The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
Jacqueline Smadja - One of the best experts on this subject based on the ideXlab platform.
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An original solvent free microwave extraction of essential oils from spices
Flavour and Fragrance Journal, 2004Co-Authors: Marie Elisabeth Lucchesi, Farid Chemat, Jacqueline SmadjaAbstract:Attention is drawn to the development of a new and green alternative technique for the extraction of essential oils from spices. Solvent-free microwave extraction (SFME) is a combination of dry distillation and microwave heating without added any solvent or water. SFME and hydrodistillation (HD) were compared for the extraction of essential oil from three spices: ajowan (Carum ajowan, Apiaceae), cumin (Cuminum cyminum, Umbelliferae), star anise (Illicium anisatum, Illiciaceae). Better results have been obtained with the proposed method in terms of rapidity (1 h vs. 8 h), efficiency and no solvent used. Furthermore, the SFME procedure yielded essential oils that could be analysed directly without any preliminary clean-up or solvent exchange steps. Copyright © 2004 John Wiley & Sons, Ltd.
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An original solvent free microwave extraction of essential oils from spices
Flavour and Fragrance Journal, 2004Co-Authors: Marie Elisabeth Lucchesi, Farid Chemat, Jacqueline SmadjaAbstract:Attention is drawn to the development of a new and green alternative technique for the extraction of essential oils from spices. Solvent-free microwave extraction (SFME) is a combination of dry distillation and microwave heating without added any solvent or water. SFME and hydrodistillation (HD) were compared for the extraction of essential oil from three spices: ajowan (Carum ajowan, Apiaceae), cumin (Cuminum cyminum, Umbelliferae), star anise (Illicium anisatum, Illiciaceae). Better results have been obtained with the proposed method in terms of rapidity (1 h vs. 8 h), efficiency and no solvent used. Furthermore, the SFME procedure yielded essential oils that could be analysed directly without any preliminary clean-up or solvent exchange steps.
Marie Elisabeth Lucchesi - One of the best experts on this subject based on the ideXlab platform.
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An original solvent free microwave extraction of essential oils from spices
Flavour and Fragrance Journal, 2004Co-Authors: Marie Elisabeth Lucchesi, Farid Chemat, Jacqueline SmadjaAbstract:Attention is drawn to the development of a new and green alternative technique for the extraction of essential oils from spices. Solvent-free microwave extraction (SFME) is a combination of dry distillation and microwave heating without added any solvent or water. SFME and hydrodistillation (HD) were compared for the extraction of essential oil from three spices: ajowan (Carum ajowan, Apiaceae), cumin (Cuminum cyminum, Umbelliferae), star anise (Illicium anisatum, Illiciaceae). Better results have been obtained with the proposed method in terms of rapidity (1 h vs. 8 h), efficiency and no solvent used. Furthermore, the SFME procedure yielded essential oils that could be analysed directly without any preliminary clean-up or solvent exchange steps. Copyright © 2004 John Wiley & Sons, Ltd.
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An original solvent free microwave extraction of essential oils from spices
Flavour and Fragrance Journal, 2004Co-Authors: Marie Elisabeth Lucchesi, Farid Chemat, Jacqueline SmadjaAbstract:Attention is drawn to the development of a new and green alternative technique for the extraction of essential oils from spices. Solvent-free microwave extraction (SFME) is a combination of dry distillation and microwave heating without added any solvent or water. SFME and hydrodistillation (HD) were compared for the extraction of essential oil from three spices: ajowan (Carum ajowan, Apiaceae), cumin (Cuminum cyminum, Umbelliferae), star anise (Illicium anisatum, Illiciaceae). Better results have been obtained with the proposed method in terms of rapidity (1 h vs. 8 h), efficiency and no solvent used. Furthermore, the SFME procedure yielded essential oils that could be analysed directly without any preliminary clean-up or solvent exchange steps.
Richard M K Saunders - One of the best experts on this subject based on the ideXlab platform.
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A phylogenetic analysis of the Illiciaceae based on sequences of internal transcribed spacers (ITS) of nuclear ribosomal DNA
Plant Systematics and Evolution, 2020Co-Authors: Richard M K Saunders, Meelen ChyeAbstract:Sequences of the internal transcribed spacers (ITS) of nuclear ribosomal DNA were determined for 15 species of Illicium (Illiciaceae) to examine phylogenetic relationships. The ITS trees show a major dichotomy between the two North American species (I. floridanum and I. parviflorum) and the remaining east Asian species. This suggests that the existing division between two sections (sect. Illicium and sect. Cymbostemon) of Illicium based on tepal characters is unnatural. The ITS phylogeny shows congruence with palynology: of the species examined, the three species (I. angustisepalum, I. anisatum and I. fargesii) from sect. Illicium that possess trizonocolpate pollen consistently form a clade, although nesting within a clade consisting of the species of sect. Cymbostemon, which generally have trisyncolpate pollen. The low ITS sequence divergence and the close relationship among east Asian species suggest a recent diversification of this group of species or an unusual slowdown of sequence mutations.link_to_subscribed_fulltex
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a phylogenetic analysis of the Illiciaceae based on sequences of internal transcribed spacers its of nuclear ribosomal dna
Plant Systematics and Evolution, 2000Co-Authors: Richard M K Saunders, Meelen ChyeAbstract:Sequences of the internal transcribed spacers (ITS) of nuclear ribosomal DNA were determined for 15 species ofIllicium (Illiciaceae) to examine phylogenetic relationships. The ITS trees show a major dichotomy between the two North American species (I. floridanum andI. parviflorum) and the remaining east Asian species. This suggests that the existing division between two sections (sect.Illicium and sect.Cymbostemon) ofIllicium based on tepal characters in unnatural. The ITS phylogeny shows congruence with palynology: of the species examined, the three species (I. angustisepalum, I. anisatum andI. fargesii) from sect.Illicium that possess trizonocolpate pollen consistently form a clade, although nesting within a clade consisting of the species of sect.Cymbostemon, which generally have trisyncolpate pollen. The low ITS sequence divergence and the close relationship among east Asian species suggest a recent diversification of this group of species or an unusual slowdown of sequence mutations.
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phytochemistry of illicium dunnianum and the systematic position of the Illiciaceae
Phytochemistry, 1997Co-Authors: Laiking Sy, Richard M K Saunders, Geoffrey D BrownAbstract:Detailed chemical investigation of a dichloromethane extract of Illicium dunnianum yielded six phenylpropanoids (two of which, 1-[(3-methylbut-2-enyl)oxy]-2-methoxy-4-(prop-1-en-3-ol)benzene and 1,2-(methylenedioxy)-4-(propan-1,2-diol)benzene, were novel), five known neolignans, three known cycloartane triterpenes and a novel ring-A cleaved cycloartane, 3,4-seco-(24Z)-cycloart-4(28),24-diene-3,26-dioic acid 3-methyl ester. The significance of these chemical findings is assessed in the context of the historical debate concerning the systematic position and phylogenetic relationships of the genus.
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systematics of the genusilliciuml Illiciaceae in malesia
Botanical Journal of the Linnean Society, 1995Co-Authors: Richard M K SaundersAbstract:The classification of the genusIlliciumL. (Illiciaceae) is revised within the Malesian phytogeographical region, using multivariate statistical analyses as required. Seven species are recognized,viz. I. kinabaluenseA.C. Sm. (Sabah),I. peninsulareA.C. Sm. (Malay Peninsula),I. philippinenseMerr. (Philippines),I. ridleyanumA.C. Sm. (Malay Peninsula),I. stapfiiMerr. (Sabah and Sarawak),I. sumatranumA.C. Sm. (Sumatra) andI. tenuifolium(Ridl.) A.C. Sm. (Malay Peninsula, and newly recorded in Sumatra, Sabah and Sarawak).I. cauliflorumMerr. is reduced to synonymy withI. stapfii,and the existing infraspecific classification ofI. tenuifoliumis shown to be invalid. The implications of the present research on the supraspecific classification of the genus are discussed. A key is provided for the identification of taxa, with new taxonomic descriptions.
Farid Chemat - One of the best experts on this subject based on the ideXlab platform.
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An original solvent free microwave extraction of essential oils from spices
Flavour and Fragrance Journal, 2004Co-Authors: Marie Elisabeth Lucchesi, Farid Chemat, Jacqueline SmadjaAbstract:Attention is drawn to the development of a new and green alternative technique for the extraction of essential oils from spices. Solvent-free microwave extraction (SFME) is a combination of dry distillation and microwave heating without added any solvent or water. SFME and hydrodistillation (HD) were compared for the extraction of essential oil from three spices: ajowan (Carum ajowan, Apiaceae), cumin (Cuminum cyminum, Umbelliferae), star anise (Illicium anisatum, Illiciaceae). Better results have been obtained with the proposed method in terms of rapidity (1 h vs. 8 h), efficiency and no solvent used. Furthermore, the SFME procedure yielded essential oils that could be analysed directly without any preliminary clean-up or solvent exchange steps. Copyright © 2004 John Wiley & Sons, Ltd.
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An original solvent free microwave extraction of essential oils from spices
Flavour and Fragrance Journal, 2004Co-Authors: Marie Elisabeth Lucchesi, Farid Chemat, Jacqueline SmadjaAbstract:Attention is drawn to the development of a new and green alternative technique for the extraction of essential oils from spices. Solvent-free microwave extraction (SFME) is a combination of dry distillation and microwave heating without added any solvent or water. SFME and hydrodistillation (HD) were compared for the extraction of essential oil from three spices: ajowan (Carum ajowan, Apiaceae), cumin (Cuminum cyminum, Umbelliferae), star anise (Illicium anisatum, Illiciaceae). Better results have been obtained with the proposed method in terms of rapidity (1 h vs. 8 h), efficiency and no solvent used. Furthermore, the SFME procedure yielded essential oils that could be analysed directly without any preliminary clean-up or solvent exchange steps.
Ashley B Morris - One of the best experts on this subject based on the ideXlab platform.
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clonal structure of wild populations and origins of horticultural stocks of illicium parviflorum Illiciaceae
American Journal of Botany, 2010Co-Authors: Darah L Newell, Ashley B MorrisAbstract: Premise of the study : Habitat fragmentation is often assumed to result in limited genetic diversity across impacted plant communities. Central Florida has undergone extensive anthropogenic changes, while also harboring large numbers of endemic species. In this study, we assessed genetic structure and dependence on clonality in a central Florida endemic, Illicium parvifl orum (Illiciaceae), as well as evaluated genetic diversity of this species in horticultural stocks. Methods : Six sites were sampled across the geographic range of I. parvifl orum . A PCR-based assay using intersimple sequence repeats (ISSRs) was used to assess genetic structure. Key results : Results, based on 26 ISSR loci, suggest that clonal structure plays a role in all populations, with PD values ranging from 0.25 to 0.50. Only two populations exhibited unique genotypes, while the remaining four populations shared genotypes. Horticultural samples all shared one genotype, which can be traced back to a single natural population. Conclusions : Clonal reproduction is an important factor in the maintenance of natural populations of I. parvifl orum , although the degree to which this is true varies by population. Horticultural samples likely represent a single or very few collection events, indicating the need for greater genetic diversity within horticultural stocks. Further analyses using microsatellites are planned to confi rm these results.
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Phylogeny and Divergence Time Estimation in Illicium with Implications for New World Biogeography
Systematic Botany, 2007Co-Authors: Ashley B Morris, Douglas E Soltis, Walter S. Judd, Charles D. Bell, Joshua W. Clayton, Pamela S SoltisAbstract:Illiciaceae comprise the single genus, Illicium, and approximately 30-40 species distributed in southern and eastern Asia, the southeastern United States, Mexico, and the Greater Antilles. On the basis of perianth morphology, current taxonomic treatments recognize two sections that do not correspond to geographic distributions. A recent phylogenetic study using ITS sequences found strong support for separate Old and New World clades, but did not include all New World species. We elaborate on this previous study by including all known New World species of Illicium, as well as additional Asian species, using ITS and the plastid loci trnL, the trnL-F spacer, and trnG. We estimated divergence times within Illicium using penalized likelihood and multiple fossil calibration points. Our results support separate New and Old World clades, and we re-circumscribe current sectional groupings based on these data. The Illicium crown group appears to have arisen during the Cretaceous, with New World extant taxa diversifying as recently as the late Miocene or early Pliocene. These dates are consistent with recent fossil evidence and molecular estimates for minimum ages of the angiosperms, and for timing of diversification events in other ancient groups, such as Nymphaeales and Chloranthaceae.
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A new species of Illicium subsection Parviflora (Illiciaceae) from the Massif de la Hotte, Haiti
Brittonia, 2004Co-Authors: Angela Guerrero, Walter S. Judd, Ashley B MorrisAbstract:Illicium hottense , a new species, is here described from the floristically diverse Massif de la Hotte of southern Haiti. It is compared to related species, especially I. ekmanii , with which it has previously been confused. Illicium hottense and I. ekmanii are members of Illicium subsection Parviflora , a group that comprises four species, all endemic to peninsular Florida ( I. parviflorum ) or the Greater Antilles: Cuba ( I. cubense ) and Hispaniola ( I. ekmanii , and I. hottense ). The subsection is characterized by its distinctive laminar-carnose, ovoid stamens; all have trisyncolpate pollen. Illicium hottense is similar to I. ekmanii and I. parviflorum in having flowers with ten to thirteen carpels and six to less commonly eight stamens, but differs from both in its strongly papillose outer tepals and consistently acute leaves. In addition, its leaves lack the strong anise fragrance of I. parviflorum . Finally, molecular data provide support for recognizing I. hottense as a species distinct from I. ekmanii .
