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Vu DT, Le TTV, Hsu CC, Lai ND, Hecquet C, Benisty H. Positive role of the long luminescence lifetime of upconversion nanophosphors on resonant surfaces for ultra-compact filter-free bio-assays. BIOMEDICAL OPTICS EXPRESS 2021; 12:1-19. [PMID: 33659069 PMCID: PMC7899508 DOI: 10.1364/boe.405759] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 11/17/2020] [Indexed: 06/12/2023]
Abstract
We introduce a compact array fluorescence sensor principle that takes advantage of the long luminescence lifetimes of upconversion nanoparticles (UCNPs) to deploy a filter-free, optics-less contact geometry, advantageous for modern biochemical assays of biomolecules, pollutants or cells. Based on technologically mature CMOS chips for ∼10 kHz technical/scientific imaging, we propose a contact geometry between assayed molecules or cells and a CMOS chip that makes use of only a faceplate or direct contact, employing time-window management to reject the 975 nm excitation light of highly efficient UCNPs. The chip surface is intended to implement, in future devices, a resonant waveguide grating (RWG) to enhance excitation efficiency, aiming at the improvement of upconversion luminescence emission intensity of UCNP deposited atop of such an RWG structure. Based on mock-up experiments that assess the actual chip rejection performance, we bracket the photometric figures of merit of such a promising chip principle and predict a limit of detection around 10-100 nanoparticles.
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Affiliation(s)
- Duc Tu Vu
- Laboratoire Charles Fabry, CNRS, Institut d’Optique Graduate School, Université Paris-Saclay, Palaiseau, 91127, France
- Faculty of Electrical and Electronics Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi, 10000, Vietnam
- Laboratoire Lumière, Matière et Interfaces (LuMIn), FRE 2036, École Normale Supérieure Paris-Saclay, 4 Avenue des Sciences, Gif-sur-Yvette, 91190, France
| | - Thanh-Thu Vu Le
- Department of Physics and Center for Nano Bio-Detection, National Chung Cheng University, Ming Hsiung, Chia Yi, 621, Taiwan
| | - Chia-Chen Hsu
- Department of Physics and Center for Nano Bio-Detection, National Chung Cheng University, Ming Hsiung, Chia Yi, 621, Taiwan
| | - Ngoc Diep Lai
- Laboratoire Lumière, Matière et Interfaces (LuMIn), FRE 2036, École Normale Supérieure Paris-Saclay, 4 Avenue des Sciences, Gif-sur-Yvette, 91190, France
| | - Christophe Hecquet
- Laboratoire Charles Fabry, CNRS, Institut d’Optique Graduate School, Université Paris-Saclay, Palaiseau, 91127, France
| | - Henri Benisty
- Laboratoire Charles Fabry, CNRS, Institut d’Optique Graduate School, Université Paris-Saclay, Palaiseau, 91127, France
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Omar MA, Abdel Hamid MA, Batakoushy HA, Ahmed HM. Second-derivative synchronous spectrofluorimetric assay of dapagliflozin: Application to stability study and pharmaceutical preparation. LUMINESCENCE 2019; 35:260-265. [PMID: 31733037 DOI: 10.1002/bio.3722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Revised: 08/01/2019] [Accepted: 08/28/2019] [Indexed: 12/17/2022]
Abstract
A highly accurate, simple and sensitive spectrofluorimetric analytical method for dapagliflozin (DGF) quantitation was developed. The proposed method was successively applied to DGF analysis in both its pure and pharmaceutical dosage forms. This method was developed to investigate DGF stability in its degradation products, as laid out in International Council for Harmonisation (ICH) rules. Kinetics of alkaline degradation of DGF was also calculated. The half-life time (t1/2 ) of the reaction was 75.32 min. An alkaline degradation pathway was described. The present study involved measurement of the second-derivative synchronous fluorescence intensity of DGF at Δλ = 30 nm. Peak amplitude was measured at 322 nm. Linear range of the calibration curve was 0.1-1.0 μg ml-1 . Lower detection and quantitation limits were 0.023 and 0.071 μg ml-1 , respectively, and indicated good sensitivity of the proposed method. Mean per cent recovery was 99.78 ± 1.78%. The proposed analytical approach was successfully applied to DGF in the quality control laboratory and would be suitable as a stability-indicating assay.
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Affiliation(s)
- Mahmoud A Omar
- Department of Pharmacognosy and Pharmaceutical Chemistry, College of Pharmacy, Taibah University, Medinah, Saudi Arabia.,Department of Analytical Chemistry, Faculty of Pharmacy, Minia University, Egypt
| | - Mohamed A Abdel Hamid
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Tanta University, Egypt
| | - Hany A Batakoushy
- Pharmaceutical Analysis Department, Faculty of Pharmacy, Menoufia University, Egypt
| | - Hytham M Ahmed
- Pharmaceutical Analysis Department, Faculty of Pharmacy, Menoufia University, Egypt
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Narayanamurthy V, Padmapriya P, Noorasafrin A, Pooja B, Hema K, Firus Khan AY, Nithyakalyani K, Samsuri F. Skin cancer detection using non-invasive techniques. RSC Adv 2018; 8:28095-28130. [PMID: 35542700 PMCID: PMC9084287 DOI: 10.1039/c8ra04164d] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 07/22/2018] [Indexed: 12/22/2022] Open
Abstract
Skin cancer is the most common form of cancer and is globally rising. Historically, the diagnosis of skin cancers has depended on various conventional techniques which are of an invasive manner. A variety of commercial diagnostic tools and auxiliary techniques are available to detect skin cancer. This article explains in detail the principles and approaches involved for non-invasive skin cancer diagnostic methods such as photography, dermoscopy, sonography, confocal microscopy, Raman spectroscopy, fluorescence spectroscopy, terahertz spectroscopy, optical coherence tomography, the multispectral imaging technique, thermography, electrical bio-impedance, tape stripping and computer-aided analysis. The characteristics of an ideal screening test are outlined, and the authors pose several points for clinicians and scientists to consider in the evaluation of current and future studies of skin cancer detection and diagnosis. This comprehensive review critically analyses the literature associated with the field and summarises the recent updates along with their merits and demerits.
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Affiliation(s)
- Vigneswaran Narayanamurthy
- InnoFuTech No: 42/12, 7th Street, Vallalar Nagar, Pattabiram Chennai Tamil Nadu 600072 India
- Faculty of Electrical and Electronics Engineering, University Malaysia Pahang Pekan 26600 Malaysia
| | - P Padmapriya
- Department of Biomedical Engineering, Veltech Multitech Dr. RR & Dr. SR Engineering College Chennai 600 062 India
| | - A Noorasafrin
- Department of Biomedical Engineering, Veltech Multitech Dr. RR & Dr. SR Engineering College Chennai 600 062 India
| | - B Pooja
- Department of Biomedical Engineering, Veltech Multitech Dr. RR & Dr. SR Engineering College Chennai 600 062 India
| | - K Hema
- Department of Biomedical Engineering, Veltech Multitech Dr. RR & Dr. SR Engineering College Chennai 600 062 India
| | - Al'aina Yuhainis Firus Khan
- Department of Biomedical Science, Faculty of Allied Health Sciences, International Islamic University Malaysia 25200 Kuantan Pahang Malaysia
| | - K Nithyakalyani
- Department of Biomedical Engineering, Veltech Multitech Dr. RR & Dr. SR Engineering College Chennai 600 062 India
| | - Fahmi Samsuri
- Faculty of Electrical and Electronics Engineering, University Malaysia Pahang Pekan 26600 Malaysia
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Mabrouk MM, Hammad SF, El-Malla SF, Elshenawy EA. Simultaneous determination of amlodipine and metoprolol in their combined dosage form using a synchronous fluorescence spectrofluorimetric method. LUMINESCENCE 2017; 33:364-369. [DOI: 10.1002/bio.3422] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Revised: 09/21/2017] [Accepted: 09/23/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Mokhtar M. Mabrouk
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy; Tanta University; Tanta Egypt
| | - Sherin F. Hammad
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy; Tanta University; Tanta Egypt
| | - Samah F. El-Malla
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy; Tanta University; Tanta Egypt
| | - Eman A. Elshenawy
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy; Tanta University; Tanta Egypt
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Tomečková V, Komanický V, Kakoush M, Krajčíková K, Glinská G, Široká M, Pundová L, Samuely T, Hložná D, Lotnyk D. Monitoring of Heart Ischemia in Blood Serum. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/sar.2016.42002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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