In this study, a high performance liquid chromatographic method was established to determine the content of phosphatidylcholine in Zophobas morio L. The samples were extracted with methyl alcohol, pttrified, analyzed ...In this study, a high performance liquid chromatographic method was established to determine the content of phosphatidylcholine in Zophobas morio L. The samples were extracted with methyl alcohol, pttrified, analyzed by high performance liquid chromatography, and quantified with external standard method. The results showed a good linear correlation within the concentration range of 250 - 2 000 μg/ml, and the correlation coefficient was 0. 999 6. The standard recovery rate ranged from 97% to 109%, and the relative standard deviation was lower than 2.4%. Furthermore, phosphatidylcholine contents ~f Z. mor/o individuals at different growth stages were determined. According to the results, the variation pattern of phosphatidylcholine contents of Z. mor/o with individual weight was consistent with the binomial curve, and the correlation coefficient was R^2=0. 865 （P 〈0.01 ）. This study laid methodological foundation for the development of Z. mor/o functional products.展开更多
Currently,there is an imperative demand for developing a novel flexible heater with high adhesion,breathability,and extreme condition resistance,such as ultra-high temperatures and even fire.Herein,a high-adhesion,fla...Currently,there is an imperative demand for developing a novel flexible heater with high adhesion,breathability,and extreme condition resistance,such as ultra-high temperatures and even fire.Herein,a high-adhesion,flame-retardancy,and anti-bacteria copper nanoparticles networks/nylon 6 woven fabric(CNNs/NWF)wearable heater with a“sandwich-like”structure has been designed and fabricated based on phatic acid/aminopropyltriethoxysilane(PA/APTES)hybrid coating.On the one hand,the CNNs/NWF wearable heater exhibited superb electrothermal behavior working at a peak temperature of 208.8℃powered with 2.0 V,better than that of wearable heaters in the recently reported literature.On the other hand,the vertical burning test showed that the heater possesses splendid flame retardancy.Furthermore,the PA/APTES coating could deposit a nanoscale porous protective film on the surface of CNNs/NWF,which imparts the heater with relatively excellent oxidation resistance and breathability.In addition,the antibacterial efficiency against Escherichia coli(E.coli)and Staphylococcus aureus(S.aureus)still reached100%after 50 times of standard washing and being electrified at 2.0 V for 5 min,keeping humans away from the threat of bacterial infections.We think that the heater in this research could be extended to wearable heating devices.展开更多
基金Supported by National Key Technology R&D Program for the 12thFive-year Plan of China(2011-2015)(2011BAD26B040406)
文摘In this study, a high performance liquid chromatographic method was established to determine the content of phosphatidylcholine in Zophobas morio L. The samples were extracted with methyl alcohol, pttrified, analyzed by high performance liquid chromatography, and quantified with external standard method. The results showed a good linear correlation within the concentration range of 250 - 2 000 μg/ml, and the correlation coefficient was 0. 999 6. The standard recovery rate ranged from 97% to 109%, and the relative standard deviation was lower than 2.4%. Furthermore, phosphatidylcholine contents ~f Z. mor/o individuals at different growth stages were determined. According to the results, the variation pattern of phosphatidylcholine contents of Z. mor/o with individual weight was consistent with the binomial curve, and the correlation coefficient was R^2=0. 865 （P 〈0.01 ）. This study laid methodological foundation for the development of Z. mor/o functional products.
基金financially supported by the National Key Research and Development Program(No.2017YFB0309400)the Technology Innovation Center of Hebei for fiber material(No.SG2020022)the National Innovation Center of Advanced Dyeing and Finishing Technology(No.ZJ2021A13)。
文摘Currently,there is an imperative demand for developing a novel flexible heater with high adhesion,breathability,and extreme condition resistance,such as ultra-high temperatures and even fire.Herein,a high-adhesion,flame-retardancy,and anti-bacteria copper nanoparticles networks/nylon 6 woven fabric(CNNs/NWF)wearable heater with a“sandwich-like”structure has been designed and fabricated based on phatic acid/aminopropyltriethoxysilane(PA/APTES)hybrid coating.On the one hand,the CNNs/NWF wearable heater exhibited superb electrothermal behavior working at a peak temperature of 208.8℃powered with 2.0 V,better than that of wearable heaters in the recently reported literature.On the other hand,the vertical burning test showed that the heater possesses splendid flame retardancy.Furthermore,the PA/APTES coating could deposit a nanoscale porous protective film on the surface of CNNs/NWF,which imparts the heater with relatively excellent oxidation resistance and breathability.In addition,the antibacterial efficiency against Escherichia coli(E.coli)and Staphylococcus aureus(S.aureus)still reached100%after 50 times of standard washing and being electrified at 2.0 V for 5 min,keeping humans away from the threat of bacterial infections.We think that the heater in this research could be extended to wearable heating devices.
