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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 ratio of 89m,gNb from 93Nb(γ, 4n), natZr(p, xn), and 89Y(α, 4n) reactions
Naik, Haladhara,Goswami, Ashok,Kim, Guinyun,Kim, Kwangsoo,Yang, Sung-Chul,Sahid, Muhammad,Zaman, Muhammad,Lee, Manwoo,Shin, Sung-Gyun,Cho, Moo-Hyun Springer-Verlag 2014 Journal of radioanalytical and nuclear chemistry Vol.299 No.3
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, Ravi,Obiang-Obounou, Brice W,Kim, Minkyoung,Choi, Yongseok,Lee, Hyun Sun,Lee, Kyeong Wiley-VCH 2014 CHEMMEDCHEM Vol.9 No.11
<P>Metabolic diseases such as atherogenic dyslipidemia, hepatic steatosis, obesity, and type II diabetes are emerging as major global health problems. Acyl-CoA:diacylglycerol acyltransferase (DGAT) is responsible for catalyzing the final reaction in the glycerol phosphate pathway of triglycerol synthesis. It has two isoforms, DGAT-1 and DGAT-2, which are widely expressed and present in white adipose tissue. DGAT-1 is most highly expressed in the small intestine, whereas DGAT-2 is primarily expressed in the liver. Therefore, the selective inhibition of DGAT-1 has become an attractive target with growing potential for the treatment of obesity and type II diabetes. Furthermore, DGAT-2 has been suggested as a new target for the treatment of DGAT-2-related liver diseases including hepatic steatosis, hepatic injury, and fibrosis. In view the discovery of drugs that target DGAT, herein we attempt to provide insight into the scope and further reasons for optimization of DGAT inhibitors.</P>
An Investigation of the Learning Styles of South Korean Business Students
Naik, Bijayananda,Girish, V.G. KNU The Institute of Management Economy Research 2012 Asia-Pacific Journal of Business Vol.3 No.1
The Index of Learning Styles (ILS) instrument based on the Felder-Silverman Learning Style Model was used to determine distribution of learning styles of 125 South Korean business students enrolled in a South Korean institution of higher education. Results show that greater proportion of South Korean business students surveyed in this study prefer sensing over intuitive, visual over verbal, reflective over active, and global over sequential learning styles. The majority of business students have a balanced learning style in all four dimensions of the Felder-Silverman model. Among the students that do not have a balanced learning style, students with sensing, visual, reflective, and global learning styles dominate. Gender difference in learning style preference was not statistically significant for any of the four dimensions.
Estimation of Ground and Excited State Dipole Moments of Coumarin 450 by Solvatochromic Shift Method
Naik, L.R.,Math, N.N. Korean Society of Photoscience 2005 Journal of Photosciences Vol.12 No.2
The ground and excited state dipole moments of Coumarin 450 (C 450) laser dye were measured at room temperature in several solvents of varying dipole moments. The ground state dipole moment (${\mu}_g$) is estimated by using the modified Onsagar model and the excited state dipole moments (${\mu}_e$) were estimated by the method of solvatochromism as well as by utilizing the microscopic solvent polarity parameter ($E^N_T$). Further, the deviation of some of the points from the linearity of the $E^N_T$ versus Stokes shift indicates the existence of specific type of solute-solvent interaction. The excited state dipole moment of C 450 were found to be higher than those of the ground state and is interpreted in terms of the resonance structure of the molecule. A reasonable agreement has been observed between the values obtained by the method of solvatochromism and modified Onsagar model. It is observed that, corresponding to cyclohexane solution, the fluorescence maxima shift towards the red region with increasing the polarity of the solvents, hence the transition involved are of ${\pi}-{\pi}^*$ type.