Microcápsulas De Alginato De Cálcio E Óleo Vegetal Pela Técnica De Gelificação Iônica: Um Estudo Da Capacidade De Encapsulamento E Aplicação Dermatológica

Pasqualim, P.; Culpi, T. A.; Kaminski, G. T. A.; Fin, M. T.; Sasso, D. G. B.; Costa, Camila Klocker; Miguel, Marilis D.; Fujiwara, Gislene Mari; Rodrigues, B. H. N.; Zanin, Sandra Maria Warumby

doi:10.5380/acd.v11i1.21350

Cited by 6 publications

(5 citation statements)

References 2 publications

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“…No studies were found in the literature using alginate as a polymer matrix for encapsulation for the EOs under study. On the other hand, alginate is used in encapsulation of EOs and vegetable oils and has the encapsulation observed in this study confirmed by Pasqualim et al (2020) and Paula et al (2010). Encapsulation is a multifunctional technology capable of ensuring greater stability to EO and thus possible more versatility in its application.…”

Section: Encapsulation Yieldsupporting

confidence: 63%

Larvicidal activity of microparticles of Melissa officinalis L. essential oil (Lamiaceae) against Aedes aegypti (Diptera, Culicidae)

Martins

Rosa

Arruda

et al. 2021

RSD

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This study aimed to evaluate the larvicidal activity of essential oil microparticles (EO) of Melissa officinalis L. against Aedes aegypti. The leaves of M. officinalis were collected in the municipality of São José de Ribamar, Maranhão, Brazil, later dried, crushed and ground. 90g of the dried leaves were used to obtain the EO by the hydrodistillation method. For the synthesis of microencapsulated EO, 60g of sodium alginate (2.5% m/v) was added to the mixture of 15g of Tween 20 with 6g of EO. The mixture was homogenized and drips over CaCl2 5% m/v solution for the hardening of particles via crosslinking. The microparticles were washed with distilled water in filter and dried at 35ºC/24h and 15 days at tamb (30ºC). The eggs of Aedes aegypti were collected at the Federal University of Maranhão by the ovitrampas method. The larvae that hatched were fed until they reached the fourth instar. Groups of larvae (n=20) were submitted to solutions of EO and microparticles of 10-90 mg/L . After 24 h, live and dead larvae were counted and LC50 was calculated by the Reed&Muench method, using Cheng's criterion for classification of active potential. All larvae presented mortality in all concentrations tested. The LC50 obtained for the EO was 40.60 mg/L and for the microparticles 22.10 mg/L, both classified as active according to the adopted criterion, but it is observed that the microparticles increased the larvicidal potential of the EO. Through the results obtained, it is concluded that the microparticles formulated with the EO proved to be efficient in the face of the larvae of Aedes aegypti, being interesting and important in controlling and combating the mosquito that transmits dengue.

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Section: Encapsulation Yieldsupporting

confidence: 63%

Larvicidal activity of microparticles of Melissa officinalis L. essential oil (Lamiaceae) against Aedes aegypti (Diptera, Culicidae)

Martins

Rosa

Arruda

et al. 2021

RSD

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“…The test followed the same methodology described in the previous section. Capsules loaded with conidia were prepared according to Pasqualim et al (2010) Under agitation, the sodium alginate solution and the fungus were slowly added to the CaCl 2 , forming the capsules. The phase transfer was performed with a peristaltic pump (Watson-Marlow Inc., TPM 600 55RPM) at a flow of 35 drops min.…”

Section: Fungimentioning

confidence: 99%

Compatibility of polymers to fungi Beauveria bassiana and Metarhizium anisopliae and their formulated products stability

et al. 2017

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ABSTRACT. Stability during storage is a limiting factor in the development and use of bioinsecticides. This study aims to evaluate the compatibility of the entomopathogenic fungi Metarhizium anisopliae and Beauveria bassiana with components used in encapsulated formulations and to evaluate shelf-life in formulations with B. bassiana. Sodium alginate and maltodextrin, hemicellulose, and dimethyl sulfoxide solvents were evaluated. Compatibility was evaluated by mixing the components with PDA, and the parameters evaluated were vegetative growth, sporulation and viability. The formulations of fungi were prepared in various concentrations of sodium alginate and then added drop-wise to calcium chloride. To evaluate the stability, formulations were stored at 26.5, 4.0, and -20.0°C. Monthly, samples were taken, and the capsules were placed on Petri dishes with PDA to verify the growth after seven days of incubation. These evaluations were performed by the 12 th month. Biopolymers evaluated were compatible with both fungi, exception maltodextrin at 1.5%, which was classified as moderately toxic to B. bassiana. Dimethyl sulfoxide was classified as moderately toxic to B. bassiana at 3.0% and to M. anisopliae at 2.0% and 3.0%. The formulations were stable throughout the 12 months in the conditions evaluated, while for the pure conidia of the fungus, 46% viability in the 6th month at 26.5°C was observed.Keywords: microbial control, formulations, entomopathogens, encapsulation, shelf-life, microbiology.Compatibilidade de polímeros aos fungos Beauveria bassiana e Metarhizium anisopliae e a estabilidade dos seus produtos formulados RESUMO. A estabilidade no armazenamento é um fator limitante ao desenvolvimento e uso de bioinseticidas. Este estudo objetivou avaliar a compatibilidade dos fungos entomopatogênicos M. anisopliae e B. bassiana com componentes utilizados em formulações encapsuladas e avaliar a estabilidade de formulações contendo B. bassiana bassiana. Alginato de sódio, maltodextrina, hemicelulose e o solvente dimetilsulfóxido foram avaliados. A compatibilidade foi avaliada misturando os componentes ao BDA e os parâmetros para avaliação foram crescimento vegetativo, esporulação e viabilidade. As formulações fúngicas foram preparadas em concentrações de alginato de sódio gotejadas em cloreto de cálcio. Para avaliar a estabilidade, as formulações foram armazenadas em 26,5; 4,0 e -20,0°C. Mensalmente, amostras foram sendo retiradas e as cápsulas colocadas em placas de Petri com BDA para verificar o crescimento após 7 dias de incubação. Essas avaliações ocorreram durante 12 meses. Os biopolímeros avaliados foram compatíveis a ambos os fungos, com exceção de maltodextrina a 1,5%, classificado como moderadamente tóxico para B. bassiana. O dimetilsulfóxido foi classificado como moderadamente tóxico para B. bassiana a 3,0%; e para M. anisopliae a 2,0 e 3,0%. As formulações permaneceram estáveis durante os 12 meses nas condições avaliadas, enquanto para o conídio puro, ao sexto mês já apresentava 46% de viabilidade a 26,5°C.Pa...

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“…Os valores de compostos fenólicos totais descritos na literatura para o óleo essencial de cravo-da-índia são variados: 898,9 mg EAG g -1 (Viuda-Martos et al, 2010), 845 mg EAG g -1 (Barakat, 2014), 185,9 mg EAG g -1 (Babaoglu et al, 2017) e 9,07 mg EAG g -1 (Radünz et al, 2018). Essas variações são esperadas, pois a composição química do óleo essencial depende da parte da planta utilizada para extração, do método utilizado e das características gerais da amostra (Oliveira et.…”

Section: Determinação Do Conteúdo Fenólico Totalunclassified

“…Autoria própria (2024).Em um estudo realizado porPasqualim et al (2010), percebeu-se que a utilização de 0,5% (p/v) de alginato e 0,5% (p/v) de cloreto de cálcio para encapsular óleo de semente de uva, resultou em encapsulados de aparência pouco homogênea, com baixa resistência mecânica e que estouraram rapidamente quando pressionadas pelas mãos. Ao gotejar a emulsão de alginato e óleo de semente de uva na solução de cloreto de cálcio, as partículas já se mostraram deformadas.…”

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Development of Syzygium aromaticum (L.) essential oil encapsulates by ionic gelification and evaluation of antioxidant activity

Mergulhão,

Bulhões,

Silva

et al. 2024

CLIUM

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The objective of this work was to develop a product capable of protecting Syzygium aromaticum (clove) essential oil against high volatility. Clove oil (CEO) was encapsulated in alginate by ionic gelation with subsequent freeze-drying. Characterization was carried out by GC/MS, TGA/DSC and antioxidant (DPPH), and total phenol (Folin-Ciocalteau) analysis. Eugenol was the majority (81.5%) and the encapsulation efficiency varied between 14.0%+0.96 (F1: 1.0% alginate) and 9.8%+0.35 (F2: 2.0% alginate) in wet encapsulates, and 23.5%+0.14 (LF1: 1.0% alginate) and 16.9%+0.16 (LF2: 2.0% alginate) in freeze-dried encapsulates. The total phenol content reached 714.8+0.97 EAG g-1 in LF1, with strong inhibition of the DPPH radical (71.4%). Freeze-drying provided a higher percentage of active ingredients per gram of encapsulated and it was possible to identify high thermal stability in LF1 (mass loss: 81.8%; 258.9 °C) compared to wet encapsulates (mass loss: 86.5%; 65.8°C). The use of the lowest concentration of alginate seems to have been favorable. In this way, the accessible technology used allows preserving the content and properties of the CEO, offering a basis for new encapsulated research.

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Microcápsulas De Alginato De Cálcio E Óleo Vegetal Pela Técnica De Gelificação Iônica: Um Estudo Da Capacidade De Encapsulamento E Aplicação Dermatológica

Cited by 6 publications

References 2 publications

Larvicidal activity of microparticles of Melissa officinalis L. essential oil (Lamiaceae) against Aedes aegypti (Diptera, Culicidae)

Larvicidal activity of microparticles of Melissa officinalis L. essential oil (Lamiaceae) against Aedes aegypti (Diptera, Culicidae)

<b>Compatibility of polymers to fungi <i>Beauveria bassiana</i> and </i>Metarhizium anisopliae</i> and their formulated products stability

Development of Syzygium aromaticum (L.) essential oil encapsulates by ionic gelification and evaluation of antioxidant activity

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