Iot Based Sensor Network for Crack & Bend Monitoring in Railway Track

Abstract: In India railway is one of the most common means of transport, which is the fourth largest railway community in the world. Even though Indian railways has an outstanding boom, it remains plagued because of some of the major issues like problem in gate crossing, fire accidents and problem in the track which remains unmonitored causing derailment. The tracks contract and expand due to changes in season. Due to this crack may develop on the track. This proposed system identifies the cracks and the obstacles on the track using sensors The project railway crack and object detection are a forward step to improving the railway system. The system performs two main functions. The first one is detecting the crack on the railway track by using the Flex sensor and the second one is detecting the object by using IR sensor.</jats:p

Studies on aerial parts of Artemisia pallens wall for phenol, flavonoid and evaluation of antioxidant activity

Herbs have been used for medicinal purposes for centuries. According to recent investigations, they may help reduce the risk of chronic diseases, cardiovascular disease, and cancer due to antioxidant properties, which in turn can be attributed to the various phytoconstituents. With this intention, evaluation of antioxidant activity was performed. Methanol extract of aerial parts of Artemisia pallens Wall was screened for its antioxidant activity due to phenolic and flavonoid contents, by employing radical scavenging assays; 2,2 –diphenyl, 1-picryl hydrazyl (DPPH) and nitric oxide. Ascorbic acid was used as a standard. Quantitative determination of phenols and flavonoids were carried out using spectrophotometric method. Total flavonoid content was determined as quercetin equivalent and total phenolic content was determined as pyrocatechol equivalent using Folin-Ciocalteu reagent. Plant produces more phenolic compounds than flavonoids. IC50 value of methanol extract for DPPH free radical scavenging activity was found to be 292.7 μg, whereas for nitric oxide it was 204.61 μg. The result obtained in the present study indicates that the aerial parts of this plant are a rich source of natural antioxidant