extracts contained five hydroxycinnamic acid:ferulic acid,chlorogenic acid,p-coumaric acid,rosmarinic acid and cinnamic acid;five flavonoids:epicatechin,quercetin,catechin,rutin hydrate and myricetin;two hydroxybenzoic acid:gallic acid and vanillic acid;and one phenolic aldehyde:vanillin.Whereas,I.aquatica extracts possessed four hydroxycinnamic acid:chlorogenic acid,p-coumaric acid,trans-ferulic acid and trans-cinnamic acid;four flavonoids:epicatechin,quercetin,catechin,and rutin hydrate;two hydroxybenzoic acid:gallic acid and vanillic acid;and one phenolic aldehyde:vanillin.These underutilised sources of leafy vegetables may be used to develop functional foods by emphasising their remarkable bioactive components.展开更多
基金Supported by the Fund of Tianjin Key Laboratory of Animal and Plant Resistance in Tianjin Normal University(No.52XS1209)Transformation and Extension Program of Agricultural Science and Technology Achievements in Tianjin City(No.201001040)Doctoral Fund of Tianjin Normal University(No.52LX30)
文摘[Objective]This paper was to research the water purification mechanism of Ipomoea aquatica and its correlation with algae and rotifer. [Methods]Taking I. aquatica as the test material,Chlorella vulgaris,Scenedesmus obliquus,Microcystis aeroginosa and rotifer Adineta vaga with different densities were added to the hydroponics nutrients solutions of I. aquatica by the hydroponic ecological simulation method. The growth characteristics of I. aquatica,changes of microbial populations and the consumption status of nutrients in the nutritional solution were determined. And the interactions between the plant and the microbial populations were researched. [Results]When I. aquatica seedlings grew to a certain stage,growth of principal root stopped; while the lateral roots emerged greatly; and the nutrition absorption efficiency enhanced. As the inoculation concentration of C. vulgaris increased,root length of I. aquatica increased relatively great due to the competition for nutrients. The competition and allelopathy of M. aeroginosa and S. obliquus restricted the development of root system of I. aquatica. The grazing pressure of Chlorella vulgaris had little effects on M. aeroginosa,but restricted the rapid growth of S. obliquus. [Conclusions]This research provided data support for the application of fish-shrimp-vegetable aquaculture system.
文摘本文通过对水蕹菜净化含银废水的室内外静、动态试验研究得出:(1)水蕹菜对离子态银(Ag^+)的去除速率高于对络合态银[Ag(S_2O_3)_2]^(3-)的去除速率即 K_(Ag)+>K[Ag(S_2O_3)_2]^(3-);(2)水蕹菜对银的净化率 R 与污水停留时间 t 呈指数函数关系(R=Ae^(B,t),A、B为常数,B<0),其表面去除负荷 P_S 则与 t 呈幂函数关系(P_S=At^B,B<0);(3)试验证明水蕹菜是生物净化含银废水的优良品种之一。
基金the support of Bangabandhu Fellowship on Science and ICT,Ministry of Science and Technology,Bangladesh.
文摘Momordica charantia and Ipomoea aquatica leaves are two green leafy vegetables in Bangladesh that are commonly consumed considering their characteristic taste and abundant availability in nature.The aim of this study was to determine the available bioactive phenolic constituents as well as total flavonoid content(TFC),tannin content(TTC),phenolic content(TPC),antioxidant activity(TAA)and DPPH radical scavenging activity(IC_(50))of the ethanolic extracts of M.charantia(MCE)and I.aquatica(IAE).HPLC-DAD and UV-visible spectrophotometer were used to determine the phenolic compounds and antioxidant properties,respectively.In this study,TFC,TTC,TPC,TAA and IC_(50) values were in the order of IAE(40.73±1.0 mg QE/g)>MCE(34.60±0.46 mg QE/g);MCE(40.93±0.70 mg TAE/g)>IAE(31.13±0.42 mg TAE/g);MCE(27.76±0.58 mg GAE/g)>IAE(21.29±0.43 mg GAE/g);MCE(52.03±0.21 mg AAE/g)>IAE(40.77±0.15 mg AAE/g)and MCE(333.22±67.37μg/mL)>IAE(560.74±10.25μg/mL).M.charantia ethanolic extracts contained five hydroxycinnamic acid:ferulic acid,chlorogenic acid,p-coumaric acid,rosmarinic acid and cinnamic acid;five flavonoids:epicatechin,quercetin,catechin,rutin hydrate and myricetin;two hydroxybenzoic acid:gallic acid and vanillic acid;and one phenolic aldehyde:vanillin.Whereas,I.aquatica extracts possessed four hydroxycinnamic acid:chlorogenic acid,p-coumaric acid,trans-ferulic acid and trans-cinnamic acid;four flavonoids:epicatechin,quercetin,catechin,and rutin hydrate;two hydroxybenzoic acid:gallic acid and vanillic acid;and one phenolic aldehyde:vanillin.These underutilised sources of leafy vegetables may be used to develop functional foods by emphasising their remarkable bioactive components.
