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21.
R. L. Sharam Jasbir Singh Surinder Kumar Daljeet Kour Anand Sachar Shallu Poonam Bhawana 《Journal of heterocyclic chemistry》2007,44(6):1501-1504
22.
Ghorai Santu Chakraborty Priyanka Poria Swarup Bairagi Nandadulal 《Nonlinear dynamics》2020,100(1):749-762
Nonlinear Dynamics - Dispersal-induced pattern formation is important from both fundamental and application points of view. Spatial pattern in an ecological system can strongly depend on exogenous... 相似文献
23.
Sreedhar I. Agarwal Bhawana Goyal Priyanka Agarwal Ankita 《Journal of Solid State Electrochemistry》2020,24(6):1239-1270
Journal of Solid State Electrochemistry - Solid oxide fuel cells (SOFCs) have emerged as the potential power generating devices, being profoundly effective, biofuel-based, and causing negligible... 相似文献
24.
Bhawana Gupta Nidhi Kalgotra Savit Andotra Sushil K. Pandey 《Monatshefte für Chemie / Chemical Monthly》2012,39(5):1087-1095
Abstract
O-Tolyl/benzyl dithiocarbonates, ROCS2Na (R = o-, m-, or p-CH3C6H4–, and –CH2C6H5), were synthesized and characterized. These new ligands reacted with PCl3/POCl3 in refluxing toluene which resulted in the formation of phosphorus(III) and phosphorus(V) tolyl/benzyl dithiocarbonates corresponding to [(ROCS2) n PCl3−n ] and [(ROCS2) n POCl3−n ] (R = o-, m-, or p-CH3C6H4–, and –CH2C6H5; n = 1, 2, 3). These pale yellow liquid compounds were characterized by IR, mass, and NMR (1H, 13C, and 31P) spectral studies, which suggest the dithiocarbonate ligands bind in a monodentate mode leading to P–S–C linkages in these derivatives. 相似文献25.
26.
Nidhi Kalgotra Bhawana Gupta Kuldeep Kumar Sushil K. Pandey 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3):364-375
Abstract Reactions of O-tolyldithiocarbonate ligands, (o-, m-, and p-CH3C6H4O)CS2Na, with anhydrous FeCl2 (1:2 molar ratio) and with FeCl3 (1:1 and 1:3 molar ratio) yielded the complexes [{(CreO)CS2}2Fe] and [{(CreO)CS2}nFeCl3–n] (Cre = o-, m-, and p-CH3C6H4; n = 1 and 3), respectively. These complexes were reacted with nitrogen and phosphorus donor ligands in dichloromethane, which afforded the adducts corresponded to [{(CreO)CS2}2Fe.xL] and [(CreO)CS2FeCl2.xL] {x = 1, L = N2C12H8; x = 2, L = NC5H5, P(C6H5)3}. Elemental analyses and IR, UV-visible, and mass spectroscopic and magnetic studies indicated bidentate mode of bonding by dithiocarbonate ligands leading to sixcoordination around the iron atom as a consequence of Fe…Fe interaction in the complexes [{(CreO)CS2}2Fe] and [(CreO)CS2FeCl2]. The complexes exhibited antifungal activity. The fungicidal activity of the complexes has been tested by poisoned food technique using fungi Fusarium sp. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements for the following free supplemental resource: Antifungal Activity. 相似文献
27.
Thickness of the electro‐polymerized layer grown on a substrate and used as the recognition element for the analyte is critical to measuring the response of a biosensor, with high sensitivity and accuracy. However, it is difficult to control the thickness during synthesis. A mathematical model is developed in this study that considers thickness of the electro‐polymerized layer in simulating the electrochemical response of a non‐enzymatic biosensor for cholesterol in blood. The model includes transient kinetics and one‐dimensional diffusion of the analyte in the poly‐methyl orange (PMO) recognition layer electrochemically grown on the electrode. The governing partial differential equations resulting from the species conservation balances in the PMO layer are numerically solved. Time and spatial concentration profiles of the analyte in the PMO layer are determined. Model predictions are calibrated with the experimental data for different PMO thicknesses. Interestingly, model predictions show a linear response over the calibrated concentration range of cholesterol for all PMO layer thicknesses. Based on the chronoamperometry measurements, the model predictions for the cholesterol concentrations measured in the laboratory samples were also found to be remarkably accurate. This is the first mathematical model developed to understand the transport and kinetics of an analyte in the electro‐polymerized layer used as the recognition element of a non‐enzymatic biosensor. 相似文献
28.
A simple and mild procedure for the synthesis of iodo substituted 1H-pyrano[4,3-b]quinolines has been achieved using NIS reagent in the absence of base from 2-alkynylquinoline-3-carboxaldehydes via intramolecular electrophilic cyclization onto alkynes in good to excellent yields in a short duration of time. The reactions proceeded smoothly in a normal solvent in aerobic atmosphere at room temperature. The presence of substituent at either quinoline or alkyne moieties did not show effect on reaction rate of cyclization. The palladium-catalyzed transformations of iodo group to C-C bond are also discussed. 相似文献
29.
N. Bairagi J. Chattopadhyay 《Mathematical and Computer Modelling of Dynamical Systems: Methods, Tools and Applications in Engineering and Related Sciences》2013,19(3):257-272
Elevated salinity, accelerated eutrophication, blooms of Avian botulism and dramatic water quality fluctuation are supposed to be the key factors for massive die-off of Tilapia (prey) and Pelican (predator) in the Salton sea. We modify the model of Chattopadhyay and Bairagi [Ecological Modelling 136 (2001), pp. 103-112] with an assumption that the growth rate of susceptible fish population is very high and study the dynamics of the system by introducing a delay factor in the predator response function. It is observed that the otherwise stable system exhibit a stable limit cycle solution when the lag factor attains its critical value. It is also observed that there is a high possibility of an epidemic out break in the fish as well as in the Pelican population if the predation process is delayed by a considerable amount of time. Numerical simulations for a hypothetical set of parameter values are presented to illustrate the analytical findings. 相似文献
30.
Bhawana S. Tripathi Anjali Awasthi Puneet K. Pandey Aashees Awasthi 《Indian Journal of Physics》2010,84(4):449-458
The coefficients of thermal expansion (α) of ternary liquid mixtures of heterocyclic compounds viz., pyridine/quinoline with phenol in benzene have been evaluated at 308.15, 318.15 and 328.15 K, respectively. A comparative
study of thermal expansivity using different models for hard sphere equation of state and Flory’s statistical theory has been
made. The computed values of thermal expansivity are compared with the experimental results. The excess values of thermal
expansivity have also been computed and utilized to discuss the existence and strength of intermolecular interactions in the
ternary liquid system under investigation. 相似文献