Chemical Characterization of the Essential Oils of Eucalyptus.grandis×Eucalyptus.urophylla Hybrids and Six Pure Eucalyptus species Grown in Guangxi (China)

2014 ◽  
Vol 1033-1034 ◽  
pp. 200-208
Author(s):  
Feng Lai Lu ◽  
Yue Yuan Chen ◽  
Jiao Hong Wei ◽  
Yong Lin Huang ◽  
Dian Peng Li ◽  
...  
Keyword(s):  
Essential Oils ◽  
Chemical Characterization ◽  
Hierarchical Cluster ◽  
The Other ◽  
Eucalyptus Species ◽  
Oil Composition ◽  
Pure Species ◽  
Species Analysis ◽  
Total Oil

Hydrodistillation of the fresh leaves of E.grandis×E.urophylla hybrids and pure species E.grandis, E.urophylla, E.pellita, E.camaldulensis, E. dunni, and E.saligna collected from the trees grown in Guangxi Huangmian Forest (China), afforded essential oils in yields varying from 0.24±0.15% to 5.36±0.28%, according to the species. Analysis by GC (FID) and GC/MS allowed the identification of 67 compounds, representing 82.55% to 91.03% of the total oil composition. The dominant compounds were 1,8-cineole in E.saligna, E.urophylla, E.grandis×E.urophylla, E.grandis, E.pellita and E. dunni (67.48, 57.12, 48.21, 23.64, 20.34, 20.22%), p-Cymene in E.camaldulensis,E. dunni and E.grandis(21.32, 14.74, 13.38%), α-pinene in E.grandis and E.grandis×E.urophylla (21.77, 15.55%), α-terpinene in E. dunni and E.grandis (17.96, 9.35%), α-terpineol in E.pellita and E.saligna (19.24,11.54%), respectively. Hierarchical Cluster Analysis separated the characterized essential oils into two groups, each constituting a chemotype. E.grandis×E.urophylla and E.urophylla were classified in the same group, while E.grandis in the other.

Structural role of copper in the minerals of the pearceite-polybasite group: the case of the new minerals cupropearceite and cupropolybasite

2007 ◽  
Vol 71 (06) ◽  
pp. 641-650 ◽  
Author(s):  
L. Bindi ◽  
M. Evain ◽  
P. G. Spry ◽  
K. T. Tait ◽  
S. Menchetti
Keyword(s):  
Chemical Characterization ◽  
Sample Space ◽  
The Other ◽  
Crystal Chemical ◽  
Structural Position ◽  
Space Group ◽  
Cu Content ◽  
Own Name

Abstract The pearceite-polybasite group of minerals, general formula [M6T2S7][Ag9CuS4] with M = Ag, Cu; and T = As, Sb, show a crystal structure which can be described as the succession, along the c axis, of two pseudo-layer modules: a [M6T2S7]2– A module layer and a [Ag9CuS4]2+ B module layer. Copper is present in one structural position of the B module layer and replaces Ag in the only fully occupied M position of the A module layer. When the Cu content is >4.00 a.p.f.u., the structural position of the A module layer becomes Cu-dominant and, consequently, the mineral deserves its own name. In this paper we report the crystal-chemical characterization of two Cu-rich members exhibiting the 111 unitcell type (corresponding to the Tac polytype). One sample (space group (P )m1, a 7.3218(8), c 11.8877(13) Å, V 551.90(10) Å3, Z = 1) having As >Sb and with the structural position of the A module layer dominated by Cu, has been named cupropearceite and the other sample (space group (P3̄)m1, a 7.3277(3), c 11.7752(6) Å, V 547.56(8) Å3, Z = 1) having Sb >As has been named cupropolybasite. Both the new minerals and mineral names have been approved by the IMA-CNMNC.

Chemical Characterization of Euphorbia heterophylla L. Essential Oils and Their Antioxidant Activity and Allelopathic Potential on Cenchrus echinatus L.

2019 ◽  
Vol 16 (5) ◽  
pp. e1900051 ◽  
Author(s):  
Abdelsamed I. Elshamy ◽  
Ahmed M. Abd‐ElGawad ◽  
Abd El‐Nasser G. El Gendy ◽  
Abdulaziz M. Assaeed
Keyword(s):  
Antioxidant Activity ◽  
Essential Oils ◽  
Chemical Characterization ◽  
Allelopathic Potential

Fine-grained weathering products in waste disposal from two sulphide mines in the northern Apennines, Italy

Clay Minerals ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 423-433 ◽  
Author(s):  
E. Dinelli ◽  
N. Morandi ◽  
F. Tateo
Keyword(s):  
Acidic Solution ◽  
Chemical Characterization ◽  
Northern Apennines ◽  
The Other ◽  
Blue Colour ◽  
Fine Grained ◽  
Surrounding Environment ◽  
Waste Rock Piles ◽  
Cu And Zn

AbstractFrom mineralogical and chemical characterization of two waste-rock piles from Vigonzano and Libiola sulphide mines in the northern Apennines, two types of fine-grained weathering products were recognized, One, from the Vigonzano mine, has a typical blue colour and consists of the Cu-Al sulphate of the woodwardite group. Its formation is related to an alkaline geochemical barrier, it is rather stable in acidic solution, and it controls Cu and Zn dispersion in the surrounding environment. The other group of sediments has a typical ochreous colour. Vigonzano samples consist mostly of goethite, whereas ferrihydrite is abundant in the Libiola sample. The ochreous sediments are enriched in Co, As, Mo, Se and Mn, thus significantly reducing the potential environmental hazard of the site, whereas solubility tests indicated possible problems due to AI dissolution at Libiola.

Chemical Characterization of Essential Oils of Senecio glaucus ssp. Coronopifolius (Maire) Alexander and Ridolfia segetum (L.) Moris Growing in Morocco

2020 ◽  
Vol 23 (5) ◽  
pp. 918-930
Author(s):  
Khadija Basaid ◽  
Bouchra Chebli ◽  
Rachid Bouharroud ◽  
James Nicholas Furze ◽  
Alessandra Lopes de Oliveira ◽  
...  
Keyword(s):  
Essential Oils ◽  
Chemical Characterization

Variation in Australian populations of Halfordia kendack s.l. (Rutaceae): evidence from leaf essential oils

2004 ◽  
Vol 17 (6) ◽  
pp. 571 ◽  
Author(s):  
Paul I. Forster ◽  
Joseph J. Brophy ◽  
Robert J. Goldsack
Keyword(s):  
Essential Oils ◽  
Species Distribution ◽  
Methyl Eugenol ◽  
The Other ◽  
Oil Composition ◽  
Altitudinal Range ◽  
Leaf Oil ◽  
Variable Species ◽  
Low Altitude

The leaf oils of Halfordia kendack (Montrouz.) Guillaumin s.l. from locations throughout its range in Australia were investigated to ascertain if the disjunct nature of the species' distribution affected their composition and whether any variation detected supported the recognition of a second species (H. scleroxyla F.Muell.). While three groups of populations could be classified on the basis of leaf oil composition, these groups were not associated with geographic locality or altitudinal range and habitat. It was found that plants from low altitude sites in north Queensland all produced leaf oils that contained the aromatic ethers methyl eugenol and elemicin in variable amounts, included in an otherwise terpenoid oil. Plants from the other three areas examined; north Queensland montane sites, south-east Queensland low altitude and south-east Queensland montane sites, all produced leaf oils which were terpenoid in nature and contained no aromatic ethers. This lack of correlation in leaf oil composition with locality or habitat would lend support to the proposition that Halfordia exists in only one variable species in Australia.

scholarly journals Acclimatization study of Tagetes lucida L. in Egypt and the chemical characterization of its essential oils

2017 ◽  
Vol 31 (13) ◽  
pp. 1509-1517 ◽  
Author(s):  
Elasyed A. Omer ◽  
Saber F. Hendawy ◽  
Rasha F. Ismail ◽  
Giacomo L. Petretto ◽  
Jonathan P. Rourke ◽  
...  
Keyword(s):  
Essential Oils ◽  
Chemical Characterization

scholarly journals Chemical characterization of the essential oils from leaves of mandarins Sunki, Cleopatra and their hybrids

2014 ◽  
Vol 27 (1) ◽  
pp. 1-8
Author(s):  
Josiana Z. Santos ◽  
Lucas A.H. Almeida ◽  
Walter S. Soares Filho ◽  
Humberto R. Bizzo ◽  
Marcelly Cristina da Silva Santos ◽  
...  
Keyword(s):  
Essential Oils ◽  
Chemical Characterization

scholarly journals Investigation of Origanum libanoticum Essential Oils Chemical Polymorphism by Independent Components Analysis (ICA)

2018 ◽  
Vol 13 (12) ◽  
pp. 1934578X1801301
Author(s):  
Raviella Zgheib ◽  
Sylvain Chaillou ◽  
Naim Ouaini ◽  
Douglas N. Rutledge ◽  
Didier Stien ◽  
...  
Keyword(s):  
Essential Oils ◽  
Annual Variation ◽  
Drying Method ◽  
Oil Composition ◽  
Flowering Stage ◽  
Independent Components Analysis ◽  
Independent Components ◽  
Chemical Polymorphism ◽  
Components Analysis ◽  
Total Oil

The essential oils obtained from Origanum libanoticum Boiss., a plant endemic to Lebanon, were analyzed by GC/MS. Seventy compounds were identified, covering till 99.8% of the total oil composition. All samples were p-cymene and/or β-caryophyllene chemotype, with variable percentage of other compounds such as α-pinene, myrcene, α-phellandrene, limonene, etc. Compared to traditional drying method, lyophilized samples provided the highest essential oil (EO) yields and yields were higher at flowering stage (Chouwen: 0.33% in 2013 and 0.32% in 2014; Qartaba: 0.27% in 2013 and 0.37% in 2014). According to independent components analysis (ICA), date and site of harvest, altitude and drying technique had no effect on the variation of O. libanoticum EO chemical composition. An annual variation of EOs composition was observed since a particular variation in some major components concentration was revealed monthly and annually between 2013 and 2014.

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