Application of biodegradable colorimetric films based on purple tomatoes anthocyanins loaded chitosan and polyvinyl alcohol in pork meat.

A series of biodegradable colorimetric films were prepared by using chitosan and polyvinyl alcohol as matrix, in which, the weight ratio of chitosan: Polyvinyl alcohol was 100: 0, 80: 20, 50: 50, 20: 80, or 0: 100, with addition of 10% (w/w, relative to chitosan) anthocyanins extracted from purple tomatoes (purple tomatoes anthocyanin) as pigment. The aim of this study was to observe the effect of weight ratio (chitosan: Polyvinyl alcohol) on the mechanical properties, contact angle, swelling rate, pH sensitivity, antioxidant properties of chitosan-polyvinyl alcohol/purple tomatoes anthocyanins films, and the antibacterial activity of films produced for pork packaging. In addition, the films as a smart colorimetric indicator for monitoring the freshness of pork was investigated.

[At-risk drinking screening by general practitioners: A survey of patients in primary care].

Background: The screening of patients who are at-risk drinkers, which means exceeding the thresholds defined by health authorities or associated with a specific situation (taking psychotropic drugs, having an organic pathology, driving a vehicle, drinking during pregnancy), represents a major issue in primary care. Few studies have offered perspective from the patients' standpoint. The main purpose of this study was to describe general practitioners at-risk drinking screening from their patients point of view.