Study on the chemical composition of teak wood extracts in different organic solvents

Many of current bio-based materials are not fully or partly used for material utilization, as the composition of their raw materials and/or possible applications are unknown. This study deals with the analysis of the wood extractives from three different tissue of larch wood: Sapwood mainly from outer part of the log, and sound knotwood as well as dead knotwood. The extractions were performed with an accelerated solvent extractor (ASE) using hexane and acetone/water. The obtained extracts were analyzed by gas chromatography coupled to mass spectrometry (GC-MS). Three various vibrational spectroscopy (FT-RAMAN, FT-IR and FT-NIR) methods reflect the information from the extracts to the chemical composition of the types of wood before the extraction processes. Multivariate data analysis of the spectra was used to obtain a better insight into possible classification methods. Taxifolin and kaempferol were found in larger amount in sound knotwood samples compared to larch wood with high percentage of sapwood and dead knotwood samples. While the extractions of dead knotwood samples yielded more larixol and resin acids than the other larch wood samples used. Based on the chemical composition, three lead compounds were defined for the classification of the different wood raw materials. The vibrational spectroscopy methods were applied to show their potential for a possible distinction of the three types of larch wood tissue. This new insight into the different larch wood extracts will help in the current efforts to use more environmentally friendly raw materials for innovative applications. The connection between the raw materials and extraction yields of the target values is important to transform the results from the laboratory to industry and consumer applications.

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Degradation of Oil Palm Empty Fruit Bunch (OPEFB) in Super-Critical Organic Solvents Affecting the Chemicals Distribution of Bio-Oil

Jurnal Kimia Terapan Indonesia ◽

10.14203/jkti.v19i2.357 ◽

2018 ◽

Vol 19 (2) ◽

pp. 62-72

Author(s):

Rakhman Sarwono ◽

Saepulloh Saepulloh ◽

Brayen Brayen ◽

Andreas Andreas ◽

Yeyen Maryani

Keyword(s):

Chemical Composition ◽

Organic Acid ◽

Organic Solvents ◽

Oil Palm ◽

Chemical Compositions ◽

Empty Fruit Bunch ◽

Liquid Ratio ◽

Bio Oil ◽

Liquid Products ◽

Solid Liquid

Hydrothermal liquefaction (HTL) of oil palm empty fruit bunch (OPEFB) in different organic solvents (methanol, ethanol, acetone, toluene and hexane) to produce bio-oil were comparatively investigated. Experiments were carried out in an autoclave at different temperature of 300, 350 and 400 oC with a fixed solid/liquid ratio of 4 gram in 50 mL solvent, without catalysts and reaction time of 5 hours. The liquid products were analyzed using GCMS to determine the chemical composition. Result showed that the chemical compositions were greatly affected by the solvent types. Each solvent has a major component in bio-oil products. The major compounds resulted from methanol and ethanol solvent were ketones/others. The major compounds resulted from toluene and hexane solvents were organic acid, which favoured high temperature. Meanwhile, esters and organic acid were the major products from acetone solvents. Temperature operation resulted more variations in the chemical composition and the percentages of the bio-oil.

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Influence of Extraction Conditions on Chemical Composition and Thermal Properties of Chestnut Wood Extracts as Tannin Feedstock

ACS Sustainable Chemistry & Engineering ◽

10.1021/acssuschemeng.9b03000 ◽

2019 ◽

Vol 7 (20) ◽

pp. 17047-17054 ◽

Cited By ~ 3

Author(s):

Valeriia Karaseva ◽

Anne Bergeret ◽

Clément Lacoste ◽

Laurent Ferry ◽

Hélène Fulcrand

Keyword(s):

Thermal Properties ◽

Chemical Composition ◽

Wood Extracts ◽

Chestnut Wood

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Antioxidant activity and chemical composition of Juniperus excelsa ssp. polycarpos wood extracts

Natural Product Research ◽

10.1080/14786419.2016.1209666 ◽

2016 ◽

Vol 31 (6) ◽

pp. 681-685 ◽

Cited By ~ 4

Author(s):

S. K. Hosseinihashemi ◽

A. Dadpour ◽

A. Lashgari

Keyword(s):

Antioxidant Activity ◽

Chemical Composition ◽

Juniperus Excelsa ◽

Wood Extracts

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Chemical composition, oviposition deterrent and larvicidal activities of the wood extracts of Tabebuia avellanedae from the Cerrado of Brazil

Journal of Medicinal Plants Research ◽

10.5897/jmpr2018.6650 ◽

2018 ◽

Vol 12 (25) ◽

pp. 404-414

Author(s):

Cibene Moreira Borges Jaqueline ◽

Alves Pereira e Silva Eder ◽

Castro Alves de Barros Tarcísio ◽

Mendes Soares Ilsamar ◽

Donizeti Ascencio Sergio ◽

...

Keyword(s):

Chemical Composition ◽

Oviposition Deterrent ◽

Wood Extracts ◽

Larvicidal Activities

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The Origin of the Moon

Symposium - International Astronomical Union ◽

10.1017/s0074180900178209 ◽

1962 ◽

Vol 14 ◽

pp. 149-155 ◽

Cited By ~ 1

Author(s):

E. L. Ruskol

Keyword(s):

Chemical Composition ◽

Solar System ◽

The Moon ◽

The Earth ◽

The Difference ◽

Origin Of The Moon

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.

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On the Inhomogeneity of Chemical Composition over the Surface of 21 Per

International Astronomical Union Colloquium ◽

10.1017/s0252921100080659 ◽

1976 ◽

Vol 32 ◽

pp. 343-349

Author(s):

Yu.V. Glagolevsky ◽

K.I. Kozlova ◽

V.S. Lebedev ◽

N.S. Polosukhina

Keyword(s):

Chemical Composition ◽

Spectral Line ◽

Variable Star ◽

Radial Velocities ◽

Crimean Astrophysical Observatory ◽

Line Intensities ◽

Magnetic Variable

SummaryThe magnetic variable star 21 Per has been studied from 4 and 8 Å/mm spectra obtained with the 2.6 - meter reflector of the Crimean Astrophysical Observatory. Spectral line intensities (Wλ) and radial velocities (Vr) have been measured.

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Structural Studies on Mitotic Spindle Fibres

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100070345 ◽

1978 ◽

Vol 36 (3) ◽

pp. 615-626

Author(s):

J.R. Mcintosh

Keyword(s):

Chemical Composition ◽

Mitotic Spindle ◽

Structural Studies ◽

Mitotic Apparatus ◽

Chemical Studies ◽

Medical Interest ◽

Spindle Fibres

The mitotic apparatus is a structure of obvious biological and medical interest, but it has proved to be a difficult cellular machine to understand. The chemical composition of the spindle is only slightly elucidated, largely because of the difficulties in preparing useful isolates of the structure. Chemical studies of the mitotic spindle have been reviewed elsewhere (Mcintosh, 1977), and will not be discussed further here. One would think that structural studies on the mitotic apparatus (MA) in situ would be straightforward, but even with this approach there is some disagreement in the results obtained with various methods and by different investigators. In this paper I will review briefly the approaches which have been used in structural studies of the MA, pointing out the strengths and problems of each approach. I will summarize the principal findings of the different methods, and identify what seem to be fruitful avenues for further work.

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