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Tailored lysozyme–ZnO nanoparticle conjugates as nanoantibiotics
Tripathy, Nirmalya,Ahmad, Rafiq,Bang, Seung Hyuck,Min, Jiho,Hahn, Yoon-Bong The Royal Society of Chemistry 2014 Chemical communications Vol.50 No.66
<P>Covalently attached lysozyme–ZnO nanoparticle (L–ZNP) conjugates were synthesized by a low temperature solution route. Tailored L–ZNP conjugates exhibit pronounced antibacterial features against <I>Escherichia coli</I> (<I>E. coli</I>) and <I>Staphylococcus aureus</I> (<I>S. aureus</I>).</P> <P>Graphic Abstract</P><P>Covalently attached lysozyme–ZnO nanoparticle conjugates exhibit pronounced antibacterial features against <I>Escherichia coli</I> and <I>Staphylococcus aureus</I>. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4cc03712j'> </P>
Lacunary I-Convergent Sequences
Tripathy, Binod Chandra,Hazarika, Bipan,Choudhary, Bisweshwar Department of Mathematics 2012 Kyungpook mathematical journal Vol.52 No.4
In this article we introduce the concepts of lacunary I-convergent sequences. We investigate its different properties like solid, symmetric, convergence free etc.
Tripathy, Binod Chandra,Baruah, Achyutanada Department of Mathematics 2010 Kyungpook mathematical journal Vol.50 No.4
In this paper we introduce the concept of lacunary statistical and lacunary strongly convergence of generalized difference sequence of fuzzy real numbers. We prove some inclusion relations and also study some of their properties.
Tripathy A.,Bhuyan Satyanarayan,Das S. N.,Choudhary R. N. P. 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.2
A double perovskite ceramic electronic sample of Bi2MnFeO6 has been formulated and synthesized using an ordinary solid-state sintering route from the metal oxides of bismuth, manganese, and iron. The crystallographic structure, morphological, dielectric, electrical, and current–voltage parameters have been analyzed for the fabricated sample. Room temperature XRD (X-ray diffraction) investigation confirms the monoclinic phase. The microstructure obtained from scanning electron microscope reveals compact grain structures with little or no voids. The impedance as well as its electrical properties have been appraised through the impedance analyzer (LCR meter) for a wide range of temperatures and frequencies (30–230 °C and 1 kHz–1 MHz). The negative temperature coefficient of the material is derived from the impedance analysis. The non-ohmic behavior of the sample was confirmed by the current versus voltage (V–I) characteristic of the sample. Most of the significant physical and chemical properties linked with this compound may be critical in the development of future peer group electrical and electronic devices.
Tripathy, Binod Chandra,Borgohain, Stuti Department of Mathematics 2013 Kyungpook mathematical journal Vol.53 No.3
The sequence space $m(M,{\phi})^F$ of fuzzy real numbers is introduced. Some properties of this sequence space like solidness, symmetricity, convergence-free etc. are studied. We obtain some inclusion relations involving this sequence space.
The Spectrum of the Opertator D(r, 0, 0, s) over the Sequence Spaces c<sub>0</sub> and c
Tripathy, Binod Chandra,Paul, Avinoy Department of Mathematics 2013 Kyungpook mathematical journal Vol.53 No.2
In this paper we have examined the spectra of the operator D($r$, 0, 0, $s$) on sequence spaces $c_0$ and $c$.
Sequence Spaces of Fuzzy Real Numbers Using Fuzzy Metric
Tripathy, Binod Chandra,Borgohain, Stuti Department of Mathematics 2014 Kyungpook mathematical journal Vol.54 No.1
The sequence spaces $c^F$(M), $c^F_0$(M) and ${\ell}^F$(M) of fuzzy real numbers with fuzzy metric are introduced. Some properties of these sequence spaces like solidness, symmetricity, convergence-free etc. are studied. We obtain some inclusion relations involving these sequence spaces.
Time-Dependent Controlof Hole-Opening Degree of Porous ZnO Hollow Microspheres
Tripathy, Nirmalya,Ahmad, Rafiq,Jeong, Han-Sol,Hahn, Yoon-Bong American ChemicalSociety 2012 Inorganic Chemistry Vol.51 No.2
<P>Well-designed, monodispersed porous ZnO hollow microsphereswithcontrolled hole-opening were successfully synthesized by a faciletwo-step solution route at low temperature. The hollow microsphereshaving average diameter of 3–4 μm showed time-dependenthole-opening, i.e. 4–100% for 15–75 min. The hole-openingpercentage increases linearly with time until complete opening. TheZnO hollow microspheres also exhibited a high surface area (34 m<SUP>2</SUP> g<SUP>–1</SUP>), a large pore volume (0.19 cm<SUP>3</SUP> g<SUP>–1</SUP>) and an average pore diameter of 3.8nm. A plausible growth mechanism for the formation of ZnO hollow microsphereswas also proposed.</P><P>Well-designed, monodispersed porous ZnOhollow microsphereswith controlled hole-opening were synthesized by a facile low temperature,two-step solution route. The hollow microspheres having average diameterof 3−4 μm showed time-dependent hole-opening. The hole-openingpercentage increases linearly with time until complete opening. TheZnO hollow microspheres also exhibited high surface area, large porevolume and average pore diameter of 3.8 nm. A plausible growth mechanismfor the formation of ZnO hollow microspheres was also proposed.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/inocaj/2012/inocaj.2012.51.issue-2/ic2022598/production/images/medium/ic-2011-022598_0005.gif'></P>
Enhanced anticancer potency using an acid-responsive ZnO-incorporated liposomal drug-delivery system
Tripathy, Nirmalya,Ahmad, Rafiq,Ko, Hyun Ah,Khang, Gilson,Hahn, Yoon-Bong The Royal Society of Chemistry 2015 Nanoscale Vol.7 No.9
<P>The development of stimuli-responsive nanocarriers is becoming important in chemotherapy. Liposomes, with an appropriate triggering mechanism, can efficiently deliver their encapsulated cargo in a controlled manner. We explored the use of acid-sensitive zinc oxide nanoparticles (ZNPs) as modulators of the responsive properties of liposomes. Nanocomplexes formed by the incorporation of ZNPs in liposomes (ZNP-liposomes) were designed to demonstrate the pH-responsive release of a drug (daunorubicin) without premature drug leakage and with the maintenance of the relevant therapeutic concentrations. The nanocomplexes were spherical in shape with a narrow size distribution and showed a high drug-encapsulating efficiency. Under acidic conditions, the ZNP-liposome nanocomplexes released the loaded drug more rapidly than bare liposomes. Using flow cytometry, confocal microscopy and an MTT assay, we demonstrated that these nanocomplexes were readily taken up by cancer cells, resulting in significantly enhanced cytotoxicity. On exposure to the acidic conditions inside cancer cells, the ZNPs rapidly decomposed, releasing the entrapped drug molecules from the ZNP-liposome nanocomplexes, producing widespread cytotoxic effects. The incorporated ZNPs were multimodal in that they not only resulted in a pH-responsive drug-delivery system, but they also had a synergistic chemo-photodynamic anticancer action. This design provides a significant step towards the development of multimodal liposome structures.</P>