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Journal articles on the topic 'Santalenes'

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Author: Grafiati

Published: 4 June 2021

Last updated: 19 February 2022

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1

Yin, Jun-Lin, and Woon-Seng Wong. "Production of santalenes and bergamotene in Nicotiana tabacum plants." PLOS ONE 14, no. 1 (January 4, 2019): e0203249. http://dx.doi.org/10.1371/journal.pone.0203249.

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2

Cheng, Qingwei, Yuping Xiong, Meiyun Niu, Yueya Zhang, Haifeng Yan, Hanzhi Liang, Beiyi Guo, et al. "Callus of East Indian sandalwood co-cultured with fungus Colletotrichum gloeosporioides accumulates santalenes and bisabolene." Trees 33, no. 1 (September 14, 2018): 305–12. http://dx.doi.org/10.1007/s00468-018-1758-0.

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3

Arai, Yoshitsugu, Masatoshi Yamamoto, and Toru Koizumi. "Enantioselective Synthesis of the Functionalized Bicyclo[2.2.1]heptane Derivatives, Key Intermediates for the Chiral Synthesis of Santalenes and Santalols." Chemistry Letters 15, no. 7 (July 5, 1986): 1225–28. http://dx.doi.org/10.1246/cl.1986.1225.

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4

Daramwar, Pankaj P., Prabhakar Lal Srivastava, Balaraman Priyadarshini, and Hirekodathakallu V. Thulasiram. "Preparative separation of α- and β-santalenes and (Z)-α- and (Z)-β-santalols using silver nitrate-impregnated silica gel medium pressure liquid chromatography and analysis of sandalwood oil." Analyst 137, no. 19 (2012): 4564. http://dx.doi.org/10.1039/c2an35575b.

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5

Ngo, Koon-Sin, and Geoffrey D. Brown. "Autoxidation of α-santalene." Journal of Chemical Research 2000, no. 2 (February 2000): 68–70. http://dx.doi.org/10.3184/030823400103166599.

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Fifteen compounds (2 – 11) have been isolated from the spontaneous slow autoxidation of the tri-substituted double bond in the side-chain of the tricyclic sesquiterpene α-santalene; most of these compounds have also been reported as natural products.

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6

Unnikrishnan, P. A., and P. A. Vatakencherry. "Syntheses of epi-β-Santalene, β-Santalene and an Isomer of β-Santalene with 4-Methyl-4-pentenyl Side Chain." Synthetic Communications 22, no. 22 (December 1992): 3159–68. http://dx.doi.org/10.1080/00397919208021129.

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7

UNNIKRISHNAN, P. A., and P. A. VATAKENCHERRY. "ChemInform Abstract: Synthesis of epi-β-Santalene (I), β-Santalene (II), and an Isomer (III) of β-Santalene with 4-Methyl-4-pentenyl Side Chain." ChemInform 24, no. 18 (August 20, 2010): no. http://dx.doi.org/10.1002/chin.199318271.

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8

Takano, Seiichi, Kohei Inomata, Ayako Kurotaki, Takehiko Ohkawa, and Kunio Ogasawara. "Enantiodivergent route to both enantiomers of β-santalene and epi-β-santalene from a single chiral template." J. Chem. Soc., Chem. Commun., no. 22 (1987): 1720–22. http://dx.doi.org/10.1039/c39870001720.

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9

Guo, Shan-Shan, Yang Wang, Zhen-Yang Chen, Zhe Zhang, Ju-Qin Cao, Xue Pang, Zhu-Feng Geng, and Shu-Shan Du. "Essential Oils from Clausena Species in China: Santalene Sesquiterpenes Resource and Toxicity against Liposcelis bostrychophila." Journal of Chemistry 2018 (November 19, 2018): 1–8. http://dx.doi.org/10.1155/2018/7813675.

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To develop natural product resources from the Clausena genus (Rutaceae), the essential oils (EOs) from four Clausena plants (Clausena excavata, C. lansium, C. emarginata, and C. dunniana) were analyzed by GC-MS. Their lethal (contact toxicity) and sublethal effects (repellency) against Liposcelis bostrychophila (LB) adults were also evaluated. Santalene sesquiterpene was the precursor substance of santalol, a valuable perfumery. It was found that plenty of α-santalol (31.7%) and α-santalane (19.5%) contained in C. lansium from Guangxi Province and α-santalene (1.5%) existed in C. emarginata. Contact toxicity of the four EOs was observed, especially C. dunniana (LD50 = 37.26 µg/cm2). Santalol (LD50 = 30.26 µg/cm2) and estragole (LD50 = 30.22 µg/cm2) were the two most toxic compounds. In repellency assays, C. excavate, C. lansium, and C. emarginata exhibited repellent effect at the dose of 63.17 nL/cm2 2 h after exposure (percentage repellencies were 100%, 98%, and 96%, respectively). Four Clausena EOs and santalol had an excellent potential for application in the management of LB. Clausena plants could be further developed to find more resources of natural products.

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10

Kelsey, Rick G., Ovid McCuistion, and Joe Karchesy. "Bark and Leaf Essential Oil of Umbellularia californica, California Bay Laurel, from Oregon." Natural Product Communications 2, no. 7 (July 2007): 1934578X0700200. http://dx.doi.org/10.1177/1934578x0700200715.

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The bark and leaf essential oil of Umbellularia californica (Hook. & Arn.) Nutt. from west central Oregon, USA, was isolated by steam distillation and the chemical composition analyzed by GC-FID and GC-MS. The three major components in bark oil were 1,8-cineole (36.0%), α-santalene (9.3), and α-terpineol (6.9%), while those in leaf oil were umbellulone (41.0%), 1,8-cineole (22.0%) and sabinene (10.2%).

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11

Saito, Masanori, Mitsuhiro Kawamura, and Kunio Ogasawara. "Diastereo and enantio-controlled synthesis of sandalwood constituents (-)-β-santalene and (+)-epi-β-santalene starting from the same (+)-norcamphor." Tetrahedron Letters 36, no. 49 (December 1995): 9003–6. http://dx.doi.org/10.1016/0040-4039(95)01971-j.

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12

Ahmed, Muniruddin, Bidyut Kanti Datta, A. S. S. Rouf, and Jasmin Jakupovic. "Flavone and α-santalene derivatives from Polygonum flaccidum." Phytochemistry 30, no. 9 (January 1991): 3155–56. http://dx.doi.org/10.1016/s0031-9422(00)98279-7.

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13

SAITO, M., M. KAWAMURA, and K. OGASAWARA. "ChemInform Abstract: Diastereo- and Enantio-Controlled Synthesis of Sandalwood Constituents (-)-β-Santalene and (+)-Epi-β-santalene Starting from the Same (+)-Norcamphor." ChemInform 27, no. 13 (August 12, 2010): no. http://dx.doi.org/10.1002/chin.199613213.

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14

Travaini, Lucia. "Les frontières de l'Éternité ? Le cas d'un nom de monnaie : santalene." Revue numismatique 6, no. 164 (2008): 169–83. http://dx.doi.org/10.3406/numi.2008.2849.

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15

Unnikrishnan, P. A. "A HIGHLY STEREOSELECTIVE TRANSFORMATION OF β-SANTALENE TO (E)-β-SANTALOL." Organic Preparations and Procedures International 26, no. 4 (August 1994): 488–91. http://dx.doi.org/10.1080/00304949409458045.

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16

Hua, Gaoqun, Yiling Hu, Chunyu Yang, Dazhi Liu, Zhuo Mao, Lixin Zhang, and Yan Zhang. "Characterization of santalene synthases using an inorganic pyrophosphatase coupled colorimetric assay." Analytical Biochemistry 547 (April 2018): 26–36. http://dx.doi.org/10.1016/j.ab.2018.02.002.

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17

Muñoz, Orlando, Phlippe Christen, Silvian Cretton, Alejandro F. Barrero, Armando Lara, and M. Mar Herrador. "Comparison of the Essential Oils of Leaves and Stem Bark from Two Different Populations of Drimys Winteri a Chilean Herbal Medicine." Natural Product Communications 6, no. 6 (June 2011): 1934578X1100600. http://dx.doi.org/10.1177/1934578x1100600630.

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The chemical composition of the essential oils obtained by hydrodistillation of stem bark and leaves of Drimys winteri J.R. et G. Foster var. chilensis /DC A. Gray ( Winteraceae) from Chiloe Island (ID) and Continental Chile (Santiago) (CD) were studied by GC and GC/MS. Sesquiterpene hydrocarbons constituted the main chemical groups in the stem bark oils, with α-santalene, trans-β-bergamotene and curcumenes as the major components. Monoterpenes constituted the main chemical groups in the leaves of Island plants with α-pinene (23.1%) β-pinene (43.6%) and linalool (10.5%) as the main components whereas sesquiterpenes (germacrene D 17.6%) and phenylpropanoids (safrole 20.8%) are the most abundant in the leaves of Continental plants.

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18

Verdan, Maria Helena, Carlos Augusto Ehrenfried, Dilamara Riva Scharf, Armando Carlos Cervi, Marcos José Salvador, Andersson Barison, and Maria Elida A. Stefanello. "Chemical Constituents from Sinningia canescens and S. warmingii." Natural Product Communications 9, no. 10 (October 2014): 1934578X1400901. http://dx.doi.org/10.1177/1934578x1400901033.

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A new naphthoquinone, 6-methoxy-7-hydroxy-α-dunnione (1), along with four known compounds (2, 4, 10, and 11) were isolated from Snningia canescens (Mart.) Wiehler tubers, while S. warmingii (Hiern.) Chautems furnished eight known compounds (3–10). The known compounds were identified as 7-hydroxy-α-dunnione (2), lapachenole (3), tectoquinone (4), 7-methoxytectoquinone (5), 1-hydroxytectoquinone (6), 7-hydroxytectoquinone (7), aggregatin C (8), aggregatin D (9), halleridone (10), and cedrol (11). In addition, S. canescens yielded a volatile fraction, which was analyzed by GC/FID and GC/MS. This fraction was constituted mainly by sesquiterpene hydrocarbons (82.6%). The major components were β-santalene (14.6%), β-cedrene (10.4%), and trans-cadina-1(6)-4-diene (10.0%).

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19

Jia, Dan, Shuo Xu, Jie Sun, Chuanbo Zhang, Dashuai Li, and Wenyu Lu. "Yarrowia lipolytica construction for heterologous synthesis of α-santalene and fermentation optimization." Applied Microbiology and Biotechnology 103, no. 8 (March 12, 2019): 3511–20. http://dx.doi.org/10.1007/s00253-019-09735-w.

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20

Weston, Roderick J., and Gerald J. Smith. "Sesquiterpenes from the Inner Bark of the Silver Birch and the Paper Birch." Natural Product Communications 7, no. 2 (February 2012): 1934578X1200700. http://dx.doi.org/10.1177/1934578x1200700202.

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The compositions of the mixtures of sesquiterpenoids, largely hydrocarbons that were found in the inner bark of the silver birch, Betula pendula Roth and the paper birch, Betula papyrifera Marshall, grown in New Zealand were analyzed by SPME-GCMS. The major components of the volatile oil from the inner bark of B. pendula were trans α-bergamotene (31%) and α-santalene (19%). This composition was quite different from that of the oil from the branches, buds and leaves of the same species from Turkey, but was very similar to that of the oil from the bark of B. pubescens from Russia. The major components of the oil from the inner bark of B. papyrifera were trans α-bergamotene (18%), ar-curcumene (12%), E-β-farnesene (12%), Z-β-farnesene (10%) and cis-α-bergamotene (8%).

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21

UNNIKRISHNAN, P. A. "ChemInform Abstract: A Highly Stereoselective Transformation of β-Santalene into (E)-. beta.-Santalol." ChemInform 26, no. 5 (August 18, 2010): no. http://dx.doi.org/10.1002/chin.199505224.

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22

Tippmann, Stefan, Gionata Scalcinati, Verena Siewers, and Jens Nielsen. "Production of farnesene and santalene bySaccharomyces cerevisiaeusing fed-batch cultivations withRQ-controlled feed." Biotechnology and Bioengineering 113, no. 1 (September 2, 2015): 72–81. http://dx.doi.org/10.1002/bit.25683.

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23

Thang, Tran D., Do N. Dai, Tran M. Hoi, and Isiaka A. Ogunwande. "Essential Oils from Five Species of Annonaceae from Vietnam." Natural Product Communications 8, no. 2 (February 2013): 1934578X1300800. http://dx.doi.org/10.1177/1934578x1300800228.

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The essential oils obtained by hydrodistillation from the leaves of five species of Annonaceace grown in Vietnam were analyzed by gas chromatography (GC) coupled with mass spectrometry (GC/MS). The main constituents of Artabotrys hongkongensis Hance were the sesquiterpenes spathulenol (13.1%), β-caryophyllene (6.6%), γ-elemene (6.3%) and δ-cadinene (6.3%). β-Caryophyllene (12.1%), bicycloelemene (11.2%) and bicyclogermacrene (11.6%) were the predominant components of the oil of Melodorum fruticosum Lour, whereas the oil of Polyalthia longifolia var. pendula Hort was comprised mainly of β-caryophyllene (30.0%), α-zingiberene (21.7%), aromadendrene (15.2%) and β-selinene (9.1%). The main constituents of Fissistigma maclurei Merr. were germacrene D (26.1%), α-terpinene (8.2%), spathulenol (10.0%), and bicyclogermacrene (6.6%), while α-santalene (14.3%), β-caryophyllene (6.3%), terpinen-4-ol (6.3%), caryophyllene oxide (5.7%), trans-α-bergamotene (5.3%) and allo-ocimene (5.3%) were identified in significant quantity from Fissistigma rufinerve (Hook.f. & Thomson) Merr.

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24

Aryal, Hari Prasad, and Usha Budathoki. "Systematics of Nepalese Termitomyces." Our Nature 13, no. 1 (December 27, 2015): 31–44. http://dx.doi.org/10.3126/on.v13i1.14207.

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The genus Termitomyces is obligate symbiont fungus with the termite, which grows on termatoria. This paper highlights new records of Termitomyces aurantiacus (R. Heim) R. Heim, T. badius Otieno, T. le-testui (Pat.) R. Heim, T. microcarpus f. santalensis Heim and T. schimperi (Pat.) R. Heim reported for the first time from Nepal. The collection area lies 26°44'08"-29°06'32"N latitude and 80°18'02"-88°08'27"E longitude within an altitudinal range of 60-3000 msl. The collection during 2010-2012 from reserve forest and the specimens have been deposited in the Natural History Museum (NHM), Tribhuvan University, Kathmandu, Nepal.Our Nature (2015), 13(1): 31-44

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25

Jindal, Garima, and Raghavan B. Sunoj. "Revisiting sesquiterpene biosynthetic pathways leading to santalene and its analogues: a comprehensive mechanistic study." Organic & Biomolecular Chemistry 10, no. 39 (2012): 7996. http://dx.doi.org/10.1039/c2ob26027a.

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26

Kloster, Adriana C., and Silvia C. Gnaedinger. "Coniferous wood of Agathoxylon from the La Matilde Formation, (Middle Jurassic), Santa Cruz, Argentina." Journal of Paleontology 92, no. 4 (April 2, 2018): 546–67. http://dx.doi.org/10.1017/jpa.2017.145.

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AbstractIn this contribution, four species of Agathoxylon are described from the La Matilde Formation, Gran Bajo de San Julián and central and south-western sectors of Santa Cruz Province, Argentina. Agathoxylon agathioides (Kräusel and Jain) n. comb., Agathoxylon santalense (Sah and Jain) n. comb., Agathoxylon termieri (Attims) Gnaedinger and Herbst, and the new species Agathoxylon santacruzense n. sp. are described based on a detailed description of the secondary xylem. In this work, it was possible to construct scatter plots to elucidate the anatomical differences between the fossil species described on quantitative anatomical data. Comparisons are made with other Agathoxylon species from Gondwana. These parameters can be used to discriminate genera and species of wood found in the same formation, as well as to establish differences/similarities between other taxa described in other formations. Some localities contain innumerable “in situ” petrified trees, which allowed us to infer that these taxa formed small forests, or local forests, or small forests within a dense forest, which is a habitat coincident with the extant Araucariaceae.

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27

Di Girolamo, Alice, Janani Durairaj, Adèle van Houwelingen, Francel Verstappen, Dirk Bosch, Katarina Cankar, Harro Bouwmeester, Dick de Ridder, Aalt D. J. van Dijk, and Jules Beekwilder. "The santalene synthase from Cinnamomum camphora: Reconstruction of a sesquiterpene synthase from a monoterpene synthase." Archives of Biochemistry and Biophysics 695 (November 2020): 108647. http://dx.doi.org/10.1016/j.abb.2020.108647.

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28

Mordini, Alessandro, Sabina Pecchi, and Giuseppe Capozzi. "The synthesis of 4′-thia-α-santalene and 4′-thia-α-santalol through an organometallic approach." Tetrahedron 50, no. 20 (January 1994): 6029–36. http://dx.doi.org/10.1016/s0040-4020(01)90455-7.

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29

Krotz, Achim, and Günter Helmchen. "Total syntheses of sandalwood fragrances: (Z)- and (E)-β-santalol and their enantiomers, ent-β-santalene." Tetrahedron: Asymmetry 1, no. 8 (January 1990): 537–40. http://dx.doi.org/10.1016/s0957-4166(00)80544-3.

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30

Oppolzer, Wolfgang, Christian Chapuis, Dominique Dupuis, and Maodao Guo. "AsymmetricDiels-Alder Reactions of Neopentyl-Ether-Shielded Acrylates and Allenic Esters: Syntheses of (?)-Norbornenone and (?)-?-Santalene." Helvetica Chimica Acta 68, no. 8 (December 18, 1985): 2100–2114. http://dx.doi.org/10.1002/hlca.19850680803.

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31

Zhong, Guo-fu, and Manfred Schlosser. "4′-Oxa-α-santalene and 4′-oxa-α-santalol : An olfactory comparison with the analogous natural sesquiterpenes." Tetrahedron Letters 34, no. 39 (September 1993): 6265–68. http://dx.doi.org/10.1016/s0040-4039(00)73727-0.

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32

Scalcinati, Gionata, Siavash Partow, Verena Siewers, Michel Schalk, Laurent Daviet, and Jens Nielsen. "Combined metabolic engineering of precursor and co-factor supply to increase α-santalene production by Saccharomyces cerevisiae." Microbial Cell Factories 11, no. 1 (2012): 117. http://dx.doi.org/10.1186/1475-2859-11-117.

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33

Zhong, Guo-fu, and Manfred Schlosser. "A Short and Simple Access to Both Enantiomers of Epi-β-santalene and (Z)-Epi-β-santalol." Synlett 1994, no. 03 (1994): 173–74. http://dx.doi.org/10.1055/s-1994-22781.

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34

Kamikubo, Takashi, and Kunio Ogasawara. "Preparation of (+)-Tricyclo[6.2.1.02,7]undec-2(7)-en-3-one and Its Conversion into (+)-epi-β-Santalene." Chemistry Letters 24, no. 2 (February 1995): 95–96. http://dx.doi.org/10.1246/cl.1995.95.

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35

MORDINI, A., S. PECCHI, and G. CAPOZZI. "ChemInform Abstract: Synthesis of 4′-Thia-α-santalene and 4′-Thia-α-santalol Through an Organometallic Approach." ChemInform 25, no. 39 (August 18, 2010): no. http://dx.doi.org/10.1002/chin.199439232.

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36

Coulerie, Paul, Louis Thouvenot, Mohammed Nour, and Yoshinori Asakawa. "Chemical Originalities of New Caledonian Liverworts from Lejeuneaceae Family." Natural Product Communications 10, no. 9 (September 2015): 1934578X1501000. http://dx.doi.org/10.1177/1934578x1501000903.

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Lejeuneaceae is the largest family of liverworts in the world. Through the analyses of the chemical composition of some species, it has been demonstrated that they may represent an important source of original and bioactive molecules. None of the 146 species that occur in New Caledonia has been studied yet. Here we describe the terpenoid content of twelve New Caledonian species, including two endemics. We describe here, for the first time, the presence of frullanolide in the Lejeuneaceae, occurring as a major compound in the extract from Colura leratii, and a rarely observed santalene derivative from Acrolejeunea securifolia subsp. caledonica. These analyses also highlight species that probably contain original structures, such as Schiffneriolejeunea tumida var. hasskarliana, Cheilolejeunea spp and Thysananthus retusus. The results obtained here also confirm several previous hypotheses about the chemosystematics of the Lejeuneaceae. For example, lepidozene can be considered as a chemosystematic marker of the Ptychantoideae subfamily, considering its abundance in many Ptychantoideae. On the other hand, some results are different from those described previously. For example, we detected no fusicoccane derivatives in any of the Lejeuneaceae species analyzed here, whereas they were previously described as a marker of the Ptychantoideae. This suggests that the available data toward the chemistry of the Lejeuneaceae are not sufficient to be confident with some of the previous chemosystematic conclusions.

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37

ZHONG, G. F., and M. SCHLOSSER. "ChemInform Abstract: A Short and Simple Access to Both Enantiomers of Epi-β-santalene and (Z)-Epi-β-santalol." ChemInform 25, no. 34 (August 19, 2010): no. http://dx.doi.org/10.1002/chin.199434206.

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38

KAMIKUBO, T., and K. OGASAWARA. "ChemInform Abstract: Preparation of (+)-Tricyclo(6.2.1.02,7)undec-2(7)-en-3-one and Its Conversion into (+)-epi-β-Santalene." ChemInform 26, no. 29 (August 17, 2010): no. http://dx.doi.org/10.1002/chin.199529250.

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39

Baldovini, Nicolas, and Guy Solladié. "Application of the asymmetric Diels–Alder reaction of a 2-substituted chiral maleate to the formal synthesis of (−)-β-santalene." Tetrahedron: Asymmetry 13, no. 8 (May 2002): 885–89. http://dx.doi.org/10.1016/s0957-4166(02)00194-5.

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40

Jones, Christopher G., Jessie Moniodis, Katherine G. Zulak, Adrian Scaffidi, Julie A. Plummer, Emilio L. Ghisalberti, Elizabeth L. Barbour, and Jörg Bohlmann. "Sandalwood fragrance biosynthesis involves sesquiterpene synthases of both the terpene synthase (TPS)-a and TPS-b subfamilies, including santalene synthases." Journal of Biological Chemistry 287, no. 45 (November 2, 2012): 37713–14. http://dx.doi.org/10.1074/jbc.a111.231787.

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41

Jones, Christopher G., Jessie Moniodis, Katherine G. Zulak, Adrian Scaffidi, Julie A. Plummer, Emilio L. Ghisalberti, Elizabeth L. Barbour, and Jörg Bohlmann. "Sandalwood Fragrance Biosynthesis Involves Sesquiterpene Synthases of Both the Terpene Synthase (TPS)-a and TPS-b Subfamilies, including Santalene Synthases." Journal of Biological Chemistry 286, no. 20 (March 24, 2011): 17445–54. http://dx.doi.org/10.1074/jbc.m111.231787.

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42

Barton, Dustin, and James Chickos. "Vaporization enthalpies and vapor pressures of the major components of opopanax oil, α-santalene, cis α-bisabolene, cis α-bergamotene." Structural Chemistry 32, no. 3 (March 24, 2021): 939–52. http://dx.doi.org/10.1007/s11224-021-01764-4.

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43

Krotz, Achim, and Günter Helmchen. "Total Syntheses, Optical Rotations and Fragrance Properties of Sandalwood Constituents: (−)-(Z)- and (−)-(E)-β-Santalol and Their Enantiomers,ent-β-Santalene." Liebigs Annalen der Chemie 1994, no. 6 (June 13, 1994): 601–9. http://dx.doi.org/10.1002/jlac.199419940610.

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44

Muturi, Ephantus J., William T. Hay, Kenneth M. Doll, Jose L. Ramirez, and Gordon Selling. "Insecticidal Activity of Commiphora erythraea Essential Oil and Its Emulsions Against Larvae of Three Mosquito Species." Journal of Medical Entomology 57, no. 6 (May 30, 2020): 1835–42. http://dx.doi.org/10.1093/jme/tjaa097.

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Abstract The use of essential oils as ecofriendly tools for vector management is one of the mainstreams for biopesticide research. We evaluated the larvicidal properties of Commiphora erythraea (opoponax) essential oil and its fractions against Culex restuans Theobald, Culex pipiens L., and Aedes aegypti L. The use of bio-based amylose–N-1-hexadecylammonium chloride inclusion complex (Hex-Am) and amylose–sodium palmitate inclusion complex (Na-Palm) as emulsifiers for C. erythraea essential oil was also investigated. Bisabolene was the most abundant chemical constituent in the whole essential oil (33.9%), fraction 2 (62.5%), and fraction 4 (23.8%) while curzerene (32.6%) and α-santalene (30.1%) were the dominant chemical constituents in fractions 1 and 3, respectively. LC50 values for the whole essential oil were 19.05 ppm for Cx. restuans, 22.61 ppm for Cx. pipiens, and 29.83 ppm for Ae. aegypti and differed significantly. None of the four C. erythraea essential oil fractions were active against mosquito larvae. Two CYP450 genes (CYP6M11 and CYP6N12) and one GST gene (GST-2) were significantly upregulated in Ae. aegypti larvae exposed to C. erythraea essential oil suggesting their potential involvement in metabolic pathways for C. erythraea essential oil. Essential oil emulsions produced with Hex-Am were more toxic than the whole essential oil while those produced with Na-Palm had similar toxicity as the whole essential oil. These findings demonstrate that C. erythraea essential oil is a promising source of mosquito larvicide and that the use of Hex-Am as an emulsifier can enhance the insecticidal properties of C. erythraea essential oil.

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Chen, Yanhang, Musavvara Kh Shukurova, Yonathan Asikin, Miyako Kusano, and Kazuo N. Watanabe. "Characterization of Volatile Organic Compounds in Mango Ginger (Curcuma amada Roxb.) from Myanmar." Metabolites 11, no. 1 (December 30, 2020): 21. http://dx.doi.org/10.3390/metabo11010021.

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Curcuma amada Roxb. (Zingiberaceae), commonly known as mango ginger because its rhizome and foliar parts have a similar aroma to mango. The rhizome has been widely used in food industries and alternative medicines to treat a variety of internal diseases such as cough, bronchitis, indigestion, colic, loss of appetite, hiccups, and constipation. The composition of the volatile constituents in a fresh rhizome of C. amada is not reported in detail. The present study aimed to screen and characterize the composition of volatile organic compound (VOC) in a fresh rhizome of three C. amada (ZO45, ZO89, and ZO114) and one C. longa (ZO138) accessions originated from Myanmar. The analysis was carried out by means of headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography-time-of-flight-mass spectrometry (GC-TOF-MS). As a result, 122 VOCs were tentatively identified from the extracted 373 mass spectra. The following compounds were the ten most highly abundant and broadly present ones: ar-turmerone, α-zingiberene, α-santalene, (E)-γ-atlantone, cuparene, β-bisabolene, teresantalol, β-sesquiphellandrene, trans-α-bergamotene, γ-curcumene. The intensity of ar-turmerone, the sesquiterpene which is mainly characterized in C. longa essential oil (up to 15.5–27.5%), was significantly higher in C. amada accession ZO89 (15.707 ± 5.78a) compared to C. longa accession ZO138 (0.300 ± 0.08b). Cis-α-bergamotene was not detected in two C. amada accessions ZO45 and ZO89. The study revealed between-species variation regarding identified VOCs in the fresh rhizome of C. amada and C. longa.

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Roussis, Vassilios, Constantinos Vagias, Christina Tsitsimpikou, and Nina Diamantopoulou. "Chemical Variability of the Volatile Metabolites from the Caribbean Corals of the Genus Gorgonia." Zeitschrift für Naturforschung C 55, no. 5-6 (June 1, 2000): 431–41. http://dx.doi.org/10.1515/znc-2000-5-620.

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The chemical composition of the investigated gorgonians showed a high level of individual variation and the colonies, according to their major contributors, were assigned to 10 distinct chemical profiles, among which A , C, E , and G were them ost abundant ones. From the metabolites identified in the present study, either by means of GC /MS or using NMR techniques after conventional separation procedures, the novel cyclic ether 5,10-epoxymuurolane is found in significant quantities in D and I chemical profiles. Furanotriene, isofuranotriene and furanodiene could be referred as the most common metabolites of the genus, since they are found in 6 out of 10 chemical profiles. Isosericenine is, also, a significant contributor of H and I chemical profiles. A number of sesquiterpene hydrocarbons, such as curzerene, bicyclogermacrene, valencene, β-bourbonene and β -elemene, along with the oxygenated sesquiterpenes elemanolide and furoventalene, are present at varying concentrations in the majority of the chemical profiles. Metabolites of high discriminant value are: α-himachalene for the K chemical profile, α -santalene and its oxygenated derivatives for the G chemical profile and the three geometrical isomers of germacrone for the F chemical profile. Several chemical profiles show ed narrow geographic distribution. Most of the chemical profiles are located in the north, while F inhabits mainly southern sites and the others are equally distributed. Finally, 91 % of the chemical profiles of the gorgonian colonies appeared to grow in all depths, while 9 % did not inhabit deep -water environments. Most chemical profiles are less frequent at higher water depths with the exception of chemical profiles A and C.

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Scalcinati, Gionata, Christoph Knuf, Siavash Partow, Yun Chen, Jérôme Maury, Michel Schalk, Laurent Daviet, Jens Nielsen, and Verena Siewers. "Dynamic control of gene expression in Saccharomyces cerevisiae engineered for the production of plant sesquitepene α-santalene in a fed-batch mode." Metabolic Engineering 14, no. 2 (March 2012): 91–103. http://dx.doi.org/10.1016/j.ymben.2012.01.007.

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KROTZ, A., and G. HELMCHEN. "ChemInform Abstract: Total Syntheses, Optical Rotations and Fragrance Properties of Sandalwood Constituents: (-)-(Z)- and (-)-(E)-β-Santalol and Their Enantiomers, ent-β-Santalene." ChemInform 25, no. 45 (August 18, 2010): no. http://dx.doi.org/10.1002/chin.199445192.

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Juvik, John A. "IMPROVED HOST PLANT RESISTANCE BY MODIFICATION OF PLANT CHEMICAL CUES ASSOCIATED WITH HELIOTHIS ZEA HOST PLANT SELECTION FOR OVIPOSITION." HortScience 25, no. 9 (September 1990): 1178a—1178. http://dx.doi.org/10.21273/hortsci.25.9.1178a.

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Heliothis zea (Boddle) is one of agriculture's worst insect pests. Reduction in crop productivity and costs for insecticidal control of this cosmopolitan pest cost U.S. agriculture many millions of dollars annually. The sesquiterpenes (+)-E-å-santalen-12-oic and (+)-E- endo- β–bergamoten-12-oic acids isolated from hexane leaf extracts of the wild tomato species, Lycopersicon hirsutum, have been shown to attract and stimulate oviposition by female H. zea. Extracts from other host plants (tobacco, corn, and cotton) also possess attractant/oviposition stimulant activity to female H. zea. Studies are underway to assess the potential use of these and other phytochemicals for the control or monitoring of population levels of H. zea in tomato, corn and cotton fields.The isolation and structural identification of insect pest oviposition stimulants in horticultural crop species can provide valuable information to plant breeders involved in developing cultivars with improved insect host plant resistance. This information could be used to develop cultivars lacking the chemical cues used by insects for host plant location and recognition. Risks of public exposure to toxic insecticides through consumption of agricultural produce and polluted ground water emphasize the critical need for the development of crop genotypes with improved best plant resistance as a supplementary method of insect pest management in agricultural ecosystems.

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Tanase, Corneliu, Ruxandra Ștefănescu, Béla Darkó, Daniela Lucia Muntean, Anca Corina Fărcaş, and Sonia Ancuţa Socaci. "Biochemical and Histo-Anatomical Responses of Lavandula angustifolia Mill. to Spruce and Beech Bark Extracts Application." Plants 9, no. 7 (July 7, 2020): 859. http://dx.doi.org/10.3390/plants9070859.

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This paper aims to assess the biological responses of Lavandula angustifolia Mill. to beech and spruce bark crude extract application. Thus, the biological activity of bark extracts was assessed by determining the germination capacity, biomass production, histo-anatomical aspects and photo-assimilatory pigment accumulation, and by quantitative and qualitative volatile compounds analysis. The application of spruce bark extract (500 mg dry bark/100 mL solvent) resulted in a better development of the leaf tissue and an increase in foliar biomass. We observed the stimulating effect of photo-assimilating pigments accumulation, for all experimental variants, compared to the control. Also, the amount of volatile oil was significantly higher in the treated plants with spruce bark extract (500 mg dry bark/100 mL solvent). Some volatile compounds (cyclen, borneol, cryptone, santalen, and caryophyllene oxide β—farnesene) were identified only in the experimental variants. Also, in the experimental variants, an increase in the quantity of limonene, linalyl acetate and lavandulol was observed. These preliminary results showed that the beech and spruce bark extracts can have biological activities and influence the production of volatile oil in Lavandula angustifolia, causing significant changes in the phytochemical profile of the essential oil. Thus, forest waste bark extracts could be recommended as natural bioregulators in lavender crops.

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