Carbon dots derived fluorescent nanosensors as versatile tools for food quality and safety assessment: A review

Publication date: Available online 19 November 2019Source: Trends in Food Science &TechnologyAuthor(s): Xueli Luo, Yong Han, Xiumei Chen, Wenzhi Tang, Tianli Yue, Zhonghong LiAbstractBackgroundFood analysis is essential in monitoring food quality for risk assessment regarding public health. Traditional techniques can meet the requirement of routine food analysis in laboratory. However, serious food safety situations urgently demand rapid, time-saving, low-cost analysis methods even on-site, portable and household testing kits. Fluorescence analysis exhibits immense potential for food safety owing to its remarkable advantages of high sensitivity, ease of operation, low cost and rapid result outputs.Scope and approachCarbon dots (CDs) are novel 0D carbonic nanomaterials recently emerging as potential substitutes for traditional fluorescent materials. Compared with the conventional fluorescent materials, e.g. organic fluorescent dyes, metal nanoparticles/nanoclusters and quantum dots (QDs), CDs possess many appealing merits such as ease of preparation, low cost, non-blinking, low cytotoxicity, excellent biocompatibility and high resistance to photo-bleaching. As a result CDs-based fluorescence sensing provides excellent analysis platforms for monitoring food-related analytes. This review provides a comprehensive overview of the state-of-the-art synthesis methods and the fluorescence properties of CDs along with the sensing mechanisms and designing principles of CDs-based flu...
Source: Trends in Food Science and Technology - Category: Food Science Source Type: research

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This study aims to assess whether older adults with low muscle mass or strength, in the presence of obesity, have an increased risk of knee (TKR) and hip replacement (THR) over 13  years. 1082 community-dwelling older adults (51% women; mean age 62.9 ± 7.5 years) were studied at baseline and multiple time points over 13 years. The incidence of TKR and THR was determined by data linkage to National Joint Replacement Registry. Appendicular lean and fat mass were measure d using DXA. Lower-limb muscle strength (LMS) was assessed by dynamometer. Low muscle mass and strength were defined as t...
Source: Calcified Tissue International - Category: Orthopaedics Source Type: research
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