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Mohammad A, Srivastava M, Ahmad I, Singh R, Deen PR, Rai A, Lal B, Srivastava N, Gupta VK. Prospects of graphene quantum dots preparation using lignocellulosic wastes for application in photofermentative hydrogen production. CHEMOSPHERE 2024:142804. [PMID: 39029708 DOI: 10.1016/j.chemosphere.2024.142804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 06/06/2024] [Accepted: 07/06/2024] [Indexed: 07/21/2024]
Abstract
Graphene quantum dots (GQDs) are a novel carbon nanomaterial from the graphene family due to their unique physicochemical properties and diverse range of applications. However, in terms of the sustainable utility of GQDs, their synthesis methods are the main roadblock because of their high production costs and the release of toxic byproducts during the production processes. Thus, the search for sustainable and economical fabrication methods for preparing GQDs is one of the most essential areas of research for their practical applications. In this context, lignocellulosic biomass (LCB) wastes are a prime choice for the fabrication of GQDs due to their high carbon and cellulose content, which are favorable for being employed as precursors and reducing agents Additionally, LCBs are a prime source of potential bioenergy production, which is currently a key research hotspot to combat environmental pollution, global warming, and energy crises. Therefore, the present review provides feasibility for sustainable and environmentally friendly fabrication of GQDs using LCB wastes for their possible utility in cellulosic biofuel production technology improvement. Furthermore, the prospective of using these GQDs as catalysts in bioenergy production for the development of low-cost biomass-based biofuel production technology has been discussed along with the existing limitations and their sustainable recommendation.
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Affiliation(s)
- Akbar Mohammad
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Manish Srivastava
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Irfan Ahmad
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Rajeev Singh
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Prakash Ranjan Deen
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Ashutosh Rai
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Basant Lal
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Neha Srivastava
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Vijai Kumar Gupta
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom.
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Charlton BK, Downie DH, Noman I, Alves PU, Eling CJ, Laurand N. Surface Functionalisation of Self-Assembled Quantum Dot Microlasers with a DNA Aptamer. Int J Mol Sci 2023; 24:14416. [PMID: 37833863 PMCID: PMC10572750 DOI: 10.3390/ijms241914416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 09/18/2023] [Accepted: 09/20/2023] [Indexed: 10/15/2023] Open
Abstract
The surface functionalisation of self-assembled colloidal quantum dot supraparticle lasers with a thrombin binding aptamer (TBA-15) has been demonstrated. The self-assembly of CdSSe/ZnS alloyed core/shell microsphere-shape CQD supraparticles emitting at 630 nm was carried out using an oil-in-water emulsion technique, yielding microspheres with an oleic acid surface and an average diameter of 7.3 ± 5.3 µm. Surface modification of the microspheres was achieved through a ligand exchange with mercaptopropionic acid and the subsequent attachment of TBA-15 using EDC/NHS coupling, confirmed by zeta potential and Fourier transform IR spectroscopy. Lasing functionality between 627 nm and 635 nm was retained post-functionalisation, with oleic acid- and TBA-coated microspheres exhibiting laser oscillation with thresholds as low as 4.10 ± 0.37 mJ·cm-2 and 7.23 ± 0.78 mJ·cm-2, respectively.
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Affiliation(s)
| | | | | | | | | | - Nicolas Laurand
- Technology & Innovation Centre, Institute of Photonics, University of Strathclyde, 99 George Street, Glasgow G1 1RD, UK; (B.K.C.); (D.H.D.); (I.N.); (P.U.A.); (C.J.E.)
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Elistratova JG, Akhmadeev BS, Islamova LN, Fazleeva GM, Kalinin AA, Orekhov AS, Petrov KA, Sinyashin OG, Mustafina AR. Mixed bilayers of phosphatidylcholine with dialkylaminostyrylhetarene dyes for AChE-assisted fluorescent sensing of paraoxon. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4
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Monitoring protein conformational changes using fluorescent nanoantennas. Nat Methods 2022; 19:71-80. [PMID: 34969985 DOI: 10.1038/s41592-021-01355-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 11/10/2021] [Indexed: 01/03/2023]
Abstract
Understanding the relationship between protein structural dynamics and function is crucial for both basic research and biotechnology. However, methods for studying the fast dynamics of structural changes are limited. Here, we introduce fluorescent nanoantennas as a spectroscopic technique to sense and report protein conformational changes through noncovalent dye-protein interactions. Using experiments and molecular simulations, we detect and characterize five distinct conformational states of intestinal alkaline phosphatase, including the transient enzyme-substrate complex. We also explored the universality of the nanoantenna strategy with another model protein, Protein G and its interaction with antibodies, and demonstrated a rapid screening strategy to identify efficient nanoantennas. These versatile nanoantennas can be used with diverse dyes to monitor small and large conformational changes, suggesting that they could be used to characterize diverse protein movements or in high-throughput screening applications.
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A new substrate for glutathione reductase: Glutathione coated Ag2S quantum dots. Talanta 2019; 194:501-506. [DOI: 10.1016/j.talanta.2018.10.049] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Revised: 10/10/2018] [Accepted: 10/15/2018] [Indexed: 01/22/2023]
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Vranish JN, Ancona MG, Walper SA, Medintz IL. Pursuing the Promise of Enzymatic Enhancement with Nanoparticle Assemblies. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:2901-2925. [PMID: 29115133 DOI: 10.1021/acs.langmuir.7b02588] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The growing emphasis on green chemistry, renewable resources, synthetic biology, regio-/stereospecific chemical transformations, and nanotechnology for providing new biological products and therapeutics is reinvigorating research into enzymatic catalysis. Although the promise is profound, many complex issues remain to be addressed before this effort will have a significant impact. Prime among these is to combat the degradation of enzymes frequently seen in ex vivo formats following immobilization to stabilize the enzymes for long-term application and to find ways of enhancing their activity. One promising avenue for progress on these issues is via nanoparticle (NP) display, which has been found in a number of cases to enhance enzyme activity while also improving long-term stability. In this feature article, we discuss the phenomenon of enhanced enzymatic activity at NP interfaces with an emphasis on our own work in this area. Important factors such as NP surface chemistry, bioconjugation approaches, and assay formats are first discussed because they can critically affect the observed enhancement. Examples are given of improved performance for enzymes such as phosphotriesterase, alkaline phosphatase, trypsin, horseradish peroxidase, and β-galactosidase and in configurations with either the enzyme or the substrate attached to the NP. The putative mechanisms that give rise to the performance boost are discussed along with how detailed kinetic modeling can contribute to their understanding. Given the importance of biosensing, we also highlight how this configuration is already making a significant contribution to NP-based enzymatic sensors. Finally, a perspective is provided on how this field may develop and how NP-based enzymatic enhancement can be extended to coupled systems and multienzyme cascades.
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Jain A, Cheng K. The principles and applications of avidin-based nanoparticles in drug delivery and diagnosis. J Control Release 2017; 245:27-40. [PMID: 27865853 PMCID: PMC5222781 DOI: 10.1016/j.jconrel.2016.11.016] [Citation(s) in RCA: 143] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 11/07/2016] [Indexed: 01/04/2023]
Abstract
Avidin-biotin interaction is one of the strongest non-covalent interactions in the nature. Avidin and its analogues have therefore been extensively utilized as probes and affinity matrices for a wide variety of applications in biochemical assays, diagnosis, affinity purification, and drug delivery. Recently, there has been a growing interest in exploring this non-covalent interaction in nanoscale drug delivery systems for pharmaceutical agents, including small molecules, proteins, vaccines, monoclonal antibodies, and nucleic acids. Particularly, the ease of fabrication without losing the chemical and biological properties of the coupled moieties makes the avidin-biotin system a versatile platform for nanotechnology. In addition, avidin-based nanoparticles have been investigated as diagnostic systems for various tumors and surface antigens. In this review, we will highlight the various fabrication principles and biomedical applications of avidin-based nanoparticles in drug delivery and diagnosis. The structures and biochemical properties of avidin, biotin and their respective analogues will also be discussed.
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Affiliation(s)
- Akshay Jain
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Missouri Kansas City, Kansas City, MO 64108, United States
| | - Kun Cheng
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Missouri Kansas City, Kansas City, MO 64108, United States.
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A simple approach to a vastly improved acetylcholinesterase activity and stability at elevated temperatures using magnetic microbeads and poly(N-(3-aminopropyl methacrylamide)) hydrogel supports. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2016.09.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Breger JC, Ancona MG, Walper SA, Oh E, Susumu K, Stewart MH, Deschamps JR, Medintz IL. Understanding How Nanoparticle Attachment Enhances Phosphotriesterase Kinetic Efficiency. ACS NANO 2015; 9:8491-503. [PMID: 26230391 DOI: 10.1021/acsnano.5b03459] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
As a specific example of the enhancement of enzymatic activity that can be induced by nanoparticles, we investigate the hydrolysis of the organophosphate paraoxon by phosphotriesterase (PTE) when the latter is displayed on semiconductor quantum dots (QDs). PTE conjugation to QDs underwent extensive characterization including structural simulations, electrophoretic mobility shift assays, and dynamic light scattering to confirm orientational and ratiometric control over enzyme display which appears to be necessary for enhancement. PTE hydrolytic activity was then examined when attached to ca. 4 and 9 nm diameter QDs in comparison to controls of freely diffusing enzyme alone. The results confirm that the activity of the QD conjugates significantly exceeded that of freely diffusing PTE in both initial rate (∼4-fold) and enzymatic efficiency (∼2-fold). To probe kinetic acceleration, various modified assays including those with increased temperature, presence of a competitive inhibitor, and increased viscosity were undertaken to measure the activation energy and dissociation rates. Cumulatively, the data indicate that the higher activity is due to an acceleration in enzyme-product dissociation that is presumably driven by the markedly different microenvironment of the PTE-QD bioconjugate's hydration layer. This report highlights how a specific change in an enzymatic mechanism can be both identified and directly linked to its enhanced activity when displayed on a nanoparticle. Moreover, the generality of the mechanism suggests that it could well be responsible for other examples of nanoparticle-enhanced catalysis.
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Affiliation(s)
- Joyce C Breger
- American Society for Engineering Education , Washington, DC 20036, United States
| | | | | | - Eunkeu Oh
- Sotera Defense Solutions, Inc. 7230 Lee DeForest Drive, Columbia, Maryland 21046, United States
| | - Kimihiro Susumu
- Sotera Defense Solutions, Inc. 7230 Lee DeForest Drive, Columbia, Maryland 21046, United States
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Breger JC, Walper SA, Oh E, Susumu K, Stewart MH, Deschamps JR, Medintz IL. Quantum dot display enhances activity of a phosphotriesterase trimer. Chem Commun (Camb) 2015; 51:6403-6. [DOI: 10.1039/c5cc00418g] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Phosphotrisomerase trimer assembled on a quantum dot. This construct displays enhanced catalytic over freely diffusing enzyme and has potential to be spun into a fiber.
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Affiliation(s)
- Joyce C. Breger
- Center for Bio/Molecular Science and Engineering
- Code 6900
- U. S. Naval Research Laboratory
- Washington
- USA
| | - Scott A. Walper
- Center for Bio/Molecular Science and Engineering
- Code 6900
- U. S. Naval Research Laboratory
- Washington
- USA
| | - Eunkeu Oh
- Optical Sciences Division
- Code 5600. U.S. Naval Research Laboratory
- Washington
- USA
- Sotera Defense Solutions
| | - Kimihiro Susumu
- Optical Sciences Division
- Code 5600. U.S. Naval Research Laboratory
- Washington
- USA
- Sotera Defense Solutions
| | - Michael H. Stewart
- Optical Sciences Division
- Code 5600. U.S. Naval Research Laboratory
- Washington
- USA
| | - Jeffrey R. Deschamps
- Center for Bio/Molecular Science and Engineering
- Code 6900
- U. S. Naval Research Laboratory
- Washington
- USA
| | - Igor L. Medintz
- Center for Bio/Molecular Science and Engineering
- Code 6900
- U. S. Naval Research Laboratory
- Washington
- USA
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