keyword
https://read.qxmd.com/read/38497507/white-light-emitting-zno-dy-3-nanophosphors-delving-into-the-spectroscopic-parameters-via-judd-ofelt-analysis
#1
JOURNAL ARTICLE
Rajendran Raji, Gopalakrishnan Jyothi, Sajesh Sasidharan, Kunnel Gopalan Gopchandran
Developing a single-phase white emitting nanophosphor with high quantum efficiency has become a hotspot for scientific world. Herein, single-phase white-light emitting Zn1- x O: x Dy3+ nanophosphors have been synthesized via a sonochemical method. X-ray diffraction analysis and Raman spectroscopy-based investigations confirmed the hexagonal wurtzite phase for Zn1- x O: x Dy3+ nanophosphors with preferential growth along the (101) plane. Scanning electron microscopy images showed the formation of a ribbon-shaped morphology with a diameter of ∼25 nm...
March 18, 2024: Dalton Transactions: An International Journal of Inorganic Chemistry
https://read.qxmd.com/read/38496885/high-altitude-balloon-platform-for-studying-the-biological-response-of-living-organisms-exposed-to-near-space-environments
#2
JOURNAL ARTICLE
Sumeth Klomchitcharoen, Pongsakorn Wechakarn, Tanchanok Tangwattanasirikun, Noparin Smerwong, Phubase Netrapathompornkij, Thanapat Chatmeeboon, Norawit Nangsue, Vivatsathorn Thitasirivit, Krin Kaweewongsunthorn, Suvijak Piyanopharoj, Phachara Phumiprathet, Yodchanan Wongsawat
The intangible desire to explore the mysteries of the universe has driven numerous advancements for humanity for centuries. Extraterrestrial journeys are becoming more realistic as a result of human curiosity and endeavors. Over the years, space biology research has played a significant role in understanding the hazardous effects of the space environment on human health during long-term space travel. The inevitable consequence of a space voyage is space ionizing radiation, which has deadly aftereffects on the human body...
March 30, 2024: Heliyon
https://read.qxmd.com/read/38496529/a-prospective-cohort-study-exploring-the-joint-influence-of-sunlight-exposure-and-tanning-bed-use-on-basal-cell-carcinoma-squamous-cell-carcinoma-and-melanoma-risk
#3
Megan M Tran, Elisabeth A George-Washburn, Jongeun Rhee, Wen-Qing Li, Abrar Qureshi, Eunyoung Cho
Exposure to solar ultraviolet (UV) radiation and use of UV-emitting tanning devices are known risk factors for skin cancer. Few studies have explored the interaction between these risk factors, namely how the risk of skin cancer increases among those who both have been exposed to high levels of natural sunlight and regularly use tanning beds. Nurses' Health Study II followed 116,430 women, aged 25-42, from 1991 to 2011. Cumulative average UV exposure was based on participants' residences at follow-up periods...
March 6, 2024: Research Square
https://read.qxmd.com/read/38495369/impact-of-ultraviolet-b-radiation-on-early-season-morpho-physiological-traits-of-indica-and-japonica-rice-genotypes
#4
JOURNAL ARTICLE
Sonal Mathur, Raju Bheemanahalli, Salah Hameed Jumaa, Naqeebullah Kakar, Vangimalla R Reddy, Wei Gao, Kambham Raja Reddy
Ultraviolet (UV)-B radiation is considered one of the major detrimental rays coming from the Sun. UV-B radiation has a harmful impact on plant growth and development. The effect of UV-B radiation was studied on 64 rice ( Oryza sativa L.) genotypes during the vegetative season. An equal number of genotypes from the japonica (50%) and indica (50%) subspecies were phenotyped using the Soil-Plant-Atmosphere-Research (SPAR) units. The 10 kJ UV-B was imposed 12 days after planting (DAP) and continued for three weeks (21 d)...
2024: Frontiers in Plant Science
https://read.qxmd.com/read/38494852/black-ceiling-tiles-reduce-occupational-uv-exposure-for-staff-in-clinical-area-containing-phototherapy-cabinets
#5
JOURNAL ARTICLE
David Bajek, Katherine Sharpe, Ewan Eadie
Phototherapy clinics administer UV light to patients via phototherapy cabinets. The UV radiation from these cabinets reflects on the white ceiling tiles of the clinic and is directed towards both staff and patients in the area. This is particularly problematic for clinical technologists who must undertake dosimetry in these areas and have a particular time (often as low as 30 minutes) before they reach their maximum exposure limit. By replacing the white tiles with black alternatives which absorb the stray radiation, we have been able to reduce these reflections by almost 90%, prolonging the time to maximum exposure by nearly 10 times...
March 18, 2024: Clinical and Experimental Dermatology
https://read.qxmd.com/read/38493564/the-impact-of-the-broad-range-of-gamma-doses-on-follow-up-fission-fragment-track-parameters-in-cr-39-radiation-detector
#6
JOURNAL ARTICLE
S M Othman, I A El-Mesady, A S El-Badawy, E H Ghanim
In this study, the effect of high γ-doses on the track parameters, structure as well as optical properties of pristine and γ-irradiation CR-39 nuclear track detector (NTD) were investigated. CR-39 detectors were exposed to γ-doses from 50 up to 500 kGy and then irradiated by fission ions (F.F) of fluence from 252 CF source. The track diameter (D), bulk etch rate (VB ), etch induction time (EIT), cut-off or saturated time (tcut-off ) for saturated diameters and projected track length (Lo ) of normally and inclined incident fission tracks were estimated for different removal layers (h)...
February 28, 2024: Applied Radiation and Isotopes
https://read.qxmd.com/read/38493511/photochemical-modification-of-tea-waste-by-tungsten-oxide-nanoparticle-as-a-novel-low-cost-and-green-photocatalyst-for-degradation-of-dye-pollutant
#7
JOURNAL ARTICLE
Ehsan Hemmatzadeh, Morteza Bahram, Reza Dadashi
So far, many adsorbents and nanocomposites have been synthesized by different methods and used to remove or degradation of dye pollutants. Nowadays, the use of natural adsorbents and their modification with simple methods based on metal oxides are of interest to many researchers. In this study, for the first time, we report the simple and low-cost modification of tea pomace waste (TPW) with tungsten oxide (WO3 ) based on the photochemical method as a green, cost-effective, and biodegradable photocatalyst for the degradation of Rh B dye pollutant...
March 3, 2024: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://read.qxmd.com/read/38490153/dose-dependent-physiological-effects-of-uv-c-radiation-on-seashore-paspalum
#8
JOURNAL ARTICLE
Qianqian Fan, Paul L Raymer, Bochra Amina Bahri, David Jespersen
Positive effects of ultraviolet-C (UV-C) radiation on plants have been documented in previous literature with a focus on extending shelf life and reducing disease development. However, its effect on plant growth habits has been scarcely explored, especially in turfgrass where a compact shoot growth is a desirable trait. Seashore paspalum (Paspalum vaginatum) is a warm-season perennial turfgrass requiring low fertilizer and pesticide inputs. This project aimed to test the effects of different doses of UV-C radiation on growth and performance of seashore paspalum cv...
March 11, 2024: Plant Physiology and Biochemistry: PPB
https://read.qxmd.com/read/38487263/evaluation-of-the-photoprotective-and-antioxidant-potential-of-an-avobenzone-derivative
#9
JOURNAL ARTICLE
Ana Júlia Pasuch Gluzezak, Jean Leandro Dos Santos, Silvya Stuchi Maria-Engler, Lorena Rigo Gaspar
Solar radiation can cause damage to the skin, and the use of sunscreens is one of the main protective measures. However, photounstable ultraviolet (UV) filters can generate photoproducts and reactive oxygen species (ROS). Adding antioxidants, such as resveratrol, to enhance the action of UV filters in sunscreens is an interesting strategy for reducing the damage caused by UV radiation exposure. However, new compounds must have their stability, safety and efficacy guaranteed. Avobenzone, a commonly used UV filter, stands out as a promising candidate for structural modification to enhance its stability...
2024: Frontiers in Physiology
https://read.qxmd.com/read/38479564/phototoxicity-in-vitro-and-safety-in-vivo-of-the-emulsion-photosensitizer-based-on-furanocoumarins-of-heracleum-sosnowskyi
#10
JOURNAL ARTICLE
Oleg A Kulikov, Vasilisa I Shlyapkina, Ekaterina P Brodovskaya, Amina M Al-Khadj Aioub, Valentin P Ageev, Mikhail N Zharkov, Denis E Yakobson, Daniil S Sokushev, Nikolay A Pyataev, Gleb B Sukhorukov
The use of plants such as giant hogweed as raw materials for the manufacture of dosage forms has been little explored. In this study, we utilized furanocoumarins from the Heracleum sosnowskyi plant to create an experimental emulsion dosage form (EmFHS). The EmFHS was finely dispersed (481.8 nm ± 71.1 nm), shelf-stable, and contained predominantly 8-methoxypsoralen at a concentration of 1 mg/ml. Phototoxicity analysis of EmFHS for THP-1 cells under UV (365 nm) irradiation showed an IC50 of 19...
March 11, 2024: European Journal of Pharmaceutics and Biopharmaceutics
https://read.qxmd.com/read/38475503/urban-flora-riches-unraveling-metabolic-variation-along-altitudinal-gradients-in-two-spontaneous-plant-species
#11
JOURNAL ARTICLE
Elena Daniela Mogîldea, Monica Elena Mitoi, Claudia Biță-Nicolae, Dumitru Murariu
Using resilient, self-sustaining plants in urban green spaces enhances environmental and cultural benefits and reduces management costs. We assessed two spontaneous plant species, Linaria vulgaris Mill. and Cichorium intybus L., in four sites from the surrounding urban areas, ranging in altitude from 78 to 1040 m. Protection against UV-B radiation is crucial for plants at higher altitudes, guiding our focus on UV-visible absorption spectra, fluorometric emission spectra, secondary metabolite accumulation, and pigment dynamics in leaves...
February 27, 2024: Plants (Basel, Switzerland)
https://read.qxmd.com/read/38475464/therapeutic-application-of-dendrobium-fimbriatum-hook-for-retinopathy-caused-by-ultraviolet-radiation-and-chemotherapy-using-arpe-19-cells-and-mouse-retina
#12
JOURNAL ARTICLE
Chi-Feng Cheng, Sheue-Er Wang, Chen-Wen Lu, Thi Kim Ngan Nguyen, Szu-Chuan Shen, Chia-Ying Lien, Wu-Chang Chuang, Ming-Chung Lee, Chung-Hsin Wu
Retinopathy caused by ultraviolet radiation and cancer chemotherapy has increased dramatically in humans due to rapid environmental and social changes. Therefore, it is very important to develop therapeutic strategies to effectively alleviate retinopathy. In China, people often choose dendrobium to improve their eyesight. In this study, we explored how Dendrobium fimbriatum extract (DFE) protects ARPE-19 cells and mouse retinal tissue from damage of ultraviolet (UV) radiation and chemotherapy. We evaluated the antioxidant capacity of DFE using the 1,1-diphenyl-2-trinitophenylhydrazine (DPPH) assay...
February 23, 2024: Plants (Basel, Switzerland)
https://read.qxmd.com/read/38475374/the-aging-of-polymers-under-electromagnetic-radiation
#13
REVIEW
Chrysanthos Maraveas, Ioannis Vasileios Kyrtopoulos, Konstantinos G Arvanitis, Thomas Bartzanas
Polymeric materials degrade as they react with environmental conditions such as temperature, light, and humidity. Electromagnetic radiation from the Sun's ultraviolet rays weakens the mechanical properties of polymers, causing them to degrade. This study examined the phenomenon of polymer aging due to exposure to ultraviolet radiation. The study examined three specific objectives, including the key theories explaining ultraviolet (UV) radiation's impact on polymer decomposition, the underlying testing procedures for determining the aging properties of polymeric materials, and appraising the current technical methods for enhancing the UV resistance of polymers...
March 3, 2024: Polymers
https://read.qxmd.com/read/38475071/quantification-of-uv-light-induced-spectral-response-degradation-of-cmos-based-photodetectors
#14
JOURNAL ARTICLE
Pablo F Siles, Daniel Gäbler
High-energy radiation is known to potentially impact the optical performance of silicon-based sensors adversely. Nevertheless, a proper characterization and quantification of possible spectral response degradation effects due to UV stress is technically challenging. On one hand, typical illumination methods via UV lamps provide a poorly defined energy spectrum. On the other hand, a standardized measurement methodology is also missing. This work provides an approach where well-defined energy spectrum UV stress conditions are guaranteed via a customized optical set up, including a laser driven light source, a monochromator, and a non-solarizing optical fiber...
February 27, 2024: Sensors
https://read.qxmd.com/read/38475057/ultra-broadband-ultraviolet-visible-light-short-wavelength-infrared-ingaas-focal-plane-arrays-via-n-inp-contact-layer-removal
#15
JOURNAL ARTICLE
Jiaxin Zhang, Wei Wang, Haifeng Ye, Runyu Huang, Chen Liu, Weilin Zhao, Yanli Shi
PIN InGaAs short wavelength infrared (SWIR) focal plane array (FPA) detectors have attracted extensive attention due to their high detectivity, high quantum efficiency, room temperature operation, low dark current, and good radiation resistance. Furthermore, InGaAs FPA detectors have wide applications in many fields, such as aviation safety, biomedicine, camouflage recognition, and infrared night vision. Recently, extensive research has been conducted on the extension of the response spectrum from short wavelength infrared (SWIR) to visible light (VIS) through InP substrate removal and reserving the n-InP contact layer...
February 26, 2024: Sensors
https://read.qxmd.com/read/38473996/integrated-physiologic-and-proteomic-analyses-reveal-the-molecular-mechanism-of-navicula-sp-in-response-to-ultraviolet-irradiation-stress
#16
JOURNAL ARTICLE
Siyu Gong, Pan Pan, Xiangying Meng, Yuxin Zhang, Hanli Xu, Honggang Hu, Xiyu Cheng, Qiong Yan
With the continuous development of space station construction, space ecosystem research has attracted increasing attention. However, the complicated responses of different candidate plants and algae to radiation stress remain unclear. The present study, using integrated physiologic and proteomic analyses, was carried out to reveal the molecular mechanism of Navicula sp. in response to ultraviolet (UV) irradiation stress. Under 12~24 h of high-dose UV irradiation conditions, the contents of chlorophyll and soluble proteins in Navicula sp...
February 27, 2024: International Journal of Molecular Sciences
https://read.qxmd.com/read/38469735/comparative-transcriptomic-analysis-reveals-differences-in-gene-expression-and-regulatory-pathways-between-nonacral-and-acral-melanoma-in-asian-individuals
#17
JOURNAL ARTICLE
Yu-Jen Chiu, Cheng-Yuan Li, Tien-Hsiang Wang, Hsu Ma, Teh-Ying Chou
Melanoma predominantly occurs in White individuals, which is associated with factors such as exposure to UV radiation and skin pigmentation. Despite its low incidence, melanoma is the primary cause of skin cancer-related death in Asia, typically in areas with low sun exposure. In our previous whole-exome sequencing study, we identified mutational signature 12 as the most prevalent variant in Asian patients, differing from the common UV-associated mutational signature 7 observed in White individuals. We also observed major differences between acral melanoma (AM) and nonacral melanoma (NAM) in terms of signatures 7, 21, and 22...
March 12, 2024: Journal of Dermatology
https://read.qxmd.com/read/38461969/efficacy-of-233-nm-led-far-uv-c-radiation-against-clinically-relevant-bacterial-strains-in-the-phase-2-step-2-in-vitro-test-on-basis-of-en-14561-and-on-an-epidermis-cell-model
#18
JOURNAL ARTICLE
Claudia Sicher, Nevin Opitz, Pia Elen Becker, Neysha Lobo Ploch, Johannes Schleusener, Michael Kneissl, Axel Kramer, Paula Zwicker
INTRODUCTION: Healthcare-acquired infections and overuse of antibiotics are a common problem. Rising emergence of antibiotic and antiseptic resistances requires new methods of microbial decontamination or decolonization as the use of far-UV-C radiation. METHODS: The microbicidal efficacy of UV-C radiation (222 nm, 233 nm, 254 nm) was determined in a quantitative carrier test and on a 3D-epidermis model against Staphylococcus (S.) aureus, S. epidermidis, S. haemolyticus, S...
March 8, 2024: Microbes and Infection
https://read.qxmd.com/read/38461001/effect-of-novel-and-conventional-food-processing-technologies-on-bacillus-cereus-spores
#19
JOURNAL ARTICLE
Aswathi Soni, Gale Brightwell
This chapter provides a summary of the effect of thermal and non-thermal processing technologies on Bacillus cereus spores, a well-known pathogenic bacterium associated with foodborne illnesses. B. cereus has been frequently detected in rice, milk products, infant food, liquid eggs products and meat products all over the world. This Gram positive, rod-shaped, facultative anaerobe can produce endospores that can withstand pasteurization, UV radiation, and chemical reagents commonly used for sanitization. B. cereus spores can germinate into vegetative cells that can produce toxins...
2024: Advances in Food and Nutrition Research
https://read.qxmd.com/read/38460430/narrow-band-uvb-radiation-triggers-diverse-changes-in-the-gene-expression-and-induces-the-accumulation-of-m1-macrophages-in-human-skin
#20
JOURNAL ARTICLE
Piia Karisola, Veera Nikkola, Heli Joronen, Lasse Ylianttila, Mari Grönroos, Timo Partonen, Erna Snellman, Harri Alenius
BACKGROUND: The underlying molecular mechanisms that determine the biological effects of UVB radiation exposure on human skin are still only partially comprehended. OBJECTIVES: Our goal is to examine the human skin transcriptome and related molecular mechanisms following a single exposure to UVB in the morning versus evening. METHODS: We exposed 20 volunteer females to four-fold standard erythema doses (SED4) of narrow-band UVB (309-313 nm) in the morning or evening and studied skin transcriptome 24 h after the exposure...
March 6, 2024: Journal of Photochemistry and Photobiology. B, Biology
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