Yingyu Zhou

Keywords wrist-worn pressure sensor electret pulse wave blood pressure health monitoring Introduction Cardiovascular diseases (CVDs), such as ischemic heart disease and stroke, have become a major issue affecting human lifespan.1 According to statistics, CVDs caused approximately 17.8 million deaths globally in 2017,2 and the number of casualties could reach 23.6 million by 2030.3 Hypertension is one of the main risk factors for CVDs. Therefore, regular monitoring of blood pressure (BP) is...

1 Introduction Heme, an important tetrapyrrole compound and a versatile prosthetic group in electron transport system (ETS), has been widely applied in daily life, medicine, health and future food (Hansson and Hederstedt, 1994; Chau et al., 2011; Phillips, 2019). Recently, bioproduction of heme by engineered microbes has attracted intensive attention due to its simple and environmentally friendly production processes (Zhao et al., 2018).

4.1. Flatness Detection and Analysis Figure 17 depicts the sample points of the circular thermal battery. The position of the circular fastening screw on the plane of the bottom plate under test was taken as the origin, O, and the positions of the screws around it were marked as A, B, C, D, E, and F. The flat-ness of AOD, BOE, and COF in three straight directions was measured.