A novel raspberry shaped iron cobalt oxide nanomaterial(R-CoFe2O4-ONMs)was synthesized using a soft template method and direct water bath heating with the help of surfactant sodium dodecyl sulfate(SDS).We studied the ultra sensitive detection of ofloxacin(OFL)and cip-rofloxacin(CIP)in aqueous solutions using R-CoFe2O4-ONMs fluorescence detection.The results showed that the detection limits(LOD)for OFL and CIP antibiotics were 35.78 and 33.47 ng/mL,respectively.Study the effects of pH value,iron cobalt molar ratio,and initial material quality on the fluorescence detection performance of R-CoFe2O4-ONMs.At the same time,the quenching mechanism was also discussed,provi-ding factual basis for the subsequent fluorescence detection of antibiotics in other materials.R-CoFe2O4-ONMs,as a fluorescent sensor with good selectivity,anti-interference and cycling properties,are expected to have good application prospects in the detection of quinolone antibiotics.
"化工原理实验"是酿酒工程专业的一门重要的专业基础课程.通过该课程的学习,学生受到系统、严格的工程实践训练,提高了动手能力、分析和解决复杂问题的能力.为了提高酿酒工程专业"化工原理实验"的教学效果,开展了对本课程教学情况的问卷调查,并基于本次调查研究,提出了相应的教学改进措施.
The integration of innovation and entrepreneurship education and the core curriculum of pharmaceutical engineering is a challenge facing the Industry 4.0 era and the new engineering background. In this paper, the case teaching of pharmaceutical equipment and workshop design is combined with the education of innovation and entrepreneurship, the case teaching system of pharmaceutical workshop is established in the form of case teaching, which is supported by digital information technology and integrated with innovation and entrepreneurship education. To realize the educational goal of “Trinity” of innovative and enterprising thinking and spirit shaping, ability training and knowledge imparting, and to train high-quality and compound technical talents with strong innovative and enterprising consciousness and innovation as the core, to achieve all-round education.
分析了影响富油竹叶糕中亚硝酸盐含量测定的各种影响要素,包括样品称量、标准溶液稀释过程、标准曲线拟合和测量结果重复性等,并进行了定量评定.方法测量的合成不确定度和扩展不确定度分别为 0.0544、0.0762 mg/kg.测量富油竹叶糕中亚硝酸盐含量的结果为(0.70±0.0762)mg/kg(k =2,置信区间95%).
人教版普通高中化学教材(2019)在2004 版的基础上有了较大的升级和改动,新教材落实新课标理念,在旧教材"实验X-X"栏目的基础上,在章末增设了"实验活动"栏目.旨在通过开展实验活动创设教学情境,锻炼学生的实际操作能力,在实验过程中逐渐掌握化学实验方法.化学教材是化学教师教学的重要参考和指导,也是学生学习化学的宝贵资源,"实验活动"栏目的设置具有重要作用,教师要深入研究和发掘其教学意义,正确利用教材栏目进行教学、充分发挥出它的功能.
