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Rahman S, Konwar A, Konwar AN, Dubey S, Ghosh MP, Boro B, Thakur D, Chowdhury D. Ag Nanoparticle Incorporated Guar Gum-Sodium Alginate-I-Carrageenan Tribiopolymer Blended Cloth Waste Lint Extracted Cellulose Nanocrystal Antimicrobial Composite Film. Biomacromolecules 2024; 25:1491-1508. [PMID: 38377554 DOI: 10.1021/acs.biomac.3c01076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
A biopolymer-based formulation for robust and active food packaging material was developed. This material consisted of a blend of three biopolymers (guar gum-sodium alginate-i-carrageenan) reinforced by cellulose nanocrystals (CNC) alongside the integration of silver nanoparticles (AgNPs) with varying sizes. The CNC utilized in this process was derived from cloth waste lint (CWL) generated from a household cloth dryer machine. This CNC synthesis underwent a series of solvent treatments to yield the CNC used in the composite. CNC and AgNPs were incorporated into the tribiopolymeric blend matrix to construct a nanocomposite film that showed excellent tensile strength (∼90 MPa). The nanocomposite film also exhibited antimicrobial activity against Escherichia coli ATCC 25922 and Bacillus cereus MTCC 1272. In this report, it was demonstrated that the zone of inhibition against E. coli and B. cereus depends on the variation of size and amount of AgNPs inside the polymeric matrix. The practical applicability of such a film was also demonstrated by applying it to sliced bread and the enhancement of the shelf life of the raped bread was compared with a control. Thus, the guar gum-sodium alginate-i-carrageenan tribiopolymer blend with a cloth waste lint extracted cellulose nanocrystal composite film is antimicrobial, hence, an excellent candidate as an active packaging film.
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Affiliation(s)
- Sazzadur Rahman
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati-781035, India
| | - Achyut Konwar
- CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam India
| | - Aditya Narayan Konwar
- Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati-781035, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Sonali Dubey
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati-781035, India
| | - Mritunjoy Prasad Ghosh
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati-781035, India
| | - Bitopan Boro
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati-781035, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Debajit Thakur
- Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati-781035, India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati-781035, India
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Chakravarty P, Deka H, Chowdhury D. Green titanium dioxide (TiO 2 ) nanoparticles assisted biodegradation of anthracene employing Serratia quinivorans HP5. J Basic Microbiol 2024. [PMID: 38381060 DOI: 10.1002/jobm.202300680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 12/28/2023] [Accepted: 02/03/2024] [Indexed: 02/22/2024]
Abstract
The anthracene biodegradation potential of Serratia quinivorans HP5 was studied under a controlled laboratory environment. The green TiO2 nanoparticles (NPs) synthesized from Paenibacillus sp. HD1PAH was used to accelerate the biodegradation process. The synergistic application of TiO2 NPs and S. quinivorans HP5 resulted in a reduction of anthracene concentration by 1.2 folds in liquid-medium and 1.5 folds in contaminated soil. Gas-chromatography and mass-spectrometric investigation showed the production of four anthracene derivatives, namely 1,2-anthracene dihydrodiol, 6,7-benzocoumarin, anthrone, and 9,10-anthraquinoneat the termination of experimental periods. Furthermore, bacterial biomass increased by 23.3 folds in the presence of TiO2 NPs, and overall soil enzyme activities were enhanced by 4.2 folds in the treated samples. In addition, there was a negative correlation observed between the biomass of S. quinivorans HP5 and the concentrations of anthracene, suggesting the involvement of bacterium in anthracene biodegradation processes. The degradation pathway of anthracene revealed its transformation into the less toxic compound 9,10-anthraquinone. Overall, this study elucidates a novel biodegradation pathway for anthracene and highlights the potential of nano-assisted bacterial remediation as a promising approach for environmental cleanup.
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Affiliation(s)
- Paramita Chakravarty
- Ecology and Environmental Remediation Laboratory, Department of Botany, Gauhati University, Guwahati, Assam, India
| | - Hemen Deka
- Ecology and Environmental Remediation Laboratory, Department of Botany, Gauhati University, Guwahati, Assam, India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Guwahati, Assam, India
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Barman M, Rahman S, Joshi N, Sarma N, Bharadwaj P, Thakur D, Devi R, Chowdhury D, Hurren C, Rajkhowa R. Banana fibre-chitosan-guar gum composite as an alternative wound healing material. Int J Biol Macromol 2024; 259:129653. [PMID: 38280292 DOI: 10.1016/j.ijbiomac.2024.129653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 12/22/2023] [Accepted: 01/19/2024] [Indexed: 01/29/2024]
Abstract
Bio-composites, which can be obtained from the renewable natural resources, are fascinating material for use as sustainable biomaterials with essential properties like biodegradable, bio-compatibility as well cyto-compatibility etc. These properties are useful for bio-medical including wound healing applications. In this study, fibre obtained banana pseudo stem of banana plant, which is otherwise wasted, was used as a material along with chitosan and guar gum to fabricate a banana fibre-biopolymer composite patch. The physiochemical properties of the patches were examined using Fourier Transformed Infra-red spectrophotometer (FT-IR), tensile tester, Scanning Electron Microscope (SEM), contact angle tester, swelling and degradation studies. We further demonstrated that a herbal drug, Nirgundi could be loaded to the patch showed controlled its release at different pHs. The patch had good antibacterial property and supported proliferation of mouse fibroblast cells. The study thus indicates that banana fibre-chitosan-guar gum composite can be developed into an alternative wound healing material.
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Affiliation(s)
- Mridusmita Barman
- Institute of Frontier Materials, Deakin University, Geelong, Victoria, Australia; Material Nanochemistry Laboratory, Institute of Advanced Study in Science and Technology (IASST), Guwahati, Assam, India; Life Sciences Division, Institute of Advanced Study in Science and Technology (IASST), Guwahati, Assam, India
| | - Sazzadur Rahman
- Material Nanochemistry Laboratory, Institute of Advanced Study in Science and Technology (IASST), Guwahati, Assam, India
| | - Naresh Joshi
- Life Sciences Division, Institute of Advanced Study in Science and Technology (IASST), Guwahati, Assam, India
| | - Neeraj Sarma
- Life Sciences Division, Institute of Advanced Study in Science and Technology (IASST), Guwahati, Assam, India
| | - Pranami Bharadwaj
- Life Sciences Division, Institute of Advanced Study in Science and Technology (IASST), Guwahati, Assam, India
| | - Debajit Thakur
- Life Sciences Division, Institute of Advanced Study in Science and Technology (IASST), Guwahati, Assam, India
| | - Rajlakshmi Devi
- Life Sciences Division, Institute of Advanced Study in Science and Technology (IASST), Guwahati, Assam, India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Institute of Advanced Study in Science and Technology (IASST), Guwahati, Assam, India.
| | - Christopher Hurren
- Institute of Frontier Materials, Deakin University, Geelong, Victoria, Australia
| | - Rangam Rajkhowa
- Institute of Frontier Materials, Deakin University, Geelong, Victoria, Australia
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Rahman S, Gogoi J, Dubey S, Chowdhury D. Animal derived biopolymers for food packaging applications: A review. Int J Biol Macromol 2024; 255:128197. [PMID: 37979757 DOI: 10.1016/j.ijbiomac.2023.128197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 11/11/2023] [Accepted: 11/15/2023] [Indexed: 11/20/2023]
Abstract
It is essential to use environment-friendly, non-toxic, biodegradable and sustainable materials for various applications. Biopolymers are derived from renewable sources like plants, microorganisms, and agricultural wastes. Unlike conventional polymers, biopolymer has a lower carbon footprint and contributes less to greenhouse gas emission. All biopolymers are biodegradable, meaning natural processes can break them down into harmless products such as water and biomass. This property is of utmost importance for various sustainable applications. This review discusses different classifications of biopolymers based on origin, including plant-based, animal-based and micro-organism-based biopolymers. The review also discusses the desirable properties that are required in materials for their use as packaging material. It also discusses the different processes used in modifying the biopolymer to improve its properties. Finally, this review shows the recent developments taking place in using specifically animal origin-based biopolymer and its use in packaging material. It was observed that animal-origin-based biopolymers, although they possess unique properties however, are less explored than plant-origin biopolymers. The animal-origin-based biopolymers covered in this review are chitosan, gelatin, collagen, keratin, casein, whey, hyaluronic acid and silk fibroin. This review will help in renewing research interest in animal-origin biopolymers. In summary, biopolymer offers a sustainable and environment-friendly alternative to conventional polymers. Their versatility, biocompatibility will help create a more sustainable future.
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Affiliation(s)
- Sazzadur Rahman
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, India; Department of Chemistry, Gauhati University, G. B. Nagar, Guwahati 781014, Assam, India
| | - Jahnabi Gogoi
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, India
| | - Sonali Dubey
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, India; Department of Chemistry, Gauhati University, G. B. Nagar, Guwahati 781014, Assam, India.
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Sonkar R, Mondal NJ, Thakur S, Saikia E, Ghosh MP, Chowdhury D. Cobalt-substituted ZnS QDs: a diluted magnetic semiconductor and efficient photocatalyst. Nanoscale Adv 2023; 5:7042-7056. [PMID: 38059034 PMCID: PMC10696947 DOI: 10.1039/d3na00836c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 11/07/2023] [Indexed: 12/08/2023]
Abstract
Recently, understanding the origin of induced magnetic characteristics in transition metal atom-doped QDs has been a major focus owing to their potential applications in the area of spintronic devices. A detailed experimental and theoretical investigation was conducted to understand the physical properties of Co-doped ZnS QDs containing different weight percentages of Co atoms [CoxZn1-xS (x = 0.00, 0.03, 0.06, and 0.09)], prepared using chemical co-precipitation techniques. X-ray diffraction studies proved that all the prepared QDs formed an extremely pure cubic zinc blende crystallographic phase free of contaminants. The validation of the quantum dot nature of all the samples was provided by the HRTEM images, BET studies, and blue shift in the absorption spectra. Both the obtained FTIR and PL spectra at room temperature also confirmed the phase purity of the prepared QDs. The observed weak ferromagnetic behavior of the doped samples was due to the presence of p-d hybridization between the 3d levels of Co2+ ions and 3p levels of S2- ions of the host ZnS QDs. Hysteresis loops that were obtained at room temperature validated this weak ferromagnetic nature. These obtained results were also supported theoretically using DFT calculations. FDTD simulations provided a detailed explanation for the observed blue shift in the absorption spectra originating from the quantum confinement effect of doped and undoped ZnS QDs. The dielectric properties of all the samples were examined properly, and it was also found that the grain boundaries contributed effectively to providing the dielectric response. The doped ZnS sample containing more Co dopants at low frequencies showed a progressive rise in polarisation loss. In addition, Co-doped ZnS QDs are efficient photocatalysts. A pH-dependent photodegradation test of ciprofloxacin (CIP) antibiotic was conducted using 9% Co-doped ZnS QDs. It was observed that 9% Co-doped ZnS nanocatalysts has sufficient capability to degrade CIP to around 94.7% in a solution of pH 10 within one hour. Therefore, besides showing photocatalytic effects, Co-doped ZnS QDs act as ideal dilute magnetic semiconductors (DMSs) and will undoubtedly become excellent candidates for the microelectronics industry because of their special ability to exhibit spin-dependent magneto-electro-optical properties that find use in spin-polarized light-emitting diodes, solid-state lasers, and spin-transistor devices.
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Affiliation(s)
- Rahul Sonkar
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon Garchuk Guwahati 781035 Assam India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Nur Jalal Mondal
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon Garchuk Guwahati 781035 Assam India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Samir Thakur
- Department of Applied Sciences, Gauhati University Guwahati 781014 Assam India
| | - Eeshankur Saikia
- Department of Applied Sciences, Gauhati University Guwahati 781014 Assam India
| | - Mritunjoy Prasad Ghosh
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon Garchuk Guwahati 781035 Assam India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon Garchuk Guwahati 781035 Assam India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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Mondal NJ, Sonkar R, Boro B, Ghosh MP, Chowdhury D. Nanocrystalline Ni-Zn spinel ferrites: size-dependent physical, photocatalytic and antioxidant properties. Nanoscale Adv 2023; 5:5460-5475. [PMID: 37822912 PMCID: PMC10563843 DOI: 10.1039/d3na00446e] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 08/25/2023] [Indexed: 10/13/2023]
Abstract
The physical properties of nanomagnetic particles are expected to be highly dependent on their size. In this study, besides the promising applications of nanocrystalline Ni-Zn spinel ferrites in the area of photocatalysis and free radical scavenging, we present a detailed study with appropriate scientific explanations on the role of size change in modifying and tuning the microstructural, optical and magnetic properties. Three nanostructured Zn0.3Ni0.7Fe2O4 samples of different particle sizes were prepared via the chemical co-precipitation method. Crystallographic phase purity and formation of the spinel cubic phase for all the samples were tested by X-ray diffraction studies. The magnetic properties of the as-synthesized ferrite nanoparticles have been examined thoroughly at 5 K and 300 K. Emergence of superparamagnetic behavior has been observed for the sample with the smallest size ferrite nanoparticles (ZNF-1). The photocatalytic efficiency of all the nanocatalysts was tested on methylene blue (MB) dye and the smallest sized nanocatalyst (ZNF-1) was identified as the most efficient catalyst in degrading MB dye under light illumination. The degradation efficiency was found to decrease with increasing mean particle size of the prepared samples. The antioxidant properties of the prepared ferrite samples were also studied. Here, too, the ZNF-1 sample with the smallest sized nanoparticles exhibited maximum scavenging of free radicals compared to other samples. Hence, the present study clearly demonstrates that smaller-sized Ni-Zn spinel ferrites are efficient materials for tuning the physical properties as well as for use in photocatalytic and antioxidant applications.
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Affiliation(s)
- Nur Jalal Mondal
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 Assam India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Rahul Sonkar
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 Assam India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Bitopan Boro
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 Assam India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Mritunjoy Prasad Ghosh
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 Assam India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 Assam India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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Deb A, Chowdhury D. Biogenic Carbon Quantum Dots: Synthesis and Applications. Curr Med Chem 2023:CMC-EPUB-132398. [PMID: 37291790 DOI: 10.2174/0929867330666230608105201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 04/26/2023] [Accepted: 05/18/2023] [Indexed: 06/10/2023]
Abstract
The new class of nanomaterials termed carbon dots: a quasi-spherical nanoparticle having a size less than 10 nm, possesses some unique characteristics like good aqueous solubility, colloidal stability, resistance to photobleaching, and fluorescence tunability, resulting in the unfolding of their various properties and their usage in different applications. Materials that are naturally derived or produced by living organisms are termed 'biogenic'. Over the past few years, there has been a gradual increase in the use of naturally derived materials in synthesizing carbon dots. Green precursors or biogenic materials are of low cost, readily available, renewable, and environmentally benign. Most importantly, they provide essential benefits not found in synthesized carbon dots. This review focuses on the use of biogenic materials for the synthesis of biogenic carbon dots developed in the past five years. It also briefly explains different synthetic protocols used, along with some significant findings. Thereafter, an overview of the use of biogenic carbon dots (BCDs) in different applications like chemo and biosensors, drug delivery, bioimaging, catalysis and energy applications, etc., is discussed. Thus biogenic carbon dots are future sustainable materials that are now fast replacing conventional carbon quantum prepared from other sources.
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Affiliation(s)
- Ankita Deb
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati-781035, India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati-781035, India
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Phukan K, Sarma H, Devi R, Chowdhury D. Acute toxicity study of onion peel-derived gold nano-bioconjugate. 3 Biotech 2023; 13:172. [PMID: 37188292 PMCID: PMC10169968 DOI: 10.1007/s13205-023-03592-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 04/23/2023] [Indexed: 05/17/2023] Open
Abstract
The acute anti-inflammatory activity of onion peel-derived gold nano-bioconjugate was already established earlier. The current study was aimed to investigate the acute oral toxicity of onion peel-derived gold nano-bioconjugate (GNBC) for safe therapeutic utilization in vivo. The acute toxicity study was carried out in female mice for 15 days and showed no mortality and any abnormal complications. The lethal dose (LD50) was evaluated and found to be higher than 2000 mg/kg. After 15 days, animals were euthanized and hematological, and biochemical analyses were performed. In all hematological and biochemical assays, treated animals did not show significant toxicity when compared to the control group. The body weight, behavior, and histopathological studies showed that GNBC is nontoxic. Thereby, the results suggest that onion peel-derived gold nano-bioconjugate GNBC can be utilized for therapeutic applications in vivo.
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Affiliation(s)
- Kabyashree Phukan
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati, 781035 India
- Present Address: Baosi Banikanta Kakati College, Nagaon, Barpeta, 781311 India
| | - Himangshu Sarma
- Life Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati, 781035 India
| | - Rajlakshmi Devi
- Life Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati, 781035 India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati, 781035 India
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Jose RC, Kanchal T, Louis B, Talukdar NC, Chowdhury D. Grain Characteristics, Moisture, and Specific Peptides Produced by Ustilaginoidea virens Contribute to False Smut Disease in Rice ( Oryza sativa L.). Biomolecules 2023; 13:biom13040669. [PMID: 37189416 DOI: 10.3390/biom13040669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/20/2023] [Accepted: 02/23/2023] [Indexed: 05/17/2023] Open
Abstract
The fungus Ustilaginoidea virens, the causative agent of false smut in rice (Oryza sativa L.), is responsible for one of the severe grain diseases that lead to significant losses worldwide. In this research, microscopic and proteomic analyses were performed by comparing U. virens infected and non-infected grains of the susceptible and resistant rice varieties to provide insights into the molecular and ultrastructural factors involved in false smut formation. Prominent differentially expressed peptide bands and spots were detected due to false smut formation as revealed by sodium dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and two-dimensional gel electrophoresis (2-DE) SDS-PAGE profiles and were identified using liquid chromatography-mass spectrometry (LC-MS/MS). The proteins identified from the resistant grains were involved in diverse biological processes such as cell redox homeostasis, energy, stress tolerance, enzymatic activities, and metabolic pathways. It was found that U. virens produces diverse degrading enzymes such as β-1, 3-endoglucanase, subtilisin-like protease, putative nuclease S1, transaldolase, putative palmitoyl-protein thioesterase, adenosine kinase, and DNase 1 that could discretely alter the host morphophysiology resulting in false smut. The fungus also produced superoxide dismutase, small secreted proteins, and peroxidases during the smut formation. This study revealed that the dimension of rice grain spikes, their elemental composition, moisture content, and the specific peptides produced by the grains and the fungi U. virens play a vital role in the formation of false smut.
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Affiliation(s)
- Robinson C Jose
- Institute of Advanced Study in Science and Technology, Guwahati 781035, India
- Institute of Bioresources and Sustainable Development (IBSD), Imphal 795001, India
| | - Thangjam Kanchal
- Institute of Bioresources and Sustainable Development (IBSD), Imphal 795001, India
| | - Bengyella Louis
- Department of Plant Sciences, University Park, Pennsylvania State University, 101 Tyson Bldg, State College, PA 16802, USA
| | - Narayan C Talukdar
- Institute of Advanced Study in Science and Technology, Guwahati 781035, India
- Faculty of Science, Assam Down Town University, Guwahati 781026, India
| | - Devasish Chowdhury
- Institute of Advanced Study in Science and Technology, Guwahati 781035, India
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Chakravarty P, Deka H, Chowdhury D. Anthracene removal potential of green synthesized titanium dioxide nanoparticles (TiO 2-NPs) and Alcaligenes faecalis HP8 from contaminated soil. Chemosphere 2023; 321:138102. [PMID: 36764617 DOI: 10.1016/j.chemosphere.2023.138102] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 02/07/2023] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
Anthracene biodegradation potential has been studied in liquid culture and soil microcosm environment by employing green synthesized TiO2 nanoparticles (NPs) and Alcaligenes faecalis HP8. The bacterium was isolated from crude oil contaminated soil, while TiO2 nanoparticles were synthesized using Paenibacillus sp. HD1PAH and Cyperus brevifolius which have PAHs remediation abilities. The dual application of TiO2 nanoparticles and Alcaligenes faecalis HP8 decreases anthracene concentration up to 21.3% in liquid at the end of 7 days and 37.9% in the soil treatments after completion of 30 days. Besides, the GC-MS analysis revealed production of five metabolites including 1,2-anthracenedihydrodiol; 6,7-benzocoumarin; 3-hydroxy-2-naphthoic acid; salicylic acid and 9,10-anthraquinone at different time interval of the treatments. Anthracene degradation pathway confirms the breakdown of three ring anthracene to one ring salicylic acid. Additionally, soil dehydrogenase, urease, alkaline phosphatase, catalase and amylase activities increased up to 4.09 folds, 8.6 folds, 4.4 folds, 3.6 folds and 2.1 folds respectively after the combined treatments of TiO2 nanoparticles and Alcaligenes faecalis HP8. The bacterial biomass and residual anthracene concentration were found to be negatively correlated. Finally, the study brings into light a novel anthracene biodegradation pathway and provides a new dimension in nano assisted bacterial remediation.
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Affiliation(s)
- Paramita Chakravarty
- Ecology and Environmental Remediation Laboratory, Department of Botany, Gauhati University, Guwahati, 781014, Assam, India
| | - Hemen Deka
- Ecology and Environmental Remediation Laboratory, Department of Botany, Gauhati University, Guwahati, 781014, Assam, India.
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati, 781035, India
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Khan Z, Thounaojam TC, Chowdhury D, Upadhyaya H. The role of selenium and nano selenium on physiological responses in plant: a review. Plant Growth Regul 2023; 100:409-433. [PMID: 37197287 PMCID: PMC10036987 DOI: 10.1007/s10725-023-00988-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 02/24/2023] [Indexed: 05/15/2023]
Abstract
Selenium (Se), being an essential micronutrient, enhances plant growth and development in trace amounts. It also protects plants against different abiotic stresses by acting as an antioxidant or stimulator in a dose-dependent manner. Knowledge of Se uptake, translocation, and accumulation is crucial to achieving the inclusive benefits of Se in plants. Therefore, this review discusses the absorption, translocation, and signaling of Se in plants as well as proteomic and genomic investigations of Se shortage and toxicity. Furthermore, the physiological responses to Se in plants and its ability to mitigate abiotic stress have been included. In this golden age of nanotechnology, scientists are interested in nanostructured materials due to their advantages over bulk ones. Thus, the synthesis of nano-Se or Se nanoparticles (SeNP) and its impact on plants have been studied, highlighting the essential functions of Se NP in plant physiology. In this review, we survey the research literature from the perspective of the role of Se in plant metabolism. We also highlight the outstanding aspects of Se NP that enlighten the knowledge and importance of Se in the plant system. Graphical abstract
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Affiliation(s)
- Zesmin Khan
- Department of Botany, Cotton University, Guwahati, 781001 Assam India
| | | | - Devasish Chowdhury
- Physical Sciences Division, Institute of Advanced Study in Science and Technology, Guwahati, 781035 India
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12
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Deb A, Nalkar GR, Chowdhury D. Biogenic carbon dot-based fluorescence-mediated immunosensor for the detection of disease biomarker. Anal Chim Acta 2023; 1242:340808. [PMID: 36657894 DOI: 10.1016/j.aca.2023.340808] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 01/05/2023] [Indexed: 01/09/2023]
Abstract
The dynamic interplay of nanotechnology and immunoassay has unlocked an arena for developing next-generation techniques to contribute to detecting disease biomarkers. Herein, the work establishes the strategic fabrication of an immunosensor by sandwich technique based on the fluorescence phenomenon of carbon dots for the detection of the disease biomarker VEGF (Vascular Endothelial Growth Factor). VEGF, a biomarker for angiogenesis, is considered cancerous if found in elevated levels in the blood, and so is paramount for early detection of disease. Carbon dots derived from a biogenic source were synthesized employing a green microwave-assisted method followed by conjugating with a detection antibody, human immunoglobulin G (IgG), via EDC-NHS amidation reaction. On the other hand, the VEGF biomarker was immobilized onto the capture antibody. The detection antibody tagged with the fluorescent probe is employed as a bridge to connect with the VEGF biomarkers bound to the capture antibody. The response to different concentrations of VEGF biomarkers was recorded in terms of the fluorescence intensity of the carbon dots. The fluorescence immunosensor could exhibit a wide linear range of 0.1 fg/mL to 10 pg/mL with a low detection limit of 5.65 pg/mL towards VEGF. The potentiality of this designed immunosensor was qualitatively assessed with human blood plasma samples, showing promising results, thereby upholding the applicability of carbon dots as fluorescent labels in immunoassay techniques.
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Affiliation(s)
- Ankita Deb
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati, 781035, India
| | - Gaurav Raghunath Nalkar
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati, 781035, India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati, 781035, India.
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13
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Chowdhury D, Yip HF, Lam K, Zhu H, Tai XC, Lu A. Dynamic expression of Ddc mediates the melatonin biosynthesis rhythms in the mouse: a virtual knockout approach. Sleep Med 2022. [DOI: 10.1016/j.sleep.2022.05.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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14
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Patil P, Alagarasu K, Chowdhury D, Kakade M, Cherian S, Kaushik S, Yadav J, Kaushik S, Parashar D. In-vitro antiviral activity of Carica papaya formulations against dengue virus type 2 and chikungunya viruses. Heliyon 2022; 8:e11879. [PMCID: PMC9723942 DOI: 10.1016/j.heliyon.2022.e11879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/12/2022] [Accepted: 11/18/2022] [Indexed: 12/07/2022] Open
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15
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Chakravarty P, Chowdhury D, Deka H. Ecological risk assessment of priority PAHs pollutants in crude oil contaminated soil and its impacts on soil biological properties. J Hazard Mater 2022; 437:129325. [PMID: 35716561 DOI: 10.1016/j.jhazmat.2022.129325] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/26/2022] [Accepted: 06/06/2022] [Indexed: 06/15/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are one of the major toxic constituents of crude oil and therefore, an understanding on PAHs associated risks and their relationship with soil biological parameters are necessary for adopting effective risk-based and site specific remediation strategies in the contaminated soil. Here, risks evaluation of eight detected PAHs in terms of toxic equivalent concentration (TEQC), benzo(a)pyrene equivalent (BaPeq), contamination factor (CF), pollution load index (PLI), hazard quotient (HQ), hazard index (HI), toxic unit for individual PAHs (TU) and PAHs mixture (TUm) have been evaluated. Besides, the effect of PAHs contamination on soil biological properties has also been investigated and correlated with PAHs concentrations. The TEQc of eight PAHs was recorded in the range of 0.06-5.0 mg kg-1 soil, whereas the BaPeq value was 25.3 mg kg-1 soil which exceed the permissible limit. Similarly, CF (85.5-1668.2), PLI (322.8), HQ (311.7-8340.9), HI (26,443.8), TU (227.9-3821.6) and TUm(7916.2) also exceed the permissible values for non-toxic conditions indicating carcinogenic risk for humans. Besides, activities of soil dehydrogenase, urease, alkaline-phosphatase, catalase, amylase and cellulase were decreased by 1.5-2.3 folds in the contaminated soil than control. The results of Pearson's correlation matrix also established negative impact of PAHs on the soil's biological properties.
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Affiliation(s)
- Paramita Chakravarty
- Ecology and Environmental Remediation Laboratory, Department of Botany, Gauhati University, Guwahati 781014, Assam, India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Pachim Boragaon, Garchuk, Guwahati 781035, Assam, India
| | - Hemen Deka
- Ecology and Environmental Remediation Laboratory, Department of Botany, Gauhati University, Guwahati 781014, Assam, India.
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16
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Moore S, Zhan L, Liu G, Rittberg R, Patel D, Chowdhury D, Leung B, Cheng S, Mckinnon M, Khan K, Agulnik J, Cheung W, Dawe D, Fung A, Snow S, Cohen V, Yan M, Lok B, Wheatley-Price P, Ho C. EP14.05-020 Population-based Outcomes for Patients with Extensive-Stage Small-cell Lung Cancer from the Canadian SCLC Database (CASCADE). J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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17
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Moore S, Zhan L, Liu G, Rittberg R, Patel D, Chowdhury D, Leung B, Cheng S, Mckinnon M, Khan K, Snow S, Fung A, Dawe D, Cheung W, Agulnik J, Yan M, Cohen V, Wheatley-Price P, Ho C, Lok B. EP14.04-001 Treatment and Outcomes of Patients with Limited-Stage Small-cell Lung Cancer in the Canadian SCLC Database (CASCADE). J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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18
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Moore S, Zhan L, Liu G, Rittberg R, Patel D, Chowdhury D, Leung B, Cheng S, Mckinnon M, Khan K, Agulnik J, Fung A, Cheung W, Snow S, Dawe D, Cohen V, Yan M, Ho C, Lok B, Wheatley-Price P. EP03.01-016 The Canadian Small Cell Lung Cancer Database (CASCADE): Results from a Multi-Institutional Real-World Evidence Collaboration. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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19
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Rahman S, Chowdhury D. Guar gum-sodium alginate nanocomposite film as a smart fluorescence-based humidity sensor: A smart packaging material. Int J Biol Macromol 2022; 216:571-582. [PMID: 35803412 DOI: 10.1016/j.ijbiomac.2022.07.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 06/30/2022] [Accepted: 07/01/2022] [Indexed: 12/14/2022]
Abstract
Perishable packed foods are easily damaged by the change in relative humidity. In this work, we demonstrate that guar gum- sodium alginate blending with glucose-glycerol carbon dots nanocomposite film can be used to detect relative humidity. The fabricated nanocomposite film was an excellent smart sensor based on the fluorescence 'on-off' mechanisms against humidity. The study demonstrates that at different relative humidity conditions, such as 11 %, 33 %, 75.30 %, 84 %, and 97 %, there is a change in the fluorescence of biocomposite films under UV light. The practical feasibility of the biocomposite developed film was tested in real conditions by placing a piece of bread with high humidity conditions wrapped with the developed nanocomposite film. It was observed that under such conditions, marked quenching of fluorescence was observed and hence detection of humidity was possible. Hence, the fabricated nanocomposite film can monitor the packed food freshness using just a UV light source. Such biopolymer nanocomposite is potential materials and may find application as smart packaging materials, especially as food packaging materials.
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Affiliation(s)
- Sazzadur Rahman
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, India.
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20
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Phukan K, Devi R, Chowdhury D. Insights into Anti-Inflammatory Activity and Internalization Pathway of Onion Peel-Derived Gold Nano Bioconjugates in RAW 264.7 Macrophages. ACS Omega 2022; 7:7606-7615. [PMID: 35284751 PMCID: PMC8908513 DOI: 10.1021/acsomega.1c06131] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 12/31/2021] [Indexed: 05/28/2023]
Abstract
Green synthesis of nanoparticles plays an important role in their efficient therapeutic effects in various biomedical applications. Here, we prepared gold nano bioconjugates (GNBCs) from the ethyl acetate fraction of onion peels and investigated their anti-inflammatory activity in lipopolysaccharide-stimulated RAW 264.7 macrophages. The GNBCs were characterized by UV-visible spectroscopy, dynamic light scattering, and transmission electron microscopy. Comparative studies have been conducted among GNBCs, fractionate alone [onion peel drug (OPD)], and the standard drug dexamethasone in various anti-inflammatory assays. It was observed that GNBCs showed comparatively good therapeutic efficacy than the fractionate alone. At the lowest 10 μg/mL concentration, the GNBC and OPD exhibited 70.86 and 91.98% of reactive oxygen species production, 10.88 and 20.97 ng/μL of nitrite production, 337 and 378 pg/mL of TNF-α production, 27.1 and 30.64 pg/mL of IL-6 production, respectively, by maintaining a satisfactory cell viability. Moreover, to understand the mechanistic pathway of GNBCs in their entry into the macrophages, their localization, and duration, uptake studies have been performed where a caveolar-mediated endocytosis pathway is found to be prominent. Hence, this study will lead to the development of cheap, green synthesis of nano bioconjugates and their role in inflammation.
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Affiliation(s)
- Kabyashree Phukan
- Material
Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, Assam, India
| | - Rajlakshmi Devi
- Life
Sciences Division, Institute of Advanced
Study in Science and Technology, Paschim
Boragaon, Garchuk, Guwahati 781035 Assam, India
| | - Devasish Chowdhury
- Material
Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, Assam, India
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21
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Boruah JS, Sankaranarayanan K, Chowdhury D. Insight into carbon quantum dot-vesicles interactions: role of functional groups. RSC Adv 2022; 12:4382-4394. [PMID: 35425434 PMCID: PMC8981176 DOI: 10.1039/d1ra08809b] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 01/10/2022] [Indexed: 01/09/2023] Open
Abstract
Understanding carbon quantum dot–cell membrane interaction is essential for designing an effective nanoparticle-based drug delivery system. In this study, an attempt has been made to study the interaction involving phosphatidylcholine vesicles (PHOS VES, as model cell membrane) and four different carbon quantum dots bearing different functional groups (–COOH, –NH2, –OH, and protein bovine serum albumin coated) using various tools such as PL behavior, surface charge on vesicles, QCM, ITC, TEM, LSV, and FTIR. From the above studies, it was observed that the –NH2 terminating carbon dots were capable of binding strongly with the vesicles whereas other functional groups bearing carbon dots were not significantly interacting. This observation was also supported by direct visual evidence as shown by transmission electron microscopy, which shows that the polyethyleneimine carbon dot (PEICD) bearing –NH2 functionality has greater affinity towards PHOS VES. The mechanistic insight presented in the paper indicates greater possibility of higher H-bonding, signifying better interaction between –NH2 functionalized carbon dots and PHOS VES supported by FTIR, QCM, ITC and TEM. Moreover, the transport of neurotransmitters (which are generally amine compound) in neurons for cellular communication through synapse is only possible through vesicular platforms, showing that in our body, such interactions are already present. Such studies on the nano–bio interface will help biomedical researchers design efficient carbon-based nanomaterial as drug/gene delivery vehicles. An interaction study at the nano–bio interface involving phosphatidylcholine vesicles (as a model cell membrane) and four different carbon dots bearing different functional groups (–COOH, –NH2, –OH, and BSA-coated).![]()
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Affiliation(s)
- Jayanta S Boruah
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 India.,Department of Chemistry, Cotton University Guwahati Assam India
| | - Kamatchi Sankaranarayanan
- Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 India
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22
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Phukan K, Sarma RR, Dash S, Devi R, Chowdhury D. Carbon dot based nucleus targeted fluorescence imaging and detection of nuclear hydrogen peroxide in living cells. Nanoscale Adv 2021; 4:138-149. [PMID: 36132963 PMCID: PMC9416979 DOI: 10.1039/d1na00617g] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 10/18/2021] [Indexed: 05/11/2023]
Abstract
Investigation of the intracellular generation of H2O2, one of the most important reactive oxygen species (ROS), is crucial for preventing various diseases since it is closely linked with different physiological and complex cell signaling pathways. Despite the development of various fluorescent probes, the majority of the fluorescent probes cannot move across the nuclear membrane. However, detection of the nuclear level of H2O2 is very important since it can directly cause oxidative DNA damage which ultimately leads to various diseases. Therefore, in this study, p-phenylenediamine based carbon quantum dots (B-PPD CDs) have been synthesized and integrated with 4-formylbenzeneboronic acid as a doping agent for the detection of H2O2. The detection mechanism showed that, upon exposure to H2O2, the fluorescence of the B-PPD CDs was immediately quenched. Further investigation has been done in the in vitro RAW 264.7 cell line by both exogenous and endogenous exposure of H2O2 to demonstrate the feasibility of the method. It is shown successfully that the exogenous presence and endogenous generation of H2O2 in RAW 264.7 cells can be detected using B-PPD CDs. The limit of detection (LOD) was determined to be 0.242 μM. The development of such imaging probes using carbon quantum dots will lead to live-cell imaging as well as ROS detection.
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Affiliation(s)
- Kabyashree Phukan
- Material Nanochemistry Laboratory, Physical Sciences Division India +91 3612270095
| | - Ritwick Ranjan Sarma
- Material Nanochemistry Laboratory, Physical Sciences Division India +91 3612270095
| | - Somarani Dash
- Life Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati-781035 India
| | - Rajlakshmi Devi
- Life Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati-781035 India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division India +91 3612270095
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23
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Rahman S, Konwar A, Majumdar G, Chowdhury D. Guar gum-chitosan composite film as excellent material for packaging application. Carbohydrate Polymer Technologies and Applications 2021. [DOI: 10.1016/j.carpta.2021.100158] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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24
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Behere PB, Behere AP, Chowdhury D. Did psychopathology in Indian psychiatric patients change following the COVID-19 pandemic? Indian J Psychiatry 2021; 63:500-502. [PMID: 34789939 PMCID: PMC8522614 DOI: 10.4103/indianjpsychiatry.indianjpsychiatry_790_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 09/29/2021] [Indexed: 11/16/2022] Open
Affiliation(s)
- Prakash B Behere
- Former Vice Chancellor, D Y Patil University, Kolhapur, India.,Department of Psychiatry, Jawaharlal Nehru Medical College, Datta Meghe Institute of Medical Sciences (Deemed University), Wardha, Maharashtra, India
| | - A P Behere
- Department of Pediatrics and Human Development, Helen DeVos Children's Hospital, Michigan State University College of Human Medicine, Grand Rapids MI, USA.,Department of Psychiatry, Datta Meghe Institute of Medical Sciences (Deemed University), Wardha, Maharashtra, India
| | - D Chowdhury
- Department of Psychiatry, Jawaharlal Nehru Medical College, Datta Meghe Institute of Medical Sciences (Deemed University), Wardha, Maharashtra, India
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25
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Boruah JS, Devi C, Hazarika U, Bhaskar Reddy PV, Chowdhury D, Barthakur M, Kalita P. Green synthesis of gold nanoparticles using an antiepileptic plant extract: in vitro biological and photo-catalytic activities. RSC Adv 2021; 11:28029-28041. [PMID: 35480751 PMCID: PMC9038048 DOI: 10.1039/d1ra02669k] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 07/28/2021] [Indexed: 01/02/2023] Open
Abstract
Gold nanoparticles are one of the widely used metallic nanoparticle having unique surface plasmon characteristic, offers major utility in biomedical and therapeutic fields. However, chemically synthesized nanoparticle creates toxicity in the living organisms and contradicts the eco-friendly and cost-effective nature. So, developing greener synthetic route for synthesis of gold nanoparticle using natural materials is an enthralling field of research for its effectiveness in synthesizing eco-friendly, non-toxic materials. Moreover, biological components attached as stabilizing agent can exert its own effect along with the advantages of nanoparticle conjugation. In this work, we used for the first time methanolic leaf extract of Moringa oleifera as this fraction of M. oleifera exerts a neuroactive modulation against seizure as evidenced by earlier literature. The green gold nanoparticles synthesized were characterized by different characterization tools, dynamic light scattering and transmission electron microscopy techniques etc. Prepared nanoparticles were biologically (antioxidant, antimicrobial and blood cytotoxicity) characterized to screen their further utility in therapeutic strategies. Characteristics and activities of green gold nanoparticles were compared with conventional citrate stabilized gold nanoparticles. It was observed that green gold nanoparticles prepared using M. oleifera show less cytotoxicity and helps in regeneration of neuronal cells in animal model study. It establishes the fact that conjugation of different plant extract fraction for stabilization of gold nanoparticle may be responsible factor for enhancement of bioactive nature of green gold nanoparticle. In addition, the green gold nanoparticle show efficient photo-catalytic efficiency. Development of such bioactive gold nanoparticles will lead to functional materials for biomedical and therapeutic applications. Gold nanoparticles are one of the widely used metallic nanoparticle having unique surface plasmon characteristic, offers major utility in biomedical and therapeutic fields.![]()
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Affiliation(s)
- Jayanta S Boruah
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 India .,Department of Chemistry, Cotton University Assam India
| | - Chayanika Devi
- Department of Life Science and Bioinformatics, Assam University, Diphu Campus Diphu Assam India
| | - Upasana Hazarika
- Department of Biophysics, Pub Kamrup College Baihata Chariali Assam India
| | - P Vijaya Bhaskar Reddy
- Department of Life Science and Bioinformatics, Assam University, Diphu Campus Diphu Assam India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 India
| | - Manash Barthakur
- Department of Zoology, Pub Kamrup College Baihata Chariali Assam India
| | - Pankaj Kalita
- Department of Zoology, Eastern Karbi Anglong College Karbi Anglong Assam India
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26
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Chowdhury D, Kopeika Y. P–761 Can modified luteal support in fresh cycle after agonist trigger “rescue” the cumulative live birth rate (CLBR) in high responders. Hum Reprod 2021. [DOI: 10.1093/humrep/deab130.760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Study question
Can modified luteal support in fresh cycle “rescue” the cumulative live birth rate (CLBR) in high responders who receive agonist trigger?
Summary answer
Live birth rate in high responders who had agonist trigger in fresh cycle was significantly reduced despite modified luteal support.
What is known already
Previous studies, including small randomised controlled trials, claimed that good live birth rate could be achieved at fresh transfer in “high responders” who had GnRHa trigger with modified luteal phase support. However, majority of these studies exclude the true high responders (patients with 20 and above oocytes) and average number of collected eggs reported in many of these studies in the range of 9 to 12. The data on outcome of fresh transfer in true high responders is very limited.
Study design, size, duration
A prospective observational study was conducted in 407 patients, aged 23–42 years who were expected to be at risk of high response (AFC>18, AMH>20 pmol/l) undergoing controlled ovarian stimulation between 2014–2019 triggered either with HCG or GnRH agonist. Live birth rate (LBR) in a fresh and subsequent 3 frozen transfers were compared in groups with different triggers and freeze all.
Participants/materials, setting, methods
Patients were stimulated in short antagonist protocol. The trigger was chosen based on the background characteristics, peak oestradiol and clinician discretion. Triggering was achieved either with 0.5 mg buserelin (GnRHa) 0.5mgin 230 patients (A) or with 250 mcg of hCG(H) in 177 patients. Modified luteal support included vaginal progesterone, oral oestrogen and 1500 iu of hCG on the day of egg retrieval. The later was omitted with more than 20 oocytes.
Main results and the role of chance
The mean age, AFC, number of previous cycles, number of embryos transferred were 33.3, 22.4, 0.26 and 1.2 respectively and did not have significant difference between different triggers. Whereas AMH (53 pmol/l (A) vs 43.1 pmol/l (H), P = 0.003), peak oestradiol (15140.74 (A) vs 9738.59 (H), P = 5.59X10–14), and number of oocytes collected (21 vs.17, P = 5.63X10–7) were significantly higher in GnRHa group. Seventeen patients in buserelin group had elective freeze all. Ovarian Hyperstimulation Syndrome (OHSS) rate was 3.9% in buserelin group (more then half of these cases had a bolus of hCG at egg collection; most were mild/moderate). On the other hand, hCG group had 2.5% of OHSS (all severe). Live birth rate in fresh cycle was 31% in hCG and 21% in GnRHa groups. If freeze all was undertaken in fresh cycle after GnRHa trigger, then LBR in the first frozen cycle of this group was 53% (P = 0.003, fresh vs frozen GnRHa group). CLBR was not different between GnRHa and hCG groups (51%). However, this was significantly lower than CLBR in GnRHa trigger freeze all group 76% (P = 0.03)
Limitations, reasons for caution
The limitation of this study is its non-randomised nature. However, since it is one of the biggest studies for high responders it has a power to minimise bias by adjusting for multiple variables.
Wider implications of the findings: Proceeding with fresh transfer in high responders after GnRHa trigger with modified luteal support not only maintains the risk of OHSS (equivalent to hCG group) but also significantly impairs the LBR not compensated even after 3 subsequent frozen embryo transfers. Therefore, freeze-all approach should be preferred in this group.
Trial registration number
NA
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Affiliation(s)
- D Chowdhury
- Guy’s Hospital, Assisted Conception Unit, London, United Kingdom
| | - Y Kopeika
- Guy’s Hospital, Assisted Conception Unit, London, United Kingdom
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27
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Phukan K, Devi R, Chowdhury D. Green Synthesis of Gold Nano-bioconjugates from Onion Peel Extract and Evaluation of Their Antioxidant, Anti-inflammatory, and Cytotoxic Studies. ACS Omega 2021; 6:17811-17823. [PMID: 34308016 PMCID: PMC8296016 DOI: 10.1021/acsomega.1c00861] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 06/10/2021] [Indexed: 05/04/2023]
Abstract
Plant secondary metabolites such as flavonoids demonstrate high degrees of antioxidant, anti-inflammatory, and anticancer activities. Among flavonoids, quercetin plays an important role in inflammation by downregulating the level of various cytokines. Thereby, in this work, onion (Allium cepa) peel was successfully utilized for the synthesis of gold nano-bioconjugates acting as a natural therapeutic drug. In this process, crude onion peel extract was first divided into different fractionates, namely, ethyl acetate, butanol, methanol, and water, and they were subjected to various preliminary studies of antioxidant activities. The ethyl acetate fractionate shows high antioxidant activities in all the assays. The bioactive components were identified and found to contain a high amount of quercetin as confirmed by liquid chromatography with tandem mass spectrometry and high-performance liquid chromatogrpahy. Three gold nano-bioconjugates were prepared with different concentrations of the ethyl acetate fractionate. Various biochemical anti-inflammatory assays were carried out and compared with the active ethyl acetate fraction of the onion peel drug (OPD). The cytotoxicity of the nano-bioconjugate system and the OPD was checked in the myoblast L6 cell line from skeletal muscle tissues to evaluate the toxicity. All the three nano-bioconjugates A, B, and E demonstrated high percentages of cell viability, viz., 73.07, 72.3, and 69.15%, respectively, at their highest concentration of 200 μg/mL. The OPD also showed 88.56% cell viability with no toxic effects in the myoblast L6 cell line from skeletal muscle tissues. The reactive oxygen species reduction of nano-bioconjugate B showed a marked reduction of 76.77% at a maximum concentration of 200 μg/mL, whereas the OPD showed 68.17%. Hence, through this work, a cheap source of nano-bioconjugates is developed, which can act as a potent antioxidant and anti-inflammatory agent and are more active in comparison to the OPD alone.
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Affiliation(s)
- Kabyashree Phukan
- Material
Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, India
| | - Rajlakshmi Devi
- Life
Sciences Division, Institute of Advanced
Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, India
| | - Devasish Chowdhury
- Material
Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, India
- . Tel.: +91 361 2912073. Fax: +91 361 2279909
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Barman K, Dutta P, Chowdhury D, Baruah PK. Green Biosynthesis of Copper Oxide Nanoparticles Using Waste Colocasia esculenta Leaves Extract and Their Application as Recyclable Catalyst Towards the Synthesis of 1,2,3-triazoles. BioNanoSci 2021. [DOI: 10.1007/s12668-021-00826-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Chowdhury D. Silver Trauma- a true challenging entity. IJMBS 2020. [DOI: 10.32553/ijmbs.v4i12.1585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Historically trauma has been identified as the leading cause of death in the younger under 40’s population (1). However, with an aging population there is a higher incidence of trauma sustained in the elderly population. Silver trauma is defined as elderly patient of retirement age or over the age of 65 years. This has been taken into consideration when trauma guidelines have been incorporated. To name a few examples, the CCSR (Canadian C-spine rule) includes the at-risk population as those >/= 65 years of age in the context of potential cervical spine injury. In various major trauma trial tools, the >65 years of age group are considered to be a high risk of deteoriation group. Through clinical practice clinicians have noted that in this group of patients’ injuries can be missed which would be detrimental to the overall outcome of these patients.
Through this article I aim to highlight the main issues that make the initial management of the elderly trauma patient at times challenging. Furthermore, suggestion for potential management strategies will also be highlighted.
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Dhupal M, Chowdhury D. Phytochemical-Based Nanomedicine for Advanced Cancer Theranostics: Perspectives on Clinical Trials to Clinical Use. Int J Nanomedicine 2020; 15:9125-9157. [PMID: 33244231 PMCID: PMC7683832 DOI: 10.2147/ijn.s259628] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 09/12/2020] [Indexed: 12/24/2022] Open
Abstract
In the current chapter, a new strategic compilation of phytochemicals with potent antitumor properties has been addressed, most importantly focusing on cell cycle arrest and apoptotic signaling mechanism. A promising approach in tumor prevention is to eliminate cancer cells preferably via cell cycle arrest and programmed cell death with lesser harm to neighboring normal cells. Cancer cells have a survival advantage to escape apoptosis and relentlessly divide to proliferate, gearing up the cell cycle process. Recently, the use of phytochemical-derived conjugated chemotherapeutic agents has increased dramatically owing to its biocompatibility, low cytotoxicity, low resistance, and dynamic physiochemical properties discriminating normal cells in the treatment of various cancer types. For decades, biomedical investigations have targeted cell cycle and apoptotic cell death mechanism as an effective cancer-killing tool for systemically assessing the potential biological interactions of functional phytocompounds compared to its synthetic counterparts during their complete life cycles from entry, biodistribution, cellular/molecular interactions to excretion. Newly emerging nanotechnology application in anticancer drug formulations has revolutionized cancer therapy. Tissue-specific phyto-nanomedicine plays a vital role in advanced cancer diagnostics using liposome, micelle, and nanoparticles as a precise and effective delivery vehicle. This chapter specifically focuses on the therapeutic phytomolecules approved by the Food and Drug Administration (FDA, USA) along with phyto-chemopreventives currently on clinical trials (Phase-I/II/III/IV). Besides, detailed coverage is given to the FDA-approved nanotechnology-based formulations only in the areas of cancer theranostics via cell cycle arrest and apoptotic pathways including present challenges and future perspectives.
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Affiliation(s)
- Madhusmita Dhupal
- Department of Microbiology, Wonju College of Medicine, Yonsei University, Wonju26426, Republic of Korea
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Guwahati781035, India
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Nowicka Z, Tomasik B, Kozono D, Stawiski K, Johnson T, Haas-Kogan D, Ussowicz M, Chowdhury D, Fendler W. Serum Circulating MicroRNAs as Functional Biodosimeters in Patients Undergoing Total Body Irradiation. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Gogoi J, Shishodia S, Chowdhury D. Tunable electrical properties of carbon dot doped photo-responsive azobenzene-clay nanocomposites. RSC Adv 2020; 10:37545-37554. [PMID: 35521280 PMCID: PMC9057113 DOI: 10.1039/d0ra07386e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 09/28/2020] [Indexed: 12/15/2022] Open
Abstract
The development of photo-responsive nanocomposite materials is important in the fabrication of optoelectronic devices. In this work, we fabricated a carbon dot doped azobenzene–clay nanocomposite which possesses different ac conductivity with and without UV treatment. At first, azobenzene nanoclusters were synthesised and then successfully used to make an azobenzene–clay nanocomposite. It was observed that there is a small change in the ac conductivity of the azobenzene–clay nanocomposite with and without UV treatment. However, this change in ac photoconductivity can be enhanced in the azobenzene–clay nanocomposite by doping with electron-rich cysteine and methionine carbon dots. Hence, ac conductivity properties of the carbon-doped azobenzene–clay nanocomposite can be tuned using UV light. Impedance measurements were determined using Electrochemical Impedance Spectroscopy. Mechanistic insight into the phenomenon is also discussed in the paper. Thus fabrication of tunable carbon dot doped photo-responsive azobenzene–clay nanocomposites will lead to the use of carbon dot doped azobenzene–clay nanocomposites in photo-switchable optoelectronic devices. We demonstrate successful fabrication of an azobenzene–clay nanocomposite doped with electron-rich cysteine and methionine carbon dots with photo-switchable ac conductivity.![]()
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Affiliation(s)
- Jahnabi Gogoi
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 India +91 361 2279909 +91 361 2912073
| | - Shubham Shishodia
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 India +91 361 2279909 +91 361 2912073
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 India +91 361 2279909 +91 361 2912073
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Upadhyaya S, Konwar A, Chowdhury D, Sarma NS. High-performance water-borne fluorescent acrylic-based adhesive: synthesis and application. RSC Adv 2020; 10:25408-25417. [PMID: 35518622 PMCID: PMC9055326 DOI: 10.1039/d0ra03782f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 06/16/2020] [Indexed: 01/13/2023] Open
Abstract
Water-borne adhesives have immense importance in cellulose-based materials, where their durability, handling, and strength remain to be a major concern. The present work demonstrates the development of three water-borne adhesives, namely, poly(1-vinyl-2-pyrrolidone-co-acrylic acid), poly(acrylonitrile-co-acrylic acid), and poly(1-vinyl-2-pyrrolidone-co-acrylonitrile-co-acrylic acid) applicable for cellulose-based materials. These acrylic-acid based adhesives were characterized by Fourier-transform infra-red spectroscopy, thermogravimetric analysis, X-ray diffraction, gel permeation chromatography, and universal testing machine. The synthesized polymer adhesives can be stored in the powder form for a longer period, thus utilizing less space. In order to use as adhesives, suitable formulations can be prepared in water. The adhesives show thermal stability up to 300 °C. Our studies show that poly(1-vinyl-2-pyrrolidone-co-acrylonitrile-co-acrylic acid) showed higher lap shear strength (ASTM D-906) than commercially available adhesives. In addition, these adhesives, being fluorescent in nature, can be detected under UV light and thus are applicable for the detection of fractured joints of any specimen. This property also helps in anti-counterfeiting applications, thus adding further to their utility. Synthesis and application of a water-borne fluorescent acrylic adhesive, which can be stored as a powder for long-term use.![]()
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Affiliation(s)
- Samiran Upadhyaya
- Advanced Materials Laboratory, Institute of Advanced Study in Science and Technology Paschim Boragaon Guwahati-35 Assam India
| | - Achyut Konwar
- Materials Nanochemistry Laboratory, Institute of Advanced Study in Science and Technology Paschim Boragaon Guwahati-35 Assam India
| | - Devasish Chowdhury
- Materials Nanochemistry Laboratory, Institute of Advanced Study in Science and Technology Paschim Boragaon Guwahati-35 Assam India
| | - Neelotpal Sen Sarma
- Advanced Materials Laboratory, Institute of Advanced Study in Science and Technology Paschim Boragaon Guwahati-35 Assam India
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Wheatley-Price P, Laurie K, Zhang T, Bossé D, Chowdhury D. The most important attribute: stakeholder perspectives on what matters most in a physician. ACTA ACUST UNITED AC 2020; 27:100-106. [PMID: 32489252 DOI: 10.3747/co.27.5489] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background Most people can think of important attributes that they believe physicians should have. The canmeds framework defines domains of attributes in medical training (Leader, Medical Expert, Scholar, Communicator, Advocate, Collaborator, and Professional). Whether some are more valued by various stakeholders is unknown. Previous research has shown that patients can receive suboptimal care if physician and patient expectations of a health care encounter differ. In the present study, we sought to identify what various stakeholders identified as the single most important attribute for a physician to possess. Methods A simple survey asked the question "What is the single most important attribute a physician should have?" at a single academic teaching hospital and affiliated medical school. The survey was administered to medical students, doctors, nurses, patients, and caregivers. Age and sex were also collected. Responses were assigned to domains and analyzed to identify trends. The primary outcome is a descriptive analysis of the findings. Results From 362 individuals who responded, 109 different responses were obtained. The single most common answer was "compassion" (n = 86). Responses were categorized into these 5 domains: Caring, n = 209; Professional or Collaborator, n = 58; Medical Expert, n = 54; Communicator, n = 32; and Other, n = 9. Compared with men, women chose attributes in the Caring domain more frequently (64% vs. 49%), although that domain was the most popular for both sexes. Medical students were less likely to highly value Communicator attributes. Conclusions All stakeholder group identified attributes in the Caring domain as being most important. Although all canmeds roles are important, our research highlights the priorities of stakeholders.
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Affiliation(s)
- P Wheatley-Price
- Department of Medicine, University of Ottawa, Ottawa, ON.,The Ottawa Hospital Research Institute, Ottawa, ON
| | - K Laurie
- Department of Medicine, University of Ottawa, Ottawa, ON
| | - T Zhang
- The Ottawa Hospital Research Institute, Ottawa, ON
| | - D Bossé
- Department of Medicine, University of Ottawa, Ottawa, ON.,The Ottawa Hospital Research Institute, Ottawa, ON
| | - D Chowdhury
- Department of Medicine, University of Ottawa, Ottawa, ON
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Abstract
Mutagenic and Carcinogenic substances are a threat to any living organism, and its detection is of paramount importance. In this work, we fabricate for the first time a DNA-carbon dots based electrochemical biosensor for sensitive and selective detection of mutagenic nitrosamines like N-nitrosodimethylamine (NDMA) and N-nitrosodiethanolamine (NDEA). At first, on the glassy carbon electrode (GCE), chitosan carbon dot was deposited, then, DNA was electro-statically immobilizing on the surface of carbon dots to fabricate the sensing electrode (DNA/chiCD/GCE modified electrode). In the presence of NDMA and NDEA, in differential pulse voltammetry technique, the absolute peak current increases, and thus it can detect NDMA and NDEA. The system DNA/chiCD/GCE modified electrode is highly selective and sensitive toward NDMA and NDEA. The detection limit was determined to be 9.9 × 10-9 M and 9.6 × 10-9 M, respectively. The possible reason for DNA/chiCD/GCE modified electrode showing such electrochemical selectivity toward nitrosamines is investigated and discussed.
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Affiliation(s)
- Sristi Majumdar
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, India
| | - Debajit Thakur
- Life Sciences Division Institute of Advanced Study in Science and Technology, Garchuk, Guwahati 781035, India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, India
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Barman K, Chowdhury D, Baruah PK. Development of β‐carotene loaded nanoemulsion using the industrial waste of orange (Citrus reticulate) peel to improve in vitro bioaccessibility of carotenoids and use as natural food colorant. J FOOD PROCESS PRES 2020. [DOI: 10.1111/jfpp.14429] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kailash Barman
- Department of Applied Sciences GUIST, Gauhati University Assam India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory Institute of Advanced Study in Science and Technology Assam India
| | - Pranjal K. Baruah
- Department of Applied Sciences GUIST, Gauhati University Assam India
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Aslam N, Rashid Z, Mohsin M, Chowdhury D, Sultan Hasan B. P1727 Large coronary artery to pulmonary artery fistula as primary source of pulmonary blood supply in tetralogy of fallot with pulmonary atresia. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.1195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Funding Acknowledgements
Not Applicable
OnBehalf
Not Applicable
Introduction
Pulmonary blood supply in patients of Tetralogy of Fallot with pulmonary atresia is usually from patent arterial duct or major aortopulmonary collaterals (MAPCAs) arising from descending thoracic aorta. We describe a case in which large coronary to pulmonary artery fistula was the primary source of pulmonary blood supply.
Case Report
A 17 years old female was referred to our hospital for diagnostic workup of suspected congenital heart disease. She was previously undiagnosed and now complains of progressive shortness of breath for last few months.
On physical examination she was non-dysmorphic with oxygen saturation of ∼ 77 % in room air, blood pressure of ∼ 117/72 mmHg, pulse rate of ∼ 89 beats per minute and respiratory rate of ∼ 24 breaths per minute. She was clinically cyanosed with grade 3 clubbing and polycythemic. Cardiovascular examination revealed quiet precordium with normally placed apex beat, grade 2 parasternal heave with single second heart sound and grade 3/6 continuous murmur along left mid sternal border.
Twelve lead electrocardiogram (ECG) showed normal sinus rhythm, right axis deviation and right ventricular hypertrophy. There was no evidence of ischemia. Chest X-ray revealed "boat shaped heart" with oligaemic lung fields. Transthoracic echocardiography showed large conoventricular ventricular septal defect with bidirectional flow. There was aortic over-ride with dilated left main coronary artery. No forward flow was seen across right ventricular outflow tract. Considering hugely dilated left main coronary artery, suspicion of coronary to pulmonary artery fistula was made and cardiac computed tomography followed by conventional angiography was done, both confirmed the diagnosis of Tetralogy of Fallot with pulmonary atresia and large coronary artery to main pulmonary artery fistula as a primary pulmonary blood supply. Two small collaterals (MAPCAs) were also identified supplying small part of right and left lungs.
Conclusion
This case highlights unusual source of pulmonary blood supply in Tetralogy of Fallot with pulmonary atresia. Correct pre-operative diagnosis is essential for appropriate surgical planning and better outcome.
Abstract P1727 Figure. TOF-PA with CA to PA Fistula
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Affiliation(s)
- N Aslam
- Aga Khan University, Karachi, Pakistan
| | - Z Rashid
- Aga Khan University, Karachi, Pakistan
| | - M Mohsin
- Aga Khan University, Karachi, Pakistan
| | - D Chowdhury
- Cardiology Care for Children, Lancaster, United States of America
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Paul B, Das A, Mandal R, Singh P, Adhikari S, Ghosh K, Chowdhury D, Chakrabarti P, Giri S. Protein requirement of Ompok bimaculatus (Bloch, 1794) larvae. ANIM NUTR FEED TECHN 2020. [DOI: 10.5958/0974-181x.2020.00046.3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Deb A, Saikia R, Chowdhury D. Nano-Bioconjugate Film from Aloe vera To Detect Hazardous Chemicals Used in Cosmetics. ACS Omega 2019; 4:20394-20401. [PMID: 31815243 PMCID: PMC6894156 DOI: 10.1021/acsomega.9b03280] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 10/14/2019] [Indexed: 05/04/2023]
Abstract
It is of utmost importance to detect hazardous chemicals that affect human health. In this work, a simple method has been developed using a traditional medicinal herb Aloe vera as a carbon source to fabricate a nano-bioconjugate film. The nano-bioconjugate system comprises of A. vera gel itself and sodium alginate to form a fluorescent nano-bioconjugate film. The film was successfully used as an optical "turn-off" sensor in detecting analytes viz. para-Aminobenzoic acid (PABA), benzophenone, hydroquinone, and propylparaben, which are used in cosmetics and are listed as "red-listed" chemicals. The applicability of the fluorescent film in detecting these hazardous chemicals was even assessed with some locally purchased cosmetic samples. Mechanistic insight into the fluorescent quenching shown by nano-bioconjugate film is also discussed. Developments of such a detection system from sustainable sources make it an interesting option for fabricating sensors for hazardous chemicals.
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Affiliation(s)
- Ankita Deb
- Material Nanochemistry Laboratory,
Physical Sciences Division, Institute of
Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, India
| | - Rasna Saikia
- Material Nanochemistry Laboratory,
Physical Sciences Division, Institute of
Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory,
Physical Sciences Division, Institute of
Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781035, India
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Chowdhury D, Wang C, Lu A, Zhu H. Quantitatively decoding the circadian transcriptional regulations: an advanced approach in sleep medicine. Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Alagarasu K, Patil JA, Kakade MB, More AM, Bote M, Chowdhury D, Seervi M, Rajesh NT, Ashok M, Anukumar B, Abraham AM, Parashar D, Shah PS. Spatio-temporal distribution analysis of circulating genotypes of dengue virus type 1 in western and southern states of India by a one-step real-time RT-PCR assay. Infect Genet Evol 2019; 75:103989. [PMID: 31376506 PMCID: PMC6832813 DOI: 10.1016/j.meegid.2019.103989] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 07/29/2019] [Accepted: 07/31/2019] [Indexed: 11/19/2022]
Abstract
Dengue virus type 1 (DENV-1) Asian and American/African (AM/AF) genotypes were reported to be co-circulating in southern and western states of India based on envelope (E) gene sequencing of few representative samples. The objective of the present study was to develop a one-step real-time RT-PCR to discriminate between Asian and AM/AF genotypes of DENV-1 and investigate the spatio-temporal distribution of the DENV-1 genotypes in southern and western states of India. A one-step real-time RT-PCR to discriminate the Asian and AM/AF genotypes of DENV-1 was developed and validated using 40 samples (17 Asian and 23 AM/AF), for which the envelope (E) gene sequence data was available. DENV-2, DENV-3 and DENV-4 isolates, one each and DENV negative samples (n = 17) were also tested by the assay. Additional 296 samples positive for DENV-1 from selected Southern and Western states of India were genotyped using the real-time RT-PCR assay. Among the samples used for validation, the genotyping results were concordant with sequencing results for 39 samples. In the one discordant sample which was positive for AM/AF by sequencing, the genotyping assay tested positive for both Asian and AM/AF genotype. DENV-2, DENV-3 and DENV-4 isolates were not reactive in the assay. None of the DENV negative samples were positive (sensitivity 100% and specificity 98.2%). A total of 336 samples (40 samples with sequence data and 296 samples without sequence data) were used for spatio-temporal distribution analysis. The results revealed that the Asian genotype was the predominant genotype in Tamil Nadu and Kerala, the southern states. The AM/AF genotype was the predominant genotype in Maharashtra, a western state of India. In Nashik district of Maharashtra, Asian genotype was observed in 32.6% of DENV-1 samples during 2017 while the same decreased to 7.3% during 2018. In Pune district, Asian genotype was observed in 40.0% of DENV-1 samples during 2018 only. To conclude, a one step real-time RT-PCR has been developed for discriminating Asian and AM/AF genotypes of DENV-1. This assay can act as a complement to sequencing but not a substitute and can be utilized in resource limited settings for molecular surveillance of DENV-1. DENV-1 Asian genotype was the dominant genotype in South India while, AM/AF genotype was dominant in Western India.
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Affiliation(s)
- K Alagarasu
- Dengue/Chikungunya Group, ICMR-National Institute of Virology, Pune, Maharashtra, India.
| | - J A Patil
- Dengue/Chikungunya Group, ICMR-National Institute of Virology, Pune, Maharashtra, India
| | - M B Kakade
- Dengue/Chikungunya Group, ICMR-National Institute of Virology, Pune, Maharashtra, India
| | - A M More
- Dengue/Chikungunya Group, ICMR-National Institute of Virology, Pune, Maharashtra, India
| | - M Bote
- Dengue/Chikungunya Group, ICMR-National Institute of Virology, Pune, Maharashtra, India
| | - D Chowdhury
- Dengue/Chikungunya Group, ICMR-National Institute of Virology, Pune, Maharashtra, India
| | - M Seervi
- Dengue/Chikungunya Group, ICMR-National Institute of Virology, Pune, Maharashtra, India
| | - N T Rajesh
- PSG Institute of Medical Sciences and Research, Coimbatore, Tamil Nadu, India
| | - M Ashok
- ICMR-National Institute of Virology, Bangalore Field Unit, Bengaluru, Karnataka, India
| | - B Anukumar
- ICMR-National Institute of Virology, Kerala Field Unit, Alappuzha, Kerala, India
| | - A M Abraham
- Christian Medical College, Vellore, Tamil Nadu, India
| | - D Parashar
- Dengue/Chikungunya Group, ICMR-National Institute of Virology, Pune, Maharashtra, India
| | - P S Shah
- Dengue/Chikungunya Group, ICMR-National Institute of Virology, Pune, Maharashtra, India
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Barman K, Chowdhury D, Baruah PK. Bio-synthesized silver nanoparticles using Zingiber officinale rhizome extract as efficient catalyst for the degradation of environmental pollutants. INORG NANO-MET CHEM 2019. [DOI: 10.1080/24701556.2019.1661468] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Kailash Barman
- Department of Applied Sciences, GUIST, Gauhati University, Guwahati, Assam, India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Institute of Advanced Study in Science and Technology, Guwahati, Assam, India
| | - Pranjal K. Baruah
- Department of Applied Sciences, GUIST, Gauhati University, Guwahati, Assam, India
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Konwar A, Deb A, Kar A, Chowdhury D. Dual emission carbon dots from carotenoids: Converting a single emission to dual emission. LUMINESCENCE 2019; 34:790-795. [PMID: 31397062 DOI: 10.1002/bio.3685] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 06/10/2019] [Accepted: 06/30/2019] [Indexed: 11/10/2022]
Abstract
Dual emission carbon dots have a high potential for use as fluorescence-based sensors with higher selectivity and sensitivity. This study demonstrated the possibility of conversion of a biological molecular system with a single emission peak to a double emission carbon dots system. This report is the first to describe the synthesis of dual emission carbon dots by tuning the electronic environment of a conjugated system. Here we prepared carbon dots from a natural extract, from which carotenoids were used as a new source for carbon dots. Formation of the carbon dots was confirmed by images obtained under a transmission electron microscope as well as from a dynamic light scattering study. The prepared carbon dots system was characterized and its optical property was monitored. The study showed that, after irradiation with microwaves, the fluorescence intensity of the whole system changed, without any change in the original peak position of the carotenoid but with the appearance of an additional peak. A Fourier transform infrared study confirmed breaking of the conjugated system. When using ethylene glycol as a surface passivating agent added to these carotenoid carbon dots, the dual emission spectra became more distinct.
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Affiliation(s)
- Achyut Konwar
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati, India
| | - Ankita Deb
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati, India
| | - Archita Kar
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati, India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati, India
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Deka MJ, Dutta P, Sarma S, Medhi OK, Talukdar N, Chowdhury D. Carbon dots derived from water hyacinth and their application as a sensor for pretilachlor. Heliyon 2019; 5:e01985. [PMID: 31338457 PMCID: PMC6626484 DOI: 10.1016/j.heliyon.2019.e01985] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 05/09/2019] [Accepted: 06/18/2019] [Indexed: 11/23/2022] Open
Abstract
Recently,carbon-based nanomaterials have been attracted much interest among the scientific community due to its extraordinary properties and applications. Mostly the fluorescent carbon nanomaterials are prepared from commercially available precursors. In this work, develop a new strategy for producing carbon nanoparticles (carbon dots) using phosphoric acid as an activating agent from water hyacinth present in Assam, India. These carbon nanoparticles show green fluorescence under UV light, and the sizes are found below 10 nm. These carbon dots are applied as a fluorescence sensor for detecting the herbicide (pretilachlor). The developed PL sensor is exclusively selective and sensitive for detection of this herbicide, and the limit of detection is found to be 2.9 μM.This sensor is also tested for real samples like soil contaminated with pretilachlor.
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Affiliation(s)
- Manash Jyoti Deka
- Material Nanochemistry Laboratory, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Guwahati, 7810 35, Assam, India
| | - Parlie Dutta
- Material Nanochemistry Laboratory, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Guwahati, 7810 35, Assam, India
| | - Sewaljyoti Sarma
- Material Nanochemistry Laboratory, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Guwahati, 7810 35, Assam, India
| | - Okhil Kumar Medhi
- Material Nanochemistry Laboratory, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Guwahati, 7810 35, Assam, India
| | - N.C. Talukdar
- Life Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Guwahati, 7810 35, Assam, India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Guwahati, 7810 35, Assam, India
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Affiliation(s)
- Jayanta S. Boruah
- Material Nanochemistry LaboratoryPhysical Sciences DivisionInstitute of Advanced Study in Science and Technology, PaschimBoragaon, Garchuk Guwahati-781035 India
| | - Devasish Chowdhury
- Material Nanochemistry LaboratoryPhysical Sciences DivisionInstitute of Advanced Study in Science and Technology, PaschimBoragaon, Garchuk Guwahati-781035 India
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Chowdhury D, Rahman A, Rashid MH, Chaurasia B, Kamal M, Barua KK. Primary Non-Hodgkin Lymphoma of Sphenoid Sinus Involving Cavernus Sinus and Clivus with Isolated 3rd Nerve Palsy. Mymensingh Med J 2018; 27:888-893. [PMID: 30487511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Lymphomas are group of malignant neoplasm having origins from lymphoreticular cells. B cell Non Hodgkin Lymphoma (BNHL) of sphenoid sinus as primary site for lymphomas are very rare and whenever involves comes usually with ocular manifestations. The proximity of the lesion to optic nerve and cavernous sinus present a high risk of developing unilateral ophthalmoplegia or even blindness. The vast majority of cases of localized sphenoid sinus lymphomas are usually curable to surgery, chemotherapy alone or combination of both, sometimes radiotherapy. Here we report a case of 58 years old male attended at Bangabandhu Sheikh Mujib Medical University (BSMMU) on 9th February 2017 at 9:00 AM having headache and gradually developing ptosis in left eye over 15 days. MRI of brain revealed homogeneously enhancing lesion occupying sphenoid sinus, clivus extending towards left cavernous sinus. Gross total resection of tumor was achieved by endoscopic endonasal approach. Histopathology revealed non-Hodgkin lymphoma and immunohistochemically it was positive for CD 20, CD 45, CD 79 and BCL 2, strongly compatible with diffuse large B cell lymphoma. Treatment with R-CHOP regimen following surgery resulted in initiation of improvement of the condition of the patient. Primary B cell Non-Hodgkin Lymphoma (PBNHL) of the sphenoid sinus is a rare entity which can be perplexing and misleading for a surgeon until the histopathological proof is in hand. Early diagnosis with strong suspicion of sphenoid lymphoma in mind during workouts and timely management, close monitoring and follow ups have high potential for cure and longer disease-free survival of the BNHL patients.
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Affiliation(s)
- D Chowdhury
- Dr Dhiman Chowdhury, Associate Professor, Department of Neurosurgery, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh; E-mail: dhiman_ns@ yahoo.com
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Chowdhury D, Saravanamurthy PS, Chakrabartty A, Purohit S, Iyer SS, Agarwal A, Gopal KM, Mishra P. Vulnerabilities and risks of HIV infection among migrants in the Thane district, India. Public Health 2018; 164:49-56. [PMID: 30189388 DOI: 10.1016/j.puhe.2018.07.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 07/06/2018] [Accepted: 07/16/2018] [Indexed: 10/28/2022]
Abstract
OBJECTIVES To explore the vulnerabilities and risks of HIV infection among female migrants compared with male migrants in the Thane district of Maharashtra, India. STUDY DESIGN This is a cross-sectional epidemiological study. METHODS Data from 35,841 migrants (men 96.2% and women 3.8%) were collected using the web-based 'Migrant Service Delivery System.' The data were then analysed in SPSS, version 23.0. Statistical analysis, including Chi-squared test and multivariate logistic regression, was used to identify factors influencing HIV infection for both male and female migrants. RESULTS It was observed that 2.96% of female migrants had HIV infection compared with 0.77% of male migrants. We found that 12.1% of women consumed alcohol compared with 41.9% of men, and access to bars was 1.5% among women and 3.5% in men. We observed an even larger difference between men and women in their previous history of using brothels for sex; only 5.9% of female migrants reported previously having used brothels for sex, compared with 62.9% of male migrants. Approximately 12.3% of married women and 93.6% of married men had sex with someone other than their spouse. We found that 67.0% of married women and 73.9% of married men reported using a condom during their last sexual act compared with 60.9% of unmarried women and 68.1% of unmarried men. CONCLUSIONS In Thane, female migrants faced higher vulnerabilities and risks of HIV infection than male migrants. Consequently, innovative strategies are required to address these particular needs of female migrants.
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Affiliation(s)
- D Chowdhury
- Public Health Foundation of India, PIPPSE, Plot 47, Sector 44, Gurgaon, 122002, India.
| | - P S Saravanamurthy
- Public Health Foundation of India, PIPPSE, Plot 47, Sector 44, Gurgaon, 122002, India
| | - A Chakrabartty
- Health Vision and Research, 333A/1-Jessore Road, Kolkata, 700 089, India.
| | - S Purohit
- Public Health Foundation of India, PIPPSE, Plot 47, Sector 44, Gurgaon, 122002, India
| | - S S Iyer
- Tata Institute of Social Science (TISS), V.N.Purav Marg, Deonar, Mumbai, 400088, Maharashtra, India
| | - A Agarwal
- Public Health Foundation of India, PIPPSE, Plot 47, Sector 44, Gurgaon, 122002, India
| | - K M Gopal
- National Migration Unit (NMU), National AIDS Control Organisation, 36 Janpath Rd, Delhi 110001, India
| | - P Mishra
- Public Health Foundation of India, PIPPSE, Plot 47, Sector 44, Gurgaon, 122002, India
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Affiliation(s)
- Sristi Majumdar
- Material Nanochemistry Laboratory, Physical Sciences Division; Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk; Guwahati- 781035 India
| | - Tuhin Bhattacharjee
- Material Nanochemistry Laboratory, Physical Sciences Division; Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk; Guwahati- 781035 India
| | - Debajit Thakur
- Life Science Division; Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk; Guwahati- 781035 India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division; Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk; Guwahati- 781035 India
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Abstract
In this paper, we have tuned the dual properties, i.e., wettability and photoluminescence of GQDs by simply covalent modification with long chain alkyl (–C12H27) groups.
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Affiliation(s)
- Manash Jyoti Deka
- Material Nanochemistry Laboratory
- Physical Sciences Division
- Institute of Advanced Study in Science and Technology
- Paschim Boragaon
- Garchuk
| | - Ananya Dutta
- Material Nanochemistry Laboratory
- Physical Sciences Division
- Institute of Advanced Study in Science and Technology
- Paschim Boragaon
- Garchuk
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory
- Physical Sciences Division
- Institute of Advanced Study in Science and Technology
- Paschim Boragaon
- Garchuk
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Gehrie EA, Roubinian NH, Chowdhury D, Brambilla DJ, Murphy EL, Gottschall JL, Wu Y, Ness PM, Strauss RG, Hendrickson JE. A multicentre study investigating vital sign changes occurring in complicated and uncomplicated transfusions. Vox Sang 2017; 113:160-169. [PMID: 29277907 DOI: 10.1111/vox.12621] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 09/09/2017] [Accepted: 11/06/2017] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND OBJECTIVES Many hospitals require transfusions to be discontinued when vital signs stray from predetermined ranges, regardless of clinical symptoms. Variations in vital signs may be unrelated to transfusion, however, and needlessly stopping a transfusion may delay medical care while increasing donor exposures and healthcare costs. We hypothesized that a detailed study of vital sign changes associated with transfusion of blood product by component, including those associated with potential reactions (complicated) and those deemed to be uncomplicated, would establish a useful framework of reference for treating clinicians and transfusion services alike. MATERIALS AND METHODS A retrospective electronic record review of transfusion service and transfusion recipient data was completed on 3852 inpatient transfusion episodes over a 6-month period at four academic tertiary care hospitals across the United States. Vital signs pre- and post-transfusion were recorded by trained clinical research nurses. Serious reactions were adjudicated by a panel of transfusion medicine experts. RESULTS In both uncomplicated transfusions (n = 3765) and those including an adverse reaction (n = 87), vital sign fluctuations were generally modest. Compared to uncomplicated transfusions, transfusions complicated by febrile reactions were associated with higher pretransfusion temperature and higher pretransfusion pulse rates. Episodes of transfusion circulatory overload were associated with higher pretransfusion respiration rates compared to uncomplicated transfusions. CONCLUSION Most transfusions are associated with only modest changes in vital signs. Pretransfusion vital signs may be an important yet previously understudied predictor of vital sign changes during transfusion. The optimal role of vital sign assessment during blood transfusion deserves further study.
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Affiliation(s)
- E A Gehrie
- Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - N H Roubinian
- University of California, San Francisco, CA, USA.,Blood Systems Research Institute, San Francisco, CA, USA
| | | | | | - E L Murphy
- University of California, San Francisco, CA, USA.,Blood Systems Research Institute, San Francisco, CA, USA
| | - J L Gottschall
- Blood Center of Wisconsin, Milwaukee, WI, USA.,Department of Pathology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Y Wu
- Yale University, New Haven, CT, USA.,Bloodworks Northwest, Seattle, WA, USA
| | - P M Ness
- Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - R G Strauss
- Institute of Transfusion Medicine, Pittsburgh, PA, USA
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