Download or read book Fluorescence Resonance Energy Transfer FRET Based Sensors for Bioanalysis written by Gabriela Blagoi and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of my PhD study was to develop and characterize new methods and sensors based on fluorescence resonance energy transfer (FRET) for bioanalysis. Chapter 3 describes the use of FRET between donor fluorophores and acceptor labeled murine macrophage cells. FRET microscopy was used to determine whether the donor molecules truly permeate through the cell membrane or only adsorb to the cell surface. This method was found to be partially successful since the donor red tail fluorescence overlapped with the sensitized acceptor fluorescence and led to false reading of FRET. We found that is easier to monitor delivery of acceptor molecules into donor-labeled cells. Using donor labeled cells it was possible to determine whether the acceptor molecules were actually delivered into cells. However, a relatively high acceptor concentration in the hundreds of micromolar level was needed to obtain measurable FRET signals in the 3-D cellular system. The results underscored the need to reduce the dimensionality of FRET systems in order to increase the FRET efficiency between donor and acceptor molecules. Chapter 4 describes the development of FRET sensing lipobeads labeled with donors and their use to evaluate the interactions of acceptor molecules with the phospholipid membrane of FRET sensing lipobeads. The change in the dimensionality of the system in which FRET occurs, improved the sensitivity of our measurements by 3-folds compared to FRET measurements in solution. We concluded that a molecular recognition component had to be added to the sensing particles to further increase their selectivity and sensitivity. Chapter 5 describes the development of FRET trap sensing beads and their use for screening nonfluorescent carbohydrates and glycoproteins. The FRET sensing technique was based on binding between dextran molecules labeled with Texas Red (Dextran-TR) and polystyrene microparticles labeled with Fluorescein tagged Concanavalin A (FITC-ConA). It was found that carbohydrates and glycoproteins inhibit the binding between dextran-TR and FITC-ConA labeled particles. The inhibition effect was concentration dependent thus enabled screening carbohydrates and glycoproteins based on their inhibition potency. The dissertation critically evaluates the performance of FRET microscopy and FRET based sensors in delivery and screening applications.
Download or read book FRET F rster Resonance Energy Transfer written by Igor L. Medintz and published by John Wiley & Sons. This book was released on 2013-10-17 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt: FRET – Förster Resonance Energy Transfer Meeting the need for an up-to-date and detailed primer on all aspects of the topic, this ready reference reflects the incredible expansion in the application of FRET and its derivative techniques over the past decade, especially in the biological sciences. This wide diversity is equally mirrored in the range of expert contributors. The book itself is clearly subdivided into four major sections. The first provides some background, theory, and key concepts, while the second section focuses on some common FRET techniques and applications, such as in vitro sensing and diagnostics, the determination of protein, peptide and other biological structures, as well as cellular biosensing with genetically encoded fluorescent indicators. The third section looks at recent developments, beginning with the use of fluorescent proteins, followed by a review of FRET usage with semiconductor quantum dots, along with an overview of multistep FRET. The text concludes with a detailed and greatly updated series of supporting tables on FRET pairs and Förster distances, together with some outlook and perspectives on FRET. Written for both the FRET novice and for the seasoned user, this is a must-have resource for office and laboratory shelves.
Download or read book Fluorescence Sensors and Biosensors written by Richard B. Thompson and published by CRC Press. This book was released on 2005-12-16 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorescence-based sensing is a significant technique used in prominent fields such as fluorescence-activated cell sorting, DNA sequencing, high-throughput screening, and clinical diagnostics. Fluorescence Sensors and Biosensors emphasizes the most recent developments and emerging technologies with the broadest impacts. The text begins wi
Download or read book Long wavelength Fluorescence Resonance Energy Transfer FRET based Biosensor for Glucose Sensing Development and Interference Testing written by Mamdouh Salem Aloraefy and published by . This book was released on 2014 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapid, accurate, and non- or minimally-invasive sensors for glucose measurement have the potential to enhance diabetes control. Recent studies have indicated that implantable optical, affinity biosensors based on Förster Resonance Energy Transfer (FRET) can provide high sensitivity in quantifying glucose concentrations, in continuous and non-destructive fashion. However, there are gaps in the research related to best practices for characterizing the device and factors that alter its performance. First, a standard set of in vitro approaches for evaluating FRET glucose biosensor response has not been established. Second, the potential for chemical interference due to sugars and medications is not well established and standardized methods for quantifying such effects have not been developed. Third, information on the influence of tissue optics on signal detection in these devices is lacking. The general goals of this research project were two-fold: to elucidate the performance and working mechanism of FRET glucose biosensors and identify best practices for assessing performance. Towards these goals, a battery of performance test methods was developed, including spectral response, linearity, sensitivity, limit of detection, kinetic response, reversibility, stability, precision, and accuracy, including error grid analysis. A FRET glucose biosensor was then fabricated and the test methods implemented to fully characterize its response in vitro. Biochemical and optical interference were assessed through a bench-top fluorescence spectroscopy system and phantom measurements, respectively. The biosensor demonstrated a glucose response change of 45%, bias of less than 11%, and a limit of detection of 25 mg/dL. Mannose, maltose, fructose, lactose, and sucrose showed positive results for interference, with concentration estimates over-predicted by up to 64% due to 50 mg/dL concentrations of other sugars. The phantom measurements suggested that non-specific interactions between light and tissue-like samples tended to affect the overall detected signal, with minimal variations in spectral distribution. This was likely due to the choice of fluorophores with long-visible-wavelength emission peaks, where absorption due to hemoglobin is relatively small. The overall results provide evidence of the strengths and weaknesses of the performance of FRET glucose biosensor as well as insight into best practices for thorough objective, quantitative test methods for response evaluation of optical glucose biosensors and factors that influence performance.
Download or read book Using Conjugated Polymers as Biological Sensor Based on Fluorescence Resonance Energy Transfer written by Xuenlian Li and published by . This book was released on 2011 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: The specific objectives of the work presented in this dissertation are to design novel molecular sensors based on fluorescence resonance energy transfer (FRET) between fluorophore (donor) and polydiacetylene (PDA, acceptor) for selective detection of biomolecules in solution. The work described in this dissertation is divided into three sections. In the first section, the author reports two novel systems where the rate of energy transfer is based on changes in the spectral overlap between the emission of the donor and the absorption of the acceptor (J) as well as changes in the quantum yield of the acceptor. In the second section, the text discusses modified these high sensitive molecular sensors based on FRET by using different receptors for selective detection of biomolecules such as proteins or bacteria in solution. The third section develops reversibility studies on FRET based sensors in solution or solid state.
Download or read book Toward Multiplexed Nucleic Acid Assays and Biosensors Using Immobilized Quantum Dots as Donors in Fluorescence Resonance Energy Transfer FRET written by Walter Russell Algar and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantum Dot fluorescent Protein Pairs as Fluorescence Resonance Energy Transfer Pairs written by Allison Marie Dennis and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorescence resonance energy transfer (FRET)-based biosensors have been designed to fluorometrically detect everything from proteolytic activity to receptor-ligand interactions and structural changes in proteins. While a wide variety of fluorophores have demonstrated effectiveness in FRET probes, several potential sensor components are particularly notable. Semiconductor quantum dots (QDs) are attractive FRET donors because they are rather bright, exhibit high quantum yields, and their nanoparticulate structure enables the attachment of multiple acceptor molecules. Fluorescent proteins (FPs) are also of particular interest for fluorescent biosensors because design elements necessary for signal transduction, probe assembly, and device delivery and localization for intracellular applications can all be genetically incorporated into the FP polypeptide. : The studies described in this thesis elucidate the important parameters for concerted QD-FP FRET probe design. Experimental results clarify issues of FRET pair selection, probe assembly, and donor-acceptor distance for the multivalent systems. Various analysis approaches are compared and guidelines asserted based on the results. To demonstrate the effectiveness of the QD-FP FRET probe platform, a ratiometric pH sensor is presented. The sensor, which uses the intrinsic pH-sensitivity of the FP mOrange to modulate the FP/QD emission ratio, exhibits a 20-fold change in its ratiometric measurement over a physiologically interesting pH range, making it a prime candidate for intracellular imaging applications.
Download or read book Fluorescence Based Biosensors written by and published by Academic Press. This book was released on 2012-12-31 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the major challenges of modern biology and medicine consists in finding means to visualize biomolecules in their natural environment with the greatest level of accuracy, so as to gain insight into their properties and behaviour in a physiological and pathological setting. This has been achieved thanks to the design of novel imaging agents, in particular to fluorescent biosensors. Fluorescence Biosensors comprise a large set of tools which are useful for fundamental purposes as well as for applications in biomedicine, drug discovery and biotechnology. These tools have been designed and engineered thanks to the combined efforts of chemists and biologists over the last decade, and developed hand in hand together with imaging technologies. This volume will convey the many exciting developments the field of fluorescent biosensors and reporters has witnessed over the recent years, from concepts to applications, including chapters on the chemistry of fluorescent probes, on technologies for monitoring protein/protein interactions and technologies for imaging biosensors in cultured cells and in vivo. Other chapters are devoted to specific examples of genetically-encoded reporters, or to protein and peptide biosensors, together with examples illustrating their application to cellular and in vivo imaging, biomedical applications, drug discovery and high throughput screening. - Contributions from leading authorities - Informs and updates on all the latest developments in the field
Download or read book Fluorescence Microscopy written by Ulrich Kubitscheck and published by John Wiley & Sons. This book was released on 2017-03-27 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zu dem Thema gibt es viele Publikationen, die von Experten für Experten geschrieben wurden. Dieses Buch wendet sich insbesondere an Studenten höherer Semester und Forscher, denen das Hintergrundwissen der Physik fehlt, um neuartige Verfahren der Fluoreszenzmikroskopie zu verstehen. Die zweite Auflage wartet mit neuen Kapiteln und einer erweiterten Einführung auf. Der Schwerpunkt liegt auf der hochauflösenden und Einzelmolekül-Mikroskopie. Jedes Kapitel wurde von einem anerkannten Experten des Fachgebiets geschrieben und sorgfältig überarbeitet, um so die Entwicklungen der letzten Jahre wiederzugeben.
Download or read book Fluorescence Resonance Energy Transfer FRET Systems for Biomedical Sensor Applications written by Aoibhéann Bird and published by . This book was released on 2010 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantum Dots in Bioanalytical Chemistry and Medicine written by Michael Thompson and published by Royal Society of Chemistry. This book was released on 2023-08-25 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum dots are proven powerful probes for fluorescence imaging and have distinct properties that give them unique capabilities. Currently, they are being developed for a range of additional applications including the detection of disease, fluorescent assays for drug discovery, single protein tracking and intracellular reporting. Here, the various types of quantum dots are introduced, with the reader being provided with enough information in the text and the references to encourage a new quantum dot user to get started. Including an overview of the significant advancement in the field and discussing applications, the book emphasises how the properties of quantum dots are employed in bioanalytical chemistry. Closing with a prospectus of the future for quantum dots, any researchers and students in bioanalytical chemistry, medicine and clinical biochemistry will find this title useful supplementary reading.
Download or read book Carbon Nanomaterials for Bioimaging Bioanalysis and Therapy written by Yuen Y. Hui and published by John Wiley & Sons. This book was released on 2019-01-29 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive reference on biochemistry, bioimaging, bioanalysis, and therapeutic applications of carbon nanomaterials Carbon nanomaterials have been widely applied for biomedical applications in the past few decades, because of their unique physical properties, versatile functionalization chemistry, and biological compatibility. This book provides background knowledge at the entry level into the biomedical applications of carbon nanomaterials, focusing on three applications: bioimaging, bioanalysis, and therapy. Carbon Nanomaterials for Bioimaging, Bioanalysis and Therapy begins with a general introduction to carbon nanomaterials for biomedical applications, including a discussion about the pros and cons of various carbon nanomaterials for the respective therapeutic applications. It then goes on to cover fluorescence imaging; deep tissue imaging; photoacoustic imaging; pre-clinical/clinical bioimaging applications; carbon nanomaterial sensors for cancer and disease diagnosis; targeted cancer therapy; and photothermal/photodynamic therapy. Each chapter briefly introduces the biomedical application and emphasizes the most appropriate carbon nanomaterial(s) for the application. Provides an introduction to the biomedical applications of carbon nanomaterials for early-career scientists, as well as background and context for mid-career scientists and researchers Contains four sections covering biochemistry, bioimaging, bioanalysis, and therapeutic applications of carbon nanomaterials Presented by experts who have strong background in the field of nanotechnology for biomedical applications Covers a hot area of research which has very unique physical properties, versatile functionalization chemistry, and biological compatibility Carbon Nanomaterials for Bioimaging, Bioanalysis and Therapy is an excellent resource for academic researchers and industrial scientists working on preparation and bio-application of carbon nanomaterials, biomedical engineering, and nanotechnology.
Download or read book Development of a Fluorescence Resonance Energy Transfer Optical Nanoscale Biosensor Based on a Liquid core Waveguide Platform written by R. Cody Stringer and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to produce a more versatile, adaptable, and effective method for detection of biological analytes, a self-contained and robust fluorescent optical biosensor architecture utilizing fluorescence resonance energy transfer (FRET) is proposed. This biosensor architecture is then applied to a highly adept liquid-core waveguide platform. FRET is a distance-dependent signal transduction method that occurs between two fluorescent molecules, termed the donor and acceptor. When the donor and acceptor are brought within close proximity, a quantifiable nonradiative energy exchange takes place. In order to launch FRET, a donor-labeled Protein A molecule is bound to an acceptor-labeled capture antibody. When exposed to antigen, the antibody-antigen binding event initiates a conformational change within the structure of the antibody, and thereby induces a measurable change in energy transfer from the donor to the acceptor by altering the distance between the FRET pair. Additionally, effects of quantum dots and gold nanoparticles utilized within the FRET system are studied. The resulting system is then optimized and tested in a liquid-core waveguide platform that is able to retrieve sensitive and accurate measurements. In the current study, the biosensor was used to detect Porcine Reproductive and Respiratory Syndrome virus and human cardiac Troponin I, showing ample sensitivity and a high degree of specificity, as well as rapid response.
Download or read book Nanosensing and Bioanalytical Technologies in Food Quality Control written by Pranjal Chandra and published by Springer Nature. This book was released on 2022-03-25 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews applications of nanomaterial and nanodevices in the food industry. It also discusses the advanced bioanalytical techniques, including Enzyme-Linked Immunosorbent Assay (ELISA), immunoanalytical techniques, monoclonal antibody-based immunological techniques for detecting food adulterations and allergens. It comprehensively covers electrode modification and nano-engineered fabrication of biosensors to enhance their functionalities for utilization in food industries. The book highlights the utilization of nanobiosensors for food safety and quality analysis, such as detection of toxin, food-borne pathogen, allergen, and evaluation of toxicity. Further, it also summarizes the recent advances in nanodevices such as nano-systems, nano-emulsions, nanopesticide, nanocapsule and their applications in the food industry. Lastly, it covers nanomaterial-based sensors for drug analysis in diverse matrices. It serves as an invaluable source of information for professionals, researchers, academicians, and students related to food science and technology.
Download or read book Advanced Materials and Techniques for Biosensors and Bioanalytical Applications written by Pranab Goswami and published by CRC Press. This book was released on 2020-11-01 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioanalytical science and its technological subdomain, biosensors, are ever-evolving subjects, striving for rapid improvement in terms of performance and expanding the target range to meet the vast societal and market demands. The key performance factors for a biosensor that drive the research are selectivity, sensitivity, response time, accuracy, and reproducibility, with additional requirements of its portability and inexpensive nature. These performance factors are largely governed by the materials and techniques being used in these bioanalytical platforms. The selection of materials to meet these requirements is critical, as their interaction or involvement with the biological recognition elements should initiate or improve these performance factors. The technique discussed primarily applies to transducers involved in converting a biochemical signal to optical or electrical signals. Over the years, the emergence of novel materials and techniques has drastically improved the performance of these bioanalytical systems, enabling them to expand their analytical horizon. These advanced materials and techniques are central to modern bioanalytical and biosensor research. Advanced Materials and Techniques for Biosensors and Bioanalytical Applications provides a comprehensive review of the subject, including a knowledge platform for both academics and researchers. Considering biosensors as a central theme to this book, an outline on this subject with background principles has been included, with a scope of extending the utility of the book to coursework in graduate and postgraduate schools. Features: • Basic principles on different classes of biosensors, recent advances and applications • Smart materials for biosensors and other rapid, portable detection devices • Metal nanoparticles and nanocrystals for analytical applications • Carbon-based nanoparticles and quantum dots for sensing applications • Nanozymes as potential catalysts for sensing applications • Bioelectrochemiluminescence and photoelectrochemical-based biosensors • Paper electronics and paper-based biosensors • Microbial biosensors: artificial intelligence, genetic engineering, and synthetic biology • Biofuel cells as a signal transduction platform • FET-based biosensors, including ISFET and BioFET This book serves as a reference for scientific investigators and a textbook for a graduate-level course in biosensors and advanced bioanalytical techniques.
Download or read book Towards a Fluorescence Resonance Energy Transfer FRET Strategy for Development of a Biosensor for Detection of Nucleic Acid Hybridization on Fused Silica Surfaces microform written by Melissa Massey and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2005 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thiazole orange (TO) with different tethers were synthesized to be attached to oligonucleotides. The FRET of TO in solution with double-stranded DNA (dsDNA) was investigated with BlackHole (BHQ1) or ((4-dimethylamino)phenyl)azo)benzoic acid (DABCYL) quenchers which decreased the fluorescence 2.9 +/- 7% and 2.5 +/- 10% times, respectively. A quenching mechanism could therefore be designed to transduce hybridization. The FRET of N, N, N, N-tetramethylcarboxyrhodamine (TAMRA) and IowaBlackRQ RTM (IABLK) linked to complementary oligonucleotides immobilized on glass substrates was investigated; IABLK quenched TAMRA fluorescence. However, surface bound dsDNA caused some self-quenching of TAMRA. Solution FRET using TAMRA/IABLK at 24.5°C and 60°C with complementary and mismatched DNA was measured to investigate potential for mismatch detection. The probe sequence was based on the determinate for Spinal Muscular Atrophy (SMA). Signal intensity differed between complementary and the mismatch samples at 60°C, indicating mismatch detection potential. Results suggest the possibility of designing tethered fluorophore-quencher pairs for transduction of hybridization for development of optical nucleic acid biosensors for SMA screening.
Download or read book Fluorescence Resonance Energy Transfer Based MCM EDTA Tb3 MES Sensor written by and published by . This book was released on 2008 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
