Papers by Man Mahendra Singh
The Indian Journal of Agricultural Sciences
Direct seeded rice (DSR) with conservation agriculture (CA) can be a good option to replace the h... more Direct seeded rice (DSR) with conservation agriculture (CA) can be a good option to replace the highly water consuming puddle transplanted rice (Oryza sativa L.) for producing more per unit area with less water. The predictionof rice productivity through crop growth model is significant for further planning in water savings. There are various crop growth models used for predicting rice yield, but less information available on prediction of direct seeded rice under conservation agriculture. Therefore, the water driven FAO AquaCrop model (v.5.0) which requires minimum datasets was applied to the data generated from two years (2014 and 2015) field experimentation carried out in Research Farm, ICAR-Indian Agricultural Research Institute, New Delhi. The experiment was laid out in randomized block design in continuing experiment (5-6th year) with six CA practices in DSR and two puddle transplanted rice treatments and rice variety was PRH 10. The model was calibrated and validated using th...
Energy Advances
Reaction of 3s1 electron of Na with crystalline 6H2O of LnCl3·6H2O forming Ln(OH)3 and H2 for LSN... more Reaction of 3s1 electron of Na with crystalline 6H2O of LnCl3·6H2O forming Ln(OH)3 and H2 for LSNRs and LGT photocatalyst for photocatalyzing fluorescent dyes in sunlight with different quantum yields with SCR.
Chemical Engineering and Processing - Process Intensification, 2022
The present study reports KNO 3 recovery from seawater bittern by averting kainite, KMg(SO 4) Cl⋅... more The present study reports KNO 3 recovery from seawater bittern by averting kainite, KMg(SO 4) Cl⋅3H 2 O, schoenite, K 2 Mg(SO 4) 2 ⋅6H 2 O and carnallite, KCl⋅MgCl 2 ⋅6H 2 O mixed complex salts formation by adding NaNO 3. Reported KCl recovery via hazardous thermal decomposition of these salts has been modified to recover KNO 3 instead of KCl using green routes. The NaNO 3 widened salt solubilities have facilitated a faster evaporation with better crystal nucleation sequentially, giving end liquor for continued recovery as per solubility. Continued evaporation of hydrated ionic seawater bittern has recovered 96.26% KNO 3 , 97.19% NaCl, and 98.93% MgCl 2 .6H 2 O by disrupting hydration spheres. Solvay Process Effluent (SPE) CaCl 2 has desulfated the SO 2− 4 ions from respective mother liquor and NaNO 3 by reengineering the resultant ionic hydration spheres which had fastened evaporation. Desulfation separated CaSO 4 .2H 2 O leaving filtrate as mother liquor having KNO 3 , NaCl and MgCl 2 .6H 2 O. NaNO 3 addition to this mother liquor has catalyzed KNO 3 nucleation by engineering cohesive forces of Na +-Cl − and NO 3 −-K + hydration spheres on a sustained evaporation in evaporation compartment. Industrial sustainability of NaNO 3 route has been the recovery of CaSO 4 .2H 2 O, NaCl, MgCl 2 .6H 2 O, MgO, HCl and precipitated SiO 2 , a safer alternative of hazardous thermal decomposition.
Highly stable and homogeneously dispersed amino acid coated silver nanoparticles (ANP) of ≈ 10 nm... more Highly stable and homogeneously dispersed amino acid coated silver nanoparticles (ANP) of ≈ 10 nm diameter, ranging from 420 to 430 nm are prepared on AgNO3 solution addition to gum of Azadirachta indica solution at 373.15 K. The amino acids were selected based on their polarity. The synthesized nanoparticles were characterized by UV-Vis, FTIR spectroscopy, HR-TEM, XRD, SEM and 1H-NMR. The coated nanoparticles were used as catalyst for the reduction of methylene blue dye in presence of Sn(II) in aqueous, anionic and cationic micellar media. The rate of reduction of dye was determined by measuring the absorbance at 660 nm, spectrophotometrically and followed the order: Kcationic > Kanionic > Kwater. After 12 min and in absence of the ANP, only 2%, 3% and 6% of the dye reduction was completed in aqueous, anionic and cationic micellar media respectively while, in presence of ANP coated by polar neutral amino acid with non-polar -R group, the reduction completed to 84%, 95% and 98...
Journal of Scientific & Industrial Research, 2016
Protein-surfactant interactions in aqueous liquid mixtures have been industrially effective inter... more Protein-surfactant interactions in aqueous liquid mixtures have been industrially effective interface for understanding of protein unfolding dynamics. Thereby, UV absorbance (abs) study for 0.01 to 0.12% (w/v) BSA with aqueous Tweens (Tws) 20 to 80 at pre-critical micelle concentration (pre-CMC), CMC, post-CMC (CMCs) are reported at 298.15 K. The CMCs found as Tw 60 > Tw 80 > Tw 40 > Tw 20, were determined by the surface tension of Tws, and the preand post-CMC were derived from CMC. With Tws the abs at 200 to 320 nm depicts the structural changes in BSA due to unfolding it on account of hydrophilic and hydrophobic interactions (HHbI). A higher abs at λmax within 200 to 230 nm and lower abs at 280 nm infer BSA interactions with Tws via peptide bonds and amino acid groups respectively. The UV of 280 nm predicts a link between the states of BSA and their interaction with Tws for study of BSA activity.
The Journal of the Association of Physicians of India, 2021
OBJECTIVE Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of co... more OBJECTIVE Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of corona virus-induced disease 19 (COVID-19) that was declared as a global pandemic in March 2020 by the world health organization (WHO). Two vaccines were granted for emergency use by the Central Drugs Standard Control Organization (CDSCO) in India, Covishield® (AstraZeneca's vaccine manufactured by Serum Institute of India) and Covaxin® (manufactured by Bharat Biotech Limited). Sputnik - V has been granted EUA in the month of April 2021. The purpose of this study is to determine the association of COVID-19 infection, its severity and outcome in COVID-19 vaccinated people. METHODS This was a hospital based prospective cohort study done between March to June 2021 at PBM Associated Group of Hospitals (AGH), Bikaner, Raj. Total 1028 COVID suspected cases consulted in COVID OPD or hospitalized under department of medicine, out of which 146 satisfied the inclusion and exclusion criteria, out...
International Journal of Thermodynamics, 2008
Both benzene and water immiscible phases when mixed together develop an energetic interface that ... more Both benzene and water immiscible phases when mixed together develop an energetic interface that remains tense due to individual surface tensions. Physics of a tense interface does equilibrate tensional forces to have an optimized surface force which is denoted as Interfacial Tension (IFT, mN/m). The IFT between water and benzene with addition of surfactants: dodecyltrimethylammonium bromide (DTAB), trimethylsulfoxonium iodide (TMSOI), methyltrioctylammonium chloride (MTOAC) and 3,5-dihydroxytoluene monohydrate (Orcinol) critically decrease to 15.69, 12.86, 10.59, 8.36, 2.97 mN/m for DTAB , TMSOI, water, orcinol, MTOAC respectively. This lowering of IFT infers a higher mutual miscibility (MM) of the phases denoted as wetting. The DTAB and orcinol increased surface tension of water from 71.25 to 79.55 and 72.70 mN/m respectively at 304.65 Kelvin temperature due to stronger cohesive forces.
International Journal of Thermodynamics, 2007
Upper critical solution temperatures (UCSTS ± 0.05 K) and mutual solubilities of phenol + water s... more Upper critical solution temperatures (UCSTS ± 0.05 K) and mutual solubilities of phenol + water systems are reported separately with 0.5 millimol kg-1 (mm kg-1) proteins (casein, pepsin, egg-albumin), vitamins (B1-thiamine, B2-riboflavin, B6-pyridoxine), amino acids (glycine, β-alanine, L-leucine) and surfactants (dodecyl trimethylammonium bromide- DTAB, trimethylsulphoxonium iodide-TMSOI, methyltrioctylammonium chloride- MTOAC, orcinol). The additives decrease the UCSTs by about 0.50-2 0C with slight enhancement in mutual solubilities but the leucine with two –CH3 (methyl) and two - CH2- (methylene) groups produce negligible increase in the solubilities. The –CH3 and - CH2- groups develop stronger hydrophobic interactions but the glycine develops stronger hydrophilic interactions due to –N+H3 (amino) and –COO- (carboxylic) groups and weaker hydrophobic due to single –CH2- group. The leucine increases the solubility by 0.009 mole fractions with a 0.7 0C decrease in USCT as compared ...
The present review on some metal oxide nanoparticles used for pressure sensor, various metal oxid... more The present review on some metal oxide nanoparticles used for pressure sensor, various metal oxide containing such as (SnO2, ZnO, Al2O3, WO3, Fe2O3, Ga2O3, TiO2 and SiC, …etc.) responds detection pressure measure in kbar unit through oxygen activity as oxidation or reduction process of an integrated in devices sensor (MEMS, CMOS, MOX and MOXQ1D...etc.) that devices measuring of pressure as steam, air, gas, humidity and other substances. Pressure is extensive variable in physiochemical and thermodynamics investigation of matter at atmosphere.
New Journal of Chemistry, 2021
Correction for ‘Physicochemical interaction of cerium oxide nanoparticles with simulated biofluid... more Correction for ‘Physicochemical interaction of cerium oxide nanoparticles with simulated biofluids, hemoglobin, insulin, and ds-DNA at 310.15 K’ by Rajlakshmi Chetty et al., New J. Chem., 2020, 44, 1825–1845, DOI: 10.1039/C9NJ04155A.
New Journal of Chemistry, 2020
PVP capped Gd2O3:Eu3+ (PVP@Gd2O3:Eu3+) and HSA functionalised PVP@Gd2O3:Eu3+ (HSA@PVP@Gd2O3:Eu3+)... more PVP capped Gd2O3:Eu3+ (PVP@Gd2O3:Eu3+) and HSA functionalised PVP@Gd2O3:Eu3+ (HSA@PVP@Gd2O3:Eu3+) NPs as fluorescent detection probe for metal ion detection and MRI contrast agent.
New Journal of Chemistry, 2021
Ultrasound-accelerated optically active heterogeneous catalyst and sonochemical time driven therm... more Ultrasound-accelerated optically active heterogeneous catalyst and sonochemical time driven thermodynamic dye catalysis.
Materials Today: Proceedings, 2018
Nowadays smart and multifunctional materials with unique optical and several other physicochemica... more Nowadays smart and multifunctional materials with unique optical and several other physicochemical properties have pooled up potential to contribute with various applications in science and technological development. We have initiated a new innovative research work for synthesis of lanthanide nanocomposite by developing certain stoichiometric functional combinations of proteins and lanthanides as per energy distribution and Boltzmann partition functions which are based on capping, binding or occupying surface areas by adsorption on generating suitable Vander Waals and London dispersive forces as functional materials matrix. This work aims to synthesize a novel Albumen-CeO 2 Biofunctional nanocomposite (BFNC) and further study its potential antioxidant properties. In our work, 25µM to 150 µM CeO 2 NP with 150µM Albumen Physicochemical interaction was carried out to understand the optical behavior and aggregation. The result shows maximum interaction with 1:1 150µM CeO 2 NP: Albumen confirmed through UV-Vis spectrophotometer. The CeO 2-Albumen BFNC was synthesized by facile eco-friendly exsitu methodology with hydrodynamic diameter of 110.6 nm confirmed by Dynamic light scattering (DLS). The BFNC were characterized by UV-Vis spectrophotometer, FT-IR and DLS. The bare CeO2 NP and synthesized BFNC were tested for Antioxidant property by using 2, 2-Diphenyl-1-picrylhydrazyl (DPPH•). Thus BFNC shows 48.92% scavenging activity compared to that of 22.71% scavenging activity of bare CeO 2 NP. Thus the present research work shows that the design of such lanthanide based BFNC which exhibit unusual optical and surface functionalized biological properties could induce suitable biomedical properties for the host matrix, which can be used for the development of new inorganic or organic hybrid matrix systems.
RSC Advances, 2019
The wavy zone of flavonoid in aq-DMSO <10% DMSO predicts the kinetic energy and resultant mole... more The wavy zone of flavonoid in aq-DMSO <10% DMSO predicts the kinetic energy and resultant molecular dynamics.
New Journal of Chemistry, 2020
Interaction study in cerium oxide nanoparticles with biofluids and biomolecules via physicochemic... more Interaction study in cerium oxide nanoparticles with biofluids and biomolecules via physicochemical, spectroscopic and in silico analytical approaches, showing conformational change.
Arabian Journal of Chemistry, 2019
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
ACS Omega, 2019
Graphene oxide-based advanced functional materials offer an ultimate solution for wider biomedica... more Graphene oxide-based advanced functional materials offer an ultimate solution for wider biomedical applications. In situ thermodynamically ultrasound-assisted direct covalent functionalization of graphene oxide (GO) with sulfanilamide (SA) has synthesized f-(SA)GO. Raman spectroscopy, X-ray diffraction, high-resolution transmission electron microscopy, selected area electron diffraction pattern, scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, ultraviolet−visible spectroscopy, thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC) have analyzed the f-(SA)GO structure for functional activities, expressed through synergistic impact of heteroatomic domains (SIHAD). The TGA of GO and f-(SA)GO demonstrates their total weight losses of 82.0 and 61.1%, respectively. Enhanced thermal stability of f-(SA)GO infers an exothermic behavior obtained with DSC. The surface-induced in situ thermodynamically controlled nonspontaneous reaction for f-(SA)GO has facilitated calculations for activation energy (E a) = − 2.65 × 10 3 kJ mol −1 and Gibbs free energy (ΔG) = 8.3741 kJ mol −1 , energetics for biological activities with sulforhodamine B assay on MCF-7 and Vero cell lines and antioxidant potential by free radical scavenging activity with DPPH (2,2-diphenyl-1-picrylhydrazyl). Cell viabilities are >89.8% for Vero and >90.1% for MCF-7 with f-(SA)GO over 10 to 80 μg mL −1. Its cytocompatibility infers establishment of a new material. The morphological effect on MCF-7 and Vero cell lines confirm its structurally stable biocompatibility. The SIHAD of f-(SA)GO scavenges radical activity, and its heteroatomic structure causes valuable physiochemical activities. f-(SA)GO could emerge as an advanced functional biomaterial for structurally and thermally stable biocompatible nanocoatings.
Heliyon, 2019
Study reports the preparation of metal/surfactant complexes or Metal Organic Ionic Framework (MOI... more Study reports the preparation of metal/surfactant complexes or Metal Organic Ionic Framework (MOIF) based on ionic interaction of [Co(NH 3) 6 ] 3þ and Dioctyl sulfosuccinate (AOT)/Sodium dodecyl sulfate (SDS). MOIF is result of strong ionic interaction between cationic and anionic moieties without disturbing their own structures. MOIF of [Co(NH 3) 6 ] 3þ and SDS was found in solid powdery form while [Co(NH 3) 6 ] 3þ þ AOT produced sticky material. UV/Vis, FTIR, Raman and XRD measurements were used to characterize the MOIFs. The ionic interaction between cationic complex [Co(NH 3) 6 ] 3þ and anionic sulphur of AOT/ SDS was confirmed by comparing spectra with their parental moieties. MOIF containing hydrophilic and hydrophobic groups showed their dye interaction activity studied with methyl orange (MO) and methylene blue (MB) depicting impact of linear and iso-alkyl chain and hydrophilic amine groups. MOIF showed their protein binding nature, studied with bovine serum albumin (BSA), analyzed with spectrophotometric titrations revealing that hydrophobicity affects the interaction. In Dye and protein interactions, MOIF of [Co(NH 3) 6 ] 3þ þ AOT showed strong activities than MOIF of [Co(NH 3) 6 ] 3þ þ SDS due to more hydrophobicity associated with MOIF of [Co(NH 3) 6 ] 3þ þ AOT. MOIFs have also shown good scavenging effect tested in vitro against free radical, 2,2diphenyl-1-picrylhydrazyl (DPPH), and the same, strong interaction for MOIF of [Co(NH 3) 6 ] 3þ þ AOT noticed.
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Papers by Man Mahendra Singh