【摘 要】
：
The method based on solvent parameters (mass,cycle of acidification,and autodeposition time),combined with response surface methodology (RSM) modeling and optim
【机 构】
：
Physics Department, Faculty of Science and Letters, Manisa Celal Bayar University, 45140 Manisa, Tur
论文部分内容阅读
The method based on solvent parameters (mass,cycle of acidification,and autodeposition time),combined with response surface methodology (RSM) modeling and optimization,has been developed for maximizing 210poactivity in tea samples,as observed by an alpha spectrometer.RSM based on 3-factor and 5-level composite center design was used to obtain the optimal combination of solvent conditions.As solvent parameters for 210po activity,different masses (0.5,0.75,1,1.5,and 2 g),different cycles of acidification (2,3,4,5,and 6 times),and different autodeposition times (2,3,4,5,and 6 h) were studied.The 3D response surface plot and the contour plot derived from the mathematical models were used to determine the optimal conditions.According to the obtained results,the experimental value of 210Po activity was in good agreement (R2=0.96) with the value predicted by the model.We found a favorable effect of mass on the 210Po activity (p＜0.05).
其他文献
教育部近日举行的新闻发布会，就近日国务院办公厅印发的《对省级人民政府履行教育职责的评价办法》（以下简称《办法》）进行了详细解读。新出台的《办法》旨在明确评价目标、规范评价流程，加强考核问责，推动省级人民政府依法全面正确履行教育职责，确保国家教育方针政策的贯彻执行。 6个方面40余条内容 教育部教育督导局局长、国务院教育督导委员会办公室主任何秀超介绍，《办法》共分为5章、16条，包括总则、评价的
Existing standards show a clear discrepancy in the specification of the maximum proton energy for qualified ground-based evaluation of single-event effects,whic
目的:分析和探讨营养不良患儿中应用健康保健方法 干预的临床效果.方法:研究时间:2019年5月至2019年12月,对象:我院儿童保健科诊治的40例营养不良患儿,选取分组方式:根据患儿
目的:研究阿立哌唑和利培酮分别治疗首发精神分裂症的临床效果.方法:选取2017年1月～2019年3月在我院治疗的64例首发精神分裂症患者作为研究对象,将他们随机均分为两组,即观察
本刊讯人力资源和社会保障部、教育部联合印发通知，就做好2017年度中小学教师职称评审工作作出部署。通知指出，要注重考察教师教书育人的工作业绩和实际贡献，探索用教学成果替代论文要求；完善正高级教师评价标准，让更多优秀教师“跳一跳能够得着”；推动部属高校附属中小学教师职称改革入轨。 通知要求，要坚持把师德放在中小学教师评价的首位，通过个人述职、考核测评、征求学生和家长意见等方式全面考察教师的职业操守
目的:探讨全程营养管理对肿瘤患者化疗前后营养变化的影响.方法:选取我院(2017年1月～2019年1月)收治的100例恶性肿瘤患者,根据不同营养支持分为2组,对照组(n=50)接受常规营养
A multichannel low-noise electronic prototype system was designed for a pixelated CdZnTe detector.This system is the result of preliminary work on a solar hard
Stochastic point kinetics equations (SPKEs) are a system of It(o) stochastic differential equations whose solution has been obtained by higher-order approximati
教育部近日发布《2017年上半年中小学有偿补课治理专项调研与督查情况》指出,以考试成绩、升学率作为评价学校重要指标的狭隘政绩观,造成学校应试教育倾向、校际间分数攀比和
Recovery algorithms play a key role in compressive sampling (CS).Most of current CS recovery algo-rithms are originally designed for one-dimensional (1D) signal