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Comprobado (hosted by Maldita.es). [ 135] Miniver.org: the first fact-checking web in Spain, launched in 2017, with the purpose of debunking fake news. Accredited by Google as fact-checking organization. [ 136] Newtral: Spanish fact-checking organization founded by journalist Ana Pastor from LaSexta.
Vinyl siding is plastic exterior siding for houses and small apartment buildings, used for decoration and weatherproofing, imitating wood clapboard, batten board and batten or shakes, and used instead of other materials such as aluminum or fiber cement siding. It is an engineered product, manufactured primarily from polyvinyl chloride (PVC) resin.
In situ chemical oxidation. In situ chemical oxidation ( ISCO ), a form of advanced oxidation process, is an environmental remediation technique used for soil and/or groundwater remediation to lower the concentrations of targeted environmental contaminants to acceptable levels. ISCO is accomplished by introducing strong chemical oxidizers into ...
A silsesquioxane is an organosilicon compound with the chemical formula [RSiO 3/2] n (R = H, alkyl, aryl, alkenyl or alkoxyl .). [ 1] Silsesquioxanes are colorless solids that adopt cage-like or polymeric structures with Si-O-Si linkages and tetrahedral Si vertices. Silsesquioxanes are members of polyoctahedral silsesquioxanes ("POSS"), which ...
tert-Butyl peroxybenzoate ( TBPB) an organic compound with the formula C6H5CO3CMe3 (Me = CH 3 ). It is the most widely produced perester; it is an ester of peroxybenzoic acid ( C6H5CO3H ). It is often used as a radical initiator in polymerization reactions, such as the production of LDPE from ethylene, and for crosslinking, such as for ...
The company began marketing its product, Fullback Thermal Support System, in the United States as an improvement over traditional vinyl siding. Initial versions of insulated vinyl siding were field-tested in Georgia. Between 1993 and 1997, design and process solutions were developed to improve the functionality and durability of the product. In ...
Vinyl acetate is the acetate ester of vinyl alcohol. Since vinyl alcohol is highly unstable (with respect to acetaldehyde ), the preparation of vinyl acetate is more complex than the synthesis of other acetate esters. The major industrial route involves the reaction of ethylene and acetic acid with oxygen in the presence of a palladium catalyst ...
Hydrazone iodination is an organic reaction in which a hydrazone is converted into a vinyl iodide by reaction of iodine and a non-nucleophilic base such as DBU. [1] [2] First published by Derek Barton in 1962 the reaction is sometimes referred to as the Barton reaction (although there are many different Barton reactions) or, more descriptively, as the Barton vinyl iodine procedure.