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  1. Article ; Online: Performance prediction of a circularly polarized graphene-dielectric resonator-based antenna for THz frequency application using machine learning algorithms.

    Kumar, Kundan / Sadhu, Pradip Kumar

    Applied optics

    2024  Volume 63, Issue 6, Page(s) A1–A6

    Abstract: In this article, a graphene-dielectric resonator-based antenna is designed in the THz frequency regime. Circular polarization is achieved by feeding the cylindrical-shaped ceramic using a perturbed square-shaped aperture. Graphene loading over the ... ...

    Abstract In this article, a graphene-dielectric resonator-based antenna is designed in the THz frequency regime. Circular polarization is achieved by feeding the cylindrical-shaped ceramic using a perturbed square-shaped aperture. Graphene loading over the alumina ceramic provides the frequency reconfigurable feature. In order to overcome the difficulty of simulating the THz antenna (i.e., very large simulation time), machine learning algorithms such as the artificial neural network (ANN) and random forest are used to effectively predict the performance of the designed antenna. The proposed antenna works effectively in between 5.0 and 5.5 THz with a 3 dB axial ratio frequency range from 5.1 to 5.35 THz. There is good correlation found between the predicted, measured, and simulated reflection coefficient and axial ratio. Due to stable radiation properties and good diversity performance within the operating frequency band, the proposed antenna can be employable for different wireless applications in the THz frequency regime.
    Language English
    Publishing date 2024-03-04
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.502463
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Cloning, homology modelling and expression analysis of Oryza sativa WNK gene family.

    Negi, Yogesh / Kumar, Kundan

    International journal of biological macromolecules

    2023  Volume 229, Page(s) 994–1008

    Abstract: With No Lysine kinases (WNKs) represents a gene family that encodes Ser/Thr kinases, with anomalous disposition of catalytic lysine residue in subdomain I. In plants, WNKs had been linked to circadian rhythm, photoperiodic response and abiotic stress ... ...

    Abstract With No Lysine kinases (WNKs) represents a gene family that encodes Ser/Thr kinases, with anomalous disposition of catalytic lysine residue in subdomain I. In plants, WNKs had been linked to circadian rhythm, photoperiodic response and abiotic stress tolerance with mechanism yet undeciphered. In the present study, full-length CDS sequences of rice WNKs (OsWNK1 to 8) were cloned from indica cultivar IR64. A total of six highly conserved kinase subdomains were identified. Comparative analysis of protein sequences from six different species of rice showed varying magnitudes of substitution (76.2 %), deletion (15.4 %), and addition (8.4 %) events. ConSurf analysis coupled with CASTp results identified functional residues that were clustered together in modelled 3-D structures. Among post-translational modifications (PTMs) studied, 87.7 % of phosphorylation sites were predicted. Mined protein-protein interactions (PPIs) depicted OsWNKs to interact notably with other OsWNK members and with key proteins like PRR95 involved in photoperiodic response and protein phosphatase like PP2C involved in ABA signalling. Gene duplication analysis revealed two paralogous duplicated gene pairs: WNK6-WNK9 and WNK7-WNK8. Oryza sativa showed maximum syntenic relationship with Sorghum bicolor among the compared species. OsWNKs showed differential transcript expression profiles on treatment with plant growth regulators indicating its versatile role in plant growth and development.
    MeSH term(s) Oryza/metabolism ; Plant Proteins/chemistry ; Amino Acid Sequence ; Plant Growth Regulators/metabolism ; Cloning, Molecular ; Gene Expression Regulation, Plant ; Phylogeny ; Stress, Physiological/genetics
    Chemical Substances Plant Proteins ; Plant Growth Regulators
    Language English
    Publishing date 2023-01-04
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2022.12.328
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    In stock of ZB MED Cologne/Königswinter

    Zs.B 2374: Show issues Location:
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  3. Article ; Online: Rice tonoplast intrinsic protein member OsTIP1;2 confers tolerance to arsenite stress.

    Karle, Suhas Balasaheb / Kumar, Kundan

    Journal of hazardous materials

    2023  Volume 465, Page(s) 133078

    Abstract: The International Agency for Research on Cancer categorizes arsenic (As) as a group I carcinogen. Arsenic exposure significantly reduces growth, development, metabolism, and crop yield. Tonoplast intrinsic proteins (TIPs) belong to the major intrinsic ... ...

    Abstract The International Agency for Research on Cancer categorizes arsenic (As) as a group I carcinogen. Arsenic exposure significantly reduces growth, development, metabolism, and crop yield. Tonoplast intrinsic proteins (TIPs) belong to the major intrinsic protein (MIP) superfamily and transport various substrates, including metals/metalloids. Our study aimed to characterize rice OsTIP1;2 in As[III] stress response. The gene expression analysis showed that the OsTIP1;2 expression was enhanced in roots on exposure to As[III] treatment. The heterologous expression of OsTIP1;2 in S. cerevisiae mutant lacking YCF1 (ycf1∆) complemented the As[III] transport function of the YCF1 transporter but not for boron (B) and arsenate As[V], indicating its substrate selective nature. The ycf1∆ mutant expressing OsTIP1;2 accumulated more As than the wild type (W303-1A) and ycf1∆ mutant strain carrying the pYES2.1 vector. OsTIP1;2 activity was partially inhibited in the presence of the aquaporin (AQP) inhibitors. The subcellular localization studies confirmed that OsTIP1;2 is localized to the tonoplast. The transient overexpression of OsTIP1;2 in Nicotiana benthamiana leaves resulted in increased activities of enzymatic and non-enzymatic antioxidants, suggesting a potential role in mitigating oxidative stress induced by As[III]. The transgenic N. tabacum overexpressing OsTIP1;2 displayed an As[III]-tolerant phenotype, with increased fresh weight and root length than the wild-type (WT) and empty vector (EV line). The As translocation factor (TF) for WT and EV was around 0.8, while that of OE lines was around 0.4. Moreover, the OE line bioconcentration factor (BCF) was more than 1. Notably, the reduced TF and increased BCF in the OE line imply the potential of OsTIP1;2 for phytostabilization.
    MeSH term(s) Arsenic/metabolism ; Oryza/metabolism ; Saccharomyces cerevisiae/metabolism ; Arsenites/metabolism ; Plant Proteins/genetics ; Plant Roots/metabolism
    Chemical Substances Arsenic (N712M78A8G) ; arsenite (N5509X556J) ; Arsenites ; Plant Proteins
    Language English
    Publishing date 2023-11-29
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1491302-1
    ISSN 1873-3336 ; 0304-3894
    ISSN (online) 1873-3336
    ISSN 0304-3894
    DOI 10.1016/j.jhazmat.2023.133078
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  4. Article ; Online: SWI/SNF complex-mediated chromatin remodeling in

    Kumar, Kundan / Pareek, Aditi / Kaur, Rupinder

    iScience

    2024  Volume 27, Issue 4, Page(s) 109607

    Abstract: Immune evasion is critical for fungal virulence. However, how the human opportunistic ... ...

    Abstract Immune evasion is critical for fungal virulence. However, how the human opportunistic pathogen
    Language English
    Publishing date 2024-03-27
    Publishing country United States
    Document type Journal Article
    ISSN 2589-0042
    ISSN (online) 2589-0042
    DOI 10.1016/j.isci.2024.109607
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  5. Article: Dimensional reduction of a fractured medium for a two-phase flow

    Dugstad, Martin / Kumar, Kundan

    Advances in water resources. 2022 Apr., v. 162

    2022  

    Abstract: We consider a porous medium containing a single fracture, and identify the aperture to length ratio as the small parameter ɛ with the fracture permeability and the fracture porosity scaled as exponents of ɛ. We consider a two-phase flow where the flow is ...

    Abstract We consider a porous medium containing a single fracture, and identify the aperture to length ratio as the small parameter ɛ with the fracture permeability and the fracture porosity scaled as exponents of ɛ. We consider a two-phase flow where the flow is governed by the mass balance and the Darcy law. Using formal asymptotic approach, we derive a catalogue of reduced models as the vanishing limit of ɛ. Our derivation provides new models in a hybrid-dimensional setting as well as models which exhibit two-scale behaviour. Several numerical examples confirm the theoretical derivations and provide additional insight.
    Keywords permeability ; porosity ; porous media ; water
    Language English
    Dates of publication 2022-04
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 2023320-6
    ISSN 1872-9657 ; 0309-1708
    ISSN (online) 1872-9657
    ISSN 0309-1708
    DOI 10.1016/j.advwatres.2022.104140
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: Novel Bioactive Magnesium-Hopeite composite by friction stir processing for orthopedic implant applications.

    Kumar, Kundan / Das, Ashish / Prasad, Shashi Bhushan

    Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine

    2023  Volume 237, Issue 4, Page(s) 502–516

    Abstract: Magnesium (Mg) shows excellent potential for orthopedic implant applications owing to its equivalent mechanical properties compared to cortical bone and its biocompatibility. However, the rapid degradation rate of magnesium and its alloys in the ... ...

    Abstract Magnesium (Mg) shows excellent potential for orthopedic implant applications owing to its equivalent mechanical properties compared to cortical bone and its biocompatibility. However, the rapid degradation rate of magnesium and its alloys in the physiological environment results in losing their mechanical integrity before complete bone healing. In light of this, friction stir processing (FSP), a solid-state process, is used to fabricate Hopeite (Zn(PO
    MeSH term(s) Materials Testing ; Friction ; Magnesium/chemistry ; Microscopy, Electron, Scanning ; Durapatite/chemistry ; Corrosion ; Alloys/chemistry
    Chemical Substances Magnesium (I38ZP9992A) ; zinc phosphate (1E2MCT2M62) ; Durapatite (91D9GV0Z28) ; Alloys
    Language English
    Publishing date 2023-03-09
    Publishing country England
    Document type Journal Article
    ZDB-ID 1065942-0
    ISSN 2041-3033 ; 0046-2039 ; 0954-4119
    ISSN (online) 2041-3033
    ISSN 0046-2039 ; 0954-4119
    DOI 10.1177/09544119231158837
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2652: Show issues Location:
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    Jg. 1995 - 2021: Lesesall (2.OG)
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  7. Article ; Online: Overexpression of OsTIP1;2 confers arsenite tolerance in rice and reduces root-to-shoot translocation of arsenic.

    Karle, Suhas Balasaheb / Negi, Yogesh / Srivastava, Sudhakar / Suprasanna, Penna / Kumar, Kundan

    Plant physiology and biochemistry : PPB

    2024  Volume 210, Page(s) 108608

    Abstract: Tonoplast Intrinsic Proteins (TIPs) are vital in transporting water and solutes across vacuolar membrane. The role of TIPs in the arsenic stress response is largely undefined. Rice shows sensitivity to the arsenite [As[III]] stress and its accumulation ... ...

    Abstract Tonoplast Intrinsic Proteins (TIPs) are vital in transporting water and solutes across vacuolar membrane. The role of TIPs in the arsenic stress response is largely undefined. Rice shows sensitivity to the arsenite [As[III]] stress and its accumulation at high concentrations in grains poses severe health hazards. In this study, functional characterization of OsTIP1;2 from Oryza sativa indica cultivar Pusa Basmati-1 (PB-1) was done under the As[III] stress. Overexpression of OsTIP1;2 in PB-1 rice conferred tolerance to As[III] treatment measured in terms of enhanced shoot growth, biomass, and shoot/root ratio of overexpression (OE) lines compared to the wild-type (WT) plants. Moreover, seed priming with the IRW100 yeast cells (deficient in vacuolar membrane As[III] transporter YCF1) expressing OsTIP1;2 further increased As[III] stress tolerance of both WT and OE plants. The dithizone assay showed that WT plants accumulated high arsenic in shoots, while OE lines accumulated more arsenic in roots than shoots thereby limiting the translocation of arsenic to shoot. The activity of enzymatic and non-enzymatic antioxidants also increased in the OE lines on exposure to As[III]. The tissue-specific localization showed OsTIP1;2 promoter activity in root and root hairs, indicating its possible root-specific function. After As[III] treatment in hydroponic medium, the arsenic translocation factor (TF) for WT was around 0.8, while that of OE lines was around 0.2. Moreover, the arsenic content in the grains of OE lines reduced significantly compared to WT plants.
    Language English
    Publishing date 2024-04-09
    Publishing country France
    Document type Journal Article
    ZDB-ID 742978-2
    ISSN 1873-2690 ; 0981-9428
    ISSN (online) 1873-2690
    ISSN 0981-9428
    DOI 10.1016/j.plaphy.2024.108608
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  8. Article ; Online: Evaluation of acute toxicity of an emerging contaminant Oxybenzone on an ecologically important aquatic macrophyte Lemna minor.

    Sawant, Shamika Shantaram / Bharti, Vidya Shree / Shukla, Satya Prakash / Kumar, Kundan / Rathi Bhuvaneswari, G

    Environmental toxicology and pharmacology

    2024  Volume 108, Page(s) 104437

    Abstract: Oxybenzone is an ultraviolet filter frequently used in Personal Care Products, plastics, furniture, etc. and is listed as an Emerging Contaminant. This report studied the acute toxicity of Oxybenzone to Lemna minor after exposure to graded concentrations ...

    Abstract Oxybenzone is an ultraviolet filter frequently used in Personal Care Products, plastics, furniture, etc. and is listed as an Emerging Contaminant. This report studied the acute toxicity of Oxybenzone to Lemna minor after exposure to graded concentrations of Oxybenzone for 7 days. IC
    Language English
    Publishing date 2024-04-10
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1318302-3
    ISSN 1872-7077 ; 1382-6689
    ISSN (online) 1872-7077
    ISSN 1382-6689
    DOI 10.1016/j.etap.2024.104437
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4490: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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  9. Article: A π-conjugated covalent organic framework enables interlocked nickel/photoredox catalysis for light-harvesting cross-coupling reactions.

    Jati, Ayan / Dam, Suranjana / Kumar, Shekhar / Kumar, Kundan / Maji, Biplab

    Chemical science

    2023  Volume 14, Issue 32, Page(s) 8624–8634

    Abstract: Covalent organic frameworks (COFs) are an outstanding platform for heterogeneous photocatalysis. Herein, we synthesized a pyrene-based two-dimensional C[double bond, length as m-dash]C linked π-conjugated ... ...

    Abstract Covalent organic frameworks (COFs) are an outstanding platform for heterogeneous photocatalysis. Herein, we synthesized a pyrene-based two-dimensional C[double bond, length as m-dash]C linked π-conjugated COF
    Language English
    Publishing date 2023-07-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 2559110-1
    ISSN 2041-6539 ; 2041-6520
    ISSN (online) 2041-6539
    ISSN 2041-6520
    DOI 10.1039/d3sc02440g
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  10. Article: A Cyclic Disulfide Diastereomer From Bioactive Fraction of

    Dahibhate, Nilesh Lakshman / Shukla, Sanjeev K / Kumar, Kundan

    Frontiers in pharmacology

    2022  Volume 13, Page(s) 890790

    Abstract: Pseudomonas ... ...

    Abstract Pseudomonas aeruginosa
    Language English
    Publishing date 2022-06-02
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587355-6
    ISSN 1663-9812
    ISSN 1663-9812
    DOI 10.3389/fphar.2022.890790
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