http://nopr.niscpr.res.in/handle/123456789/63862 Sat, 10 Oct 2026 06:43:09 GMT 2026-10-10T06:43:09Z http://nopr.niscpr.res.in/handle/123456789/63879 Title: Preparation and evaluation of natural lipstick from beetroot (Beta vulgaris) extract medicated with acyclovir Authors: Bava Bakrudeen, H.; Khambhaty, Yasmin; Suguna Lakshmi, Madurai; Alagumuthu, Tamilselvi Abstract: The purpose of this study is to address the health concerns associated with heavy metal contaminants in traditional lipstick formulations. The objective is to develop a safer alternative to conventional lipsticks while ensuring stability and efficacy. The medicated lipstick has been successfully synthesized using a dispersion method, with oil serving as the dispersing media. Incorporation of beetroot powder extract imparted colour to the lipstick, while acyclovir drug has been effectively integrated into the formulation. Particle size analysis revealed that the lipstick particles ranged from 300 nm to 600 nm, with an average particle size of 407 nm, indicating suitable dispersion and homogeneity. Stability studies conducted over a period of 35 days demonstrated good stability of the products, suggesting its potential for long-term use. Further, different colour lipstick was synthesized with the same stability by altering the oil and beetroot extract composition. In conclusion, this study highlights the potential of natural ingredients and pharmaceutical additives in cosmetic formulations to enhance safety and efficacy, paving the way for further research and development in this area. Page(s): 337-345 Wed, 01 May 2024 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/63879 2024-05-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/63878 Title: Transportation of SWCNT and MWCNT-based nanofluid through an exponentially stretching Riga plate in the presence of shear heating Authors: Kunwar Chouhan, Kiran; Chaudhary, Santosh Abstract: Nanofluids accomplish better results in heat transfer practices due to their exceptional thermal characteristics than traditional heat transfer fluids. This study reports the thermophysical behavior of carbon nanotube-based nanofluid flow through an exponentially stretched Riga plate, along with the contribution of variable dynamic viscosity, velocity slip, and viscous dissipation impacts. Nanofluid consists of single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) in aqueous solution. Boundary layer flow is intended to be steady, laminar, viscous-incompressible, and two-dimensional. Governing system of partial differential equations is elucidated with pertinent similarity transformations into dimensionless form. Simplified mathematical model is numerically operated through the spectral relaxation method. Significance of sundry parameters over momentum and heat profiles are delineated via graphs. Also, inconsistencies in point-specific skin drag coefficient and Nusselt heat transfer index are conferred through acquired numerical data. Page(s): 346-354 Wed, 01 May 2024 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/63878 2024-05-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/63877 Title: Removal of methyl orange and methylene blue from wastewater by magnetic nanocomposites loaded activated carbon synthesised from walnut shell Authors: Anitha, Panneerselvam; Ramachandran, Arumugam; Sudha, Ramasamy; Valarmathi, Nataraj; Geetha, Dharamraj Abstract: The novel magnetic nanocomposites activated carbon (MWNSC) has been synthesised from activated carbon (AC), produced from walnut shell through pyrolysis method. This adsorbent has been characterized by FTIR, BET, TEM, SEM and EDX analysis techniques. The effects of various adsorption factors such as pH of the dye solution, contact time, and adsorbent dose have been studied. Adsorption isotherms have been employed to test the experimental data, and the results corresponded well to the Langmuir model, with MO and MB having maximal adsorption capacities of 303.30 and 345.70 mg g-1, respectively. Adsorption kinetics have been studied using pseudo-first-order, pseudo-second-order, Elovich and intraparticle diffusion models, and the experimental results are well-fitted with the pseudo second-order model. According to the dye adsorption's thermodynamics, the process is exothermic, spontaneous, and favourable from a thermodynamic standpoint. The method is applicable to real wastewater samples, with 99 % removal of MO and MB. The outcomes of the present study show that MWNSC is an inexpensive biosorbent that is successfully utilized in removing methyl orange and methylene blue dyes from wastewater. Page(s): 355-368 Wed, 01 May 2024 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/63877 2024-05-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/63876 Title: Electrochemical splitting of water on IrO2 based Nafion bonded composite anode for efficient production of low cost and clean hydrogen fuel Authors: Sonkar, Saraswati; Pramanik, Hiralal Abstract: Hydrogen gas of ultrapure form has been produced via electrochemical splitting of water molecules using an efficient water electrolysis method. The IrO2 based low-cost composite anode has been developed in the laboratory to split water molecules via electrolysis with the cathode electrocatalyst as Pt (40 % by wt.)/CHSA. The electrocatalysts loading at anode and cathode are 1 mg/cm2 at both electrodes. Other components of the manufactured electrodes are Nafion® (5 wt%) ionomer dispersion, PTFE, and isopropyl alcohol. The electrolyzer is fabricated using a perspex sheet i.e., polymethyl methacrylate. The rate of hydrogen production is measured for different applied currents, voltage, and concentrations of H2SO4 electrolyte in the electrolysis mode at a temperature of 20 ℃. The IrO2 composites anode used as oxygen evolution reaction are studied by electrochemical impedance studies (EIS) and cyclic voltammetry to evaluate the electrocatalytic activity and charge transfer resistance of the developed composite anode. The IrO2 anode electrode exhibits a higher HER activity concentration of 0.75 M H2SO4 electrolyte than that of the 0.25 M and 0.50 M H2SO4 electrolyte concentration as is shown by EIS. The highest hydrogen production rate of 0.9 mL/min is obtained at the voltage of 1.9 V and applied current of 0.1 A using the electrolyte concentration of 0.75 M H2SO4. However, the hydrogen production rate is very low (0.33 mL/min.) when a low voltage of 1.6 V and current of 0.04 A was applied at the same concentration of electrolyte (0.75 M) H2SO4. IrO2 is known to be one of the most active electrocatalysts for the oxygen evolution reaction in a liquid electrolyte, exhibiting high electronic conductivity and stability in the electrochemical system. Page(s): 369-382 Wed, 01 May 2024 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/63876 2024-05-01T00:00:00Z