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Pandey Avantika,Agrawal Madhoolika,Agrawal Shashi Bhushan 한국원예학회 2022 Horticulture, Environment, and Biotechnology Vol.63 No.6
Psoralea corylifolia (bakuchi) is a traditional, medicinally important herbal plant of the family Fabaceae. In particular, seeds are vital in treating skin diseases, such as leprosy, psoriasis, and leukoderma. Global climate change and the threat of stratospheric ozone depletion are already marked, so unveiling the implications of UV-B radiation on medicinal plants is imperative. In this backdrop, the present study aimed to assess the eff ect of elevated UV-B (eUV-B; ambient + 7.2 kJ m −2 d−1) on the content and composition of essential oils and how other factors such as growth, anatomy and photosynthetic adap- tations were involved in this. Plant growth and physiological parameters were lower under eUV-B treatment than in the control (except carotenoid and water use effi ciency). Due to eUV-B exposure, the number of racemes, fl owers and seeds reduced signifi cantly compared to their numbers in the control. The essential oil content of seeds increased by 46.4% under the eUV-B treatment compared with that in the control. The GC–MS analysis of essential oil revealed that monoterpenes decreased, whereas meroterpene and sesquiterpenes increased under eUV-B treatment as compared to control. Caryophyl- lene, caryophyllene oxide and bakuchiol (which possesses anti-cancerous and anti-infl ammatory activities) were identifi ed as major metabolites and increased under eUV-B as compared to control. The study emphasizes that under eUV-B exposure, a reduction in growth and physiology of P. corylifolia was accompanied by an increase in essential oil content, antioxidant capacity and content of medicinally important compounds.
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Monoj Kumar Mondal,Shalini Srivastava,Shashi Bhushan Agrawal 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.2
Phaseolus vulgaris husk as a novel, very common milling agro waste, showed good performance for mutagenic Cr(VI) removal from chromium enriched aqueous solution. The study involves batch experiments to investigate the effects of influencing parameters, such as pH, temperature, contact time, initial Cr(VI) concentration, and adsorbent dose, on the adsorption process. Results showed a maximum of 99.88% removal of Cr(VI) at pH 1.16, temperature 20 oC and adsorbent dose of 6 g L−1. The adsorption equilibrium data followed the Freundlich model, suggesting a heterogeneous nature of the adsorbent surface and the correlation coefficient for pseudo-second-order kinetic model was found to be very high, showing its applicability during the adsorption process. The maximum Cr(VI) uptake capacity was 3.4317mg g−1. Thermodynamic parameters like standard free energy change (−7.175 kJ mol−1), enthalpy change (−8.29 kJ mol−1) and entropy change (0.005 kJ mol−1 K−1) revealed the spontaneous and exothermic nature of adsorption of Cr(VI) onto P. vulgaris husk. Desorption with 1mol L−1 NaOH followed by 1mol L−1 HCl was effective (92.76%) and, hence, it exhibited the possibility of recycling of used husk.
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