http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Pradeep Singh,Vikas Shrivastava,I. B. Singh,D. P. Mondal 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.6
Three group of porous Ti4Al4Co samples made of (i) unmilled powder and vacuum sintered (S1), (ii) milled powder andvacuum sintered (S2), and (iii) milled powder sintered in open atmosphere (S3) were prepared. Phase change, crystallite sizeand lattice strain variations due to powder milling and sintering were examined by SEM and XRD. To evaluate mechanicalproperty, alloy samples were subjected to the uniaxial compression test. For corrosion analysis, Tafel plot was plotted usingelectrochemical corrosion system in simulated body fluid (SBF) as electrolytic medium. From the obtained results, it wasfound that significant microstructural transformation takes place due to milling and change in sintering atmosphere. SampleS1possessed 139 MPa compressive strength, which was about 48% and 76% higher than samples S2and S3respectively. Corrosion current density for S3was found as 5.5 ± 0.3 μA/cm2 which is 7 and 12 times lower than S2and S1samples.
Munish Sood,Vikas Kulshrestha,Julie Sachdeva,Amresh Ghai,Ajaydeep Sud,Shalendra Singh 대한정형외과학회 2020 Clinics in Orthopedic Surgery Vol.12 No.4
In the article entitled “Poor Functional Outcome in Patients with Voluntary Knee Instability after Anterior Cruciate Ligament Reconstruction,”1) the name of one of the authors was incorrectly presented: Shalender Singh should read Shalendra Singh.
Vikas Kumar Singh,Priti Upadhyay,Pallavi Sinha,Ashish Kumar Mall,Ranjith K. Ellur,Atul Singh,Sanjay K.Jaiswal,Sunil Biradar,S. Ramakrishna,R.M. Sundaram,Ilyas Ahmed,B. C. Viraktamath,C. Kole,Sukhpal S 한국작물학회 2011 Journal of crop science and biotechnology Vol.14 No.1
A total of six TGMS (thermosensitive genic male sterile lines) and nine pollinator lines were subjected to molecular characterization using 48 genome-wide SSR (simple sequence repeat) markers. Cluster analysis revealed clear differentiation among the TGMS lines according to their source of origin. The SSR-based genetic distance between the hybrids of the parental lines ranged from 0.36to 0.79 suggesting a high degree of genetic divergence. Among a set of 54 hybrids generated using parental lines, 32 showed better parent heterosis (+21.7%) while 19 showed mid-parent heterosis (+15.0%). For the trait yield per plant genetic distance (GD) was negatively correlated with F1 performance (r = -0.202), mid-parent heterosis (r = -0.325*; P < 0.05), and better parent heterosis (r = -0.261), while it was positively correlated with specific combining ability (r = 0.042). Based on the grouped genetic distance (GGD),the hybrid combinations were divided into four groups. The GGD showed linear correlation with hybrid performance within the group (GGD = 40 - 50: r = -0.07; GGD = 70 - 80: r = 0.32). This information can be utilized in the development of higher yielding,two-line rice hybrids through selection of intermediately diverse parental lines using GGD.
Singh, Vikas Kumar,Upadhyay, Priti,Sinha, Pallavi,Mall, Ashish Kumar,Ellur, Ranjith K.,Singh, Atul,Jaiswal, Sanjay K.,Biradar, Sunil,Ramakrishna, S.,Sundaram, R.M.,Ahmed, Ilyas,Viraktamath, B.C.,Kole, 한국작물학회 2011 Journal of crop science and biotechnology Vol.14 No.1
A total of six TGMS (thermosensitive genic male sterile lines) and nine pollinator lines were subjected to molecular characterization using 48 genome-wide SSR (simple sequence repeat) markers. Cluster analysis revealed clear differentiation among the TGMS lines according to their source of origin. The SSR-based genetic distance between the hybrids of the parental lines ranged from 0.36 to 0.79 suggesting a high degree of genetic divergence. Among a set of 54 hybrids generated using parental lines, 32 showed better parent heterosis (+21.7%) while 19 showed mid-parent heterosis (+15.0%). For the trait yield per plant genetic distance (GD) was negatively correlated with $F_1$ performance (r = -0.202), mid-parent heterosis (r = $-0.325^*$; P < 0.05), and better parent heterosis (r = -0.261), while it was positively correlated with specific combining ability (r = 0.042). Based on the grouped genetic distance (GGD), the hybrid combinations were divided into four groups. The GGD showed linear correlation with hybrid performance within the group (GGD = 40 - 50: r = -0.07; GGD = 70 - 80: r = 0.32). This information can be utilized in the development of higher yielding, two-line rice hybrids through selection of intermediately diverse parental lines using GGD.
Green emitting Tb doped LiBaB<sub>9</sub>O<sub>15</sub> phosphors
Singh, Vijay,Shinde, K.N.,Singh, N.,Pathak, M.S.,Singh, Pramod K.,Dubey, Vikas Elsevier 2018 OPTIK -STUTTGART- Vol.156 No.-
<P><B>Abstract</B></P> <P>A successful preparation of a Tb<SUP>3+</SUP>-doped LiBaB<SUB>9</SUB>O<SUB>15</SUB> phosphors was achieved through the use of a solution-combustion method. The preparation of the powders of the Tb<SUP>3+</SUP>-doped LiBaB<SUB>9</SUB>O<SUB>15</SUB> phosphor was confirmed by X-ray diffraction (XRD) results; furthermore, the size and morphology of these powders were further examined using a scanning electron microscope (SEM). A study of the luminescent proprieties under a UV excitation showed a dominant and strong green luminescent peak at 542nm that is due to the d–f transition. When monitored at 542nm, the excitation spectrum exhibited a broad band centered at 230nm and several weak peaks in the wavelength range of 300–400nm that are attributed to the f-d transitions and the intra-4f-4f transitions of the Tb<SUP>3+</SUP> ions, respectively. The addition of the Tb<SUP>3+</SUP> concentration greatly improved the photoluminescent properties of the present phosphors, and the Commission International de I’Eclairage (CIE) chromaticity coordinates are located in the green region. The present study suggests that the potential applications of the Tb<SUP>3+</SUP>-doped LiBaB<SUB>9</SUB>O<SUB>15</SUB> phosphors might be in the lighting and display fields.</P>
UV emission from Gd<sup>3+</sup> ions in LaAl<sub>11</sub>O<sub>18</sub> phosphors
Singh, Vijay,Singh, N.,Pathak, M.S.,Watanabe, S.,Gundu Rao, T.K.,Singh, Pramod K.,Dubey, Vikas Elsevier 2018 Optik Vol.157 No.-
<P><B>Abstract</B></P> <P>Phosphors with the composition La<SUB>1-x</SUB>Gd<SUB>x</SUB>Al<SUB>11</SUB>O<SUB>18</SUB> (x = 0.01–0.10) were synthesized by combustion at a furnace temperature of 500 °C. The formation of the as-prepared combustion products was confirmed by X-ray diffraction analysis. On excitation with 273 nm, an emission band for the Gd<SUP>3+</SUP> ion was observed at 314 nm. This band progressively enhanced with increasing Gd<SUP>3+</SUP> concentration. The phosphor with low concentrations of Gd<SUP>3+</SUP> ions exhibits prominent ESR lines with <I>g</I> <SUB>eff</SUB> ∼ 1.9, 2.0, 4.7, and 5.9. With high dopant concentrations, the spectrum shows features similar to those of a U-spectrum with dominant lines with <I>g</I> <SUB>eff</SUB> ∼ 2.0, 2.9, 4.6, and 6.1. Low field lines arise from distortions in the immediate environment of the Gd<SUP>3+</SUP> ion.</P>
Singh, Vijay,Shinde, K.N.,Pathak, M.S.,Singh, N.,Dubey, Vikas,Singh, Pramod K.,Jirimali, H.D. Elsevier 2018 OPTIK -STUTTGART- Vol.164 No.-
<P><B>Abstract</B></P> <P>A series of Tb<SUP>3+</SUP>-doped CaLaAl<SUB>3</SUB>O<SUB>7</SUB> phosphors were successfully synthesized via a sol-gel method. The formation of the synthesized phosphors was confirmed using X-ray powder diffraction (XRPD) studies. A scanning electron microscope (SEM) was used to characterize the surface morphology and to investigate the photoluminescence behaviors in detail. Under the excitation of 235 nm, the emission spectrum consists of the characteristic Tb<SUP>3+</SUP> transitions that mainly peak at 543 nm and correspond to the <SUP>5</SUP>D<SUB>4</SUB> → <SUP>7</SUP>F<SUB>5</SUB> transition. The intensity was greatly improved due to the Tb<SUP>3+</SUP> concentration in the present phosphors. The optimum Tb<SUP>3+</SUP>-doping concentration was determined to be 0.05 mol. The chromaticity coordinates of the CaLaAl<SUB>3</SUB>O<SUB>7</SUB>:Tb<SUP>3+</SUP> were fixed to make it tunable for the blue-to-green region. The typical photographs of the CaLaAl<SUB>3</SUB>O<SUB>7</SUB>:Tb<SUP>3+</SUP> under a 254-nm UV light revealed an intense-green powder. The results showed that this kind of phosphor is potentially applicable in terms of UV-excited white LEDs.</P>
Singh, Vijay,Singh, N.,Dubey, Vikas,Singh, Pramod K.,Shinde, K.N.,Ravi Kanth Kumar, V.V. Elsevier 2018 OPTIK -STUTTGART- Vol.158 No.-
<P><B>Abstract</B></P> <P>Ce<SUP>3+</SUP>-doped CaAl<SUB>12</SUB>O<SUB>19</SUB> phosphors with different Ce<SUP>3+</SUP> contents, as well as those with Mg<SUP>2+</SUP> codoped powders, were successfully synthesized using a rapid combustion method (<5 min) for this paper. The powders were well characterized by the X-ray diffraction (XRD) and photoluminescence (PL) techniques. The emission measurements upon a UV-light excitation (262 nm) showed the emission characteristics of the Ce<SUP>3+</SUP> ion that are due to the 5d–4 f transitions. The emission and excitation spectra were recorded as the Ce<SUP>3+</SUP> concentration was kept constant and the Mg<SUP>2+</SUP> concentration was varied. It became evident that the addition of the Mg<SUP>2+</SUP> along with the Ce<SUP>3+</SUP> resulted in increases of the PL intensity, and the reasons for this behavior are discussed.</P>
Singh, Vijay,Singh, N.,Pathak, M.S.,Dubey, Vikas,Singh, Pramod K. Elsevier 2018 Optik Vol.155 No.-
<P><B>Abstract</B></P> <P>ZnAl<SUB>2</SUB>O<SUB>4</SUB> doped with varying concentrations of cerium phosphors were synthesized by combustion synthesis route. Two types of powder samples were examined: as-prepared and annealed at 800°C in air atmosphere. We investigated the structural, morphological and photoluminescence properties of cerium doped ZnAl<SUB>2</SUB>O<SUB>4</SUB> phosphors. Results of scanning electron microscopy, X-ray diffraction, photoluminescence investigations were presented.</P>
Singh, Vijay,Pathak, M.S.,Singh, N.,Dubey, Vikas,Singh, Pramod K. Elsevier 2018 Optik Vol.152 No.-
<P><B>Abstract</B></P> <P>LiAl<SUB>5</SUB>O<SUB>8</SUB> doped with varying concentrations of Ce<SUP>3+</SUP> were synthesized by a combustion route. Powder X-ray diffraction and scanning electron microscopy techniques were used to characterize the as-prepared and annealed phosphors. The luminescence intensity decreased after annealing the samples at 800°C for 2h in air. These results indicate the possibility of fabrication of high quality Ce<SUP>3+</SUP> doped LiAl<SUB>5</SUB>O<SUB>8</SUB> phosphor even at furnace temperature 500°C via a simple process.</P>