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Article ; Online: Repercussion of Using Internet Sources

Nilakshi Sharma / S.N. Singh

Evidence Based Library and Information Practice, Vol 18, Iss

Dilemma for Research Communities

2023 Volume 2

Abstract: Objectives – Consultation of internet sources for educational and research purposes is the new normal. As a result of information communication technology, information creation and access are more convenient. The current study was carried out to ... ...

Abstract	Objectives – Consultation of internet sources for educational and research purposes is the new normal. As a result of information communication technology, information creation and access are more convenient. The current study was carried out to investigate the proportion of use of internet sources for research purposes by research scholars of three central universities of North East India, namely Tezpur University, Mizoram University, and Rajiv Gandhi University. Methods – The researchers collected data from 123 respondents through an online questionnaire that was distributed through different social media platforms. The study was conducted among Research Scholars (PhD and M.Phil) of Mizoram University, Rajiv Gandhi University, and Tezpur University. Results – The research results show that research communities are moving toward digital platforms for searching and consulting their required resources. Most of the respondents consult internet sources for writing their research reports, but they do not format the references properly. Some research scholars do not follow any referencing style for citing web documents, and respondents do not have much awareness about the differences between URLs and DOIs. Research communities also face problems due to the inaccessibility of online documents cited by former researchers. Conclusion – Since most of the respondents are not familiar with the use of web archives, the current study suggests that higher education institutions should arrange awareness programs on the use of web archives. Research communities should follow the proper referencing formats to acknowledge others’ works. Publishers should mandate a citation style for authors and verify the accuracy of the references before publishing articles or other works.
Keywords	Bibliography. Library science. Information resources ; Z
Subject code	001
Language	English
Publishing date	2023-06-01T00:00:00Z
Publisher	University of Alberta
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: SnTe as a BSF enhances the performance of Sb2Se3 based solar cell

Raman Kumari / Mamta / Rahul Kumar / V.N. Singh

Heliyon, Vol 8, Iss 12, Pp e12043- (2022)

A numerical approach

2022

Abstract: This theoretical investigation’s primary goal is to investigate how the Sb2Se3 solar cell’s performance may be improved. Here, SnTe, as an innovative back surface field (BSF) layer, has been added between the rear contact (Mo) and absorber layer (Sb2Se3). ...

Abstract	This theoretical investigation’s primary goal is to investigate how the Sb2Se3 solar cell’s performance may be improved. Here, SnTe, as an innovative back surface field (BSF) layer, has been added between the rear contact (Mo) and absorber layer (Sb2Se3). Above the absorber layer, the structure comprises a thin CdS buffer layer. For each layer of the Al/CdS/Sb2Se3/SnTe/Mo structure, the physical characteristics such as the active layer’s thicknesses, carrier concentration, defect density, and rear electrode’s work function are determined. The suggested cell outperformed the solar cell without the SnTe layer, which had an efficiency of 20.33%, with enhanced efficiency and open-circuit voltage (Voc) of 28.25% and 0.86 V, respectively, at 300 K. The above solar cell used 0.15 μm SnTe layer, 0.05 μm CdS, and 2.0 μm Sb2Se3 layer. The features of the antimony selenide (Sb2Se3) based solar structure is examined using the SCAPS-1D software, which simulates solar cells in one dimension. Investigations have also been done into how working temperatures influence the I–V parameters of the structure.
Keywords	Sb2Se3 ; BSF ; SnTe ; Solar cell ; SCAPS-1D ; Science (General) ; Q1-390 ; Social sciences (General) ; H1-99
Language	English
Publishing date	2022-12-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Sb2Se3 as an HTL for Mo/Sb2Se3/Cs2TiF6/TiO2 solar structure

Mamta / K.K. Maurya / V.N. Singh

Heliyon, Vol 8, Iss 10, Pp e10925- (2022)

performance evaluation with SCAPS-1D

2022

Abstract: Perovskite-based solar cells (PSCs) have recently gained much attention due to their distinctive optical and electrical properties. Cesium titanium fluoride (Cs2TiF6) is an example of lead-free perovskite absorber material with a bandgap of 1.9 eV, ... ...

Abstract	Perovskite-based solar cells (PSCs) have recently gained much attention due to their distinctive optical and electrical properties. Cesium titanium fluoride (Cs2TiF6) is an example of lead-free perovskite absorber material with a bandgap of 1.9 eV, making it suitable for a solar device. However, the high cost of the hole transport material (HTM) and other considerations prevent their commercial production. Antimony selenide (Sb2Se3) is well suited for HTM as it is low-cost material with a tunable bandgap. The work presents the TiO2/Cs2TiF6/Sb2Se3-based solar cell performance using SCAPS-1D simulation software. The effect of all the active layer thicknesses, defect density, hole-electron mobility, and temperature on the device is also simulated. I–V, C–V, and QE curves and energy band diagrams show the photovoltaic device's excellent performance. The outputs are competent enough with an efficiency of 22.10 % when Sb2Se3 is used as a hole transport layer (HTL) in the device architecture. The results suggest that the lead-free solar cell is a promising future option for the solar cell community regarding environmental friendliness and high efficiency.
Keywords	HTL ; Perovskite ; Sb2Se3 ; SCAPS-1D ; Science (General) ; Q1-390 ; Social sciences (General) ; H1-99
Subject code	600
Language	English
Publishing date	2022-10-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Structural Context of a Critical Exon of Spinal Muscular Atrophy Gene

Natalia N. Singh / Collin A. O'Leary / Taylor Eich / Walter N. Moss / Ravindra N. Singh

Frontiers in Molecular Biosciences, Vol

2022 Volume 9

Abstract: Humans contain two nearly identical copies of Survival Motor Neuron genes, SMN1 and SMN2. Deletion or mutation of SMN1 causes spinal muscular atrophy (SMA), one of the leading genetic diseases associated with infant mortality. SMN2 is unable to ... ...

Abstract	Humans contain two nearly identical copies of Survival Motor Neuron genes, SMN1 and SMN2. Deletion or mutation of SMN1 causes spinal muscular atrophy (SMA), one of the leading genetic diseases associated with infant mortality. SMN2 is unable to compensate for the loss of SMN1 due to predominant exon 7 skipping, leading to the production of a truncated protein. Antisense oligonucleotide and small molecule-based strategies aimed at the restoration of SMN2 exon 7 inclusion are approved therapies of SMA. Many cis-elements and transacting factors have been implicated in regulation of SMN exon 7 splicing. Also, several structural elements, including those formed by a long-distance interaction, have been implicated in the modulation of SMN exon 7 splicing. Several of these structures have been confirmed by enzymatic and chemical structure-probing methods. Additional structures formed by inter-intronic interactions have been predicted by computational algorithms. SMN genes generate a vast repertoire of circular RNAs through inter-intronic secondary structures formed by inverted Alu repeats present in large number in SMN genes. Here, we review the structural context of the exonic and intronic cis-elements that promote or prevent exon 7 recognition. We discuss how structural rearrangements triggered by single nucleotide substitutions could bring drastic changes in SMN2 exon 7 splicing. We also propose potential mechanisms by which inter-intronic structures might impact the splicing outcomes.
Keywords	RNA structure ; splicing ; small molecule ; spinal muscular atrophy ; SMA ; survival motor neuron ; Biology (General) ; QH301-705.5
Subject code	572
Language	English
Publishing date	2022-07-01T00:00:00Z
Publisher	Frontiers Media S.A.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Superior inhibition of virulence and biofilm formation of Pseudomonas aeruginosa PAO1 by phyto-synthesized silver nanoparticles through anti-quorum sensing activity

Kumar, Sanket / S.Paliya, Balwant / N.Singh, Brahma

Microbial pathogenesis. 2022 July 08,

2022

Abstract: Quorum sensing (QS)-regulated bacterial biofilm formation is a crucial issue in causing resistance against existing antibiotics. There is a considerable necessity to disrupt the interrelationship between bacterial QS, virulence, and biofilm formation. ... ...

Abstract	Quorum sensing (QS)-regulated bacterial biofilm formation is a crucial issue in causing resistance against existing antibiotics. There is a considerable necessity to disrupt the interrelationship between bacterial QS, virulence, and biofilm formation. Disabling QS could be a novel tactic of great clinical importance. Here, we biosynthesized silver nanoparticles (Ka-AgNPs) using the aqueous leaf extract of Koelreuteria paniculata as a reducing and capping agents. The UV–Vis spectroscopy confirmed the synthesis of Ka-AgNPs as a characterization peak observed at 420 nm. TEM image revealed the spherical shape distribution of Ka-AgNPs with average particle size of 30.0 ± 5 nm. The anti-QS activity of Ka-AgNPs was tested against a bio-indicator bacterium Chromobacterium violaceum 12472 and a multi-drug resistant model strain of Pseudomonas aeruginosa (PAO1). The results demonstrated that the Ka-AgNPs superiorly inhibited QS-regulated virulence factors in PAO1 without affecting cell viability compared to chemically synthesized AgNPs (Cs-AgNPs). The Ka-AgNPs effectively suppressed the formation of biofilm of PAO1. RT-PCR results revealed that the Ka-AgNPs inhibited the expression of QS-regulated virulence genes of PAO1. These results suggest that the phyto-synthesized AgNPs could be used as promising anti-infective agents for treating drug-resistant P. aeruginosa.
Keywords	Chromobacterium violaceum ; Koelreuteria paniculata ; Pseudomonas aeruginosa ; bacteria ; biofilm ; cell viability ; leaf extracts ; multiple drug resistance ; nanosilver ; particle size ; pathogenesis ; ultraviolet-visible spectroscopy ; virulence
Language	English
Dates of publication	2022-0708
Publishing place	Elsevier Ltd
Document type	Article
Note	Pre-press version
ZDB-ID	632772-2
ISSN	1096-1208 ; 0882-4010
ISSN (online)	1096-1208
ISSN	0882-4010
DOI	10.1016/j.micpath.2022.105678
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Performance evaluation of ZnSnN2 solar cells with Si back surface field using SCAPS-1D

Abdelmoumene Laidouci / Mamta / V.N. Singh / Pratap Kumar Dakua / Deepak Kumar Panda

Heliyon, Vol 9, Iss 10, Pp e20601- (2023)

A theoretical study

2023

Abstract: The earth-abundant semiconductor zinc tin nitride (ZnSnN2) has garnered significant attention as a prospective material in photovoltaic and lighting applications, primarily due to its tunable narrow bandgap and high absorption coefficient. This study ... ...

Abstract	The earth-abundant semiconductor zinc tin nitride (ZnSnN2) has garnered significant attention as a prospective material in photovoltaic and lighting applications, primarily due to its tunable narrow bandgap and high absorption coefficient. This study focuses on a numerical investigation of ZnSnN2 solar cell structures using the SCAPS 1-D software. The objective is to analyze the influence of various physical and geometrical parameters on solar cell performance. These parameters include the thicknesses of the ZnO window layer, CdS buffer layer, ZnSnN2 absorber layer, and Si back surface field layer (BSF), as well as operating temperature, series and shunt resistances (RS and Rsh), absorber layer defect density, interface defects, and the generation-recombination profile of the n-ZnO:Al/n-CdS/p-ZnSnN2/p-Si/Mo structure. We have evaluated the capabilities of this novel material absorber by investigating its performance across a range of thicknesses. We have started with ultrathin absorber thicknesses and gradually increased them to thicker levels to determine the optimal thickness for achieving high efficiency. Under optimal conditions, a thin solar cell with a thickness (wp) of 1 μm achieved an efficiency (η) of 23.9%. In a practical solar cell operating at room temperature, optimal parameters were observed with a thicker absorber layer (wp = 8 μm) and a BSF width of 0.3 μm. The cell exhibited resistances of Rsh = 106 Ω cm2 and Rs = 1 Ω cm2, along with a low defect density (Nt = 1010 cm−3) in the ZnSnN2 semiconductor. These factors combined to yield an impressive efficiency of 29.5%. Numerous studies on emerging ternary nitride semiconductors (Zn-IV-N2) have highlighted ZnSnN2 as a promising material for thin-film photovoltaics. This compound is appealing due to its abundance, non-toxicity, and cost-effectiveness. Unlike conventional solar cells that depend on rare, toxic, and costly elements, these components are still essential for today's solar cell technology.
Keywords	ZnSnN2 ; Silicon ; SCAPS 1D ; Thin films ; Thickness ; BSF ; Science (General) ; Q1-390 ; Social sciences (General) ; H1-99
Language	English
Publishing date	2023-10-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Synthesis and study on aroylhydrazones having cyanovinylpyrrole

Poonam Rawat / R.N. Singh

Arabian Journal of Chemistry, Vol 12, Iss 8, Pp 2384-

2019 Volume 2397

Abstract: A series of C-cyanovinylpyrrole containing aroylhydrazones (3a–c), derived from ethyl 2-cyano-3-(5-formyl-1H-pyrrol-2-yl)-acrylate and acid hydrazides: salicylhydrazide, isoniazid and 3,5-dinitrobenzohydrazide have been characterized by various ... ...

Abstract	A series of C-cyanovinylpyrrole containing aroylhydrazones (3a–c), derived from ethyl 2-cyano-3-(5-formyl-1H-pyrrol-2-yl)-acrylate and acid hydrazides: salicylhydrazide, isoniazid and 3,5-dinitrobenzohydrazide have been characterized by various spectroscopic techniques (1H NMR, 13C NMR, Mass, UV–Visible, Emission, FT-IR) and quantum chemical calculations. TD-DFT has been used to calculate the various electronic excitations and their nature. The emission spectra show that (3a–c) are good photoluminescent material due to intense emission at higher wavelength in yellow, green and blue region with high Stoke’s shift in the region 80–328 nm. The molar refractivity (MR) for (3a–c) is calculated as 109.28, 102.96, 119.14 esu, respectively. Natural bond orbital (NBO) analysis has been carried out to explore the various conjugative and hyperconjugative interactions within molecule and their second order stabilization energy (E(2)). Global electrophilicity index (ω = 5.41–8.11 eV) shows that (3a–c) molecules work as strong electrophiles. The local reactivity descriptors analyses such as Fukui functions (fk+, fk−), local softnesses (sk+, sk−) and electrophilicity indices (ωk+, ωk−) have been performed to determine the reactive sites within molecules. The first hyperpolarizabilities (β0) of (3a–c) have been computed and found to increase with electron withdrawing substituents. Keywords: Emission, TD-DFT, NBO, First hyperpolarizabilities
Keywords	Chemistry ; QD1-999
Subject code	541
Language	English
Publishing date	2019-12-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: A novel sensitive based approach to ATC enhancement in wind power integrated transmission system

Aishvarya Narain / S. K. Srivastava / S. N. Singh

SN Applied Sciences, Vol 3, Iss 5, Pp 1-

2021 Volume 10

Abstract: Abstract Available transfer capability (ATC) plays an important role for both buyers and suppliers in the deregulated power system. As the integration of renewable energy sources is taking place very quickly in the system. It is not suggested to place ... ...

Abstract	Abstract Available transfer capability (ATC) plays an important role for both buyers and suppliers in the deregulated power system. As the integration of renewable energy sources is taking place very quickly in the system. It is not suggested to place wind generation (WG) at any point of the system. In this paper, the optimal location of buses for WG using a novel sensitive based formula is proposed. The zones are formed using the transmission congestion distribution factor (TCDF) values. The average transmission congestion distribution factor (ATCDF) is used to locate the optimal point of the system. When the WG is integrated into the system its obvious ATC increases but at which point the ATC values will be more is considered as the main objective. The WG is placed at every bus in the zone created by the TCDF value and the ATC value is calculated. The test is performed on the IEEE-30 bus system in MATLAB coding environment. The comparison result shows the ATC value enhances more when the WG is placed according to the proposed method. The proposed method also helps to find multiple locations for WG installation according to ATCDF value. Highlights Average TCDF value is proposed to find the optimal bus location for getting more ATC value. Integration of WG according to highest ATCDF value in the system. Comparison of ATC obtain from the integration of WG at different buses in sensitive zones. Validation of a proposed method by comparing the ATC value obtain from integrating WG at different buses. The optimal bus location based on the ATCDF value gave enhance ATC value compare to the other bus location. ATCDF value helps in finding the multiple locations for integration of WG in the system.
Keywords	Load flow ; AC power distribution factor (ACPTDF) ; Available transfer capability (ATC) ; Average TCDF (ATCDF) ; Wind generation ; Science ; Q ; Technology ; T
Subject code	531
Language	English
Publishing date	2021-04-01T00:00:00Z
Publisher	Springer
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Cohort profile for the Loma Linda University Health BREATHE programme

Pramil N Singh / Olivia Moses / Wendy Shih / Mark Hubbard

BMJ Open, Vol 12, Iss

a model to study continuously incentivised employee smoking cessation

2022 Volume 4

Keywords	Medicine ; R
Language	English
Publishing date	2022-04-01T00:00:00Z
Publisher	BMJ Publishing Group
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Synthesis, spectral analysis and study of antimicrobial activity of 2,5-diformyl-1H-pyrrole bis(methan-1-yl-1-ylidene)dimalonohydrazone

Poonam Rawat / R.N. Singh

Arabian Journal of Chemistry, Vol 12, Iss 7, Pp 1219-

2019 Volume 1233

Abstract: We have synthesized 2,5-diformyl-1H-pyrrole bis(methan-1-yl-1-ylidene)dimalonohydrazone (DPBMD) and characterized by elemental analysis, FT-IR, UV–Vis, Mass, 1H and 13C NMR spectroscopy. Theoretical calculations were performed by ab initio RHF and ... ...

Abstract	We have synthesized 2,5-diformyl-1H-pyrrole bis(methan-1-yl-1-ylidene)dimalonohydrazone (DPBMD) and characterized by elemental analysis, FT-IR, UV–Vis, Mass, 1H and 13C NMR spectroscopy. Theoretical calculations were performed by ab initio RHF and density functional theory (DFT)/B3LYP method, 6-31G(d,p) and 6-311++G(d,p) basis sets. The calculated scaled vibrational frequency values have been compared with experimental FT-IR spectrum. The calculated result shows excellent agreement between experimental and calculated frequencies at B3LYP method and 6-311++G(d,p) basis set. The thermodynamics properties, NBO, nonlinear optical properties and mulliken charges of DPBMD have also been analyzed. Involvement of nitrogen [N8/N18] and [N14/N24] lone pairs of electron with [π∗(C9–O10), π∗(C6–N7)/π∗(C16–N17), π∗(C19–O20)] and [(π∗(C12–O13)/π∗(C22–O23)] leads to an enormous stabilization of 84.6/84.6 and 64.1/64.1 kcal/mol of the molecule. A combined experimental and theoretical stretching wavenumber symmetric (3003, 3332 cm−1) and asymmetric (3276, 3398 cm−1) analysis confirms free NH2 groups in DPBMD. The calculated first hyperpolarizability (β0 = 5.80 × 10−30 esu) at B3LYP method and 6-311++G(d,p) basis sets indicates that DPBMD can be used as an attractive material for non-linear optical. The electronic descriptor analysis indicates that DPBMD is a good precursor for heterocyclic synthesis and as ligand for metal complex formation. The preliminary bioassay suggested that the DPBMD compound exhibits relatively good antibacterial and fungicidal activity against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Streptococcus pyogenes, Candida albicans, and Aspergillus niger. Keywords: NMR spectroscopy, IR spectroscopy, DFT, NBO
Keywords	Chemistry ; QD1-999
Subject code	541
Language	English
Publishing date	2019-11-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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