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ultravioletradiation, etc ; bioimaging; chemical bonding; color; detection limit; fluorescence; ligands; Show all 7 Subjects
Abstract:
... According to the assumption that the formation of C–Pd bond becomes a cyclopalladated complex (CPC), we designed and synthesized two C–N–N pincer ligands of BODIPY appended 2,2′-bipyridine derivatives (BP and BPB). It has been confirmed that the C–Pd bond does exist and plays a crucial role in “on-off” fluorescence behavior. Based on it, a coordination-induced fluorescence quenching sensor for Pd² ...
ultravioletradiation, etc ; DNA; Escherichia coli; Staphylococcus epidermidis; air; bacteriophages; bioaerosols; disinfection; Show all 8 Subjects
Abstract:
... Air ionizers and 222-nm krypton-chlorine (KrCl) excilamp have proven to be effective disinfection apparatus for bacteria and viruses with limited health risks. We determined inactivation efficiencies by operating them individually and in combined modules. Gram-positive and gram-negative bacteria, non-enveloped dsDNA virus, and enveloped dsRNA virus were examined in a designed air disinfection syst ...
ultravioletradiation, etc ; COVID-19 infection; aerosols; air; environmental science; filtration; irradiation; viruses; Show all 8 Subjects
Abstract:
... The COVID-19 pandemic remains ever prevalent and afflicting—partially because one of its transmission pathways is aerosol. With the widely used central air conditioning systems worldwide, indoor virus aerosols can rapidly migrate, thus resulting in rapid infection transmission. It is therefore important to install microbial aerosol treatment units in the air conditioning systems, and we herein inv ...
ultravioletradiation, etc ; cesium; density functional theory; fluorescence; heat; lead; ligands; solvents; thiols; Show all 9 Subjects
Abstract:
... Cesium lead halide perovskite quantum dots (QDs) have attracted immense attention for luminescent materials due to their narrow emission bands and color-tunable emission. However, indispensable surface ligands originating from ligand-assisted synthesis strategies severely deteriorate the stability and luminescence properties of QDs since these ligands have a highly dynamic binding. Herein, we used ...
ultravioletradiation, etc ; air; biodegradability; environment; hydrolysis; irradiation; photolysis; physical properties; plastics; spectroscopy; Show all 10 Subjects
Abstract:
... Biodegradable plastics (BPs) have been used to replace conventional plastics owing to their environmental harmless and ease of degradation. However, the aging processes of BPs in different environments remain unclear. In this study, we used poly (lactic acid)/poly (butylene adipate-co-terephthalate) (PLA/PBAT) films as model BPs and investigated the 30-d aging behavior of PLA/PBAT films under four ...
ultravioletradiation, etc ; bulk density; chitosan; encapsulation; food chemistry; oregano oil; thermal stability; titanium dioxide; Show all 8 Subjects
Abstract:
... In the present study, in order to establish a triggerable system of core-shell structure, oregano essential oil (OEO) loaded microcapsules by chitosan-decorated titanium dioxide (TiO₂) were prepared and characterized to explore their immediate triggered release abilities by UV-mediated triggers. The surface modification of chitosan composite shells could improve encapsulation yield and loose bulk ...
Luise Nottmeyer; Ben Armstrong; Rachel Lowe; Sam Abbott; Sophie Meakin; Kathleen M. O'Reilly; Rosa von Borries; Rochelle Schneider; Dominic Royé; Masahiro Hashizume; Mathilde Pascal; Aurelio Tobias; Ana Maria Vicedo-Cabrera; Eric Lavigne; Patricia Matus Correa; Nicolás Valdés Ortega; Jan Kynčl; Aleš Urban; Hans Orru; Niilo Ryti; Jouni Jaakkola; Marco Dallavalle; Alexandra Schneider; Yasushi Honda; Chris Fook Sheng Ng; Barrak Alahmad; Gabriel Carrasco-Escobar; Iulian Horia Holobâc; Ho Kim; Whanhee Lee; Carmen Íñiguez; Michelle L. Bell; Antonella Zanobetti; Joel Schwartz; Noah Scovronick; Micheline de Sousa Zanotti Stagliorio Coélho; Paulo Hilario Nascimento Saldiva; Magali Hurtado Diaz; Antonio Gasparrini; Francesco Sera
ultravioletradiation, etc ; COVID-19 infection; absolute humidity; air temperature; autocorrelation; climatic zones; environment; time series analysis; Show all 8 Subjects
Abstract:
... The associations between COVID-19 transmission and meteorological factors are scientifically debated. Several studies have been conducted worldwide, with inconsistent findings. However, often these studies had methodological issues, e.g., did not exclude important confounding factors, or had limited geographic or temporal resolution. Our aim was to quantify associations between temporal variations ...
ultravioletradiation, etc ; chromium; decontamination; dyes; electron paramagnetic resonance spectroscopy; irradiation; light emitting diodes; pH; sulfamethoxazole; wastewater; wavelengths; Show all 11 Subjects
Abstract:
... Hexavalent chromium (Cr(VI)) was activated by ultraviolet-A light-emitting diode (UVA-LED), resulting in efficient removal of various pollutants, including dye, pharmaceuticals, and pesticides, with pseudo-first-order rate constants of 0.0610–0.159 min⁻¹. Comparatively, UVA-LED or Cr(VI) alone barely degraded selected pollutants. Both HO• and Cr(V) were produced in the UVA-LED/Cr(VI) system based ...
... Gardenia blue could be effectively stabilized by gelatin and could be further enhanced by high-temperature based covalent-crosslinking reaction. The crosslinking reaction between amino acids and genipin promotes the generation of new gardenia blue molecules, facilitates the stable network structure, and improves the thermal stability of gelatin-gardenia blue systems (T₁ increased to 90 °C and T₂ i ...
... The main limitation associated with the oral delivery of ascorbyl palmitate, a potent food antioxidant, is its susceptibility to oxidative deterioration. The main objective of the current research was to encapsulate ascorbyl palmitate into corn starch matrix using extrusion cooking and evaluate its release behavior and oxidative stability. Results showed that ascorbyl palmitate was efficiently enc ...
ultravioletradiation, etc ; anthocyanins; antioxidants; chitosan; color; emulsions; freshness; hydrocolloids; milk; oranges; pH; shelf life; strength (mechanics); temperature; thermal stability; thyme oil; water vapor; Show all 17 Subjects
Abstract:
... Novel multifunctional food packaging was developed by incorporating blood orange anthocyanins (BOA) and thyme oil (TO) emulsion into a chitosan-gum Arabic film matrix. The basic properties, pH/volatile acid sensitivity, and functional characteristics of the multifunctional films were investigated. BOA solution illustrated significant color variations (from pink to violet to yellow) under different ...
... Two kinds of N-hydrophobic-O-hydrophilic chitosan derivatives, N-2-hydroxypropyl-3-butyl ether-O-carboxymethyl chitosan (HBCC) and N-2-hydroxypropyl-3-(2-ethylhexyl glycidyl ether)-O-carboxymethyl chitosan (H2ECC) were synthesized and cross-linked with glutaraldehyde to prepare HBCC and H2ECC films. The properties of the cross-linked films, including microstructure, mechanical properties, water va ...
ultravioletradiation, etc ; food science; health services; hormone receptors; humans; hydrophobicity; hyperpigmentation; inflammation; ingredients; licorice; melanocytes; melanogenesis; melanoma; mice; models; protein synthesis; roughness; therapeutics; transcription (genetics); transcription factors; Show all 20 Subjects
Abstract:
... Glabridin is the main ingredient of hydrophobic fraction in licorice extract and has been shown to have anti-melanogenesis activity in skins. However, the underlying mechanism(s) remain not completely understood. The aim of this study is thus to elucidate the possible mechanisms related to the melanogenesis suppression by glabridin in cultured B16 murine melanoma cells and in UVA radiation induced ...
ultravioletradiation, etc ; Fourier transform infrared spectroscopy; Gracilaria; bass; calorimeters; carboxymethylcellulose; color; electron microscopy; galactose; galacturonic acid; glucose; hydrocolloids; lysozyme; macroalgae; microstructure; modulus of elasticity; molecular weight; shelf life; tensile strength; total volatile basic nitrogen; toxicity; viscosity; Show all 22 Subjects
Abstract:
... In this study, Gracilaria chouae polysaccharide (GCP) was prepared and mixed with carboxymethylcellulose (CMC) and lysozyme to develop a novel active packaging film (named GCLF). The GCP was mainly composed of galactose (55.17%), glucose (21.87%) and galacturonic acid (6.3%), with a high molecular weight (>700 kDa). It also showed pseudoplastic behavior and high apparent viscosity at 3%, presentin ...
... Flux synthesis is an effective method to discover large crystals of new compounds. In this paper, a solid-state reaction in Li flux produced a new nitridolithosilicate La₄Ba₃Li₃Si₉N₁₉ in the orthorhombic space group Cmcm (No. 63) with lattice parameters of a = 9.7263(1), b = 18.2746(2), c = 11.2929(1) Å, and Z = 4. The La₄Ba₃Li₃Si₉N₁₉ exhibits a 3-D framework based on triangular clusters (3-rings) ...
ultravioletradiation, etc ; hydrogels; photolysis; photoreduction; Show all 4 Subjects
Abstract:
... Hydrogel actuators have gained considerable interest and experienced significant advancements in recent years. However, the programming of their actuating behaviors is still challenging. Herein, we report the development and regulation of gradient structures of hydrogels for programmable thermally responsive actuating behaviors. The hydrogel actuators are developed by controlling the photoreductio ...
... Plasma-catalysis has attracted great attentions in environmental/energy-related fields, but the synergetic mechanism still suffers intractable defects. Key issues are that what kind of catalysts are applicable for plasma system, how are they activated in plasma, and how to characterize them in plasma. This review systematically gives a comprehensive summarization of the selection of catalysts and ...
ultravioletradiation, etc ; clay; irradiation; photoisomerization; Show all 4 Subjects
Abstract:
... Although smectite-type clays are used as heterogeneous media for photofunctional guest molecules, the guest species are limited to cationic or polar molecules because of the intrinsic negative electric charges of clay particles. Nevertheless, in this study, aqueous clay colloids are reported to affect the photoisomerization kinetics of anionic and cationic azobenzene molecules dissolved in the col ...
ultravioletradiation, etc ; electrodes; electronics; lighting; Show all 4 Subjects
Abstract:
... Low dark current density plays a key role in determining the overall performance of perovskite photodetectors (PPDs). To achieve this goal, a hole transport layer (HTL) on the ITO side and a hole blocking layer (HBL) on the metal electrode side are commonly introduced in PPDs. Unlike traditional approaches, we realized a high-performance solution-processed broadband PPD using metal oxide (MO) nano ...
Evgueni Gorobets; James W. Papatzimas; Jorge Dourado; Goonay Yousefalizadeh; JinGyu Lee; Duncan K. Brownsey; Kevin Stamplecoskie; Rebecca Davis; Darren J. Derksen
... The reactions of bicyclic divinyl ketones display wavelength-dependent changes in product formation. UV irradiation results in the formation of competitive [6,3,5] and [7,3,5] tricyclic unsaturated ketones that subsequently undergo ring expansion and reaction with a range of nucleophiles. DFT calculations and transient absorption experiments were completed that are consistent with a vinylogous Typ ...