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Dubey Anil Kumar,Singh Sudhir 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.4
Puparia of Pealius kufriensis Dubey sp. nov. found infesting a native and highly invasive plant, Rubus ellipticus Sm. (Rosaceae) are described. The host shrub was found highly infested with the new whitefly on the underside of leaves. Puparial characteristics of the genus Pealius Quaintance and Baker shared with Aleyrodes Latreille and Bemisia Quaintance and Baker are discussed.
Smart Phone Applications as a Source of Information on Stroke
Divyanshu Dubey,Amod Amritphale,Anshudha Sawhney,Nupur Amritphale,Pradeep Dubey,Ambarish Pandey 대한뇌졸중학회 2014 Journal of stroke Vol.16 No.2
Background and Purpose: Smartphone applications have been increasingly identified as a novel platform for dissemination of healthcare related information. However, there have been no studies done to evaluate the availability and content of stroke related apps. Purpose: This study aims to identify and analyze stroke-related applications available on the Apple iTunes and Android Google Play Store. Methods: The Apple iTunes store and Android Google Play Store were searched for stroke-related applications on July 27, 2013 using keywords: stroke, brain attack, intracranial hem-orrhage, subarachnoid hemorrhage, cerebral infarction. The content of the applications was analyzed by two independent investigators. Results: A total of 93 relevant applications (46.2% android and 53.8% iPhone) were identified of which 47.3% were available free of cost. 92% of apps were identified as useful by users and over 60% had scientifically valid information. There is a significant participation of healthcare agencies in dissemination of stroke related information through apps with 47.3% apps being uploaded by them. Over half of all stroke related apps were aimed towards health care workers (51.6%), 75% of which could be utilized as bedside tools for patient care and remainder had information related to recent research advances. The difference in scientific validity between the apps aimed at general population versus healthcare professionals was statistically significant (P<0.01). There was no statistical association between cost of app and scientific validity or usefulness. Conclusions: Smartphone apps are a significant source of information related to stroke. An increasing participation of healthcare agencies should be encouraged to promote dissemination of scientifically valid information.
Dubey, Rashmi,Tewari, Ashish K.,Ravikumar, K.,Sridhar, B. Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.5
Evidences have proved the versatile role of sulfur atom in supramolecular chemistry. $^1$Presence of S atom in the molecule usually results in the specific structural properties of molecules. In the present study, $S{\cdots}arene$, $N{\cdots}arene$, $CH{\cdots}{\pi}$, $CH{\cdots}S$ and $CH{\cdots}N$ type of weak interactions stabilize the conformation and self assembly of symmetrical as well as dissymmetrical molecules.
GENERALIZED COMMON FIXED POINT RESULTS FOR THREE SELF-MAPPINGS IN COMPLEX VALUED b-METRIC SPACES
Dubey Anil Kumar,Mishra Urmila,Lim W. H. 경남대학교 기초과학연구소 2019 Nonlinear Functional Analysis and Applications Vol.24 No.2
In this paper, some generalized common fixed point results have been proved for three self maps in the context of complex valued b-metric spaces. Our results substantially improve and generalize a number of known results.
Dubey Anil Kumar,Mishra Urmila,Lim Won Hee 경남대학교 기초과학연구소 2019 Nonlinear Functional Analysis and Applications Vol.24 No.3
In this paper, we present some fixed point theorems for generalized contractions involving rational expressions in the framework of complex valued $b$-metric spaces. Our results generalize some existing results.
Dubey, Saurabh,Beotra, Alka Korean Society for Mass Spectrometry 2017 Mass spectrometry letters Vol.8 No.4
Androgenic anabolic steroids (AASs) are synthetic derivatives of testosterone with a common structure containing cyclopentanoperhydrophenanthrene nucleus. Their use enhances the muscle building capacity and is beneficial during performance. The AASs are one of the most abused group of substances in horse doping. Liquid chromatography tandem mass spectrometry ($LC/MS^n$) has been successfully applied to the detection of anabolic steroids in biological samples. However, the saturated hydroxysteroids viz: nandrolone, $5{\alpha}-estrane-3{\beta}$, $17{\alpha}-diol$ exhibit lower detection responses in electrospray ionisation (ESI) because of their poor ionisation efficiency. To overcome this limitation pre-column chemical derivatization has been introduced to enhance their detection responses in $LC-ESI-MS^n$ analysis. The aim of present study was to develop a sensitive method for identification and confirmation of nandrolone and its metabolite in horse urine incorporating pre-column derivatization using picolinic acid. The method consists of extraction of targeted steroid conjugates by solid phase extraction (SPE). The eluted steroid conjugates were hydrolysed by methanolysis and free steroids were recovered with liquid-liquid extraction. The resulting steroids were derivatized to form picolinoyl esters and identification was done using LC-ESI-MS/MS in positive ionization mode. The picolinated steroid adduct enhanced the detection levels in comparison to underivatized steroids.
Dubey, Avanish Kumar,Yadava, Vinod Korean Society for Precision Engineering 2007 International Journal of Precision Engineering and Vol.8 No.4
Taguchi methods have been used for a long time to improve the product quality and process performance of a manufacturing system, Few researchers have applied this methodology in laser beam cutting (LBC) of sheet metals and found the considerable improvement in cut qualities. In all experimental investigations of LBC so far, the objective was to optimize the single quality characteristic at a time. In this paper the simultaneous optimization of multiple quality characteristics such as Kerf width and material removal rate (MRR) during pulsed Nd:YAG LBC of thin sheet of magnetic material (high Silicon-steel) has been presented using Taguchi's quality loss function. The results show the considerable improvement in multiple S/N ratio as compared to initial cutting condition. Also, the comparison of results from single and multi-objective optimization have been presented and it was found that the loss in quality is always possible shifting from single quality to multiple quality optimization.
Dubey, Prashant,Choi, Sang Kyu,Choi, Ji Hoon,Shin, Dong Hoon,Lee, Cheol Jin American Scientific Publishers 2010 Journal of nanoscience and nanotechnology Vol.10 No.6
<P>We synthesized thin-multiwalled carbon nanotubes (t-MWCNTs) using Fe-Mo/MgO catalyst by citrate precursor method based on a simple sol-gel technique. Synthesis of high-quality t-MWCNTs with uniform diameters was achieved in large-scale by catalytic decomposition of methane over Fe-Mo/MgO catalyst prepared under Ar-atmosphere. The produced t-MWCNTs had the outer diameters in the range of 4-8 nm, with a Gaussian average diameter of 6.6 +/- 0.1 nm and wall numbers in the range of of 4-7 graphenes. The product yield of the as-synthesized t-MWCNTs was over 450% relative to the used Fe-Mo/MgO catalyst, and TGA showed purity about 85%. The t-MWCNTs showed the low turn-on field about 1.24 V/microm, corresponding to the current density of 0.1 microA/cm2, and the high emission Current density of 10 mA/cm2 at the applied electric field of 2.6 V/microm. The t-MWCNTs indicate good emission stability without any fluctuation of emission current through a lifetime measurement for 20 h. It was confirmed that the field emission performance of t-MWCNTs was similar to DWCNTs and the field emission stability of t-MWCNTs was similar to MWCNTs.</P>
Dubey, S.P.,Nguyen, T.T.M.,Kwon, Y.N.,Lee, C. Korean Society of Industrial and Engineering Chemi 2015 Journal of industrial and engineering chemistry Vol.29 No.-
The aim of the present study is to synthesize dispersible reduced graphene oxide (RGO) via functionalization with metals and metal oxides and explore their potential applications in water purification. Graphene-based metal and metal oxide composites were synthesized hydrothermally using sodium borohydride as a reducing agent and sodium sorbate as a stabilizer. Single (Ag, Cu<SUB>2</SUB>O, and Fe<SUB>3</SUB>O<SUB>4</SUB>) and bimetallic (Ag-Cu<SUB>2</SUB>O, Ag-Fe<SUB>3</SUB>O<SUB>4</SUB>, and Cu<SUB>2</SUB>O-Fe<SUB>3</SUB>O<SUB>4</SUB>) nanoparticles were incorporated on the surface of RGO. The synthesized composites were characterized by various analytical methods. The inactivation of E. coli, the catalytic degradation of 4-nitrophenol, and the adsorption of As(V) were examined using the RGO composites.