scholarly journals Antibacterial Screening of Mangrove Extract Library Showed Potential Activity against Escherichia coli and Staphylococcus aureus

2020 ◽  
Vol 10 (2) ◽  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antibacterial Screening ◽  
Potential Activity ◽  
And Staphylococcus Aureus

scholarly journals ISOLASI BAKTERI YANG BERSIMBION DENGAN ASCIDIAN Herdmania momus YANG MEMILIKI AKTIVITAS ANTIBAKTERI

2020 ◽  
Vol 8 (2) ◽  
pp. 20
Author(s):  
Silvia E Koyongian ◽  
Deiske A Sumilat ◽  
Rosita A J Lintang ◽  
Stenly Wullur ◽  
Sandra O Tilaar ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Marine Invertebrates ◽  
Nutrient Agar ◽  
Symbiotic Bacteria ◽  
Bacterial Isolates ◽  
Marine Broth ◽  
Antibacterial Screening ◽  
Coral Reef Ecosystems ◽  
And Staphylococcus Aureus

 Ascidian is marine invertebrates in coral reef ecosystems that produce many bioactive compounds for pharmacology. The presence of symbiotic bacteria with marine organisms is protected the host biota by producing secondary metabolites. The purpose of this study is to obtain symbiotic bacterial isolates with Herdmania momus ascidian, then to observe the antibacterial activity of these bacterial isolates against Escherichia coli, and Staphylococcus aureus. Isolation and culture of the symbiotic bacteria were made on Nutrient Agar and Zobell Marine Broth media. The antibacterial screening showed that the Herdmania momus symbiotic bacteria were able to inhibit the growth of Staphylococcus aureus and Escherichia coli.Keywords: ascidians, Herdmania momus, bacteria, isolation, antibacterialAbstak          Ascidian adalah avetebrata laut di ekosistem terumbu karang yang banyak menghasilkan senyawa bioaktif untuk bidang farmakologi. Keberadaan bakteri yang bersimbion dengan organisme laut pada umumnya untuk melindungi biota yang ditumpanginya dan dirinya dengan cara menghasilkan senyawa metabolit sekunder. Tujuan dari penelitian ini yaitu untuk mendapatkan isolat bakteri yang bersimbion dengan ascidian Herdmania momus, kemudian mengamati aktivitas antibakteri dari isolat bakteri tersebut terhadap Escherichia coli, dan Staphylococcus aureus. Isolasi dan kultur bakteri yang bersimbion dengan ascidian dibuat pada media Nutrient Agar dan Zobell Marine Broth. Skrining aktivitas antibakteri menunjukkan isolat bakteri yang bersimbion dengan ascidian Herdmania momus mampu menghambat pertumbuhan organisme uji Staphylococcus aureus dan Escherichia coli.Kata kunci: ascidian, Herdmania momus, bakteri, isolasi, antibakteri

Study on Propolis Quality from China and Uruguay

2000 ◽  
Vol 55 (9-10) ◽  
pp. 778-784 ◽  
Author(s):  
Josep Serra Bonvehí ◽  
Francesc Ventura Coll
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Bacillus Subtilis ◽  
Biological Activities ◽  
The State ◽  
Active Components ◽  
E Coli ◽  
Geographic Origins ◽  
Potential Activity ◽  
And Staphylococcus Aureus

Abstract The composition, bacteriostatic and ROO• -scavenging potential activities of fifteen propolis samples from various botanic and geographic origins were determined to obtain objective information related to propolis quality. Variance analysis showed significant differences (p ≤ 0.05) in the contents of polyphenols, flavonoids and active components between fresh and aged propolis. The state of the product (fresh or aged) could be differentiate by using flavonoid pattern and biological activities. A minimum propolis concentration of 80 μg/ml was required inhibit Bacillus subtilis and Staphylococcus aureus while 800 μg/ml was required to inhibit Escherichia coli using fresh propolis. Aged propolis inhibit B. subtilis and S. aureus at concentration of 100 μg/ml and E. coli at 1000 μg/ml. A minimum flavonoids percentage of 18 g/100 g and a maximum ROO• -scavenging potential activity of 4.3 μg/ml were determined in fresh propolis. Flavonoids levels in aged propolis were approximately 20% lower than in fresh propolis. A maximum flavonoids percentage of 19.8 g/100 g and a ROO•-scavenging potential activity between 5.7 to 6.4 μg/ml in aged propolis were quantified. Another objective was to assess the use of ROO•-scavenging potential activity in propolis quality.

scholarly journals KARAKTERISASI DAN PENAPISAN AKTIVITAS ANTIBAKERI ISOLAT BAKTERI SIMBION Thurudilla lineolata DAN Phyllidiella pustulosa

2020 ◽  
Vol 8 (3) ◽  
pp. 27
Author(s):  
Kevien Marthin Doringin ◽  
Rosita AJ Lintang ◽  
Deiske A Sumilat
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Bioactive Compounds ◽  
Bacterial Isolate ◽  
Nutrient Agar ◽  
Antibacterial Screening ◽  
And Staphylococcus Aureus

Nudibranch are part of a class og Gastropods that do not have a shell and has a bright and striking colour. Nudibranch has different of bacteria and bioactive compounds contained therein for protect theselves from predators.The aim of this study were to isolate symbiotic bacterial drived from Thurudilla lineolata and Phyllidiella pustulosa, and to observe the antibacterial activity of bacterial isolate against Escherichia coli and Staphylococcus aureus. Isolation and culture of the symbiotic bacterial were made on Nutrient Agar. The antibacterial screening showed that Thrudilla lineolata and Phyllidiella pustulosasymbiotic bacteria were able to inhibit the growth of against Escherichia coli and Staphylococcus aureus Nudibranch merupakan bagian dari kelas Gastropoda yang tidak memiliki cangkang dan memiliki warna cerah dan mencolok. Nudibranch memiliki berbagai jenis bakteri dan senyawa bioaktif yang terkandung di dalamnya untuk melidungi diri dari predator. Tujuan dari penelitian ini yaitu untuk mendapatkan isolat bakteri yang bersimbion dengan Thrudilla lineolata dan Phyllidiella pustulosa, kemudian mengamati aktivitas antibakteri dari isolat bakteri tersebut terhadap Escherichia coli, dan Staphylococcus aureus. Isolasi dan kultur bakteri yang bersimbion dengan Thrudilla lineolata dan Phyllidiella pustulosa, dibuat pada media Nutrient Agar. Skrining aktivitas antibakteri menunjukkan isolat bakteri yang bersimbion dengan Thrudilla lineolata dan Phyllidiella pustulosa mampu menghambat pertumbuhan organisme uji Staphylococcus aureus dan Escherichia coli. Kata kunci: Nudibranch, Thrudilla lineolata, Phyllidiella pustulosa, bakteri, isolasi, antibakter

Comparison of the Effects of Silver in Nanostructured and Ultrahigh Diluted Form on Growth and Volatile Compounds Produced by Escherichia coli and Staphylococcus aureus

2020 ◽  
Vol 10 (3) ◽  
pp. 316-329
Author(s):  
Fateme Mirzajani ◽  
Amin Hamidi
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Life Cycles ◽  
Gas Chromatography Mass Spectrometry ◽  
Untreated Sample ◽  
E Coli ◽  
Volatile Metabolites ◽  
Octyl Acetate ◽  
Volatile Organic ◽  
And Staphylococcus Aureus

Introduction: In this project, the growth and volatile metabolites profiles of Escherichia coli (E. coli ) and Staphylococcus aureus were monitored under the influence of silver base chemical, nanoparticle and ultra-highly diluted compounds. Materials & Methods: The treatments were done for 12000 life cycles using silver nanoparticles (AgNPs) as well as ultra-highly diluted Argentum nitricum (Arg-n). Volatile organic metabolites analysis was performed using gas chromatography mass spectrometry (GC-MS). The results indicated that AgNPs treatment made the bacteria resistant and adapted to growth in the nanoparticle condition. The use of ultra-highly diluted Arg-n initially increased growth but it decreased later. Also, with the continuous usage of these materials, no more bacterial growth was observed. Results: The most important compounds produced by E. coli are Acetophenone, Octyl acetate, Styrene, 1,8-cineole, 4-t-butyl-2-(1-methyl-2-nitroethyl)cyclohexane, hexadecane and 2-Undecanol. The main compounds derived from S. aureus are Acetophenone,1,8-cineole, Benzaldehyde, 2-Hexan-1-ol, Tridecanol, Dimethyl Octenal and tetradecane. Acetophenone and 1,8-cineole were common and produced by both organisms. Conclusion: Based on the origin of the produced volatiles, main volatiles percentage of untreated sample is hydrocarbon (>50%), while bacteria treatments convert the ratio in to aldehydes, ketones and alcohols in the case of AgNPs, (>80%) and aldehydes, ketones and terpenes in the case of Arg-n (>70%).

Penggunaan Limbah Logam Tembaga yang Didaur Ulang untuk Antibakteri dan Degradasi Metil Merah Secara Fotolisis

2019 ◽  
Vol 4 (1) ◽  
pp. 15
Author(s):  
Ariyetti Ariyetti ◽  
Muhammad Nasir ◽  
Safni Safni ◽  
Syukri Darajat
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Silver Nitrate ◽  
Copper Sulfate ◽  
Bacterial Growth ◽  
Methyl Red ◽  
Copper Metal ◽  
Sulfate Hydrate ◽  
Red Dye ◽  
And Staphylococcus Aureus

<p><em>Metil merah merupakan salah satu zat warna golongan azo yang sering digunakan dalam industri dan laboratorium. Penggunaan metil merah dapat menimbulkan efek terhadap kesehatan dan lingkungan. Oleh sebab itu dilakukan metode fotodegradasi dengan menggunakan semikonduktor dan radiasi sinar tampak. Semikonduktor yang digunakan yaitu berbahan dasar tembaga sulfat hidrat dan perak nitrat. Prekusor tembaga sulfat hidrat dibuat dari pengolahan limbah logam tembaga hasil pemotongan tembaga yang ada di bengkel Lembaga Ilmu Pengetahuan Indonesia (LIPI) Bandung. Bahan semikonduktor juga memiliki kemampuan dalam menghambat pertumbuhan bakteri. Hasil optimum yang didapatkan dalam proses fotodegradasi dan antibakteri merupakan gabungan antara kedua prekusor tembaga sulfat hidrat dan perak nitrat dengan bantuan penyinaran. Kemampuan dalam menghambat pertumbuhan bakteri didapatkan persentase kematian 100 % untuk masing-masing bakteri, yaitu Escherichia coli dan Staphylococcus aureus. Aktifitas fotokatalitiknya dengan konsentrasi semikonduktor 10 ppm untuk mendegradasi zat warna metil merah 5 ppm, selama 23 jam, dimana persentase degradasi yang didapatkan dengan penyinaran lebih tinggi dibandingkan dengan tanpa penyinaran. Pengaruh pH larutan terhadap degradasi metil merah yaitu optimum pada pH 12 (basa).</em></p><p><em><br /></em></p><p><em>Methyl red is one of the azo group dyes that is often used in industry and laboratories. The use of methyl red can have an effect on health and the environment. Therefore photodegradation method is done by using semiconductor and visible light radiation. The semiconductor used is based on copper sulfate hydrate and silver nitrate. The copper sulphate hydrate precursor is made from the processing of copper-cut copper metal waste in the workshop of the Indonesian Institute of Sciences (LIPI) in Bandung. Semiconductor materials also have the ability to inhibit bacterial growth. The optimum results obtained in the photodegradation and antibacterial process are a combination of both copper sulfate hydrate precursor and silver nitrate with the help of irradiation. The ability to inhibit bacterial growth obtained 100% mortality for each bacterium, namely Escherichia coli and Staphylococcus aureus. Photocatalytic activity with 10 ppm semiconductor concentration to degrade methyl red dye 5 ppm, for 23 hours, where the percentage of degradation obtained by irradiation is higher than without irradiation. The effect of pH of the solution on the degradation of methyl red is optimum at pH 12 (base).</em></p>

scholarly journals Sulfaquinoxaline Oxidation and Toxicity Reduction by Photo-Fenton Process

2021 ◽  
Vol 18 (3) ◽  
pp. 1005
Author(s):  
Vanessa Ribeiro Urbano ◽  
Milena Guedes Maniero ◽  
José Roberto Guimarães ◽  
Luis J. del Valle ◽  
Montserrat Pérez-Moya
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pilot Plant ◽  
Environmental Water ◽  
Fenton Process ◽  
Experimental Conditions ◽  
Laboratory Bench ◽  
Degradation Rates ◽  
Bacterial Growth Inhibition ◽  
And Staphylococcus Aureus

Sulfaquinoxaline (SQX) has been detected in environmental water samples, where its side effects are still unknown. To the best of our knowledge, its oxidation by Fenton and photo-Fenton processes has not been previously reported. In this study, SQX oxidation, mineralization, and toxicity (Escherichia coli and Staphylococcus aureus bacteria) were evaluated at two different setups: laboratory bench (2 L) and pilot plant (15 L). The experimental design was used to assess the influence of the presence or absence of radiation source, as well as different H2O2 concentrations (94.1 to 261.9 mg L−1). The experimental conditions of both setups were: SQX = 25 mg L−1, Fe(II) = 10 mg L−1, pH 2.8 ± 0.1. Fenton and photo-Fenton were suitable for SQX oxidation and experiments resulted in higher SQX mineralization than reported in the literature. For both setups, the best process was the photo-Fenton (178.0 mg L−1 H2O2), for which over 90% of SQX was removed, over 50% mineralization, and bacterial growth inhibition less than 13%. In both set-ups, the presence or absence of radiation was equally important for sulfaquinoxaline oxidation; however, the degradation rates at the pilot plant were between two to four times higher than the obtained at the laboratory bench.

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