Effect of growth temperature, surface type and incubation time on the resistance of Staphylococcus aureus biofilms to disinfectants

Effect of partial substitution of Ni in the high Tc superconductor single crystals Bi-Sr-Ca-Cu-O has been studied. Single crystals of Bi-Sr-Ca-Cu/Ni-O are grown from its stoichiometric melt. The addition of Nickel in this system ( Bi 2 Sr 2 Ca 1 Cu 2−x Ni x O y, x=0.1, 0.3) is found to change the growth temperature, superconducting transition temperature, surface morphology, and mechanical property.

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The Use of Salacca Zalacca Extract as Reducing Agent to Synthesize Silver Nanoparticles (Agnps) and the Antibacterial Activities.

Oriental Journal Of Chemistry ◽

10.13005/ojc/350513 ◽

2019 ◽

Vol 35 (5) ◽

pp. 1557-1564

Author(s):

Lis Permana Sari ◽

Zuhdi Saputro ◽

Maximus Pranjoto Utomo ◽

Anti Kolonial Prodjosantoso

Keyword(s):

Staphylococcus Aureus ◽

Silver Nanoparticles ◽

Antibacterial Activity ◽

Incubation Time ◽

Salmonella Typhi ◽

Reducing Agent ◽

Diffusion Method ◽

One Pot ◽

Extract Concentration ◽

Synthesize Silver Nanoparticles

In general, leaf, flower, and fruit of plants contain organic compounds which may reduce metal salts to nanosize metals, or nanoparticles (NPs). The extract of snake fruit (Salacca zallaca) has been used to synthesize silver nanoparticles (AgNPs) using green-one pot method. Some reaction variables ie. incubation time, Salacca zallacca extract concentration, and pH of the mixture of AgNO3 and the extract have been set-up and controlled. The AgNPs were characterized using UV-Vis, FTIR, XRD, and TEM methods. Testing the antibacterial activity of AgNPs was undertaken using the disk diffusion method by measuring the inhibition zones of Staphylococcus aureus and Salmonella typhi bacteria.The AgNPs can be prepared by reducing Ag+ using Salacca zalacca extract as reducing agent. The formation of AgNPs are affected by the incubation time, extract concentration, and pH of the solution. The AgNPs indicate SPR peak absorption at 400-530 nm, and centered cubic (fcc) structures with a particle size of 10 nm. The AgNPs show antibacterial activity against Staphylococcus aureus and Salmonella typhi bacteria.

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FAG Salmonella ASAL LIMBAH PASAR IKAN DAN AIR SUNGAI DI SEKITAR KAMPUS UNIVERSITAS BANGKA BELITUNG

EKOTONIA Jurnal Penelitian Biologi Botani Zoologi dan Mikrobiologi ◽

10.33019/ekotonia.v3i2.758 ◽

2019 ◽

Vol 3 (2) ◽

pp. 45-49

Author(s):

Rizky Putri Deshanda ◽

Rahmad Lingga ◽

Nur Annis Hidayati ◽

Eka Sari ◽

Rossy Hertati

Keyword(s):

Escherichia Coli ◽

Staphylococcus Aureus ◽

Host Range ◽

Incubation Time ◽

Plaque Morphology ◽

Broad Host Range ◽

Gram Negative ◽

Phage Isolate ◽

And Staphylococcus Aureus ◽

Campus Building

Seven Salmonella lytic phages found in water sample of river near UBB campus building. Phages were characterized by plaque morphology (plaque diameter size and shape) and phage host range. Phages formed plaques with diameter size ranges from 1.06 mm to 4.90 mm, and form shape such as small dot, circle, elongated, or irregular. Factors effect plaque forming by phages are phage titer number and incubation time. All phage isolates have broad host range include Gram negative and positive. Six phage isolates are able to lyse Salmonella, Staphylococcus aureus, and Escherichia coli, meanwhile one phage isolate is able to lyse Salmonella and Staphylococcus aureus.

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Factors influencing antibacterial activity of chitosan against Aeromonas hydrophila and Staphylococcus aureus

International Current Pharmaceutical Journal ◽

10.3329/icpj.v5i5.27316 ◽

2016 ◽

Vol 5 (5) ◽

pp. 45-48 ◽

Cited By ~ 7

Author(s):

Belgin Erdem ◽

Ergin Kariptas ◽

Tayfun Kaya ◽

Sener Tulumoglu ◽

Özkan Görgülü

Keyword(s):

Staphylococcus Aureus ◽

Antibacterial Activity ◽

Incubation Time ◽

Aeromonas Hydrophila ◽

Incubation Temperature ◽

Chitosan Solution ◽

Sodium Ions ◽

Food Borne ◽

Spoilage Bacteria ◽

And Staphylococcus Aureus

In this study, the effect of the incubation time, incubation temperature, pH, metal and sodium ions on the antibacterial activity of chitosan against food borne spoilage bacteria focused. Aeromonas hydrophila and Staphylococcus aureus were used as two food borne bacteria. Acetic acid was used dissolving of chitosan. Results showed that chitosan solution at 5 mg/mL significantly inhibited the growth of A. hydrophila and S. aureus in presence of time, pH and metal ions (p <0.01). However, temperature did not significantly affect the antibacterial activity (4°C, 25°C and 37°C) (p >0.01). Chitosan activity increased with increasing incubation time. The influence of below pH 6 on the antibacterial activity of chitosan was significantly influenced (p<0.01). The addition of Ba+2 reduced chitosan activity against A. hydrophila while the addition of Ca+2 have increased chitosan activity against S. aureus. Sodium ions at a concentration of 25 mM reduced chitosan activity against S. aureus. These results show that chitosan can be used food industry to prevent the development of spoilage bacteria. Erdem et al., International Current Pharmaceutical Journal, April 2016, 5(5): 45-48

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