Gotowe bibliografie tematyczne / Sesquiterpenes

Gotowa bibliografia na temat „Sesquiterpenes”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 7 lipca 2024

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Artykuły w czasopismach na temat "Sesquiterpenes"

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Coca-Ruíz, Víctor, Ivonne Suárez, Josefina Aleu i Isidro G. Collado. "Structures, Occurrences and Biosynthesis of 11,12,13-Tri-nor-Sesquiterpenes, an Intriguing Class of Bioactive Metabolites". Plants 11, nr 6 (14.03.2022): 769. http://dx.doi.org/10.3390/plants11060769.

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The compounds 11,12,13-tri-nor-sesquiterpenes are degraded sesquiterpenoids which have lost the C3 unit of isopropyl or isopropenyl at C-7 of the sesquiterpene skeleton. The irregular C-backbone originates from the oxidative removal of a C3 side chain from the C15 sesquiterpene, which arises from farnesyl diphosphate (FDP). The C12-framework is generated, generally, in all families of sesquiterpenes by oxidative cleavage of the C3 substituent, with the simultaneous introduction of a double bond. This article reviews the isolation, biosynthesis and biological activity of this special class of sesquiterpenes, the 11,12,13-tri-nor-sesquiterpenes.
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Silva, Waldeyr M. C. da, Jakob L. Andersen, Maristela T. Holanda, Maria Emília M. T. Walter, Marcelo M. Brigido, Peter F. Stadler i Christoph Flamm. "Exploring Plant Sesquiterpene Diversity by Generating Chemical Networks". Processes 7, nr 4 (25.04.2019): 240. http://dx.doi.org/10.3390/pr7040240.

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Plants produce a diverse portfolio of sesquiterpenes that are important in their response to herbivores and the interaction with other plants. Their biosynthesis from farnesyl diphosphate depends on the sesquiterpene synthases that admit different cyclizations and rearrangements to yield a blend of sesquiterpenes. Here, we investigate to what extent sesquiterpene biosynthesis metabolic pathways can be reconstructed just from the knowledge of the final product and the reaction mechanisms catalyzed by sesquiterpene synthases. We use the software package MedØlDatschgerl (MØD) to generate chemical networks and to elucidate pathways contained in them. As examples, we successfully consider the reachability of the important plant sesquiterpenes β -caryophyllene, α -humulene, and β -farnesene. We also introduce a graph database to integrate the simulation results with experimental biological evidence for the selected predicted sesquiterpenes biosynthesis.
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Wang, Junchi, Qi Zheng, Huaxiang Wang, Leiling Shi, Guoping Wang, Yaqin Zhao, Congzhao Fan i Jianyong Si. "Sesquiterpenes and Sesquiterpene Derivatives from Ferula: Their Chemical Structures, Biosynthetic Pathways, and Biological Properties". Antioxidants 13, nr 1 (19.12.2023): 7. http://dx.doi.org/10.3390/antiox13010007.

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Ferula is a genus of flowering plants known for its edible and medicinal properties. Since ancient times, many species of Ferula have been used in traditional medicine to treat various health issues across countries, such as digestive disorders, respiratory problems, and even as a remedy for headaches and toothaches. In addition, they are also used as a flavoring agent in various cuisines. As the main active ingredients in Ferula, sesquiterpenes and their derivatives, especially sesquiterpene coumarins, sesquiterpene phenylpropanoids, and sesquiterpene chromones, have attracted the attention of scientists due to the diversity of their chemical structures, as well as their extensive and promising biological properties, such as antioxidative, anti-inflammatory, antibacterial properties. However, there has not been a comprehensive review of sesquiterpenes and their derivatives from this plant. This review aims to provide an overview of the chemical structures, biosynthetic pathways, and biological properties of sesquiterpenes and sesquiterpene derivatives from Ferula, which may help guide future research directions and possible application methods for this valuable edible and medicinal plant.
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Saifudin, Azis, Ken Tanaka, Shigetoshi Kadota i Yasuhiro Tezuka. "Chemical Constituents of Blumea balsamifera of Indonesia and Their Protein Tyrosine Phosphatase 1B Inhibitory Activity". Natural Product Communications 7, nr 7 (lipiec 2012): 1934578X1200700. http://dx.doi.org/10.1177/1934578x1200700701.

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A methanol extract of the leaves of Blumea balsamifera (L.) DC. (Asteraceae) afforded a new guaian-type sesquiterpene, epiblumeaene K (1), together with four known guaian-type sesquiterpenes (2–5), three known sesquiterpenes (6–8), and nine known flavonoids (9–17) by a combination of chromatography and preparative TLC techniques. Their structures were elucidated by extensive spectroscopic methods and comparison with the literature data. Among the isolated compounds, a known sesquiterpene, β-caryophyllene 8 R,9 R-oxide (6), exhibited a significant PTP1B inhibitory activity in a dose-dependent manner, with an IC50 value of 25.8μM (5.62μg/mL).
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Ayer, William A., i Peter Craw. "Metabolites of the fairy ring fungus, Marasmiusoreades. Part 2. Norsesquiterpenes, further sesquiterpenes, and agrocybin". Canadian Journal of Chemistry 67, nr 9 (1.09.1989): 1371–80. http://dx.doi.org/10.1139/v89-210.

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The fungus Marasmiusoreades has previously been reported to produce the sesquiterpenes marasmone (1), anhydromarasmone (2), isomarasmone (3), and dihydromarasmone (4) when grown in liquid culture. We report herein several other sesquiterpene metabolites of the same skeleton but with differing oxidation patterns. The norsesquiterpenes O-formyloreadone (15a), 3α-hydroxyoreadone (15c), and dehydrooreadone (17b) are also reported. It is suggested that the formyl group in 15a is derived biogenetically from C-15 of a precursor sesquiterpene. Oxidation of 1α, 15-dihydroxymarasmene (13a), one of the new sesquiterpenes reported, with one equivalent of pyridinium dichromate gives O-formyloreadone (15a) as one of the products. Agrocybin (5), a polyacetylene amide previously isolated from the fungus Agrocybedura, has also been isolated from the cultures of M. oreades. It is suggested that agrocybin (5) is the phytotoxic compound responsible for the killing of grass caused by the fairy ring mushroom fungus. Keywords: sesquiterpenes, fungal metabolites, drimanes, fairy ring mushroom, agrocybin.
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Li, Li, Shenghui Yang, Dilu Chen, Zhihuang Wu, Meijun Zhang, Fang Yang, Li Qin i Xiaojiang Zhou. "In Vitro Anti-Influenza A Virus H1N1 Effect of Sesquiterpene-Rich Extracts of Carpesium abrotanoides". Molecules 27, nr 23 (29.11.2022): 8313. http://dx.doi.org/10.3390/molecules27238313.

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Due to a high content of sesquiterpenes, Carpesium abrotanoides has been investigated to fully explore its health-promoting properties. Therefore, this work aimed to assess, for the first time, the anti-influenza A virus H1N1 potential of sesquiterpene-targeted fractions of the herb derived from C. abrotanoides. Five compounds, including four sesquiterpenes and one aldehyde, were isolated and identified from the sesquiterpene-rich extracts of C. abrotanoides (SECA), and the contents of three main sesquiterpenes in the SECA were determined. Furthermore, SECA showed a significant protective effect in the MDCK cells infected with influenza A virus (H1N1) in three different conditions: premixed administration, prophylactic administration, and therapeutic administration. SECA can significantly decrease the mRNA expressions of TLR4, MyD88, NF-κB, TNF-α, and IL-6, as well as the protein expressions of TLR4, MyD88, and NF-κB. This result suggests that SECA can resist the influenza A virus H1N1 through the TLR4/MyD88/NF-κB signal pathway.
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Yan, Xiaoguang, Yukun Li, Weiguo Li, Dongmei Liang, Shengxin Nie, Ruiqi Chen, Jianjun Qiao, Mingzhang Wen i Qinggele Caiyin. "Transcriptome Analysis and Identification of Sesquiterpene Synthases in Liverwort Jungermannia exsertifolia". Bioengineering 10, nr 5 (9.05.2023): 569. http://dx.doi.org/10.3390/bioengineering10050569.

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The liverwort Jungermannia exsertifolia is one of the oldest terrestrial plants and rich in structurally specific sesquiterpenes. There are several sesquiterpene synthases (STSs) with non-classical conserved motifs that have been discovered in recent studies on liverworts; these motifs are rich in aspartate and bind with cofactors. However, more detailed sequence information is needed to clarify the biochemical diversity of these atypical STSs. This study mined J. exsertifolia sesquiterpene synthases (JeSTSs) through transcriptome analysis using BGISEQ-500 sequencing technology. A total of 257,133 unigenes was obtained, and the average length was 933 bp. Among them, a total of 36 unigenes participated in the biosynthesis of sesquiterpenes. In addition, the in vitro enzymatic characterization and heterologous expression in Saccharomyces cerevisiae showed that JeSTS1 and JeSTS2 produced nerolidol as the major product, while JeSTS4 could produce bicyclogermacrene and viridiflorol, suggesting a specificity of J. exsertifolia sesquiterpene profiles. Furthermore, the identified JeSTSs had a phylogenetic relationship with a new branch of plant terpene synthases, the microbial terpene synthase-like (MTPSL) STSs. This work contributes to the understanding of the metabolic mechanism for MTPSL-STSs in J. exsertifolia and could provide an efficient alternative to microbial synthesis of these bioactive sesquiterpenes.
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Zhang, Xu-Feng, Jie Ren, Xiang-Rong Cheng, Hui-Zi Jin i Wei-Dong Zhang. "One new unusual sesterterpenoid and four new sesquiterpene dimers from Inula britannica". RSC Advances 5, nr 3 (2015): 1979–82. http://dx.doi.org/10.1039/c4ra11171k.

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Jerković, Igor, Željan Maleš i Maja Friščić. "Actualities in the phytochemical research on selected terpenes". Acta Pharmaceutica 69, nr 4 (1.12.2019): 533–40. http://dx.doi.org/10.2478/acph-2019-0036.

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Abstract A short review of our recent research on the essential oil phytochemical composition of Petasites albus (L.) Gaertn. and Petasites hybridus (L.) G. Gaertn., B. Mey. & Scherb. (Asteraceae) as well as on the oils of Globularia cordifolia L., Globularia meridionalis (Podp.) O. Schwarz and Globularia punctata Lapeyr. (Plantaginaceae) is presented. All essential oils contained a variety of oxygenated sesquiterpenes among their major constituents, including a bakkane type sesquiterpene fukinanolid (bakkenolide A). The paper is focused on: i) a short overview of the abundance of major terpenes in the essential oils of Petasites and Globularia species from Croatia; ii) possible biosynthetic pathways of major identified sesquiterpenes; and iii) biological activities (literature data) of major sesquiterpenes from Petasites and Globularia species.
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Liang, Yi, Xiao-Ming Li, Chun-Shun Li, Hong Sun i Bin-Gui Wang. "Laurane-, Cyclolaurane-, and Cuparane-type Sesquiterpenes from the Marine Red Alga Laurencia okamurai". Natural Product Communications 9, nr 3 (marzec 2014): 1934578X1400900. http://dx.doi.org/10.1177/1934578x1400900310.

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Chemical investigation of the secondary metabolites extracted from the marine red alga Laurencia okamurai has resulted in the isolation of one new (lauramurin, 1) and six known (2–7) sesquiterpenes. On the basis of the data obtained by our detailed spectroscopic analysis as well as by comparison with those reported, the structures of these compounds were elucidated as four laurane sesquiterpenes including lauramurin (1), laur-11-en-10-ol (2), aplysinol (3), and debromoaplysinol (4), two cyclolaurane sesquiterpenes laurequinone (5) and laurentristich-4-ol (6), and one cuparane ether sesquiterpene (7). The antibacterial activity against Staphylococcus aureus and brine shrimp ( Artemia salina) lethality for the isolated compounds were evaluated. Compounds 2 and 5–7 displayed moderate lethality against brine shrimp.
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Rozprawy doktorskie na temat "Sesquiterpenes"

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Henry, S. G. "Studies towards tricyclic sesquiterpenes". Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.603969.

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There has been considerable interest in the synthesis and biological properties of sesquiterpene lactones as a result of their cytotoxic activity. This manuscript describes a concise synthesis of the elemanolide model compound 3.1 and studies towards the synthesis of 8-deoxyvernolepin 1.6. The first chapter will deal with sesquiterpene motifs, culminating in the introduction of elemanolides and eudesmanolides. Isolation and biological activity of elemanolides (particularly vernolepin) will be presented, along with a possible biosynthesis and selected previous syntheses. Chapter two details the role of manganese triacetate in oxidative radical reactions, highlighting the main differences between manganese and tin. A brief outline of work done in our group on oxidative cyclisations with manganese(III) acetate is included, along with examples of tethered cyclisations. Chapter three discusses an enantioselective route to a model compound of 8-deoxyvernolepin 1.6 utilising an enantioselective Diels Alder reaction, followed by attempted 1,3-transpositons of stereochemical information. Chapter four describes a racemic synthetic pathway to both 8-deoxyvernolepin 1.6, the model compound 3.1 and subsequent analogues, using a racemic Diels-Alder reaction, palladium-mediated π-allyl substitution and tin-mediated radical substitution.
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Vieira, Tiago de Oliveira. "Estudos visando à síntese de sesquiterpenos bacanos". Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/46/46135/tde-06062016-155559/.

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Nesta tese, efetuamos estudos visando à síntese de sesquiterpenos bacanos, cuja etapa chave consistiu na construção do sistema cis-hidrindânico, através de reação de contração de anel de cis-octalinas e 2-octalonas mediada por trinitrato de tálio (TTN). Apenas as cis-octalinas como, por exemplo, o cis-4a-metil-l,2,3,4,4a,5,8,8a-octahidronaftaleno e o cis-4a, 7-dimetil-l,2,3,4,4a,5,8,8a-octa-hidronaftaleno, foram passíveis de reação de contração de anel em rendimentos satisfatórios; já a cis-5,10-dimetil-l(9)-octal-2-ona levou ao produto de contração em baixo rendimento. Tentamos utilizar a reação de cis-4a-metil-l,2,3,4,4a,5,8,8a-octa-hidronaftaleno com TTN na síntese da nor-baquenolida-A, porém não conseguimos completar a síntese desta, pois não foi possível efetuar a última etapa sintética, nas várias abordagens testadas. Grandes esforços também foram empregados na preparação diastereosseletiva da cis-5,10-dimetil-l(9)-octal-2-ona através de três abordagens diferentes que foram investigadas, sendo duas delas com êxito. Contudo, o baixo rendimento (38%) da etapa de contração de anel da cis-5,10-dimetil-l(9)-octal-2-ona não permitiu a continuação da rota sintética proposta para a baquenolida-A. Também realizamos a resolução cinética de três diferentes cis-octalóis que foram preparados através da reação de Diels-Alder seguida de redução diastereosseletiva - com a lipase Novozym 435, e os produtos resolvidos foram obtidos em excelentes rendimentos isolados (≥ 40% para cada enantiômero) e excelentes excessos enantioméricos (≥ 98%).
In this thesis, we have developed studies towards the synthesis of sesquiterpenes bakkanes, which key step consisted on the construction of the cis-hydrindanic system through a thallium(III) mediated ring contraction reaction of cis-decalins and 2-octalones. Only the cis-octalins, such as the 1,2,3,4,4a,5,8,8a-octahydro-4a-methylnaphthalene and the 1,2,3,4,4a,5,8,8a-octahydro-4a,7-dimethylnaphthalene, were able to be ring contracted in satisfactory yields; the 4,4a,5,6,7,8-hexahydro-4a,5-dimethylnaphthalen-2(3H)-one, however, furnished the ring contraction product in low yield. We tried to use the reaction of 1,2,3,4,4a,5,8,8a-octahydro-4amethylnaphthalene with TTN in the synthesis of nor-bakkenolide-A, but we could not accomplish the synthesis because it was not possible to make the last step of the sequence, in all tested approaches. Great efforts were made in the diastereoselective preparation of the 4,4a,5,6, 7 ,8-hexahydro-4a,5-dimethylnaphthalen-2(3H)-one, through three different approaches that were investigated, being two of them with profit. However, the low yield (38%) of the ring contraction reaction of 4,4a,5,6, 7,8-hexahydro-4a,5-dimethylnaphthalen-2(3H)-one, precluded the continuation of the synthetic rout proposed to the bakkenolide-A. We have also performed the kinetic resolution of three different cis-octalols that were prepared through Diels-Alder reaction followed by diastereoselective reduction - with the Novozym 435 lipase, and the resolved products were isolated in excellent yields (≥ 40% for each enantiomer) and excellent ee\'s (≥ 98%).
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伍冠先 i Koon-sin Ngo. "Synthesis isolation and autoxidation of sesquiterpenes". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31239134.

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Perea, Buceta Jesus E. "Synthetic studies on anislactone-type sesquiterpenes". Thesis, University of Edinburgh, 2007. http://hdl.handle.net/1842/15628.

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Extensive phytochemical studies carried out over the last two decades on plants of the genus Illicium, had led to the isolation and characterization of several anislactone-type sesquiterpenes. The neurotrophic activity of merrilactone A 17, coupled with the structural diversity which could be accessed by further derivatisation of other members, gives this family of secondary metabolites value in the process of discovering novel therapeutic agents to address the molecular causes underlying the progression of neurodegenerative diseases. Additionally, the anislactone-type sesquiterpenes family constitutes an ideal synthetic arena for the development of innovative methods dealing with the construction of highly-functionalised five-membered rings, and the creation of contiguous fully-substituted stereocentres. The thesis presented herein, describes the results obtained in the course of our investigations to lay the foundations of a synthetic program targeting the divergent total syntheses of several members of the anislactone-type sesquiterpenes family, including the novel implementation and limitations associated to a domino oxy-/carbopalladation reaction, which proved to be pivotal in the development of a short route towards the oxa[3.3.3]propellane carbocyclic core of merrilactone A, in addition to the development of a expeditive nine-steps route furnishing the tricyclic core of the anislactone-type sesquiterpenes 14, 15, 16 and 19, in a high overall yield.
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Ngo, Koon-sin. "Synthesis isolation and autoxidation of sesquiterpenes /". Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B2102103X.

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Sarkar, Purabi. "Studies in the synthesis of sesquiterpenes". Thesis, University of North Bengal, 1992. http://hdl.handle.net/123456789/852.

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Leung, Pou Ian. "Sesquiterpenes emission from common airborne fungal species /". View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?EVNG%202009%20LEUNG.

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Vaidya, S. P. "Studies in sesquiterpenes: newer perspectives of longifolene". Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 1985. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/3238.

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Satyanarayana, N. "Studies in sesquiterpenes (newer aspects of longifolene)". Thesis(Ph.D.), CSIR-National Chemical Laboratory, Poona, 1985. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/3230.

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Selvakumar, N. "Synthetic investigations on terpenoids". Thesis, Indian Institute of Science, 1994. https://etd.iisc.ac.in/handle/2005/110.

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The thesis entitled "Synthetic Investigations on Terpenoids" is divided into two sections. Section 1 deals with the total synthesis of sesquiterpenes belonging to the Zizsene group and Section 2 contains the synthetic investigations on the furanoid dlterpenes of labdane group.
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Książki na temat "Sesquiterpenes"

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Breitmaier, E. Terpenes: Flavors, fragrances, pharmaca, pheromones. Weinheim, Germany: WILEY-VCH, 2006.

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Krahn, Ulrich. Gaschromatographisch-massenspektroskopische Untersuchungen der flüchtigen Stoffwechselprodukte des sesquiterpenbildenden Basidiomyceten Poria xantha. Berlin: P. Oberhofer, 1986.

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Richard, Beasley Val, red. Trichothecene mycotoxicosis: Pathophysiologic effects. Boca Raton, Fla: CRC Press, 1989.

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Sülsen, Valeria Patricia, i Virginia Susana Martino, red. Sesquiterpene Lactones. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78274-4.

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Morrissey, Brian Eamon. A study of the sesquiterpene aryl esters of armillaria species. Dublin: University College Dublin, 1997.

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Serkerov, Siradzhaddin Veli ogly. Terpenoidy i fenolproizvodnye rasteniĭ semeĭstv: Asteraceae i Apiaceae. Baku: CBS, 2005.

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Schreiner, Oswald. Sesquiterpenes: A Monograph. Creative Media Partners, LLC, 2018.

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Crock, John Edward. Five sesquiterpene synthases. 1998.

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Pirrung, Michael C., David Goldsmith, Andrew T. Morehead i Andrew T. Jr Morehead. Total Synthesis of Natural Products: Acyclic and Monocyclic Sesquiterpenes. Wiley & Sons, Incorporated, John, 2009.

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Pirrung, Michael C., David Goldsmith i Morehead Andrew T. Jr. Total Synthesis of Natural Products: Acyclic and Monocyclic Sesquiterpenes. Wiley & Sons, Incorporated, John, 2007.

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Części książek na temat "Sesquiterpenes"

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Seigler, David S. "Sesquiterpenes". W Plant Secondary Metabolism, 367–97. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-4913-0_21.

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Zografos, Alexandros L., i Elissavet E. Anagnostaki. "Sesquiterpenes". W From Biosynthesis to Total Synthesis, 236–78. Hoboken, NJ: John Wiley & Sons, Inc, 2016. http://dx.doi.org/10.1002/9781118754085.ch7.

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Banik, Bimal Krishna, Abhishek Tiwari i Biswa Mohan Sahoo. "Sesquiterpenes Lactone". W Terpenoids, 517–46. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003008682-16.

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Atta-ur-Rahman i Viqar Uddin Ahmad. "Miscellaneous Sesquiterpenes". W 13C-NMR of Natural Products, 786–829. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3290-3_79.

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Sugita-Konishi, Yoshiko, i Makoto Kimura. "Nivalenol (Fungal Sesquiterpenes)". W Natural Products, 3123–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-22144-6_135.

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Sharma, Ajay, Vivek K. Bajpai i Shruti Shukla. "Sesquiterpenes and Cytotoxicity". W Natural Products, 3515–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-22144-6_152.

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Schütte, Horst-Robert. "Secondary Plant Substances: Sesquiterpenes". W Progress in Botany, 341–65. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-59940-8_13.

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Néri-Numa, Iramaia, Kele A. C. Vespermann, Carlos H. Carvalho, Bruno Nicolau Paulino, Maria J. Macedo, Gláucia M. Pastore, Juliano Lemos Bicas i Gustavo Molina. "Bioactive Potential of Sesquiterpenes". W Food Aroma Evolution, 695–718. 1st edition. | Boca Raton : CRC Press, 2019. | Series: Food analysis & properties, 2475-7551: CRC Press, 2019. http://dx.doi.org/10.1201/9780429441837-32.

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Durán, Alexandra G., Carlos Rial, M. Teresa Gutiérrez, José M. G. Molinillo i Francisco A. Macías. "Sesquiterpenes in Fresh Food". W Handbook of Dietary Phytochemicals, 1–66. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-1745-3_47-1.

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Durán, Alexandra G., Carlos Rial, M. Teresa Gutiérrez, José M. G. Molinillo i Francisco A. Macías. "Sesquiterpenes in Fresh Food". W Handbook of Dietary Phytochemicals, 477–542. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-4148-3_47.

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Streszczenia konferencji na temat "Sesquiterpenes"

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Zlatic, Nenad, Vladimir Mihailovic, Gorica Đelic, Marija Ljesevic, Vladimir Beskoski i Milan Stankovic. "VARIJABILNOST SESKVITERPENA ETARSKIH ULJA VRSTE TEUCRIUM MONTANUM L." W XXVI savetovanje o biotehnologiji sa međunarodnim učešćem. University of Kragujevac, Faculty of Agronomy, 2021. http://dx.doi.org/10.46793/sbt26.453z.

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The aim of this study is to determine the qualitative variability and relative presence of sesquiterpene hydrocarbons in essential oils samples of Teucrium montanum L. collected from two different substrate types. Four samples of essential oils from serpentinite and four from calcareous were obtained by the method of hydrodistillation from aboveground plant parts. Based on the results, it was shown that populations from serpentinite habitats synthesize 2 times more sesquiterpenes than from calcareous ones, while the compound 6-epi-β-cubeben was detected only in populations from calcareous. Edaphic characteristics of habitats affect the qualitative composition and relative presence of sesquiterpenes in essential oils, which has a significant application in biotechnology.
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Vasas, A., I. Lajter, P. Forgó, N. Kúsz, N. Bózsity, I. Zupkó, N. Nagy, G. Krupitza, R. Frish i J. Hohmann. "Sesquiterpenes from Neurolaena lobata with antiproliferative activity". W GA 2017 – Book of Abstracts. Georg Thieme Verlag KG, 2017. http://dx.doi.org/10.1055/s-0037-1608119.

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Kim, J. S., J. R. Kim, H. A. Lim, C. H. Jang, J. H. Kim, Y. K. Kim, T. Konishi i J. Yoon Park. "Induction of Detoxifying Enzyme by Sesquiterpenes Present in Inula helenium". W 13th World Congress of Food Science & Technology. Les Ulis, France: EDP Sciences, 2006. http://dx.doi.org/10.1051/iufost:20060786.

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Nejad Ebrahimi, S., H. Asadi, H. Esmaeili, A. Karami, J. Hadian, M. Hamburger i A. Chaanin. "Sesquiterpenes from Petasites hybridus rhizomes and determination absolute configuration by circular dichroism". W GA 2017 – Book of Abstracts. Georg Thieme Verlag KG, 2017. http://dx.doi.org/10.1055/s-0037-1608043.

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Ramseyer, J., B. Thuerig, M. De Mieri, HJ Schärer, T. Oberhänsli, MP Gupta, L. Tamm, O. Potterat i M. Hamburger. "Eudesmane sesquiterpenes from Verbesina lanata with inhibitory activity against major agricultural pathogen". W GA 2017 – Book of Abstracts. Georg Thieme Verlag KG, 2017. http://dx.doi.org/10.1055/s-0037-1608186.

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Kuck, K., B. Lipowicz, G. Jürgenliemk i J. Heilmann. "Isolation and structure elucidation of several tri- and sesquiterpenes from Commiphora myrrha (Nees) Engl." W 67th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research (GA) in cooperation with the French Society of Pharmacognosy AFERP. © Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-3399896.

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Derita, M., M. Di Liberto i S. Zacchino. "Importance of the C9 absolute configuration for the antifungal activity of natural and semisynthetic sesquiterpenes". W Proceedings of the International Conference on Antimicrobial Research (ICAR2010). WORLD SCIENTIFIC, 2011. http://dx.doi.org/10.1142/9789814354868_0073.

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Neves, Valdete de Souza Silva, ADRIANA MARIA DE BRITO SILVA, ALZIRA APARECIDA DA SILVA i ROSÂNGELA LUDWIG CAPATTO. "COMPOSIÇÃO QUÍMICA DO ÓLEO ESSENCIAL OBTIDO DAS FOLHAS E CASCAS DA Nectandr mebranacea (SW.) Griseb (Lauraceae) COLETADA NO SUL DE MATO GROSSO DO SUL." W II Congresso Brasileiro de Biodiversidade Virtual. Revista Multidisciplinar de Educação e meio ambiente, 2022. http://dx.doi.org/10.51189/ii-conbiv/7117.

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Introdução: Os óleos essenciais são líquidos oleosos e voláteis, dotados de forte aroma, quase sempre agradável e extraídos principalmente de plantas com grande variação na composição, formada principalmente por monoterpenos e sesquiterpenos. A Canela (Nectandra membranacea), que recebe o nome popular de canela caqui branca, é uma planta Lauraceae da América do Sul, a qual se atribui ações farmacológicas. As plantas desta família são ricas em metabólitos secundários ocorrendo principalmente lignanas, neolignanas, flavonóides, alcalóides e sesquiterpenos. As plantas deste género têm sido utilizadas no tratamento de vários distúrbios clínicos em seres humanos. A literatura relata trabalhos com relação à atividade biológica, havendo poucos estudos sobre seus constituintes químicos. Objetivo: Este trabalho tem por objetivo extração do óleo essencial e avaliação da composição química para folhas e cascas da canela por cromatografia gasosa acoplada a espectrometria de massas (GC-MS). Material e métodos: O material vegetal coletado de folhas e cascas e transportado ao laboratório da UEMS – unidade universitária de Naviraí para extração do óleo essencial por extrator tipo Clevenger. A identificação botânica da planta foi realizada através de comparação com as exsicatas presentes no Herbário DDMS da Universidade Federal da Grande Dourados - UFGD. O rendimento do óleo extraído foi de 0,49 % e 0,55 % para cascas e folhas, respectivamente. Sendo submetidos a análise por cromatografia gasosa com detecção por ionização em chama (GC-FID) para avaliação do perfil cromatográfico e otimização das condições de separação dos constituintes. GC-MS foi utilizado para caracterização dos constituintes dos óleos através dos espectros de massas obtidos . Os índices de retenção foram calculados através do uso de uma série de homóloga de hidrocarbonetos (C7-C30, Sigma-Aldrich). A partir de fracionamento cromatográfico foi isolado sesquiterpeno espatulenol tanto no para casca como para a folha. Resultados: Entre as atividades biológicas encontradas para o espatulenol destaca-se a antimicrobiana. A composição química para o óleo essencial das folhas e cascas avaliadas por GC-MS foram semelhantes e constituídos principalmente por sesquiterpenos tendo como compostos majoritários o espatulenol, α-elemeno e germacreno D. Conclusão: A análise química dos óleos permitiu verificar grande variação qualitativa e quantitativa de seus principais compostos, tanto em folha quanto em cascas, sendo todos sesquiterpenos.
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Rackov, Sanja, Aleksandra Nešić, Milan Vraneš i Branka Pilić. "DEVELOPMENT OF ELECTROSPUN POLY(VINYLPYRROLIDONE) (PVP) NANOFIBER MATS LOADED BY CALENDULA OFFICINALIS EXTRACT AND COENZYME Q10". W 1st INTERNATIONAL Conference on Chemo and BioInformatics. Institute for Information Technologies, University of Kragujevac, 2021. http://dx.doi.org/10.46793/iccbi21.169r.

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Electrospun systems can be applied to various areas, particularly in biomedicine for skin treatment. The fabricated nanofibers represent an interconnected three-dimensional network with a high surface area to volume ratio providing structural and morphological similarities with the extracellular matrix. Hence, facilitate the removal of exudates, promote gaseous exchange, conform to the contour of the treated area and in the case of drug-loaded nanofibers resulting in improved bioavailability. Polyvinylpyrrolidone was selected as a polymer carrier due to its biocompatible, hydrophilic nature with good chemical and mechanical properties, approved by the U.S. FDA (Food and Drug Administration) as a safe polymer for biomedical and food applications. Calendula officinalis or Marigold extract is one of the oldest medical plants with numerous proven pharmacological effects including anti-inflammatory, antibacterial/antifungal and wound healing activity related to the components of the flowers such as sesquiterpenes, saponins, triterpenes, flavonoids. Coenzyme Q10 (CoQ10, Ubiquinone) is a naturally occurring oil-soluble antioxidant and anti-inflammatory agent that supports collagen production, mostly popularized as an anti-aging ingredient in skincare products for topical use. Novel Marigold extract and CoQ10–loaded polyvinylpyrrolidone nanofibers intended for skin treatment and wound therapy were developed using the electrospinning technique. The presence of functional groups on the nanofibrous surfaces was confirmed by FTIR analysis, the SEM images show the average size of the obtained nanomats and the thermal properties were investigated via DSC analysis.
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Lungu, Lidia, Svetlana Blaja, Violeta Popescu, Alexandru Ciocarlan, Ion Dragalin i Aculina Aricu. "The dynamics of lavender and clary sage volatile oils adulteration on-air exposure". W Scientific seminar with international participation "New frontiers in natural product chemistry". Institute of Chemistry, Republic of Moldova, 2023. http://dx.doi.org/10.19261/nfnpc.2023.ab11.

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Industrially produced Lavender (Lavandula angustifolia L.) and Clary sage (Salvia sclarea Mill.) essential oils are frequently used as ingredients in aromatherapy, traditional medicine, perfumery and cosmetics [1]. The chemical composition of both fresh volatile oils is mainly determined by unsaturated sesquiterpenic hydrocarbons and their oxygenated derivatives, but the main constituents are linalool 1 (22-34%) and linalyl acetate 2 (34-62%). The quality of volatile oils depends a lot on the storage conditions. Their adulteration can be caused by autooxidation, especially of terpenic unsaturated hydrocarbons and the resulted hydroperoxides are harmful, and can cause skin conditions, including cancer [2]. The aim of this study was the determination of the dynamics of mentioned essential oils adulteration on-air exposure, compared to the linalool 1 and linalyl acetate 2 standards, under ambient conditions (25-30ºC) for 20 weeks. During this time, both standards oxidized completely, but in the case of linalool and linalyl acetate in analysed oils the rates of oxidation are insignificantly (~8%) (see Fig.). Also, the results showed that the content of hydrocarbons decreased 16.9%→0.8% (Lavender oil), 7.9%→0.9% (C. sage oil), and that of oxygenated derivative increased 82.5%→98.6% and 82.5%→96.4%, respectively (see Table). The visible difference between the oxidation dynamics of linalool and linalyl acetate from the composition of volatile oils and standard samples is influenced by the competition with mono- and sesquiterpene components for molecular oxygen.
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Raporty organizacyjne na temat "Sesquiterpenes"

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Joel, Daniel M., John C. Steffens i Alfred M. Mayer. Host-Elicited Germination and Mechanism of Penetration in Broomrape (Orobanche Spp.). United States Department of Agriculture, sierpień 1993. http://dx.doi.org/10.32747/1993.7568107.bard.

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Orobanche is an important parasitic weed. For developing novel methods for its control, a thorough understanding of crucial stages of its development is needed. Therefore, the objectives of this project were characterization of Orobanche germination stimulants, analysis of mechanisms of haustorial penetration, and characterization and isolation of penetration enzymes. The first highly potent natural germination stimulant for Orobanche was isolated from sunflower and identified by high-field 1D (1H and 13C), 2D (1H-1H COSY, HMQC, HMBC)-NMR, GC.FT-IR, and GC.MS as costuslactone, a guaiane type sesquiterpene lactone that resembles strigol only in possessing a lactone moiety that is required for activity. The first direct in situ evidence for the enzymatic nature of the infection process of a parasitic angiosperm was established. Pectin deesterification and depletion of pectins in host cell walls were shown adjacent to haustorial cells. Pectin methyl esterase and polygalacturonase were immunocytochemically detected in intrusive cells and in adjacent host apoplast. Orobanche tissues contain inhibitors of PGase activity. PME and three PGases were isolated from Orobanche calli. PME was characterized and purified, and antibodies were prepared against it. This study presents novel findings regarding parasitism in Orobanche, which may help to open up new approaches for controlling broomrapes.
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Westwood, James H., Yaakov Tadmor i Hanan Eizenberg. Identifying the genes involved in host root perception by root parasitic weeds: Genetic and transcriptomic analysis of Orobanche hybrids differing in signal response specificity. United States Department of Agriculture, styczeń 2013. http://dx.doi.org/10.32747/2013.7598145.bard.

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Seeds of the root parasitic plants of the genus Orobanchegerminate specifically in response to host-derived germination signals, which enables parasites to detect and attack preferred hosts. The best characterized class of germination stimulants is the strigolactones (SL), although some species respond to sesquiterpene lactones such as dehydrocostuslactone (DCL). Despite great progress in characterizing the SL signaling system in plants, the mechanism(s) by which parasite species detect specific compounds remains poorly understood. The goal of our project was to identify and characterize the genes responsible for stimulant specificity in O. cernuaand O. cumana. These two species are closely related, but differ in host range, with O. cernuaparasitizingSolanaceous crops such as tomato (and responding to SLs), and O. cumanaspecifically parasitizing sunflower (and responding to DCL). We used a genetic approach based on O. cernuax O. cumanahybrids to associate germination response with genes. We found that these parasite species each have multiple copies of KAI2d genes, which function in SL perception. In O. cernua, the OrceKAI2d2 responds to SL stimulants and is most consistently associated with hybrid lines that respond to SLs. For O. cumana, an apparently linked block of KAI2d genes was associated with response to DCL in hybrid lines, but we found no strong evidence that any of the OrcuKAI2d genes specifically recognize the DCL stimulant. Remarkably, one O. cumanagene, OrcuKAI2d5, responds to certain SLs in a genetic complementation assay, even though hybrid lines containing this gene show fidelity to DCL. In summary, we have identified the SL receptor in O. cernua, but the DCL receptor in O. cumanaremains unknown. Our data point to involvement of additional genes and yet greater levels of complexity regulating germination specificity in Orobanche. BARD Report - Project 4616 Page 2 of 8
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