लक्षद्दीप समूह जीववैविधता और व्यवस्था

कृपया पूरा लेख पढे

Assessment of hardened characteristics of raw fly ash blended self-compacting concrete

Fly ash is widely used as a supplementary cementitious material in concrete. Due to the implementation of new thermal power plants as a consequence of electricity demand, generation of fly ash is noticeably increased. In addition to pozzolana blended cement production, it is very imperative to use raw fly ash in concrete. Earlier research studies investigated the performance of processed fly ash in blended cement production as well as in concrete. In general, ground fly ash is used in blended cement production. A comprehensive study on the performance evaluation of raw fly ash in self-compacting concrete is not available in the existing literature. Moreover, utilization of raw fly ash in special concrete such as self-compacting concrete is essential to comprehend the performance of raw fly ash blended concrete compared to ordinary Portland concrete. Additionally, it will help to achieve maximum utilization of raw fly ash as a supplementary cementitious material rather than disposal as a waste, which eventually leads to several environmental issues. In the study, raw fly ash was collected and is directly used in development of self-compacting concrete. Two mixes were cast and hardened characteristics of blended concrete were investigated. Results from the study showed comparable performance with control concrete. Furthermore, significant reduction in chloride permeability was observed for raw fly ash blended concrete

Formulation and Evaluation of Herbal Emulgel of Pothos scandens Linn for Burn Wound Healing Activity

The main aim of this work was to formulate the leaf extract of Pothos scandens in to an emulgel and investigate their burn wound healing activity. Ethanolic extract of dried leaves of Pothos scandens were subjected to preliminary phytochemical evaluation and wound healing activities studies. Emulgel formulations were prepared using three types of gelling agents: Carbopol 934, Carbopol 940 and HPMC K4M. The influence of the type of the gelling agent on the drug release from the prepared emulgel was investigated. The prepared emulgel were evaluated for their physical appearance, pH, viscosity, spreadability, in vitro drug release, pharmacological activity and stability. It was finally concluded that the formulation F1 with 1%w/w Carbopol 940 was found to be more promising formulations as it shows better physicochemical characteristics and higher pharmacological activity compared to other formulations. Herbal emulgel of ethanolic extract of Pothos scandens shows significant improvement in burn wound contraction and hence this is a promising candidate in burn wound healin