scholarly journals Intracellular Biosynthesis and Antibacterial Activity of Silver Nanoparticles Using Edible Mushrooms

2012 ◽  
Vol 4 (4) ◽  
pp. 55-61 ◽  
Author(s):  
Sankaran MIRUNALINI ◽  
Vadivel ARULMOZHI ◽  
Krishnamoorthy DEEPALAKSHMI ◽  
Mani KRISHNAVENI
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Antibacterial Agent ◽  
Cost Effective ◽  
Edible Mushroom ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Disc Diffusion Method ◽  
Gram Positive Bacteria ◽  
Mushroom Extracts

The process of biosynthesis of silver nanoparticles is a simple, cost effective and eco-friendly approach. Biosynthesis of silver nanoparticles using some commonly available edible mushroom extracts and their antimicrobial activity was demonstrated in the current study. The formation of silver nanoparticles was confirmed by UV, FTIR and SEM and antibacterial activity was tested using disc diffusion method. From the results it is confirmed the successful formation of silver nanoparticles using mushroom extracts; they performed their role as a reducing and capping agent and also exhibited a potent antibacterial activity against S. aureus (gram positive bacteria). Thus the biosynthesis of silver nanoparticles using edible mushroom extract will deserve to be a good candidate as an antibacterial agent.

scholarly journals A Study on Antibacterial Activity of Silver Nanoparticles

2018 ◽  
Vol 29 (2) ◽  
pp. 37-41
Author(s):  
M Iqbal Hossain ◽  
M Anwar Habib ◽  
Nazimuddin Ahmed
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Antibacterial Effect ◽  
Diffusion Method ◽  
Gram Negative Bacteria ◽  
Disc Diffusion ◽  
Disc Diffusion Method ◽  
Reference Drug ◽  
Gram Negative ◽  
Quasi Experimental

This quasi experimental study was designed to evaluate antibacterial activity of chemically synthesized silver nanoparticles (AgNPs) from silver nitrate (AgNO3) solutions on gram negative bacteria like E.Coli using disc diffusion method. Different concentrations of AgNPs, AgNO3 and reference drug ciprofloxacin were used to find out the antibacterial activity which revealed that AgNPs possessed significant antibacterial effect compared to AgNO3 solutions but relatively less antibacterial effect than that of ciprofloxacin. So chemical synthesis guided AgNPs may have some antibacterial effects.TAJ 2016; 29(2): 37-41

scholarly journals Antibacterial Activity of Silver Nanoparticles Synthesized by Bark Extract of Syzygium cumini

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Ram Prasad ◽  
Vyshnava Satyanarayana Swamy
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Cost Effective ◽  
Diffusion Method ◽  
Bark Extract ◽  
Force Microscopy ◽  
Atomic Force ◽  
Cost Effective Method ◽  
Uv Visible ◽  
Major Attention

The unique property of the silver nanoparticles having the antimicrobial activity drags the major attention towards the present nanotechnology. The environmentally nontoxic, ecofriendly, and cost-effective method that has been developed for the synthesis of silver nanoparticles using plant extracts creates the major research interest in the field of nanobiotechnology. The synthesized silver nanoparticles have been characterized by the UV-visible spectroscopy, atomic force microscopy (AFM), and scanning electron microscopy (SEM). Further, the antibacterial activity of silver nanoparticles was evaluated by well diffusion method, and it was found that the biogenic silver nanoparticles have antibacterial activity against Escherichia coli (ATCC 25922), Staphylococcus aureus (ATCC 29213), Pseudomonas aeruginosa (ATCC 27853), Azotobacter chroococcum WR 9, and Bacillus licheniformis (MTCC 9555).

scholarly journals Antibacterial Activity of Leaf Extracts ofBaeckea frutescensagainst Methicillin-ResistantStaphylococcus aureus

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Somayeh Razmavar ◽  
Mahmood Ameen Abdulla ◽  
Salmah Binti Ismail ◽  
Pouya Hassandarvish
Keyword(s):  
Antibacterial Activity ◽  
Ethanol Extract ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Phytochemical Screening ◽  
Bioactive Constituents ◽  
Disc Diffusion Method ◽  
Leaf Extracts ◽  
Baeckea Frutescens ◽  
High Degree

This study was based on screening antibacterial activity of the ethanol extract ofBaeckea frutescensL. against MRSA clinical isolates, analyzes the potential antibacterial compound, and assesses the cytotoxicity effect of the extract in tissue culture. Leaves ofBaeckea frutescensL. were shade dried, powdered, and extracted using solvent ethanol. Preliminary phytochemical screening of the crude extracts revealed the presence of alkaloids, flavonoids, steroids, terpenoids, phenols, and carbohydrates. The presence of these bioactive constituents is related to the antibacterial activity of the plant. Disc diffusion method revealed a high degree of activity against microorganisms. The results confirm thatBaeckea frutescensL. can be used as a source of drugs to fight infections caused by susceptible bacteria.

scholarly journals Green Synthesis of Silver Nanoparticles from the Extracts of Fruit Peel of Citrus tangerina, Citrus sinensis, and Citrus limon for Antibacterial Activities

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Moira Carmalita Dharsika Niluxsshun ◽  
Koneswaran Masilamani ◽  
Umaramani Mathiventhan
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Citrus Sinensis ◽  
Orange Peel ◽  
Cost Effective ◽  
Diffusion Method ◽  
Citrus Limon ◽  
Fruit Peel ◽  
Visible Absorption ◽  
Uv Visible

Wide application of nanoparticles motivates the need for synthesising them. Here, a nontoxic, eco-friendly, and cost-effective method has been established for the synthesis of silver nanoparticles using extracts of lemon peel (Citrus limon), green orange peel (Citrus sinensis), and orange peel (Citrus tangerina). The synthesised nanoparticles have been characterised using UV-visible absorptionspectroscopy, Fourier transform infrared spectroscopy, and transmission electron microscopy (TEM). The UV-visible absorption spectrum of these synthesised silver nanoparticles shows an absorption peak at around 440 nm. TEM images show different shaped particles with various sizes. Furthermore, the antibacterial activity of silver nanoparticles was appraised by a well-diffusion method and it was observed that the green synthesised silver nanoparticles have an effective antibacterial activity against Escherichia coli and Staphylococcus aureus. The outcome of this study could be beneficial for nanotechnology-based biomedical applications.

scholarly journals EVALUATION OF ANTIBACTERIAL ACTIVITY OF A CYANOBACTERIUM SCYTONEMA SCHMIDTII GOM

2021 ◽  
pp. 77-79
Author(s):  
Janardhan Namdeo Nehul
Keyword(s):  
Escherichia Coli ◽  
Antibacterial Activity ◽  
Methanol Extract ◽  
Axenic Culture ◽  
Soil Samples ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Zone Of Inhibition ◽  
Disc Diffusion Method ◽  
Air Blower

Scytonema schmidtii,a cyanobacterium was isolated from the collected soil samples from different locations of Ahmednagar district of Maharashtra state (India). Identification was carried out using morphological variation and taxonomical approaches according to Desikachary (1959) and Prescott (1962) .The axenic culture of Scytonema schmidtii was obtained by using the method recommended by Bolch and Blackburn (1996). The isolated Scytonema schmidtii was grown autotropically in BG-11 medium as described by Rippka et al.,(1979) and incubated at 30±2°c.After 25 days, biomass was harvested by filtration through double layered muslin cloth and dried using air blower. The biomass of this Scytonema schmidtii species was used for the assessment of antibacterial activity against Escherichia coli, Bacillus subtilis, Staphylococcus aureus, Pseudomonas aeruginosa, Micrococcus flavus and Proteus mirabilis. The antibacterial activity was studied by disc diffusion method (Anonymous,1996).Methanol extract of Scytonema schmidtii showed the activity against all the tested bacterial strains.Maximum zone of inhibition (23±1.9 mm) was recorded with methanol extract of Scytonema schmidtii.

scholarly journals Synthesis of a New Conjugates of Imidazole wih Beta Lactam Moiety and Evaluation of its Expanded Antibacterial Activity

2018 ◽  
Vol 34 (5) ◽  
pp. 2495-2501 ◽  
Author(s):  
Sarmd D. Noori ◽  
Mazin N. Mousa ◽  
Shaker A. N. Al-Jadaan
Keyword(s):  
Antibacterial Activity ◽  
Chemical Structure ◽  
Bacterial Species ◽  
Anaerobic Bacteria ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Beta Lactam ◽  
Disc Diffusion Method ◽  
E Coli ◽  
Ft Ir

Five compounds containing (2,4,5-triphenyl triphenyl-1H-) and azetidinone (beta-lactam) moiety were synthesized. The physical data and yield of synthesized compounds were recorded, the chemical structure of prepared compounds were characterized using FT-IR, 1H-NMR and elemental analysis. The antibacterial activity was evaluated using disc diffusion method that involve tow Gram positive (staph. aureus, E. Faecalis), two Gram negative (E. coli and ‎K. pneumoniae), and one anaerobic bacteria (streptococcus. Pyogen). Different concentration of the prepared compounds has been used, and the obtained result were compared with standard (ceftazidime). Compound (5c) showed the best antibacterial activity against all bacterial species while 5a and 5e does not. Other compounds showed activity against some species.

scholarly journals Chemical Composition and Antibacterial Activity of Essential Oil of Anvillea radiata Coss. & Dur

2007 ◽  
Vol 2 (5) ◽  
pp. 1934578X0700200
Author(s):  
Fadwa El Hanbali ◽  
Ahmed El Hakmaoui ◽  
Fouad Mellouki ◽  
Lahoussine El Rhaffari ◽  
Mohamed Akssira
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Chemical Composition ◽  
Essential Oil ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Disc Diffusion Method ◽  
Aerial Parts

The essential oil of the aerial parts of Anvillea radiata Coss. & Dur. was examined by GC-MS. Twenty-nine constituents were identified, representing 88.8% of the total. 6-Oxocyclonerolidol (66.6%) and 6-hydroxycyclonerolidol (11.4%) were found to be the major components. The disc diffusion method, used for antimicrobial activity testing, showed that the essential oil had a significant antibacterial activity against all tested microorganisms.

ANTIOXIDANT AND ANTIBACTERIAL ACTIVITIES OF RUTA ANGUSTIFOLIA EXTRACT

2015 ◽  
Vol 77 (25) ◽  
Author(s):  
Nur Azfa Shuib ◽  
Anwar Iqbal ◽  
Fatimatul Akmal Sulaiman ◽  
Izzatie Razak ◽  
Deny Susanti
Keyword(s):  
Antibacterial Activity ◽  
Phenolic Content ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Diffusion Method ◽  
Total Phenolic ◽  
Disc Diffusion ◽  
Flavonoid Content ◽  
Disc Diffusion Method ◽  
Polyphenolic Content

Ruta angustifolia was used in this study in order to evaluate the antimicrobial activity and antioxidant properties and its correlation with the polyphenolic content. Two Gram-positive bacteria (Staphylococcus aureus ATCC 25923, Bacillus cereus ATCC 11778) and two Gram–negative bacteria (Pseudomonas aeruginosa ATCC 27853, Escherichia coli ATCC 8739) were used to determine the antibacterial activity. Aqueous maceration extract was used for antioxidant activities and methanolic maceration extract was used for antibacterial activity. The antioxidant properties and activities were evaluated by using total phenolic content (TPC), total flavonoid content (TFC), DPPH free radical scavenging activity and beta-carotene bleaching method. Whereas, the antibacterial activity was examined using disc diffusion method against selected microorganism at concentration 1.0 mg/disc. The results showed the phenolic content of R. angustifolia extract was 18.89 g GAE/100 g extract while the flavonoid content was 14.170 g QE/100 g extract. R. angustifolia exhibited good radical scavenging with IC50 value of 2.04 mg/ml. The result for disc diffusion method showed no inhibition zone against all the strains of bacteria at 1.0 mg/disc concentration of the extract. Based on the results, it can be concluded that the R. angustifolia aqueous extract has the antioxidant properties and there is correlation between polyphenolic content of the extract with its antioxidant activity. However, R. angustifolia methanolic extract did not show any antibacterial activity.

scholarly journals Synthesis and in vitro antibacterial activity of Cephradine Benzoate

1970 ◽  
Vol 10 (3) ◽  
pp. 148-151
Author(s):  
M Ahmad ◽  
M Rahman ◽  
P Kumar Paul
Keyword(s):  
Antibacterial Activity ◽  
Salmonella Typhi ◽  
Shigella Dysenteriae ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Disc Diffusion Method ◽  
Nmr Studies ◽  
Shigella Boydii ◽  
Group B

Aims & Methods: The present study was undertaken to compare the antibacterial activity of a cephradine derivative with that of the parent antibiotic cephradine. Cephradine was converted to its benzoyl derivative by Schotten-Baumann method for the first time. Disc diffusion method was employed to find out the antibacterial activity against EPEC, ETEC, E. Agg, Salmonella typhi, Salmonella group B, Shigella boydii, Shigella dysenteriae 1, Shigella dysenteriae 2, Shigella flexinariae and Shigella sonnei. Melting point, TLC, HPLC, UV, FTIR and <sup>1</sup>H NMR studies were carried out to check the purity and confirm that the derivative was cephradine benzoate. Results: The benzoyl derivative showed promising activity against tested bacteria. The results obtained from the study demonstrate that the benzoyl derivative could be a potential antibacterial agent. Key words: Cephradine benzoate, antibacterial activity, disc diffusion method.   DOI: http://dx.doi.org/ 10.3329/bjms.v10i3.8356 BJMS 2011; 10(3): 148-151

Sign in / Sign up

Export Citation Format

Share Document