Deen Dayal Upadhyay Gorakhpur University

About: Deen Dayal Upadhyay Gorakhpur University is a education organization based out in Gorakhpur, Uttar Pradesh, India. It is known for research contribution in the topics: Thermal decomposition & Lymnaea acuminata. The organization has 1032 authors who have published 1591 publications receiving 21734 citations. The organization is also known as: Gorakhpur University.

Shape Controlled Synthesis of Nano-Sized Titanium(IV) Metal-Organic Frameworks

Abstract: A convenient method to synthesize shape controlled nano-sized metal-organic frameworks (MOFs) has been explored to prepare some novel mixed–ligand complexes of titanium(IV) with the general formula [Ti(acac)Cl2−n(OOCC15H31)(SB)n] (where Hacac = acetylacetone, HSB = Schiff bases and n = 1 or 2). They have been synthesized by stepwise substitutions of chloride ions from titanium(IV) chloride. The complexes were characterized by elemental analyses, molecular weight determinations, spectral, and TEM studies. Coordination number 7 and 8 was assigned for titanium(IV) in the complexes. The powder XRD, TEM, and SAED studies indicates that these complexes are nano-sized having poor crystalline nature.

Microwave‐assisted synthesis, spectroscopy and biological aspects of binuclear titanocene chelates of isatin‐2,3‐bis(thiosemicarbazones)

Abstract: The reactions of bis(cyclopentadienyl)titanium(IV) chloride with a new class of bis(thiosemicarbazones) (H2L), derived by condensing isatin with different N(4)-substituted thiosemicarbazides, have been studied both by a conventional stirring method and also using microwave technology. Binuclear products of type [{(η5-C5H5)2TiCl} 2(L)] have been isolated in both cases. Tentative structural conclusions are drawn for the reaction products based upon analysis, electrical conductance, magnetic moment and spectral (UV-visible, IR, 1H NMR and 13C NMR) data. FAB mass spectra of these compounds were also recorded to confirm the binuclear structures. Studies were conducted to assess the growth inhibiting potential of the ligands and complexes against various fungal, viral and bacterial strains. Copyright © 2008 John Wiley & Sons, Ltd.

Characterization and genetic diversity of phytoplasmas associated with elephant foot yam (Amorphophallus paeoniifolius) in India.

Abstract: During the growing season of 2015 and 2016, leaf yellowing, stunting, and declining symptoms were observed on elephant foot yam in three states of India.The 1.3 kb 16S rDNA fragments were amplified from genomic DNA extracted from all the symptomatic elephant foot yam samples in nested PCR assays using primer pairs, P1/P7 followed by 3F/3R. Pair wise sequence comparison, virtual RFLP and phylogenetic analysis of 16S rRNA gene sequences confirmed association of ‘Candidatus Phytoplasma trifolii’ (16SrVI-D) and ‘Candidatus Phytoplasma oryzae’ (16SrXI-B) related strains in Uttar Pradesh, Uttarakhand and Tripura states, respectively. To our knowledge, this is the first report of association of ‘Ca. P. trifolii’ and ‘Ca. P. oryzae’ related strains in elephant foot yam in world. In the present study, we also reported Datura stramonium showing witches' broom as a natural weed host for ‘Ca. P. trifolii’ phytoplasma in Gorakhpur and Kushinagar districts of Uttar Pradesh state, India.

Controlled electrochemical synthesis of conductive nanopolypyrrole and its application in the design of a solid‐state ion sensor

Abstract: A polypyrrole (PPy) conductive polymer was electrochemically synthesized from pyrrole–cupric chloride (CuCl2)–H2O (system A) and pyrrole–CuCl2–sodium dodecyl sulfate–H2O (system B). Their morphologies and growth behavior were studied, and their aggregates were characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron spectroscopy, thermogravimetry, and Fourier transform infrared studies. The powder X-ray diffraction pattern showed only one peak characteristic of PPy. In system B, the dimensions of the fractal patterns were calculated and found to be very close to the theoretical value of diffusion-limited aggregation. Various morphological transitions were observed at different field intensities and CuCl2 concentrations. Transmission electron spectroscopy studies revealed the formation of nanosized spherical particles 5–10 nm in size. For system B, a potassium-ion-selective electrode was constructed on the basis of a dibenzo-18-crown-6 impregnated poly(vinyl chloride) matrix membrane over a synthesized polymer-modified electrode. The electrode showed Nernstian behavior with a slope of 57 mV; this revealed the potential application of the as-synthesized material in the design of a solid-state ion-selective electrode. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42729.

Molecular dynamics simulation study of DNA triplex formed by mixed sequences in solution.

Abstract: The unrestrained molecular dynamics simulation of the triple helical DNA with mix sequences d(GACTGGTGAC)•d(CTGACCACTG)*d (GACTGGTGAC), using the particle mesh Ewald sum, is presented here. The Ewald summation method effectively eliminates the usual “cut-off” of the long—range interactions and allowed us to evaluate the full effect of the electrostatic forces. The AMBER5.0 force field has been used during the simulation in solvent. The MD results support a dynamically stable model of DNA triplex over the entire length of the trajectory. The duplex structure assumes the conformation, which is very close to B-DNA. In mixed sequences the purine bases occurs in both strand of DNA duplex. The bases of third strand do not favor the Hoogsteen or/and reverse Hoogsteen type of Hydrogen bonding but they form hydrogen bonds with the bases of both the strand of DNA duplex. The orientation of the third strand is parallel to one of the strand of duplex and all nucleotides (C, A, G & T) show isomorphic behavior...