The Experts below are selected from a list of 3363 Experts worldwide ranked by ideXlab platform
Justin O. Schmidt - One of the best experts on this subject based on the ideXlab platform.
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Repellency of the Components of the Essential Oil, Citronella, to Triatoma rubida , Triatoma protracta , and Triatoma recurva (Hemiptera: Reduviidae: Triatominae)
Journal of medical entomology, 2015Co-Authors: D. Zamora, Stephen A. Klotz, Edward A. Meister, Justin O. SchmidtAbstract:The kissing bugs--Triatoma rubida (Uhler), Triatoma protracta (Uhler), and Triatoma recurva (Stal)--are common hematophagous bugs in southeastern Arizona and responsible for severe allergic reactions in some individuals who are bitten. They also possess the potential to transmit the blood parasite, Trypanosoma cruzi. We previously found the essential oil, Citronella, to be an excellent deterrent of feeding of T. rubida on a restrained mouse. In this work, we tested major components--alcohols, aldehydes, and monoterpenes--of Citronella oil for repellency against the three common triatome species endemic in southern Arizona. The following Citronella oil components--geraniol, citronellol, limonene, and Citronellal--in different concentrations and combinations were tested. All components of Citronella oil demonstrated some inhibition of feeding, ranging from very weak inhibition (limonene) to significant inhibition (geraniol and citronellol). A mixture of geraniol and citronellol was found to be repellant at concentrations of .165 and .165 vol%, respectively, for all three triatome species. Citronellal and limonene had no significant repellent activity. The repellent activity of Citronella oil appears to be acting through direct contact with the bugs rather than diffusion of vapors.
Jitendra Kumar - One of the best experts on this subject based on the ideXlab platform.
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antifungal activity of nano emulsions of neem and Citronella oils against phytopathogenic fungi rhizoctonia solani and sclerotium rolfsii
Industrial Crops and Products, 2017Co-Authors: Eisa Osman Mohamed Ali, N A Shakil, Virendra S Rana, Dhruba Jyoti Sarkar, Sujan Majumder, Parshant Kaushik, Braj B Singh, Jitendra KumarAbstract:Abstract Biopesticides are considered to be safe, target specific, biodegradable and eco-friendly. These, especially Azadirachta indica A. Juss. (neem) based biopesticides, are mainly used as emulsified concentrate (EC). There is growing interest in nano emulsions based on phytochemical mixtures due to their better efficacy compared to conventional biopesticides. A. indica seed oil and Cymbopogon nardus (L.) Rendle (Citronella) oil are known to have pest control properties. However, their utilization is often restricted due to relatively low water solubility. This drawback can be overcome by encapsulating oils in oil-in-water (O/W) emulsions or nano emulsions using low or high energy methods. In this study, various nano emulsions of crude neem and Citronella oils with surfactants were developed and characterised by Dynamic Light Scattering (DLS) and Transmission Electron Microscope (TEM). Composition of various ingredients of nano emulsions was standardised. TEM study showed the spherical shape of neem and Citronella oil nano emulsions. The average size of droplets of neem nano emulsion (NNE) with different percentage of Citronella oil ranged from 11.23 ± 3.86 nm to 17.80 ± 4.52 nm while that of Citronella nano emulsion (CNE) with different percentage of neem oil ranged from 8.12 ± 2.80 nm to 12.04 ± 3.74 nm. It was found that increase in surfactant ratio to neem oil or Citronella oil decreases the size of droplets in nano emulsions. Further, in vitro antifungal study of against Rhizoctonia solani and Sclerotium rolfsii was carried out by poisoned food technique. Results showed that neem nano emulsion 10 (NNE10) and Citronella nano emulsion 10 (CNE10) were most active against R. solani (ED 50 13.67 mg L −1 and 25.64 mg L −1 ) and S. rolfsii (ED 50 14.71 mg L −1 and 20.88 mg L −1 ). The standardization of the composition and development of Citronella essential oil and neem oil based nano emulsions and their antifungal activity against these two fungi has been reported for the first time.
Eder J Lenardao - One of the best experts on this subject based on the ideXlab platform.
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clean and atom economic synthesis of octahydroacridines application to essential oil of Citronella
Tetrahedron Letters, 2003Co-Authors: Raquel G Jacob, Gelson Perin, Giancarlo V Botteselle, Eder J LenardaoAbstract:Abstract A green and efficient method for the synthesis of octahydroacridine (OHA) has been developed by a simple one-pot hetero-Diels–Alder reaction starting from (+)-Citronellal and N -arylamines in the presence of a solid supported catalyst (SiO 2 /ZnCl 2 ), under MW irradiation and without any solvent. The method was used in the direct preparation of OHA from Citronella oil in good yield.
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green synthesis of isopulegol from Citronellal application to essential oil of Citronella
Tetrahedron Letters, 2003Co-Authors: Raquel G Jacob, Gelson Perin, Leticia N Loi, Claudia S Pinno, Eder J LenardaoAbstract:A simple green and efficient method has been developed for the synthesis of (−)-isopulegol from (+)-Citronellal in the presence of a solid supported catalyst (SiO2/ZnCl2), under solvent-free conditions and MW irradiation. It was also found that the same technology is applicable to the direct preparation of (−)-isopulegol from the essential oil of Citronella (Cymbopogon nardus, growing in southern Brazil) in excellent yield.
D. Zamora - One of the best experts on this subject based on the ideXlab platform.
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Repellency of the Components of the Essential Oil, Citronella, to Triatoma rubida , Triatoma protracta , and Triatoma recurva (Hemiptera: Reduviidae: Triatominae)
Journal of medical entomology, 2015Co-Authors: D. Zamora, Stephen A. Klotz, Edward A. Meister, Justin O. SchmidtAbstract:The kissing bugs--Triatoma rubida (Uhler), Triatoma protracta (Uhler), and Triatoma recurva (Stal)--are common hematophagous bugs in southeastern Arizona and responsible for severe allergic reactions in some individuals who are bitten. They also possess the potential to transmit the blood parasite, Trypanosoma cruzi. We previously found the essential oil, Citronella, to be an excellent deterrent of feeding of T. rubida on a restrained mouse. In this work, we tested major components--alcohols, aldehydes, and monoterpenes--of Citronella oil for repellency against the three common triatome species endemic in southern Arizona. The following Citronella oil components--geraniol, citronellol, limonene, and Citronellal--in different concentrations and combinations were tested. All components of Citronella oil demonstrated some inhibition of feeding, ranging from very weak inhibition (limonene) to significant inhibition (geraniol and citronellol). A mixture of geraniol and citronellol was found to be repellant at concentrations of .165 and .165 vol%, respectively, for all three triatome species. Citronellal and limonene had no significant repellent activity. The repellent activity of Citronella oil appears to be acting through direct contact with the bugs rather than diffusion of vapors.
Eisa Osman Mohamed Ali - One of the best experts on this subject based on the ideXlab platform.
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antifungal activity of nano emulsions of neem and Citronella oils against phytopathogenic fungi rhizoctonia solani and sclerotium rolfsii
Industrial Crops and Products, 2017Co-Authors: Eisa Osman Mohamed Ali, N A Shakil, Virendra S Rana, Dhruba Jyoti Sarkar, Sujan Majumder, Parshant Kaushik, Braj B Singh, Jitendra KumarAbstract:Abstract Biopesticides are considered to be safe, target specific, biodegradable and eco-friendly. These, especially Azadirachta indica A. Juss. (neem) based biopesticides, are mainly used as emulsified concentrate (EC). There is growing interest in nano emulsions based on phytochemical mixtures due to their better efficacy compared to conventional biopesticides. A. indica seed oil and Cymbopogon nardus (L.) Rendle (Citronella) oil are known to have pest control properties. However, their utilization is often restricted due to relatively low water solubility. This drawback can be overcome by encapsulating oils in oil-in-water (O/W) emulsions or nano emulsions using low or high energy methods. In this study, various nano emulsions of crude neem and Citronella oils with surfactants were developed and characterised by Dynamic Light Scattering (DLS) and Transmission Electron Microscope (TEM). Composition of various ingredients of nano emulsions was standardised. TEM study showed the spherical shape of neem and Citronella oil nano emulsions. The average size of droplets of neem nano emulsion (NNE) with different percentage of Citronella oil ranged from 11.23 ± 3.86 nm to 17.80 ± 4.52 nm while that of Citronella nano emulsion (CNE) with different percentage of neem oil ranged from 8.12 ± 2.80 nm to 12.04 ± 3.74 nm. It was found that increase in surfactant ratio to neem oil or Citronella oil decreases the size of droplets in nano emulsions. Further, in vitro antifungal study of against Rhizoctonia solani and Sclerotium rolfsii was carried out by poisoned food technique. Results showed that neem nano emulsion 10 (NNE10) and Citronella nano emulsion 10 (CNE10) were most active against R. solani (ED 50 13.67 mg L −1 and 25.64 mg L −1 ) and S. rolfsii (ED 50 14.71 mg L −1 and 20.88 mg L −1 ). The standardization of the composition and development of Citronella essential oil and neem oil based nano emulsions and their antifungal activity against these two fungi has been reported for the first time.