Author: Xiao, Wenbin ; Liu, Ting ; Guo, Jiajing ; Li, Gaoyang ; He, Mingwang ; Fu, Fuhua ; Li, Zixuan ; Shang, Xuebo ; Fu, Yanjiao ; Gao, Zhipeng ; Xiao, Yangbo ; Su, Donglin ; Shan, Yang ; Zhang, Tongping

The essential oil from Citrus changshan-huyou Y.B. Chang (HYEO) contains volatile compounds with strong inhibitory effects on biofilms formed on food processing equipment. This study analyzed the compositional changes of HYEO over 9 years and evaluated its antibacterial and antibiofilm properties. HYEO showed significant antibacterial activity during the first 8 years, effectively removing mature biofilms. Gas chromatography-mass spectrometry analysis revealed that monoterpenes were the primary components, with d-limonene and γ-terpenes converting into oxygenated derivatives during storage, resulting in a more than 16-fold increase in antibacterial activity. The antibacterial strength correlated with the number of oxygenated derivatives from limonene and terpinene among the top 20 components. Significant associations were observed between antibacterial activity and the oxygenated derivatives of d-limonene and γ-terpenes. These findings suggest the need for further investigation into their synergistic effects, antibacterial mechanisms, potential applications in food processing, and the safety profiles of the main antibacterial components of HYEO.

01 Apr 2025·Food Chemistry

Development and characterization of pectin films containing nanoemulsions of the essential oil from Thymus vulgaris for preserving salami

Article

Author: Vieira, Sofia Lara Silva ; Cardoso, Maria das Graças ; de Oliveira, Juliano Elvis ; Candido, Geraldo de Sousa ; Nelson, David Lee ; Ramos, Eduardo Mendes ; Alves, Eduardo ; Oliveira, Cassia Duarte ; Andrade, Bruna Fernandes ; de Souza, Luciano

Emulsions were prepared from T. vulgaris essential oil using the surfactants Pluronic F127 and Tween 80 by mechanical agitation (Emulsion_Tw and Emulsion_Pl) and sonication using an ultrasonic tip (Sonicated_emulsion_Tw and Sonicated_emulsion_Pl). These emulsions were incorporated into pectin films. The use of different surfactants reduced the volatility of T. vulgaris essential oil and, consequently, ensured the maintenance of its antioxidant activity for a longer period of time. Salami samples packaged with pectin films containing essential oil emulsions contained less oxidative aldehydes (51 and 54 total ion count × 10⁵) compared to salami samples packaged with films without essential oil (72 and 92 total ion count × 10⁵), demonstrating the fact that these active films can preserve product quality regardless of the surfactant used.

01 Apr 2025·Crop Protection

Potential of monoterpenes, phenylpropenes, and sesquiterpenes for the management Bemisia tabaci (Gennadius) biotype B (Hemiptera: Aleyrodidae)

Author: Hussein, Hanaa S. ; Eldesouky, Sahar E. ; Abdelgaleil, Samir A. M.

The insecticidal, repellent, and oviposition-deterrent activities of 13 phytochems. belonging to the monoterpene, phenylpropene, and sesquiterpene classes against Bemisia tabaci adults were evaluated on plants of tomato in laboratories and greenhouses.In the fumigant toxicity assay, p-cymene, α-terpinene, and α-pinene exhibited the highest fumigant toxicity with LC50 values of 9.64, 11.74, and 14.35μl/L air, resp.In the contact toxicity assay, trans-cinnamaldehyde caused the highest insecticidal activity (LC50 = 1.36 mg/L) followed by eugenol (1.42 mg/L).In contrast, farnesol, (Z, E)-nerolidol, α-pinene, α-terpinene, and p-cymene displayed a weak contact toxicity (LC50 > 10 mg/L).The highest contact toxicity in the greenhouse experiment was also observed with the trans-cinnamaldehyde (83.45%), followed by eugenol (80.62%), compared with thiamethoxam (87.75%) at 10 mg/L and 72h post-treatment.The maximum repellency was observed with trans-cinnamaldehyde (80.45%), eugenol (79.64%), (-)-citronellal (78.93%), (1R,2S,5R)-menthol (78.17%), and (-)-carvone (73.52%) at concentration of 10 mg/L after 24h compared to thiamethoxam (89.26%).Moreover, the greatest oviposition deterrence percentage was observed after 24 h for trans-cinnamaldehyde (52.30%), and eugenol (48.56%) at 10 mg/L compared to thiamethoxam (46.68%).The results indicate that these compounds may be employed as bioinsecticides for the control of B. tabaci.

100 Deals associated with Cymene

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