D Isoascorbic Acid
Mostrando 1-3 de 3 artigos, teses e dissertações.
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1. Studies toward the synthesis of pyrrolizidine and indolizidine alkaloids : use of (+)-retronecine and D-insoascorbic acid / Estudos visando a sintese de alcaloides pirrolizidinicos e indolizidinicos : aproveitamento da (+)-retronecina e do acido D-isoascorbico
O trabalho desenvolvido visou a obtenção de alcalóides pirrolizidínicos e indolizidínicos utilizando a (+)-retronecina (1) e o ácido D-isoascórbico (35D) como matérias primas, respectivamente. A retronecina (1) foi isolada da espécie vegetal Senecio brasiliensis. Para a preparação da base necínica (1R,6S,7S,8R)-7- (hidroximetil)-hexaidro-1H-pirro
Publicado em: 2006
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2. Development and validation of analytical methodology, using the HPLC for determination of vitamin C in fruits and its main products / Desenvolvimento e validação de metodologia analitica, utilizando a CLAE, para determinação de vitamina C em frutas e seus principais produtos
Currently, amongst commercially available vitamins, vitamin C is the most important. Due to its efficient antioxidant action, it is used in foods and widely in farmaceauticals. Ofthe substances which present this vitaminic activity, L-ascorbic acid (AA) is a well known and commercialized form, though its oxidation product, dehydroascorbic acid (DHAA) possess
Publicado em: 1998
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3. Ascorbic acid mediates acetylcholine receptor increase induced by brain extract on myogenic cells.
Extracts of fetal calf brain cause a 3- to 5-fold increase in acetylcholine receptors (AcChoR) on cultured myogenic L5 cells. Purification of the substance causing the major portion of this receptor increase has been completed. Ultraviolet spectral characteristics, nuclear magnetic resonance, mass spectra, and AcChoR induction by the active factor are the sa