English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This study aims to investigate the sugar components which play an important role in the process of heartwood formation in young  Swietania mahagoni . The methanol-water (70/30, v/v) extract was analyzed by GC-MS to determine sugar constituents. The content of methanol-water extract ranged from 3.7 to 7.8% based on dried wood. After a 4-5 year duration of heartwood formation in the sapwood, monosaccharide and alditol fractions doubly increased. This was followed by almost five times the content of cyclitols. In a radial variation, the content of major monosaccharides including fructose, glucose, mannose and xylose decreased from sapwood to heartwood, while arabinose, galactose, and sucrose in the age 5 years were only found in the sapwood. Meanwhile, the main content of cyclitols and alditols (arabitol) significantly decreased from sapwood to heartwood. The main monosaccharides and disaccharides represented by sucrose played a key role in the process of heartwood formation. Further studies are required to investigate the phenolic and lipophilic components as both are involved in heartwood formation. In addition, similar studies on alditol and cyclitol regarding their role in tropical wood are necessary.

Analysis of sugar components related to heartwood formation in young Swietenia mahagoni (L.) Jacq trees