Full Text Journal Articles by
Author S Vijay Kumar

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Acute changes in ganglion cell layer thickness in ischemic optic neuropathy compared to optic neuritis using optical coherence tomography.

Peter W MacIntosh, S Vijay Kumar, V R Saravanan, Virna M Shah,

AIM:To elucidate the changes of different ganglion cell layer (GCL) thinning patterns between the optic neuritis (ON) and non-arteritic anterior ischemic optic neuropathy (NAION). METHODS:A prospective, observational study was conducted to evaluate the timing of GCL changes between acute ON and NAION using optical coherence tomography. RESULTS:Thinning on optical coherence ... Read more >>

Int J Ophthalmol (International journal of ophthalmology)
[2020, 13(1):120-123]

Cited: 0 times

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Relationship between Dental Caries Experience and Social Capital among Children - A Pilot Study.

Yeturu Sravan Kumar, P S Rakesh, Pentapati Kalyana-Chakravarthy, S Vijay Kumar,

Background:The effect of larger and distal environmental and societal factors on oral health is established and the concept of social capital (SC) is gaining importance. Aim:The aim of the study is to evaluate the association of dental caries (DC) experience of children with parental social SC. Methods:A cross-sectional survey was ... Read more >>

Indian J Community Med (Indian journal of community medicine : official publication of Indian Association of Preventive & Social Medicine)
[2019, 44(Suppl 1):S3-S6]

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Delivering an Integrated Package of Maternal Nutrition Services in Andhra Pradesh and Telangana (India).

Vani Sethi, Khyati Tiwari, Neha Sareen, Suneeta Singh, Chittaranjan Mishra, M Jagadeeshwar, K Sunitha, S Vijay Kumar, Arjan de Wagt, H P S Sachdev,

BACKGROUND:Maternal spot feeding programs operational in southern Indian States are providing a package of nutrition services (food, micronutrient supplementation, deworming, gestation weight gain monitoring, and fortnightly nutrition health education) to pregnant women. These remain to be evaluated. OBJECTIVE:We evaluated the maternal spot feeding programs in 2 Southern Indian states. METHODS:Study ... Read more >>

Food Nutr Bull (Food and nutrition bulletin)
[2019, 40(3):393-408]

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Electrocardiogram-guided Technique: An Alternative Method for Confirming Central Venous Catheter Tip Placement.

Arun Kumar Krishnan, Priya Menon, K P Gireesh Kumar, T P Sreekrishnan, Manish Garg, S Vijay Kumar,

Background:The current standard followed for assessing central venous catheter (CVC) tip placement location is through radiological confirmation using chest X-ray (CXR). Placement of CVCs under electrocardiogram (ECG) guidance may save cost and time compared to CXR. Objective:The objective of this study is to compare the accurate placement of the CVC ... Read more >>

J Emerg Trauma Shock (Journal of emergencies, trauma, and shock)
[2018, 11(4):276-281]

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Genetic relatedness of indigenous ethnic groups in northern Borneo to neighboring populations from Southeast Asia, as inferred from genome-wide SNP data.

Chee Wei Yew, Mohd Zahirul Hoque, Jacqueline Pugh-Kitingan, Alexander Minsong, Christopher Lok Yung Voo, Julian Ransangan, Sophia Tiek Ying Lau, Xu Wang, Woei Yuh Saw, Rick Twee-Hee Ong, Yik-Ying Teo, Shuhua Xu, Boon-Peng Hoh, Maude E Phipps, S Vijay Kumar,

The region of northern Borneo is home to the current state of Sabah, Malaysia. It is located closest to the southern Philippine islands and may have served as a viaduct for ancient human migration onto or off of Borneo Island. In this study, five indigenous ethnic groups from Sabah were ... Read more >>

Ann. Hum. Genet. (Annals of human genetics)
[2018, 82(4):216-226]

Cited: 1 time

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Synthesis of N-(Hetero)aryl Carbamates via CuI/MNAO Catalyzed Cross-Coupling of (Hetero)aryl Halides with Potassium Cyanate in Alcohols.

S Vijay Kumar, Dawei Ma,

An efficient route to N-(hetero)aryl carbamates was developed through CuI/MNAO [2-((2-methylnaphthalen-1-yl)amino)-2-oxoacetic acid] catalyzed cross-coupling of (hetero)aryl chlorides with potassium cyanate in alcohols at 120-130 °C. This method utilizes broadly available substrates to afford various N-(hetero)aryl carbamates in good to excellent yields. Moreover, (hetero)aryl bromides and (hetero)aryl iodides were also reacted ... Read more >>

J. Org. Chem. (The Journal of organic chemistry)
[2018, 83(5):2706-2713]

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N,N'-Bisoxalamides Enhance the Catalytic Activity in Cu-Catalyzed Coupling of (Hetero)Aryl Bromides with Anilines and Secondary Amines.

Subhajit Bhunia, S Vijay Kumar, Dawei Ma,

N,N'-Bis(furan-2-ylmethyl)oxalamide (BFMO), an inexpensive and conveniently available bidentate ligand, is very effective for promoting Cu-catalyzed N-arylation of anilines and cyclic secondary amines. The method enables coupling of a broad range of (hetero)aryl bromides with various (hetero)aryl amines and cyclic secondary amines at 0.5-5 mol % catalyst loadings at relatively low ... Read more >>

J. Org. Chem. (The Journal of organic chemistry)
[2017, 82(23):12603-12612]

Cited: 0 times

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Selected Copper-Based Reactions for C-N, C-O, C-S, and C-C Bond Formation.

Subhajit Bhunia, Govind Goroba Pawar, S Vijay Kumar, Yongwen Jiang, Dawei Ma,

Metal-catalyzed cross-coupling reactions belong to the most important transformations in organic synthesis. Copper catalysis has received great attention owing to the low toxicity and low cost of copper. However, traditional Ullmann-type couplings suffer from limited substrate scopes and harsh reaction conditions. The introduction of several bidentate ligands, such as amino ... Read more >>

Angew. Chem. Int. Ed. Engl. (Angewandte Chemie (International ed. in English))
[2017, 56(51):16136-16179]

Cited: 17 times

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Consolidated Checklist of Hard Corals of the Genus Acropora Oken, 1815 (Scleractinia: Acroporidae) in North Borneo, East Malaysia.

Rolando Robert, Dexter Jiunn Herng Lee, Kenneth Francis Rodrigues, Muhammad Ali Syed Hussein, Zarinah Waheed, S Vijay Kumar,

Acropora is the most biologically diverse group of reef-building coral, and its richness peaks at the Indo-Malay-Philippine Archipelago, the centre of global coral reef biodiversity. In this paper, we describe the species richness of Acropora fauna of North Borneo, East Malaysia, based on review of literature and as corroborated by ... Read more >>

Zootaxa (Zootaxa)
[2016, 4200(2):zootaxa.4200.2.2]

Cited: 1 time

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The draft genome of MD-2 pineapple using hybrid error correction of long reads.

Raimi M Redwan, Akzam Saidin, S Vijay Kumar,

The introduction of the elite pineapple variety, MD-2, has caused a significant market shift in the pineapple industry. Better productivity, overall increased in fruit quality and taste, resilience to chilled storage and resistance to internal browning are among the key advantages of the MD-2 as compared with its previous predecessor, ... Read more >>

DNA Res. (DNA research : an international journal for rapid publication of reports on genes and genomes)
[2016, 23(5):427-439]

Cited: 2 times

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Multiblock Copolymer Grafting for Butanol Biofuel Recovery by a Sustainable Membrane Process.

Shankarayya Vijay Kumar, Carole Arnal-Herault, Miao Wang, Jérôme Babin, Anne Jonquieres,

Biobutanol is an attractive renewable biofuel mainly obtained by the acetone-butanol-ethanol (ABE) fermentation process. Nevertheless, the alcohol concentration has to be limited to a maximum of 2 wt % in ABE fermentation broths to avoid butanol toxicity to the microorganisms. The pervaporation (PV) membrane process is a key sustainable technology ... Read more >>

ACS Appl Mater Interfaces (ACS applied materials & interfaces)
[2016, 8(25):16262-16272]

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Development of Gene-Pyramid Lines of the Elite Restorer Line, RPHR-1005 Possessing Durable Bacterial Blight and Blast Resistance.

V Abhilash Kumar, C H Balachiranjeevi, S Bhaskar Naik, R Rambabu, G Rekha, G Harika, S K Hajira, K Pranathi, M Anila, M Kousik, S Vijay Kumar, A Yugander, J Aruna, T Dilip Kumar, K Vijaya Sudhakara Rao, A S Hari Prasad, M S Madhav, G S Laha, S M Balachandran, M S Prasad, B C Viraktamath, V Ravindra Babu, R M Sundaram,

RPHR-1005, the stable restorer line of the popular medium slender (MS) grain type rice hybrid, DRRH-3 was improved in this study for resistance against bacterial blight (BB) and blast diseases through marker-assisted backcross breeding (MABB). In this study, four major resistance genes (i.e., Xa21 and Xa33 for BB resistance and ... Read more >>

Front Plant Sci (Frontiers in plant science)
[2016, 7:1195]

Cited: 3 times

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Diversity-Oriented Synthesis of Substituted Benzo[b]thiophenes and Their Hetero-Fused Analogues through Palladium-Catalyzed Oxidative C-H Functionalization/Intramolecular Arylthiolation.

Anand Acharya, S Vijay Kumar, Hiriyakkanavar Ila,

An efficient, high yielding route to multisubstituted benzo[b]thiophenes has been developed through palladium-catalyzed intramolecular oxidative C-H functionalization-arylthiolation of enethiolate salts of α-aryl-β-(het)aryl/alkyl-β-mercaptoacrylonitriles/acrylates or acrylophenones. The overall strategy involves a one-pot, two-step process in which enethiolate salts [generated in situ through base-mediated condensation of substituted arylacetonitriles, deoxybenzoins, or arylacetates with (het)aryl ... Read more >>

Chemistry (Chemistry (Weinheim an der Bergstrasse, Germany))
[2015, 21(47):17116-17125]

Cited: 7 times

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Facile synthesis of graphene oxide-silver nanocomposite and its modified electrode for enhanced electrochemical detection of nitrite ions.

Nurul Izrini Ikhsan, Perumal Rameshkumar, Alagarsamy Pandikumar, Muhammad Mehmood Shahid, Nay Ming Huang, Swadi Vijay Kumar, Hong Ngee Lim,

In this report, silver nanoparticles (Ag NPs) were successfully deposited on graphene oxide (GO) sheets to form GO-Ag nanocomposite using garlic extract and sunlight and the nanocomposite modified glassy carbon (GC) electrode was applied as an electrochemical sensor for the detection of nitrite ions. The formation of GO-Ag nanocomposite was ... Read more >>

Talanta (Talanta)
[2015, 144:908-914]

Cited: 7 times

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Discovery of precursor and mature microRNAs and their putative gene targets using high-throughput sequencing in pineapple (Ananas comosus var. comosus).

Noor Hydayaty Md Yusuf, Wen Dee Ong, Raimi Mohamed Redwan, Mariam Abd Latip, S Vijay Kumar,

MicroRNAs (miRNAs) are a class of small, endogenous non-coding RNAs that negatively regulate gene expression, resulting in the silencing of target mRNA transcripts through mRNA cleavage or translational inhibition. MiRNAs play significant roles in various biological and physiological processes in plants. However, the miRNA-mediated gene regulatory network in pineapple, the ... Read more >>

Gene (Gene)
[2015, 571(1):71-80]

Cited: 3 times

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One-pot synthesis of functionalized benzo[b]thiophenes and their hetero-fused analogues via intramolecular copper-catalyzed S-arylation of in situ generated enethiolates.

Anand Acharya, S Vijay Kumar, B Saraiah, H Ila,

An efficient one-pot synthesis of highly functionalized multisubstituted benzo[b]thiophenes and their hetero-fused analogues, such as thieno[2,3-b]thiophenes, indolo[2,3-b]thiophenes, and pyrazolo[3,2-c]thiophenes, has been reported. The overall strategy involves sequential base-mediated condensation of 2-bromohet(aryl)acetonitrile precursors with (het)aryl/alkyl dithioesters or other thiocarbonyl species such as dimethyl trithiocarbonate, S-methyl xanthates, methyl N-imidazolyl dithioate, N-alkyl dithiocarbamate, ... Read more >>

J. Org. Chem. (The Journal of organic chemistry)
[2015, 80(5):2884-2892]

Cited: 6 times

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Development and validation of a RP-HPLC method for the quantitation of tofacitinib in rat plasma and its application to a pharmacokinetic study.

Vijay Kumar S, Vinay Dhiman, Kalpesh Kumar Giri, Kuldeep Sharma, Mohd Zainuddin, Ramesh Mullangi,

A novel, simple, specific, sensitive and reproducible high-performance liquid chromatography (HPLC) assay method has been developed and validated for the estimation of tofacitinib in rat plasma. The bioanalytical procedure involves extraction of tofacitinib and itraconazole (internal standard, IS) from rat plasma with a simple liquid-liquid extraction process. The chromatographic analysis ... Read more >>

Biomed. Chromatogr. (Biomedical chromatography : BMC)
[2015, 29(9):1325-1329]

Cited: 2 times

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Development of an LC-MS/MS method for determination of bicalutamide on dried blood spots: application to pharmacokinetic study in mice.

Suresh P S, S Vijay Kumar, Avinash Kumar, Ramesh Mullangi,

A rapid and highly sensitive assay method has been developed and validated for the estimation of bicalutamide (BCL) on mouse dried blood spots (DBS) using liquid chromatography coupled to tandem mass spectrometry with electrospray ionization in the negative-ion mode. The assay procedure involves a simple liquid extraction of BCL and ... Read more >>

Biomed. Chromatogr. (Biomedical chromatography : BMC)
[2015, 29(2):254-260]

Cited: 4 times

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Synthesis of N-functionalized/NH-multisubstituted indoles, thienopyrroles, pyrroloindoles, and pyrazolopyrroles via sequential one-pot base-mediated and copper-catalyzed inter- and intramolecular amination of 2-[2-bromo(het)aryl]-3-(het)aryl-3-(methylthio)acrylonitriles.

S Vijay Kumar, B Saraiah, G Parameshwarappa, H Ila, Girijesh K Verma,

A novel, efficient route to substituted 1-N-(het)aryl/NH-2-(het)aryl-3-cyanoindoles and related pyrrolo-fused heterocycles such as thienopyrroles, pyrroloindoles, and pyrazolopyrroles has been reported. The overall protocol involves sequential cycloamination of readily available 2-[2-bromo(het)aryl]-3-(het)aryl-3-(methylthio)acrylonitrile precursors with primary amines or amides via two key C-N bond-forming processes, one base-mediated intermolecular and the other Cu-catalyzed intramolecular ... Read more >>

J. Org. Chem. (The Journal of organic chemistry)
[2014, 79(17):7961-7978]

Cited: 5 times

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Synthesis of 2,4,5-trisubstituted thiazoles via Lawesson's reagent-mediated chemoselective thionation-cyclization of functionalized enamides.

S Vijay Kumar, G Parameshwarappa, H Ila,

An efficient route to 2-phenyl/(2-thienyl)-5-(het)aryl/(methylthio)-4-functionalized thiazoles via one-step chemoselective thionation-cyclization of highly functionalized enamides mediated by Lawesson's reagent is reported. These enamide precursors are obtained by nucleophilic ring-opening of 2-phenyl/(2-thienyl)-4-[bis(methylthio)/(methylthio)(het)arylmethylene]-5-oxazolones with alkoxides and a variety of primary aromatic/aliphatic amines or amino acid esters, leading to the introduction of an ester, ... Read more >>

J. Org. Chem. (The Journal of organic chemistry)
[2013, 78(14):7362-7369]

Cited: 1 time

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Development and validation of an RP-HPLC method for the quantitation of Orteronel (TAK-700), a CYP17A1 enzyme inhibitor, in rat plasma and its application to a pharmacokinetic study.

Avinash Kumar, Vijay Kumar S, Sandip Gurav, Mohd Zainuddin, Purushottam Dewang, Raghava Reddy Kethiri, Sriram Rajagopal, Ramesh Mullangi,

A novel, simple, specific, sensitive and reproducible high-performance liquid chromatography assay method has been developed and validated for the estimation of Orteronel in rat plasma. The bioanalytical procedure involves extraction of Orteronel and phenacetin (internal standard) from rat plasma with a simple liquid-liquid extraction process. The chromatographic analysis was performed ... Read more >>

Biomed. Chromatogr. (Biomedical chromatography : BMC)
[2013, 27(12):1590-1594]

Cited: 1 time

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Cyclocondensation of arylhydrazines with 1,3-bis(het)arylmonothio-1,3-diketones and 1,3-bis(het)aryl-3-(methylthio)-2-propenones: synthesis of 1-aryl-3,5-bis(het)arylpyrazoles with complementary regioselectivity.

S Vijay Kumar, Santosh K Yadav, B Raghava, B Saraiah, H Ila, K S Rangappa, Arpan Hazra,

Two efficient highly regioselective routes for the synthesis of unsymmetrically substituted 1-aryl-3,5-bis(het)arylpyrazoles with complementary regioselectivity starting from active methylene ketones have been reported. In the first protocol, the newly synthesized 1,3-bis(het)aryl-monothio-1,3-diketone precursors (prepared by condensation of active methylene ketones with het(aryl) dithioesters in the presence of sodium hydride) were reacted ... Read more >>

J. Org. Chem. (The Journal of organic chemistry)
[2013, 78(10):4960-4973]

Cited: 8 times

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Synthesis of 2-phenyl-4,5-substituted oxazoles by copper-catalyzed intramolecular cyclization of functionalized enamides.

S Vijay Kumar, B Saraiah, N C Misra, H Ila,

An efficient two-step synthesis of 2-phenyl-4,5-substituted oxazoles involving intramolecular copper-catalyzed cyclization of highly functionalized novel β-(methylthio)enamides as the key step has been reported. These enamides are obtained by nucleophilic ring-opening of newly synthesized 4-[(methylthio)hetero(aryl)methylene]-2-phenyl-5-oxazolone precursors by alkoxides, amines, amino acid esters and aryl/alkyl Grignard reagents, thus leading to the introduction ... Read more >>

J. Org. Chem. (The Journal of organic chemistry)
[2012, 77(23):10752-10763]

Cited: 3 times

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Validated RP-HPLC/UV method for the quantitation of abiraterone in rat plasma and its application to a pharmacokinetic study in rats.

S Vijay Kumar, G Rudresha, Sandip Gurav, Mohd Zainuddin, Purushottam Dewang, Raghava Reddy Kethiri, Sriram Rajagopal, Ramesh Mullangi,

A novel, simple, specific, sensitive and reproducible high-performance liquid chromatography (HPLC) assay method has been developed and validated for the estimation of abiraterone (ART) in rat plasma. The analytical procedure involves extraction of ART and diclofenac (internal standard, IS) from rat plasma with a simple liquid-liquid extraction process. The chromatographic ... Read more >>

Biomed. Chromatogr. (Biomedical chromatography : BMC)
[2013, 27(2):203-207]

Cited: 4 times

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Sequence analysis of the ribosomal DNA internal transcribed spacer regions in Termitomyces heimii species

Shafiquzzaman Siddiquee, Weng Yan Yee, Khanam Taslima, Nur Hasan Nudin Fatihah, S Vijay Kumar, Md Mainul Hasan,

Termitomyces represents a very poorly known genus of fungi whose essential characteristic is that all representatives of the genus are cultivated by termites (Macrotermitinae) in their nest. Many species of Termitomyces commonly form fruiting bodies which develop from fungus combs within the nest. Identification based on morphological characteristics is problematic, ... Read more >>

Ann. Microbiol. (Annals of microbiology)
[2012, 62(2):797-803]

Cited: 1 time

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