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  1. Article ; Online: Time-dependent plastic behavior of bacteria leading to rupture.

    Siddiquie, Reshma Y / Sharma, Kuldeep / Banerjee, Anirban / Agrawal, Amit / Joshi, Suhas S

    Journal of the mechanical behavior of biomedical materials

    2023  Volume 145, Page(s) 106048

    Abstract: A study of the mechanical response of bacteria is essential in designing an antibacterial surface for implants and food packaging applications. This research evaluated the mechanical response of Escherichia coli under different loading conditions. ... ...

    Abstract A study of the mechanical response of bacteria is essential in designing an antibacterial surface for implants and food packaging applications. This research evaluated the mechanical response of Escherichia coli under different loading conditions. Indentation and prolonged creep tests were performed to understand their viscoelastic-plastic response. The results indicate that varying loading rates from 1 μm/s to 5 μm/s show an increase in modulus of 182% and 90%, calculated in the loading and unloading cycles, respectively, and a decrease in adhesion force by 42%. However, on varying loads from 5 nN to 25 nN, nominal change is observed in both modulus and adhesion force. The rupture curve at 100 nN load shows elastic and a small plastic deformation accompanied by a sharp peak indicating the cell wall rupture. The rupture force at the peak was found to be 34.38 ± 5.15 nN, irrespective of the loading rate, making it a failure criterion for bacteria rupture. The creep response of bacteria increases (for 6 s) and then remains constant (for 15 s) with time, indicating that a standard linear solid (SLS) model applies to this behavior. This work attempts to evaluate the mechanical properties of E. coli bacteria focusing on its rupture by contact killing mechanism.
    MeSH term(s) Humans ; Escherichia coli ; Stress, Mechanical ; Rupture
    Language English
    Publishing date 2023-07-27
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2378381-3
    ISSN 1878-0180 ; 1751-6161
    ISSN (online) 1878-0180
    ISSN 1751-6161
    DOI 10.1016/j.jmbbm.2023.106048
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Surface Alterations to Impart Antiviral Properties to Combat COVID-19 Transmission.

    Siddiquie, Reshma Y / Agrawal, Amit / Joshi, Suhas S

    Transactions of the Indian National Academy of Engineering : an international journal of engineering and technology

    2020  Volume 5, Issue 2, Page(s) 343–347

    Abstract: A global epidemic caused by highly transmittable COVID-19 is causing severe loss of human life. In this study, two aspects of reducing transmission of COVID-19 virus, due to surface contact, are discussed: first refers to the effect of nanocarbon ... ...

    Abstract A global epidemic caused by highly transmittable COVID-19 is causing severe loss of human life. In this study, two aspects of reducing transmission of COVID-19 virus, due to surface contact, are discussed: first refers to the effect of nanocarbon fullerene C
    Language English
    Publishing date 2020-05-14
    Publishing country Singapore
    Document type Journal Article
    ISSN 2662-5423
    ISSN (online) 2662-5423
    DOI 10.1007/s41403-020-00096-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Surface Alterations to Impart Antiviral Properties to Combat COVID-19 Transmission

    Siddiquie, Reshma Y. / Agrawal, Amit / Joshi, Suhas S.

    Transactions of the Indian National Academy of Engineering

    2020  Volume 5, Issue 2, Page(s) 343–347

    Keywords covid19
    Language English
    Publisher Springer Science and Business Media LLC
    Publishing country us
    Document type Article ; Online
    ISSN 2662-5415
    DOI 10.1007/s41403-020-00096-9
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article: Surface Alterations to Impart Antiviral Properties to Combat COVID-19 Transmission

    Siddiquie, Reshma Y. / Agrawal, Amit / Joshi, Suhas S.

    Transactions of the Indian National Academy of Engineering

    Abstract: A global epidemic caused by highly transmittable COVID-19 is causing severe loss of human life In this study, two aspects of reducing transmission of COVID-19 virus, due to surface contact, are discussed: first refers to the effect of nanocarbon ... ...

    Abstract A global epidemic caused by highly transmittable COVID-19 is causing severe loss of human life In this study, two aspects of reducing transmission of COVID-19 virus, due to surface contact, are discussed: first refers to the effect of nanocarbon fullerene C60 coating on surface, that causes lipid peroxidation on the phospholipid layer present in the outer envelope of COVID-19;the second aspect refers to creating hydrophobic surfaces by texturing them, so that the contact area between virus and surface is minimized due to the presence of entrapped air between the topographies These can be similar to micro-/nano-multiscale textured surfaces that have anti-biofouling properties Fullerene-coated surfaces can be seen as a possible solution to decrease the adhesion of virus on the surface, as they will be hydrophobic as well as toxic to the envelope
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #260051
    Database COVID19

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  5. Article ; Online: Anti-Biofouling Properties of Femtosecond Laser-Induced Submicron Topographies on Elastomeric Surfaces.

    Siddiquie, Reshma Y / Gaddam, Anvesh / Agrawal, Amit / Dimov, Stefan S / Joshi, Suhas S

    Langmuir : the ACS journal of surfaces and colloids

    2020  Volume 36, Issue 19, Page(s) 5349–5358

    Abstract: Antibacterial coatings are often employed to elastomer surfaces to inhibit bacterial attachment. However, such approaches could lead to increased antibiotic resistance. Surface micro-/nanotexturing is gaining significant attention recently, as it is a ... ...

    Abstract Antibacterial coatings are often employed to elastomer surfaces to inhibit bacterial attachment. However, such approaches could lead to increased antibiotic resistance. Surface micro-/nanotexturing is gaining significant attention recently, as it is a passive approach to reduce bacterial adhesion to surfaces. To this end, this work aims to assess the anti-biofouling functionality of femtosecond laser-induced submicron topographies on biomedical elastomer surfaces. Femtosecond laser processing was employed to produce two types of topographies on stainless-steel substrates. The first one was highly regular and single scale submicron laser-induced periodic surface structures (LIPSS) while the second one was multiscale structures (MSs) containing both submicron- and micron-scale features. Subsequently, these topographies were replicated on polydimethylsiloxane (PDMS) and polyurethane (PU) elastomers to evaluate their bacterial retention characteristics. The submicron textured PDMS and PU surfaces exhibited long-term hydrophobic durability up to 100 h under immersed conditions. Both LIPSS and MS topographies on PDMS and PU elastomeric surfaces were shown to substantially reduce (>89%) the adhesion of Gram-negative
    Language English
    Publishing date 2020-05-08
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.0c00753
    Database MEDical Literature Analysis and Retrieval System OnLINE

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