Готові списки джерел за темами / UV light detection

Добірка наукової літератури з теми "UV light detection"

Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "UV light detection"

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Karaduman, Irmak, Dilber E. Yıldız, Mehmet M. Sincar, and Selim Acar. "UV light activated gas sensor for NO2 detection." Materials Science in Semiconductor Processing 28 (December 2014): 43–47. http://dx.doi.org/10.1016/j.mssp.2014.04.011.

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2

Yamamoto, Seiichi, and Jun Kataoka. "Detection of luminescence from Vitamin B2 plate during alpha particle irradiation." Journal of Instrumentation 17, no. 11 (November 1, 2022): T11005. http://dx.doi.org/10.1088/1748-0221/17/11/t11005.

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Abstract Vitamin B2 (V-B2) is a material that converts shorter-wavelength light such as ultraviolet (UV) light to longer-wavelength light. However, it is not clear whether longer-wavelength light is produced by the irradiation of alpha particles. Because UV light such as Cherenkov light is required to produce longer-wavelength light for V-B2 and alpha particles do not produce Cherenkov light in a material, no light is expected to be emitted in V-B2 by the irradiation of alpha particles. However, we irradiated alpha particles to a V-B2 plate and measured the produced light in the plate. During irradiation of alpha particles, a significant amount of longer-wavelength light was observed from the V-B2 plate. The luminescence intensity of the V-B2 plate during irradiation of alpha particles was ∼1/6 of that of the plastic scintillator. The spectrum of luminescence from the V-B2 plate during this irradiation was the same as that emitted by the irradiation of ultraviolet (UV) light, which possibly indicates UV or shorter-wavelength light production in the V-B2 plate by the irradiation of alpha particles. This longer-wavelength light is not attributed to the UV light from the air scintillation by the alpha particles but to the direct irradiation of alpha particles to the V-B2 plate. From these results, we conclude that the luminescence of the V-B2 plate was the scintillation by the irradiation of alpha particles, or other phenomenon that was; UV as well as shorter-wavelength visible light was produced in the V-B2 plate by the irradiation of alpha particles and that the longer-wavelength light was produced from this light. The UV light was produced from the light generated by the dipole interaction of moving secondary electrons with V-B2 or binder molecules and then converted to the longer-wavelength light with a slower decay of the V-B2 in the plate that had high intensity due to the decreased simultaneity of the light emission.
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3

NERGUIZIAN, Vahé, Mustapha RAFAF, Muthukumaran PACKIRISAMY, and Ion STIHARU. "ULTRA VIOLET DETECTION SENSORS." International Journal of High Speed Electronics and Systems 16, no. 02 (June 2006): 583–88. http://dx.doi.org/10.1142/s0129156406003862.

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This article presents an innovative and creative approach to detect harmful level of Ultra Violet light on human skin. Different commercial UV sensors are evaluated for comparison. The comparison is made for performance, cost and dimension. The proposed affordable UV sensor solutions are presented using chemical and MEMS/MOEMS technologies. The UV dynamic sensor detects the harmful level of UV and informs the user about the eventual UV radiation risk. The proposed two solutions consider chemical material for UV detection and different actuation mechanism to inform the UV harmful level to the user. These sensors are non disposable and are packaged for visual monitoring (without battery) and acoustic operation (using a battery).
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4

Kume, Naoto, Akio Sumita, Naoya Sakamoto, Takeshi Hoshi, Koki Okazaki, Haruo Miyadera, Yasufumi Miyahara, and Yuki Nakai. "Alpha emitter detection systems using a UV light detector." Applied Optics 61, no. 6 (February 15, 2022): 1414. http://dx.doi.org/10.1364/ao.446006.

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5

Yaakobovitz, Barak, Yoel Cohen, and Yoed Tsur. "Line edge roughness detection using deep UV light scatterometry." Microelectronic Engineering 84, no. 4 (April 2007): 619–25. http://dx.doi.org/10.1016/j.mee.2006.12.002.

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6

Lai, Connie, Peter J. Bush, Stephen Warunek, David A. Covell, and Thikriat Al-Jewair. "An in vitro comparison of ultraviolet versus white light in the detection of adhesive remnants during orthodontic debonding." Angle Orthodontist 89, no. 3 (January 17, 2019): 438–45. http://dx.doi.org/10.2319/072018-526.1.

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ABSTRACT Objectives: To assess the effectiveness and efficiency of ultraviolet (UV) illumination compared to conventional white light in the detection of fluorescent-tagged adhesive remnants during orthodontic debonding. Materials and Methods: Orthodontic brackets were bonded to extracted human premolars using one of two bonding resins having fluorescent properties (Pad Lock, Reliance Orthodontics, Itasca, Ill; Opal Bond MV, Opal Orthodontics, South Jordan, Utah; n = 40 each). The brackets were then debonded and, in each adhesive group, half the teeth had the remaining adhesive resin removed under illumination using the operatory light and the other half using a UV (395 nm) light emitting diode (LED) flashlight (n = 20/group). Time for teeth cleanup was recorded. Follow-up images were obtained under a dissecting microscope using UV illumination, and the surface area of adhesive remnants was calculated. Effectiveness of adhesive removal was also assessed using scanning electron microscopy imaging. Analysis of variance and Kruskal-Wallis tests were used to analyze time and adhesive remnants, respectively. Results: Assessment using the dissecting microscope found groups using UV light during adhesive removal had statistically significantly lower amounts of adhesive remnants than groups using white light (P ≤ .01). Time for adhesive removal was significantly lower with Opal Bond MV adhesive using UV light when compared with the white light (P ≤ .01). Assessment by scanning electron microscopy showed that thin remnants of adhesive (<2 μm) remained undetected by UV illumination. Conclusions: UV light is more effective and tends to be more efficient than white light in the detection of fluorescent adhesive during orthodontic debonding. Although there are limitations, the use of UV LED lighting is a practical tool that aids in adhesive detection.
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Boscarino, Filice, Sciuto, Libertino, Scuderi, Galati, and Scalese. "Investigation of ZnO-decorated CNTs for UV Light Detection Applications." Nanomaterials 9, no. 8 (July 31, 2019): 1099. http://dx.doi.org/10.3390/nano9081099.

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Multi-walled carbon nanotubes (CNTs) decorated with zinc oxide nanoparticles (ZnO NPs) were prepared in isopropanol solution by a simple, room-temperature process and characterized from structural, morphological, electronic, and optical points of view. A strong interaction between ZnO and CNTs is fully confirmed by all the characterization techniques. ZnO-CNTs nanocomposites, with different weight ratios, were deposited as a dense layer between two electrodes, in order to investigate the electrical behaviour. In particular, the electrical response of the nanocomposite layers to UV light irradiation was recorded for a fixed voltage: As the device is exposed to the UV lamp, a sharp current drop takes place and then an increase is observed as the irradiation is stopped. The effect can be explained by adsorption and desorption phenomena taking place on the ZnO nanoparticle surface under irradiation and by charge transfer between ZnO and CNTs, thanks to the strong interaction between the two nanomaterials. The nanocomposite material shows good sensitivity and fast response to UV irradiation. Room temperature and low-cost processes used for the device preparation combined with room temperature and low voltage operational conditions make this methodology very promising for large scale UV detectors applications.
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Arachchige, Hashitha M. M. Munasinghe, Nanda Gunawardhana, Dario Zappa, and Elisabetta Comini. "UV Light Assisted NO2Sensing by SnO2/Graphene Oxide Composite." Proceedings 2, no. 13 (November 23, 2018): 787. http://dx.doi.org/10.3390/proceedings2130787.

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Nitric oxide (NO2) is one of the air pollutants that pose serious environmental concerns over the years. In this study, SnO2 nanowires were synthesized by evaporation-condensation method and graphene oxide were synthesized using modified Hummers method for low temperature NO2 detection. Drop cast method was used to transfer graphene oxide (GO), to form composite GO-metal oxide p-n junctions. With integration of reduce graphene oxide (rGO), the UV light absorption was enhanced. This metal oxide composite has shown a reversible response in detecting low concentrations of NO2 under UV irradiation, with a working temperature range of 50–150 °C. Pure SnO2 shows 20% response to NO2 (4 ppm) in dark conditions, while the response increasesupto60%usingUVirradiationat50°C.Furthermore, SnO2/rGOshowsa40%ofresponse in dark, while the response increases to 160% under UV light illumination. This composite exhibits excellent recovery and maintains the baseline under UV light at low temperatures, which effectively overcome the drawbacks of low recovery typically shown by metal oxide gas sensors at low temperature.
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Mazzillo, Massimo, Antonella Sciuto, Fabrizio Roccaforte, Corrado Bongiorno, Roberto Modica, Salvatore Marchese, Paolo Badalà, et al. "Ni2Si/4H-SiC Schottky Photodiodes for Ultraviolet Light Detection." Materials Science Forum 858 (May 2016): 1015–18. http://dx.doi.org/10.4028/www.scientific.net/msf.858.1015.

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Ultraviolet (UV) monitoring is of great interest in the healthcare field to prevent excessive UV exposure risks. In the last years silicon carbide (SiC) has emerged as a suitable material for the fabrication of UV detectors. In this paper we propose a 4H-SiC Schottky photodiode with a continuous very thin Ni2Si layer operating at 0V, properly designed for UV radiation monitoring.
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Wu, Kuijun, Zihao Zhang, Jianjun Guo, Xiangrui Hu, Juan Li, Faquan Li, and Weiwei He. "Effect of UV Scattering on Detection Limit of SO2 Cameras." Remote Sensing 15, no. 3 (January 25, 2023): 705. http://dx.doi.org/10.3390/rs15030705.

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SO2 ultraviolet (UV) camera technology has been successfully applied to the accurate imaging detection of pollutant gas concentration; however, the actual detection ability of this technology has not been intensively studied, especially the detection accuracy and limit under the influence of the light dilution effect. Here, we theoretically and experimentally investigate the UV scattering on SO2 concentration inversion. The radiation transfer model of the light dilution effect is reconstructed, and the concept of the optimized detection limit is discussed. An outfield experiment is conducted on a ship exhaust, and the results are compared with the theoretical calculations, which indicates that the detection limit of the SO2 UV camera is 15 ppm·m at close range and increases to 25 ppm·m when the detection distance is 3.5 km. This study proves that the detection limit of the SO2 UV camera deteriorates with the decreasing atmospheric visibility, the lengthening detection distance, and the increasing aerosol content within the plume. In addition, the hardware indicators of the camera systems also play a key role in the detection limit, and taking reasonable image processing can significantly release the instruments’ performance and extend the applicability of the SO2 UV camera.
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Більше джерел

Дисертації з теми "UV light detection"

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Park, Tu San, Soohee Cho, Tigran G. Nahapetian, and Jeong-Yeol Yoon. "Smartphone Detection of UV LED-Enhanced Particle Immunoassay on Paper Microfluidics." SLAS TECHNOLOGY, 2017. http://hdl.handle.net/10150/623058.

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Use of a smartphone as an optical detector for paper microfluidic devices has recently gained substantial attention due to its simplicity, ease of use, and handheld capability. Utilization of a UV light source enhances the optical signal intensities, especially for the particle immunoagglutination assay that has typically used visible or ambient light. Such enhancement is essential for true assimilation of assays to field deployable and point-of-care applications by greatly reducing the effects by independent environmental factors. This work is the first demonstration of using a UV LED (UVA) to enhance the Mie scatter signals from the particle immunoagglutination assay on the paper microfluidic devices and subsequent smartphone detection. Smartphone's CMOS camera can recognize the UVA scatter from the paper microfluidic channels efficiently in its green channel. For an Escherichia coli assay, the normalized signal intensities increased up to 50% from the negative signal with UV LED, compared with the 4% to 7% with ambient light. Detection limit was 10 colony-forming units/mL. Similar results were obtained in the presence of 10% human whole blood.
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2

Newkirk, Scott Hunter. "Detection levels of drinking water contaminants using field portable ultraviolet and visible light (uv/vis) spectrophotometry /." Download the thesis in PDF, 2005. http://www.lrc.usuhs.mil/dissertations/pdf/NEWKIRK2005.pdf.

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3

Choy, Man Hon. "Investigation of the effects of the 1) UV absorbance of halide ions and 2) wall adsorption of marker ions for indirect detection in capillary electrophoresis." HKBU Institutional Repository, 2001. http://repository.hkbu.edu.hk/etd_ra/286.

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4

Gillund, Daniel P. "Light source selection and optical design of a UV absorption based detector for liquid chromatography." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101819.

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Анотація:
Thesis: M. Eng. in Manufacturing, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 48-49).
Traditional sources of UVC light for absorption spectroscopy are bulky, inefficient, and output tens to hundreds of watts of heat. In this paper we present the relative merits and disadvantages of using AIN based UVC emitting LEDs for absorption detection in liquid chromatography systems compared to traditional sources. We present the optical design for a detector based on a modular LED architecture and employing a digital micromirror device to modulate the light used in detection. The expected capabilities of a detector employing the design are derived and then compared to existing UV absorption detectors for liquid chromatography. The strategy presented in this paper holds significant advantages over existing detectors, including increased resolution and dynamic capabilities
by Daniel P. Gillund.
M. Eng. in Manufacturing
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5

Robin, Ivan-Christophe. "Solid State Material Systems for Light Emission and Light Detection." Habilitation à diriger des recherches, 2011. http://tel.archives-ouvertes.fr/tel-00607740.

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A large variety of material systems for light emission and detection were studied: from very small band gap semiconductors for infra-red (IR) detectors to wide band gap semiconductors for ultra violet (UV) emission as well as CdSe/ZnSe QDs for single photon emitters and rare earth doped oxides for laser fabrication. The growth and characterization aspects were tackled. This work will focus on the relations between the growth procedures and the optical properties. The information that can be gained from optical studies as well as the limitations of those ones will be explained in each case. Following that, a number of projects will be presented. The main one will be based on how to circumvent the problems linked with p-type doping of wide bandgap semiconductors. This project, based on field effect hole injection in wide band-gap semiconductors addresses the major challenge of fabricating efficient deep UV emitters.
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6

張喦升. "UV light emitting diode (LED)-induced fluorescence detection combined with online sample concentration techniques for use in capillary electrophoresis." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/81881177691939412746.

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Анотація:
碩士
國立臺灣師範大學
化學系
93
Abstract The application of an ultraviolet (UV) light emitting diode (LED) to on-line sample concentration/fluorescence detection in capillary electrophoresis (CE) is described. The utility of UV-LED (peak emission wavelength at 380 nm, ~ 2 mW) for fluorescence detection is demonstrated by examining a naturally fluorescent (riboflavin) and a non-fluorescent compound (tryptophan), respectively. The detection limit for riboflavin was determined to be 0.2 ppm by the normal MEKC mode and this was improved to 3 ~ 7 ppb when a dynamic pH-junction techniques were applied. On the other hand, the detection limit of the tryptophan derivative was determined to be 1.5 ppm using the MEKC mode and this was improved to 3 ppb when the sweeping-MEKC mode was applied. In an analysis of an actual sample, the concentrations of riboflavin and tryptophan in beer and urine/milk samples were determined, respectively.
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7

Li, Y. "Miniaturised liquid chromatography." Thesis, 2018. https://eprints.utas.edu.au/29985/1/Li_whole_thesis_ex_pub_mat.pdf.

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Underlying trends towards portable analytical instrumentation over the last few decades have not been equally reflected in the development of miniaturised and portable liquid chromatography (LC) instrumentation for rapid on-site or in-field measurements. Difficulties in accessing appropriate components have inhibited the design and fabrication of effective miniaturised LC systems. Additionally, the current small market for portable LC in comparison with some other miniaturised and portable analytical devices creates impediments to their commercial development. Therefore, the overall objective of this project has been to develop a new approach in designing a miniaturised portable LC based on a modular design that would harness the advantages of integrating different technologies offering flexibility in its configurations and use. In this process, it is necessary to explore available technologies, as well as develop new technologies, and integrate them in a miniaturised capillary LC system. This miniaturised capillary LC system with gradient elution capability was designed and the performance of each of the miniaturised component modules was tested and optimised. The design was based on a flexible modular system using primarily off-the-shelf components to ensure wide accessibility to the broader analytical community. A miniaturised capillary LC system was assembled on a breadboard, containing syringe pumps and switching valves, with an injection valve and on-capillary detectors, all controlled by a PC. Four miniaturised syringe pumps, with 5, 20 and 100 μL syringe options, formed the basis of the pumping system. Two pairs of pumps were used for each mobile phase to create gradient elution capability. The two pairs of syringe pumps were linked by two microfluidic switching valves and connected directly through a zero void volume cross-connector, thus providing a low hold-up volume for gradient formation. Sample was injected by a 20 nL nano LC injection valve or a newly developed miniaturised LC injection valve. The electrically actuated valve features a very small size (65 x 19 x 19 mm) and light weight (33 g), and therefore can be easily integrated in a miniaturised modular capillary LC system suited for portable and/or field analysis. The internal volume of the injection valve was determined as 98 nL. The novel conical shape of the stator and rotor and the spring-loaded rotor performed well up to 32 MPa (4641 psi). A range of chromatographic columns suitable for operation under medium pressure range were selected and characterised. The range of selected columns covered anion-exchange, cation-exchange and reversed-phase separations. The retention of 15 biogenic amines and amino acids with three capillary cation-exchange columns IonPac CS19, CS12A and CS17 (250 x 0.4 mm ID, all from Thermo Fisher Scientific) with medium, medium low and ultra-low hydrophobicity and either carboxylic or mixed carboxylic/phosphonic acid functional groups was investigated. A new deep UV-LED-based photometric detection system for miniaturised LC was developed to complement the injector system. The development of the detection system included the study of new generation aluminium nitride (AIN) substrate based deep UV-LED, the development of a new 235 nm on-capillary photometric detector and the development of a deep UV Z-typed flow cell photometric detector, with an LED under 250 nm featured in analytical chemistry for the first time. The performance of the miniaturised LC system was evaluated theoretically and experimentally, including the maximum operating pressure, gradient mixing performance, and the performance of the detectors. The 5 μL syringe pump offered the best performance, with typical maximum operating pressures up to 11.4 ± 0.4 MPa and gradient pumping reproducibility of between 4% to 9% for gradients between 0.10 % s\(^{-1}\) and 0.33 % s\(^{-1}\). The RSD (relative standard deviation) values of tR and peak areas of 6 successive isocratic runs were 0.5%-0.7% and 1.8%-2.8% for the separation of biogenic amines, respectively, and 0.1 %-0.2% and 2.1%-3.0% for the separation of cations, respectively. Test solutes of charged and uncharged dyes, and pharmaceuticals showed typical RSD values of 0.1 –0.2 % and 0.6 -1.0 % in isocratic mode and 1.2 – 4.6% and 3.2 – 6.4% in gradient mode, respectively for tR and peak area reproducibility. The overall performance of the miniaturised modular LC was found in most parameters to be comparable or superior to most other reported miniaturised LC systems, with a clear potential to be portable. The potential of the platform for on-site analysis in future has been demonstrated.
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Kuo, Ta-Wei, and 郭大維. "Characterization and Preparation of Single-Crystalline SiCN Thin Film on Porous-Si Substrates and its Application in High-Temperature UV Light Detector." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/14482713862636431910.

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Анотація:
碩士
國立成功大學
微電子工程研究所碩博士班
94
Silicon carbon nitride (SiCN) has been a promising material for many studies owing to its better physical characteristics for wide applications. In this thesis, we develop a technique for growing single-crystalline SiCN films on PS(porous-Si)/Si substrates. The high resistivity and less stress unique characteristics make the PS layer an attractive material for high temperature and low leakage current device. In this work, the PS layers are firstly formed on the Si substrates by an electrochemical anodization method. Next, SiCN films are deposited by a RTCVD system. With the SiCN films, new SiCN ultra-violet (UV) light detectors devices for application in high voltage and high temperature are developed. The performance of the SiCN/PS hetrojunction UV light detector is examined by the photo/dark current ratio and reverse breakdown voltage. The current ratio is about 95 at room temperature and 2~3 at 190℃. The reverse breakdown voltage is about -48V at room temperature and -15V at 190℃. Based on the experimental results, the developed SiCN films on porous-Si are more suitable for preparation of high temperature UV light detectors.
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Книги з теми "UV light detection"

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Wright, A. G. The Photomultiplier Handbook. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780199565092.001.0001.

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This handbook is aimed at helping users of PMTs who are faced with the challenge of designing sensitive light detectors for scientific and industrial purposes. The raison d’être for photomultipliers (PMTs) stems from four intrinsic attributes: large detection area, high, and noiseless gain, and wide bandwidth. Detection involves a conversion process from photons to photoelectrons at the photocathode. Photoelectrons are subsequently collected and increased in number by the action of an incorporated electron multiplier. Photon detection, charge multiplication, and many PMT applications are statistical in nature. For this reason appropriate statistical treatments are provided and derived from first principles. PMTs are characterized by a range of photocathodes offering detection over UV to infra-red wavelengths, the sensitivities of which can be calibrated by National Laboratories. The optical interface between light sources and PMTs, particularly for diffuse or uncollimated light, is sparsely covered in the scientific literature. The theory of light guides, Winston cones, and other light concentrators points to means for optimizing light collection subject to the constraints of Liouville’s theorem (étandue). Certain PMTs can detect single photons but are restricted by the limitations of unwanted background ranging in magnitude from a fraction of a photoelectron equivalent to hundreds of photoelectrons. These sources, together with their correlated nature, are examined in detail. Photomultiplier biasing requires a voltage divider comprising a series of resistors or active components, such as FETs. Correct biasing provides the key to linear operation and so considerable attention is given to the treatment of this topic. Electronic circuits and modules that perform the functions of charge to voltage conversion, pulse shaping, and impedance matching are analysed in detail.
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Частини книг з теми "UV light detection"

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Neilands, O., N. Kirichenko, I. Muzikante, E. Fonavs, L. Gerca, S. Jursenas, R. Valiokas, R. Karpicz, and L. Valkunas. "Detection of Blue Light by Self-Assembled Monolayer of Dipolar Molecules." In UV Solid-State Light Emitters and Detectors, 261–69. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2103-9_22.

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Yokoyama, Wallace H., and Benny E. Knuckles. "Multiple Detection (Light Scattering, Fluorescence, Refractive Index, and UV) in Size-Exclusion Chromatography of Soluble Glucan Polymers." In ACS Symposium Series, 141–49. Washington, DC: American Chemical Society, 2004. http://dx.doi.org/10.1021/bk-2005-0893.ch008.

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3

Vaitkus, J. V., W. Cunningham, M. Rahman, K. M. Smith, and S. Sakai. "Semi-Insulating GaN and its First Tests for Radiation Hardness as an Ionizing Radiation Detector." In UV Solid-State Light Emitters and Detectors, 279–86. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2103-9_24.

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4

Anton Okhai, Timothy, Azeez O. Idris, Usisipho Feleni, and Lukas W. Snyman. "Nanomaterial-Enhanced Receptor Technology for Silicon On-Chip Biosensing Application." In Biosensor - Current and Novel Strategies for Biosensing [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94249.

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Nanomaterials integration in biosensors designs are known to enhance sensing and signaling capabilities by exhibiting remarkably high surface area enhancement and intrinsic reactivity owing to their distinctive optical, chemical, electrical and catalytic properties. We present the synthesis and characterization of silver nanoparticles (AgNPs), and their immobilization on a silicon on-chip biosensor platform to enhance sensing capability for prostate specific antigen (PSA) - cancer biomarkers. Several techniques, including UV-Visible (UV-Vis) absorption spectrum, Fourier transforms infrared spectroscopy (FTIR), high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM) and field emission scanning electron microscopy (FESEM) were used for characterizing the AgNPs. The biochemical sensor consists of AgNPs immobilized on the receptor layer of a silicon avalanche mode light emitting device (Si AM LED) which enables on-chip optical detection biological analytes. A bio-interaction layer etched from the chip interacts with the evanescent field of a micro dimensioned waveguide. An array of detectors below the receptor cavity selectively monitor reflected light in the UV, visible, infrared and far infrared wavelength regions. AgNPs used as an immobilization layer in the receptor layer enhances selective absorption analytes, causing a change in detection signal as a function of propagation wavelength as light is dispersed. The analytes could range from gases to cancer biomarkers like prostate specific antigen.
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Li, Ping, Han Jiang, Jiayi Xiong, Mengqi Fu, Xianpu Huang, Boxun Huang, and Qing Gu. "Foodborne Pathogens of Enterobacteriaceae, Their Detection and Control." In Enterobacteria [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.102086.

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Анотація:
Foodborne pathogens of Enterobacteriaceae including Escherichia coli, Salmonella, Shigella, Yersinia, etc., causes a great number of diseases and has a significant impact on human health. Here, we reviewed the prevalence, virulence, and antimicrobial susceptibility of Enterobacteriaceae belonging to 4 genera: E. coli, Salmonella, Shigella, and Yersinia. The routes of the pathogens’ transmission in the food chain; the antimicrobial resistance, genetic diversity, and molecular epidemiology of the Enterobacteriaceae strains; novel technologies for detection of the bacterial communities (such as the molecular marker-based methods, Immunoaffinity based detection, etc.); and the controlling of the foodborne pathogens using chemical/natural compounds or physical methods (such as UV-C and pulsed-light treatment, etc.), is also summarized.
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Kolanoski, Hermann, and Norbert Wermes. "Photodetectors." In Particle Detectors, 405–36. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198858362.003.0010.

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The chapter covers photodetectors for photons in the optical and near UV range (about 200 nm to 700 nm). Important for particle and astroparticle experiments are photodetectors which detect light generated in scintillation or Cherenkov detectors, for example. The detection of photons always starts with the generation of an electron by photoeffect at a photocathode. The photoelectron can then be either multiplied in a photomultiplier tube by secondary electron emission or the cathode could be the surface of a semiconductor detector; both techniques can also be combined in hybrid photodetectors. A relatively new semiconductor detector is the silicon photomultiplier using an avalanche operation mode to obtain sufficiently large signals. In the last section the different photodetectors are compared and are assigned to typical applications according to their properties.
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"Using UV Light to Engineer Biosensors for Cancer Detection: The Case of Prostate Specifi c Antigen." In Biosensors and Cancer, 394–411. CRC Press, 2012. http://dx.doi.org/10.1201/b12737-26.

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Chandra Neupane, Anil. "Food Detection and Feeding Behavior of Three Species of Household Cockroaches, Blatella germanica (L.), Periplaneta americana (L.), and Supella longipalpa (F.)." In Arthropods - New Advances and Perspectives [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.108499.

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German cockroaches (Blatella germanica L.), American cockroaches (Periplaneta americana L.,) and brown-banded cockroaches (Supella longipapla F.) are the most important urban insect pests. The food detection and feeding behavior of these cockroaches are varied and depend on different factors. German cockroach starts feeding between 7:00–10:00 pm and 4:00–5:00 am, whereas the American cockroach starts within the first few hours of darkness followed by an inactive period in the latter part, and throughout the light period. The calling in females of brown-banded cockroaches followed periodicity and peak calling occurs in the scotophase. Likewise, the behavioral response of male brown-banded cockroaches was at a peak in the scotophase. German cockroach compound eye is sensitive to blue-green portion of the spectrum (major) and ultraviolet (UV) (minor). The compound eye of the American cockroach received the blue-green and violet (or ultraviolet) regions of the spectrum. Information on the compound eye sensitivity of brown-banded cockroaches is limited. The possession of specific hygroreceptors could play an important role in both German and American cockroaches. The German cockroach preferred carbohydrates food and consumed more containing starch, glucose, sucrose, mannitol, maltose, sorbitol, or glycerol. Very limited studies were carried out to determine the food detection ability and the feeding behavior of the brown-banded cockroach. Future studies should be directed toward the color preferences of the brown-banded cockroach.
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Jordan, Robert B. "Inorganic Photochemistry." In Reaction Mechanisms of Inorganic and Organometallic Systems. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780195301007.003.0009.

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Electromagnetic radiation in the form of UV and visible light has long been used as a reactant in inorganic reactions. The energy of light in the 200- to 800-nm region varies between 143 and 36 kcal mol-1, so it is not surprising that chemical bonds can be affected when a system absorbs light in this readily accessible region. Systematic mechanistic studies in this area have benefited greatly from the development of lasers that provided intense monochromatic light sources and from improvements in actinometers to measure the light intensity. Prior to the laser era, it was necessary to use filters to limit the energy of the light used to a moderately narrow region or to just cut off light below a certain wavelength. Pulsed-laser systems also allow much faster monitoring of the early stages of the reaction and the detection of primary photolysis intermediates. The systems discussed in this chapter have been chosen because of their relationship to substitution reaction systems discussed previously. For a broader assessment of this area, various books and review articles should be consulted. Mechanistic photochemistry incorporates features of both electron-transfer and substitution reactions, but the field has some of its own terminology, which is summarized as follows: The quantum yield,F , is the number of defined events, in terms of reactant or product, that occur per photon absorbed by the system. An einstein, E, is defined as a mole of photons, and if n is the moles of reactant consumed or product formed, then F = n/E. For simple reactions F£ 1 but can be >1 for chain reactions. An actinometer is a device used to measure the number of einsteins emitted at a particular wavelength by a particular light source. Photon-counting devices are now available and secondary chemical actinometers have been developed, such as that based on the Reineckate ion, Cr(NH3)2(NCS)4-, as well as the traditional iron(III)-oxalate and uranyl-oxalate actinometers. An early problem in this field was the lack of an actinometer covering the 450- to 600-nm range and the Reineckate actinometer solved this problem.
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Stevens, Martin. "For My Eyes Only." In Secret Worlds, 53–84. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198813675.003.0003.

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This chapter explores how vision is used by animals and the diversity in ways of seeing. It first details how colour vision works, focusing on the example of honeybees, which, like humans, are trichromatic and have good colour vision. Bees have a dedicated ultraviolet (UV) receptor, and then one for seeing shortwave (blue) and mediumwave (green) light. Other animals deviate more substantially, in that they have either more or fewer receptors used in colour vision, and hence different ‘dimensions’ of colour perception. The chapter then considers how jumping spiders use UV vision in identifying known or suitable prey species, as well as in mating. It also looks at polarisation vision in mantis shrimp. Mantis shrimp are bizarre in the number of receptors they have, each sensitive to different parts of the light spectrum. Finally, the chapter assesses how toads recognize prey from non-prey. The toad’s visual system acts as a ‘feature detector’ based on several stages of visual processing, producing a quick and appropriate response to a set of criteria that reliably encode objects of particular importance—in this case, food.
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Тези доповідей конференцій з теми "UV light detection"

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Kume, N., K. Okazaki, T. Hoshi, N. Sakamoto, A. Sumita, Y. Miyahara, and J. Takagi. "Alpha Emitter Detection Systems Using UV light Detector." In Digital Holography and Three-Dimensional Imaging. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/dh.2021.dth5f.5.

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Peng, Wenbo, Xiaochuan Guo, Yahui Cai, Shuwen Guo, Xiaolong Zhao, and Yongning He. "ZnO Wheatstone bridge for UV light detection." In 2021 IEEE 14th International Conference on ASIC (ASICON). IEEE, 2021. http://dx.doi.org/10.1109/asicon52560.2021.9620506.

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Lin, Fangsheng, Tiecheng Li, and Muyao Ji. "Research on irradiance calibration in UV curing light source." In Ninth Symposium on Novel Photoelectronic Detection Technology and Applications (NDTA2022), edited by Wenqing Liu, Hongxing Xu, and Junhao Chu. SPIE, 2023. http://dx.doi.org/10.1117/12.2666621.

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4

Soloviev, Stanislav, Sergei Dolinsky, Sabarni Palit, Xingguang Zhu, and Peter Sandvik. "Silicon carbide solid-state photomultiplier for UV light detection." In SPIE Sensing Technology + Applications, edited by Debbie G. Senesky and Sachin Dekate. SPIE, 2014. http://dx.doi.org/10.1117/12.2050476.

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Pourjamal, Sara, Thomas Lindvall, and Thomas Fordell. "Ultra-Stable, Continuous-Wave UV Light Source for Precision Thermometry." In Conference on Lasers and Electro-Optics/Pacific Rim. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleopr.2022.cfp6j_05.

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An ultra-stable light source and optical detection set-up for high-precision measurements of 114Cd absorption lines is presented. The experimental setup for ultraviolet light at 326.2 nm is described with an aim toward primary thermometry.
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Broberg, P., and A. Runnemalm. "Analysis algorithm for surface crack detection by thermography with UV light excitation." In 2016 Quantitative InfraRed Thermography. QIRT Council, 2016. http://dx.doi.org/10.21611/qirt.2016.014.

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Zhong, Haizheng, Mengjiao Zhang, Lingxue Wang, Linghai Meng, Xian-gang Wu, Qinwen Tan, Yuanjin Chen, Feng Jiang, and Yi Cai. "Quantum dots enhanced UV response of silicon photodetectors for broadband light detection (Conference Presentation)." In Advanced Manufacturing Technologies for Micro- and Nanosystems in Security and Defence, edited by Andrea Camposeo, Yuris Dzenis, Maria Farsari, and Luana Persano. SPIE, 2018. http://dx.doi.org/10.1117/12.2320069.

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Kamata, Norihiko, Ken Matsuda, Sota Shirai, Zentaro Honda, and Hideki Hirayama. "Detection of Nonradiative Recombination Levels in UV-LEDs by Irradiating Below-Gap Excitation Light." In 2019 Compound Semiconductor Week (CSW). IEEE, 2019. http://dx.doi.org/10.1109/iciprm.2019.8819176.

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VOROZOV, N. N., V. A. YAKOVTSEVA, S. A. VOLCHEK, P. S. SMERTENKO, T. Ya GORBACH, and V. P. KOSTYLOV. "TEXTURED POROUS SILICON FOR EFFICIENT LIGHT DETECTION IN UV, VIS AND NIR SPECTRUM RANGES." In Physics, Chemistry and Application of Nanostructures - Reviews and Short Notes to Nanomeeting 2003. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812796738_0126.

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Santonicola, M. Gabriella, Marta G. Coscia, Matteo Sirilli, and Susanna Laurenzi. "Nanomaterial-based biosensors for a real-time detection of biological damage by UV light." In 2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2015. http://dx.doi.org/10.1109/embc.2015.7319368.

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Звіти організацій з теми "UV light detection"

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Figiel, Jeffrey James, Mary Hagerott Crawford, Michael Anthony Banas, Darcie Farrow, Andrew M. Armstrong, Darwin Keith Serkland, Andrew Alan Allerman, and Randal L. Schmitt. Final LDRD report : development of advanced UV light emitters and biological agent detection strategies. Office of Scientific and Technical Information (OSTI), December 2007. http://dx.doi.org/10.2172/950095.

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Koziel, Jacek, Yael Laor, Jeffrey Zimmerman, Robert Armon, Steven Hoff, and Uzi Ravid. Simultaneous Treatment of Odorants and Pathogens Emitted from Confined Animal Feeding Operations (CAFOs) by Advanced Oxidation Technologies. United States Department of Agriculture, January 2009. http://dx.doi.org/10.32747/2009.7592646.bard.

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A feasibility study was conducted, aiming to explore the potential effectiveness of UV/TiO2/O3 photooxidation technologies for simultaneous treatment of odorant and pathogen emissions from livestock and poultry operations. Several key parameters were tested in laboratory (US) and semi-pilot (Israel) scale conditions including: the effects of light energy dose (treatment time and light intensity), relative humidity and air temperature, UV wavelength, presence of photocatalyst (TiO2) and the presence of ozone. Removal and conversion of odor, target gases (sulfur-containing volatile organic compounds S-VOCs, volatile fatty acids (VFAs), phenolics, and ammonia), and airborne pathogens was tested. Up to 100% removal (below method detection level) of S-VOCs, VFAs, and phenolics, the overall odor, and up to 64.5% of ammonia was achieved with optimized treatment. Treatments involving deep UV band (185 nm) and photocatalyst (TiO2) were more efficient in removal/conversion of odorous gases and odor. The estimate of the operational cost of treatment was based on measured emissions of several odorous VOCs from full scale, commercial swine farm ranges from $0.15 to $0.59 per finisher pig. This figure represents significantly lower cost compared with the cost of biofiltration or air scrubbing.
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Tao, Yang, Amos Mizrach, Victor Alchanatis, Nachshon Shamir, and Tom Porter. Automated imaging broiler chicksexing for gender-specific and efficient production. United States Department of Agriculture, December 2014. http://dx.doi.org/10.32747/2014.7594391.bard.

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Extending the previous two years of research results (Mizarch, et al, 2012, Tao, 2011, 2012), the third year’s efforts in both Maryland and Israel were directed towards the engineering of the system. The activities included the robust chick handling and its conveyor system development, optical system improvement, online dynamic motion imaging of chicks, multi-image sequence optimal feather extraction and detection, and pattern recognition. Mechanical System Engineering The third model of the mechanical chick handling system with high-speed imaging system was built as shown in Fig. 1. This system has the improved chick holding cups and motion mechanisms that enable chicks to open wings through the view section. The mechanical system has achieved the speed of 4 chicks per second which exceeds the design specs of 3 chicks per second. In the center of the conveyor, a high-speed camera with UV sensitive optical system, shown in Fig.2, was installed that captures chick images at multiple frames (45 images and system selectable) when the chick passing through the view area. Through intensive discussions and efforts, the PIs of Maryland and ARO have created the protocol of joint hardware and software that uses sequential images of chick in its fall motion to capture opening wings and extract the optimal opening positions. This approached enables the reliable feather feature extraction in dynamic motion and pattern recognition. Improving of Chick Wing Deployment The mechanical system for chick conveying and especially the section that cause chicks to deploy their wings wide open under the fast video camera and the UV light was investigated along the third study year. As a natural behavior, chicks tend to deploy their wings as a mean of balancing their body when a sudden change in the vertical movement was applied. In the latest two years, this was achieved by causing the chicks to move in a free fall, in the earth gravity (g) along short vertical distance. The chicks have always tended to deploy their wing but not always in wide horizontal open situation. Such position is requested in order to get successful image under the video camera. Besides, the cells with checks bumped suddenly at the end of the free falling path. That caused the chicks legs to collapse inside the cells and the image of wing become bluer. For improving the movement and preventing the chick legs from collapsing, a slowing down mechanism was design and tested. This was done by installing of plastic block, that was printed in a predesign variable slope (Fig. 3) at the end of the path of falling cells (Fig.4). The cells are moving down in variable velocity according the block slope and achieve zero velocity at the end of the path. The slop was design in a way that the deacceleration become 0.8g instead the free fall gravity (g) without presence of the block. The tests showed better deployment and wider chick's wing opening as well as better balance along the movement. Design of additional sizes of block slops is under investigation. Slops that create accelerations of 0.7g, 0.9g, and variable accelerations are designed for improving movement path and images.
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