linear alcohols
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Author(s):  
Kaimin Hua ◽  
Xiaofang Liu ◽  
Junjun Chen ◽  
Baiyin Wei ◽  
Hui Wang ◽  
...  
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Insects ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 741
Author(s):  
Chiara D’Onofrio ◽  
Wolfgang Knoll ◽  
Paolo Pelosi

Aphid odorant-binding protein 9 is almost exclusively expressed in antennae and is well conserved between different aphid species. In order to investigate its function, we have expressed this protein and measured ligand-binding affinities to a number of common natural compounds. The best ligands are long-chain aldehydes and alcohols, in particular Z9-hexadecenal and Z11-hexadecenal, as well as 1-hexadecanol and Z11-1-hexadecenol. A model of this protein indicated Lys37 as the residue that is likely to establish strong interactions with the ligands, probably a Schiff base with aldehydes and a hydrogen bond with alcohols. Indeed, when we replaced this lysine with a leucine, the mutated protein lost its affinity to both long aldehydes and alcohols, while the binding of other volatiles was unaffected. Long-chain linear alcohols are common products of molds and have been reported as aphid antifeedants. Corresponding aldehydes, instead, are major components of sex pheromones for several species of Lepidoptera. We speculate that aphids might use OBP9 to avoid mold-contaminated plants as well as competition with lepidopteran larvae.


Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 415
Author(s):  
María Pérez-Jiménez ◽  
Carolina Muñoz-González ◽  
María Angeles Pozo-Bayón

The oral release behavior of wine aroma compounds was determined by using an in-mouth headspace sorptive extraction (HSSE) procedure. For this, 32 volunteers rinsed their mouths with a red wine. Aroma release was monitored at three time points (immediately, 60 s, and 120 s) after wine expectoration. Twenty-two aroma compounds belonging to different chemical classes were identified in the mouth. Despite the large inter-individual differences, some interesting trends in oral release behavior were observed depending on the chemical family. In general, esters and linear alcohols showed rapid losses in the mouth over the three sampling times and therefore showed a low oral aroma persistence. On the contrary, terpenes, lactones, and C13 norisoprenoids showed lower variations in oral aroma release over time, thus showing a higher oral aroma persistence. Additionally, and despite their low polarity, furanic acids and guaiacol showed the highest oral aroma persistence. This work represents the first large study regarding in-mouth aroma release behavior after wine tasting, using real wines, and it confirmed that oral release behavior does not only depend on the physicochemical properties of aroma compounds but also on other features, such as the molecular structure and probably, on the characteristics and composition of the oral environment.


Author(s):  
Masaki Kobayashi ◽  
Hiroki Yamaguchi ◽  
Takeyuki Suzuki ◽  
Yasushi Obora

A simple method for the cross β-alkylation of linear alcohols with benzyl alcohols in the presence of DMF-stabilized iridium nanoparticles was developed. Furthermore, a highly effective catalyst-recycling process was also developed.


2020 ◽  
Vol 34 (11) ◽  
pp. 14688-14707
Author(s):  
M. Pelucchi ◽  
S. Namysl ◽  
E. Ranzi ◽  
A. Rodriguez ◽  
C. Rizzo ◽  
...  

2020 ◽  
Vol 146 ◽  
pp. 106103 ◽  
Author(s):  
Ruslan N. Nagrimanov ◽  
Aizat A. Samatov ◽  
Tansu M. Nasyrova ◽  
Aleksey V. Buzyurov ◽  
Timur A. Mukhametzyanov ◽  
...  

2020 ◽  
Vol 22 (12) ◽  
pp. 6690-6697 ◽  
Author(s):  
Aman Jindal ◽  
Sukumaran Vasudevan

Hydrogen bonding OH···O geometries in the liquid state of linear alcohols, derived from ab initio MD simulations, show no change from methanol to pentanol, in contrast to that observed in their crystalline state.


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