scholarly journals Síntesis verde de nanopartículas de ZnO con actividad antibacteriana para funcionalizar textiles de algodón

2021 ◽  
Vol 85 (2) ◽  
Author(s):  
Laura Muñoz-Echeverri ◽  
Daniel Campo-Avendaño ◽  
Manuela Hoyos-García ◽  
Maica Obregón- Velázquez ◽  
Juan Muñoz-Vergara ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Azadirachta Indica ◽  
Aloe Vera

En la presente investigación se evaluó la síntesis verde de nanopartículas de óxido de zinc (ZnO) y su aplicación como agente antibacteriano para sustratos textiles. El proceso de síntesis implicó el uso de extractos de Azadirachta indica, Aloe vera, y acetato de zinc como precursor metálico. La síntesis de nanopartículas se confirmó mediante espectrofotometría UV-Vis, espectroscopia de infrarrojo con transformada de Fourier (FTIR), difracción de rayos X (DRX) y microscopía electrónica de barrido. La eficiencia de las nanopartículas como agentes antibacterianos en textiles se probó en uno de 100 % algodón funcionalizado por impregnación. Este fue sometido a cinco y diez ciclos de lavado doméstico para analizar la durabilidad de las nanopartículas. La actividad antibacteriana del textil funcionalizado, con y sin ciclos de lavado, se determinó mediante la norma ISO 20743:2007 contra la bacteria Staphylococcus aureus ATCC 6538. Se encontró que las nanopartículas confieren una actividad antibacteriana fuerte al textil y, aunque hay una pérdida importante del nanomaterial con los ciclos de lavado, la concentración remanente es suficiente para mantener una actividad antibacteriana significativa hasta los diez ciclos de lavado. Se concluye que las nanopartículas de ZnO son candidatas promisorias para ser empleadas como agentes antibacterianos en la industria textil, pues presentan actividad antibacteriana y son relativamente fáciles de obtener por síntesis verde con extractos de A. indica y A. vera, material vegetal de fácil acceso en el departamento de Antioquia.  

scholarly journals Effectiveness of Ethanolic Extract of Aloe Vera Leaves against Staphylococcus aureus

2020 ◽  
Vol 3 (2) ◽  
pp. 36-40
Author(s):  
Viki Ayu Intan Permatasari ◽  
Mutia Hariani Nurjanah ◽  
Wimbuh Tri Widodo
Keyword(s):  
Staphylococcus Aureus ◽  
Aloe Vera ◽  
Ethanolic Extract ◽  
Ethanol Extract ◽  
Average Diameter ◽  
Positive Control ◽  
Negative Control ◽  
Traditional Medicines ◽  
Alternative Ingredients ◽  
High Concentrations

Since long ago Indonesia used nutritious plants as traditional medicines. Various types of plants in Indonesia can be used as alternative ingredients, one of which is aloe vera. Aloe vera contains saponin and anthraquinone, so aloe vera leaves function as antiseptic and antibacteria. Staphylococcus aureus is a gram-positive coccus bacteria. This bacterium is often found as a normal germ flora in humans. Staphylococcus aureus can cause infections in humans and animals. This study aims to determine the effect of ethanolic extract of Aloe vera leaves in inhibiting Staphylococcus aureus by using maceration extract method. The concentrations used were 20%, 40%, 60%, 80% and 100% with positive control (Erytromycin) and negative control (aquades). The inhibitory zone analysis is done using the table method. Test of ethanol extract of Aloe vera leaves in inhibiting Staphylococcus aureus produced inhibition zones at concentrations of 60%, 80% and 100% with average diameter of 6.94 mm, 6.22 mm and 9.5 mm. The conclusion of this research is the ethanolic extract of Aloe vera leaves can inhibit Staphylococcus aureus in high concentrations

scholarly journals Antibacterial effect of Dimethyl sulfoxide extract of Aloe vera (Aloe barbadensis) leaf gel against Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli and Klebsiella pneumoniae

Mediscope ◽  
2020 ◽  
Vol 7 (2) ◽  
pp. 67-74 ◽  
Author(s):  
Syed Didarul Haque ◽  
Abu Md Mayeenuddin Al Amin ◽  
Baishakhi Islam ◽  
Nazia Nazneen ◽  
Syeda Noorjahan Karim ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Klebsiella Pneumoniae ◽  
Dimethyl Sulfoxide ◽  
Antibacterial Effect ◽  
Aloe Vera ◽  
Biologically Active ◽  
Diffusion Method ◽  
E Coli

An exploratory study based on laboratory experiment was carried out to determine the antibacterial effect of Dimethyl sulfoxide (DMSO) extract of Aloe vera leaf gel (DAE) against standard strains of Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli and Klebsiella pneumoniae in the Department of Pharmacology & Therapeutics in collaboration with the Department of Microbiology, Mymensingh Medical College, Mymensingh, Bangladesh. DMSO extract was used in five different concentrations (100, 200, 300, 400 and 500 μg/ml). Dose dependent inhibitory effect was seen against the test organisms using disc diffusion method. Zone of inhibition (ZOI) were 8 mm, 13 mm, 15 mm, 16 mm and 21 mm against S. aureus; 0 mm, 8 mm, 13 mm, 15 mm and 18 mm against P. aeruginosa; 8 mm, 11 mm, 13 mm, 16 mm and 20 mm against E. coli; 0 mm, 9 mm, 12 mm, 14 mm and 18 mm against K. pneumoniae at 100, 200, 300, 400 and 500 μg/ml respectively. The minimum inhibitory concentration (MIC) was assessed by broth dilution technique. The MICs of DAE for S. aureus, P. aeruginosa, E. coli and K. pneumoniae were 300 μg/ml, 400 μg/ml, 400 μg/ml and 450 μg/ml respectively. From the study it was observed that DMSO extract of Aloe vera leaf gel possesses antibacterial effect against the test pathogens. The findings highlight the need for further extensive study to detect and isolate the biologically active ingredients present in the Aloe vera leaves which are responsible for antibacterial effect. Hopefully, that would lead to the discovery of new and more potent antimicrobial agents originated from Aloe vera. Mediscope Vol. 7, No. 2: July 2020, Page 67-74

scholarly journals Effect of neem ( Azadirachta indica A. Juss) leaf extract on resistant Staphylococcus aureus biofilm formation and Schistosoma mansoni worms

2015 ◽  
Vol 175 ◽  
pp. 287-294 ◽  
Author(s):  
Patrick V. Quelemes ◽  
Márcia L.G. Perfeito ◽  
Maria A. Guimarães ◽  
Raimunda C. dos Santos ◽  
David F. Lima ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Schistosoma Mansoni ◽  
Azadirachta Indica ◽  
Biofilm Formation ◽  
Leaf Extract

scholarly journals Actividad antibacteriana y fungicida de las antraquinonas de Aloe vera L. combinadas con cationes Cobre, Hierro, Plata y Bismuto

2012 ◽  
Vol 15 (1) ◽  
pp. 30-35
Author(s):  
Félix E. Saavedra ◽  
Benedicta C. López ◽  
Victoria J. Yrei ◽  
Gallardo C. Gallardo ◽  
Gloria C. Gordillo ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Aspergillus Niger ◽  
Aloe Vera

El presente estudio tuvo por finalidad evaluar la actividad antibacteriana y fungicida de los macerados acuosos y alcohólicos de las hojas de Aloe vera L., que contenían derivados antraquinónicos. Con dichos macerados se prepararon soluciones de CuSO4.5H2O 1,5%, FeCl3 1%, AgNO3 1%, y Bi(NO3)3 1,5%, que se guardaron en frascos de vidrio color ámbar, herméticamente cerrados por 12 meses, bajo refrigeración; un grupo similar se conservó a 25°C. Se determinó la actividad de estos preparados, usando el método excavación placa de la USP XXX frente a cepas de Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa y Aspergillus niger. Las soluciones acuosas de Aloe vera L. presentaron actividad antibacteriana en orden decreciente Cu > Ag > Fe, y las soluciones alcohólicas Ag > Cu > Fe. Solamente las soluciones acuosas de sulfato de cobre presentaron actividad fungicida. Los preparados conservados bajo refrigeración, presentaron mayor actividad antimicrobiana y fungicida que los preparados equivalentes conservados a 25°C.

scholarly journals Antimicrobial Activity of Azadirachta indica, against Target Pathogens and Its Utility as a Disinfectant and Floor Cleaner

2021 ◽  
Vol 10 (25) ◽  
pp. 1899-1903
Author(s):  
Mohsin Ali Khan ◽  
Shadma Yaqoob ◽  
Sharique Ahmad
Keyword(s):  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Azadirachta Indica ◽  
Leaf Extract ◽  
Diffusion Method ◽  
Leaf Extracts ◽  
Neem Extract ◽  
Inoculum Preparation ◽  
Neem Leaf Extract ◽  
Agar Well Diffusion Method

BACKGROUND Azadirachta indica, commonly known as neem, neem tree or Indian lilac, Limbo, Nim, Nimba, Medusa and Vempu. It is typically grown in tropical and subtropical regions. Neem belongs to family meliaceae. Neem is a native tree of India. It is also called “village pharmacy of south Asia” (India) because of its enormous medicinal properties and people use it most of the time without knowing its multiple advantages. This study was done to know the efficacy of medicinal plant named Azadirachta indica (Neem) against pathogenic microorganisms and about its utility as disinfectant and floor cleaner. METHODS Agar well diffusion method, Culture plate method, inoculum preparation & its subculture methods were used to determine the antimicrobial activity of the neem leaf extract. Different concentrations of neem leaf extracts in culture plates were used for the study. In this method inhibited zones were measured. RESULTS Neem leaf extracts showed considerable antimicrobial activity against four target pathogens. In agar well diffusion method it showed maximum antimicrobial activity against Enterococcus and Staphylococcus aureus. Growth of inhibition was increased as the concentration of the neem extract in agar media increased and was maximum for Staphylococcus aureus. CONCLUSIONS The extract of A. indica, has antimicrobial activity against target pathogens Enterococcus, Staphylococcus aureus, Pseudomonas, and E.coli. With the old medicinal knowledge on neem, better economic and therapeutic utilization can be done by using modern approaches of drug development. KEY WORDS Neem Leaf extract, Antimicrobial Activity, Agar Well Diffusion Test, Zone of Inhibition

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