Suberin Fatty Acids from Outer Birch Bark: Isolation and Physical Material Characterization.
J Nat Prod
; 80(4): 916-924, 2017 04 28.
Article
em En
| MEDLINE
| ID: mdl-28333461
ABSTRACT
The isolation and physical material properties of suberin fatty acids (SFAs) were investigated with special reference to their potential applications as novel pharmaceutical excipients. SFAs were isolated from outer birch bark (OBB) with a new extractive hydrolysis method. The present simplified isolation process resulted in a moderate batch yield and chemical purity of SFAs, but further development is needed for establishing batch-to-batch variation. Cryogenic milling was the method of choice for the particle size reduction of SFAs powder. The cryogenically milled SFAs powder exhibited a semicrystalline structure with apparent microcrystalline domains within an amorphous fatty acids matrix. The thermogravimetric analysis (TGA) of SFAs samples showed a good thermal stability up to 200 °C, followed by a progressive weight loss, reaching a plateau at about 95% volatilization at about 470 °C. The binary blends of SFAs and microcrystalline cellulose (MCC; Avicel PH 101) in a ratio of 2575 (w/w) displayed good powder flow and tablet compression properties. The corresponding theophylline-containing tablets showed sustained or prolonged-release characteristics. The physicochemical and bulk powder properties of SFAs isolated from OBB are auspicious in terms of potential pharmaceutical excipient applications.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Betula
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Casca de Planta
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Ácidos Graxos
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Lipídeos
Idioma:
En
Revista:
J Nat Prod
Ano de publicação:
2017
Tipo de documento:
Article