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Mishra, Priya,Singh, Sarita,Ankit, Preyas,Fatma, Shahin,Singh, Divya,Singh, Jagdamba Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.4
Herein is reported a simple and efficient synthesis of isoflavones starting from various substituted phenacyl bromides and salicylaldehydes in presence of NHC. The mechanism involved domino catalysis type approach with consumption and regeneration of catalyst in two catalytic cycles. This method proved to be very lucrative and gives very good yield. The method described here represents an environmentally benign alternative to classical approach.
Priya Mishra,Sarita Singh,Preyas Ankit,Shahin Fatma,Divya Singh,Jagdamba Singh 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.4
Herein is reported a simple and efficient synthesis of isoflavones starting from various substituted phenacyl bromides and salicylaldehydes in presence of NHC. The mechanism involved domino catalysis type approach with consumption and regeneration of catalyst in two catalytic cycles. This method proved to be very lucrative and gives very good yield. The method described here represents an environmentally benign alternative to classical approach.
Bramha Gupta,Tanwi Priya,Brijesh Kumar Mishra 대한환경공학회 2021 Environmental Engineering Research Vol.26 No.3
Conventional coagulation techniques have shown inefficacy for the removal of DBPs precursor i.e. hydrophobic NOM. The present study has used a bio-flocculant named Ficus benghalensis to enhance the coagulation activity of alum for the removal of hydrophobic NOM. The coagulation activity of the augmented treatment (Alum-F. benghalensis) system was validated using spectroscopic analysis. The augmented system had shown an increment in DOC and A254 removal by ~30% and ~16%, respectively. ASI and A272 had shown a continual decrease (from 0.12 to 0.08 and 0.46 to 0.23, respectively) for the augmented system. Chlorine demand was found lesser for the augmented system (1.4 ㎎/L) compared to alum (1.55 ㎎/L) only. The augmented system had shown a drastic reduction (from 0.1459 to 0.0638) in the value of (-ΔA272), which is directly related to the reduction in THMFP. The combined effects of sweep coagulation and charge neutralization were the responsible mechanisms for the augmented coagulation system. The noteworthy anti-bacterial activity of F. benghalensis was observed due to the presence of silver, copper, and traces of chlorine in its structure. Thus, the proposed augmented coagulation system can be used to remove the hydrophobic NOM from the water.