OIL-IN-WATER (O/W) EMULSIONABLE CONCENTRATE OF ISHPINK (Ocotea quixos) WITH THERMODYNAMIC STABILITY

Aguilar, Marina Chanena Alvarado; Coronel, Paula Catalina Recalde; Leal-Alvarado, D.A.; Sánchez, Fabiola Elena Villa; Alcivar, Richard Tamayo

doi:10.1590/1983-21252019v32n303rc

Cited by 3 publications

(2 citation statements)

References 26 publications

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“…Pseudo‐ternary phase diagrams were constructed to describe four‐component systems (oil phase (containing different percentages of active ingredient of the tested insecticides), surfactant, co‐surfactant and water) in microemulsion preparation (Feng et al 2010; Schmid‐Fetzer 2014; Wu et al 2014; Aguila et al 2019). These diagrams were created using the water titration method at 25 ± 1°C with some modifications.…”

Section: Methodsmentioning

confidence: 99%

Fabrication and characterization of microemulsion of some insecticides and evaluating their efficacy against cotton leaf worm on cotton crop under laboratory and field conditions

Derbalah,

Morsy,

El‐Zahi

et al. 2024

Entomological Research

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Traditional pesticide formulations have some shortcomings, including limited efficacy and the usage of huge amounts of insecticide, which has a negative impact on the environment. Using nano‐pesticide formulations reduces the amount of pesticide applied, minimizing pest control expenses and environmental contamination. As a result, this study was conducted to develop a microemulsion formulation containing emamectin benzoate or beta‐cyfluthrin with improved morphology, droplet size, emulsion stability, and persistence of foam. Moreover to assess the efficacy of the developed microemulsion in comparison to the convention alone against the Egyptian cotton leaf worm, Spodoptera littoralis (Boisd.) under both laboratory and field conditions. The results showed that the optimum conditions for emamectin benzoate microemulsion was 2% active ingredient, 5% (w/w) ethyl acetate, and DMF (3:2), 3.5% (w/w) Geronol ff4 and Etocas 35 (6:1), 5% (w/w) ethanol, and 86.5% (w/w) water, while for beta‐cyfluthrin, a 5.0% active ingredient, 15% (w/w) Solvesso 100 and ethyl acetate (2:1), 7.0% (w/w) Geronol ff4 and Etocas 35 (6:1), 10% (w/w) ethanol, and 68% (w/w) water. Under laboratory conditions, emamectin benzoate was more toxic than beta‐cyfluthrin to Spodoptera littoralis second and fourth instar larvae. Emamectin benzoate was more effective that beta‐cyfluthrin against Spodoptera littoralis in the field, whether as a microemulsion or a commercial product. Thus, microemulsions of tested insecticides with better formulation qualities may be more effective than traditional ones in controlling cotton leaf worm.

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Section: Methodsmentioning

confidence: 99%

Fabrication and characterization of microemulsion of some insecticides and evaluating their efficacy against cotton leaf worm on cotton crop under laboratory and field conditions

Derbalah,

Morsy,

El‐Zahi

et al. 2024

Entomological Research

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“…In contrast, magnesium usually occurs at lower concentrations compared to calcium in groundwater (about 50 mg. L -1 and rarely about 100 mg. L -1 ), and calcium-based hardness usually predominates [48]. Considering its importance, the water of different hardness was used, called waters CIPAC A and D [49]. The data presented in Table 1 showed the emulsion stability and re-emulsification of the prepared cinnamaldehyde-in-water emulsion after storage at 54°C for 14 days when diluted with the different hardness of water (CIPAC A and D) presented appropriated bloom, formed milky bluish emulsion, and did not show creamy layer until 24 h. Such signs are a preliminary indication of physical stability.…”

Section: Emulsion Stabilitymentioning

confidence: 99%

Eco-Friendly Cinnamaldehyde Based Emulsion for Phytopathogenic Bacterial Growth Inhibitor

Mohammed

El-Rahman

2020

JAMB

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The formulation plays an essential role in achieving the successful delivery and biological activity of any plant protection products. This study aimed to develop a cinnamaldehyde water-based formulation (oil-in-water emulsion) via a high-shear stirring emulsification method. Cinnamaldehyde emulsion was successfully prepared and characterized using different physicochemical parameters (emulsion stability, persistent foaming, accelerated storage at 54°C for 2 weeks, and stability at 0°Cfor one week, as well as pH, surface tension, flash point, viscosity, and particle size distribution). Also, the antibacterial activity was verified in vitro against some important phytopathogenic bacteria; Erwinia amylovora, Pectobacterium aroidearum, Pseudomonas aeruginosa, and Ralstonia solanacearum using well diffusion method. In addition, the minimum inhibition concentration (MIC) was determined by the twofold dilution method. The results revealed that the prepared formulation showed good storage stability, exhibited non-Newtonian shear-thinning behavior and promising antibacterial activity. The inhibition zones against the tested phytopathogenic bacteria were ranged from 10.3 mm to 52.0 mm. MICs of the prepared formulation were 15.63, 31.25, 62.5, and 15.63 μl/ml against Erwinia amylovora, Pectobacterium aroidearum, Pseudomonas aeruginosa and Ralstonia solanacearum, respectively. Our results provide an environmentally friendly formulation with promising activity to control the agricultural crop disease.

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Discussions on the Properties of Emulsion Prepared by Using an Amphoteric Chitosan as an Emulsifier

Chung

Chen

2022

Applied Sciences

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A typical emulsion contains oil and water phases, and these two phases can be combined by an emulsifier with both lipophilic and hydrophilic groups to form a mixture. If the component of water is more than oil, the mixture is termed as o/w emulsion. The water is called the continuous phase and the oil is called the dispersed phase. Oppositely, if the component of oil is more than water, the mixture is termed as w/o emulsion. The oil is called the continuous phase and the water is called the dispersed phase. Chitosan, which is biocompatible and non-toxic, was modified as an amphoteric emulsifier to replace sodium acrylates copolymer in the preparation of emulsions. Both sodium acrylates copolymer and the modified chitosan were used as emulsifiers, respectively, and the properties of moisturizing, transmittance, the number of bacteria, and emulsion stability were measured. The experimental results showed that the amount of amphoteric chitosan is less than that of sodium acrylate copolymer by 20% under a similar degree of emulsification. The measurement of spatial moisture showed the difference in equilibrium humidity was in the range of 2.05 to 2.20 gH2O/kg dry air, indicating that the moisture retention of the modified chitosan is better. In addition, the calculation of bacterial growth confirmed that the number of bacteria in the amphoteric chitosan emulsion and the sodium acrylate copolymer emulsion were 80 and 560, respectively. The emulsion stability was tested by the separation of oil and water phases in the diluted emulsion and by centrifugal accelerated sedimentation. The results showed that, for both emulsifiers, no separation of the oil and water phases occurred within one hour, and the stability of the modified chitosan emulsion was better. Therefore, the modified chitosan successfully substitutes sodium acrylates copolymer as an emulsifier in the preparation of emulsion.

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OIL-IN-WATER (O/W) EMULSIONABLE CONCENTRATE OF ISHPINK (Ocotea quixos) WITH THERMODYNAMIC STABILITY

Cited by 3 publications

References 26 publications

Fabrication and characterization of microemulsion of some insecticides and evaluating their efficacy against cotton leaf worm on cotton crop under laboratory and field conditions

Fabrication and characterization of microemulsion of some insecticides and evaluating their efficacy against cotton leaf worm on cotton crop under laboratory and field conditions

Eco-Friendly Cinnamaldehyde Based Emulsion for Phytopathogenic Bacterial Growth Inhibitor

Discussions on the Properties of Emulsion Prepared by Using an Amphoteric Chitosan as an Emulsifier

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