scholarly journals Finishing of cotton fabric with Psidium guajava herbal extract and testing its antimicrobial activity

2020 ◽  
Vol 8 (3) ◽  
pp. 49-53
Author(s):  
Dr. Sudha Babel ◽  
Latika Sachihar
Keyword(s):  
Antimicrobial Activity ◽  
Cotton Fabric ◽  
Psidium Guajava ◽  
Herbal Extract

scholarly journals Psidium Guajava Leave Extract as Reducing Agent for Synthesis of Zinc Oxide Nanoparticles and its Application to Impart Multifunctional Properties for Cellulosic Fabrics

2021 ◽  
Vol 11 (5) ◽  
pp. 13535-13556
Keyword(s):  
Antimicrobial Activity ◽  
Cotton Fabric ◽  
Zno Nanoparticles ◽  
Water Extract ◽  
Ethanol Extract ◽  
Processing Parameters ◽  
Psidium Guajava ◽  
X Ray Diffraction ◽  
X Ray ◽  
Particle Size Analyzer

Nowadays, cotton fabric treatment with nanoparticles has been increasingly high because of its unique properties. In this study, using the bioactive compounds in Psidium guava leave extracts, zinc precursors were reduced to obtain ZnO nanoparticles using two extracts, namely, water extract and ethanol extract. A comparative evaluation was carried out to analyze and develop a wider understanding of the effect of processing parameters on the ZnO nanoparticles. The ZnO nanoparticles have been characterized using a particle size analyzer, Transmission Electronic Microscopy (TEM), X-ray diffraction, and Thermal Gravimetrical Analysis (TGA) to determine their structure. The cotton fabric was treated with ZnO nanoparticles in the presence and absence of different natural biopolymers, namely; alginate, chitosan, and carboxymethyl cellulose (CMC). The treated cotton samples were characterized by atomic absorption and scanning electron microscopy (SEM), UPF value, antimicrobial activity, and self-cleaning properties. It was found that the cotton fabric treated with ZnO-chitosan nanocomposites gives the higher UPF values and antimicrobial activity against Staphylococcus aureus, Escherichia coli, and Candida albicans of all other treated fabrics.

scholarly journals Chemical Composition, Antimicrobial activity, In Vitro Cytotoxicity and Leukotoxin Neutralization of Essential Oil from Origanum vulgare against Aggregatibacter actinomycetemcomitans

Pathogens ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 192 ◽  
Author(s):  
Sanae Akkaoui ◽  
Anders Johansson ◽  
Maâmar Yagoubi ◽  
Dorte Haubek ◽  
Adnane El hamidi ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
Essential Oil ◽  
Periodontal Diseases ◽  
Aggregatibacter Actinomycetemcomitans ◽  
Psidium Guajava ◽  
Minimal Bactericidal Concentration ◽  
Origanum Vulgare ◽  
Neutralizing Capacity ◽  
Broth Microdilution Method

In this study, the essential oil of Origanum vulgare was evaluated for putative antibacterial activity against six clinical strains and five reference strains of Aggregatibacter actinomycetemcomitans, in comparison with some antimicrobials. The chemical composition of the essential oil was analyzed, using chromatography (CG) and gas chromatography–mass spectrometry coupled (CG–MS). The major compounds in the oil were Carvacrol (32.36%), α-terpineol (16.70%), p-cymene (16.24%), and Thymol (12.05%). The antimicrobial activity was determined by an agar well diffusion test. A broth microdilution method was used to study the minimal inhibitory concentration (MIC). The minimal bactericidal concentration (MBC) was also determined. The cytotoxicity of the essential oil (IC50) was <125 µg/mL for THP-1 cells, which was high in comparison with different MIC values for the A. actinomycetemcomitans strains. O. vulgare essential oil did not interfere with the neutralizing capacity of Psidium guajava against the A. actinomycetemcomitans leukotoxin. In addition, it was shown that the O. vulgare EO had an antibacterial effect against A. actinomycetemcomitans on a similar level as some tested antimicrobials. In view of these findings, we suggest that O.vulgare EO may be used as an adjuvant for prevention and treatment of periodontal diseases associated to A. actinomycetemcomitans. In addition, it can be used together with the previously tested leukotoxin neutralizing Psidium guajava.

Properties and Antimicrobial Activity of Nanosilver Deposited Cotton Fabric Coated with γ-Methacryloxypropyl Trimethoxysilane

2012 ◽  
Vol 20 ◽  
pp. 77-88 ◽  
Author(s):  
Stanislav Kurajica ◽  
T. Očko ◽  
Vilko Mandić ◽  
V. Cigula Kurajica ◽  
I. Lozić
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Cotton Fabric ◽  
Inductively Coupled Plasma ◽  
Thermo Gravimetric Analysis ◽  
Nanostructured Material ◽  
Gravimetric Analysis ◽  
Bacterial Reduction ◽  
Fabric Surface ◽  
Methacryloxypropyl Trimethoxysilane

The simple and industrially adjustable process of silver nanoparticles deposition on cotton fabric followed by coating with γ-methacryloxypropyl trimethoxysilane (MPS), as well as the properties of obtained nanocomposite has been investigated. Silver nanoparticles were prepared through the reduction of silver nitrate with sodium borohydrate and deposited on cellulose fabric. In order to stabilize obtained nanostructured material and improve its properties, the fabric was treated by immersion in cross linkable MPS. The morphology of the finished fabrics was characterized by Scanning Electron Microscopy (SEM). It has been determined that process does not impair nanocharacter of silver particles and yield uniform distribution throughout the fabric surface. The concentration of Ag in the fabric samples was determined by Inductively Coupled Plasma Mass Spectroscopy (ICP-MS). The average deposited amount of nanoparticles was found to be 63 ppm and 48 ppm for samples without and those with MPS, respectively. The character of obtained polysiloxane coating was examined using Fourier Transform Infrared (FTIR) spectroscopy. The presence of SiOSi bonds on the cellulose surface pointed out to self-condensation between silanol groups. Differential Thermal and Thermo-Gravimetric Analysis (DTA/TGA) revealed that MPS deposited on fabric provided modification of thermal properties. The change of the surface properties after the modification was ascertained by contact angle measurements. The antimicrobial activity of the antibacterial finish on the cotton fabric, expressed as bacterial reduction efficiency, has been determined. Bacterial reduction of at least 88.5% against both, Staphylococcus aureus and Escherichia coli, has been obtained.

Antimicrobial activity and cytotoxicity of cotton fabric coated with conducting polymers, polyaniline or polypyrrole, and with deposited silver nanoparticles

2017 ◽  
Vol 396 ◽  
pp. 169-176 ◽  
Author(s):  
Nela Maráková ◽  
Petr Humpolíček ◽  
Věra Kašpárková ◽  
Zdenka Capáková ◽  
Lenka Martinková ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Conducting Polymers ◽  
Cotton Fabric

Antimicrobial activity of AgCl embedded in a silica matrix on cotton fabric

2009 ◽  
Vol 75 (4) ◽  
pp. 618-626 ◽  
Author(s):  
Brigita Tomšič ◽  
Barbara Simončič ◽  
Boris Orel ◽  
Metka Žerjav ◽  
Hans Schroers ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Cotton Fabric ◽  
Silica Matrix

scholarly journals Antimicrobial activity of Guava tree (Psidium Guajava) leaf extract and selected Commercial Antibiotics on Bacterial isolates from Kisubi Hospital

2020 ◽  
Author(s):  
◽  
David Serunjogi ◽  
Kizito Muwonge
Keyword(s):  
Antimicrobial Activity ◽  
Psidium Guajava ◽  
Diffusion Method ◽  
Resistant Bacteria ◽  
Drug Resistant ◽  
Leaf Extracts ◽  
Drug Resistant Bacteria ◽  
The World ◽  
Guava Leaf ◽  
Tree Leaf

Background: Plant species such as the guava have been used in Uganda and elsewhere in the world to treat some of the medical conditions associated with bacteria, this is due to the increased number of drug resistant bacteria in the world. In this study, the antimicrobial activity of guava leaf extracts against some of the disease causing bacteria isolated from Kisubi hospital in Uganda is discussed. Methods: The guava leafs were collected from a plantation near Zika forest in Uganda (0°7′27″N 32°31′32″E / 0.12417°N 32.52556°E / 0.12417; 32.52556) and samples were put in a bag and transferred to the university laboratory where they were identified. The extracts were obtained by maceration using distilled water, 30%, 50% and 70 % methanol as the extraction solvents. Antimicrobial susceptibility testing was conducted using the disc diffusion method. Results: Gram-negative Escherichia coli was sensitive to the plant extract and synthetic commercial drugs such as trimethoprim-sulfamethozole, ciprofloxacin, and Gentamicin. Pseudomonas aeruginosa was resistant to all drugs. Streptococcus pneumonia and Staphylococcus aureus were all sensitive to the plant extracts with measurable inhibition zones. Conclusion: The Guava tree leaf crude extracts have antimicrobial activity against drug-resistant bacteria. More studies should be carried out to know the potency and the concentration of different plant origin extracts.

scholarly journals AKTIVITAS ANTIMIKROBA EKSTRAK DAUN JAMBU BIJI DARI BEBERAPA KULTIVAR TERHADAP Staphylococcus aureus ATCC 25923 DENGAN HOLE-PLATE DIFFUSION METHOD

2003 ◽  
Vol 9 (1) ◽  
pp. 49-51
Author(s):  
Farida Lanawati Darsono ◽  
Stephanie Devi Artemisia
Keyword(s):  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Traditional Medicine ◽  
Tween 80 ◽  
Antibacterial Activities ◽  
Psidium Guajava ◽  
Antimicrobial Activities ◽  
Diffusion Method ◽  
Gram Positive Bacteria ◽  
Activity Test

A study has been performed on the antimicrobial activities of jambu biji (Psidium guajava Linn) leaves from several cultivars (red, white and yellow cultivar) against Staphylococcus aureus ATCC 25923 representing the Gram positive bacteria. The reason for conducting this research is that the leaves of jambu biji are frequently used in traditional medicine as a remedy against diarrhoea. The hole-plate diffusion method was used for conducting the antimicrobial activity test with antibiotics (Ampicilline trihidrat) as reference standards. The extracts of jambu biji for each cultivar were obtained by reflux with ethanol 96 percent. The concentrations of the extracts applied to the holes were 10 percent, 20 percent, and 30 percent w/v, the extracts were reconstituted with tween 80 and ethanol 96 percent. Based on the result of the study, it can be concluded that the extract of jambu biji from each cultivar with the concentration of 10 percent, 20 percent, and 30 percent w/v showed antibacterial activities against Staphylococcus aureus ATCC 25923. The result obtained statictically evaluated using Anava Factorial 3x3 and furthery tested for significancy (a = 0.05). Based on the results of study, it can be concluded that the extract of jambu biji leaves from red cultivar, white cultivar and yellow cultivar showed antibacterial activities against Staphylococcus aureus ATCC 25923.

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