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Journal articles on the topic 'Terpenes'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Soto, Ernesto R., Florentina Rus, Hanchen Li, et al. "Yeast Particle Encapsulation of Scaffolded Terpene Compounds for Controlled Terpene Release." Foods 10, no. 6 (2021): 1207. http://dx.doi.org/10.3390/foods10061207.

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Terpenes are naturally occurring compounds produced by plants that are of great commercial interest in the food, agricultural, cosmetic, and pharmaceutical industries due to their broad spectra of antibacterial, antifungal, anthelmintic, membrane permeation enhancement, and antioxidant biological activities. Applications of terpenes are often limited by their volatility and the need for surfactants or alcohols to produce stable, soluble (non-precipitated) products. Yeast particles (YPs) are hollow, porous microspheres that have been used for the encapsulation of terpenes (YP terpenes) by passi

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Soto, Ernesto R., Florentina Rus, and Gary R. Ostroff. "Yeast Particles Hyper-Loaded with Terpenes for Biocide Applications." Molecules 27, no. 11 (2022): 3580. http://dx.doi.org/10.3390/molecules27113580.

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Yeast particles (YPs) are 3–5 µm hollow and porous microspheres, a byproduct of some food grade yeast (Saccharomyces cerevisiae) extract manufacturing processes. Terpenes can be efficiently encapsulated inside YPs by passive diffusion through the porous cell walls. As previously published, this YP terpene encapsulation approach has been successfully implemented (1) to develop and commercialize fungicide and nematicide products for agricultural applications, (2) to co-load high potency agrochemical actives dissolved in terpenes or suitable solvents, and (3) to identify YP terpenes with broad-ac

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3

Niu, Yunwei, Xiaoxin Sun, Zuobing Xiao, Pinpin Wang, and Ruolin Wang. "Olfactory Impact of Terpene Alcohol on Terpenes Aroma Expression in Chrysanthemum Essential Oils." Molecules 23, no. 11 (2018): 2803. http://dx.doi.org/10.3390/molecules23112803.

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The key point of our work was evaluating the impact of terpene alcohols on the aroma expression of terpenes recombination in Chrysanthemum essential oils. Using pure commercial products, various aromatic recombinations were prepared, consisting of terpenes recombination and six terpene alcohols, all the concentrations found in Chrysanthemum essential oils. There were five groups of terpene alcohols mixtures performed very interesting with the addition or omission tests. The “olfactory threshold” of the terpenes recombination had a notable decrease when adding isoborneol, d-Fenchyl alcohol resp

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4

Nault, J. R., and Rene I. Alfaro. "Changes in cortical and wood terpenes in Sitka spruce in response to wounding." Canadian Journal of Forest Research 31, no. 9 (2001): 1561–68. http://dx.doi.org/10.1139/x01-082.

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Terpene levels were measured in bark and wood samples of Sitka spruce (Picea sitchensis (Bong.) Carrière) trees. The trees that had been selected as early or late flushing were subjected to artificial wounding to simulate attack by the white pine weevil, Pissodes strobi (Peck). Samples were taken at four times during the growing season: before wounding, shortly after wounding, and two times later in the season. Terpenes were extracted with hexane and quantified by capillary gas chromatography. There were no significant differences in total bark terpenes between early- and late-flushing trees o

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Weyerstahl, Peter, Helga Marschall-Weyerstahl, Josef Penninger, and Lutz Walther. "Terpenes and terpene derivatives-22." Tetrahedron 43, no. 22 (1987): 5287–98. http://dx.doi.org/10.1016/s0040-4020(01)87705-x.

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6

Liu, Jiajia, Man Lin, Penggang Han, Ge Yao, and Hui Jiang. "Biosynthesis Progress of High-Energy-Density Liquid Fuels Derived from Terpenes." Microorganisms 12, no. 4 (2024): 706. http://dx.doi.org/10.3390/microorganisms12040706.

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High-energy-density liquid fuels (HED fuels) are essential for volume-limited aerospace vehicles and could serve as energetic additives for conventional fuels. Terpene-derived HED biofuel is an important research field for green fuel synthesis. The direct extraction of terpenes from natural plants is environmentally unfriendly and costly. Designing efficient synthetic pathways in microorganisms to achieve high yields of terpenes shows great potential for the application of terpene-derived fuels. This review provides an overview of the current research progress of terpene-derived HED fuels, sur

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Mirza, Zeynep, Ernesto R. Soto, Yan Hu, et al. "Anthelmintic Activity of Yeast Particle-Encapsulated Terpenes." Molecules 25, no. 13 (2020): 2958. http://dx.doi.org/10.3390/molecules25132958.

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Soil-transmitted nematodes (STN) infect 1–2 billion of the poorest people worldwide. Only benzimidazoles are currently used in mass drug administration, with many instances of reduced activity. Terpenes are a class of compounds with anthelmintic activity. Thymol, a natural monoterpene phenol, was used to help eradicate hookworms in the U.S. South circa 1910. However, the use of terpenes as anthelmintics was discontinued because of adverse side effects associated with high doses and premature stomach absorption. Furthermore, the dose–response activity of specific terpenes against STNs has been

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Chenebault, Célia, Victoire Blanc-Garin, Marine Vincent, et al. "Exploring the Potential of the Model Cyanobacteria Synechococcus PCC 7002 and PCC 7942 for the Photoproduction of High-Value Terpenes: A Comparison with Synechocystis PCC 6803." Biomolecules 13, no. 3 (2023): 504. http://dx.doi.org/10.3390/biom13030504.

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We have performed the first comparative analysis of the potential of two physiologically-diverse model cyanobacteria, Synechococcus PCC 7002 (S.7002) and Synechococcus elongatus PCC 7942 (S.7942), for the photosynthetic production of four chemically-different high-value terpenes: two monoterpenes limonene and pinene, and two sesquiterpenes bisabolene and farnesene. We showed, for the first time, that S.7002 and S.7942 can produce farnesene and bisabolene, respectively. Both cyanobacteria produced farnesene (S.7942 produced more efficiently than S.7002) more efficiently than the other tested te

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9

Champagne, Emilie, Michaël Bonin, Alejandro A. Royo, Jean-Pierre Tremblay, and Patricia Raymond. "Predicting terpene content in dried conifer shoots using near infrared spectroscopy." Journal of Near Infrared Spectroscopy 28, no. 5-6 (2020): 308–14. http://dx.doi.org/10.1177/0967033520950516.

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Terpenes are phytochemicals found in multiple plant genera, especially aromatic herbs and conifers. Terpene content quantification is costly and complex, requiring the extraction of oil content and gas chromatography analyses. Near infrared (NIR) spectroscopy could provide an alternative quantitative method, especially if calibration can be developed with the spectra of dried plant material, which are easier and faster to acquire than oil-based spectra. Here, multispecies NIR spectroscopy calibrations were developed for total terpene content (mono- and sesquiterpenes) and for specific terpenes

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Sommano, Sarana Rose, Chuda Chittasupho, Warintorn Ruksiriwanich, and Pensak Jantrawut. "The Cannabis Terpenes." Molecules 25, no. 24 (2020): 5792. http://dx.doi.org/10.3390/molecules25245792.

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Terpenes are the primary constituents of essential oils and are responsible for the aroma characteristics of cannabis. Together with the cannabinoids, terpenes illustrate synergic and/or entourage effect and their interactions have only been speculated in for the last few decades. Hundreds of terpenes are identified that allude to cannabis sensory attributes, contributing largely to the consumer’s experiences and market price. They also enhance many therapeutic benefits, especially as aromatherapy. To shed light on the importance of terpenes in the cannabis industry, the purpose of this review

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11

Chen, Xinlu, Marcin Nowicki, Phillip A. Wadl, et al. "Chemical profile and analysis of biosynthetic pathways and genes of volatile terpenes in Pityopsis ruthii, a rare and endangered flowering plant." PLOS ONE 18, no. 6 (2023): e0287524. http://dx.doi.org/10.1371/journal.pone.0287524.

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It is critical to gather biological information about rare and endangered plants to incorporate into conservation efforts. The secondary metabolism of Pityopsis ruthii, an endangered flowering plant that only occurs along limited sections of two rivers (Ocoee and Hiwassee) in Tennessee, USA was studied. Our long-term goal is to understand the mechanisms behind P. ruthii’s adaptation to restricted areas in Tennessee. Here, we profiled the secondary metabolites, specifically in flowers, with a focus on terpenes, aiming to uncover the genomic and molecular basis of terpene biosynthesis in P. ruth

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12

King, Drew J., Roslyn M. Gleadow, and Ian E. Woodrow. "Terpene deployment in Eucalyptus polybractea; relationships with leafstructure, environmental stresses, and growth." Functional Plant Biology 31, no. 5 (2004): 451. http://dx.doi.org/10.1071/fp03217.

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Terpene deployment was examined in a population of Eucalyptus polybractea (R.Baker) trees. Eucalyptus polybractea is a terpene-accumulating species, which stores terpenes in oil glands beneath the leaf surface. Using regression analysis, we showed that leaf thickness, measured as leaf mass per area (LMA), influenced terpene content, apparently through regulation of gland dimensions, and thus, gland volume. We also examined how environmental factors affected terpene content through regulation of both LMA, and therefore, storage capacity, and the supply of resources for terpene synthesis. Neithe

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Bisht, B. S., Harshita Bankoti, and Tanuja Bharti. "A Review on Therapeutic Uses of Terpenoids." Journal of Drug Delivery and Therapeutics 11, no. 1-s (2021): 182–85. http://dx.doi.org/10.22270/jddt.v11i1-s.4523.

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Terpenes are a huge and assorted class of natural mixes, created by an assortment of plants, especially conifers, other plants and by some insects. Terpenes regularly have a solid smell and may ensure the plants that produce them by deterring herbivores and by pulling in hunters and parasites of herbivores. Terpene are the essential constituents of the basic oils of numerous kinds of plan Essential oils are utilized generally as aromas in perfumery and for example, fragrant healing. Manufactured varieties and subsidiaries of regular terpenes extraordinarily extend the assortment of fragrances

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14

Lai Shi Min, Shereen, Sook Yee Liew, Nelson Jeng Yeou Chear, Bey Hing Goh, Wen-Nee Tan, and Kooi Yeong Khaw. "Plant Terpenoids as the Promising Source of Cholinesterase Inhibitors for Anti-AD Therapy." Biology 11, no. 2 (2022): 307. http://dx.doi.org/10.3390/biology11020307.

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Plant-derived terpenes are the prolific source of modern drugs such as taxol, chloroquine and artemisinin, which are widely used to treat cancer and malaria infections. There are research interests in recent years on terpene-derived metabolites (diterpenes, triterpenes and sesquiterpenes), which are believed to serve as excellent cholinesterase inhibitors. As cholinesterase inhibitors are the current treatment for Alzheimer’s disease, terpene-derived metabolites will have the potential to be involved in the future drug development for Alzheimer’s disease. Hence, a bibliographic search was cond

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15

Zhao, Rui, Lihua Lu, Qingxing Shi, Jian Chen, and Yurong He. "Volatile Terpenes and Terpenoids from Workers and Queens of Monomorium chinense (Hymenoptera: Formicidae)." Molecules 23, no. 11 (2018): 2838. http://dx.doi.org/10.3390/molecules23112838.

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Twenty-one volatile terpenes and terpenoids were found in Monomorium chinense Santschi (Hymenoptera: Formicidae), a native Chinese ant, by using headspace solid-phase microextraction (HS-SPME) coupled with gas-phase chromatography and mass spectrometry (GC-MS), which makes this ant one of the most prolific terpene producers in insect. A sesquiterpene with unknown structure (terpene 1) was the main terpene in workers and neocembrene in queens. Terpenes and terpenoids were detected in poison, Dufour’s and mandibular glands of both workers and queens. Worker ants raised on a terpene-free diet sho

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16

Kemper, Katarina, Max Hirte, Markus Reinbold, Monika Fuchs, and Thomas Brück. "Opportunities and challenges for the sustainable production of structurally complex diterpenoids in recombinant microbial systems." Beilstein Journal of Organic Chemistry 13 (May 8, 2017): 845–54. http://dx.doi.org/10.3762/bjoc.13.85.

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With over 50.000 identified compounds terpenes are the largest and most structurally diverse group of natural products. They are ubiquitous in bacteria, plants, animals and fungi, conducting several biological functions such as cell wall components or defense mechanisms. Industrial applications entail among others pharmaceuticals, food additives, vitamins, fragrances, fuels and fuel additives. Central building blocks of all terpenes are the isoprenoid compounds isopentenyl diphosphate and dimethylallyl diphosphate. Bacteria like Escherichia coli harbor a native metabolic pathway for these isop

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17

Raz, Noa, Aharon M. Eyal, and Elyad M. Davidson. "Optimal Treatment with Cannabis Extracts Formulations Is Gained via Knowledge of Their Terpene Content and via Enrichment with Specifically Selected Monoterpenes and Monoterpenoids." Molecules 27, no. 20 (2022): 6920. http://dx.doi.org/10.3390/molecules27206920.

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Differences between therapeutic effects of medical cannabis inflorescences and those of their extracts are generally attributed to the differences in administration form and in the resultant pharmacokinetics. We hypothesized that difference may further extend to the composition of the actually consumed drug. Cannabinoid and terpene contents were compared between commercial cannabis inflorescences (n = 19) and decarboxylated extracts (n = 12), and between inflorescences and decarboxylated extracts produced from them (n = 10). While cannabinoid content was preserved in the extracts, a significan

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Tarasova, Ekaterina V., Natalia A. Luchnikova, Victoria V. Grishko, and Irina B. Ivshina. "Actinomycetes as Producers of Biologically Active Terpenoids: Current Trends and Patents." Pharmaceuticals 16, no. 6 (2023): 872. http://dx.doi.org/10.3390/ph16060872.

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Terpenes and their derivatives (terpenoids and meroterpenoids, in particular) constitute the largest class of natural compounds, which have valuable biological activities and are promising therapeutic agents. The present review assesses the biosynthetic capabilities of actinomycetes to produce various terpene derivatives; reports the main methodological approaches to searching for new terpenes and their derivatives; identifies the most active terpene producers among actinomycetes; and describes the chemical diversity and biological properties of the obtained compounds. Among terpene derivative

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Mahamat Ahmat, Yacoub, Sara Madadi, Luc Charbonneau, and Serge Kaliaguine. "Epoxidation of Terpenes." Catalysts 11, no. 7 (2021): 847. http://dx.doi.org/10.3390/catal11070847.

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Terpene epoxides are considered as potential primary intermediates in the synthesis of numerous green polymers including epoxy resins, polycarbonates, nonisocyanate polyurethanes and even some polyamides. In this chapter we describe recent efforts from our group to develop catalytic and noncatalytic processes for terpene epoxidation using a variety of oxidizing agents and process intensification methods. Most experimental tests deal with limonene epoxidation with applicability to some other terpenes also demonstrated.

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Jin, Jieyang, Shangrui Zhang, Mingyue Zhao та ін. "Scenarios of Genes-to-Terpenoids Network Led to the Identification of a Novel α/β-Farnesene/β-Ocimene Synthase in Camellia sinensis". International Journal of Molecular Sciences 21, № 2 (2020): 655. http://dx.doi.org/10.3390/ijms21020655.

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Terpenoids play vital roles in tea aroma quality and plants defense performance determination, whereas the scenarios of genes to metabolites of terpenes pathway remain uninvestigated in tea plants. Here, we report the use of an integrated approach combining metabolites, target gene transcripts and function analyses to reveal a gene-to-terpene network in tea plants. Forty-one terpenes including 26 monoterpenes, 14 sesquiterpenes and one triterpene were detected and 82 terpenes related genes were identified from five tissues of tea plants. Pearson correlation analysis resulted in genes to metabo

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Tomlin, Elizabeth S., John H. Borden, and Harold D. Pierce. "Relationship Between Volatile Foliar Terpenes and Resistance of Sitka Spruce to the White Pine Weevil." Forest Science 43, no. 4 (1997): 501–8. http://dx.doi.org/10.1093/forestscience/43.4.501.

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Abstract Volatile foliar terpenes were compared both quantitatively and qualitatively among 20 provenances and 11 cloned genotypes of Sitka spruce (Picea sitchensis Bong [Carr.]) that had been classified as resistant or susceptible to the white pine weevil (Pissodes strobi [Peck]). On average, trees in resistant provenances had significantly lower content of ten terpenes than in susceptible provenances. One resistant clone had significantly higher foliar terpene content, and four resistant clones had significantly lower content than susceptible trees. Thus clonal resistance could be expressed

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Wei, Junchi, Yun Yang, Ye Peng, et al. "Biosynthesis and the Transcriptional Regulation of Terpenoids in Tea Plants (Camellia sinensis)." International Journal of Molecular Sciences 24, no. 8 (2023): 6937. http://dx.doi.org/10.3390/ijms24086937.

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Terpenes, especially volatile terpenes, are important components of tea aroma due to their unique scents. They are also widely used in the cosmetic and medical industries. In addition, terpene emission can be induced by herbivory, wounding, light, low temperature, and other stress conditions, leading to plant defense responses and plant–plant interactions. The transcriptional levels of important core genes (including HMGR, DXS, and TPS) involved in terpenoid biosynthesis are up- or downregulated by the MYB, MYC, NAC, ERF, WRKY, and bHLH transcription factors. These regulators can bind to corre

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Yuan, Yuan, Yu Lei, Muwu Xu, Bingxin Zhao, and Shihai Xu. "Bioactive Terpenes from Marine Sponges and Their Associated Organisms." Marine Drugs 23, no. 3 (2025): 96. https://doi.org/10.3390/md23030096.

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In recent years, marine natural products have continued to serve as a pivotal resource for novel drug discovery. Globally, the number of studies focusing on Porifera has been on the rise, underscoring their considerable importance and research value. Marine sponges are prolific producers of a vast array of bioactive compounds, including terpenes, alkaloids, peptides, and numerous secondary metabolites. Over the past fifteen years, a substantial number of sponge-derived terpenes have been identified, exhibiting extensive structural diversity and notable biological activities. These terpenes hav

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Januszek, Magdalena, and Łukasz Wajda. "The Analysis of Correlations Between Terpene Transformations and Fermentation Type of Apple Musts." Acta Universitatis Cibiniensis. Series E: Food Technology 26, no. 1 (2022): 99–108. http://dx.doi.org/10.2478/aucft-2022-0008.

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Abstract We measured the concentration of 13 terpenes in musts of 3 different apple cultivars fermented spontaneously, with Ethanol RED yeast (Saccharomyces cerevisiae) or Cider Yeast (Saccharomyces bayanus). Then we analysed obtained data with PCA with various packages in R to assess how different types of fermentation and apple cultivars affected terpene profile. The most informative results of PCA were obtained in ‘psych’ package and they indicated that there were groups of terpenes which concentrations increased simultaneously, while for some other groups the content of particular compound

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Pfeiffer, T., O. Forberich, and F. J. Comes. "The contribution of the ozonolysis of terpenes to tropospheric OH concentrations." Canadian Journal of Physics 79, no. 2-3 (2001): 131–42. http://dx.doi.org/10.1139/p01-030.

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The recent finding that OH is formed as a direct product of the ozonolysis of terpenes is used to investigate the influence of this new OH source on the tropospheric OH budget applying model calculations. The results show that the OH production following UV photolysis of ozone leads to the main competition for ozonolysis at daytime. OH may increase considerably in its concentration as a result of the ozonolysis of terpenes at low photolysis frequencies, however, at high photolysis frequencies and moderate NOx concentrations this effect is reversed due to the fast reaction of OH with terpenes.

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Zhu, Xue-min, Yu Li, Fei Xu, et al. "Skin Electrical Resistance Measurement of Oxygen-Containing Terpenes as Penetration Enhancers: Role of Stratum Corneum Lipids." Molecules 24, no. 3 (2019): 523. http://dx.doi.org/10.3390/molecules24030523.

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The measurement of skin electrical resistance (SER) has drawn a great deal of attention for the rapid screening of transdermal penetration enhancers (PEs). However, the mechanisms underlying the SER measurement are still unclear. This study was to investigate the effects and mechanisms of seven oxygen-containing terpenes on the SER kinetics. Stratum corneum (SC) lipids were proved to play a key role in SER measurement. Then, the factors affecting the SER measurement were optimized. By the determination of SER kinetics, cyclic terpenes (1,8-cineole, terpinen-4-ol, menthol and α-terpineol) were

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Anand, Uma, Praveen Anand, and Mikael Hans Sodergren. "Terpenes in Cannabis sativa Inhibit Capsaicin Responses in Rat DRG Neurons via Na+/K+ ATPase Activation." International Journal of Molecular Sciences 24, no. 22 (2023): 16340. http://dx.doi.org/10.3390/ijms242216340.

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Terpenes in Cannabis sativa exert analgesic effects, but the mechanisms are uncertain. We examined the effects of 10 terpenes on capsaicin responses in an established model of neuronal hypersensitivity. Adult rat DRG neurons cultured with neurotrophic factors NGF and GDNF were loaded with Fura2AM for calcium imaging, and treated with individual terpenes or vehicle for 5 min, followed by 1 µMol capsaicin. In vehicle treated control experiments, capsaicin elicited immediate and sustained calcium influx. Most neurons treated with terpenes responded to capsaicin after 6–8 min. Few neurons showed i

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Li, Tuo, Ximeng Liu, Haoyu Xiang, Hehua Zhu, Xuan Lu, and Baomin Feng. "Two-Phase Fermentation Systems for Microbial Production of Plant-Derived Terpenes." Molecules 29, no. 5 (2024): 1127. http://dx.doi.org/10.3390/molecules29051127.

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Microbial cell factories, renowned for their economic and environmental benefits, have emerged as a key trend in academic and industrial areas, particularly in the fermentation of natural compounds. Among these, plant-derived terpenes stand out as a significant class of bioactive natural products. The large-scale production of such terpenes, exemplified by artemisinic acid—a crucial precursor to artemisinin—is now feasible through microbial cell factories. In the fermentation of terpenes, two-phase fermentation technology has been widely applied due to its unique advantages. It facilitates in

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Vladei, Natalia. "INFLUENCE OF ENZYMATIC TREATMENT AND STORAGE TEMPERATURE ON THE AROMATIC COMPOSITION OF VIORICA WINES." Journal of Engineering Science XXVII (4) (December 15, 2020): 163–71. https://doi.org/10.5281/zenodo.4288313.

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The subjects of this paper are the grapes and wines obtained from local selection variety Viorica from Republic of Moldova. Following the spectrophotometric analysis of grape juice, significant differences between the content of free volatile terpenes and potentially volatile terpenes were noticed. In order to determine the influence of the enzymatic treatment on flavor compounds, the wines were subjected to GC-MS analysis. The analysis showed that musts that were not treated with enzymes have a concentration of about 40% lower terpenes compared to those macerated with pectolytic enzymes. Wine

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Romero, Bastien, Catherine Fernandez, Caroline Lecareux, Elena Ormeño, and Anne Ganteaume. "How terpene content affects fuel flammability of wildland–urban interface vegetation." International Journal of Wildland Fire 28, no. 8 (2019): 614. http://dx.doi.org/10.1071/wf18210.

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Among plant characteristics promoting flammability, terpenes have received little attention, especially regarding the vegetation surrounding housing. Here, mono-, sesqui- and diterpenes were screened in live and dead leaves of ornamental species found in wildland–urban interfaces (WUIs) of south-eastern France. Terpene content and composition were compared among species and between fuel types. Their influence on flammability was assessed through several variables and compared with that of leaf thickness and moisture content. Six of the 17 species examined contained terpenes. Terpene diversity

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Wagner, Jasmin K., Ella Gambell, Tucker Gibbons, Thomas J. Martin та Joshua S. Kaplan. "Sex Differences in the Anxiolytic Properties of Common Cannabis Terpenes, Linalool and β-Myrcene, in Mice". NeuroSci 5, № 4 (2024): 635–49. https://doi.org/10.3390/neurosci5040045.

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Volatile organic compounds, colloquially referred to as “terpenes”, have been proposed to impact the therapeutic qualities that are traditionally ascribed to cannabis. However, the contribution of these terpenes in anxiety, at relevant levels and exposure methods common with cannabis use, is lacking empirical assessment. We tested the anxiolytic properties of two prominent cannabis terpenes, linalool and β-myrcene, in male and female mice using short duration vapor pulls to model human inhalation when combusting flower or vaping cannabis oil. We observed sex differences in the locomotor effect

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Kotsinis, Vasileios, Alexandros Dritsoulas, Dionysios Ntinokas, and Ioannis O. Giannakou. "Nematicidal Effects of Four Terpenes Differ among Entomopathogenic Nematode Species." Agriculture 13, no. 6 (2023): 1143. http://dx.doi.org/10.3390/agriculture13061143.

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Entomopathogenic nematodes (EPNs) have been studied for more than half a century, and employed for insect pest management using augmentation, conservation, and classical biological control approaches. As obligate lethal parasitoids of insect larvae, EPN navigate a chemically complex soil environment and interact with their insect hosts, plants, and each other. EPN responses to various terpenes, such as herbivore-induced plant volatiles, have the potential to enhance EPN efficacy through their attraction. However, several of the terpenes are currently being formulated as biological fungicides,

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Nault, Jason R. "Site temperatures influence seasonal changes in terpene composition in Douglas-fir vegetative buds and current-year foliage." Canadian Journal of Forest Research 33, no. 11 (2003): 2269–73. http://dx.doi.org/10.1139/x03-151.

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Over a 3-year period (19982000), variations in terpene composition was measured in vegetative buds of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) from six sites varying in elevation and geographic location with sampling from early spring to midsummer. Eleven terpenes were found in virtually all samples (tricyclene, α-pinene, camphene, sabinene, β-pinene, myrcene, Δ-3-carene, limonene, β-phellandrene, terpinolene, and bornyl acetate) and represented an average of 87% of the total terpenes. In each year, composition of the terpene mix varied significantly (P [Formula: see text] 0.05) for

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Fauss, Jürgen, Claudia Reinmuth, and Matthias Weigl. "6 P-Cymene Formation by Oxidation of Cyclohexadiene Monoterpenes – a Pitfall in Air Sampling of Terpenes." Annals of Work Exposures and Health 67, Supplement_1 (2023): i18. http://dx.doi.org/10.1093/annweh/wxac087.046.

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Abstract It has been known for a long time that certain terpenes are sensitive to oxidation. Especially in the presence of small amounts, as is the case in the environment or indoors, changes occur due to UV light or ozone exposition. Various oxidized products have also been detected when sampling low terpene concentrations using Tenax® tubes and subsequent thermal desorption. Here we show that carrying out common air sampling of monoterpenes in the lower ppm range on charcoal tubes, the atmospheric oxygen is sufficient to oxidize the most sensitive terpenes to a considerable extent, forming a

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Lee, Sangin, Eun Jae Kim, Eunjeong Kwon, et al. "Identification of Terpene Compositions in the Leaves and Inflorescences of Hybrid Cannabis Species Using Headspace-Gas Chromatography/Mass Spectrometry." Molecules 28, no. 24 (2023): 8082. http://dx.doi.org/10.3390/molecules28248082.

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Although cannabidiol and tetrahydrocannabinol in Cannabis species exert their pharmacological effects via the endocannabinoid system, it is believed that other phytochemicals, particularly terpenes, can modulate therapeutic outcomes through the entourage effect. Therefore, to gain a better understanding of the pharmacological effects of Cannabis, obtaining information on phytochemical compositions, including mono-, di-, and sesqui-terpenes in Cannabis species is essential. Applying a sophisticated analytical method is indispensable. In this study, headspace-gas chromatography/mass spectrometry

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36

Weyerstahl, Peter, and Ina Schwope. "Terpenes and terpene derivatives, XXXIV. Synthesis ofrac-porosadienone." Liebigs Annalen 1995, no. 1 (1995): 191–93. http://dx.doi.org/10.1002/jlac.199519950126.

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Kainulainen, P., J. Oksanen, V. Palomäki, J. K. Holopainen, and T. Holopainen. "Effect of drought and waterlogging stress on needle monoterpenes of Picea abies." Canadian Journal of Botany 70, no. 8 (1992): 1613–16. http://dx.doi.org/10.1139/b92-203.

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Monoterpenes were analysed in needles of clonal Picea abies (L.) Karst. exposed to drought and waterlogging. In drought-stressed trees the amounts of tricyclene, α-pinene, and camphene were significantly (p < 0.05) higher than in the control trees. In the drought treatment the total terpene concentration was also significantly (p < 0.05) higher. Waterlogging did not have significant effects on individual terpenes and total terpene concentration. However, multivariate redundancy analysis indicated that the effect of treatments on all the compounds simultaneously was not significant (p = 0

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Bustos-Segura, Carlos, Shannon Dillon, Andras Keszei, William J. Foley, and Carsten Külheim. "Intraspecific diversity of terpenes of Eucalyptus camaldulensis (Myrtaceae) at a continental scale." Australian Journal of Botany 65, no. 3 (2017): 257. http://dx.doi.org/10.1071/bt16183.

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Plants show a high degree of intraspecific variation in several traits including plant secondary metabolites. This variation can be influenced by genetic and environmental factors that result in geographical structure in their distribution. By growing plants from several populations in a controlled environment, we studied variation in foliar terpenes in Eucalyptus camaldulensis, which is the widest distributed eucalypt, with a large range both latitudinally and longitudinally. We found that the concentration of terpenes is highly variable among subspecies. We identified four chemotypes dominat

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Ji, Wensu, and Xiaoyue Ji. "Comparative Analysis of Volatile Terpenes and Terpenoids in the Leaves of Pinus Species—A Potentially Abundant Renewable Resource." Molecules 26, no. 17 (2021): 5244. http://dx.doi.org/10.3390/molecules26175244.

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Pinaceae plants are widely distributed in the world, and the resources of pine leaves are abundant. In the extensive literature concerning Pinus species, there is much data on the composition and the content of essential oil of leaves. Still, a detailed comparative analysis of volatile terpenes and terpenoids between different species is missing. In this paper, headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry was used to determine the volatile terpenes and terpenoids of typical Pinus species in China. A total of 46 volatile terpenes and terpenoids were id

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Mahizan, Nik Amirah, Shun-Kai Yang, Chew-Li Moo, et al. "Terpene Derivatives as a Potential Agent against Antimicrobial Resistance (AMR) Pathogens." Molecules 24, no. 14 (2019): 2631. http://dx.doi.org/10.3390/molecules24142631.

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The evolution of antimicrobial resistance (AMR) in pathogens has prompted extensive research to find alternative therapeutics. Plants rich with natural secondary metabolites are one of the go-to reservoirs for discovery of potential resources to alleviate this problem. Terpenes and their derivatives comprising of hydrocarbons, are usually found in essential oils (EOs). They have been reported to have potent antimicrobial activity, exhibiting bacteriostatic and bactericidal effects against tested pathogens. This brief review discusses the activity of terpenes and derivatives against pathogenic

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Wei, Qiuhui, Kaer Lan, Yuyang Liu, et al. "Transcriptome analysis reveals regulation mechanism of methyl jasmonate-induced terpenes biosynthesis in Curcuma wenyujin." PLOS ONE 17, no. 6 (2022): e0270309. http://dx.doi.org/10.1371/journal.pone.0270309.

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Curcuma wenyujin is the source plant of three traditional Chinese medicines, which have been widely used in clinical treatment over 1000 years. The content of terpenes, the major medicinal active ingredients, is relatively low in this plant. Studies have shown that MeJA can promote terpenes biosynthesis in plants. However, the mechanism underlying the effect of MeJA in C. wenyujin remains unclear. In this work, the transcriptome of C. wenyujin leaves with MeJA treatment was analyzed to elucidate the regulation mechanism of MeJA-mediated terpene biosynthesis. Based on the RNA-seq data, 7,246 un

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Yang, Limeng, Huan Liu, Yuhan Jin, Junfeng Liu, Li Deng, and Fang Wang. "Recent Advances in Multiple Strategies for the Synthesis of Terpenes by Engineered Yeast." Fermentation 8, no. 11 (2022): 615. http://dx.doi.org/10.3390/fermentation8110615.

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Terpenes are an important class of natural secondary metabolites with a wide range of applications in food, pharmaceuticals, and biofuels. Currently, the traditional production methods of terpenes almost depend on plant extraction and chemical conversion. The plant extraction method consumes a lot of natural resources and makes it difficult to separate the target compound from the extractives, while the chemical conversion method has a complex synthesis route and leads to severe environmental pollution. Compared to plant extraction and chemical conversion methods, the microbial synthesis metho

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Harwood, Stephen J., Maximilian D. Palkowitz, Cara N. Gannett, et al. "Modular terpene synthesis enabled by mild electrochemical couplings." Science 375, no. 6582 (2022): 745–52. http://dx.doi.org/10.1126/science.abn1395.

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The synthesis of terpenes is a large field of research that is woven deeply into the history of chemistry. Terpene biosynthesis is a case study of how the logic of a modular design can lead to diverse structures with unparalleled efficiency. This work leverages modern nickel-catalyzed electrochemical sp 2 –sp 3 decarboxylative coupling reactions, enabled by silver nanoparticle–modified electrodes, to intuitively assemble terpene natural products and complex polyenes by using simple modular building blocks. The step change in efficiency of this approach is exemplified through the scalable prepa

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Hosseini, Morteza, and David M. Pereira. "The Chemical Space of Terpenes: Insights from Data Science and AI." Pharmaceuticals 16, no. 2 (2023): 202. http://dx.doi.org/10.3390/ph16020202.

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Terpenes are a widespread class of natural products with significant chemical and biological diversity, and many of these molecules have already made their way into medicines. In this work, we employ a data science-based approach to identify, compile, and characterize the diversity of terpenes currently known in a systematic way, in a total of 59,833 molecules. We also employed several methods for the purpose of classifying terpene subclasses using their physicochemical descriptors. Light gradient boosting machine, k-nearest neighbours, random forests, Gaussian naïve Bayes and Multilayer perce

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Chen, Xinlu, Tobias G. Köllner, Qidong Jia, et al. "Terpene synthase genes in eukaryotes beyond plants and fungi: Occurrence in social amoebae." Proceedings of the National Academy of Sciences 113, no. 43 (2016): 12132–37. http://dx.doi.org/10.1073/pnas.1610379113.

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Terpenes are structurally diverse natural products involved in many ecological interactions. The pivotal enzymes for terpene biosynthesis, terpene synthases (TPSs), had been described only in plants and fungi in the eukaryotic domain. In this report, we systematically analyzed the genome sequences of a broad range of nonplant/nonfungus eukaryotes and identified putative TPS genes in six species of amoebae, five of which are multicellular social amoebae from the order of Dictyosteliida. A phylogenetic analysis revealed that amoebal TPSs are evolutionarily more closely related to fungal TPSs tha

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Lourencon, Raquel, Steven P. Hart, Terry A. Gipson, Bob Adams, and Davila Rassi. "192 Terpenes as antinutritive chemicals in red cedar." Journal of Animal Science 97, Supplement_1 (2019): 77. http://dx.doi.org/10.1093/jas/skz053.175.

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Abstract At some research sites goats aggressively consumed red cedar (Juniperus virginiana) throughout the year, while at other sites goats consumed little cedar, although they consumed more cedar in winter. It was hypothesized that differences in red cedar intake may be caused by terpenes. The purpose of this study was to measure terpenes in cedar needles at different locations and times of the year. Ninety-one samples of red cedar needles were obtained from four locations (Langston, OK; Midwest City, OK; Mannford, OK; Neosho, MO) at monthly intervals over a 2-yr period. Needles were manuall

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Miao, Wen, Jiaqiang Luo, Junda Liu, Kate Howell, and Pangzhen Zhang. "The Influence of UV on the Production of Free Terpenes in Vitis vinifera cv. Shiraz." Agronomy 10, no. 9 (2020): 1431. http://dx.doi.org/10.3390/agronomy10091431.

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Terpenes contribute to the desirable flavour and aroma of grapes and wine. The biosynthesis of these plant secondary metabolites is influenced by both physiological and environmental factors, such as grapevine phenological stage and sunlight exposure. In this study, we investigated the influence of ultraviolet (UV) at different grapevine phenological stages on free terpenes in grape at harvest. Two types of transparent polymer films were applied to grape bunches to eliminate both UV-A and UV-B or only eliminate UV-B, followed by the identification and quantification of terpenes using headspace

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L. Simakova, Irina, Andrey V. Simakov, and Dmitry Yu. Murzin. "Valorization of Biomass Derived Terpene Compounds by Catalytic Amination." Catalysts 8, no. 9 (2018): 365. http://dx.doi.org/10.3390/catal8090365.

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This review fills an apparent gap existing in the literature by providing an overview of the readily available terpenes and existing catalytic protocols for preparation of terpene-derived amines. To address the role of solid catalysts in amination of terpenes the same reactions with homogeneous counterparts are also discussed. Such catalysts can be considered as a benchmark, which solid catalysts should match. Although catalytic systems based on transition metal complexes have been developed for synthesis of amines to a larger extent, there is an apparent need to reduce the production costs. S

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Du, Zhihui, Xiyu Yang, Shuting Zhou, et al. "Aromatic Terpenes and Their Biosynthesis in Dendrobium, and Conjecture on the Botanical Perfumer Mechanism." Current Issues in Molecular Biology 45, no. 7 (2023): 5305–16. http://dx.doi.org/10.3390/cimb45070337.

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This review presents a systematic analysis of the studies on volatiles in Dendrobium. Among the various components, aromatic terpenes are a crucial component in the development of the aromatic characteristics of Dendrobium and other plants. Recent advancements in detection and sequencing technology have resulted in a considerable rise in research on the biosynthetic processes of aromatic terpenes in Dendrobium and other flowering plants. Nevertheless, the inquiry into the precise means by which plants regulate the proportion of diverse aromatic terpenes in their floral scent, thereby preservin

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Makowski, Mathias, and Martin Ohlmeyer. "Influences of hot pressing temperature and surface structure on VOC emissions from OSB made of Scots pine." Holzforschung 60, no. 5 (2006): 533–38. http://dx.doi.org/10.1515/hf.2006.088.

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Abstract Oriented strand board (OSB) made of Scots pine (Pinus sylvestris L.) releases high amounts of terpenes and aldehydes. These volatile organic compound (VOC) emissions are clearly affected by the manufacturing parameters. As a consequence of high temperatures during hot pressing, terpene emissions from OSB are reduced. Aldehyde emissions are initially lowered after pressing at a high temperature (260°C). Furthermore, emissions are influenced by the surface structure. If the surface consists of fine particles, terpene emissions are lowered and the course of aldehyde formation is altered.

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