scholarly journals Study on the Grafting of Chitosan-Essential Oil Microcapsules onto Cellulosic Fibers to Obtain Bio Functional Material

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 637
Author(s):  
Aicha Bouaziz ◽  
Dorra Dridi ◽  
Sondes Gargoubi ◽  
Abir Zouari ◽  
Hatem Majdoub ◽  
...  
Keyword(s):  
Essential Oil ◽  
Attenuated Total Reflectance ◽  
Functional Material ◽  
Bacteria Growth ◽  
E Coli ◽  
Cellulosic Fibers ◽  
Promising Tool ◽  
Washing Durability ◽  
Cinnamon Essential Oil ◽  
And Staphylococcus Aureus

The purpose of this work was to prepare chitosan–essential oil microcapsules using the simple coacervation method and to graft them onto cellulosic fibers to obtain bio functional textile. The microcapsules morphology was characterized by optical microscopy. The 2D dimethyloldihydroxyethylene urea resin (DMDHEU) was used as a binding agent to graft microcapsules on the surface of cellulosic fibers. Scanning Electron Microscopy (SEM) photographs and Attenuated Total Reflectance-Fourier Transformed Infrared (ATR-FTIR) analyses were performed to prove the interaction between cellulosic fibers and microcapsules. Furthermore, the properties of the different fabrics such as mechanical strength and air permeability were investigated. Furthermore, washing durability was evaluated. Finally, the antibacterial activity of the finished fibers against the strains Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) was evaluated. The results evidence the ability of treated fabrics to induce bacteria growth inhibition. The coacervation method is a simple process to incorporate cinnamon essential oil on the cellulosic fiber’s surface. The use of essential oils as active agents seems to be a promising tool for many protective textile substrates such as antimicrobial masks, bacteriostatic fabrics and healthcare textiles.

scholarly journals Monitoring of Antimicrobial Activity of Essential Oils Using Molecular Markers

2009 ◽  
Vol 3 (1) ◽  
pp. 103-107 ◽  
Author(s):  
Hend A. Hamedo
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oil ◽  
Essential Oils ◽  
Antimicrobial Agents ◽  
Random Amplified Polymorphic Dna ◽  
Antimicrobial Effect ◽  
E Coli ◽  
Specific Effects ◽  
And Staphylococcus Aureus ◽  
Rosemary Essential Oil

Technological application of essential oils, as natural antimicrobial agents, to reduce the effect of pathogenic microorganisms, requires new methods of detection. The present work evaluated the parameters of antimicrobial activity of the essential oils of rosemary (Rosmarinus officinalis) on two pathogenic strains Escherichia coli and Staphylococcus aureus. The MBC and MIC values were of 2.5, 25 μl ml-1, and values of 1.25 and 5 μl ml-1 for the two strains respectively. In this study, an attempt has been made to evaluate randomly amplified polymorphic DNA (RAPD) analysis for its potential to establish antimicrobial effect of rosemary essential oil. For the preliminary assessment, this study compared the effects occurring at molecular levels in E. coli and Staph. aureus exposed to rosemary essential oil at the MIC concentrations for the two organisms. The qualitative modifications arising in random amplified polymorphic DNA (RAPD) profiles as a measure of DNA effects were compared with control which showed many differences. In conclusion, the measurement of parameters at molecular levels is valuable for investigating the specific effects of agents interacting with DNA.

scholarly journals Antibacterial Activity of Kaempferia Galanga L. Hard Candy Against Streptococcus pyogenes and Staphylococcus aureus Bacteria Growth

2021 ◽  
Vol 2 (1) ◽  
pp. 1-8
Author(s):  
Maria Belgis ◽  
Ahmad Nafi’ ◽  
Giyarto Giyarto ◽  
Afina Desi Wulandari
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Essential Oil ◽  
Streptococcus Pyogenes ◽  
Volatile Content ◽  
Bacteria Growth ◽  
Kaempferia Galanga ◽  
Oil Concentration ◽  
And Staphylococcus Aureus ◽  
Hard Candy

Aromatic ginger (Kaempferia Galanga L.) is a spice plant that has a high volatile content with active compounds of ethyl p-methoxy cinnamate (23.65%) and ethyl cinnamate (5.98%). These two compounds have been reported to have antibacterial activity against Streptococcus pyogenes and Staphylococcus aureus, which are two types of bacteria that can cause sore throat. The application of aromatic ginger essential oil on hard candy can potentially reduce inflammation in the throat. This study aims to determine the effect of aromatic ginger essential oil concentration on hard candy in inhibiting the growth of Streptococcus pyogenes and Staphylococcus aureus bacteria and to determine their acceptance by the panelists. This research was conducted with 6 treatments of variations in the concentration of aromatic ginger essential oil, including 0%, 0.2%, 0.4%, 0.6%, 0.8%, and 1%. The results showed that the higher the concentration of aromatic ginger essential oil on hard candy would further increase the inhibition of the growth of Streptococcus pyogenes and Staphylococcus aureus bacteria. The highest inhibitory activity and the highest panelist acceptance was 1% essential oil concentration with 3.29% moisture content, 0.12% ash content, and 7.13% reducing sugar. The use of aromatic ginger essential oil on hard candy as a flavoring and well as inhibiting the growth of strep throat-causing bacteria (Streptococcus pyogenes and Staphylococcus aureus) has the potential to be developed. Keywords: Antibacterial, hard candy, aromatic ginger, essential oil, Streptococcus pyogenes, Staphylococcus aureus

scholarly journals Antibacterial and anti-biofilm activity of cinnamon essential oil and eugenol

2019 ◽  
Vol 49 (1) ◽  
Author(s):  
Alessandra Farias Millezi ◽  
Karine Angélica Dalla Costa ◽  
José Maria Oliveira ◽  
Susana Patrícia Lopes ◽  
Maria Olívia Pereira ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Essential Oil ◽  
Food Processing ◽  
Bacterial Biomass ◽  
Cinnamomum Zeylanicum ◽  
Viable Cells ◽  
Cinnamon Essential Oil ◽  
And Staphylococcus Aureus

ABSTRACT: Biofilms are responsible for most of the interference caused by microorganisms in food processing. The aim of this study was to evaluate the cinnamon (Cinnamomum zeylanicum) essential oil and eugenol sanitizer and anti-biofilm activity against biofilms. Concentrations used of essential oil were 0.0% (control) 0.12%; 0.48%; 0.96% and 1.92%; the amount of eugenol was 0.76%. Concentrations were determined from other published studies. Number of viable cells and quantification the bacterial biomass were determined. Anti-biofilm treatment was effective in preventing the formation of biofilms. The 1.92% concentration was the most satisfactorily with Escherichia coli reduction of 5.91log CFUcm-2 and Staphylococcus aureus reduction of 5.17log CFUcm-2 (P<0.05) biomass of the two bacteria. Sanitizing treatment was not effective in reducing biomass. Seen this, the cinnamon and eugenol essential oil may be promising alternatives for controlling biofilms.

scholarly journals Chemical composition and antibacterial activities of the essential oils of Plectranthus glandulosus and Cinnumomum zeylrrnicum from Cameroon

2002 ◽  
Vol 70 (1) ◽  
pp. 93-99 ◽  
Author(s):  
Jirovetz Leopold ◽  
Buchbauer Gerhard ◽  
Ngassoum Martin B. ◽  
Essia-Ngang Jean J. ◽  
Tatsadjieu Leopold N. ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Active Component ◽  
Solid Medium ◽  
Antibacterial Activities ◽  
Dilution Method ◽  
Aromatic Plants ◽  
E Coli ◽  
And Staphylococcus Aureus ◽  
Type Apparatus

Two aromatic plants have been selected for chemical investigation on account of their antibacterial activities, Plectranthus glandulosus (fresh leaves) and Cinnamomum zeylunicum (dried leaves). P. glandulosus is used as a medicinal plant, while Cinnamomum zeylunicum is used as a common spice in many recipes in Cameroon. The essential oils of the plants have been obtained by hydrodistillation using a Clevenger type apparatus, the yields of oils are about 0.3% and 2.0% respectively.The essential oil of P. glandulosus contains mainly β-thujone (about 31%), p-cymen-8-01 (about 25%) and neral (about 10%) and the essential oil of C. zcylcinicum is characterised by a high percentage of eugenol (85%).These essential oils have been tested against three strains of bacteria, namely Pseudornonas fluorescens. Escherichiu coli and Staphylococcus aureus; qualitative tests (diffusion through solid medium) and quantitative tests (dilution method) have been carried out. P. fluorescens shows a higher resistance to the two oils (MIC values not less than 5000 ppm). E. coli is more sensitive to these oils, while against S uureus the essential oil of C. zcylcinicum still shows a high activity (3500 ppm).The antibacterial activities of the essential oils could be attributed to the components eugenol as the active component of C. zcylcinicum and β-thujone and p-cymen-4-01 of the essential oil of P. glandulosus.

DECONTAMINATION OF VETERINARY SURVEILLANCE OBJECTS BY NEW GENERATION MEDICINE

1970 ◽  
pp. 64-67
Author(s):  
М. S. Saypullaev ◽  
А. U. Koychuev ◽  
Т. B. Mirzoeva
Keyword(s):  
Staphylococcus Aureus ◽  
Inhalation Exposure ◽  
Gram Negative Bacteria ◽  
Hazard Class ◽  
E Coli ◽  
Highly Efficient ◽  
Mucous Membranes ◽  
Environmentally Safe ◽  
New Generation ◽  
And Staphylococcus Aureus

The successful conduct of disinfection measures largely depends on the availability of veterinary practice a highly efficient, environmentally safe disinfectants. In this regard, finding new highly efficient disinfectant remains relevant. Studies found that the "Polied" (OOO "Razvitie XXI Vek, Russia) can be attributed to the highly efficient and environmentally friendly means. Solutions "Polied" have a high disinfectant activity against smooth and rough surfaces in the laboratory against gram-positive, gram-negative bacteria, mycobacteria and spores of microorganisms. Studies have established that solutions should be "Polied" obezzarajivatmi E. coli (EA 1257) concentrations of 0.1% on smooth surfaces and Staphylococcus aureus concentration of 0.05% in 1 hour from the calculation of 0.25-0.3 litres/m2. Disinfection of rough test surfaces against Escherichia coli and Staphylococcus aureus occurred after treatment with 0,3% solution of 3-hour exposure, at a rate of 0.5 l/m2. It was also found that 1.0% solution "Polied" fully obezzarazhivatel test the surface of mycobacteria (PCs-5) and at double the 0.6% concentration for 24 hours. Disinfection of rough test surfaces contaminated with spores of B. cereus (PCs 96) was achieved with a 4.0% solution at twice the irrigation rate of 0.5 l/m2 at an exposure of 24 hours. Toxicity solutions of the drug "Polied" refer to "moderate" threat (hazard class 3) and low-hazard substances (4 hazard class) when applied to the skin, mucous membranes of the eyes, and inhalation exposure on the respiratory system.

Comparison of the Effects of Silver in Nanostructured and Ultrahigh Diluted Form on Growth and Volatile Compounds Produced by Escherichia coli and Staphylococcus aureus

2020 ◽  
Vol 10 (3) ◽  
pp. 316-329
Author(s):  
Fateme Mirzajani ◽  
Amin Hamidi
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Life Cycles ◽  
Gas Chromatography Mass Spectrometry ◽  
Untreated Sample ◽  
E Coli ◽  
Volatile Metabolites ◽  
Octyl Acetate ◽  
Volatile Organic ◽  
And Staphylococcus Aureus

Introduction: In this project, the growth and volatile metabolites profiles of Escherichia coli (E. coli ) and Staphylococcus aureus were monitored under the influence of silver base chemical, nanoparticle and ultra-highly diluted compounds. Materials & Methods: The treatments were done for 12000 life cycles using silver nanoparticles (AgNPs) as well as ultra-highly diluted Argentum nitricum (Arg-n). Volatile organic metabolites analysis was performed using gas chromatography mass spectrometry (GC-MS). The results indicated that AgNPs treatment made the bacteria resistant and adapted to growth in the nanoparticle condition. The use of ultra-highly diluted Arg-n initially increased growth but it decreased later. Also, with the continuous usage of these materials, no more bacterial growth was observed. Results: The most important compounds produced by E. coli are Acetophenone, Octyl acetate, Styrene, 1,8-cineole, 4-t-butyl-2-(1-methyl-2-nitroethyl)cyclohexane, hexadecane and 2-Undecanol. The main compounds derived from S. aureus are Acetophenone,1,8-cineole, Benzaldehyde, 2-Hexan-1-ol, Tridecanol, Dimethyl Octenal and tetradecane. Acetophenone and 1,8-cineole were common and produced by both organisms. Conclusion: Based on the origin of the produced volatiles, main volatiles percentage of untreated sample is hydrocarbon (>50%), while bacteria treatments convert the ratio in to aldehydes, ketones and alcohols in the case of AgNPs, (>80%) and aldehydes, ketones and terpenes in the case of Arg-n (>70%).

scholarly journals Edible Films from Carrageenan/Orange Essential Oil/Trehalose—Structure, Optical Properties, and Antimicrobial Activity

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 332
Author(s):  
Jancikova Simona ◽  
Dordevic Dani ◽  
Sedlacek Petr ◽  
Nejezchlebova Marcela ◽  
Treml Jakub ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oil ◽  
Antibacterial Properties ◽  
Edible Films ◽  
Attenuated Total Reflectance ◽  
Practical Application ◽  
Film Properties ◽  
Gram Positive Bacteria ◽  
Edible Packaging ◽  
Orange Essential Oil

The research aim was to use orange essential oil and trehalose in a carrageenan matrix to form edible packaging. The edible packaging experimentally produced by casting from an aqueous solution were evaluated by the following analysis: UV-Vis spectrum, transparency value, transmittance, attenuated total reflectance Fourier-Transform spectroscopy (FTIR), scanning electron microscopy (SEM) and antimicrobial activity. The obtained results showed that the combination of orange essential oil with trehalose decreases the transmittance value in the UV and Vis regions (up to 0.14% ± 0.02% at 356 nm), meaning that produced films can act as a UV protector. Most produced films in the research were resistant to Gram-positive bacteria (Staphylococcus aureus subsp. aureus), though most films did not show antibacterial properties against Gram-negative bacteria and yeasts. FTIR and SEM confirmed that both the amount of carrageenan used and the combination with orange essential oil influenced the compatibility of trehalose with the film matrix. The research showed how different combinations of trehalose, orange essential oils and carrageenan can affect edible film properties. These changes represent important information for further research and the possible practical application of these edible matrices.

Sign in / Sign up

Export Citation Format

Share Document