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Showing 1 to 20 of 40 for “"UVC"”.
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Ultraviolet-C Powered Air Purifying Respirator (UVC PAPR)
… (PAPR) incorporating direct ultraviolet-C (UVC) germicidal irradiation. The proposed PAPR aims to provide enhanced protection by actively sterilizing air through this UVC chamber immediately prior to inhalation. This approach offers an advantage over traditional filter-based PAPRs by …
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Entwicklung von optisch pumpbaren UVC-Lasern auf AlGaN-Basis
In dieser Arbeit wurde der Einfluss verschiedener Aspekte des epitaktischen Wachstums und des Heterostrukturdesigns auf optisch gepumpte AlGaN-Laser mit Emissionswellenlängen im Bereich von 240 nm untersucht. Dabei wurden neue Erkenntnisse über elektrische und optische Verlustmechanismen gewonnen, …
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Exploring the potential of UVC in treating superficial corneal infections
… of alternative treatments. Ultraviolet C (UVC) light possesses potent broad spectrum antimicrobial activity against prokaryotic cells; bacteria, fungi, protozoa, and viruses, without demonstrating microbial resistance. Eukaryotic (mammalian) cells have an innate resistance to UVC through …
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Desinfecção de águas contaminadas com Pseudomonas aeruginosa empregando Processo de Oxidação Avançada (UVC/H2O2): desenvolvimento e modelagem
… destaque. A desinfecção via processo combinado UVC/H2O2 é um exemplo dos chamados Processos Oxidativos Avançados (POA) que têm sido largamente estudados e empregados na inativação de bactérias. No presente trabalho realizaram-se estudos acerca da cinética de inativação da bactéria Pseudomonas …
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Effectiveness of far-UVC 222 nm on Escherichia coli o157:h7 and Listeria monocytogenes across different fresh produce surfaces
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01
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Far-UVC light: A promising approach to controlling foodborne pathogens on food-contact surfaces and ready-to-eat-meat
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01
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Effects of understory vegetation manipulation on hardwood regeneration recruitment and growth in southern Appalachian forests
… at each site: Understory Vegetation Control (UVC) and Control. Permanent sampling plots and individual seedlings were located to quantify the density, recruitment, and growth of advance regeneration. Competing vegetation was significantly reduced after one year by the UVC treatment, where the …
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Caracterização molecular da mutação pso8-1/rad6 de Saccharomyces cerevisiae, sensível à fotoadição de psoralenos, à radiação UVC e a mutágenos químicos
… de psoralenos mono- e bi-funcionais, à UVC e ao MNNG, complementou o fenótipo de sensibilidade à fotoadição de psoralenos conferido pelas mutações pso1 a pso7 e assim foi chamado pso8-1. O duplo mutante pso8-1 rad4-4 foi altamente sensível à UVC, indicando assim uma interação …
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Efficacy of Ultraviolet Treatments for the Inhibition of Pathogens on the Surface of Fresh Fruits and Vegetables
… ultraviolet light at a wavelength of 253.7nm (UVC) into the inhibition of Salmonella spp. and Escherichia coli O157:H7 were conducted. The objectives of these studies were: to determine the rates for the destruction of Salmonella and Escherichia coli O157:H7 on the surface of agar and to …
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UVC Inactivation of <em>Listeria monocytogenes</em> in Salmon Juice on Food Contact Surfaces Using the Contamination Sanitation Inspection and Disinfection (CSI-D+) Device
… Inspection and Disinfection (CSI-D+) device is a UVC emitting handheld system that represents a novel approach to the detection and disinfection of microorganisms on food contact surfaces. This study aims to evaluate the disinfection module of the CSI-D+ device for L. monocytogenes within food …
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Jednoduchý elektrochemický DNA biosenzor pro detekci poškození DNA způsobeného UV zářením
… using UV lamp with two set wavelengths: UVC of 254 nm and UVA of 365 nm. UVC radiation was used to damage DNA. Relative signal decrease was 50% after 20 minutes of exposure to UVC radiation. UVA radiation was used to compare effects of different types of UV radiation. Obtained...
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Epithelial Cell Adhesion and Proliferation on Titanium(V) Biofunctionalized with Nanoceramic Thin Film
… film coating, with and without ultraviolet C (UVC) irradiation, on titanium(V) surface hydrophilicity, and adhesion and proliferation of human gingival keratinocytes. Materials and Methods: Polished titanium(V) disks were randomly divided into three groups: control (uncoated), ALD (ZrO2:TiO2 …
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Light source selection and optical design of a UV absorption based detector for liquid chromatography
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 …
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Disinfection of Foodborne Bacteria using the Contamination Sanitization Inspection and Disinfection (CSI-D) Device
… with microorganisms using ultraviolet-C (UVC) illumination. This study aimed to determine the optimal parameters for the disinfection of foodborne bacteria using the CSI-D device. The following bacterial strains were tested: generic <em>E. coli; </em>enterohemorrhagic <em>E. coli …
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O mutante pso9-1 de Saccharomyces cerevisiae, sensível a psoralenos fotoativados, contém um alelo mutante do gene MEC3 envolvido em checkpoint
… pronunciado para sensibilidade à 8-MOP + UVA e UVC, e para a supressão de mutação para frente induzida por UVC, sugerindo uma função residual para a proteína produzida por este alelo mutante.
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Regulation of BubR1 by Ultraviolet Radiation: Implications in Skin Cancer
… on human skin cell lines to assess the effect of UVC on BubR1 protein abundance. UV radiation led to the decrease of BubR1 protein and mRNA levels. In addition, β-TRCP protein abundance also showed a trend towards downregulation following UVC treatment, and a significant downregulation of both …
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PERFORMANCE OF MODIFIED HETEROGENEOUS NOVEL PAN CATALYST FOR THE REMEDIATION OF REACTIVE ORANGE 16 (RO16)
… batch and continuous flow both with and without UVc assistance. The effectiveness in the removal of the azo dye in terms of decolouration, loss of aromaticity and consumption of H2O2, COD, and TOC were compared and evaluated. The result shows that the H2O2/Fe and UVc/H2O2/Fe systems are both …
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Later Life Consequences of Developmental Mitochondrial DNA Damage in C. elegans
… lesions such as those caused by ultraviolet C (UVC) radiation and also many environmental toxicants, including benzo[a]pyrene (BaP) [8]. While these lesions cannot be repaired, they are slowly removed through a process that involves mitochondrial dynamics and autophagy [9, 10]. However, when …
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Fréquence et distribution des dimères cyclobutyliques de pyrimidines suite à une exposition aux UV et évaluation de l’effet protecteur de l’acide sulfonique 2-phénylbenzymidazole-5
… souvent été étudiés in vitro ou en utilisant des UVC alors que nous ne sommes pas exposés à ce type d’UV. L’utilisation d’écrans solaires permet de prévenir la formation des DCP. Grâce à sa capacité à absorber les UVB, l’acide sulfonique 2-phénylbenzymidazole-5 (PBSA) est utilisé dans des écrans …
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Decontamination of food and food-processing surfaces from norovirus by cold atmospheric-pressure gaseous plasma
… study between the virucidal efficacy of CAP and UVC, as another non-thermal technology, we found that UVC could inactivate FCV on both dry and wet surfaces while CAP was effective only under wet conditions. However, CAP was able to inactivate FCV at both direct and indirect exposures while UVC …
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