Surveying ionizing radiations in real time using a smartphone

Surveying ionizing radiations of the surrounding with a smartphone provides a low-cost and convenient utility for the general public. We developed a smartphone application(App) that uses the built-in camera with a CMOS sensor and a radiation signal extraction algorithm.After a calibration through a series of radiation exposures,the App could display radiation dose rate and cumulative dose in real time without requiring covering the camera lens. A smartphone with this App can be used as a fast survey tool for ionizing radiations.

婴儿期牛奶为基础的饮食与肠道微生态

从出生开始,肠道菌微生态的组成和多样性就对人体健康发挥着重要作用。婴儿从喝奶到进食固体食物的过程中伴随着肠道菌群的显著变化,这也反映了饮食对肠道菌群结构和功能的重要影响。人奶中的复杂寡糖是婴儿肠道共生菌的必要营养。婴儿肠道中最重要的共生菌——双歧杆菌,其生长依赖于α1,2-岩藻糖基化寡糖。不是所有人的乳汁中都有α1,2-岩藻糖基化寡糖,因此寡糖分泌者与非分泌者之间的肠道菌群尤其是双歧杆菌存在较大差异。婴儿肠道α1,2-岩藻糖基化寡糖和双歧杆菌的缺乏可能对健康有不良影响。