scholarly journals Screening of some Malay medicated oils for antimicrobial activity

2010 ◽  
Vol 62 (2) ◽  
pp. 393-395
Author(s):  
Khalisanni Khalid ◽  
Hung Kiong
Keyword(s):  
Antimicrobial Activity ◽  
Antimicrobial Property ◽  
Antimicrobial Properties ◽  
Antimicrobial Activities ◽  
Clove Oil ◽  
Salmonella Spp ◽  
E Coli ◽  
Lemon Grass ◽  
Anticandidal Activity ◽  
Microbial Isolates

Oils from six Malay medicated oils, used traditionally in the treatment of infectious and septic diseases in humans, were tested for their antimicrobial property. The aim was to evaluate the antimicrobial properties of six Malay medicated oils against certain microbial isolates. Locally available Malay medicated oils were checked for their antimicrobial activities using six species of bacteria: E. coli, Salmonella spp., Klebsiella pneumoniae, Staphylococcus aureus, Streptococcus, Bacillus subtilis and 2 fungi with 1 yeast (Aspergillus niger, Penicillum spp. and Candida albicans). Clove oil showed the highest antibacterial activity followed, respectively, by 'bunga merah', cajaput, nutmeg, lemon grass and 'gamat' oil. Clove oil and lemon grass showed anticandidal activity. The Malay medicated oil studies did not show any antifungal activity. The study shows that Malay medicated oils, like antibiotics, have antimicrobial activities against some microorganisms.

scholarly journals Quaternary ammonium salt of chitosan: preparation and antimicrobial property for paper

Open Medicine ◽  
2015 ◽  
Vol 10 (1) ◽  
Author(s):  
Pengtao Liu ◽  
Weisheng Meng ◽  
Shuai Wang ◽  
Yonghui Sun ◽  
Muhammad Aqeel Ashraf
Keyword(s):  
Ammonium Chloride ◽  
Antimicrobial Property ◽  
Antimicrobial Properties ◽  
Inhibition Zone ◽  
Antimicrobial Activities ◽  
Inhibitory Effects ◽  
Zone Method ◽  
E Coli ◽  
H Nmr ◽  
Ft Ir

Abstract A series of 2-hydroxypropyltrimethyl ammonium chloride chitosan (HACC) was prepared by the reaction of chitosan with glycidyl trimethyl ammonium chloride. Structure of HACC was characterized by FT IR and 1H NMR spectroscopies, and it was proved that substitution reaction mainly occurs on the N element. Antimicrobial activities of HACC was examined against S. aureus, E. coli, and A. niger. Results indicatd that the inhibitory effects of HACC solutions were varied with HACC concentration, quaternization degrees, pH values, metal ions, and heat treatment. The antimicrobial properties of handsheets prepared from HACC were studied by the inhibition zone method, and the sheets had good antimicrobial properties against S. aureus and E. coli, and low inhibition rate against A. niger.

Disinfection of Fruits with Activated Water

2019 ◽  
Vol 10 ◽  
pp. 1864-1872
Author(s):  
Prof. Teodora P. Popova
Keyword(s):  
Antimicrobial Activity ◽  
Aqueous Solutions ◽  
Antimicrobial Properties ◽  
The Other ◽  
Gram Negative Bacteria ◽  
High Antimicrobial Activity ◽  
Gram Negative ◽  
E Coli ◽  
Number Of Microorganisms ◽  
Lower Effect

The effect of ionized aqueous solutions (anolytes and catholyte) in the processing of fruits (cherries, morellos, and strawberries) for decontamination has been tested. Freshly prepared analytes and catholyte without the addition of salts were used, as well as stored for 7 months anolytes, prepared with 0.5% NaCl and a combination of 0.5% NaCl and 0.5% Na2CO3. The anolyte prepared with a combination of 0.5% NaCl and 0.5% Na2CO3, as well as the anolyte obtained with 0.5% NaCl, exhibit high antimicrobial activity against the surface microflora of strawberries, cherries, and sour cherries. They inactivate E. coli for 15 minutes. The other species of the fam. Enterobacteriaceae were also affected to the maximum extent, as is the total number of microorganisms, especially in cherries and sour cherries. Even stored for 7 months, they largely retain their antimicrobial properties. Anolyte and catholyte, obtained without the addition of salts, showed a lower effect on the total number of microorganisms, but had a significant effect on Gram-negative bacteria, and especially with regard to the sanitary indicative E. coli.

scholarly journals Synergistic Antimicrobial Activities of Combinations of Vanillin and Essential Oils of Cinnamon Bark, Cinnamon Leaves and Cloves

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1406
Author(s):  
Rita Cava-Roda ◽  
Amaury Taboada-Rodríguez ◽  
Antonio López-Gómez ◽  
Ginés Benito Martínez-Hernández ◽  
Fulgencio Marín-Iniesta
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oils ◽  
Food Packaging ◽  
Antimicrobial Effect ◽  
Antimicrobial Activities ◽  
Inhibitory Effects ◽  
Cinnamon Bark ◽  
E Coli ◽  
Pure Compounds ◽  
Main Component

Plant bioactive compounds have antimicrobial and antioxidant activities that allow them to be used as a substitute for synthetic chemical additives in both food and food packaging. To improve its sensory and bactericidal effects, its use in the form of effective combinations has emerged as an interesting possibility in the food industry. In this study, the antimicrobial activities of essential oils (EOs) of cinnamon bark, cinnamon leaves, and clove and the pure compounds vanillin, eugenol, and cinnamaldehyde were investigated individually and in combination against Listeria monocytogenes and Escherichia coli O157:H7. The possible interactions of combinations of pure compounds and EOs were performed by the two-dimensional checkerboard assay and isobologram methods. Vanillin exhibited the lowest antimicrobial activity (MIC of 3002 ppm against L. monocytogenes and 2795 ppm against E. coli O157:H7), while clove and cinnamon bark EOs exhibited the highest antimicrobial activity (402–404 against L. monocytogenes and 778–721 against E. coli O157:H7). For L. monocytogenes, pure compound eugenol, the main component of cinnamon leaves and clove, showed lower antimicrobial activity than EOs, which was attributed to the influence of the minor components of the EOs. The same was observed with cinnamaldehyde, the main component of cinnamon bark EO. The combinations of vanillin/clove EO and vanillin/cinnamon bark EO showed the most synergistic antimicrobial effect. The combination of the EOs of cinnamon bark/clove and cinnamon bark/cinnamon leaves showed additive effect against L. monocytogenes but indifferent effect against E. coli O157:H7. For L. monocytogenes, the best inhibitory effects were achieved by cinnamon bark EO (85 ppm)/vanillin (910 ppm) and clove EO (121 ppm)/vanillin (691 ppm) combinations. For E. coli, the inhibitory effects of clove EO (104 ppm)/vanillin (1006 ppm) and cinnamon leaves EO (118 ppm)/vanillin (979 ppm) combinations were noteworthy. Some of the tested combinations increased the antimicrobial effect and would allow the effective doses to be reduced, thereby offering possible new applications for food and active food packaging.

scholarly journals Antimicrobial activities of laboratory produced essential oil solutions against five selected fungal strains

2013 ◽  
pp. 171-183 ◽  
Author(s):  
Emilija Ivanova ◽  
Natalija Atanasova-Pancevska ◽  
Dzoko Kungulovski
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oils ◽  
Antimicrobial Properties ◽  
Microtiter Plate ◽  
Antimicrobial Activities ◽  
Food Preservation ◽  
Minimal Inhibitory Concentrations ◽  
Fungal Strains ◽  
Treat Ment ◽  
Penicillium Spp

It is well known that essential oils possess significant antimicrobial activity. This study was conducted to estimate the antimicrobial activity of various types of Biokill, a laboratory produced solution composed of several essential oils (Biokill dissolved in 96% ethanol; Biokill 96% further dissolved in DMSO; Biokill dissolved in 70% ethanol and Biokill 70% further dissolved in DMSO). The antimicrobial activity was evaluated against five selected fungal strains, Candida albicans ATCC 10231, Saccharomyces cerevisiae ATCC 9763, Aspergillus niger I.N. 1110, Aspergillus sojae CCF and Penicillium spp. FNS FCC 266. A variation of the microtiter plate-based antimicrobial assay was used in order to assess the antimicrobial activity of the solutions. By applying this assay minimal inhibitory concentrations (MIC) of the Biokill solutions were determined for each strain of the selected test microorganisms. The results demonstrated that all variations of Biokill showed antimicrobial activity at concentrations lower than 2.5?g/mL. Biokill 70% further dissolved in DMSO showed the best antimicrobial properties against all the selected strains with MICs less than 1.25?g/mL. These results indicated that Biokill could find application in the pharmaceutical industry, in food preservation and conservation, in the prevention and treat?ment of plants infected by certain phytopathogens, etc.

scholarly journals Viability of lactic acid bacteria in different components of Ogi with anti diarrhoeagenic E. coli activities

2019 ◽  
Vol 3 (6) ◽  
pp. 206-213
Author(s):  
Roseline Eleojo Kwasi ◽  
Iyanuoluwa Gladys Aremu ◽  
Qudus Olamide Dosunmu ◽  
Funmilola A. Ayeni
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Antimicrobial Properties ◽  
Culture Method ◽  
Antimicrobial Activities ◽  
Drying Methods ◽  
Bacterial Strains ◽  
E Coli ◽  
Log Reduction ◽  
Freeze Dried

Background: Ogi constitutes a rich source of lactic acid bacteria (LAB) with associated health benefits to humans through antimicrobial activities. However, the high viability of LAB in Ogi and its supernatant (Omidun) is essential. Aims: This study was carried out to assess the viability of LAB in various forms of modified and natural Ogi and the antimicrobial properties of Omidun against diarrhoeagenic E coli. Methods and Material: The viability of LAB was assessed in fermented Ogi slurry and Omidun for one month and also freeze-dried Ogi with and without added bacterial strains for two months. A further 10 days viability study of modified Omidun, refrigerated Omidun, and normal Ogi was performed. The antimicrobial effects of modified Omidun against five selected strains of diarrhoeagenic E. coli (DEC) were evaluated by the co-culture method. Results: Both drying methods significantly affected carotenoids and phenolic compounds. The Ogi slurry had viable LAB only for 10 days after which, there was a succession of fungi and yeast. Omidun showed 2 log10cfu/ml reduction of LAB count each week and the freeze-dried Ogi showed progressive reduction in viability. Refrigerated Omidun has little viable LAB, while higher viability was seen in modified Omidun (≥2 log cfu/ml) than normal Omidun. Modified Omidun intervention led to 2-4 log reduction in diarrhoeagenic E. coli strains and total inactivation of shigella-toxin producing E. coli H66D strain in co-culture. Conclusions: The consumption of Ogi should be within 10 days of milling using modified Omidun. There are practical potentials of consumption of Omidun in destroying E. coli strains implicated in diarrhea. Keywords: Ogi, Omidun, lactic acid bacteria, diarrhoeagenic Escherichia coli strains, Viability.

scholarly journals Synthesis, Molecular Docking and Antimicrobial Evaluation of Some Benzothiazoles

2021 ◽  
Author(s):  
Smita J. Pawar ◽  
Amol Kale ◽  
Priya Zori ◽  
Rahul Dorugade
Keyword(s):  
Antimicrobial Activity ◽  
Antimicrobial Property ◽  
Docking Study ◽  
Gram Negative Bacteria ◽  
Zone Of Inhibition ◽  
E Coli ◽  
Good Antibacterial Activity ◽  
Comparable Activity ◽  
Antimicrobial Evaluation ◽  
Bacteria And Fungi

Abstract Abstract The new series of 2-(substituted amino)-N-(6- substituted-1,3-benzothiazol-2yl) acetamide BTC(a-t) has been synthesized by appropriate synthetic route from substituted 2-amino benzothiazole. The synthesized compounds were screened experimentally for its antimicrobial property against gram positive, gram negative bacteria and fungi. Zone of inhibition and minimum inhibitory concentration of compounds was determined against selected bacterial and fungal strains. Compound BTC-j N-(6-methoxy-1,3-benzothiazol-2-yl)-2-(pyridine-3-yl amino) acetamide and compound BTC-r N-(6-nitro-1,3-benzothiazol-2-yl)-2-(pyridine-3-yl amino) acetamide found to have good antimicrobial potential. The compound BTC-j has shown good antibacterial activity against S. aureus at MIC of 12.5 µg/ml, B. subtilis at MIC of 6.25µg/ml, E. coli at MIC of 3.125µg/ml and P. aeruginosa at MIC of 6.25µg/ml. No statistical difference in antimicrobial activity of standard and test compounds was found indicating test compounds have comparable activity. Further docking study was carried out to check the probable interactions with the selected protein using V-life MDS 3.5 software. (DNA gyrase, PDB: 3G75). The dock score of compounds and antimicrobial activity found to be consistent.

scholarly journals Justification of sorption composite usage on the basis of nanodisperse silica for sepsis prevention in complex treatment of purulent-inflammatory processes

2019 ◽  
Vol 41 part 3 (2) ◽  
pp. 45-50
Author(s):  
O. A. Viltsaniuk ◽  
P. V. Belyaev ◽  
T. P. Osolodchenko ◽  
O. O. Viltsaniuk
Keyword(s):  
Antimicrobial Activity ◽  
Antimicrobial Properties ◽  
Statistical Processing ◽  
Toxic Substances ◽  
Adhesive Properties ◽  
Adhesion Properties ◽  
E Coli ◽  
Adhesion Ability ◽  
Treatment And Prevention ◽  
Inflammatory Processes

Introduction. The problem of purulent-inflammatory processes treatment and the prevention of sepsis remains one of the most pressing problems of surgery.Purpose of the study. Is to estimate the effectiveness of sorption composition with antimicrobial properties on the basis of nanodisperse silica on the adhesive properties of microorganisms and to substantiate the expediency of its use for the purulent and inflammatory processes treatment and prevention of sepsis.Materials and methods.To determine the antimicrobial activity and the influence of the antiseptics of decasan, myramistin, ethonium, chlorhexidine and the sorption on the microorganisms adhesion properties composition was used the method of diffusion in agar of the museum strains of microorganisms S. Aureus ATCC 25923, E. Coli ATCC 25922, R. Vulgaris 4636, R. Aureginosa ATCC 27853, S. AIbicans 855/653, SI. Perfringens 28, Peptostreptococcus anaerobicus 22, Bacteroides fragilis 13/83, and clinical strains of S. Aureus, R. Aeuroginosa, E. Coli. Adhesive properties of microorganisms were studied according to the Brillis method et al. (1986) with the subsequent statistical processing of the data.Results. Studies have shown that antiseptics have high antimicrobial activity and reduce the adhesion ability of microorganisms. But the use of only antiseptics or only antibiotics for the purification of purulent foci can lead to toxins absorption and tissue decay products from purulent foci. That processes could be the trigger mechanism for sepsis development. The sorption composition is able to reduce the adhesive activity of bacteria, allows to absorb toxic substances from pathological foci, what preventing their resorption and thereby prevent the development of sepsis.Conclusions. The composition made from sorbents and antiseptics is not inferior to antimicrobial activity to antiseptics, which can reduce the virulence of bacteria, by reducing their adhesive activity, and absorb toxins of microorganisms and tissue decomposition products on their surface, thus prevent their absorption, which will prevent the purulent-inflammatory process progression and sepsis development.Keywords: sorption composition, nanodisperse silica, antiseptics, adhesive properties of microorganisms, prevention of sepsis.

Exposure-Dependent Antimicrobial Activity and Oxidative Properties of Polymer-Based Graphene Oxide Nanocomposites

2019 ◽  
Vol 947 ◽  
pp. 13-20
Author(s):  
Jem Valerie D. Perez ◽  
Joy Vanessa D. Perez ◽  
Raniv D. Rojo ◽  
Maria Lourdes P. Dalida ◽  
Debora F. Rodrigues
Keyword(s):  
Antimicrobial Activity ◽  
Graphene Oxide ◽  
Membrane Damage ◽  
Antimicrobial Properties ◽  
Dynamic Contact ◽  
Bacterial Inactivation ◽  
E Coli ◽  
Enhanced Production ◽  
Prolonged Contact ◽  
Species Production

Bacterial proliferation and biofilm formation has emerged as a significant concern in the long-term use of industrial apparatus. This study describes the antimicrobial properties of a novel chitosan-polyethyleneimine-graphene oxide (CS-PEI-GO) nanocomposite against E. coli. The nanocomposite is a stable material with minimal dispersibility in storage water after more than 7 days. The antimicrobial activity is contact-time-dependent, with direct contact (92% bacterial inactivation after 3h exposure) having superior results compared with dynamic contact (~50% inactivation after 3h exposure). In addition, the incorporation of GO also translated to enhanced production of ROS—oxidation of GSH was higher in CS-PEI-GO (31.78%) as compared to CS-PEI alone (5.69%). This may be attributed to previously proposed mechanisms of mechanical membrane damage and reactive oxygen species production that may be more pronounced with prolonged contact. This may be due to the positively charged chitosan and the negatively charged cell membrane facilitating the coating of cells that could allow the oxygen-containing functional groups of GO to induce oxidative stress and lead to cell death.

Antimicrobial Activity of Photoactive Cerium Doped Zinc Oxide

2020 ◽  
Vol 307 ◽  
pp. 217-222 ◽  
Author(s):  
Maishara Syazrinni Rooshde ◽  
Wan Rafizah Wan Abdullah ◽  
Amie Zaidah Amran ◽  
Noradhiha Farahin Ibrahim ◽  
Fazilah Ariffin ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Uv Light ◽  
Light Exposure ◽  
Antimicrobial Properties ◽  
Diffusion Method ◽  
Gram Positive ◽  
E Coli ◽  
Antifouling Agent ◽  
Doped Zno ◽  
Zno Powder

Biofouling and biofilms exist as ubiquitous, undesirable accumulation of flora and fauna upon a given substrate when being immersed into an aquatic medium. Therefore, a novel antifouling based materials with the incorporation of nanotechnology has been developed for the prevention of biofouling in its initial stage through photocatalytic treatment. This study investigated the antimicrobial properties of photoactive Cerium (Ce) doped ZnO powder and explores its potential properties for future antifouling application. ZnO nanoparticles was doped with 0.4 mol% Ce was synthesized through the combination of modified citrate gelation technique and solid state sintering. The successful preparation of Ce doped ZnO was confirmed by XRD and SEM. The antimicrobial activity of Ce doped ZnO against E. coli and S. aureus was determined through antibacterial susceptibility test by agar well diffusion method whilst its photocatalytic inactivation efficiency against selected bacteria was analysed through photodegradation testing under UV light irradiation. The findings demonstrated that the synthesized Ce doped ZnO powder exhibited antibacterial effect against Gram-positive bacteria (S. aureus) and excellent photocatalytic efficiency to inactivate both Gram-negative (E. coli) and Gram-positive (S. aureus). 2 g/L of Ce doped ZnO catalyzed the 100% disinfection of both bacteria in 180 min of UV light exposure. Thus, this proved that Ce doped ZnO powder has the potential as efficient antifouling agent.

Screening of Antimicrobial Activity and Cytotoxic Effects of Two Cladonia Species

2013 ◽  
Vol 68 (5-6) ◽  
pp. 191-197 ◽  
Author(s):  
Birkan Açıkgöz ◽  
İskender Karaltı ◽  
Melike Ersöz ◽  
Zeynep M. Coşkun ◽  
Gülşah Çobanoğlu ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Antimicrobial Activities ◽  
Chloroform Extract ◽  
Cytotoxic Effects ◽  
Minimal Inhibitory Concentrations ◽  
E Coli ◽  
Methanol Extracts ◽  
Gram Positive Bacteria

The present study explores the antimicrobial activity and cytotoxic effects in culture assays of two fruticose soil lichens, Cladonia rangiformis Hoffm. and Cladonia convoluta (Lamkey) Cout., to contribute to possible pharmacological uses of lichens. In vitro antimicrobial activities of methanol and chloroform extracts against two Gram-negative bacteria (Pseudomonas aeruginosa and Escherichia coli), two Gram-positive bacteria (Enterococcus faecalis and Staphylococcus aureus), and the yeast Candida albicans were examined using the paper disc method and through determination of minimal inhibitory concentrations (MICs). The data showed the presence of antibiotic substances in the chloroform and the methanol extracts of the lichen species. The chloroform extracts exhibited more signifi cant antimicrobial activity than the methanol extracts. However, a higher antifungal activity was noted in the methanol extract of C. rangiformis. The maximum antimicrobial activity was recorded for the chloroform extract of C. convoluta against E. coli. The cytotoxic effects of the lichen extracts on human breast cancer MCF-7 cells were evaluated by the trypan blue assay yielding IC50 values of ca. 173 and 167 μg/ml for the extracts from C. rangiformis and C. convoluta, respectively.

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