A qualitative research: how was the objectives and principles of public health tackled in the public health coursebook by Julius Hirsch and Muhiddin Erel?

Objective:We aimed to assess the subject of"Purpose and Principles of Public Health"in the work titled"Public Health Coursebook"dated 1938,share the information we obtained and compare it with today's information.Methods:Multiple document analysis method in qualitative research was used to design the study.First of all,original edition of the Public Health Coursebook was purchased from a website with rare books.The book was thoroughly examined and the"Purpose and Principles of Hygiene(Public Health)"part in the first volume was evaluated.The information in the book was compared with today's information according to the methodology of history of medicine.Secondly,the Republic Archive Catalog of the Turkish Presidency of the Republic of Turkiye State Archives was scanned.Results:After the University Reform movement in Turkiye in 1933,the Faculty of Medicine was established at Istanbul University.In the same period,Turkiye embraced many scientists who fled abroad due to Nazi regime.One of them,Julius Hirsch,was appointed as the head of Hygiene Institute,and Turkish physician Muhiddin Erel became his assistant.The Purpose and Principles of Public Health are discussed in the first volume of the Hygiene Textbook,which they both prepared together.The book,defines public health as"the science of protecting and maintaining health".Public health has been handled with a holistic approach.The aim of measures to be taken regarding public health is explained as the prevention of untimely death,prevention of diseases and protection of the ability to work even in advanced ages.It has been specifically stated that the common goal is to protect public health and ensure the continuity of health despite the practices that vary by time,place and cultures.The documents in the State Archives are about the admission of immigrant scientists to Turkiye,Hirsch's Turkish citizenship and appointments.Conclusion:Despite all this time,it has been observed that the issues mentioned in the study largely overlap with the public health aspect of medicine and today's perspective.We think that it is important to bring similar books to literature by evaluating them with field experts.

一测多评法测定食用玫瑰中5种非挥发性成分的含量

目的:建立以芦丁为内参物,利用HPLC一测多评法同时测定食用玫瑰中绿原酸、金丝桃苷、芹菜素-7-O-β-D-吡喃葡萄糖苷、槲皮素的含量,并进行方法学考察。方法:以食用玫瑰为研究对象,以芦丁为内参物,确定其他四种成分相对芦丁的校正因子(RCF),通过计算样品中绿原酸、金丝桃苷、芹菜素-7-O-β-D-吡喃葡萄糖苷、槲皮素含量;同时采用外标法测定食用玫瑰中5种成分,比较一测多评法(计算法)与外标法(实测法)结果的差异,并对方法性耐用性进行考察。结果:5种成分在相应的线性范围内线性关系良好,线性相关系数R^2>0.999,平均加标回收率在98.08%～99.51%,RSD在0.91%～1.87%,芦丁与绿原酸、金丝桃苷、芹菜素-7-O-β-D-吡喃葡萄糖苷、槲皮素的相对校正因子分别为1.910、0.728、0.698、0.382,且在不同试验条件下重现性良好(RSD<2.0%);6批食用玫瑰样品中5种成分按一测多评方法与外标法测定结果基本一致(RSD<1.0%)。结论:本文建立的一测多评方法操作简单,测定结果准确,能较大程度节约多成分含量测定成本,可作为一种新模式用于食用玫瑰中多成分定量,也可为全面监控食用玫瑰质量提供参考。

圆的奇特性质与应用

本文首先介绍圆是具有周长最短面积最大这一奇特性质,利用它解决多边形边长固定面积最大,及周长固定面积最大等实际问题。