Evaluation of AgNCs@PEI and their integrated hydrogel for colorimetric and fluorometric detection of ascorbic acid.

A dual-mode colorimetric and fluorometric sensor based on water soluble silver nanoclusters (AgNCs@PEI) is developed for quantitative and visual detection of ascorbic acid (Asc A). The detection method relies on the Asc A induced aggregation of AgNCs@PEI, which resulted in fluorecsence quenching of the sensor. The clusters exhibited a unique combination of static and collisional quenching with a wide range of dynamic detection (1-10 µM) Linear relationship was observed in the concentration range 10-10 µM using fluorescence and 0.

Antibody-labeled Gold Nanoparticles Based Immunosensor for the Detection of Thyroxine Hormone.

Immunosensors are used to provide simple, quick and effective ways to detect analytes for the diagnosis of a number of diseases. This work reports on a novel optical immunosensor based on thyroxine antibody labeled gold nanoparticles (anti-T4/C-AuNPs) for the sensitive detection of the thyroxine (T4) hormone. T4 hormone is a reliable diagnostic biomarker present in the human blood serum that is necessary for normal neural development and cellular metabolism.

A Split-face Comparative Study of 70% Trichloroacetic Acid and 80% Phenol Spot Peel in the Treatment of Freckles.

Aim: To study and compare the efficacy of TCA (70%) and phenol (80%) in the treatment of freckles.

Settings And Design: A prospective study was done, over one year, on patients having freckles on the face. The freckles on the right side of the face were treated with TCA (70%) and those on the left side of the face were treated with phenol (80%).