Generation of a cavity-enhanced nondegenerate narrow-band photon pair source is a potential way to realize a perfect photonic quantum interface for a hybrid quantum network. However, to ensure the high quality of the ...Generation of a cavity-enhanced nondegenerate narrow-band photon pair source is a potential way to realize a perfect photonic quantum interface for a hybrid quantum network. However, to ensure the high quality of the photon source, the pump laser for the narrow-band photon source should be generated in a special way. Here, we experimentally generate the blue 453 nm laser with a sum frequency generation process in a periodically poled lithium niobate waveguide. A 13 mW laser at 453 nm can be achieved with a low-power 880 nm laser and 935 nm laser input, and the internal conversion efficiency is 21.6% after calculation. The frequency of a 453 nm laser is stabilized by locking two pump lasers on one ultrastable optical cavity. The single pass process without employ- ing cavity enhancement can ensure a good robustness of the whole system.展开更多
本文以新鲜赛买提杏片为对照组(CK),探究热水漂烫(Hot Water Blanching,HWB)、高压静电场(High-voltage Electric Field,HEF)和常压射流等离子体(Atmospheric Pressure Plasma Jet,APPJ)3种预处理方式对杏片热泵干燥特性、水分组成、微...本文以新鲜赛买提杏片为对照组(CK),探究热水漂烫(Hot Water Blanching,HWB)、高压静电场(High-voltage Electric Field,HEF)和常压射流等离子体(Atmospheric Pressure Plasma Jet,APPJ)3种预处理方式对杏片热泵干燥特性、水分组成、微观结构和物理化学特性的影响。结果表明:HEF预处理与CK组在干燥速率和品质特性上无显著差异;APPJ处理后的干燥时间最短,为22 h,分别比CK、HWB和HEF处理缩短了35.29%、17.65%和35.29%;CK和HEF预处理的最佳数学拟合模型为Wang and Singh,HWB和APPJ预处理的最佳数学拟合模型为Page;相较于CK,HWB与APPJ预处理均能破坏细胞壁及中胶层结构,其中APPJ处理组细胞壁孔隙度显著增加,水分迁移阻力显著降低(P<0.05)。果胶组分分析进一步证实,APPJ预处理通过增加水溶性果胶(WSP)含量,降低螯合果胶(CSP)和碱溶性果胶(NSP)含量,明显改变细胞壁的机械强度和孔隙率;在抗氧化特性方面,HWB与APPJ预处理均显著提高DPPH自由基清除率及FRAP值,其中APPJ组表现尤为突出,其总酚(176.40±8.19 mg/kg)及类胡萝卜素(32.64±0.83 mg/kg)保留率显著优于其他处理组,且硬度、多酚氧化酶(PPO)和过氧化物酶(POD)活性则显著降低(P<0.05),有效抑制了酶促褐变,保持了杏片的鲜亮色泽。综上所述,APPJ预处理通过破坏细胞结构、改变果胶组分、抑制酶促褐变及保护抗氧化活性物质,显著提高了杏片的干燥效率和品质特性,是一种高效、绿色的预处理方法,具有广阔的应用前景。展开更多
基金supported by the National Key Research and Development Program of China(No.2017YFA0304100)the National Natural Science Foundation of China(Nos.61327901,11325419,and11474268)+2 种基金the Key Research Program of Frontier Sciences,CAS(No.QYZDY-SSW-SLH003)the National Program for Support of Topnotch Young Professionals(No.BB2470000005)the Fundamental Research Funds for the Central Universities(Nos.WK2470000026and WK2470000018)
文摘Generation of a cavity-enhanced nondegenerate narrow-band photon pair source is a potential way to realize a perfect photonic quantum interface for a hybrid quantum network. However, to ensure the high quality of the photon source, the pump laser for the narrow-band photon source should be generated in a special way. Here, we experimentally generate the blue 453 nm laser with a sum frequency generation process in a periodically poled lithium niobate waveguide. A 13 mW laser at 453 nm can be achieved with a low-power 880 nm laser and 935 nm laser input, and the internal conversion efficiency is 21.6% after calculation. The frequency of a 453 nm laser is stabilized by locking two pump lasers on one ultrastable optical cavity. The single pass process without employ- ing cavity enhancement can ensure a good robustness of the whole system.
文摘本文以新鲜赛买提杏片为对照组(CK),探究热水漂烫(Hot Water Blanching,HWB)、高压静电场(High-voltage Electric Field,HEF)和常压射流等离子体(Atmospheric Pressure Plasma Jet,APPJ)3种预处理方式对杏片热泵干燥特性、水分组成、微观结构和物理化学特性的影响。结果表明:HEF预处理与CK组在干燥速率和品质特性上无显著差异;APPJ处理后的干燥时间最短,为22 h,分别比CK、HWB和HEF处理缩短了35.29%、17.65%和35.29%;CK和HEF预处理的最佳数学拟合模型为Wang and Singh,HWB和APPJ预处理的最佳数学拟合模型为Page;相较于CK,HWB与APPJ预处理均能破坏细胞壁及中胶层结构,其中APPJ处理组细胞壁孔隙度显著增加,水分迁移阻力显著降低(P<0.05)。果胶组分分析进一步证实,APPJ预处理通过增加水溶性果胶(WSP)含量,降低螯合果胶(CSP)和碱溶性果胶(NSP)含量,明显改变细胞壁的机械强度和孔隙率;在抗氧化特性方面,HWB与APPJ预处理均显著提高DPPH自由基清除率及FRAP值,其中APPJ组表现尤为突出,其总酚(176.40±8.19 mg/kg)及类胡萝卜素(32.64±0.83 mg/kg)保留率显著优于其他处理组,且硬度、多酚氧化酶(PPO)和过氧化物酶(POD)活性则显著降低(P<0.05),有效抑制了酶促褐变,保持了杏片的鲜亮色泽。综上所述,APPJ预处理通过破坏细胞结构、改变果胶组分、抑制酶促褐变及保护抗氧化活性物质,显著提高了杏片的干燥效率和品质特性,是一种高效、绿色的预处理方法,具有广阔的应用前景。
