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Bukke, Ravindra Naik,Avis, Christophe,Naik, Mude Narendra,Jang, Jin IEEE 2018 IEEE electron device letters Vol.39 No.3
<P>We report the effect of purification of ZrO<SUB>x</SUB> precursor on the performance of solution processed amorphous indium–zinc–tin oxide thin-film transistors with a ZrO<SUB>x</SUB> gate insulator, which is processed at the maximum temperature of 300 °C in air. By purification, the saturation mobility ( <TEX>$\mu _{\textit {sat}}$</TEX>) increases from 2.45 ± 0.83 to 15.42 ± 4.01 cm<SUP>2</SUP>V<SUP>−1</SUP>s<SUP>−1</SUP>, subthreshold swing decreases from 141.44 ± 14.08 to 87.90 ± 11.05 mV/decade and drain current ON/OFF ratio increases from ~10<SUP>7</SUP> to ~10<SUP>9</SUP>. The leakage currents are remarkably reduced by using purified ZrO<SUB>x</SUB> as a gate insulator. The improvement is mainly due to the reduced impurities and less oxygen vacancies in ZrO<SUB>x</SUB>.</P>
Independent isomeric yield ratios of 95m,gNb in the natMo(γ, pxn) and natZr(p, xn) reactions
Naik, Haladhara,Kim, Guinyun,Kim, Kwangsoo,Zaman, Muhammad,Yang, Sung-Chul,Sahid, Muhammad,Lee, Manwoo,Shin, Sung-Gyun,Goswami, Ashok,Cho, Moo-Hyun Springer-Verlag 2014 JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY Vol.300 No.3
Naik, Gautam Kumar,Majhi, Sanjit Manohar,Jeong, Kwang-Un,Lee, In-Hwan,Yu, Yeon Tae Elsevier 2019 JOURNAL OF ALLOYS AND COMPOUNDS Vol.771 No.-
<P><B>Abstract</B></P> <P>The current study concerns about the large band gap of TiO<SUB>2</SUB> for its use as photocatalysts. The photocatalytic activity of core-shell structured Au@TiO<SUB>2</SUB> nanoparticles were enhanced by the doping of nitrogen. The nitrogen doping has been done by simple hydrothermal method taking ethylenediamine as the precursor for nitrogen. The crystals structure of TiO<SUB>2</SUB> shell remained unaltered even with the introduction of nitrogen. The photocatalytic activity of the prepared samples were evaluated towards the hydrogen evolution from photocatalytic water splitting under solar light irradiation. It was found that nitrogen doped core-shell structured Au@TiO<SUB>2</SUB> nanoparticles (Au@N-TiO<SUB>2</SUB>) showed higher photocatalytic activity with an average H<SUB>2</SUB> evolution rate of 4880 μmol h<SUP>−1</SUP>g<SUP>−1</SUP>, which is 3.79 times more than that of bare TiO<SUB>2</SUB> in 4 h under xenon light irradiation. The relationship among the other samples was in order of Au@N-TiO<SUB>2</SUB> > Au@TiO<SUB>2</SUB> > N-TiO<SUB>2</SUB> > TiO<SUB>2</SUB>. This enhanced photocatalytic activity of Au@N-TiO<SUB>2</SUB> can be responsible for the formation of an plasmonic photocatalyst and the formation of an impurity band between the conduction band (CB) and the valence band (VB) of TiO<SUB>2</SUB>.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Nitrogen (N) was doped on the core-shell structured Au@TiO<SUB>2</SUB> nanoparticles. </LI> <LI> N was doped via a low temperature microwave assisted hydrothermal process. </LI> <LI> N doped Au@TiO<SUB>2</SUB> core-shell are highly absorbed in whole of the solar spectrum. </LI> <LI> There was no morphological distortion during N doping. </LI> <LI> Synthesized catalysts are highly efficient for photocatalytic hydrogen evolution. </LI> </UL> </P>
Efficacy of Pesticides and Growth Hormones against Root Disease Complex of Mulberry (Morus alba L.)
Naik, Vorkady Nishitha,Sharma, Dinesh Dutta Korean Society of Sericultural Science 2007 International Journal of Industrial Entomology Vol.15 No.2
During mulberry cultivation, root disease complex caused by the association of root knot nematode (Meloidogyne incognita) with root rot pathogens like Fusarium solani and Botryodiplodia theobromae poses serious loss in leaf production. Therefore, an attempt was made to assess the efficacy of eight pesticides (Metayalaxyl+Mancozeb, Thiophanate methyl, Mancozeb, Bitertanol, Phenomiphos, Phorate, Thionazin & Carbofuran) and two growth hormones (Salicylic acid and Indole 3 acetic acid) at 0.1 and 0.2% concentrations under in vitro conditions against nematode (hatching of eggs and mortality of larvae) and root rot pathogens (poisoned food technique) for short listing the treatments to develop an IDM strategy. Results revealed that among the pesticides and growth hormones, Carbofuran followed by Salicylic acid were found to be effective at 0.2% concentration against both nematode and pathogenic fungi. Both the chemicals inhibited the hatching of nematode eggs by 83.5-78.9% and 80-76% larval mortality over the control and reduced the mycelial growth of both the pathogenic fungi to an extent of 75.5-77.8%. Though Mancozeb inhibited both the pathogenic fungi strongly (77-80%), it did not show any effectiveness against nematode. The rest of the chemicals were found either moderately or poorly effective in reducing the growth of pathogenic fungi, hatching of nematode eggs and enhancing the mortality of larvae. The two effective chemicals viz., Carbofuran and Salicylic acid, which rated as strong inhibitors against both nematode and pathogenic fungi, can be exploited in developing an IDM package as one of the component for better management of root disease complex in mulberry.
Naik, H.,Kim, G.,Kim, K.,Zaman, M.,Goswami, A.,Lee, M.W.,Yang, S.C.,Lee, Y.O.,Shin, S.G.,Cho, M.H. North Holland Pub. Co 2016 Nuclear physics. A Vol.948 No.-
<P>Photo-neutron cross sections of Au-197 were experimentally determined for the bremsstrahlung end-point energies of 50, 60, and 70 MeV, by utilizing activation and off-line gamma-ray spectrometric technique, using the 100 MeV electron linac at the Pohang Accelerator Laboratory (PAL), Pohang, Korea. The Au-197(gamma, xn; x = 1-6) reaction cross sections were calculated as a function of the bombarding photon energy by using the TALYS 1.6 computer code with default parameters. The flux-weighted average cross sections were obtained from the literature data and the theoretical values of TALYS 1.6 and TENDL-2014, for mono-energetic photons, and are found to be in good agreement with the present data. Isomeric yield ratios of (196m2,g)AU from the Au-197(gamma, n) reaction were also determined for the bremsstrahlung end-point energies of 50, 60, and 70 MeV, from the reaction cross sections of m2- and g-states, based on the present experimental data, and are found to be in good agreement with the theoretical values based on TALYS 1.6 and TENDL-2014. (C) 2016 Elsevier B.V. All rights reserved.</P>
Naik, Rahul Gaybarao,Dodamani, Arun Suresh,Khairnar, Mahesh Ravindra,Jadhav, Harish Chaitram,Deshmukh, Manjiri Abhay The Korean Academy of Conservative Dentistry 2016 Restorative Dentistry & Endodontics Vol.41 No.4
Objectives: Glass ionomer cements (GICs), which are biocompatible and adhesive to the tooth surface, are widely used nowadays for tooth restoration. They inhibit the demineralization and promote the remineralization of the tooth structure adjacent to the restoration, as well as interfere with bacterial growth. Hence, the present study was conducted to assess and compare the antimicrobial activity of three commercially available GICs against two cariogenic bacteria. Materials and Methods: An agar plate diffusion test was used for evaluating the antimicrobial effect of three different GICs (Fuji IX, Ketac Molar, and d-tech) on Streptococcus mutans (S. mutans) and Lactobacillus acidophilus (L. acidophilus). Thirty plates were prepared and divided into two groups. The first group was inoculated with S. mutans, and the second group was inoculated with L. acidophilus. These plates were then incubated at $37^{\circ}C$ for 24 hours. Zones of bacterial growth inhibition that formed around each well were recorded in millimeters (mm). Results: The zones of inhibition for Fuji IX, Ketac Molar, and d-tech on S. mutans were found to be $10.84{\pm}0.22mm$, $10.23{\pm}0.15mm$, and $15.65{\pm}0.31mm$, respectively, whereas those for L. acidophilus were found to be $10.43{\pm}0.12mm$, $10.16{\pm}0.11mm$, and $15.57{\pm}0.13mm$, respectively. Conclusions: D-tech cement performed better in terms of the zone of bacterial inhibition against the two test bacteria, than the other two tested glass ionomers.
Naik, Haladhara,Kim, Guinyun,Kim, Kwangsoo,Zaman, Muhammad,Shahid, Muhammad,Kang, Yeong-Rok,Woo Lee, Man,Shin, Sung-Gyun,Cho, Moo-Hyun Springer-Verlag 2016 European Physical Journal A Vol.52 No.11
<P>The flux-weighted average cross-sections of the Pb-nat(gamma, xn)Pb198-204 reaction for the bremsstrahlung end-point energies of 50-70 MeV were determined by activation and off-line gamma-ray spectrometric technique, using the 100 MeV electron linac at the Pohang Accelerator Laboratory (PAL), Korea. The relative cross-sections of the Pb-208(gamma, xn)Pb202-204 and Bi-209(gamma, xn)Bi203-206 reactions from our earlier work were updated to absolute values and compared with the present data. The photo-neutron cross-sections of Pb-nat, Pb-208, and Bi-209 were also calculated, as a function of the photon energy using the TALYS 1.6 code. The flux-weighted average cross-sections were obtained from the theoretical values of the TALYS 1.6 code, based on mono-energetic photons, and compared with the present experimental data. The values were found to be in good agreement with the present data for the Bi-209(gamma, xn)Bi203-206, Pb-208(gamma, xn)Pb202-204, and Pb-nat(gamma, xn)Pb198-202 reactions. However, the present data for the Pb-nat(gamma, xn)Pb-203,Pb-204 reactions were higher than the flux-weighted values obtained using the TALYS 1.6 code.</P>