Antibacterial activity of multilayer silver–copper surface films on catheter material

1993 ◽  
Vol 39 (9) ◽  
pp. 895-899 ◽  
Author(s):  
Robert J. C. McLean ◽  
A. A. Hussain ◽  
Michael Sayer ◽  
Peter J. Vincent ◽  
David J. Hughes ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Staphylococcus Epidermidis ◽  
Surface Film ◽  
Copper Surface ◽  
Butyl Rubber ◽  
Great Promise ◽  
Surface Films ◽  
Colony Forming Units ◽  
Coated Surfaces ◽  
And Staphylococcus Aureus

The antimicrobial activity of Ag, Cu, and layered Ag–Cu surface films, sputter-coated onto several types of catheter material, against clinical isolates of Staphylococcus epidermidis and Staphylococcus aureus was evaluated. When 20 μL of a suspension of S. epidermidis or S. aureus (2.68 × 106 colony-forming units/mL) was applied onto Ag–Cu- or Cu-coated butyl rubber, bacterial numbers were greatly reduced within 10 h, and eliminated within 24 h. In contrast, antibacterial activity was significantly less on uncoated or Ag-coated surfaces. Ag–Cu- or Cu-coated silicon rubber, polyvinylchloride, and teflon were even more effective than Ag–Cu- or Cu-coated butyl rubber. Ag–Cu layered surface films also showed antibacterial activity against Pseudomonas aeruginosa biofilm formation. Multiple metal surface film combinations show great promise in lowering the incidence of device-associated nosocomial infections.Key words: copper, silver, antimicrobial surface coating, catheter, nosocomial infections, metallic thin film combinations.

scholarly journals Aktivitas Antibakteri Ekstrak Daun Jarak Pagar (Jatropha Curcas L) Terhadap Staphylococcus Epidermidis Dan Staphylococcus Aureus Secara In Vitro

2018 ◽  
Vol 7 (1) ◽  
Author(s):  
Susilo Yulianto ◽  
Sunarmi Sunarmi
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Jatropha Curcas ◽  
Staphylococcus Epidermidis ◽  
Leaf Extract ◽  
Inhibitory Zone ◽  
Zone Diameter ◽  
Jatropha Curcas L ◽  
Inhibitory Power ◽  
And Staphylococcus Aureus

Abstract: Jatropha Leaves, Staphylococcus Epidermidis, Staphylococcus Aureus. Jatropha curcas L leaves contain tannins, saponins and flavonoids. According to some studies, tannins, saponins and flavonoids have antibacterial power. Based on these indications, it is important to do research on antibacterial potency of jatropha leaf extract (Jatropha curcas L) against Staphylococcus epidermidis and Staphylococcus aureus bacteria. The aim of this research is to know Antibacterial Activity of Jatropha curcas L Extract on Staphylococcus epidermidis and Staphylococcus aureus". This research. An experimental study by testing the antibacterial activity of leaf extract and jatropha result of maceration, infundation and reflux as measured by Minimal Inhibitory Concentration (KHM) on growth of Staphylococcus epidermidis and Staphylococcus aureus bacteria. From the results of the research, it was found that the extract of the reflux was brownish green and the characteristic of jatropha leaves. The amount of extract produced was 17.03 g, so the yield was 17.03%. Jatropha leaf extract of maceration has no inhibitory power to S. epidermidis in 4 series concentrations starting from 3.125 ppm to 25.000 ppm. Inhibitory zones begin to appear at concentrations of 50,000 ppm and increase at concentrations of 100,000 ppm. The drag zone diameter in the Jatropha curcas extract of the reflux showed the inhibitory power in all series of concentrations. The smallest inhibitory zone was shown at a concentration of 3,125 ppm (9.33 mm) and increased with increasing concentrations. The diameter of the inhibit zone was greatest at 100,000 ppm concentrations of 22.67 mm. Description of inhibitory zone diameter of methanol leaf extract of jatropha result of maceration and reflux to S. epidermidis. The conclusion of this research is extract of reflux result giving bigger resistance than maceration extract to S. epidermidis and S. aureus. Methanol extract of jatropha from the maceration and reflux have strong antibacterial activity against S. epidermidis and S. aureus but still under Klindamycin.

scholarly journals Antibacterial Activity of Extract and Fraction From Shitake Mushroom (Lentinula edodes) Against Acne Bacteria

2018 ◽  
Vol 6 (1) ◽  
pp. 36
Author(s):  
Ika Kurnia Sukmawati ◽  
Ari Yuniarto ◽  
Widhya Alighita ◽  
Ade Zam-zam J
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Ethyl Acetate ◽  
Staphylococcus Epidermidis ◽  
Propionibacterium Acnes ◽  
Ethyl Acetate Fraction ◽  
Hexane Fraction ◽  
Lentinus Edodes ◽  
Shiitake Mushrooms ◽  
And Staphylococcus Aureus

Acne is an inflammatory disease that occurs in the skin triggered by the bacteria acne treatment can be done by using natural materials that shiitake mushrooms (Lentinus edodes). This aims of this study were to determining the antibacterial activity of extracts and fractions shiitake mushrooms with broth microdilution method, determining the value of equality shiitake mushrooms with antibacterial comparison and determining the morphological changes of bacteria after exposure to the test sample with a Scanning Electron Microscope (SEM). Tests conducted antibacterial activity against Propionibacterium acnes, Staphylococcus epidermidis and Staphylococcus aureus at concentrations used is 1 ppm, 2 ppm, 4 ppm, 8 ppm, 16 ppm, 32 ppm, 64 ppm, 128 ppm, 256 ppm, 512 ppm. Best MIC value obtained in fraction of ethyl acetate and n-hexane fraction of the bacterium Propionibacterium acnes, Staphylococcus epidermidis and Staphylococcus aureus at a concentration of 256 ppm. KBM value of the n-hexane fraction against Staphylococus aureus bacteria at concentrations of 512 ppm and ethyl acetate fraction against bacteria Staphylococus aureus and epidermidis at a concentration of 512 ppm. Value equality is obtained 1 mg of ethyl acetate fraction of shiitake mushrooms equivalent to 5.346 x 10-2 mg of tetracycline. SEM test results showed the presence of antibacterial activity which is indicated by a change in cell morphology, their lumps and their cell wall frown on Propionibacterium acnes were exposed to ethyl acetate fraction.Key words: Acne, Lentinus edodes, antibacterials, microdilution, SEM

Corrosion Resistant Coatings for Aluminum by Hydrothermal Film Formation in Alkaline Li-Salt Solutions

1996 ◽  
Vol 432 ◽  
Author(s):  
R.G. Buchheit ◽  
M.A. Martinez ◽  
C.B. Cooper
Keyword(s):  
Transition Metal Oxides ◽  
Film Formation ◽  
Surface Film ◽  
Al Alloys ◽  
Surface Films ◽  
Salt Solutions ◽  
Corrosion Resistant ◽  
Inorganic Coatings ◽  
Coated Surfaces ◽  
Corrosion Resistant Coatings

AbstractNew methods of forming corrosion resistant inorganic coatings on Al and Al alloys are required due to environment and work safety hazards associated with the currently used Cr-based coatings technologies. In this paper we report on certain specific aspects of Al surface film formation that can be exploited to form highly corrosion resistant coatings. The aspects discussed include: formation of hydrotalcite surface films, Li2[Al2 (OH)6]2 CO3nH2O, by exposure to Li-salt solutions, elimination of unwanted Cu compounds that accumulate surface films formed on Cubearing Al alloys, and generation of high corrosion resistance by precipitating transition metal oxides on to alkaline hydrotalcite coated surfaces.

scholarly journals ISOLASI DAN UJI AKTIVITAS DAYA HAMBAT EKSTRAK ETANOL BIJI PINANG (Areca catechu L.) TERHADAP BAKTERI PADA LIDAH

2019 ◽  
Vol 1 (3) ◽  
pp. 177-188
Author(s):  
Meiriza Djohari ◽  
Wulandari Yulia Putri ◽  
Erniza Pratiwi
Keyword(s):  
Antibacterial Activity ◽  
Staphylococcus Epidermidis ◽  
Ethanol Extract ◽  
Diffusion Method ◽  
Natural Material ◽  
Betel Nut ◽  
Areca Catechu ◽  
Inhibitory Power ◽  
Branhamella Catarrhalis ◽  
And Staphylococcus Aureus

Betel  nut (Areca catechu L.) is a natural material that has antibacterial activity in treating diseased on teeth, halitosis and can inhibit of dental caries. The objective of this research is type of bacteria based on morphology, the results of bacterial identification tests on the tongue and to determine the effect of the inhibitory power of betel nut ethanol extract (Areca catechu L.) to bacteria of the tongue. Antibacterial activity testing using disc diffusion method with various concentrations of 10%, 20% and 30%. Secondary metabolite contents  are alkaloid, terpenoid and flavonoid.The results obtained from the identification test based on the color of bacteria Branhamella catarrhalis, Staphylococcus epidermidis and Straphylococcus aureus. Ethanol extract of areca nut (Areca catechu L.) is better to inhibiting the growth of Staphylococcus epidermidis and Staphylococcus aureus compared to Branhamella catarrhalis. Based on Two Way Anova statistical data on inhibitory zone diameters, there were differences between the concentration groups of 10%, 20% and 30% and there were significant differences in the inhibitory activity of Branhamella catarrhalis bacteria compared to Staphylococcus epidermidis and Straphylococcus aureus bacteria but not significantly different between Staphylococcus epidermidis and Straphylococcus aureus bacteria

scholarly journals ISOLASI DAN UJI ANTIBAKTERI DARI ISOLAT BAKTERI YANG BERASOSIASI DENGAN SPONS Callyspongia aerizusa SERTA IDENTIFIKASI SECARA BIOKIMIA

PHARMACON ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 380
Author(s):  
Angelika Liempepas ◽  
Widya A. Lolo ◽  
Paulina V. Y. Yamlean
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Streptococcus Pyogenes ◽  
Staphylococcus Epidermidis ◽  
Health Sector ◽  
Salmonella Typhi ◽  
Diffusion Method ◽  
Agar Disc ◽  
And Staphylococcus Aureus

ABSTRACT               Sponge Callyspongia aerizusa contain potential bioactive compound that can be utilized in the health sector. Extract of sea sponge Callyspongia aerizusa, can hamper the growth of Salmonella typhi bacteria, Streptococcus pyogenes, Shigella and Staphylococcus epidermidis. The aim of this study was to test the antibacterial activity against Escherichia coli and Staphylococcus aureus bacteria and identify the type of symbionic bacteria of Callyspongia aerizusa sponge based on their physiological and biochemical characteristics. The method of testing the antibacterial activity was agar diffusion method (Kirby and Baurer diffusion disc). There were three bacterial isolates namely T1, T2, and T3 isolates. The result showed that T1, T2, and T3bacterial isolates had antibacterial activity against Escherichia coli and Staphylococcus aureus test bacteria. Based on the biochemical test, T2bacterial isolates were identified as Bronchothrix bacteria and T1and T3 bacterial identified as Desulfotomaculum. Keywords: Callyspongia aerizusa, Antibacterial activity, symbiont bacteria, Biochemical Identification   ABSTRAKSpons Callyspongia aerizusa memiliki kandungan senyawa bioaktif potensial yang dapat dimanfaatkan dibidang kesehatan. Ekstrak spons laut Callyspongia aerizusa dapat menghambat pertumbuhan bakteri Salmonella typhi, Streptococcus pyogenes, Shigella dan Staphylococcus epidermidis. Penelitian ini bertujuan untuk menguji aktivitas antibakteri dari bakteri simbion spons Callyspongia aerizusa terhadap bakteri Escherichia coli dan Staphylococcuc aureus dan mengidentifikasi jenis bakteri simbion spons Callyspongia aerizusa berdasarkan karakteristik fisiologis dan biokimianya. Metode pengujian aktivitas antibakteri yang digunakan yaitu metode difusi agar (disc diffusion Kirby and Baurer). Terdapat tiga isolat bakteri yaitu isolat T1, T2, dan T3. Hasil penelitian menunjukan bahwa isolat bakteri T1, T2, dan T3 memiliki aktivitas antibakteri terhadap bakteri uji Escherichia coli dan Staphylococcuc aureus. Berdasarkan uji biokima, isolat bakteri T2 diduga sebagai bakteri Brochothrix dan  isolat bakteri T1 dan T3 diduga sebagai bakteri Desulfotomaculum.Kata kunci: Callyspongia aerizusa, Aktivitas antibakteri, Bakteri simbion, Identifikasi Biokimia

Surface Films on Zircaloy-2 Samples Cracked in Neutral Aqueous NaCl by Stress Corrosion

1973 ◽  
Vol 31 ◽  
pp. 46-47
Author(s):  
R.A. Ploc
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Film Thickness ◽  
Stress Corrosion ◽  
Zirconium Dioxide ◽  
Surface Film ◽  
Surface Films ◽  
Continuous Layer ◽  
Transmission Electron ◽  
Product Film

Samples of low-nickel Zircaloy-2 (material MLI-788-see(1)), when anodically polarized in neutral 5 wt% NaCl solutions, were found to be susceptible to pitting and stress corrosion cracking. The SEM revealed that pitting of stressed samples was occurring below a 2000Å thick surface film which behaved differently from normal zirconium dioxide in that it did not display interference colours. Since the initial film thickness was approximately 65Å, attempts were made to examine the product film by transmission electron microscopy to deduce composition and how the corrosion environment could penetrate the continuous layer.

scholarly journals Antibacterial Activity Test of Extracts and Fractions of Cassava Leaves (Manihot esculenta Crantz) against Clinical Isolates of Staphylococcus epidermidis and Propionibacterium acnes Causing Acne

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Resmi Mustarichie ◽  
Sulistiyaningsih Sulistyaningsih ◽  
Dudi Runadi
Keyword(s):  
Antibacterial Activity ◽  
Ethyl Acetate ◽  
Staphylococcus Epidermidis ◽  
Propionibacterium Acnes ◽  
Ethanol Extract ◽  
Ethyl Acetate Fraction ◽  
Clinical Isolates ◽  
Active Fraction ◽  
Cassava Leaves ◽  
Ethanol Extracts

This study is aimed at determining antibacterial activity from ethanol extracts and the most active fraction of cassava leaves against clinical isolates of Staphylococcus epidermidis and Propionibacterium acnes. Research carried out by the experimental method involved determination of plants, extraction with maceration method, fractionation with liquid-liquid extraction, antibacterial activity testing of extracts and fractions by agar diffusion method, determination of most active fraction from the extract, and minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) testing of most active fraction by microdilution method. The results showed that ethanol extracts of cassava leaves had antibacterial activity against both bacteria with the most active fraction indicated by ethyl acetate. MIC values of ethyl acetate fraction against S. epidermidis were in the concentration range of 2.5%–5.0% (w/v) and against P. acnes were in the concentration range of 1.25%–2.5% (w/v). The MBC value of ethyl acetate fraction against S. epidermidis was at a concentration of 5% (w/v), while P. acnes was at a concentration of 2.5% (w/v). From the results of this study, it can be concluded that the ethanol extract of cassava leaves (Manihot esculenta Crantz) has antibacterial activity against clinical isolates of Staphylococcus epidermidis as well as on Propionibacterium acnes. The fraction with the best activity from the ethanol extract of cassava leaves to the two test bacteria was shown by ethyl acetate fraction. It is suggested that cassava leaves are possible to be developed into standardized antiacne herbal.

Antibacterial Activity of Silver-Hydroxyapatite/Titania Nanocomposite Coating on Titanium against Oral Bacteria

2007 ◽  
Vol 330-332 ◽  
pp. 455-458 ◽  
Author(s):  
An Chun Mo ◽  
Wei Xu ◽  
Su Qin Xian ◽  
Yu Bao Li ◽  
Shi Bai
Keyword(s):  
Antibacterial Activity ◽  
Streptococcus Mutans ◽  
Porphyromonas Gingivalis ◽  
Nanocomposite Coating ◽  
Oral Bacteria ◽  
Tio2 Coating ◽  
Prevotella Intermedia ◽  
Anaerobic Incubation ◽  
Coating Method ◽  
Coated Surfaces

This study was focused on evaluating the bactericidal and anti-adhesive efficacy of silver-hydroxyapatite/ titania nanocomposites (nAg-HA/TiO2) coating on titanium against oral bacteria. Porphyromonas gingivalis, Prevotella intermedia and Fusohacterium nucleatum and Streptococcus mutans were used. Antibacterial activity of nAg-HA/TiO2 coating was investigated quantitatively using film applicator coating method and titanium plates incubated with bacteria were prepared for SEM to observe the adherence of oral bacteria. The viability of each type of bacteria on the antibacterial film was suppressed to about 10% after anaerobic incubation for 3 hours. Image of SEM demonstrated that bacteria on sandblasting surfaces were relatively confluent whilst on coated surfaces fewer bacteria were observed. Adherence of bacteria on nAg-HA / TiO2-coated surfaces compared with uncoated surfaces was remarkably decreased.

ON THE MECHANISM OF THE DISSOLUTION OF MAGNESIUM IN ACIDIC SALT SOLUTIONS: I. PHYSICAL CONTROL BY SURFACE FILMS

1953 ◽  
Vol 31 (9) ◽  
pp. 849-867 ◽  
Author(s):  
E. J. Casey ◽  
R. E. Bergeron
Keyword(s):  
Ionic Strength ◽  
Chemical Control ◽  
Corrosion Potential ◽  
Surface Film ◽  
Surface Films ◽  
Salt Solutions ◽  
Acidic Solutions ◽  
Activity Temperature ◽  
Acidic Salt ◽  
High Concentrations

A kinetic study and analysis has been made of the effects of ionic strength, acid activity, temperature, and salt type on the dissolution of magnesium in acidic salt solutions. This is an example of the simplest type of corrosion involving hydrogen evolution. The results are interpreted in terms of the effects of the various factors on the structure of a surface film which must be magnesium oxide and/or hydroxide even in acidic solutions. The importance of internal dissolutions in the film at high concentrations of attacking reagent, for this and other cases, is shown. Owing to complex formation, under certain conditions an odd case of "chemical control" of the dissolution rate in this simplest case becomes evident. Corrosion potential measurements aid in the interpretation.

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