Search results for "LYST"

showing 4 items of 904 documents

Thiazolium salts as catalysts for etherification reaction

2014

thiazoliumSettore CHIM/06 - Chimica Organicasupported catalystsEther
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Organocatalytic Enantioselective Vinylogous Henry Reaction of 3,5-Dimethyl-4-nitroisoxazole with Trifluoromethyl Ketones

2017

The enantioselective vinylogous Henry reaction of 3,5-dimethyl-4-nitroisoxazole with trifluoromethyl ketones employing a bifunctional squaramide organocatalyst has been developed. A series of isoxazole bearing trifluoromethyl-substituted tertiary alcohols, 2-substituted (R)-1,1,1-trifluoro-3-(3-methyl-4-nitroisoxazol-5-yl)propan-2-ols, were obtained under these mild reaction conditions in good yields and moderate to good enantioselectivities

trifluoromethyl ketoneReaction conditionsNitroaldol reactionTrifluoromethyl010405 organic chemistryasymmetric synthesisisoxazoleOrganic ChemistryEnantioselective synthesisSquaramide010402 general chemistry01 natural sciencesCatalysis0104 chemical scienceschemistry.chemical_compoundchemistrysquaramide organocatalystvinylogous Henry reactionOrganic chemistryIsoxazoleBifunctionalTertiary alcoholsSynthesis
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Développement et caractérisation d’électrodes pour l’électrolyse alcaline de l’eau

2020

Splitting water into hydrogen and oxygen by electrolysis using electricity from intermittent ocean current, wind, or solar energies is one of the easiest and cleanest routes for high-purity hydrogen production and an effective way to store the excess electrical power without leaving any carbon footprints. The key dilemma for efficient large-scale production of hydrogen by splitting of water via the hydrogen and oxygen evolution reactions is the high overpotential required, especially for the oxygen evolution reaction. Hence, engineering highly active and stable earth-abundant oxygen evolution electrocatalysts with three-dimensional hierarchical porous architecture via facile, effective and …

Électrocatalyseur à évolution d'oxygène[CHIM.OTHE] Chemical Sciences/OtherÉlectrolyseHydrogen productionProduction d'hydrogène[CHIM.OTHE]Chemical Sciences/OtherElectrolysisOxygen evolution electrocatalyst
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Jūras piekrastē sastopamo vīteņaugu Calystegia sepium un Calystegia soldanella sālsizturība: modeļsistēmas izveide un aprobācija

2021

Pētījuma mērķis bija kontrolētos apstākļos pārbaudīt žoga dižtīteņa un Calystegia soldanella sālsizturību un jonu uzkrāšanos NaCl ietekmē, izmantojot veģetatīvās pavairošanas modeļsistēmu, kas izveidota no dažādos biotopos pieejamiem žoga dižtīteņa augiem un Calystegia soldanella komerciāli pieejamām sēklām. Augus audzēja automātiskajā siltumnīcā, apstrādāja ar dažādu koncentrāciju NaCl. Pēc novākšanas veica mērījumus un jonu analīzes žāvētām augu daļām. Žoga dižtīteni var efektīvi pavairot ar nobriedušu rizomu fragmentiem un dzinumu spraudeņiem ar lapu. Pēdējā gadījumā pavairoto augu augšanas potenciāls laikā ir ierobežots. C. soldanella var efektīvi pavairot ar dzinuma spraudeņiem ar lapu…

žoga dižtītenisjonu uzkrāšanāssālsizturībaCalystegia soldanellaBioloģija
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