Results 31 to 40 of about 48,877 (239)

Photodynamics of potent antioxidants: ferulic and caffeic acids [PDF]

, 2016
The dynamics of ferulic acid (3-(4-hydroxy-3-methoxyphenyl)-2-propenoic acid) and caffeic acid (3-(3,4-dihydroxyphenyl)-2-propenoic acid) in acetonitrile, dioxane and water at pH 2.2 following photoexcitation to the first excited singlet state are ...
Baker, L.A., Greenough, S.E., Horbury, M.D., Quan, W.-D., Stavros, V.G.   +4 more
core   +2 more sources

Differential Occurrence of Cuticular Wax and Its Role in Leaf Physiological Mechanisms of Three Edible Aroids of Northeast India [PDF]

, 2022
The localization of cuticular wax (CW) on the leaf epidermis and its interaction with the physiological mechanisms of three edible aroids, Alocasia, Colocasia, and Xanthosoma, were assessed.
Acharya, Gobinda Chandra, Dasgupta, Madhumita, Devi, Mayengbam Premi, Devi, Yumnam Indrani, Messina, Valeria Marisa, Mohanty, Sansuta, Nongdam, Potshangbam, Pieniazek, Facundo, Sahoo, Bibhuti Bhusan, Sahoo, Manas Ranjan, Singh, Satyapriya   +10 more
core   +1 more source

Formation of chlorinated breakdown products during degradation of sunscreen agent, 2-ethylhexyl-4-methoxycinnamate in the presence of sodium hypochlorite [PDF]

Gackowska, A., Przyby{\l}ek, M., Studzi\'nski, W. et al. Environ Sci Pollut Res (2016) 23: 1886. https://doi.org/10.1007/s11356-015-5444-0, 2018
In this study, a new degradation path of sunscreen active ingredient, 2-ethylhexyl-4-methoxycinnamate (EHMC) and 4-methoxycinnamic acid (MCA) in the presence of sodium hypochlorite (NaOCl), was discussed. The reaction products were detected using gas chromatography-mass spectrometry (GC-MS).
arxiv   +1 more source

Aktivitas Anti UV-B Ekstrak Fenolik Dari Tongkol Jagung (Zea Mays L.) [PDF]

, 2012
Tujuan penelitian ini adalah untuk menentukan kandungan total fenolik dari ekstrak tongkol jagung dan aktivitasnya sebagai anti UV-B. Tongkol jagung diekstrak dengan pelarut etanol 20 (E20), 40 (E40), 60 (E60) dan 80% (E80) dengan cara refluks.
Lumempouw, L. (Liemey), Paendong, J. (Jessy), Suryanto, E. (Edi)   +2 more
core   +2 more sources

Comportamento relativo à exposição e proteção solar na população de 15 anos ou mais de 15 capitais brasileiras e Distrito Federal, 2002-2003 Behaviors related to sunlight exposure versus protection in a random population sample from 15 Brazilian State capitals and the Federal District, 2002-2003

Cadernos de Saúde Pública, 2007
Este artigo explora a relação entre variáveis sócio-demográficas e comportamentais com proteção solar, levando-se em consideração as diferenças regionais existentes.
André Salem Szklo, Liz Maria de Almeida, Valeska Figueiredo, José de Azevedo Lozana, Gulnar Azevedo e Silva Mendonça, Lenildo de Moura, Moysés Szklo   +6 more
doaj   +1 more source

Sunscreen: Photometric Signatures of Galaxies Partially Cloaked in Dyson Spheres [PDF]

PASP 131 024102 (2019), 2018
The Search for Extraterrestrial Intelligence has so far come up negative for Kardashev Type III societies that capture all starlight from a galaxy. One possible reason is that shrouding a star in a megastructure is prohibitively expensive. Most of a galaxy's starlight comes from bright stars, which would require structures even larger than the ...
arxiv   +1 more source

Experimental and theoretical studies on the photodegradation of 2-ethylhexyl 4-methoxycinnamate in the presence of reactive oxygen and chlorine species [PDF]

Gackowska, A., Przyby{\l}ek, M., Studzi\'nski, W. et al. cent.eur.j.chem. (2014) 12: 612. https://doi.org/10.2478/s11532-014-0522-6, 2018
2-Ethylhexyl 4-methoxycinnamate (EHMC) is one of the most commonly used sunscreen ingredient. In this study we investigated photodegradation of EHMC in the presence of such common oxidizing and chlorinating systems as H2O2, H2O2/HCl, H2O2/UV, and H2O2/HCl/UV.
arxiv   +1 more source

Extractos acuoso y rico en polifenoles de Larrea divaricata Cav: Como potenciales agentes protectores de la piel [PDF]

, 2021
Las células de la piel se ven afectadas por el estrés oxidativo inducido por los rayos ultravioleta resultando en foto-envejecimiento y enfermedades. El objetivo de este trabajo fue evaluar el efecto de un extracto acuoso de Larrea divaricata (Aq) y una ...
Alonso, Maria del Rosario, Anesini, Claudia Alejandra, Barreiro Arcos, María Laura, Cogoi, Laura Carolina, Marrasini, Carla, Martino, Renzo Fabricio, Saint Martin, Elina Malén   +6 more
core   +1 more source

Optics of sunscreen lotions: Preliminary results on scattering and absorption coefficients [PDF]

arXiv, 2022
Sunscreen lotions are used to protect the skin from damage due to solar ultraviolet (UV) radiation. The active UV blocking components can be organic molecules or inorganic particles, for example TiO2. While both in vivo and in vitro methods exist for assessing the protective capacity of sunscreens, their basic optical properties have received little ...
arxiv  

The Effect of a Sunscreen Containing Para-aminobenzoic Acid on the Systemic Immunologic Alterations Induced in Mice by Exposure to UVB Radiation [PDF]

, 1984
Application of a sunscreen containing para-aminobenzoic acid partially abrogated certain of the systemic immunologic alterations produced in mice by exposure to UVB (280–320 nm) radiation from sunlamp bulbs.
Direcció de Serveis de Projectes Urbans, Gri Espinagosa, Josep   +1 more
core   +1 more source