Characterization of Sago Palm (Metroxylon sagu) Lignin by Analytical Pyrolysis

2001 ◽  
Vol 49 (4) ◽  
pp. 1840-1847 ◽  
Author(s):  
Ken-ichi Kuroda ◽  
Tetsuo Ozawa ◽  
Takahiro Ueno
Keyword(s):  
Analytical Pyrolysis ◽  
Sago Palm ◽  
Metroxylon Sagu

Characterization of Hydrocarbon Emissions from Green Sand Foundry Core Binders by Analytical Pyrolysis

2007 ◽  
Vol 41 (22) ◽  
pp. 7922-7927 ◽  
Author(s):  
Yujue Wang ◽  
Fred S. Cannon ◽  
Magda Salama ◽  
Jeff Goudzwaard ◽  
James C. Furness
Keyword(s):  
Hydrocarbon Emissions ◽  
Analytical Pyrolysis ◽  
Green Sand

scholarly journals Photosynthesis of Sago Palm (Metroxylon sagu Rottb.) Seedling at Different Air Temperatures

Agriculture ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 4 ◽  
Author(s):  
Aidil Azhar ◽  
Daigo Makihara ◽  
Hitoshi Naito ◽  
Hiroshi Ehara
Keyword(s):  
Sago Palm ◽  
Air Temperatures ◽  
Metroxylon Sagu

Structural characterization of milled wood lignins from different eucalypt species

Holzforschung ◽  
2008 ◽  
Vol 62 (5) ◽  
Author(s):  
Jorge Rencoret ◽  
Gisela Marques ◽  
Ana Gutiérrez ◽  
David Ibarra ◽  
Jiebing Li ◽  
...  
Keyword(s):  
Eucalyptus Globulus ◽  
Chemical Structure ◽  
2D Nmr ◽  
Analytical Pyrolysis ◽  
Additional Information ◽  
Diaryl Ether ◽  
Heteronuclear Single Quantum Correlation ◽  
Relative Abundances ◽  
Type 3

Abstract The chemical structure of milled-wood lignins from Eucalyptus globulus, E. nitens, E. maidenii, E. grandis, and E. dunnii was investigated. The lignins were characterized by analytical pyrolysis, thioacidolysis, and 2D-NMR that confirmed the predominance of syringyl over guaiacyl units and only showed traces of p-hydroxyphenyl units. E. globulus lignin had the highest syringyl content. The heteronuclear single quantum correlation (HSQC) NMR spectra yielded information about relative abundances of inter-unit linkages in the whole polymer. All the lignins showed a predominance of β-O-4′ ether linkages (66–72% of total side-chains), followed by β-β′ resinol-type linkages (16–19%) and lower amounts of β-5′ phenylcoumaran-type (3–7%) and β-1′ spirodienone-type linkages (1–4%). The analysis of desulfurated thioacidolysis dimers provided additional information on the relative abundances of the various carbon-carbon and diaryl ether bonds, and the type of units (syringyl or guaiacyl) involved in each of the above linkage types. Interestingly, 93–94% of the total β-β′ dimers included two syringyl units indicating that most of the β-β′ substructures identified in the HSQC spectra were of the syringaresinol type. Moreover, three isomers of a major trimeric compound were found which were tentatively identified as arising from a β-β′ syringaresinol substructure attached to a guaiacyl unit through a 4-O-5′ linkage.

scholarly journals Differential Metabolites Markers from Trunking and Stressed NonTrunking Sago Palm (Metroxylon sagu Rottb.)

2020 ◽  
Vol 14 ◽  
Author(s):  
Hasnain Hussain ◽  
Wei-Jie Yan ◽  
Zainab Ngaini ◽  
Norzainizul Julaihi ◽  
Rina Tommy ◽  
...  
Keyword(s):  
Extraction Method ◽  
Methanol Extract ◽  
Economic Value ◽  
Principal Component ◽  
Leaf Extracts ◽  
Sulfurous Acid ◽  
Sago Palm ◽  
Hexyl Ester ◽  
Metroxylon Sagu ◽  
Metabolite Markers

Background: Sago palm is an important agricultural starch-producing crop in Malaysia. The trunk of sago palm is responsible for the production of the starch reaching maturity for harvesting after ten years. However, there are sago palms that failed to develop its trunk after 17 years being planted. This is known as a stressed “non-trunking” sago palm, which eliminates the economic value of the palms. Objective: The study was initiated to compare the differences in metabolite expression between trunking and non-trunking sago palm and secondly to determine the potential metabolite-makers that are related to differential phenotypes of sago palms. Method: Metabolites were extracted using various solvents and analysed using NMR spectroscopy and GC-MS spectrometry. Data obtained were subjected to principal component analysis. Results: The study determined that differential metabolites expression were detected in the leaf extracts of normal trunking sago palm compared to the non-trunking palms. Metabolite groups which are differently expressed between trunking and non-trunking sago palm are oils and waxes, haloalkanes, sulfite esters, phosphonates, phosphoric acid, thiophene ester, terpenes and tocopherols. GC-MS analysis of Jones & Kinghorn extraction method determined two sets of metabolite markers which explains the differences in metabolites expression of trunking and non-trunking sago palm in ethyl acetate and methanol extract of 89.55% comprising sulfurous ester compounds and 87.04% comprising sulfurous ester, sulfurous acid and cyclohexylmethyl hexyl ester respectively. Conclusion: Two sets of metabolite markers were expressed in the trunking and non-trunking sago palm. These metabolites can potentially be used as markers for identifying normal and stressed plants.

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