Journal ArticleDOI
Components of Cunninghamia lanceolata Heartwood Extracts
Jing Wang,Jian Li,Shujun Li +2 more
Reads0
Chats0
TLDR
In this paper, different Cunninghamia lanceolata heartwood extracts were studied and the components of the extracts were identified by Gas chromatography-mass spectrometry (GC-MS), Fourier transform infrared spectroscopy (FTIR) and high performance liquid chromatography (HPLC).Abstract:
China-fir (Cunninghamia lanceolata) has a reputation for producing naturally durable heartwood. This species is native in China and has been extensive planted there. Mainly, extractives are responsible for the wood resistance to decay fungi. Compared with the number of studies on China fir focused only on essential oil, studies on other China fir wood extracts is few. In this report, different Cunninghamia lanceolata heartwood extracts were studied. Ground wood was sequentially extracted by solvents with different polarities, hexane, ethyl acetate and methanol. The components of the extracts were identified by Gas chromatography-mass spectrometry (GC-MS), Fourier transform infrared spectroscopy (FTIR) and high performance liquid chromatography (HPLC). Both of FTIR and HPLC revealed that the hexane extract was primarily aliphatic compounds, the methanol extract was rich in phenols in nature and the ethyl acetate extract contained phenols and aliphatic compounds. The GC-MS analysis of the hexane extract and the ethyl acetate extract led to the identification and quantification of a total of 16 components accounting for 48.29% of the hexane extract and 18 components accounting for 66.06% of the ethyl acetate extract. Total phenolic contents (TPCs) and antioxidant capacity of the ethyl acetate extract and the methanol extract were evaluated using the Folin–Ciocalteau colorimetric method and DPPH· assay, respectively. TPCs analysis showed that phenols took up 6.66 % of the ethyl acetate extract and 22.8% of the methanol extract. ED50 values of the ethyl acetate extract and the methanol extract were 4.25 mg mL-1 and 0.19 mg mL-1, respectively. When the methanol extract of 0.145 mg mL-1, its percent DPPH· remaining at steady state (57.92%) was close to that of butylated hydroxytoluene (BHT) (48.5%).read more
Citations
More filters
Journal ArticleDOI
Comparison of changes in micropores and mesopores in the wood cell walls of sapwood and heartwood
TL;DR: In this paper, the size distribution of micropores and mesopores within the wood cell walls between sapwood and heartwood was investigated using nitrogen adsorption method and to find out implications for the biological durability and further processing such as in drying and preservation treatment.
Journal ArticleDOI
Changes in the properties of wood cell walls during the transformation from sapwood to heartwood
TL;DR: In this article, the chemical, viscoelastic and hygroscopic properties of Chinese fir cell walls during the transition from sapwood to heartwood were studied to provide insights into the formation of heartwood.
Proceedings ArticleDOI
The mathematical modeling of the wood greenery extraction processes
TL;DR: In this article, the results of research aimed at rational use of forest waste -wood greenery is presented, where the technology of extraction with saturated steam of high pressure which allows increasing the yield of essential oils without compromising their quality is offered.
Journal ArticleDOI
Differences in the viscoelastic properties between earlywood and latewood in the growth rings of Chinese fir as analyzed by dynamic mechanical analysis (DMA) in the temperature range between −120°C and 120°C
TL;DR: In this paper, Wang et al. measured absolute dry density, percentage of tracheid cell wall, microfibril angle (MFA), modulus of elasticity (MOE), storage modulus (E′) and loss modulus(E″) within different growth rings of Chinese fir, and found that the MOE and E′ increased with increasing tree age.
References
More filters
Book ChapterDOI
Analysis of total phenols and other oxidation substrates and antioxidants by means of folin-ciocalteu reagent
TL;DR: Aggregate analysis of this type is an important supplement to and often more informative than reems of data difficult to summarize from various techniques, such as high-performance liquid chromatography (HPLC) that separate a large number of individual compounds.
Journal ArticleDOI
Radical scavenging ability of polyphenolic compounds towards DPPH free radical.
D. Villaño,M.S. Fernández-Pachón,María Luisa Moyá,Ana M. Troncoso,María Carmen García-Parrilla +4 more
TL;DR: Free radical scavenging activity of different polyphenolic compounds commonly present in wine has been evaluated using DPPH method and compounds as kaempferol, with a high EC(50) value, shows the highest AE value of the phenolic compounds tested, due to its fast rate of reaction, what is of great biological importance.
Journal ArticleDOI
Interaction of flavonoids with 1,1-diphenyl-2-picrylhydrazyl free radical, liposomal membranes and soybean lipoxygenase-1
A.K. Ratty,J. Sunamoto,N.P. Das +2 more
TL;DR: It is suggested that the DPPH free radical abstracts the phenolic hydrogen of the flavonoid molecule and that this could be the general mechanism of the scavenging action of the antiperoxidative flavonoids.
Journal ArticleDOI
Antioxidant and antimicrobial properties of Moltkia petraea (Tratt.) Griseb. flower, leaf and stem infusions.
Marijana Zovko Končić,D Kremer,Jiří Grúz,Miroslav Strnad,Bisevac G,Ivan Kosalec,Dunja Šamec,Jasenka Piljac-Zegarac,Ksenija Karlović +8 more
TL;DR: The leaf extracts from Snijeznica demonstrated superior antioxidant activity in most of the assays, while the stem extract from the same locality was the most effective Fe(2+) ion chelator.
Journal ArticleDOI
Chemical composition and antifungal activity of essential oil isolated from Chamaecyparis formosensis Matsum. wood
Sheng-Yang Wang,Chi-Lin Wu,Fang-Hua Chu,Shih-Chang Chien,Yueh-Hsiung Kuo,Lie-Fen Shyur,Shang-Tzen Chang +6 more
TL;DR: The chemical composition of the essential oil of Chamaecyparis formosensis wood has been examined in this paper, where GCMS data and retention indices for reference samples were used to identify 32 constituents.
Related Papers (5)
Influence of Different Extraction Solvents on Lipophilic Extractives of Acacia Hybrid in Different Wood Portions
Lo Ket Soon,Liew Kang Chiang +1 more