Changes of various mineral elements (P, K, Ca, Mg, Fe, Mn, Zn and Na) contents in roots and leaves of S. sagittifolia were studied with treatment of different Cu2+ concentrations (5 μM, 10 μM, 20 μM and 40 μM) aft...Changes of various mineral elements (P, K, Ca, Mg, Fe, Mn, Zn and Na) contents in roots and leaves of S. sagittifolia were studied with treatment of different Cu2+ concentrations (5 μM, 10 μM, 20 μM and 40 μM) after 15 days. The results showed that: 1) Cu accumulated in roots of S. sagittifolia in large quantities, while Cu content in leaves showed no significant change;2) It can be seen from the changes of macroelements that Cu2+ treatments had inhibited the absorption of P, K, Ca, Mg in roots of S. sagittifolia, but the contents of P, K and Mg in leaves were higher than those in the roots in all Cu2+ treatment groups;3) It can be seen from the changes of microelements that Cu2+ treatment promoted the absorption of Fe, inhibited absorption of Mn, Zn and Na in roots of S. sagittifolia, and hindered the transport of various micro-elements from roots to leaves. In all the Cu2+ treatment groups, contents of Fe, Mn, Zn and Na in leaves were lower than those in the roots;4) The critical concentration of Cu2+ to S. sagittifolia was 5 μM. It could be seen from the above results that exogenous added Cu2+ of different concentrations broke the balance of various mineral elements in S. sagittifolia, which would exert a significant impact on numerous metabolic pathways and physiological processes.展开更多
[Objectives] To develop a kind of antioxidant health drink which could also regulate blood sugar.[Methods]With Sagittaria sagittifolia,hawthorn and liquorice as raw materials,the orthogonal test was done to determine ...[Objectives] To develop a kind of antioxidant health drink which could also regulate blood sugar.[Methods]With Sagittaria sagittifolia,hawthorn and liquorice as raw materials,the orthogonal test was done to determine the optimum preparation ratio of each raw material,optimum flavor modulation ratio and optimum stabilizer type and amount.[Results]Under the conditions of 0. 4% crude polysaccharide powder amount of Sagittaria sagittifolia,10. 0 m L hawthorn extract,2. 5 m L liquorice extract,7. 0% white sugar amount,0. 5% citric acid amount,0. 2% cyclodextrine amount,0. 05 g/L sodium alginate amount,0. 5 g/L xanthan gum amount,2. 0 g/L agar amount and 20 MPa homogenization,the beverage had optimum flavor and stability.[Conclusions]The health drink obtained under these technological conditions had delicate sweet taste and rich nutrition.展开更多
为调查我国主要产区慈姑中重金属污染状况,及时发现质量安全隐患,科学防控水生蔬菜重金属风险,2019—2021年在我国慈姑主产区湖北省、江苏省、浙江省和广西壮族自治区的生产基地连续采集175批次样品,监测7种重金属含量,并采用食品安全指...为调查我国主要产区慈姑中重金属污染状况,及时发现质量安全隐患,科学防控水生蔬菜重金属风险,2019—2021年在我国慈姑主产区湖北省、江苏省、浙江省和广西壮族自治区的生产基地连续采集175批次样品,监测7种重金属含量,并采用食品安全指数(index of food safety,IFS)法进行膳食暴露风险评估。结果表明,慈姑样品中重金属总体合格率为98.3%;铜、砷和镉的检出率均达100.0%,铬、铅、镍和汞的检出率分别为78.8%、69.7%、36.6%和20.0%。其中,砷和镉的超标率分别为1.1%和0.6%,2批次砷超标样品和1批次镉超标样品分别来自江苏省、湖北省和广西壮族自治区。从食品安全指数评价结果来看,慈姑中7种重金属的IFS和IFS都远小于1,整体暴露风险处于可接受范围。展开更多
文摘Changes of various mineral elements (P, K, Ca, Mg, Fe, Mn, Zn and Na) contents in roots and leaves of S. sagittifolia were studied with treatment of different Cu2+ concentrations (5 μM, 10 μM, 20 μM and 40 μM) after 15 days. The results showed that: 1) Cu accumulated in roots of S. sagittifolia in large quantities, while Cu content in leaves showed no significant change;2) It can be seen from the changes of macroelements that Cu2+ treatments had inhibited the absorption of P, K, Ca, Mg in roots of S. sagittifolia, but the contents of P, K and Mg in leaves were higher than those in the roots in all Cu2+ treatment groups;3) It can be seen from the changes of microelements that Cu2+ treatment promoted the absorption of Fe, inhibited absorption of Mn, Zn and Na in roots of S. sagittifolia, and hindered the transport of various micro-elements from roots to leaves. In all the Cu2+ treatment groups, contents of Fe, Mn, Zn and Na in leaves were lower than those in the roots;4) The critical concentration of Cu2+ to S. sagittifolia was 5 μM. It could be seen from the above results that exogenous added Cu2+ of different concentrations broke the balance of various mineral elements in S. sagittifolia, which would exert a significant impact on numerous metabolic pathways and physiological processes.
基金Supported by Research Project of Sichuan Provincial Department of Education
文摘[Objectives] To develop a kind of antioxidant health drink which could also regulate blood sugar.[Methods]With Sagittaria sagittifolia,hawthorn and liquorice as raw materials,the orthogonal test was done to determine the optimum preparation ratio of each raw material,optimum flavor modulation ratio and optimum stabilizer type and amount.[Results]Under the conditions of 0. 4% crude polysaccharide powder amount of Sagittaria sagittifolia,10. 0 m L hawthorn extract,2. 5 m L liquorice extract,7. 0% white sugar amount,0. 5% citric acid amount,0. 2% cyclodextrine amount,0. 05 g/L sodium alginate amount,0. 5 g/L xanthan gum amount,2. 0 g/L agar amount and 20 MPa homogenization,the beverage had optimum flavor and stability.[Conclusions]The health drink obtained under these technological conditions had delicate sweet taste and rich nutrition.
文摘为调查我国主要产区慈姑中重金属污染状况,及时发现质量安全隐患,科学防控水生蔬菜重金属风险,2019—2021年在我国慈姑主产区湖北省、江苏省、浙江省和广西壮族自治区的生产基地连续采集175批次样品,监测7种重金属含量,并采用食品安全指数(index of food safety,IFS)法进行膳食暴露风险评估。结果表明,慈姑样品中重金属总体合格率为98.3%;铜、砷和镉的检出率均达100.0%,铬、铅、镍和汞的检出率分别为78.8%、69.7%、36.6%和20.0%。其中,砷和镉的超标率分别为1.1%和0.6%,2批次砷超标样品和1批次镉超标样品分别来自江苏省、湖北省和广西壮族自治区。从食品安全指数评价结果来看,慈姑中7种重金属的IFS和IFS都远小于1,整体暴露风险处于可接受范围。
