研究非浓缩还原(not from concentrate,NFC)梨汁在添加还原性谷胱甘肽、偏重亚硫酸钾、D-异抗坏血酸3种不同抗氧化剂后品质的变化。采用紫外-可见分光光度计、色度仪、电子鼻、电子舌等设备探究3种不同抗氧化剂对NFC梨汁的褐变度、色度...研究非浓缩还原(not from concentrate,NFC)梨汁在添加还原性谷胱甘肽、偏重亚硫酸钾、D-异抗坏血酸3种不同抗氧化剂后品质的变化。采用紫外-可见分光光度计、色度仪、电子鼻、电子舌等设备探究3种不同抗氧化剂对NFC梨汁的褐变度、色度、风味及滋味的影响。结果表明,添加还原性谷胱甘肽的NFC梨汁颜色改善,色泽更加金黄,褐变度最低(P<0.05);添加偏重亚硫酸钾的NFC梨汁会使金属传感器W1C、W3C、W5C(均对芳香类物质灵敏)响应值显著提高(P<0.05)。展开更多
The effects of rare earth ytterbium(Yb)addition and hot extrusion on the microstructure and corrosion behavior of as-cast ADC12 were studied by optical microscopy(OM),scanning electron microscopy(SEM),energy dispersiv...The effects of rare earth ytterbium(Yb)addition and hot extrusion on the microstructure and corrosion behavior of as-cast ADC12 were studied by optical microscopy(OM),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS)and X-ray diffraction(XRD).The experimental results demonstrate that both the Si phase andβ-Al5FeSi phase in the alloy with 0.9 wt%Yb have been remarkably refined,and the Al3Yb intermetallic compound has also been obtained.The Si,β-Al5FeSi,and rare earth phases are further refined in the alloy at 0.9 wt%Yb and hot extrusion.The results of the immersion corrosion tests and electrochemical experiments show that the corrosion current density(8.56μA/cm2)of the alloy with 0.9 wt%Yb addition and hot extrusion is 50.6%lower than the untreated alloy(17.33μA/cm2),and the polarization resistance(9252Ω·cm2)was 71.3%higher than the untreated alloy(2654Ω·cm2).The corrosion in the cathode phase in the micro-battery was refined to varying degrees attributable to the addition of Yb and hot extrusion,where the cathode reaction in the corrosion process caused a decrease of the corrosion rate.展开更多
文摘研究非浓缩还原(not from concentrate,NFC)梨汁在添加还原性谷胱甘肽、偏重亚硫酸钾、D-异抗坏血酸3种不同抗氧化剂后品质的变化。采用紫外-可见分光光度计、色度仪、电子鼻、电子舌等设备探究3种不同抗氧化剂对NFC梨汁的褐变度、色度、风味及滋味的影响。结果表明,添加还原性谷胱甘肽的NFC梨汁颜色改善,色泽更加金黄,褐变度最低(P<0.05);添加偏重亚硫酸钾的NFC梨汁会使金属传感器W1C、W3C、W5C(均对芳香类物质灵敏)响应值显著提高(P<0.05)。
基金Project(51965040)supported by the National Natural Science Foundation of ChinaProject(20181BAB206026)supported by the Natural Science Foundation of Jiangxi Province,China。
文摘The effects of rare earth ytterbium(Yb)addition and hot extrusion on the microstructure and corrosion behavior of as-cast ADC12 were studied by optical microscopy(OM),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS)and X-ray diffraction(XRD).The experimental results demonstrate that both the Si phase andβ-Al5FeSi phase in the alloy with 0.9 wt%Yb have been remarkably refined,and the Al3Yb intermetallic compound has also been obtained.The Si,β-Al5FeSi,and rare earth phases are further refined in the alloy at 0.9 wt%Yb and hot extrusion.The results of the immersion corrosion tests and electrochemical experiments show that the corrosion current density(8.56μA/cm2)of the alloy with 0.9 wt%Yb addition and hot extrusion is 50.6%lower than the untreated alloy(17.33μA/cm2),and the polarization resistance(9252Ω·cm2)was 71.3%higher than the untreated alloy(2654Ω·cm2).The corrosion in the cathode phase in the micro-battery was refined to varying degrees attributable to the addition of Yb and hot extrusion,where the cathode reaction in the corrosion process caused a decrease of the corrosion rate.
