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Artykuły w czasopismach na temat „Ultraviolet light (UVB)”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 1 lutego 2022

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1

Wang, Pei-Wen, Yu-Chiang Hung, Tung-Yi Lin, Jia-You Fang, Pei-Ming Yang, Mu-Hong Chen, and Tai-Long Pan. "Comparison of the Biological Impact of UVA and UVB upon the Skin with Functional Proteomics and Immunohistochemistry." Antioxidants 8, no. 12 (November 20, 2019): 569. http://dx.doi.org/10.3390/antiox8120569.

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The skin provides protection against external stimuli; however, solar radiation, including ultraviolet A (UVA) and ultraviolet B (UVB), can result in profound influences on skin structure and function, which eventually impairs its molecular characteristics and normal physiology. In the current study, we performed proteome tools combined with an immunohistological approach on nude mouse skin to evaluate the adverse responses elicited by UVA and UVB irradiation, respectively. Our findings indicated that UVA significantly promotes oxidative damage in DNA, the breakdown of collagen fiber in the de

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Bowman, Robert L., Rebecca C. Hennessey, Tirzah J. Weiss, David A. Tallman, Emma R. Crawford, Brandon M. Murphy, Amy Webb, et al. "UVB mutagenesis differs in Nras- and Braf-mutant mouse models of melanoma." Life Science Alliance 4, no. 9 (July 1, 2021): e202101135. http://dx.doi.org/10.26508/lsa.202101135.

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BRAF-mutant melanomas are more likely than NRAS-mutant melanomas to arise in anatomical locations protected from chronic sun damage. We hypothesized that this discrepancy in tumor location is a consequence of the differential sensitivity of BRAF and NRAS-mutant melanocytes to ultraviolet light (UV)-mediated carcinogenesis. We tested this hypothesis by comparing the mutagenic consequences of a single neonatal, ultraviolet-AI (UVA; 340–400 nm) or ultraviolet-B (UVB; 280–390 nm) exposure in mouse models heterozygous for mutant Braf or homozygous for mutant Nras. Tumor onset was accelerated by UVB

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Marwood, Christopher A., Ralph EH Smith, John A. Furgal, Murray N. Charlton, Keith R. Solomon, and Bruce M. Greenberg. "Photoinhibition of natural phytoplankton assemblages in Lake Erie exposed to solar ultraviolet radiation." Canadian Journal of Fisheries and Aquatic Sciences 57, no. 2 (February 1, 2000): 371–79. http://dx.doi.org/10.1139/f99-258.

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Photoinhibition was examined in natural assemblages of phytoplankton from Lake Erie exposed to ambient solar radiation. The impacts on photosynthesis of photosynthetically active radiation (400-700 nm) (PAR), ultraviolet-A radiation (320-400 nm) (UVA), and ultraviolet-B radiation (295-320 nm) (UVB) were assessed at three sites on the lake using pulse amplitude modulated chlorophyll fluorescence. Short exposures (<= 30 min) to sunlight containing UVB (1.8-4.4 mmol·m-2) resulted in the rapid loss of up to 60% of photosystem II efficiency (in the dark-adapted state) (Fv/Fm) and quantum yield (

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Zocoler, Marcos Alberto, Joelma Vieira Lopes, Letícia Duarte dos Santos, Guilherme Luiz de Castro Carvalho, and Décio Gomes de Oliveira. "DESENVOLVIMENTO, AVALIAÇÃO DO EFEITO FOTOPROTETOR UVA E UVB, AÇÃO ANTIOXIDANTE E ESTABILIDADE DE UM CREME COM EXTRATOS DE UMBÚ-CAJÁ." Colloquium Vitae 11, no. 3 (December 20, 2019): 51–61. http://dx.doi.org/10.5747/cv.2019.v11.n3.v270.

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The objective of this studywas to evaluate the UVA and UVB photoprotective effect and the antioxidant activity of dermatological cream developed with umbu-cajá (Spondias sp) extracts. The antioxidant activity of the cream was evaluated by the 1,1-diphenyl-2-picrylhydrazine (DPPH) radical inhibition method in triplicate, and the dilutions were evaluated by spectrophotometer, with the absorbance values determined at 517 nm. The evaluation of UVB and UVB photoprotective capacity was performed according to Mansur method and determining the UVA / UVB ratio and the critical wavelength. The developed

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Craver, Joshua K., Chad T. Miller, Kimberly A. Williams, and Nora M. Bello. "Ultraviolet Radiation Affects Intumescence Development in Ornamental Sweetpotato (Ipomoea batatas)." HortScience 49, no. 10 (October 2014): 1277–83. http://dx.doi.org/10.21273/hortsci.49.10.1277.

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Intumescences are a physiological disorder characterized by hypertrophy and possibly hyperplasia of plant tissue cells. Ultimately, this disorder results in the death of the affected cells. Previous observations and research suggest that the quality and quantity of light to which plants are exposed may be a factor in development of the disorder. The purpose of this study was to assess the preventive effect of ultraviolet-B (UVB) radiation on intumescence development in ornamental sweetpotato (Ipomoea batatas). Two sweetpotato cultivars, Sidekick Black and Ace of Spades, were grown under light

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Pirc, Matija, Simon Caserman, Polonca Ferk, and Marko Topič. "Compact UV LED Lamp with Low Heat Emissions for Biological Research Applications." Electronics 8, no. 3 (March 21, 2019): 343. http://dx.doi.org/10.3390/electronics8030343.

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Much biomedical research focuses on the effects of UV light on human cells. UV light sources are a prerequisite for such research. This paper presents the design and achieved performance of a UVA (Ultraviolet A: 320–400 nm) and a UVB (Ultraviolet B: 290–320 nm) LED-based lamp suitable for use in bioassays, as well as inside an incubator. Numerical simulations were used to optimise the number, layout and output power of LEDs to achieve good irradiance homogeneity while maintaining low costs. Design was optimised for the efficient transfer of generated heat away from the irradiated samples throu

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Deeg, HJ, L. Bazar, M. Sigaroudinia, and M. Cottler-Fox. "Ultraviolet B light inactivates bone marrow T lymphocytes but spares hematopoietic precursor cells." Blood 73, no. 2 (February 1, 1989): 369–71. http://dx.doi.org/10.1182/blood.v73.2.369.369.

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Abstract Bone marrow cells from ten normal donors were exposed to ultraviolet (UV)C or UVB light for total exposures of 0.1 to 100 mJ/cm2, and assayed for granulocyte-macrophage colony-forming units (CFU-GM), erythroid burst-forming units (BFU-E), and phytohemagglutinin (PHA)- stimulated proliferative responses. After exposure to UVC CFU-GM, BFU-E and PHA responses showed a UV dose-dependent sharp decrease to levels less than 1% of controls with 0.5, 2.0, and 10 mJ/cm2, respectively. With UVB, PHA responses were most sensitive, declining to less than 1% at 5 mJ/cm2. BFU-E decreased to less tha

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Deeg, HJ, L. Bazar, M. Sigaroudinia, and M. Cottler-Fox. "Ultraviolet B light inactivates bone marrow T lymphocytes but spares hematopoietic precursor cells." Blood 73, no. 2 (February 1, 1989): 369–71. http://dx.doi.org/10.1182/blood.v73.2.369.bloodjournal732369.

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Bone marrow cells from ten normal donors were exposed to ultraviolet (UV)C or UVB light for total exposures of 0.1 to 100 mJ/cm2, and assayed for granulocyte-macrophage colony-forming units (CFU-GM), erythroid burst-forming units (BFU-E), and phytohemagglutinin (PHA)- stimulated proliferative responses. After exposure to UVC CFU-GM, BFU-E and PHA responses showed a UV dose-dependent sharp decrease to levels less than 1% of controls with 0.5, 2.0, and 10 mJ/cm2, respectively. With UVB, PHA responses were most sensitive, declining to less than 1% at 5 mJ/cm2. BFU-E decreased to less than 1% of c

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Haag, Robin, Nicole Sieber, and Martin Heßling. "Cataract Development by Exposure to Ultraviolet and Blue Visible Light in Porcine Lenses." Medicina 57, no. 6 (May 27, 2021): 535. http://dx.doi.org/10.3390/medicina57060535.

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Background and Objectives: Cataract is still the leading cause of blindness. Its development is well researched for UV radiation. Modern light sources like LEDs and displays tend to emit blue light. The effect of blue light on the retina is called blue light hazard and is studied extensively. However, its impact on the lens is not investigated so far. Aim: Investigation of the impact of the blue visible light in porcine lens compared to UVA and UVB radiation. Materials and Methods: In this ex-vivo experiment, porcine lenses are irradiated with a dosage of 6 kJ/cm2 at wavelengths of 311 nm (UVB

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Setaluri, Vijay, Adele R. Clark, and Steven R. Feldman. "Transmittance Properties of Flurandrenolide Tape for Psoriasis: Helpful Adjunct to Phototherapy." Journal of Cutaneous Medicine and Surgery 4, no. 4 (October 2000): 196–98. http://dx.doi.org/10.1177/120347540000400404.

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Background: Flurandrenolide tape is a valuable agent in the treatment of lichen simplex chronicus and in psoriasis. The corticosteroid is helpful for reducing the symptoms and induration of the lichen simplex chronicus lesion, and occlusion of the lesion with the tape reduces the patient's opportunity to rub and scratch the affected area. Objective: The purpose of this study was to determine to what extent flurandrenolide tape may block ultraviolet (UV) light and interfere with phototherapy of psoriasis. Methods: Flurandrenolide tape was applied to quartz spectroscopy cuvettes, and the absorpt

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Xu, Fei, and Jaroslav Vostal. "Vitamin K3 Is a Potential Ultraviolet Photosensitizer for Pathogen Reduction of Human Platelets and Plasma." Blood 120, no. 21 (November 16, 2012): 3434. http://dx.doi.org/10.1182/blood.v120.21.3434.3434.

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Abstract Abstract 3434 Human platelets are stored up to 5 days at room temperature and may support bacterial growth before transfusion. Transfusion of bacterially contaminated platelets remains the highest transfusion transmitted infectious disease risk today. One approach to reducing this risk is the development of safe and effective pathogen reduction methodologies. We evaluated UV light (A and B) with vitamin K3 (VK3) as a photosensitizer for efficacy in reducing bacterial growth in platelet concentrates and plasma. Six species of bacteria, including Bacillus cereus, Pseudomonas aeruginosa,

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Fleury, Naomi, Martin Feelisch, Prue H. Hart, Richard B. Weller, Jordan Smoothy, Vance B. Matthews, and Shelley Gorman. "Sub-erythemal ultraviolet radiation reduces metabolic dysfunction in already overweight mice." Journal of Endocrinology 233, no. 1 (April 2017): 81–92. http://dx.doi.org/10.1530/joe-16-0616.

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Exposure to sunlight may limit cardiometabolic risk. In our previous studies, regular exposure to sub-erythemal (non-burning) ultraviolet radiation (UVR) reduced signs of adiposity and cardiometabolic dysfunction in mice fed a high-fat diet. Some of the observed effects were dependent on skin release of nitric oxide after UVR exposure. Here, we examine the effects of sub-erythemal UVR on signs of adiposity and metabolic dysfunction in already overweight mice, comparing the effects of two sunlamps with distinct emitted light spectra. Mice were fed a high-fat diet from 8 weeks of age, with UVR a

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Park, Dae-Hwan, Seung-Taek Oh, and Jae-Hyun Lim. "Development of UVB LED Lighting System Based on UV Dose Calculation Algorithm to Meet Individual Daily UV Dose." Applied Sciences 9, no. 12 (June 18, 2019): 2479. http://dx.doi.org/10.3390/app9122479.

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Ultraviolet B (UVB) in sunlight is known to promote health when humans are exposed to optimum sunlight. Proper exposure to ultraviolet B is essential to produce vitamin D in the body, which is a particularly important factor for health. However, there has been an increase recently in the number of people who are lacking sunlight exposure due to staying indoors. Avoiding ultraviolet (UV) rays leads to health deterioration. To solve this problem, a portable ultraviolet measuring device that provides users with the UV intensity information of outdoor sunlight has been developed while UVB Light Em

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Ozawa, Maki, Katalin Ferenczi, Toyoko Kikuchi, Irma Cardinale, Lisa M. Austin, Todd R. Coven, Lauren H. Burack, and James G. Krueger. "312-nanometer Ultraviolet B Light (Narrow-Band UVB) Induces Apoptosis of T Cells within Psoriatic Lesions." Journal of Experimental Medicine 189, no. 4 (February 15, 1999): 711–18. http://dx.doi.org/10.1084/jem.189.4.711.

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Narrow-band (312 nm) ultraviolet B light (UVB) is a new form of therapy for psoriasis, but its mechanism of action is unknown. In a bilateral comparison clinical study, daily exposure of psoriatic plaques to broad-band UVB (290–320 nm) or 312-nm UVB depleted T cells from the epidermis and dermis of psoriatic lesions. However, 312-nm UVB was significantly more depleting in both tissue compartments. To characterize the mechanism of T cell depletion, assays for T cell apoptosis were performed on T cells derived from UVB-irradiated skin in vivo and on T cells irradiated in vitro with 312-nm UVB. A

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Hassan, Snur M. A., Adel J. Hussein, and Azad K. Saeed. "Role of Green Tea in Reducing Epidermal Thickness upon Ultraviolet Light-B Injury in BALB/c Mice." Advances in Biology 2015 (October 1, 2015): 1–6. http://dx.doi.org/10.1155/2015/890632.

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The main environmental source for skin damage is ultraviolet (UV) radiation. Many adverse effects have been recognized as the result of prolonged cutaneous exposure to solar ultraviolet radiation, such as erythema, edema, apoptosis, hyperplastic responses, photo-aging, and skin cancer development. Green tea provides photo-protection against UV radiation through many mechanisms including anti-inflammatory, immunomodulatory, and antioxidant properties. The aim of this study was to evaluate the effect of green tea in reducing epidermal thickness on mouse’s skin exposed to UVB irradiation. Thirty

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Boccumini, Louis E., Cynthia L. Fowler, Theresa A. Campbell, Linda F. Puertolas, and Kays H. Kaidbey. "Photoreaction Potential of Orally Administered Levofloxacin in Healthy Subjects." Annals of Pharmacotherapy 34, no. 4 (April 2000): 453–58. http://dx.doi.org/10.1345/aph.18134.

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OBJECTIVE: To evaluate the photoreaction potential of levofloxacin on exposure to solar-simulating radiation. Solar-simulating is ultraviolet (UV) light, defined as UVA in the 320–400 nm range and UVB in the 290–320 nm range. DESIGN: In a single-center, double-blind, randomized study, 30 adults (20 men, 10 women) received oral levofloxacin (500 mg qd x 5 d) or placebo. At baseline photoexposure prior to drug administration, each subject was exposed to UVB light at 0.75, 1.0, and 2.0 times the minimal erythema dose and to UVA light (25 J/cm2). Photoexposure was repeated on day 5, two hours foll

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Nunes, Alesandra R., Ícaro G. P. Vieira, Dinalva B. Queiroz, Antonio Linkoln Alves Borges Leal, Selene Maia Morais, Débora Feitosa Muniz, João Tavares Calixto-Junior, and Henrique Douglas Melo Coutinho. "Use of Flavonoids and Cinnamates, the Main Photoprotectors with Natural Origin." Advances in Pharmacological Sciences 2018 (November 28, 2018): 1–9. http://dx.doi.org/10.1155/2018/5341487.

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Many pathological problems are initiated by ultraviolet radiation (UVR), such as skin cancer, the most commonly diagnosed cancer worldwide. The UVA (320–400 nm) and UVB (290–320 nm) wavelengths may cause effects such as photoaging, DNA damage, and a series of cellular alterations. The UVA radiation can damage the DNA, oxidize the lipids, and produce dangerous free radicals, which can cause inflammation, modify the gene expression in response to stress, and weaken the skin immune response. With a minor penetration, the UVB radiation is more harmful, being responsible for immediate damage. Ultra

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Serafini, Mairim Russo, Cassia Britto Detoni, Paula dos Passos Menezes, Rose Nely Pereira Filho, Vanessa Silveira Fortes, Maria José Fonseca Vieira, Sílvia Stanisçuaski Guterres, Ricardo Luiz Cavalcanti de Albuquerque Junior, and Adriano Antunes de Souza Araújo. "UVA-UVB Photoprotective Activity of Topical Formulations ContainingMorinda citrifoliaExtract." BioMed Research International 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/587819.

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Exposure to solar radiation, particularly its ultraviolet (UV) component, has a variety of harmful effects on human health. Some of these effects include sunburn cell formations, basal and squamous cell cancers, melanoma, cataracts, photoaging of the skin, and immune suppression. The beneficial photoprotective effects of topical formulations with the extract,Morinda citrifolia, have not been investigated. This present study aims to investigate the potential benefits ofM. citrifoliatopical application on the dorsal skin of mice, exposed to UVA-UVB light. Using 7 days of treatment, [before (base

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Holtby, L. Blair, and Max L. Bothwell. "Effects of solar ultraviolet radiation on the behaviour of juvenile coho salmon (Oncorhynchus kisutch): avoidance, feeding, and agonistic interactions." Canadian Journal of Fisheries and Aquatic Sciences 65, no. 4 (April 1, 2008): 701–11. http://dx.doi.org/10.1139/f08-013.

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The behaviour of juvenile coho salmon (Oncorhynchus kisutch) was observed in outdoor experimental flumes in which three different spectral regimes were created by plastic covers that selectively blocked all or portions of natural ultraviolet radiation (UVR). The three light treatments were (i) photosynthetically active radiation (PAR, 400–700 nm), (ii) PAR plus longer wavelength ultraviolet (PAR + UVA, 320–700 nm), and (iii) full-spectrum sunlight with both long and short wavelength ultraviolet included (PAR + UVA + UVB, 280–700 nm). Observations made at different times of the day and under bo

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Yousefi, Hossein, Samira Mohammadzadeh, Arsalan Irompour, Neda Shenasifam, Elham Roshandel, and Arsalan Jalili. "Overall study on molecular pathways of skin cancer derived from Ultra- violet radiation as an environmental threat." Environment Conservation Journal 16, SE (December 5, 2015): 547–55. http://dx.doi.org/10.36953/ecj.2015.se1665.

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An important part of solar radiation is considered to be Ultraviolet radiation. Though through passing ozone layer it is progressively filtered. Due to the depletion of the ozone layer, the filtering activity of the latter is reduced and as a result more UV radiation, UVB in particular, reaches the Earth’s surface. Ultraviolet radiation is composed of three different wavelengths: UVA, UVB and UVC. Although UVC isn't a cause of skin cancer, UVA and UVB play different roles as for tanning, burning, and photo aging. As a matter of fact, Ultraviolet light can damage DNA in the epidermis. However,

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Maeda, Tomoko, Chunhai Hao, and Victor A. Tron. "Ultraviolet Light (UV) Regulation of the TNF Family Decoy Receptors DcR2 and DcR3 in Human Keratinocytes." Journal of Cutaneous Medicine and Surgery 5, no. 4 (July 2001): 294–98. http://dx.doi.org/10.1177/120347540100500402.

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Background: Several additional members of the tumor necrosis factor (TNF) receptor family were recently identified. The existence of such receptors, which may play distinct and unique regulatory roles, suggests that complex regulatory mechanisms are involved in apoptosis. Objective: This study examines the expression of several members of the TNF receptor family in human keratinocytes exposed to ultraviolet B (UVB) irradiation. Methods: Human keratinocytes were exposed to increasing doses of UVB, total RNA was harvested, and a quantitative RNase protection assay was performed. Results: Decoy r

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Lian, Yu, Lei Mai, Nancy Cromar, Neil Buchanan, Howard Fallowfield, and Xiaoming Li. "MS2 coliphage and E. coli UVB inactivation rates in optically clear water: dose, dose rate and temperature dependence." Water Science and Technology 78, no. 10 (December 11, 2018): 2228–38. http://dx.doi.org/10.2166/wst.2018.509.

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Abstract Natural ultraviolet irradiance disinfection is known to play a significant role in both natural wastewater treatment systems and drinking water disinfection processes, while the influence of ultraviolet B (UVB) delivering method on sunlight disinfection outcome is still unclear. This study aims to determine the effects of environmentally relevant temperatures, UVB doses (J m−2) and dose rates (W m−2) on the inactivation and log reduction values (LRVs) of the F-RNA coliphage MS2 and Escherichia coli in optically clear water. E. coli and MS2 were separately incubated and irradiated at f

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Song, Han Sung, Young Jin Yoo, Gil Ju Lee, Ki Soo Chang, and Young Min Song. "Optical Design of Porous ZnO/TiO2 Films for Highly Transparent Glasses with Broadband Ultraviolet Protection." Journal of Nanomaterials 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/2738015.

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We present a design of a bilayer porous film structure on a glass substrate for the highly efficient ultraviolet (UV) protection with high visible-light transparency. To effectively block UVB (280–315 nm) and UVA (315–400 nm), titanium dioxide (TiO2) and zinc oxide (ZnO) are used as absorbing layers having the appropriate coverages in different UV ranges with extinction coefficients, respectively. We show the process of refractive index (RI) matching by controlling porosity (Pr). Effective RIs of porous media with TiO2 and ZnO were calculated based on volume averaging theory. Transmittances of

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Ortega-Retuerta, E., U. Passow, C. M. Duarte, and I. Reche. "Effects of ultraviolet B radiation on (not so) transparent exopolymer particles." Biogeosciences 6, no. 12 (December 17, 2009): 3071–80. http://dx.doi.org/10.5194/bg-6-3071-2009.

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Abstract. Transparent exopolymer particles (TEP) are the most ubiquitous gel particles in the ocean and form abiotically from dissolved precursors. Although these particles can accumulate at the ocean surface, being thus exposed to intense sunlight, the role of solar radiation for the assembly and degradation of TEP is unknown. In this study, we experimentally determined the effects of visible and ultraviolet B (UVB) radiation on (1) TEP degradation (photolysis experiments), (2) TEP assembly from dissolved polymers (photoinhibition experiments) and (3) TEP release by microorganisms. Solar radi

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Ortega-Retuerta, E., U. Passow, C. M. Duarte, and I. Reche. "Effects of ultraviolet B radiation on (not so) transparent exopolymer particles." Biogeosciences Discussions 6, no. 4 (July 28, 2009): 7599–625. http://dx.doi.org/10.5194/bgd-6-7599-2009.

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Abstract. Transparent exopolymer particles (TEP) are the most ubiquitous gel particles in the ocean and form abiotically from dissolved precursors. Although these particles can accumulate at the ocean surface, being thus exposed to intense sunlight, the role of solar radiation on the assembly and degradation of TEP is unknown. In this study, we experimentally determined the effects of visible and ultraviolet B (UVB) radiation on (1) TEP degradation (photolysis experiments), (2) TEP assembly from dissolved polymers (photoinhibition experiments) and (3) TEP release by microorganisms. Solar radia

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Cornaghi, Laura, Francesca Arnaboldi, Rossella Calò, Federica Landoni, William Franz Baruffaldi Preis, Laura Marabini, and Elena Donetti. "Effects of UV Rays and Thymol/Thymus vulgaris L. Extract in an ex vivo Human Skin Model: Morphological and Genotoxicological Assessment." Cells Tissues Organs 201, no. 3 (2016): 180–92. http://dx.doi.org/10.1159/000444361.

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Ultraviolet (UV) radiation is the major environmental factor affecting functions of the skin. Compounds rich in polyphenols, such as Thymus vulgaris leaf extract and thymol, have been proposed for the prevention of UV-induced skin damage. We compared the acute effects induced by UVA and UVB rays on epidermal morphology and proliferation, cytotoxicity, and genotoxicity. Normal human skin explants were obtained from young healthy women (n = 7) after informed consent and cultured at the air-liquid interface overnight. After 24 h, the samples were divided in 2 groups: the former exposed to UVA (16

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Wei, Yongxiang, Weichao Zheng, Baoming Li, Qin Tong, Haipeng Shi, and Xuanyang Li. "Effects of B-Wave Ultraviolet Supplementation Using Light-Emitting Diodes on Caged Laying Hens during the Later Phase of the Laying Cycle." Animals 10, no. 1 (December 19, 2019): 15. http://dx.doi.org/10.3390/ani10010015.

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Caged laying hens are prone to calcium deficiencies, resulting in osteoporosis and egg quality deterioration during the later phase of the laying cycle. Fluorescent light and light-emitting diodes (LEDs), which are widely used in poultry houses now, are both deficient in ultraviolet (UV) light, the lack of which is detrimental to chickens’ welfare and health. This study was conducted to investigate the effects of UVB light supplementation using LEDs on the bone traits, blood parameters, laying performance, and egg quality for caged laying hens at 68–75 weeks. In total, 120 Jingfen laying hens

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Hu, Linping, Can Yang, Lina Zhang, Jing Feng, and Wanpeng Xi. "Effect of Light-Emitting Diodes and Ultraviolet Irradiation on the Soluble Sugar, Organic Acid, and Carotenoid Content of Postharvest Sweet Oranges (Citrus sinensis (L.) Osbeck)." Molecules 24, no. 19 (September 22, 2019): 3440. http://dx.doi.org/10.3390/molecules24193440.

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Mature ‘Hamlin’ sweet oranges (Citrus sinensis (L.) Osbeck) were irradiated using light-emitting diodes (LEDs) and ultraviolet (UV) light for six days after harvest. Based on evaluation of the basic ripening parameters of fruits, the contents of soluble sugars, organic acids, and carotenoids were analyzed (in pulps) on the sixth day by high-performance liquid chromatography (HPLC). The results showed that LED and UV irradiation not only accelerated orange ripening but also caused significant changes in the soluble sugar, organic acid, and carotenoid content. Compared with fruit subjected to da

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Lease, Kevin A., and Chris Papageorgio. "Bioinformatic Prediction of Ultraviolet Light Mutagenesis Sensitivity of Human Genes and a Method for Genetically Engineering UVB Resistance." Cancer Informatics 10 (January 2011): CIN.S6670. http://dx.doi.org/10.4137/cin.s6670.

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Living on earth, we are exposed to ultraviolet (UV) light as part of the solar radiation. UVB spectrum light exposure contributes to the development of skin cancer by interacting with pyrimidine pairs to create lesions called cyclobutane pyrimidine dimers. If these lesions are not removed by nucleotide excision repair, they often give rise to C to T transition mutations. Based on these observations, a bioinformatics approach was used to predict the vulnerability of human protein coding genes to UVB induced loss of function mutations. This data was used to evaluate in depth those genes associat

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Bok, Michael J., Nicholas W. Roberts, and Thomas W. Cronin. "Behavioural evidence for polychromatic ultraviolet sensitivity in mantis shrimp." Proceedings of the Royal Society B: Biological Sciences 285, no. 1884 (August 2018): 20181384. http://dx.doi.org/10.1098/rspb.2018.1384.

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Stomatopod crustaceans are renowned for their elaborate visual systems. Their eyes contain a plethora of photoreceptors specialized for chromatic and polarization detection, including several that are sensitive to varying wavelength ranges and angles of polarization within the ultraviolet (UV) range (less than 400 nm). Behavioural experiments have previously suggested that UV photoreception plays a role in stomatopod communication, but these experiments have only manipulated the entire UV range. Here, using a behavioural approach, we examine UV vision in the stomatopod Haptosquilla trispinosa

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Epstein, John H. "The potential cutaneous effects of stratospheric ozone depletion." Environmental Reviews 4, no. 1 (January 1, 1996): 1–7. http://dx.doi.org/10.1139/a96-001.

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Recent evidence indicates that there has been a reduction in the stratospheric ozone over the northern hemisphere, as well as the Antarctic and Arctic latitudes. This has resulted in an increased penetration of ultraviolet B (UVB) at least as measured at Toronto, Canada, since 1989. If no precautions are observed by the human population, this could eventually result in an increase in the skin cancer incidence. This would be especially true for the most common cancers, that is, the nonmelanoma skin cancers (NMSCs), basal cell carcinomas and squamous cell carcinomas. In addition it has been pred

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Piao, Mei, Kyoung Kang, Ao Zhen, Hee Kang, Young Koh, Bong Kim, and Jin Hyun. "Horse Oil Mitigates Oxidative Damage to Human HaCaT Keratinocytes Caused by Ultraviolet B Irradiation." International Journal of Molecular Sciences 20, no. 6 (March 25, 2019): 1490. http://dx.doi.org/10.3390/ijms20061490.

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Horse oil products have been used in skin care for a long time in traditional medicine, but the biological effects of horse oil on the skin remain unclear. This study was conducted to evaluate the protective effect of horse oil on ultraviolet B (UVB)-induced oxidative stress in human HaCaT keratinocytes. Horse oil significantly reduced UVB-induced intracellular reactive oxygen species and intracellular oxidative damage to lipids, proteins, and DNA. Horse oil absorbed light in the UVB range of the electromagnetic spectrum and suppressed the generation of cyclobutane pyrimidine dimers, a photopr

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Zhu, Cailing, Jingjing Zhang, Zhiqiang Wang, and Hai Lin. "Excitability of high-energy ultraviolet radiation for Dy3+ in antimony phosphate glasses." Materials Science-Poland 35, no. 2 (July 26, 2017): 346–54. http://dx.doi.org/10.1515/msp-2017-0025.

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Abstract Dy3+ doped antimony phosphate (ZASP) glasses are synthesized and the specificity of the luminescence behavior is demonstrated. Different from the conventional long-wave ultraviolet (UVA) exciting cases, the excitable area of Dy3+ doped ZASP glasses is extended to high-energy ultraviolet radiation including medium-wave ultraviolet (UVB) and short-wave ultraviolet (UVC) spectral regions. The quantum efficiency for 4F9/2 level of Dy3+ in low- and medium-concentration Dy2O3 doping cases reaches 95.0 % and 66.7 %, respectively, confirming the emission effectiveness from Dy3+ in ZASP glasse

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Kim, Juewon, Jeongin Lee, and Hyunjung Choi. "Intense Pulsed Light Attenuates UV-Induced Hyperimmune Response and Pigmentation in Human Skin Cells." International Journal of Molecular Sciences 22, no. 6 (March 20, 2021): 3173. http://dx.doi.org/10.3390/ijms22063173.

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The skin of an organism is affected by various environmental factors and fights against aging stress via mechanical and biochemical responses. Photoaging induced by ultraviolet B (UVB) irradiation is common and is the most vital factor in the senescence phenotype of skin, and so, suppression of UVB stress-induced damage is critical. To lessen the UVB-induced hyperimmune response and hyperpigmentation, we investigated the ameliorative effects of intense pulsed light (IPL) treatment on the photoaged phenotype of skin cells. Normal human epidermal keratinocytes and human epidermal melanocytes wer

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Liu, Jingwei, Yanjie Liang, Shao Yan, Dongxun Chen, Shihai Miao, Weili Wang, and Jianqiang Bi. "Sunlight-activated long persistent luminescence in the ultraviolet-B spectral region from Bi3+-doped garnet phosphors for covert optical tagging." Journal of Materials Chemistry C 9, no. 30 (2021): 9692–701. http://dx.doi.org/10.1039/d1tc01922h.

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A series of Bi<sup>3+</sup>-doped garnet-based UVB persistent phosphors have been developed, which can be conveniently charged by either a standard 254 nm lamp or natural sunlight, producing persistent UVB light emission peaking at 313 nm.

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Hanker, J., B. Giammara, and G. Strauss. "Neutrophil Myeloperoxidase Destruction by Ultraviolet Irradiation." Proceedings, annual meeting, Electron Microscopy Society of America 46 (1988): 138–39. http://dx.doi.org/10.1017/s0424820100102778.

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Only a fraction of the UV radiation emitted by the sun reaches the earth; most of the UVB (290-320nm) is eliminated by stratospheric ozone. There is increasing concern, however, that man-made chemicals are damaging this ozone layer. Although the effects of UV on DNA or as a carcinogen are widely known, preleukemia and acute myeloid leukemia (AML) have only rarely been reported in psoriasis patients treated with 8-methoxypsoralen and UV (PUVA). It was therefore of interest to study the effects of UV on the myeloperoxidase (MP) activity of human neutrophils. The peroxidase activity of enriched l

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Toivonen, Peter M. A., Jared Stoochnoff, Kevin Usher, Changwen Lu, Paul A. Wiersma, and Chunhua Zhou. "Biochemical and Gene Expression Involved in Red Blush Color Development in ‘Ambrosia’ Apple." Journal of the American Society for Horticultural Science 144, no. 3 (May 2019): 164–71. http://dx.doi.org/10.21273/jashs04606-18.

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The market value of the apple (Malus ×domestica Borkh.) cultivar Ambrosia is closely linked to the characteristic blush on the skin surface. For ‘Ambrosia’ orchards that produce consistently low levels of surface blush, the implementation of reflective rowcovering has improved surface coloration, but the reflected wavebands responsible for this enhanced color production have not been confirmed. This study consisted of two separate experiments: one conducted in the field to confirm reflective rowcovering efficacy and the other in a controlled environment cabinet to determine which waveband was

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Oh, Seung-Taek, Dae-Hwan Park, and Jae-Hyun Lim. "Designing Safe General LED Lighting that Provides the UVB Benefits of Sunlight." Applied Sciences 9, no. 5 (February 26, 2019): 826. http://dx.doi.org/10.3390/app9050826.

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The ultraviolet (UV) rays emitted from sunlight greatly influence human health. Excessive exposure to UV rays can be harmful to eyes and skin; however, limited UVB exposure is essential for the synthesis of vitamin D. Nowadays, owing to insufficient exposure to natural light, there is increasing concerns about low vitamin D amongst individuals. To address this issue, many lighting devices that provide UVB doses have been released; however, such devices are only used for treatments or for special purposes. This study proposes a general indoor lighting system with a UVB LED light source to provi

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Gloor, M., and A. Scherotzke. "Age dependence of ultraviolet light-induced erythema following narrow-band UVB exposure." Photodermatology, Photoimmunology & Photomedicine 18, no. 3 (June 2002): 121–26. http://dx.doi.org/10.1034/j.1600-0781.2002.00756.x.

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Maini, Sabia, Brian M. Fahlman, and Ed S. Krol. "Flavonols Protect Against UV Radiation-Induced Thymine Dimer Formation in an Artificial Skin Mimic." Journal of Pharmacy & Pharmaceutical Sciences 18, no. 4 (October 25, 2015): 600. http://dx.doi.org/10.18433/j34w39.

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Purpose: Exposure of skin to ultraviolet light has been shown to have a number of deleterious effects including photoaging, photoimmunosuppression and photoinduced DNA damage which can lead to the development of skin cancer. In this paper we present a study on the ability of three flavonols to protect EpiDerm™, an artificial skin mimic, against UV-induced damage. Methods: EpiDerm™ samples were treated with flavonol in acetone and exposed to UVA (100 kJ/m2 at 365 nm) and UVB (9000 J/m2 at 310 nm) radiation. Secretion of matrix metalloproteinase-1 (MMP-1) and tumor necrosis factor-α (TNF-a) were

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Keshari, Sunita, Arun Balasubramaniam, Binderiya Myagmardoloonjin, Deron Raymond Herr, Indira Putri Negari, and Chun-Ming Huang. "Butyric Acid from Probiotic Staphylococcus epidermidis in the Skin Microbiome Down-Regulates the Ultraviolet-Induced Pro-Inflammatory IL-6 Cytokine via Short-Chain Fatty Acid Receptor." International Journal of Molecular Sciences 20, no. 18 (September 11, 2019): 4477. http://dx.doi.org/10.3390/ijms20184477.

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The glycerol fermentation of probiotic Staphylococcus epidermidis (S. epidermidis) in the skin microbiome produced butyric acid in vitro at concentrations in the millimolar range. The exposure of dorsal skin of mice to ultraviolet B (UVB) light provoked a significant increased production of pro-inflammatory interleukin (IL)-6 cytokine. Topical application of butyric acid alone or S. epidermidis with glycerol remarkably ameliorated the UVB-induced IL-6 production. In vivo knockdown of short-chain fatty acid receptor 2 (FFAR2) in mouse skin considerably blocked the probiotic effect of S. epiderm

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Han, Hee-Soo, Ji-Sun Shin, Da-Bin Myung, Hye Ahn, Sun Lee, Hyoung Kim, and Kyung-Tae Lee. "Hydrangea serrata (Thunb.) Ser. Extract Attenuate UVB-Induced Photoaging through MAPK/AP-1 Inactivation in Human Skin Fibroblasts and Hairless Mice." Nutrients 11, no. 3 (March 1, 2019): 533. http://dx.doi.org/10.3390/nu11030533.

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Skin photoaging is mainly caused by exposure to ultraviolet (UV) light, which increases expressions of matrix metalloproteinases (MMPs) and destroys collagen fibers, consequently inducing wrinkle formation. Nutritional factors have received scientific attention for use as agents for normal skin functions. The aim of this study was to investigate the effect of hot water extracts from the leaves of Hydrangea serrata (Thunb.) Ser. (WHS) against ultraviolet B (UVB)-induced skin photoaging and to elucidate the underlying molecular mechanisms in human foreskin fibroblasts (Hs68) and HR-1 hairless mi

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Batchelor, Jonathan M., Adam Millington, Kim S. Thomas, Perways Akram, Jaskiran Azad, Anthony Bewley, Joanne R. Chalmers, et al. "Home-based narrowband UVB, topical corticosteroid or combination for children and adults with vitiligo: HI-Light Vitiligo three-arm RCT." Health Technology Assessment 24, no. 64 (November 2020): 1–128. http://dx.doi.org/10.3310/hta24640.

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Background Systematic reviews suggest that narrowband ultraviolet B light combined with treatments such as topical corticosteroids may be more effective than monotherapy for vitiligo. Objective To explore the clinical effectiveness and cost-effectiveness of topical corticosteroid monotherapy compared with (1) hand-held narrowband ultraviolet B light monotherapy and (2) hand-held narrowband ultraviolet B light/topical corticosteroid combination treatment for localised vitiligo. Design Pragmatic, three-arm, randomised controlled trial with 9 months of treatment and a 12-month follow-up. Setting

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Guo, Linhao, Zelin Hu, Rongqiao Wan, Linyun Long, Tao Li, Jianchang Yan, Yun Lin, Lei Zhang, Wenhui Zhu, and Liancheng Wang. "Design of aluminum nitride metalens for broadband ultraviolet incidence routing." Nanophotonics 8, no. 1 (December 4, 2018): 171–80. http://dx.doi.org/10.1515/nanoph-2018-0151.

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AbstractUltraviolet (UV) photonics-based device and equipment have various applications in sterilization, military covert communication, medical treatment, nanofabrication, gem identification and so on. The traditional constituent UV components are bulky, inefficient, expensive and easily aging under UV radiation. An all-dielectric metasurface offers a promising way to control the amplitude, polarization and phase of light by engineering the size, shape and distribution of its constituent elements. However, UV components based on all-dielectric metasurfaces are difficult to be realized, due to

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Sydney, Thomas, Jo-Ann Marshall-Thompson, Rahul Kapoore, Seetharaman Vaidyanathan, Jagroop Pandhal, and J. Fairclough. "The Effect of High-Intensity Ultraviolet Light to Elicit Microalgal Cell Lysis and Enhance Lipid Extraction." Metabolites 8, no. 4 (October 15, 2018): 65. http://dx.doi.org/10.3390/metabo8040065.

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Currently, the energy required to produce biofuel from algae is 1.38 times the energy available from the fuel. Current methods do not deliver scalable, commercially viable cell wall disruption, which creates a bottleneck on downstream processing. This is primarily due to the methods depositing energy within the water as opposed to within the algae. This study investigates ultraviolet B (UVB) as a disruption method for the green algae Chlamydomonas reinhardtii, Dunaliella salina and Micractinium inermum to enhance solvent lipid extraction. After 232 seconds of UVB exposure at 1.5 W/cm2, culture

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Hiriart, Véronique P., Bruce M. Greenberg, Stephanie J. Guildford, and Ralph EH Smith. "Effects of ultraviolet radiation on rates and size distribution of primary production by Lake Erie phytoplankton." Canadian Journal of Fisheries and Aquatic Sciences 59, no. 2 (February 1, 2002): 317–28. http://dx.doi.org/10.1139/f01-212.

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The impact of natural solar ultraviolet radiation (UVR), particularly UVB (297320 nm), on phytoplankton primary production in Lake Erie was investigated during the spring and summer of 1997. Radiocarbon incorporation and size-selective filtration was used to trace total production and its distribution among particulate and dissolved pools. On average, 1-h exposures produced half the UVB-dependent inhibition of total production realized in 8-h exposures, indicating rapid kinetics of photoinhibition. Cumulative UVB-dependent photoinhibition averaged 36% in 8-h simulated surface exposures. The e

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Wu, Shulian, Zheng Huang, Yunxia Wang, and Hui Li. "Characterizing UVB-induced skin tumor process using optical coherence tomography." Journal of Innovative Optical Health Sciences 09, no. 05 (July 18, 2016): 1650014. http://dx.doi.org/10.1142/s1793545816500140.

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The incidence of nonmelanoma skin cancer is rising worldwide. The major carcinogenic factor for most skin cancers is solar ultraviolet light, in particular, the chronic exposure to UVB (280–320[Formula: see text]nm). In this study, the optical characteristics of skin canceration process induced by UVB were analyzed. Optical coherence tomography (OCT) was used for monitoring the morphologic changes and compared with histological analysis. Meanwhile, the optical property, such as the attenuation coefficient ([Formula: see text]t) was systematically extracted and analyzed. In addition, characteri

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Kobayashi, Mao, Shokoku Shu, Kana Marunaka, Toshiyuki Matsunaga, and Akira Ikari. "Weak Ultraviolet B Enhances the Mislocalization of Claudin-1 Mediated by Nitric Oxide and Peroxynitrite Production in Human Keratinocyte-Derived HaCaT Cells." International Journal of Molecular Sciences 21, no. 19 (September 27, 2020): 7138. http://dx.doi.org/10.3390/ijms21197138.

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A tight junction (TJ) makes a physical barrier in the epidermal cells of skin. Ultraviolet (UV) light may disrupt the TJ barrier, but the mechanism has not been well clarified. Weak UVB (5 mJ/cm2) caused mislocalization of claudin-1 (CLDN1), a component of the TJ strand, and disruption of TJ barrier in human keratinocyte-derived HaCaT cells. The UVB-induced mislocalization of CLDN1 was inhibited by monodansylcadaverine (MDC), a clathrin-dependent endocytosis inhibitor, suggesting that UVB enhances the internalization of CLDN1. Transepidermal electrical resistance and paracellular flux of lucif

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Sugianto, Monita, Achadiyani Achadiyani, and Gaga Irawan Nugraha. "Antioxidant Effects of Red Fruit Oil on MMP-1 Gene Expression and Malondialdehyde Levels on Skin Exposed to UVB Rays." Molecular and Cellular Biomedical Sciences 3, no. 2 (September 1, 2019): 100. http://dx.doi.org/10.21705/mcbs.v3i2.68.

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Background: Chronic exposure ultraviolet (UV)-B radiation causes reactive oxygen species (ROS) formation. Furthermore, ROS will induce the formation of malondialdehyde and increase matrix metalloproteinase (MMP)-1 expression. One strategy against the free radicals effects is by consuming antioxidants. This study aims to analyze the antioxidants effect of red fruit oil (RFO) on MMP-1 expression and malondialdehyde levels due to exposure to UVB rays.Materials and Methods: Thirty male Wistar rats were divided into 5 groups. The P0 group was not given treatment, the P1 group was only exposed to UV

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Bosman, E. S., A. Y. Albert, J. P. Dutz, and B. Vallance. "A12 SKIN EXPOSURE TO NARROW BAND UVB LIGHT MODULATES THE HUMAN INTESTINAL MICROBIOME." Journal of the Canadian Association of Gastroenterology 3, Supplement_1 (February 2020): 15–16. http://dx.doi.org/10.1093/jcag/gwz047.011.

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Abstract Background The recent worldwide rise in idiopathic immune and inflammatory diseases such as multiple sclerosis and inflammatory bowel diseases has been linked to Western society-based changes in lifestyle and environment. These include decreased exposure to sunlight/UVB light and subsequent impairment in the production of vitamin D, as well as dysbiotic changes in the makeup of the gut microbiome. Despite their association, it is unclear if there are any direct links between UVB light and the gut microbiome. Aims In this study we investigated whether exposing the skin to Narrow Band U

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