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Advisor(s)
Abstract(s)
Taurus flowering ash (Fraxinus ornus subsp. cilicica) is an endemic tree species in Turkey.
The bark of the species was characterized for summative chemical composition, the monomeric
composition of polysaccharides, phenolic content, in vitro and ex vivo antioxidant properties of
hydrophilic extracts, the composition of lipophilic extractives and suberin, and thermal degradation.
The bark has an elevated ash content (17%), primarily composed of calcium, and a noteworthy
extractive content (38.9%), predominantly of hydrophilic compounds. The antioxidant activity of the
bark extracts is moderate, with an IC50 value of 40 g/mL and an EC50 value of 230 g/mL by DPPH
and TBARS methods. The lipophilic extractives principally contain fatty acids and diterpenoids. The
suberin content is low (1%) and composed primarily of !-hydroxy acids with 9,10,18 trihydroxyoctadecanoic
acid as the major suberin monomer. The lignin content is low (9.8%), and polysaccharides
represent 33%. The ignition temperature of the bark is 190 C, the burnout temperature is 653 C, and
the activation energy in combustion is 29 kJ mol1. A biorefinery concept was developed considering
the bark’s chemical and thermal characteristics to convert approximately 90% of the bark mass into
valuable chemicals, extracts, functional materials, and additives.
Description
Keywords
calcium w-hydroxy acids suberin antioxidant ignition temperature
Pedagogical Context
Citation
Sen, A.U.; Simões, R.; Yüceda˘ g, C.; Miranda, I.; Fernandes, Â.; Pereira, H. Biochemical Characterization and Fuel Properties of Endemic Taurus Flowering Ash (Fraxinus ornus subsp. cilicica) Bark from Turkey. Processes 2023, 11, 2774
Publisher
MDPI