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Formulation optimization of D-limonene-loaded nanoemulsions as a natural and efficient biopesticide
Colloids and Surfaces A: Physicochemical and Engineering Aspects ( IF 5.2 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.colsurfa.2020.124746 Jianguo Feng , Rong Wang , Zhiyang Chen , Shengwei Zhang , Shuzhong Yuan , Hongen Cao , Seid Mahdi Jafari , Wenchao Yang
Colloids and Surfaces A: Physicochemical and Engineering Aspects ( IF 5.2 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.colsurfa.2020.124746 Jianguo Feng , Rong Wang , Zhiyang Chen , Shengwei Zhang , Shuzhong Yuan , Hongen Cao , Seid Mahdi Jafari , Wenchao Yang
Abstract D-limonene is an important constituent of citrus fruits, such as oranges and lemons, and can be extracted as a natural essential oil for controlling the agricultural pests because of its antifungal and insecticidal activities. However, the hydrophobicity of D-limonene hinders its full potential and excellent performance. In this research, the effect of emulsifier type, dosage, and emulsification method on the formation and stability of D-limonene-loaded nanoemulsions was investigated by sample appearance, microstructural observations, droplet size measurement, and multiple light scattering analysis. Nanoemulsions prepared with emulsifier (EL-40) exhibited the highest stability, with an appropriate HLB (Hydrophilic Lipophilic Balance) value of 13.5. The stability of nanoemulsions increased at higher emulsifier dosage from 2% to 6%. Also, nanoemulsions fabricated by dropwise addition of aqueous phase (deionized water) into D-limonene as the oil phase premixed with emulsifier were the most stable samples. The optimized formulation of D-limonene-loaded nanoemulsions was determined as: 10 % D-limonene, 6% EL-40, and 84 % deionized water. The quality indicators of this formulation were acceptable in terms of FAO standards. Finally, D-limonene-loaded nanoemulsions could inhibit the growth of various fungal pathogens, including Pyricularia oryzae (rice blast), Rhizoctonia solani (rice sheath blight), Colletortrichum gloeosporiodes (pepper anthracnose), and Phomopsis amygdali (peach shoot blight). This research provides a practical solution for the formulation of stable and effective nanoemulsions containing D-limonene for the control of agricultural crop diseases.
中文翻译:
D-柠檬烯纳米乳作为天然高效生物农药的配方优化
摘要 D-柠檬烯是柑桔、柠檬等柑橘类水果的重要成分,具有抗真菌和杀虫活性,可作为天然精油用于防治农业害虫。然而,D-柠檬烯的疏水性阻碍了其充分发挥潜力和优异的性能。在本研究中,通过样品外观、微观结构观察、液滴尺寸测量和多重光散射分析,研究了乳化剂类型、用量和乳化方法对 D-柠檬烯负载纳米乳的形成和稳定性的影响。用乳化剂 (EL-40) 制备的纳米乳液表现出最高的稳定性,适当的 HLB(亲水亲油平衡)值为 13.5。纳米乳液的稳定性在较高的乳化剂用量下从 2% 增加到 6%。还,通过将水相(去离子水)逐滴添加到 D-柠檬烯中制备的纳米乳剂是最稳定的样品。负载 D-柠檬烯的纳米乳液的优化配方确定为:10% D-柠檬烯、6% EL-40 和 84% 去离子水。根据粮农组织的标准,该配方的质量指标是可以接受的。最后,载有 D-柠檬烯的纳米乳剂可以抑制多种真菌病原体的生长,包括稻瘟病菌(稻瘟病)、立枯丝核菌(水稻纹枯病)、胶状炭疽病菌(辣椒炭疽病)和杏仁状芽孢杆菌(桃梢枯病)。该研究为制备稳定有效的含有 D-柠檬烯的纳米乳剂用于控制农作物病害提供了实用的解决方案。
更新日期:2020-07-01
中文翻译:
D-柠檬烯纳米乳作为天然高效生物农药的配方优化
摘要 D-柠檬烯是柑桔、柠檬等柑橘类水果的重要成分,具有抗真菌和杀虫活性,可作为天然精油用于防治农业害虫。然而,D-柠檬烯的疏水性阻碍了其充分发挥潜力和优异的性能。在本研究中,通过样品外观、微观结构观察、液滴尺寸测量和多重光散射分析,研究了乳化剂类型、用量和乳化方法对 D-柠檬烯负载纳米乳的形成和稳定性的影响。用乳化剂 (EL-40) 制备的纳米乳液表现出最高的稳定性,适当的 HLB(亲水亲油平衡)值为 13.5。纳米乳液的稳定性在较高的乳化剂用量下从 2% 增加到 6%。还,通过将水相(去离子水)逐滴添加到 D-柠檬烯中制备的纳米乳剂是最稳定的样品。负载 D-柠檬烯的纳米乳液的优化配方确定为:10% D-柠檬烯、6% EL-40 和 84% 去离子水。根据粮农组织的标准,该配方的质量指标是可以接受的。最后,载有 D-柠檬烯的纳米乳剂可以抑制多种真菌病原体的生长,包括稻瘟病菌(稻瘟病)、立枯丝核菌(水稻纹枯病)、胶状炭疽病菌(辣椒炭疽病)和杏仁状芽孢杆菌(桃梢枯病)。该研究为制备稳定有效的含有 D-柠檬烯的纳米乳剂用于控制农作物病害提供了实用的解决方案。