Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 25 for “"UV-C"”.
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Μελέτη της επίδρασης ακτινοβολίας UV-C στην ολευρωπεϊνη και στα ανάλογά της
Τα ιριδοειδή και σεκοϊριδοειδή αποτελούν δευτερογενείς μεταβολίτες φυτικής προέλευσης με σημαντικό φαρμακολογικό ενδιαφέρον και ποικίλες δομικές ιδιαιτερότητες, καθιστώντας τα ελκυστικά μόρια για στοχευμένη χημική τροποποίηση. Η φωτοχημεία, ως μια ήπια και περιβαλλοντικά φιλική συνθετική …
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Non chemical alternatives for pest management: Entomopathogenic nematodes and UV-C light
… Heterorhabditis indica; and, 2) the efficacy of UV-C radiation applied, pre-transport, as a preventative disease control strategy against Botrytis cinerea. A study was conducted testing EPN infectious juvenile (IJ) rearing production counts and IJ viability after a six-day storage period. When …
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UV-C as a Pre-treatment Option against Microalgae in Drinking Water Facilities
… This study aims to gain insight into how UV-C affects the viability of microalgae; this can inform the use of Ultraviolet type C (UV-C) as a pre-treatment. It is hypothesized that UV-C tolerance is connected to thylakoid stack size, cell shape and size and photoprotecting …
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Evaluación de la eficacia de la combinación de permanganato potásico y radiación UV-C en la conservación de frutos climatéricos y su impacto en la calidad sensorial y la reducción de pérdidas postcosecha.
… de permanganato de potasio y radiación UV-C, sobre productos vegetales de interés para el sector hortofrutícola. Los productos seleccionados fueron el melocotón, la pera, el tomate, el albaricoque, ciertas plantas aromáticas y el brócoli. Se simularon situaciones de almacenamiento en las …
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Identification of Near-Uv Chromophores and Characterization of Cellular Responses to Near-Uv Damage and Oxygen Stress
… effect. DNA is the primary chromophore in the UV-C region of electromagnetic spectrum (100-280nm; also known as Far UV or germicidal-UV), and its interaction with UV-C has been extensively studied. However, DNA has very little absorbance in the UV-A region (315-400nm). The identification of …
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Degradation of polycyclic aromatic hydrocarbons in water: Alternative treatments to conventional processes.
… the combination of ultraviolet radiation in the UV-C range (UV-C) and hydrogen peroxide (H2O2). This Thesis addresses the evaluation of the efficiency of the UV-C/H2O2 oxidation system to treat water sampled from a natural reservoir polluted with AN and BaP. For this purpose, initially, the …
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Using blue light for bacterial inactivation
… sample position on plate; v) incorporation of UV-resistance plasmids and also to conduct comparisons in inactivation efficacy of: i) pulsed versus continuous exposure to 405 nm light and ii) 405 nm versus UV-C. Methods. Bacterial cultures were grown in Tryptone Soya Broth (TSB) and after …
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Using Synthetic Gene Clusters to Model Resistance Gene Evolution by Meiotic Recombination in Arabidopsis thaliana
… utility to model meiotic unequal crossing-over. UV-C treatment was shown to stimulate somatic unequal crossing over, as well as upregulate defense/stress response genes and transcription factors. Meiotic recombination may also be affected by stress. Therefore, the effect of UV-C irradiation on …
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INNOVATIVE APPROACHES TO PLANT PROTECTION AND PRODUCE SAFETY THROUGH HIGH-PRECISION PLANT MANAGEMENT SYSTEMS
… use of biocontrol agents (BCAs), ultraviolet (UV) radiation, and advanced diagnostic technologies have emerged as an innovative toolkit for integrated pest management, reducing reliance on conventional agrochemicals. In these studies, we have explored these approaches in economically relevant …
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Survival of Antarctic Bacteria Exposed to Ultraviolet and Visible Light
… 2.0% NaC1 and exposed to sunlight (20,000 Lux), UV-C (1.0 X 10⁻⁶ W/cm²), UV-B (1.0 X 10⁻⁶ W/cm²) and UV-A (1.5 X 10⁻⁶ W/cm²). The cultures were diluted to a final absorbance of 0.01 at 540 nm for sunlight and to 0.1 for the UV light exposures. All strains were sensitive to UV-C exposure with 64T …
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INVESTIGATION OF NEW THERAPEUTIC TARGETS OF RESPIRATORY VIRUSES: A NOVEL METHOD EXPLOITING UV RADIATION ¿ PROOF OF CONCEPT BASED ON SARS-COV-2 ¿
… the inhibitory effects of ultraviolet (UV) radiation that reaches the Earth's surface (UV-B, and UV-A) on SARS-CoV-2 to better characterize seasonal viral spread. Subsequently, UV-C radiation was exploited in an in vitro infection assay to develop an unbiased/multidisciplinary roadmap …
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Ultraviolet C Inactivation of <em>Salmonella enterica</em> in Raw Chicken Juice on Food Contact Surfaces with the Contamination Sanitization Inspection and Disinfection (CSI-D+) Device
… to low (5 mW/cm²) and high intensity (10 mW/cm²) UV-C at a wavelength (λ) of 275 nm using the CSI-D+ device for 15 and 30 s. The results showed that higher UV-C irradiance (10 mW/cm²) led to significantly higher <em>S.</em> <em>enterica</em> serovar Enteritidis log CFU/ml reductions across all …
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Characterization of Maize Cytochrome P450s
… to the following treatments: phenobarbital, UV-C light, wounding, and the maize bacterial pathogens Erwinia stuartii and Acidovorax avenae. The induction response of each P450 was characterized in response to these treatments. The particular effects of each treatment varied with each P450 …
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Effect of abiotic stresses on bioactive contents of vegetables and high-pressure technology in related functional beverages
… compuestos fenólicos totales (TPC en inglés) estuvieron altamente correlacionados con la capacidad antioxidante total (TAC en inglés) con un R2=0,82. Se comprobó que los estreses abióticos, como el cortado y la conservación en atmósfera de alto oxígeno (80 kPa O2), indujeron un elevado aumento de …
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Hand powered portable ultraviolet sterilizing water bottle with active UV dose sensing
… ultraviolet light bulb, rated at 253.7nm (UV-C), was integrated with a common NalgeneTM water bottle. Along with the bulb, UV. dose sensing electronics and a hand crank generator were incorporated as well, with the generator supplying power to both the bulb and the photodiode circuitry. …
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Structural and Biochemical Investigation of the Molecular Mechanisms of DNA Response and Repair in Humans and <em>Escherichia coli</em>.
… pathway are primarily responsible for repair of UV-C-induced photolesions in DNA. However, it is unclear how these two pathways are coordinated. We found the ATR-dependent checkpoint induces a rapid nuclear accumulation of the required NER factor Xeroderma pigmentosum group A (XPA) in both a …
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New Insights into the Roles of Human DNA Damage Checkpoint Protein ATR in the Regulation of Nucleotide Excision Repair and DNA Damage-Induced Cell Death
… pathways by which cells handle ultraviolet C (UV-C)- or other exogenous genotoxin-induced bulky DNA damage. However, it is unclear how these 2 pathways may be coordinated. In this study we show that ATR physically interacts with NER factor xeroderma pigmentosum group A (XPA) where an ATR …
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Packaging designs for ultraviolet light emitting diodes
… / Gallium Nitride (GaN) based deep ultraviolet (DUV) light emitting didoes (LEDs) with emission wavelengths between 200-280 nm enable key emerging technologies such as water/air purification and sterilization, covert communications and portable bio-agent detection/identification systems for …
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Exosomes and Exosomal RNA – A Way of Cell-to-Cell Communication
… has shown prognostic and diagnostic potential. Uveal melanoma is a tumour arising from melanocytes of the eye and despite successful control of the primary tumour, approximately one third of the patients will develop metastases, predominantly liver metastases, with poor prognosis. The overall …
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