scholarly journals Хар мод /larix sibirica ldb./-ны мөчрийн боомын нян /bacillus anthracis/-гийн эсрэг идэвхит нэгдлийн судалгаа

2017 ◽  
pp. 58-66
Author(s):  
Эрдэнэбаатар П ◽  
Батхүү Ж ◽  
Ганболд Д ◽  
Оюунцэцэг Ш ◽  
Отгонбаатар Д ◽  
...  
Keyword(s):  
Methanol Extract ◽  
13C Nmr Spectroscopy ◽  
Larix Sibirica ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Inhibition Activity ◽  
Disc Diffusion Method ◽  
Isopimaric Acid ◽  
Causal Pathogen ◽  
Potential Activity

No Mongolian AbstractThe methanol extract and its water nonsoluble fraction of the stem of Larix sibirica Ldb. exhibited a good inhibition activity against M.luteus strain and anthrax causal pathogen B.anthracis 90, 120, 147, 178 by the disc diffusion method. Activity-guided isolation of the water nonsoluble resin fraction led to the isolation of isopimaric acid which molecular structure was determined by 1H, 13C NMR spectroscopy and MS methods. Isopimaric acid exhibited a potential activity against M.luteus bacterial strain (9.5 mm) and B.anthracis 90 –17 mm, 120–15 mm, 147–15 mm, 178–17 mm, respectively.

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 Antibacterial Activity of Environmentally Sustainable Polyurethane Based Composites from Castor Oil

2021 ◽  
Vol 37 (3) ◽  
pp. 755-758
Author(s):  
D. Jeba ◽  
K. R. Sheeja
Keyword(s):  
Streptococcus Mutans ◽  
Castor Oil ◽  
Bacterial Pathogens ◽  
Diffusion Method ◽  
Medical Applications ◽  
Disc Diffusion ◽  
Zone Of Inhibition ◽  
Disc Diffusion Method ◽  
Environmentally Sustainable ◽  
Potential Activity

In this present work, soft and hard antibacterial polyurethane sheets of different composition have been synthesized from castor oil based polyurethane and which was reinforced with natural and synthetic fibres such as jute, sisal, hemp and glass. The activity of polyurethane sheets and selected antibiotics was evaluated against four bacterial pathogens including Staphylococcusaureus, Streptococcus mutans, E.coli, Pseudomonas aeruginosausing modified disc diffusion method. Among the ten samples, hard polyurethanes displayed potential activity against bacterial pathogens E.coli and Streptococcus mutans. Polyurethane sheets showed the highest activity against E.coli which is comparable with zone of inhibition exhibited by streptomycin. Further studies are needed to improve the polyurethane sheets for medical applications.

scholarly journals Antimicrobial Activities of Essential Oil and Methanol Extract ofTeucrium montanum

2007 ◽  
Vol 4 (s1) ◽  
pp. 17-20 ◽  
Author(s):  
Nenad Vukovic ◽  
Tanja Milosevic ◽  
Slobodan Sukdolak ◽  
Slavica Solujic
Keyword(s):  
Essential Oil ◽  
Methanol Extract ◽  
Antimicrobial Activities ◽  
Fungal Species ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Inhibitory Effects ◽  
Disc Diffusion Method ◽  
Antifungal Effect

This study was designed to examine the chemical composition of essential oil and thein vitroantimicrobial activities of essential oil and methanol extract ofTeucrium montanum. The inhibitory effects of essential oil and methanol extracts ofT. montanumwere tested against 13 bacterial and three fungal species by using disc-diffusion method. GC/MS analyses revealed that essential oil contains mainly δ-cadinene (17.19%), β-selinene (8.16%) α-calacorene (4.97%), 1,6-dimethyl-4-(1-methylethyl)-naphthalene (4.91%), caryophyllene (4.35%), copaene (4.23%), torreyol (3.91%), 4-terpineol (3.90%), cadina-1,4-diene (3.39%), β-sesquiphellandrene (3.34%), τ-cadinol (3.12%) and γ-curcumene (3.18%). The essential oil has antibacterial as well as antifungal effect.

scholarly journals AKTIVITAS ANTIBAKTERI EKSTRAK METANOL Acalypha hispida TERHADAP BAKTERI Shigella flexneri DAN Bacillus cereus IHB B 379

2020 ◽  
Vol 10 (2) ◽  
Author(s):  
Elvi Rusmiyanto P. Wardoyo ◽  
Devinda Ekarizky Diputri ◽  
Rikhsan Kurniatuhadi
Keyword(s):  
Antibacterial Activity ◽  
Bacillus Cereus ◽  
Methanol Extract ◽  
Shigella Flexneri ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Disc Diffusion Method ◽  
Extract Concentration ◽  
Activity Test ◽  
Antibacterial Potential

AbstractAcalpha hispida flower commonly used as traditional medicine. The antibacterial potential of the A. hispida flower can be used to treat diarrhea and cancer. The purpose of this study was to determine the antibacterial activity and effective concentration of methanol extract of A. hispida flower against to S. flexneri and B. cereus. Sample used was flower of A. hispida from Kota Pontianak. The solvent used is metahnol. Antibacterial activity test using the disc diffusion method (Kirby-Bauer) with parameters based on grading levels  extract concentration in S. flexneri was 1.2;  1.3;  1.4;  1.5;  and 1.6 g/ml and B. cereus for 0.75;  0.80;  0.85;  0.90;  and 0.95 g/mL, 10% DMSO and ciprofloaxin as a comparison. the results of the research showed that the concentration of methanol extract of A. hispida flower which can effectively inhibit the growth of S. flexneri and B. cereus bacteria at 1.2 g / mL and 0.75 g / mL. The methanol extract of A. hispida flower contains compounds of alkaloids, flavonoids, tannins, phenols, steroids and terpenoids.Keywords : Acalypha hispida, Antibacterial, Shigella flexneri, Bacillus cereus AbstrakAcalypha hispida merupakan tanaman obat trardisional yang sudah dimanfaatkan masyarakat secara turun temurun untuk mengobati diare dan kanker. Tujuan penelitian ini adalah untuk mengetahui aktivitas antibakteri dan konsentrasi efektif ekstrak metanol bunga A. hispida terhadap bakteri Shigella flexneri dan Bacillus cereus. Sampel penelitian yang digunakan adalah bunga A. hispida yang diperoleh dari Kota Pontianak. Pelarut yang digunakan adalah methanol. Uji aktivitas antibakteri menggunakan metode difusi cakram (Kirby-Bauer) dengan perlakuan 5 taraf konsentrasi ekstrak pada bakteri S. flexneri sebesar 1,2; 1,3; 1,4; 1,5; dan 1,6 g/ml serta pada bakteri B. cereus IHB B 379 sebesar 0,75; 0,80; 0,85; 0,90; dan 0,95 g/mL, DMSO 10% serta sebagai pembanding digunakan ciprofloaxin. Hasil penelitian menunjukkan bahwa konsentrasi ekstrak methanol bunga A. hispida yang secara efektif dapat menghambat pertumbuhan bakteri S. flexneri dan B. cereus sebesar 1,2 g/mL dan 0,75 g/mL. Ekstrak methanol bunga A. hispida mengandung senyawa golongan alkaloid, flavonoid, tannin, fenol, steroid dan terpenoid.Kata kunci: Acalypha hispida, antibakteri, Shigella flexneri, Bacillus cereus

scholarly journals CRUDE EXTRACTS OF MAGNOLIA ALBA FLOWERS USING N-HEXANE AND METHANOL SOLVENTS AND THEIR ANTI-ACNE POTENTIAL

2021 ◽  
Vol 10 (6) ◽  
pp. 3789-3793
Author(s):  
Sofia Munira
Keyword(s):  
Propionibacterium Acnes ◽  
Methanol Extract ◽  
Antibacterial Properties ◽  
Inhibition Zone ◽  
Positive Control ◽  
Hexane Extract ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Disc Diffusion Method ◽  
Bacterial Inhibition

This study aimed to test the antibacterial activity of n-hexane and methanol extracts of white cempaka flowers (Magnolia alba) against Propionibacterium acnes bacteria. The extract was obtained by using the maceration method for 72 hours. Each extract was tested for its antibacterial properties using the disc diffusion method with the variant concentration of the extract used was 0.05%; 2%; 4%; 6%; and 8%. The results showed that the methanol extract had a higher inhibition zone than the n-hexane extract. In n-hexane extract, the lowest concentration of 0.05% showed an inhibition zone of 6.6 mm and the highest concentration of 8% had an inhibition zone of 9.6 mm. Whereas in methanol extract, the inhibition zone obtained was 7.3 mm at a low concentration of 0.05%, but at the highest concentration of 8% the inhibition zone obtained was 11.6 mm. The effect of extract concentration on the diameter of the inhibition zone formed is very significant (directly proportional), where the higher the concentration used, the larger the diameter of the inhibition zone produced. Antibacterial testing for both extracts showed a weak (< 10 mm) to moderate (> 10 mm) bacterial inhibition, which was similar with the inhibition zone obtained from the positive control (11-11.3 mm; moderate bacterial inhibition).

scholarly journals The chemical composition of the essential oil and the antibacterial activities of the essential oil and methanol extract of Teucrium montanum

2008 ◽  
Vol 73 (3) ◽  
pp. 299-305 ◽  
Author(s):  
Nenad Vukovic ◽  
Tanja Milosevic ◽  
Slobodan Sukdolak ◽  
Slavica Solujic
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Methanol Extract ◽  
Bacterial Species ◽  
Antibacterial Activities ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Inhibitory Effects ◽  
Disc Diffusion Method

This study was designed to examine the chemical composition of the essential oil and the in vitro antibacterial activities of the essential oil and methanol extract of Teucrium montanum. The inhibitory effects of the essential oil and the methanol extracts of Teucrium montanum were tested against thirteen bacterial species using the disc-diffusion method. GC/MS analyses revealed that the essential oil contained mainly sesquiterpenes, such as ?-cadinene (17.19 %), ?-selinene (8.16 %) and ?-calacorene (4.97 %). The highest activities were obtained with the essential oil of Teucrium montanum against K. pneumoniae, B. subtilis, B. mycoides, E. cloaceae and A. chlorococcum. In addition, comparison of the antibacterial activities of the essential oil and the methanol extract showed that the essential oil exhibited the stronger antibacterial activities.

scholarly journals The Initial Antibacterial Activity Tests of Pliek U Oil and Pliek U: an Acehnese Traditional Food

2008 ◽  
Vol 2 (2) ◽  
Author(s):  
Nurliana Nurliana ◽  
Mirnawati Sudarwanto ◽  
Lisdar I. Sudirman ◽  
A. W. Sanjaya
Keyword(s):  
Escherichia Coli ◽  
Antibacterial Activity ◽  
Methanol Extract ◽  
Diffusion Method ◽  
Traditional Food ◽  
Disc Diffusion ◽  
Disc Diffusion Method ◽  
Agar Disc ◽  
Inhibition Zones ◽  
Initial Research

This initial research was intended to detect antibacterial activity of pliek u oil and pliek u. Pliek u oil consist of minyeuk simplah (MS) and minyeuk brok (MB), Pliek u consist of two kinds of solid waste namely wet pliek u (Ap1) and dry pliek u (Ap2). Pliek u was methanol extracted at concentration 10% (w/v). Pliek u oil and methanol extract of pliek u were evaluated for their antibacterial activity, against Bacillus subtilis and four strains of Enterophatogenic Escherichia coli (EPEC) employing agar disc diffusion method. No antibacterial activity was shown by MS. The MB exhibited a little effect 1-2 mm against bacterial tests. The results demonstrated that the higher antibacterial activity was shown by dry pliek u compare with wet pliek u with the inhibition zones from 6.67-10.33 mm and 6.00-7.33 mm respectively.

scholarly journals Control of Clinical Pathogens by the Haemolymph of Paratelphusa hydrodromous, a Freshwater Crab

2011 ◽  
Vol 2011 ◽  
pp. 1-4 ◽  
Author(s):  
A. Arul Prakash ◽  
S. Balasubramanian ◽  
G. Gunasekaran ◽  
M. Prakash ◽  
P. Senthil Raja
Keyword(s):  
Bacterial Species ◽  
Diffusion Method ◽  
Klebsiella Pneumonia ◽  
Disc Diffusion ◽  
Freshwater Crab ◽  
Disc Diffusion Method ◽  
Strong Response ◽  
Clinical Pathogens ◽  
Rhizopus Sp ◽  
Antimicrobial Assay

In the present study, effort has been made to find the antimicrobial activity of haemolymph collected from freshwater crab, Paratelphusa hydrodromous. The haemolymph collected was tested for antimicrobial assay by disc diffusion method against clinical pathogens. Five bacterial species, namely, Escherichia coli, Klebsiella pneumonia, Proteus mirabilis, Pseudomonas aeruginosa, Staphylococcus aureus, and five fungal strains, namely and Aspergillus flavus, Aspergillus fumigatus, Aspergillus niger, Rhizopus sp., and Mucor sp., were selected for the study. The result shows a strong response of haemolymph against the clinical pathogens which confirms the immune mechanism of the freshwater crab.

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