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  1. Article ; Online: Correction: A biomass-derived dual crosslinked DNA-nanoparticle hydrogel for visible light-induced photodynamic bacterial inactivation.

    Das, Gourab / Nayak, Suman / Kotness, Dinesh Kumar / Das, Prolay

    Soft matter

    2024  Volume 20, Issue 2, Page(s) 449

    Abstract: Correction for 'A biomass-derived dual crosslinked DNA-nanoparticle hydrogel for visible light-induced photodynamic bacterial inactivation' by Gourab ... ...

    Abstract Correction for 'A biomass-derived dual crosslinked DNA-nanoparticle hydrogel for visible light-induced photodynamic bacterial inactivation' by Gourab Das
    Language English
    Publishing date 2024-01-03
    Publishing country England
    Document type Published Erratum
    ZDB-ID 2191476-X
    ISSN 1744-6848 ; 1744-683X
    ISSN (online) 1744-6848
    ISSN 1744-683X
    DOI 10.1039/d3sm90175k
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Multifunctional Self-Healing Carbon Dot-Gelatin Bioadhesive: Improved Tissue Adhesion with Simultaneous Drug Delivery, Optical Tracking, and Photoactivated Sterilization.

    Aggarwal, Maansi / Panigrahi, Harekrishna / Kotnees, Dinesh Kumar / Das, Prolay

    Biomacromolecules

    2024  

    Abstract: Bioadhesives with all-inclusive properties for simultaneous strong and robust adhesion, cohesion, tracking, drug delivery, self-sterilization, and nontoxicity are still farfetched. Herein, a carbon dot (CD) is made to infuse each of the above-desired ... ...

    Abstract Bioadhesives with all-inclusive properties for simultaneous strong and robust adhesion, cohesion, tracking, drug delivery, self-sterilization, and nontoxicity are still farfetched. Herein, a carbon dot (CD) is made to infuse each of the above-desired aspects with gelatin, an inexpensive edible protein. The CD derived through controlled hydrothermal pyrolysis of dopamine and terephthaldehyde retained -NH
    Language English
    Publishing date 2024-04-17
    Publishing country United States
    Document type Journal Article
    ISSN 1526-4602
    ISSN (online) 1526-4602
    DOI 10.1021/acs.biomac.4c00313
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Carbon dot-based superhydrophobic modification of a covalent organic framework for oil-in-water emulsion separation.

    Nayak, Suman / Hassan, Atikur / Das, Neeladri / Das, Prolay

    Chemical communications (Cambridge, England)

    2023  Volume 59, Issue 55, Page(s) 8548–8551

    Abstract: A super hydrophobic composite is developed for the first time through the non-covalent self-assembly of a hydrophilic covalent organic framework (COF) and amphoteric CDs to achieve highly selective separation of dispersed micro droplets of oil from an ... ...

    Abstract A super hydrophobic composite is developed for the first time through the non-covalent self-assembly of a hydrophilic covalent organic framework (COF) and amphoteric CDs to achieve highly selective separation of dispersed micro droplets of oil from an oil/water mixture.
    MeSH term(s) Metal-Organic Frameworks ; Carbon ; Emulsions/chemistry ; Oils/chemistry ; Petroleum Pollution ; Hydrophobic and Hydrophilic Interactions
    Chemical Substances Metal-Organic Frameworks ; Carbon (7440-44-0) ; Emulsions ; Oils
    Language English
    Publishing date 2023-07-06
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/d3cc02128a
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Machine Learning-Mediated Ultrasensitive Detection of Citrinin and Associated Mycotoxins in Real Food Samples Discerned from a Photoluminescent Carbon Dot Barcode Array.

    Aggarwal, Maansi / Sahoo, Pranab / Saha, Sriparna / Das, Prolay

    Journal of agricultural and food chemistry

    2023  Volume 71, Issue 34, Page(s) 12849–12858

    Abstract: Economically viable remote sensing of foodborne contaminants using minimalistic chemical reagents and simultaneous automation calls for a concrete integration of a chemical detection strategy with artificial intelligence. In a first of its kind, we ... ...

    Abstract Economically viable remote sensing of foodborne contaminants using minimalistic chemical reagents and simultaneous automation calls for a concrete integration of a chemical detection strategy with artificial intelligence. In a first of its kind, we report the ultrasensitive detection of citrinin and associated mycotoxins like aflatoxin B1 and ochratoxin A using an Alizarin Red S (ARS) and cystamine-derived carbon dot (CD) that aptly amalgamate with machine learning algorithms for automation. The photoluminescence response of the CD as a function of various solvents and pH is used to generate array channels that are further modulated in the presence of the mycotoxins whose digital images were acquired to determine pixelation, essentially creating a barcode. The barcode was fed to machine learning algorithms that actualize and intertwine convoluted databases, demonstrating Extreme Gradient Boosting (XGBoost) as the optimized model out of eight algorithms tested. Spiked samples of wheat, rice, gram, maize, coffee, and milk were used to evaluate the testing model where an exemplary accuracy of 100% even at 10 pmol of mycotoxin concentration was achieved. Most importantly, the coexistence of mycotoxins could also be detected through the CD array and XGBoost synergy hinting toward a broader scope of the developed methodology for smart detection of foodborne contaminants.
    MeSH term(s) Mycotoxins/analysis ; Citrinin/analysis ; Carbon ; Artificial Intelligence ; Aflatoxin B1 ; Machine Learning ; Food Contamination/analysis
    Chemical Substances Mycotoxins ; Citrinin (3S697X6SNZ) ; Carbon (7440-44-0) ; Aflatoxin B1 (9N2N2Y55MH)
    Language English
    Publishing date 2023-08-16
    Publishing country United States
    Document type Journal Article
    ZDB-ID 241619-0
    ISSN 1520-5118 ; 0021-8561
    ISSN (online) 1520-5118
    ISSN 0021-8561
    DOI 10.1021/acs.jafc.3c04846
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1172: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  5. Article ; Online: Visible light-induced charge injection and migration in self-assembled carbon dot-DNA-carbon dot nano-dumbbell obtained through controlled stoichiometric conjugation.

    Mandal, Saptarshi / Das, Prolay

    Nanoscale

    2021  Volume 13, Issue 33, Page(s) 14147–14155

    Abstract: The potential of carbon dots (CDs) for photonic conversion to charged states, together with the ability of DNA to transport such charge for extensive charge separation, offers an opportunity to control directionality of migration for photo-induced ... ...

    Abstract The potential of carbon dots (CDs) for photonic conversion to charged states, together with the ability of DNA to transport such charge for extensive charge separation, offers an opportunity to control directionality of migration for photo-induced radical cations in CD-DNA based nano-assemblies. This is achieved through engineering the reaction valency of CDs whereby one CD is covalently conjugated with one ssDNA strand. Subsequently, a CD-DNA-CD nano-dumbbell architecture was created through hybridization mediated self-assembly. The time and intensity-dependent transduction of visible light photonic energy to chemical potential in DNA was achieved through irradiation of 1,4-diaminoathraquinone and glyoxal derived CD with 100 W tungsten source and natural sunlight. Following charge injection by CD, the radical cation migration in DNA was perceived through trapping of the hole in repeated GG steps in the DNA. Overall, a breakthrough in visible-light-induced charge transfer by CD into DNA was achieved, potentially applicable to optobioelectronics.
    MeSH term(s) Carbon ; DNA ; Light ; Nucleic Acid Hybridization ; Quantum Dots
    Chemical Substances Carbon (7440-44-0) ; DNA (9007-49-2)
    Language English
    Publishing date 2021-08-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515664-0
    ISSN 2040-3372 ; 2040-3364
    ISSN (online) 2040-3372
    ISSN 2040-3364
    DOI 10.1039/d1nr01689j
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Covalent Conjugation of Carbon Dots with Plasmid and DNA Condensation Thereafter: Realistic Insights into the Condensate Morphology, Energetics, and Photophysics.

    Nayak, Suman / Das, Prolay

    ACS omega

    2021  Volume 6, Issue 33, Page(s) 21425–21435

    Abstract: The use of carbon quantum dots (CDs) as trackable nanocarriers for plasmid and gene as hybrid DNA condensates has gained momentum, as evident from the significant recent research efforts. However, the in-depth morphology of the condensates, the ... ...

    Abstract The use of carbon quantum dots (CDs) as trackable nanocarriers for plasmid and gene as hybrid DNA condensates has gained momentum, as evident from the significant recent research efforts. However, the in-depth morphology of the condensates, the energetics of the condensation process, and the photophysical aspects of the CD are not well understood and often disregarded. Herein, for the first time, we covalently attached linearized pUC19 with citric acid and cysteamine-derived CD through the reaction of the surface amine groups of CDs with the 5'-phospho-methyl imidazolide derivative of the plasmid to obtain a 1:1 CD-pUC19 covalent conjugate. The CD-pUC19 conjugates were further transformed into DNA condensates with spermine that displayed a toroidal morphology with a diameter of ∼200 nm involving ∼2-5 CD-pUC19 conjugates in a single condensate. While the interaction of pristine CD to spermine was exothermic, the binding of the CD-pUC19 conjugate with spermine was endothermic and primarily entropy-driven. The condensed plasmid displayed severe conformational stress and deviation from the B-form due to the compact packing of the DNA but better transfection ability than the pristine CD. The CDs in the condensates tend to come close to each other at the core that results in their shielding from excitation. However, this does not prevent them from emanating reactive oxygen species on visible light exposure that compromises the decondensation process and cell viability at higher exposure times, calling for utmost caution in establishing them as nonviral transfecting agents universally.
    Language English
    Publishing date 2021-08-13
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.1c02247
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Elucidating the relationship between red fluorescence and structural dynamics of carbon dots dispersed in different solvents.

    Mandal, Saptarshi / Erimban, Shakkira / Banerjee, Subhrajeet / Daschakraborty, Snehasis / Das, Prolay

    Physical chemistry chemical physics : PCCP

    2023  Volume 25, Issue 35, Page(s) 23645–23657

    Abstract: The mechanism of intrinsic fluorescence of carbon dots (CDs), the latest nanomaterial from the carbon family, was supposedly deciphered through multiple theories. However, the much sought-after persistent red emission of CDs as a foreseeable consequence ... ...

    Abstract The mechanism of intrinsic fluorescence of carbon dots (CDs), the latest nanomaterial from the carbon family, was supposedly deciphered through multiple theories. However, the much sought-after persistent red emission of CDs as a foreseeable consequence of experiments remains elusive prompting the question of whether tuning of the red emission of CDs is a predictable outcome or a serendipitous coincidence. Herein, we tried to decode the same by exploring Alizarin Red S (ARS)-based red emitting CDs in different solvents with wisely chosen analytical tools. The findings are aptly supported by molecular dynamics studies through an experimental intuition-driven model-building approach. Parallel interception of the CDs with powder X-ray diffraction (pXRD) and photophysical spectroscopic studies revealed an important relationship between the solvent and CDs. Tautomerism, a well-known phenomenon with chemical entities, was found to be operative for CDs that greatly influence the Stokes shift and ultimately the fluorescence outcome. Most importantly, pXRD studies established the turbostratism of the CDs where the well-ordered graphitic structure of CDs gets disrupted with solvent molecules. The extent of such disruption is a function of solvent and CD composition that plays a formidable role in obtaining red fluorescence. Thus, for the first time, we demonstrate that the red emission of CDs is related to its structural integrity and if taken care of could be sustained, a tremendously desirable outcome for relevant applications.
    Language English
    Publishing date 2023-09-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 1476244-4
    ISSN 1463-9084 ; 1463-9076
    ISSN (online) 1463-9084
    ISSN 1463-9076
    DOI 10.1039/d3cp02498a
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: A biomass-derived dual crosslinked DNA-nanoparticle hydrogel for visible light-induced photodynamic bacterial inactivation.

    Das, Gourab / Nayak, Suman / Kotness, Dinesh Kumar / Das, Prolay

    Soft matter

    2023  Volume 19, Issue 48, Page(s) 9511–9519

    Abstract: Sustainability in developing novel nanomaterials (NPs) from biomass sources is a challenging proposition mainly due to the difficulty of infusing or retaining desired chemical functionalities in the biomass substrate. In this study, we demonstrate the ... ...

    Abstract Sustainability in developing novel nanomaterials (NPs) from biomass sources is a challenging proposition mainly due to the difficulty of infusing or retaining desired chemical functionalities in the biomass substrate. In this study, we demonstrate the synthesis of DNA-nanoparticles (DNA-NP) from onion genomic DNA as a plant biomass source through controlled hydrothermal pyrolysis to retain functional groups in the NPs for predictable downstream chemical transformations. A dual crosslinking scheme was introduced that involves the DNA-NP to form a hydrogel. Chemical crosslinking was achieved through the formation of a Schiff base between the -CHO groups of glutaraldehyde and the amine functionality present on the DNA-NP surface as well as in the nucleobases of the dangling DNA strands of DNA-NP. Simultaneous physical entanglement was attained through hybridization-mediated self-assembly of the dangling DNA strands of the DNA-NP with untransformed onion genomic DNA. As a corollary of the dual crosslinking, the resulting hydrogel not only displayed remarkable mechanical strength but also showed self-healing properties. The ability of the DNA-NP to generate reactive oxygen species (ROS) with visible light irradiation is translated to the hydrogel, making the system potent for biofilm destruction. The high loading efficiency of the model drug ampicillin sodium (Amp) in the hydrogel was achieved which was released in four days. This hints towards the application of the hydrogel through combination antibiotic-antibacterial photodynamic treatment (APDT) as demonstrated here with both Gram-positive and Gram-negative bacteria.
    MeSH term(s) Hydrogels/chemistry ; Anti-Bacterial Agents/chemistry ; Biomass ; Gram-Negative Bacteria ; Gram-Positive Bacteria ; Nanoparticles/chemistry ; DNA ; Light
    Chemical Substances Hydrogels ; Anti-Bacterial Agents ; DNA (9007-49-2)
    Language English
    Publishing date 2023-12-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 2191476-X
    ISSN 1744-6848 ; 1744-683X
    ISSN (online) 1744-6848
    ISSN 1744-683X
    DOI 10.1039/d3sm01400b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Ultrasensitive visual detection of mycotoxin citrinin with yellow-light emitting carbon dot and Congo red

    Mandal, Saptarshi / Das, Prolay

    Food chemistry. 2020 May 15, v. 312

    2020  

    Abstract: Ultrasensitive visual detection of mycotoxin citrinin is reported here using a novel yellow-light emitting Carbon dot (CD) and Congo red dye. Detection strategy is based on higher binding affinity of citrinin with diammonium citrate, and urea derived CD ... ...

    Abstract Ultrasensitive visual detection of mycotoxin citrinin is reported here using a novel yellow-light emitting Carbon dot (CD) and Congo red dye. Detection strategy is based on higher binding affinity of citrinin with diammonium citrate, and urea derived CD over Congo red in presence of Mg2+. Congo red statically quenched the yellow fluorescence of CD, resulting in emission in red region, which was restored in presence of citrinin. Visual limit of detection (LOD) of 10 pmol and spectroscopic LOD of 6.6 pmol/mL was achieved within 5 min of incubation with citrinin. The assembly was found to respond well for citrinin detection in the presence of Aflatoxin b1 (AFL b1) and Ochratoxin A (OTA), that frequently co-exist with citrinin in real food samples. The method exhibits immense potential to sense citrinin in sub-nanogram range by visual inspection in an inexpensive yet robust on-site detection platform in relevant food packaging and agricultural industry.
    Keywords Congo red ; aflatoxin B1 ; agricultural industry ; binding capacity ; carbon ; citrates ; citrinin ; detection limit ; fluorescence ; food packaging ; magnesium ; ochratoxin A ; spectroscopy ; urea
    Language English
    Dates of publication 2020-0515
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 243123-3
    ISSN 1873-7072 ; 0308-8146
    ISSN (online) 1873-7072
    ISSN 0308-8146
    DOI 10.1016/j.foodchem.2019.126076
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 3634: Show issues

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  10. Article ; Online: Chemically induced crosslinked enhanced emission of carbon polymer dots discerning healthy and cancer cells through pH-dependent tunable photoluminescence.

    Nayak, Suman / Guleria, Kanika / Sen, Abhik / Banerjee, Subhrajeet / Subramanian, Ranga / Das, Prolay

    Journal of materials chemistry. B

    2023  Volume 11, Issue 3, Page(s) 594–605

    Abstract: Chemically induced crosslinked enhanced emission (CEE) of urea and citric acid-derived carbon polymer dot (CPD) nanoparticles is established here with a rare zero linker approach, ...

    Abstract Chemically induced crosslinked enhanced emission (CEE) of urea and citric acid-derived carbon polymer dot (CPD) nanoparticles is established here with a rare zero linker approach,
    MeSH term(s) Polymers/chemistry ; Carbon/chemistry ; Fluorescence ; Fluorescent Dyes/chemistry ; Hydrogen-Ion Concentration ; Neoplasms/diagnostic imaging
    Chemical Substances Polymers ; Carbon (7440-44-0) ; Fluorescent Dyes
    Language English
    Publishing date 2023-01-18
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2702241-9
    ISSN 2050-7518 ; 2050-750X
    ISSN (online) 2050-7518
    ISSN 2050-750X
    DOI 10.1039/d2tb01836e
    Database MEDical Literature Analysis and Retrieval System OnLINE

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