Search results for "TRIAC"
showing 10 items of 203 documents
Clean and Sustainable Biodiesel Production
2015
To date, the majority of world's primary energy is derived from fossil fuels. However, the fossil fuel recourses are in an inevitable decline as energy demand continues to grow exponentially with population growth, urbanization, and improved standards of living. Crude oil prices have recently risen several times and their current annual volatility exceeds 30%. The potential scarcity of fossil fuels has prompted a global search for alternative energy resources. Biodiesel fulfills the major requirements for production of alternative fuels such as feedstock availability, technical feasibility, and economic competitiveness. Together with other renewable biofuels, the use of biodiesel as a subst…
CCDC 902683: Experimental Crystal Structure Determination
2013
Related Article: Yu Chen, Derong Cao, Lingyun Wang, Minqing He, Lixia Zhou, Dieter Schollmeyer, Herbert Meier|2013|Chem.-Eur.J.|19|7064|doi:10.1002/chem.201204628
Triacylglycerols in edible oils: Determination, characterization, quantitation, chemometric approach and evaluation of adulterations
2017
Vegetable oils are a dietary source of lipids that constitute an essential component of a healthy diet. The commonly used vegetable oils differ significantly for their triacylglycerol (TAG) profile. TAGs represent the principal components of oils and may contain different fatty acids (FA) esterified with glycerol leading to several positional isomers. To differentiate individual TAGs species in edible oils, advanced analysis systems and innovative methods are therefore required. TAGs can be considered as good fingerprints for quality control and many studies have been performed to develop rapid and low cost analytical methods to determinate the authenticity, origin and eventually evidence f…
Lipolytic activity of the yeast species associated with the fermentation/storage phase of ripe olive processing.
2010
9 páginas, 4 figuras, 5 tablas.-- El Pdf del artículo es la copia de autor.
Pérdida aparente y cuantitativa de ácidos grasos y especies de triglicéridos a temperatura de fritura
2012
[EN]: Olive and sunflower oils were heated at 180 °C for 5, 10 and 15 hours with the aim of defining the changes in the contents of fatty acid methyl esters (FAME) and triacylglycerols (TAG) under frying conditions. Differences between apparent and real loss of FAME or TAG are defined for an adequate interpretation of the changes taking place at high temperature. Such differences depend on the expression of the results and frequently result in erroneous conclusions. Results showed that from the normalized composition it could be deduced that only the most unsaturated FAME (C18:2) or TAG containing it was significantly altered. However, quantitative data indicated that all the unsaturated FA…
Lipase-catalysed preparation of acyl derivatives of the germacranolide cnicin
2009
Several acyl derivatives of cnicin were obtained through lipase-catalysed acylation and alcoholysis reactions. In most reactions lipases showed a regioselective behaviour affording only one product. Longer chain acyl derivatives were prepared at lower temperature than the used in lipase-catalysed reactions, to preclude side products formation. The enzymatic approach let to prepare a family of novel acetyl and fatty acid derivatives of cnicin which are not obtainable following traditional organic synthetic procedures. Fil: Monsalve, Leandro Nicolas. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Unidad de Microanálisis…
Construint la revolta. Política, comunicació i mobilització social en la gènesi de l'austriacisme valencià
2015
El dia 1 de novembre de l’any 1700 moria, sense fills, Carles II, rei d’Espanya. L’obertura del seu document testamentari, on es declarava hereu Felip de Borbó, nét del rei de França, va desfermar un conflicte internacional que, durant més d’una dècada, va convertir Europa en camp de batalla. Al Regne de València, com a la major part de territoris que formaven la Monarquia Hispànica, les últimes voluntats del difunt monarca van ser acceptades i Felip V va ser reconegut per les institucions com a rei. Aleshores, res no feia presagiar que, en menys de cinc anys, l’arxiduc Carles d’Àustria seria aclamat per centenars de valencians com a rei d’Espanya i que aquests no dubtarien a prendre les ar…
The inhibitory effect of a novel neem paste against cariogenic bacteria
2021
Background Dental caries is a major oral health problem, which associates with cariogenic bacteria. Streptococcus mutans and Lactobacillus acidophilus are facultative anaerobic bacteria that are found in tooth decay. Accordingly, neem leaf extract was developed due to its great anti-microbial property against many bacteria. The aim of this study was to determine anti-cariogenic properties of neem leaf extract in a novel paste preparation. Material and Methods The neem extract was derived from maceration of dry neem leaves in ethanol for 48 h. The ethanolic extract was subjected to chemical identification using GC-MS. Neem pastes were prepared from ethanolic extract mixed with polyethylene g…
Interesterification of rapeseed oil catalysed by a low surface area tin (II) oxide heterogeneous catalyst
2018
Abstract The interesterification of rapeseed oil was performed in a batch reactor using for the first time low surface area massive tin(II) oxide as heterogeneous catalyst and methyl acetate as acyl acceptor. The effect of reaction temperature, methyl acetate to oil molar ratio and catalyst loading on the performances of the process were investigated. Yields in fatty acid methyl esters (FAMEs) and triacetin (TA) up to 90% and 70% respectively, were achieved after 4 h of reaction time at 483 K in the presence of 0.69 mol of SnO per mole of rapeseed oil using a methyl acetate to oil molar ratio of 40. Quite interestingly, the catalyst performances improved when water was added to the reaction…
Istarske glazbene teme i portreti od 16. do 19. stoljeca
2007
The book “Themes and Portraits of Music in Istria from 16th to 19th Centuries” is a revised collection of essays previously published in Italian, Croatian and Slovenian. It can offer a comprehensive survey on various aspects of music history of Istria between 16th and 19th century. In a wider sense, it considers the role of music in different contexts examining the patronage of churches, academies and noblemen within the frame of a multilingual area, in which Italian and Slavic cultures co-existed, Divided between Venice and Habsburg government, and now between Slovenia, Croatia and Italy (with the small town of Muggia), the peninsula, till today, represents an unsolved issue if the histori…