[Objective] The aim of this study was to investigate the decolorization ef- fects of activated carbon and macroporous resin on Periplaneta americana L. skimmed cream and compare the advantages and disadvantages of the...[Objective] The aim of this study was to investigate the decolorization ef- fects of activated carbon and macroporous resin on Periplaneta americana L. skimmed cream and compare the advantages and disadvantages of the two decolorization technologies. [Method] Periplaneta americana L. skimmed cream was decolored with activated carbon and macroporous resin, and freeze-dried to collect solid decolorization products. By investigating the yield, decolorization rate, protein retention rate and decolorization operation process, the advantages and disadvantages of the two decolorization technologies were compared. [Result] Both activated carbon and macroporous resin can be used for decolorization. To be specific, macroporous resin-decolorization is superior in the yield and protein retention rate, while activated carbon-decolorization is superior in decolorization rate and decolorization operation process. [Conclusion] Macroporous resin-decolorization can be used if protein is the main ingredient required in the experiment, while activated carbon-decolorization can be used if protein is not the main ingredient required.展开更多
报道了不同诱导源处理美洲大蠊(Periplaneta americana L.)后对抗菌物质的诱导结果。结果表明,不同诱导源均可诱导抗菌物质的产生,但抗菌活性有差异。在供试诱导源中,大肠杆菌(Escherichiacoli K88)所诱导产生的抗菌活性最强,其次为溴...报道了不同诱导源处理美洲大蠊(Periplaneta americana L.)后对抗菌物质的诱导结果。结果表明,不同诱导源均可诱导抗菌物质的产生,但抗菌活性有差异。在供试诱导源中,大肠杆菌(Escherichiacoli K88)所诱导产生的抗菌活性最强,其次为溴氰菊酯。日龄10d以内的成虫诱导后的24h即表现抗菌活性,其中,10日龄以内的雄成虫抗菌活性比例以及诱导后的存活率最高。展开更多
目的研究美洲大蠊Periplaneta americana L.的化学成分及其抗氧化活性。方法美洲大蠊95%乙醇提取物采用硅胶、Sephadex LH-20、制备HPLC进行分离纯化,根据理化性质及波谱数据鉴定所得化合物的结构。DPPH法测定其抗氧化活性。结果从中分...目的研究美洲大蠊Periplaneta americana L.的化学成分及其抗氧化活性。方法美洲大蠊95%乙醇提取物采用硅胶、Sephadex LH-20、制备HPLC进行分离纯化,根据理化性质及波谱数据鉴定所得化合物的结构。DPPH法测定其抗氧化活性。结果从中分离得到14个化合物,分别鉴定为4-羟基苯乙基乙酸酯(1)、阿魏酸乙酯(2)、3,4-二甲氧基苯乙酮(3)、ethyl p-hydroxyphenyllactate(4)、(3R,4S)-6,8-dihydroxy-3,4,5,7-tetramethylisochroman(5)、(S)-3-(3′,5′-dihydroxy-2′,4′-methylphenyl)butan-2-one(6)、邻苯二甲酸二(2-乙基己基)酯(7)、5-羟甲基糠醛(8)、(E,E)-十六烷基-7,10-二烯-1-醇(9)、(Z,Z)-5,8-十四碳二烯酸(10)、(Z,Z,Z)-5,8,11-十四碳三烯酸(11)、(Z,Z)-3,6-十二碳二烯酸(12)、(E)-2′,3′-二羟丙基十八烷基-9-烯酸酯(13)、1-O-(9Z,12Z,15Z-十八碳三烯酸酯)甘油(14)。化合物4、13~14的IC_(50)值分别为(9.6±0.24)、(23.2±0.36)、(20.4±1.47)μg/mL。结论化合物1~6、10~14为首次从该属植物中分离得到。化合物4、13~14具有抗氧化活性。展开更多
基金Supported by National Natural Science Foundation of China(30560181)~~
文摘[Objective] The aim of this study was to investigate the decolorization ef- fects of activated carbon and macroporous resin on Periplaneta americana L. skimmed cream and compare the advantages and disadvantages of the two decolorization technologies. [Method] Periplaneta americana L. skimmed cream was decolored with activated carbon and macroporous resin, and freeze-dried to collect solid decolorization products. By investigating the yield, decolorization rate, protein retention rate and decolorization operation process, the advantages and disadvantages of the two decolorization technologies were compared. [Result] Both activated carbon and macroporous resin can be used for decolorization. To be specific, macroporous resin-decolorization is superior in the yield and protein retention rate, while activated carbon-decolorization is superior in decolorization rate and decolorization operation process. [Conclusion] Macroporous resin-decolorization can be used if protein is the main ingredient required in the experiment, while activated carbon-decolorization can be used if protein is not the main ingredient required.
文摘报道了不同诱导源处理美洲大蠊(Periplaneta americana L.)后对抗菌物质的诱导结果。结果表明,不同诱导源均可诱导抗菌物质的产生,但抗菌活性有差异。在供试诱导源中,大肠杆菌(Escherichiacoli K88)所诱导产生的抗菌活性最强,其次为溴氰菊酯。日龄10d以内的成虫诱导后的24h即表现抗菌活性,其中,10日龄以内的雄成虫抗菌活性比例以及诱导后的存活率最高。
文摘目的研究美洲大蠊Periplaneta americana L.的化学成分及其抗氧化活性。方法美洲大蠊95%乙醇提取物采用硅胶、Sephadex LH-20、制备HPLC进行分离纯化,根据理化性质及波谱数据鉴定所得化合物的结构。DPPH法测定其抗氧化活性。结果从中分离得到14个化合物,分别鉴定为4-羟基苯乙基乙酸酯(1)、阿魏酸乙酯(2)、3,4-二甲氧基苯乙酮(3)、ethyl p-hydroxyphenyllactate(4)、(3R,4S)-6,8-dihydroxy-3,4,5,7-tetramethylisochroman(5)、(S)-3-(3′,5′-dihydroxy-2′,4′-methylphenyl)butan-2-one(6)、邻苯二甲酸二(2-乙基己基)酯(7)、5-羟甲基糠醛(8)、(E,E)-十六烷基-7,10-二烯-1-醇(9)、(Z,Z)-5,8-十四碳二烯酸(10)、(Z,Z,Z)-5,8,11-十四碳三烯酸(11)、(Z,Z)-3,6-十二碳二烯酸(12)、(E)-2′,3′-二羟丙基十八烷基-9-烯酸酯(13)、1-O-(9Z,12Z,15Z-十八碳三烯酸酯)甘油(14)。化合物4、13~14的IC_(50)值分别为(9.6±0.24)、(23.2±0.36)、(20.4±1.47)μg/mL。结论化合物1~6、10~14为首次从该属植物中分离得到。化合物4、13~14具有抗氧化活性。
