keyword
https://read.qxmd.com/read/38452150/comparison-of-nutritional-diversity-in-five-fresh-legumes-using-flavonoids-metabolomics-and-postharvest-botrytis-cinerea-defense-analysis-of-peas-mediated-by-sakuranetin
#21
JOURNAL ARTICLE
Yao Zhao, Xueying Zhang, Zhuoliang Lang, Chi Zhang, Linying Li, Yuqing He, Na Liu, Ying Zhu, Gaojie Hong
Legumes possess several bioactive nutrients, including flavonoids, and the study of the flavonoid profile of legumes is of great significance to human health. Using widely targeted metabolomics, we revealed the flavonoid profiles of five popular fresh legumes: cowpea, soybean, pea, fava bean, and kidney bean. A total of 259 flavonoids were identified, and the flavonoid accumulation patterns of the five legumes were remarkably different. In addition to analyzing common and species-specific flavonoids in the five legumes, we also generalized representative flavonoids of various subclasses...
March 7, 2024: Journal of Agricultural and Food Chemistry
https://read.qxmd.com/read/38451047/european-consensus-based-interdisciplinary-guideline-for-diagnosis-treatment-and-prevention-of-actinic-keratoses-epithelial-uv-induced-dysplasia-and-field-cancerization-on-behalf-of-european-association-of-dermato-oncology-european-dermatology-forum-european
#22
JOURNAL ARTICLE
Lidija Kandolf, Ketty Peris, Josep Malvehy, Klara Mosterd, Markus V Heppt, Maria Concetta Fargnoli, Carola Berking, Petr Arenberger, Matilda Bylaite-Bučinskiene, Veronique Del Marmol, Thomas Dirschka, Brigitte Dreno, Ana-Maria Forsea, Catherine A Harwood, Axel Hauschild, Ida Marie Heerfordt, Roland Kauffman, Nicole Kelleners Smeeths, Aimilios Lallas, Celeste Lebbe, Ulrike Leiter, Caterina Longo, Željko Mijušković, Giovanni Pellacani, Susana Puig, Philippe Saiag, Mirna Šitum, Eggert Stockfleth, Carmen Salavastru, Alexander Stratigos, Iris Zalaudek, Claus Garbe
A collaboration of multidisciplinary experts from the European Association of Dermato-Oncology, the European Dermatology Forum, the European Academy of Dermatology and Venereology, and the European Union of Medical Specialists was formed to develop European recommendations on AK diagnosis and treatment, based on current literature and expert consensus. This guideline addresses the epidemiology, diagnostics, risk stratification and treatments in immunocompetent as well as immunosuppressed patients. Actinic keratoses (AK) are potential precursors of cutaneous squamous cell carcinoma (cSCC) and display typical histopathologic and immunohistochemical features of this malignancy in an early stage...
March 7, 2024: Journal of the European Academy of Dermatology and Venereology: JEADV
https://read.qxmd.com/read/38450604/follow-up-study-of-trans-c-to-cis-c-thermally-or-photochemically-induced-isomerization-of-terpyridine-adducts-of-cycloruthenated-2-aryl-2-pyridine-compounds
#23
JOURNAL ARTICLE
Moussa Ali, Yann Cornaton, Jean-Pierre Djukic, Michel Pfeffer
The mechanism of isomerization of the known 2-phenyl,pyridine ( phpy ) derivatives [Ru( phpy -κC,N) (MeCN -trans- N)( terpy )]PF6 , 2 , to [Ru( phpy -κC,N)(MeCN -trans- C)( terpy )]PF6 ( terpy = 2,2';6',2″-terpyridine), 3 , at temperatures >50 °C has been investigated both by 1 H NMR spectroscopy and by DFT calculations. The photoisomerization of 2 to 3 by UV light occurred also quantitatively in MeCN after 20 h at room temperature. A similar behavior to that of 2 could be established for the related compound [Ru(3-acridine-2'-C5 H4 N-κC,N)(MeCN -trans- N)(2,2';6',2″-terpyridine)]PF6 , 6 (acridine = dibenzo[ b , e ]pyridine or 2,3-benzoquinoline), that was obtained from the reaction between [Ru(3-acridine-2'-C5 H4 N-κC,N) (MeCN)4 ]PF6 , 4 , and terpy in MeOH/MeCN at 60 °C for 24 h...
March 7, 2024: Inorganic Chemistry
https://read.qxmd.com/read/38445720/photoprotective-effect-of-topical-treatment-with-lopezia-racemosa-extract-against-deleterious-uvb-irradiation-effects-in-the-skin-of-hairless-mice
#24
JOURNAL ARTICLE
Nolasco Ontiveros Erick, Espinosa González Adriana Montserrat, Estrella Parra Edgar Antonio, Serrano Parrales Rocío, López Urrutia Eduardo, García Castillo Verónica, Rodríguez-Sosa Miriam, Juárez-Avelar Imelda, Benítez Flores José Del Carmen, Rivera Cabrera José Cruz, Hernández Delgado Claudia Tzasna, García Bores Ana María, Avila Acevedo José Guillermo
Lopezia racemosa is known as a "mosquito flower or perlilla." It is commonly found in corn crops. In traditional Mexican medicine, this plant is used to treat stomach cancer and urinary tract infections. Likewise, compounds and extracts isolated from plants have shown cytotoxic and anti-inflammatory effects. The objective of this study was to evaluate the photochemoprotective effect of topical treatment with the methanolic extract of L. racemosa (MELR) as a photochemoprotective agent against the harmful effects of UV irradiation (UVR) on a bacterial model and hairless mice...
March 6, 2024: Photochemistry and Photobiology
https://read.qxmd.com/read/38442644/physical-structural-and-nuclear-radiation-shielding-behavior-of-ni-cu-zn-fe2o4-ferrite-nanoparticles
#25
JOURNAL ARTICLE
Kalidas B Gaikwad, Ketan P Gattu, Chaitali V More, Pravina P Pawar
In this study, Ni-Cu-Zn Fe2 O4 ferrite nanoparticles have successfully been synthesized utilizing the Co-precipitation technique. The primary objectives encompassed elucidating phase purity, discerning functional groups, scrutinizing surface morphology, and conducting structural analyses. To accomplish these objectives, a battery of advanced characterization techniques was employed, including power X-ray diffraction, Transmission infrared spectroscopy, UV-Visible spectrophotometer, and Scanning electron microscopy...
February 28, 2024: Applied Radiation and Isotopes
https://read.qxmd.com/read/38441875/influence-of-fuel-properties-on-the-light-absorption-of-fresh-and-laboratory-aged-atmospheric-brown-carbon-produced-from-realistic-combustion-of-boreal-peat-and-spruce-foliage
#26
JOURNAL ARTICLE
Ming Lyu, Cora J Young, Dan K Thompson, Sarah A Styler
Climate change has exacerbated fire activity in the boreal region. Consequently, smoldering boreal peatland fires are an increasingly important source of light-absorbing atmospheric organic carbon ("brown carbon"; BrC). To date, however, BrC from this source remains largely unstudied, which limits our ability to predict its climate impact. Here, we use size-exclusion chromatography coupled with diode array UV-vis detection to examine the molecular-size-dependent light absorption properties of fresh and photoaged aqueous BrC extracts collected during laboratory combustion of boreal peat and live spruce foliage...
March 5, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38439258/study-of-ultraviolet-light-emitting-diodes-with-ingan-quantum-dots-and-lattice-matched-superlattice-electron-blocking-layers
#27
JOURNAL ARTICLE
Aoxiang Zhang, Jiayi Yao, Yipu Qu, Fang Wang, Juin J Liou, Yuhuai Liu
Ultraviolet light emitting diodes (UV-LEDs) face the challenges including insufficient hole injection and severe electron leakage. Quantum dots (QDs) have been proven to provide three-dimensionally localized states for carriers, thereby enhancing carrier confinement. Therefore, UV-LEDs employing InGaN QDs are designed and studied in this paper. The APSYs software is used to simulate UV-LEDs. Simulation results indicate that the QDs effectively improve the electron and hole concentration in the active region...
February 12, 2024: Optics Express
https://read.qxmd.com/read/38439238/frequency-tripled-semiconductor-disk-laser-with-over-0-5-w-ultraviolet-output-power
#28
JOURNAL ARTICLE
Peng Zhang, Jia Cheng, Yadong Wu, Ri Yan, Renjiang Zhu, Tao Wang, Lidan Jiang, Cunzhu Tong, Yanrong Song
Semiconductor disk lasers can produce high output power and good beam quality simultaneously. The high intracavity circulating power of about hundreds of watts, along with the flexibility of tailorable emitting wavelengths, make it an attractive light source for obtaining ultraviolet (UV) radiation from near-infrared lasers through nonlinear frequency conversion. This work reports a frequency tripled 327 nm semiconductor disk laser with record output power and wavelength tuning range by using a type-I phase-matched LiB3 O5 (LBO) crystal and a type-I phase-matched β-BaB2 O4 (BBO) crystal as the frequency-doubling and -tripling crystals respectively...
February 12, 2024: Optics Express
https://read.qxmd.com/read/38437845/systematic-study-of-solid-state-u-vi-photoreactivity-long-lived-radicalization-and-electron-transfer-in-uranyl-tetrachloride
#29
JOURNAL ARTICLE
Jordan A Herder, Samantha J Kruse, Aaron D Nicholas, Tori Z Forbes, Eric D Walter, Herman Cho, Christopher L Cahill
Reported are the syntheses, structural characterizations, and luminescence properties of three novel [UO2 Cl4 ]2- bearing compounds containing substituted 1,1'-dialkyl-4,4'-bipyridinum dications (i.e., viologens). These compounds undergo photoinduced luminescence quenching upon exposure to UV radiation. This reactivity is concurrent with two phenomena: radicalization of the uranyl tetrachloride anion and photoelectron transfer to the viologen which constitutes the formal transfer of one electron from [UO2 Cl4 ]2- to the viologen species...
March 4, 2024: Inorganic Chemistry
https://read.qxmd.com/read/38434895/effect-of-degradation-on-the-physicochemical-and-mechanical-properties-of-extruded-films-of-poly-lactic-acid-and-chitosan
#30
JOURNAL ARTICLE
José Ramón Flores-León, Dora Evelia Rodríguez-Félix, Jesús Manuel Quiroz-Castillo, Heidy Burrola-Núñez, María Mónica Castillo-Ortega, José Carmelo Encinas-Encinas, Juana Alvarado-Ibarra, Hisila Santacruz-Ortega, Jesús Leobardo Valenzuela-García, Pedro Jesús Herrera-Franco
This study addresses the fabrication of extruded films using poly(lactic acid) (PLA) and chitosan, with and without maleic anhydride as a compatibilizing agent, for potential applications in disposable food packaging. These films underwent controlled conditions of UV irradiation, water condensation, and temperature variations in an accelerated weathering chamber. The investigation analyzed the effect of different exposure periods on the structural, morphological, mechanical, and thermal properties of the films...
February 27, 2024: ACS Omega
https://read.qxmd.com/read/38433456/the-acid-sphingomyelinase-inhibitor-imipramine-enhances-the-release-of-uv-photoproduct-containing-dna-in-small-extracellular-vesicles-in-uvb-irradiated-human-skin
#31
JOURNAL ARTICLE
M Alexandra Carpenter, Anita Thyagarajan, Madison Owens, Risha Annamraju, Christina B Borchers, Jeffrey B Travers, Michael G Kemp
Nucleic acids, lipids, and other cell components can be found within different types of extracellular vesicles (EVs), which include apoptotic bodies (ABs), large extracellular vesicles (LEVs), and small extracellular vesicles (SEVs). Release of LEVs from cells can be reduced by genetic or pharmacological inhibition of the enzyme acid sphinogomyelinase (aSMase), and indeed several studies have demonstrated a role for the clinically approved aSMase inhibitor imipramine in blocking LEV release, including in response to UVB exposure...
March 3, 2024: Photochemistry and Photobiology
https://read.qxmd.com/read/38428192/current-insights-and-future-perspectives-of-ultraviolet-radiation-uv-exposure-friends-and-foes-to-the-skin-and-beyond-the-skin
#32
REVIEW
Xiaoyou Tang, Tingyi Yang, Daojiang Yu, Hai Xiong, Shuyu Zhang
Ultraviolet (UV) radiation is ubiquitous in the environment, which has been classified as an established human carcinogen. As the largest and outermost organ of the body, direct exposure of skin to sunlight or UV radiation can result in sunburn, inflammation, photo-immunosuppression, photoaging and even skin cancers. To date, there are tactics to protect the skin by preventing UV radiation and reducing the amount of UV radiation to the skin. Nevertheless, deciphering the essential regulatory mechanisms may pave the way for therapeutic interventions against UV-induced skin disorders...
February 27, 2024: Environment International
https://read.qxmd.com/read/38428167/ultraviolet-irradiation-as-alternative-non-thermal-cold-pasteurization-to-improve-quality-and-microbiological-parameters-of-mango-juice-during-cold-storage
#33
JOURNAL ARTICLE
Htay Htay Wai, Khursheed Ahmad Shiekh, Saeid Jafari, Isaya Kijpatanasilp, Kitipong Assatarakul
The objectives of this research were to study the effect of UV irradiation on quality characteristics of mango juice during cold storage. Mango juice exposed to UV radiation was also used to determine zero-order and first-order kinetic models of microbial (total plate count, yeast and mold count, and Escherichia coli) reduction. According to the microbiological results, UV light at 120 J/cm2 caused a 5.19 log reduction. It was found that microbial inactivation of all tested microorganisms followed first-order kinetic model...
February 16, 2024: International Journal of Food Microbiology
https://read.qxmd.com/read/38427526/assessing-occupational-hazards-in-welding-operations-a-machine-learning-based-approach-for-worker-safety-in-indian-foundries
#34
JOURNAL ARTICLE
Mudit Garg, Gurumukh Das, Prem Prakash Vuppuluri
BACKGROUND: Quantitatively analyzing the impact of UV radiation and noise during welding operations is essential to assess the exposure, identify potential hazards, and develop targeted safety protocols to ensure worker safety and adherence to safety regulations, especially in developing countries with inadequate adherence to safety standards and resources. OBJECTIVES: This study employs machine learning for predicting ultraviolet radiation and noise levels during welding, emphasizing worker safety...
February 27, 2024: Work: a Journal of Prevention, Assessment, and Rehabilitation
https://read.qxmd.com/read/38426697/effect-of-co-surfactants-on-properties-and-bactericidal-activity-of-cu-2-o-and-hybrid-cu-2-o-ag-particles
#35
JOURNAL ARTICLE
Dam Xuan Thang, Nguyen Thuy Chinh, Nguyen Thi Binh Minh, Trinh Hoang Nghia, Thai Hoang
Nanomaterials based on metal oxides, especially Cu2 O, have received much attention in recent years due to the many unique properties of the surface plasmon resonance they provide. The report presented the co-precipitation method, a simple preparation method to produce Cu2 O oxide particles. In addition, to improve the unique antibacterial properties of Cu2 O, a proposed method is to attach Ag nanoparticles to the surface of Cu2 O particles. The Cu2 O and Cu2 O-Ag particles were synthesized based on redox reactions using ascorbic acid (LAA) as a reducing agent...
March 1, 2024: ChemistryOpen
https://read.qxmd.com/read/38423506/exposure-to-uv-radiation-in-lifeguards-on-barcelona-s-beaches-an-underestimated-occupational-risk
#36
JOURNAL ARTICLE
P Giavedoni, A Combalia, N Espinosa, J Aguilera, Susana Puig
BACKGROUND: The development of skin cancer is closely related to high exposure to UV radiation. Lifeguards are at an increased risk of excessive sun exposure. Objectives The main objective of this study was to measure the exposure of Barcelona's beach lifeguards to UV radiation. METHODS: Measurements in the work chair were taken every 30 minutes on a typical working day from 10:45 am to 19:15 pm. These measurements were carried out on four different days. These data were used to calculate the erythematous doses received during working hours, as well as those potentially received throughout the summer season...
February 27, 2024: Actas Dermo-sifiliográficas
https://read.qxmd.com/read/38414279/scalable-fabrication-of-structurally-stable-polymer-film-with-excellent-uv-shielding-fluorescent-and-antibacterial-capabilities
#37
JOURNAL ARTICLE
Kaiyuan Shen, Hongchen Liu, Changjing Qiu, Mengzhen Yuan, Zhishan Chen, Haisong Qi
This research presents a new approach to facilely fabricating a multifunctional film using polyvinyl alcohol (PVA) as the base material. The film was modified chemically to incorporate various desirable properties such as high transparency, UV-shielding, antibacterial activity, and fluorescence. The fabrication process of this film was straightforward and efficient. The modified film showed exceptional UV-blocking capability, effectively blocking 100% of UV radiation. It also exhibited strong antibacterial properties...
February 27, 2024: Macromolecular Rapid Communications
https://read.qxmd.com/read/38412702/comparative-skin-histological-and-transcriptomic-analysis-of-rana-kukunoris-with-two-different-skin-colors
#38
JOURNAL ARTICLE
Xu-Ze Zhang, Xiao-Dong Ma, Wan-Ting Wang, Fei Peng, Ye-Mao Hou, Yue-Xia Shen, Yu-Qi Sun, Jin-Fang Chen, Yi-Jin Yin, Yu-Ye Zeng, Yi Yu, Peng Zhou, Fu-Hao Zhang, Yan-Feng He, Ying-Fang Shen
This study compares the skin structures of Rana kukunoris with two different skin colors living in the same area of Haibei in the Northeastern Qinghai-Tibet Plateau. The skin thickness of the khaki R. kukunoris was significantly greater than that of the brown R. kukunoris (P < 0.01), and significantly more mucous and granular glands were present on the dorsal skin of the khaki frog (P < 0.05). Meanwhile, the melanocytes on the dorsal skin of the brown frog were significantly larger than those on the khaki one (P < 0...
February 16, 2024: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://read.qxmd.com/read/38412378/reactive-oxygen-species-formation-and-peroxide-and-carbonyl-decomposition-in-aqueous-photolysis-of-secondary-organic-aerosols
#39
JOURNAL ARTICLE
Lena Gerritz, Jinlai Wei, Ting Fang, Cynthia Wong, Alexandra L Klodt, Sergey A Nizkorodov, Manabu Shiraiwa
The mechanism and kinetics of reactive oxygen species (ROS) formation when atmospheric secondary organic aerosol (SOA) is exposed to solar radiation are poorly understood. In this study, we combined an in situ UV-vis irradiation system with electron paramagnetic resonance (EPR) spectroscopy to characterize the photolytic formation of ROS in aqueous extracts of SOA formed by the oxidation of isoprene, α-pinene, α-terpineol, and toluene. We observed substantial formation of free radicals, including • OH, superoxide (HO2 • ), and organic radicals (R• /RO• ) upon irradiation...
February 27, 2024: Environmental Science & Technology
https://read.qxmd.com/read/38412221/degradation-mechanisms-of-six-typical-glucosidic-bonds-of-disaccharides-induced-by-free-radicals
#40
JOURNAL ARTICLE
Biyang Zhu, Cong Ma, Lijun You
Increasing hydrogen peroxide (H2 O2 )-based systems have been developed to degrade various polysaccharides due to the presence of highly reactive free radicals, but published degradation mechanisms are still limited. Therefore, this study aimed to clarify the degradation mechanism of six typical glucosidic bonds from different disaccharides in an ultraviolet (UV)/H2 O2 system. The results showed that the H2 O2 concentration, disaccharide concentration, and radiation intensity were important factors affecting pseudo-first-order kinetic constants...
February 27, 2024: Journal of Agricultural and Food Chemistry
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