Enhancing cotton fabric dyeing: Optimizing Mordanting with natural dyes and citric acid.

This study investigates the optimization of fabric dyeing using natural dyes extracted from Clitoria ternatea, Cudrania javanensis, and Hibiscus sabdarifa by enhancing the mordanting process with citric acid. The principle of adding citric acid is as a crosslinker agent between cotton fabric and dye through an esterification reaction. A central composite design (CCD) of the response surface methodology (RSM) is employed to optimize parameters.

Robust construction of polyvinyl alcohol intercalated graphene oxide nanofiltration membrane for desalination via pervaporation.

The construction and modification of a Graphene Oxide (GO) membrane, incorporating polyvinyl alcohol (PVA) cross-linked with maleic acid (MA) and supported by a nylon membrane, have been successfully completed. Systematic variations in PVA and MA concentrations were conducted to achieve membranes with favorable characteristics, stability, and excellent desalination performance. Optimization studies utilizing the Central Composite Design (CCD) revealed that the most optimal desalination results were obtained with 10 mL of PVA (0.

[Analysis on personal protection in occupational population at high risk for brucellosis and influencing factor in China].

To understand the current status of personal protection in occupational population at high risk for brucellosis in China and provide evidence for the evaluation of implementation of National Brucellosis Prevention and Control Plan (2016-2020). Four counties in Shanxi Province and Xinjiang Uygur Autonomous Region were selected to conduct a questionnaire survey in occupational population at high risk for brucellosis from December 2019 to July 2020 by using cross-sectional survey methods. A total of 2 384 persons at high risk for brucellosis were surveyed, and the standardized utilization rate of personal protective equipment (PPE) was 20.