Results 31 to 40 of about 32,686 (262)
Ultraviolet radiation and melanogenesis [PDF]
Archive of Oncology, 2004 Light radiation is a part of the electromagnetic radiation, and it consists of the ultraviolet (UV) radiation, visible light, and infrared radiation.
Stanojević Milenko R. +3 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé +5 more
wiley +1 more source
Knowledge and habits of solar exposure in street traders of a market in Chiclayo, Peru
Revista de la Facultad de Medicina Humana, 2020 Background: people who work outdoors are exposed to long periods of ultraviolet radiation; such is the case of street vendors. Objectives: determine the knowledge and habits of solar exposition in itinerant traders around a Chiclayo market. Materials and
Sherly Raquel Sempértegui-Ruiz +7 more
doaj +1 more source
Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma
Advanced Engineering Materials, EarlyView.The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie +4 more
wiley +1 more source
Total ozone column above the territory of Serbia and Montenegro [PDF]
Srpski Arhiv za Celokupno Lekarstvo, 2006 Introduction: Atmospheric ozone attenuates ultraviolet radiation reaching the Earth’s surface. Since UV-B radiation is considered the principal factor of causing the skin cancers, cataracts and some immunological disorders, determination of total ozone ...
Letić Milorad
doaj +1 more source
Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures
Advanced Engineering Materials, EarlyView.This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley +1 more source
JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN, 1928 此の講演は自分の研究の結果を發表したのではなく, 今日まで多くの人々によつて研究された事柄を目次に示すやうに分類し, 紫外線の呈する多くの作用を述べ, それが實際上如何なる方面に應用されて居るかを解説したものである。日光は保健上有効であると云ふことは二千年の昔から知られて居たが, それは學術的に根据はなかつた。日光の中に紫外線のあることは十九世紀の始めに發見された。それから漸次日光の中の紫外線が人體に有効であると云ふことが知られ, 紫外線の分量の多い高山に療養所が出來るやうになつた。而して今日では尚張い紫外線を出す人工的の光源を病症治癒のために用ひるやうになつた。既は紫外線の有する殺菌作用及生理的亢進作用に依るのである。又紫外線の有する螢光作用及燐光作用は寳石, 手形 ...
openaire +2 more sources
Advanced Engineering Materials, EarlyView.Fungal mycelia grown into biodegradable scaffolds and infused with titania nanoparticles show enhanced ultraviolet shielding, thermal protection, and surface nonwettability. Properties were tuned by drying methods, revealing structure–function relationships.
Juwon S. Afolayan +2 more
wiley +1 more source
Case Studies in Chemical and Environmental EngineeringPolylactic acid (PLA) is a linear aliphatic polyester thermoplastic made from renewable sources such as sugar beet and cornstarch. Methods of preparation of polylactic acid are biological and chemical.
Yathrib Ajaj +9 more
doaj +1 more source
Synthesis and Characterization of Titania-Rice Husk Silica Composites as Photocatalyst
Indonesian Journal of Chemistry, 2015 This article describes the synthesis of titania-silica composites by a sol-gel method using a mixture of silica of rice husk and titanium butoxide sols.
Posman Manurung +3 more
doaj +1 more source