2-μm emission performance of Tm~(3+)-Ho~(3+) co-doped tellurite glasses

The emission properties of 2-μm region fluorescence of Tm~(3+)-Ho~(3+) co-doped tellurite glasses are investigated. Introducing F~- ions to the composition of tellurite glasses plays a positive effect on the 2-μm emission.A maximum intensity of 2-μm emission is achieved when 1.5-mol%Tm_2O_3 and l-mol% Ho_2_O3 concentration are doped in the glasses.The emission cross section and gain coefficient of the ~5I_8→~5I_7 transition of Ho~(3+) are calculated.The emission cross section has a maximum of 1.29×10~(-2...     

南瓜多糖的测定及南瓜多糖与口感性状相关性的研究

用苯酚-硫酸法测定了96个南瓜品种中多糖的含量,品尝了各种南瓜的口感特征,研究了南瓜的口感特征和多糖含量的相关性.结果显示,不同品种的南瓜中南瓜多糖含量有较大差别,南瓜多糖的含量和南瓜口感的面度存在显著性正相关.测定结果为南瓜新品种的培育与南瓜新产品的开发提供了重要的科学依据.     

多维元素泡腾片的研制

以多维元素为原料,加入甘露醇、甜菊糖甙、柠檬酸和碳酸氢钠等辅料,采用湿法制粒压片,制备多维元素泡腾片,通过筛选处方和优化工艺,确定了产品的制作工艺条件及配方。结果表明,该工艺与配方为:按占片质量的比例计,甘露醇填充剂66%,柠檬酸11.3%、碳酸氢钠8.7%作崩解剂,甜菊糖甙2%、粉末香精为矫味剂0.5%、聚乙二醇6000为润滑剂2%。制备的多维元素泡腾片崩解迅速、口感良好、服用方便。