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Owens, M. K.; Lin, Chii‐Dean; Taylor, Charles A.; Whisenant, Steven G.

doi:10.1023/a:1020793811615

Cited by 79 publications

(31 citation statements)

References 34 publications

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“…During the early steps of this experiment, we tried to correlate the single terpenoids with the measured flammability parameters; we observed that similar molecules belonging to the same terpenoid category produced very different (if not contrasting) effects, without any apparent pattern. This had been already evidenced by Owens et al (1998), who found opposite effects of similar terpenoids belonging to a same group (limonene and bornyl acetate) on flammability of Juniperus. The attempt to separate the effect of the single molecules may go over the real dynamic of a wildfire.…”

Section: Relationship Between Flammability Terpenoids and Fmcmentioning

confidence: 54%

“…Few previous studies focused on the identification of the major terpenoids molecules involved in flammability of vegetation (Owens et al 1998, Ormeño et al 2009, Pausas et al 2016) and investigated the terpenoids-FMC interaction (Alessio et al 2008a, De Lillis et al 2009). During the early steps of this experiment, we tried to correlate the single terpenoids with the measured flammability parameters; we observed that similar molecules belonging to the same terpenoid category produced very different (if not contrasting) effects, without any apparent pattern.…”

Section: Relationship Between Flammability Terpenoids and Fmcmentioning

confidence: 99%

“…Liodakis et al (2005) argued that the high flammability of Pinus halepensis could be linked to its storage of monoterpenoids. Owens et al (1998) provided evidence of the positive relationship between leaf flammability and limonene (monoterpenoid) concentration. Pausas et al (2016) recently confirmed that the capacity of Mediterranean plants to produce and store terpenoids can be considered as a flammability-enhancing trait.…”

Section: Introductionmentioning

confidence: 98%

“…On the other hand, the study of Alessio et al (2008b) found the effect of terpenoid content on leaf flammability to be minimal or negligible. The role of volatile terpenoid content in live fuel flammability was investigated taking into consideration mainly their total amount (De Lillis et al 2009) or the their most abundant fraction, the monoterpenoids, while less attention has been paid to the heavier volatile fraction of terpenoids (sesquiterpenoids - Owens et al 1998, Alessio et al 2008a, 2008b, Chetehouna et al 2009). …”

Section: Introductionmentioning

confidence: 99%

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Relevance of terpenoids on flammability of Mediterranean species: an experimental approach at a low radiant heat flux

Rocca¹,

Madrigal²,

Marchi³

et al. 2017

iForest

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One of the major factors influencing forest fuel combustion are terpenoids, a fraction of flammable Biogenic Volatile Organic Compounds (BVOCs) produced and stored by most Mediterranean species. The qualitative and quantitative effect of terpenoids on flammability has been only partially explained. In this study several major terpenoid-storing Mediterranean species (common cypress and three pines) were considered and compared to Holm oak as a reference non-storing species. The terpenoids were quantified via gas chromatography (GC-MS) analysis from both live fine fuel (LFF) and litter samples, and the relations between flammability and the terpenoids content were investigated by categories (Monoterpenoids, oxygenated Monoterpenoids, Sesquiterpenoids). The effect of fuel moisture content and species on ignition probability of LFF was also explored. A very different ignition probability was observed at the same fuel moisture content for the different species (Pinus spp. > C. sempervirens > Q. ilex). The stored terpenoids explained 19% to 50% of the whole flammability of both LFF and litter. Fuel moisture content (FMC) did not substantially change the relative effect of terpenoids on flammability, except in C. sempervirens. Monoterpenoids do not seem to significantly affect flammability, while sesquiterpenoids greatly influenced most flammability components, though their relative effect varied among species. A relation between storing structure of terpenoids and flammability was suggested. The results of this study indicate that isoprenoids should be included in physical models of the prediction and propagation of wildfire in Mediterranean vegetation as significant factors in driving flammability.

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Section: Relationship Between Flammability Terpenoids and Fmcmentioning

confidence: 54%

Section: Relationship Between Flammability Terpenoids and Fmcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Relevance of terpenoids on flammability of Mediterranean species: an experimental approach at a low radiant heat flux

Rocca¹,

Madrigal²,

Marchi³

et al. 2017

iForest

View full text Add to dashboard Cite

show abstract

“…However, most measurements of flammability traits involve small plant components, typically leaves or needles, small twigs, or litter (e.g. Owens et al 1998;Dimitrakopoulos and Papaioannou 2001;Kane et al 2008;Cornwell et al 2015). Such measurements accurately characterise the flammability of the chosen plant tissues and provide important information on surface fuels, but do not incorporate plant architecture, providing less ecologically meaningful results for canopy fuels than methods that use whole shoots or entire plants (Etlinger and Beall 2004;Jaureguiberry et al 2011;Schwilk 2015).…”

Section: Introductionmentioning

confidence: 99%

A quantitative assessment of shoot flammability for 60 tree and shrub species supports rankings based on expert opinion

Wyse

Perry

O'Connell

et al. 2016

Int. J. Wildland Fire

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Abstract. Fire is an important ecological disturbance in vegetated ecosystems across the globe, and also has considerable impacts on human infrastructure. Vegetation flammability is a key bottom-up control on fire regimes and on the nature of individual fires. Although New Zealand (NZ) historically had low fire frequencies, anthropogenic fires have considerably impacted indigenous vegetation as humans used fire extensively to clear forests. Few studies of vegetation flammability have been undertaken in NZ and only one has compared the flammability of indigenous plants; this was a qualitative assessment derived from expert opinion. We addressed this knowledge gap by measuring the flammability of terminal shoots from a range of trees and shrubs found in NZ. We quantified shoot flammability of 60 indigenous and exotic species, and compared our experimentally derived ranking with expert opinion. The most flammable species was the invasive exotic shrub Gorse (Ulex europaeus), followed by Manna Gum (Eucalyptus viminalis), K% umarahou (Pomaderris kumeraho), Rimu (Dacrydium cupressinum) and Silver Beech (Lophozonia menziesii). Our experimentally derived ranking was strongly correlated with expert opinion, lending support to both methods. Our results are useful to ecologists seeking to understand how fires have and will influence NZ's ecosystems, and for fire managers identifying high-risk landscapes, and low flammability species for 'green firebreaks'.

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Simple Plug‐In Synthetic Step for the Synthesis of (−)‐Camphor from Renewable Starting Materials

et al. 2021

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Racemic camphor and isoborneol are readily available as industrial side products, whereas (1R)-camphor is available from natural sources. Optically pure (1S)-camphor, however, is much more difficult to obtain. The synthesis of racemic camphor from α-pinene proceeds via an intermediary racemic isobornyl ester, which is then hydrolyzed and oxidized to give camphor. We reasoned that enantioselective hydrolysis of isobornyl esters would give facile access to optically pure isoborneol and camphor isomers, respectively. While screening of a set of commercial lipases and esterases in the kinetic resolution of racemic monoterpenols did not lead to the identification of any enantioselective enzymes, the cephalosporin Esterase B from Burkholderia gladioli (EstB) and Esterase C (EstC) from Rhodococcus rhodochrous showed outstanding enantioselectivity (E > 100) towards the butyryl esters of isoborneol, borneol and fenchol. The enantioselectivity was higher with increasing chain length of the acyl moiety of the substrate. The kinetic resolution of isobornyl butyrate can be easily integrated into the production of camphor from α-pinene and thus allows the facile synthesis of optically pure monoterpenols from a renewable side-product.

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Cited by 79 publications

References 34 publications

Relevance of terpenoids on flammability of Mediterranean species: an experimental approach at a low radiant heat flux

Relevance of terpenoids on flammability of Mediterranean species: an experimental approach at a low radiant heat flux

A quantitative assessment of shoot flammability for 60 tree and shrub species supports rankings based on expert opinion

Simple Plug‐In Synthetic Step for the Synthesis of (−)‐Camphor from Renewable Starting Materials

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