Prevalence, awareness, treatment and control of hypertension in Henan Province, China.

OBJECTIVE: The present article aimed to explore and evaluate the epidemiology and determine the status of hypertension awareness, treatment and control in Henan province, China. DESIGN: Cross-sectional survey. SETTING: Thirty counties in Henan province of China. PARTICIPANTS: There were 18 772 randomly selected 15-74 years old. MAIN OUTCOME MEASURES: The distribution of blood pressure and prevalence, awareness, treatment and control of hypertension based on automated electronic monitor and questionnaire. RESULTS: The crude prevalence of hypertension was 24.9%, and the standardised rate was 26.6%, meaning about 25 million were hypertensive in Henan province. Of which, 46% were aware of their hypertension diagnosis, 35.7% were having antihypertensive medicine, only 10.4% had their blood pressure controlled less than 140/90 mmHg, and 29.1% were being controlled when they were having antihypertensive medicine. CONCLUSIONS: Hypertension is highly prevalent in Henan province, but the levels of hypertension awareness, treatment and control are low. Therefore, necessary actions including prevention, detection and treatment must be taken to keep the situation from worsening.

Fabrication of biocompatible and mechanically reinforced graphene oxide-chitosan nanocomposite films.

BACKGROUND: Graphene oxide (GO)can be dispersed through functionalization, or chemically converted to make different graphene-based nanocomposites with excellent mechanical and thermal properties. Chitosan, a partially deacetylated derivative of chitin, is extensively used for food packaging, biosensors, water treatment, and drug delivery. GO can be evenly dispersed in chitosan matrix through the formation of amide linkages between them, which is different from previous reports focusing on preparing GO/chitosan nanocomposites through physical mixing. RESULTS: In this study, free-standing graphene oxide-chitosan (GO-chitosan) nanocomposite films have been prepared. The GO-chitosan films are biologically compatible and mechanically reinforced. Through the formation of amide linkages between GO's carboxylic acid groups and chitosan's amine groups, GO could be evenly dispersed within the chitosan matrix. We also characterized the GO-chitosan composite films using element analysis, Fourier transform infrared spectroscopy, X-ray photo electron spectroscopy, differential scanning calorimetry, and thermo gravimetric analysis. Compared to pristine chitosan film, the tensile strength of GO-chitosan film is improved by 2.5 folds and Young's modulus increases by nearly 4.6 folds. The glass transition temperature of GO-chitosan composite film shifts from 118°C to 158°C compared to the pristine chitosan, indicating its enhanced thermal stability. GO-chitosan composite film was also evaluated for its biocompatibility with C3H10T1/2 cells by in vitro fluorescent staining. The graphene oxide-reinforced chitosan composite films could have applications in functional biomaterials. CONCLUSION: The present study describes a useful and simple method to chemically attach biocompatible chitosan onto graphene oxide. We envision that the GO-chitosan film will open avenues for next-generation graphene applications in the realm of functional biomaterial.