全北国立大学(JEONBUK NATIONAL UNIVERSITY)在《Frontiers in Plant Science》发表了题为“Monitoring of Salinity, Temperature, and Drought Stress in Grafted Watermelon Seedlings Using Chlorophyll Fluorescence” 1的文章,这是近期Yu Kyeong Shin2研究团队利用易科泰FluorCam开放式叶绿素荧光成像系统发表的第二篇非生物胁迫相关的文章。本次研究主要是将韩国传统西瓜品种‘Seo Tae Ja’嫁接到耐高温西瓜品种‘Seol Jung Mae’上,采用单子叶嫁接的方法并培养至三叶期,试验监测和探讨了嫁接西瓜幼苗面对盐度、温度和干旱胁迫影响时的生理状态。
The degree of substitution for sulfobutyl ether b-cyclodextrin (SBE-b-CD) has historically been characterized by nuclear magnetic resonance spectroscopy, but this approach provides gross values for the degree of substitution. The capillary electrophoresis method described here resolves the mixture of positional and regional isomers based on the degree of sulfo butyl ether substitution. Indirect UV detection has been used, where the detection of cyclodextrin is accomplished by a decrease in background absorbance of the background electrolyte buffer benzoic acid. Ten peaks of SBE-b-CD were well resolved with an optimum pH of 8.0 using an Agilent 50 μm id, 56 cm length bare fused silica capillary. The system suitability requirements were passed as per United States Pharmacopeia (USP), and acceptence criteria for averge degree of substitution 6.2 to 6.9 were met.
玻璃通常按主要成分分为氧化物玻璃和非氧化物玻璃。非氧化物玻璃分为硫系玻璃(阴离子多为硫、硒、碲等)和卤化物玻璃;氧化物玻璃分为硅酸盐玻璃、硼酸盐玻璃、磷酸盐玻璃等。 X 荧光光谱仪对玻璃行业的进厂原料、玻璃成品的元素组成成份具有很好的分析效果。这里以 WDX 系列 X 荧光光谱仪对玻 璃行业进厂原料(石灰石、白云石)及玻璃成品的重复性测试为例,介绍玻璃行业的应用解决方案。