Analysis of Chemical Composition of Extractives by Acetone and the Chromatic Aberration of Teak (Tectona Grandis L.F.) from China

Qiu, Hongyun; Liu, Ru; Ling, Liansheng

doi:10.3390/molecules24101989

Cited by 30 publications

(27 citation statements)

References 24 publications

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“…In regards to teak wood, the antimicrobial effect of extracts is well known (Lacret et al 2012, Niamke et al 2012, Aboaba et al 2014, Kopa et al 2014, Paes et al 2015, Brocco et al 2017. Another study very close to the present one (Qiu et al 2019) shows that extracts of teak wood in acetone contains 49 compounds with in-secto-fungic activity, of which the most representative are: 4-tert-butil-2-fenil-fenol, 2-metilantraquinone, and 2,3-dimetil-1,4,4a, 9a-tetrahidro-9,10-antracenedione.…”

Section: Introductionsupporting

confidence: 81%

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

Colbu¹,

Vasilache²,

Earar³

et al. 2021

iForest

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Biogeosciences and Forestry Biogeosciences and Forestry Study on the chemical composition of teak wood extracts in different organic solventsDumitru Eugen Colbu (1) , Ion Sandu (2-3-4) , Viorica Vasilache (2) , Kamel Earar (5) , Elena Daniela Paraschiv (6) , Ioan Gabriel Sandu (7) , Diana Bulgaru Iliescu (6) , Andrei Victor Sandu (7)(8) Teak wood (Tectona grandis Linn F.) is known for its high natural resistance to attack by microorganisms. For this reason, teak wood is used for restoration works. This paper provides an assessment of the extraction capacity of various organic solvents and the chemical and physical-structural characteristics of extracts of teak wood with an age of 40 years. On the basis of literature data, we selected the solvents with potential synergetic activity in preservation treatments. For this purpose we used the SEM-EDX and GC+MS methods, assisted by computerized processing software, and corroborated the data obtained from these two instrumental techniques.

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Section: Introductionsupporting

confidence: 81%

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

Colbu¹,

Vasilache²,

Earar³

et al. 2021

iForest

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“…The chemical composition of the freijó wood was in accordance with tropical hardwoods (Gérard et al 2019;Qiu et al 2019). Similar content levels were observed in 25-30-year old freijó wood from natural forests, except for higher levels of holocellulose (78%) and extractives (7%) (Scatolino et al 2017).…”

Section: Chemical Compositionsupporting

confidence: 71%

Physico-mechanical properties of the wood of freijó, Cordia goeldiana (Boraginacea), produced in a multi-stratified agroforestry system in the southwestern Amazon

et al. 2021

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Agroforestry systems (AFSs) integrate, through sustainable practices, agricultural and forest crops for the production of wood and food, providing environmental services, and conserving biodiversity. The freijó (Cordia goeldiana) has potential for cultivation in the Amazon for timber purposes, but data on the characteristics of its wood produced in AFSs are scarce. Our objective was to determine the physical-mechanical properties and suggest technological applications of freijó wood produced in a multi-stratified AFS established in the state of Rondônia, Brazil in 1996. Agricultural and forest species were established in the AFS in double rows with 5.0-m x 2.5-m spacing. Three 19-year-old freijó trees were harvested for chemical, physical (density and dimensional stability), and mechanical (compression, static bending, Janka hardness, and shear strength) characterization of the wood. The wood presented a chemical composition similar to tropical hardwoods, was moderately heavy (582.63 kg m-3), and had high dimensional stability in comparison with other consecrated woods on the market (longitudinal, radial, and tangential retraction = 0.25, 4.27, and 6.83%, respectively). The values determined for parallel (32.32 MPa) and perpendicular compression (8.02 MPa), specific strength (55.32 MPa kg-1 m-3), parallel (2373.33 N) and perpendicular Janka hardness (2326.67 N), strength to static bending (63.5 MPa), and shear (5.94 MPa) were similar to the values observed in other high-density tropical woods grown in either monoculture plantations or natural forests. The wood under study is suitable for manufacture of high-value-added products, such as fine furniture, residential floors, musical instruments and structural pieces.

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“…[15][16][17][18][19][20],especially as a complement to X-ray structural analysis in understanding the crystal chemistry of uranyl minerals. A lot of researches have reported uranyl minerals identification results by IR spectra [21][22][23]. The Infrared spectrum of tengchongite with in 640cm -1 to 4000cm -1 is shown in Figure 4 in reflection model.…”

Section: Mid-ir Spectroscopymentioning

confidence: 99%

Microscopic Laser Raman and Infrared Spectroscopic Study of Tengchongite

Qiu¹,

Hu²,

Fan³

2020

Preprint

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Tengchongite is a uranyl molybdate uranium mineral and it was found and named by Chen 1985.No more scholars studied on tengchongite after Chen’s work, The identification of this mineral has only been confirmed by single crystal X-ray diffraction. In the paper, micro laser Raman spectroscopy and infrared spectroscopy are used to identify the spectroscopy properties of tengchongite. The studies fill in the gaps of more than 30 years in terms of the molecular spectroscopy research of tengchongite. The mineral has an ideal model of Ca(UO2)6(MoO4)2O5•12H2O its bands attributed to the vibrating units are clearly identified in the Raman spectrum. Symmetric stretching modes at 812 cm-1 and 839 cm-1 are assigned to ν1 (UO2)2+ ,The ν3 antisymmetric stretching modes of (UO2)2+ are observed at 896 cm-1, Symmetric stretching modes at 419-1 and 440 cm-1 are assigned to ν2 (UO2)2+ .Symmetric stretching modes at 919cm-1 are assigned to ν1(MoO4)2-,The ν3 antisymmetric stretching modes of (MoO4)2- are observed at 752 cm-1, the in-plane ν2(MoO4)2-and the out-of-plane ν4(MoO4)2- bending modes are at 169 cm-1 and 254 cm-1. IR spectrum of tengchongite shows the major uranyl band at 858 cm-1 and 693 cm-1, Mo-O bonds are observed at about 985 cm-1 and 780 cm-1, and H2O groups are present with a wide range peaks from 3100 cm-1 to 3500 cm-1 and 1647 cm-1, and the band at 1432.4 cm-1 is probably due to the stretching vibration hydroxyl (OH-1), therefore, tengchongite contains may include hydroxyl and its chemical formula needs to be modified .

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Analysis of Chemical Composition of Extractives by Acetone and the Chromatic Aberration of Teak (Tectona Grandis L.F.) from China

Cited by 30 publications

References 24 publications

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

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

Physico-mechanical properties of the wood of freijó, Cordia goeldiana (Boraginacea), produced in a multi-stratified agroforestry system in the southwestern Amazon

Microscopic Laser Raman and Infrared Spectroscopic Study of Tengchongite

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