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    Wyświetlanie 1-8 z 8
    Tytuł:
    Evaluation of petroleum hydrocarbons adsorbtion and biodegradation by Pseudomonas aeruginosa cells entrapped into silica-alginate beads
    Autorzy:
    Mizielińska, Małgorzata
    Kowalska, Urszula
    Łopusiewicz, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1179265.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Pseudomonas aeruginosa
    biodegradation
    bioimmobilization
    encapsulation
    petroleum hydrocarbons
    Opis:
    The aim of the work was to elaborate new method of wool entrapping into silica alginate beads and checking of their adsorption properties. The purpose of the present study was also to determine water bioremediation efficiency using Pseudomonas aeruginosa cells immobilized into wool entrapped into silica-alginate beads. The results of study showed that obtained capsules are stable in saline water environment. Additionally neither silica adsorbers nor wool impacted negatively on viability of bacterial strains that were entrapped into these capsules. Moreover, it should be underline that 83,01% of adsorbed engine oil has been degraded by immobilized microorganisms after 3 months of biodegradation process. The results proved that properties and non-toxic character of these beads are suitable enough to use them in purification of water from petroleum hydrocarbons.
    Źródło:
    World Scientific News; 2017, 80; 256-267
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of Biosurfactant production by a novel Rhizobacterial Pseudomonas species
    Autorzy:
    Effiong, E.
    Agwa, O. K.
    Abu, G. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1046551.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Biosurfactant
    Gammaproteobacteria
    OVAT
    Optimization
    Proteobacteria
    Pseudomonas
    Quadratic functions
    Rhizobacteria
    Variables
    Opis:
    Optimization of biosurfactant has improved the value-chain, process development and cost of production associated with downstream synthesis. This study was designed to determine the optimal conditions for production of biosurfactant using hydrolyzed agroresidues under controlled conditions. Rhizobacterial isolate was obtained from Paspalum sp. growing on an aged crude oil impacted soil in Bodo, Rivers State, Nigeria. The bacterial isolates were identified using 16S rRNA molecular approach on a set of universal primers. One-Variable at a Time approach was applied for verification of pH, Carbon and nitrate sources respectively. Stat-ease Design-Expert version 12.0 was employed in the optimization of the variables while the operational conditions were fitted into a 20-run design matrix using α- level 2.0. Molecular identification confirmed the bacterial isolae to be Pseudomonas sp. with Accession number MH40927 with a gene molecular weight of 6.0kbp. Response for biomass, biosurfactant and Critical Miscelle Concentration (CMC) was observed to fit into a 2nd order Quadratic functions at p<0.05 with optimal conditions were pH = 7.0, Corn chaff = 2.0 g/L and Urea = 1.0 g/L. Biosurfactant = +51.98 + 6.79A + 4.30B 5.45C + 0.2975AB + 0.4975AC + 1.63BC-6.46A² - 3.51B² - 6.94C². This study further identified a directly proportional relationship between biosurfactant production and operational variables which represents a cheaper and feasible production roadmap for biosynthesis.
    Źródło:
    World Scientific News; 2019, 137; 18-30
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antibacterial activity of modified zinc oxide nanoparticles against Pseudomonas aeruginosa isolates of burn infections
    Autorzy:
    Aysa, Noor Hadi
    Salman, Halah Dawood
    Powiązania:
    https://bibliotekanauki.pl/articles/1191368.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Antimicrobial activity
    Pseudomonas aeruginosa
    ZnO
    burn infection
    nanoparticles
    surface modification
    Opis:
    In this research antimicrobial activity of nanoparticles ZnO on perilous bacteria such as Pseudomonas aeruginosa was evaluated. P. aeruginosa is important pathogen that caused burn wound infections as it is multi-drug resistant and has several virulence factors. Fifteen samples of P. aeruginosa were collected from patients who suffering from Burn infections in Al-Hilla teaching hospital burn unit with the age range between (7-80) years old for both genders. After collecting burn samples, the diagnosis and characterization were performed by culturing and biochemical tests. ZnO NPs were synthesized by chemical method, Zinc oxide nanoparticles are well-known to be one of the multifunctional inorganic compounds which are widely used in medical applications. This study aims to prepare ZnO nanoparticles with particle size ranging from 23-29  nm. In the present study, surface modification of ZnO nanoparticles was performed, and influence of modification of the structure and morphological properties was investigated. The resulting nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force (AFM). Zinc oxide nanoparticles with the average diameter of about 29 nm were modified with an oleic acid to exert more compatibility. From the results obtained it is suggested that modified ZnO-nanoparticles could be used effectively in safety environmental and medical applications. Antibacterial activity for nanoparticle ZnO against P. aeruginosa isolates was measured by: Agar Diffusion Technique and Minimum Inhibitory Concentration (MIC)/Minimum bactericidal Concentration (MBC) with microdilution. The best zone of inhibition was (35.5mm) at a concentration of 40 μg/ml of nano-ZnO in one strain of P. aeruginosa while the lowest inhibition zone was (16 mm) at a concentration of 20 μg/ml of nano ZnO in one strain also. In addition, all P. aeruginosa isolates were completely inhibited at the concentration of 3.7 μg/ml of nano-ZnO (MIC) but no significant antibacterial activity was observed at concentrations less than 1.8 μg/ml of nano-ZnO and the (MBC) was same as MIC (3.7 μg/ml) for all P.aeruginosa isolates.
    Źródło:
    World Scientific News; 2016, 33; 1-14
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Screening of phytochemical profile and antibacterial activity of various solvent extracts of marine algae Sargassum swartzii
    Autorzy:
    Sujatha, Ravi
    Siva, Durairaj
    Nawas, P. Mohideen Askar
    Powiązania:
    https://bibliotekanauki.pl/articles/1076470.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Aeromonas hydrophila
    Antibacterial activity
    Pseudomonas aeruginosa
    Sargassum swartzii
    Total flavonoid
    Total phenol
    Opis:
    The present study investigates phytochemical screening and antibacterial efficacy of various solvent extracts of marine algae such as Sargassum swartzii against some selected human and fish pathogenic bacteria. The brown seaweed Sargassum swartzii was collected from Kudankulam, Tirunelveli district, Tamil Nadu, India. Soxhlet extraction method was used to get the extracts of different solvents like aqueous, ethanol, methanol, acetone and were tested for their qualitative phytochemical screening using common standard tests. Quantitative phytochemical analysis such as total phenolic content and total flavonoid content of S. swartzii and antibacterial activity against human pathogens viz., Escherichia coli, Pseudomonas aeruginosa and Stephylococcus aureus and fish pathogens viz., Aeromonas hydrophila and Vibrio vulnificus bacteria using disc diffusion methods. Preliminary phytochemical screening of sixteen different chemical compounds were carried out. The maximum biochemical compounds were present in the ethanol extract and the minimum compounds were present in aqueous extract. The ethanol extract was significantly higher in phenolic content (15.35 ±2.61 mg of GAE/g) and the methanol extract was significantly higher in flavonoides content (26.92±7.14 mg of QE/g). In human pathogen the highest antibacterial activity was present in Pseudomonas aeruginosa (18.00±0.00mm) and the fish pathogen was significantly higher in Aeromonas hydrophila. The present study showed that the ethanol extract of marine brown seaweed Sargassum swartzii contains bio active constituents with highest antibacterial activity against human and fish pathogen.
    Źródło:
    World Scientific News; 2019, 115; 27-40
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antibiotic Susceptibility Profiling of Bacterial Biodiversity Associated with Urinary Tract Infections
    Autorzy:
    Prasad, Bhairav
    Arora, Priya
    Powiązania:
    https://bibliotekanauki.pl/articles/1193375.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Antibiotics
    Escherichia coli
    Klebsiella
    Pseudomonas
    Sensitivity profiling
    Staphylococcus
    Urinary system
    Urinary tract infections
    Opis:
    Urinary tract infections (UTI’s) are a bacterial infection that affects any part of the urinary tract. Urinary tract infection is one of the major diseases that affect people of all age groups and sexes and can be separated into asymptomatic and symptomatic. The normal urinary tract is sterile but gets infected with the normal flora and opportunistic pathogens. Urinary tract infections (UTIs) are a serious health problem affecting millions of people each year. This is the second most common type of infection in the body. In the present study 20 morphologically different bacterial isolates were recovered from 50 different urine samples from UTI’s patient. The prevalence of the isolates was varied with E. coli (40%), followed by Staphylococcus spp., Pseudomonas spp. and Klebsiella spp. each of (20%) respectively. All the isolates of different bacteria were tested for antibiotic sensitivity patterns against common antibiotics viz. Ampicillin, Tetracycline, Chloramphenicol, Vancomycin, Nitrofurontione and Ciprofloxacin with potencies of 30 μg each. The sensitive pattern of the isolates towards antibiotic Nitrofurontoine was (75%) followed by Tetracycline (55%) and Ciprofloxacin (45%). Intermediate activity was reported against Ampicillin (45%), Chloramphenicol and vancomycin (40%). Resistant pattern shown against vancomycin (60%), Chloramphenicol (45%), while both tetracycline and Ciprofloxacin shown (30%) against the UTI’s isolates. Therefore, drugs like Nitrofurontoine, Tetracycline and Ciprofloxacin are the most effective choices against the common UTI’s isolates.
    Źródło:
    World Scientific News; 2021, 155; 129-139
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling and analysis of batch extraction process for efficient removal of cadmium and pathogens from aqueous solution using modified plantain peel biochar
    Autorzy:
    Nworie, F. S.
    Oti, W. O.
    Nwali, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193435.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Aspergillus
    Biochar
    Candida
    Escherichia coli
    Pseudomonas aeuroginosa
    Staphylococcus aureus
    cadmium (II)
    equilibrium studies
    mass transfer
    pathogens
    Opis:
    Consumption of water contaminated with pathogens and heavy metals is responsible for the demise of millions of people around the globe. To find a low cost, facile and benign route for developing a biosorbent capable of handling the challenges associated with unsafe drinking water, the study report the preparation, activation, adsorption and removal of cadmium and pathogenic organisms from water samples. Modified plantain peel biochar (MPPB) was characterized using Braunauer-Emmett-Teller (BET) surface area and X-Ray diffraction (XRD). Surface area and pore size of the MPPB determined from BET surface area plot are 8.79 cc/g and 16.69 m2/g respectively with XRD crystallite size of 14.56 nm. The maximum adsorption capacity was observed to be 366.300 mmolkg-1. Equilibrium isotherm indicated the coefficient of determination to increase from Jovanovich →Elovic→Temkin→Freundlich→Langmuir model. Surface interaction and mass transfer kinetics shows a mixture of intra-particle diffusion and mass transfer process. The adsorption kinetics and surface interaction models coefficient of determination increased from Bangham pore diffusion →mass transfer model→Liquid film diffusion→pseudo first order→Dunwald-Wagner→Elovic→Pseudo-second order→Weber and Moris model. The adsorption indicated a chemisorption process with rate limitimg step likely to involve electron pair donor-acceptor interactions, hydrogen bonding and dipole dipole interactions. Antimicrobial evaluation of MPPB showed that it is a potential antimicrobial agent against common micro-organisms.
    Źródło:
    World Scientific News; 2021, 157; 1-24
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Novel alkoxy (1,2,3-triazole) benzaldehyde hybrids as antimicrobial agents, SAR studies
    Autorzy:
    Wilson, Christian
    Safi, Shahrukh Khan
    Dhamsaniya, Ashish
    Trivedi, Prachi
    Chhatbar, Pratiksha
    Shah, Anamik
    Powiązania:
    https://bibliotekanauki.pl/articles/1062812.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Acinetobacter baumannii
    Candida albicans
    Cryptococcus neoformans
    Escherichia coli
    Klebsiella pneumoniae
    Pseudomonas aeruginosa
    Vanilla planifolia
    antimicrobial evaluation
    benzaldehyde hybrids
    triazole
    Opis:
    A novel series of 2-alkoxy (1,2,3-triazole) benzaldehyde hybrids composed of Vanillin are synthesized for antimicrobial evaluation. Of antimicrobial strains tested, consisted of Staphylococcus aureus ATCC 43300 was treated as gram positive bacteria strain and Escherichia coli ATCC 25922, Klebsiella pneumoniae ATCC 700603, Acinetobacter baumannii ATCC 19606 Pseudomonas aeruginosa ATCC 27853 were evaluated as gram-positive bacteria Candida albicans ATCC 90028 (yeast) Cryptococcus neoformans var. grubii H99 ATCC 208821 yeast.
    Źródło:
    World Scientific News; 2019, 128, 1; 1-70
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Garlic Extract Addition on Tilapia Skin Gelatin Based Edible Coating Towards Antimicrobial Properties and Fish Meatball’s Shelf Life
    Autorzy:
    Reynaldi, Ahmad
    Rostini, Iis
    Afrianto, Eddy
    Rochima, Emma
    Powiązania:
    https://bibliotekanauki.pl/articles/1058047.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    E. coli
    Pseudomonas aeruginosa
    Salmonella typhimurium
    Staphyllococcus aureus
    TPC
    edible coating
    extract
    garlic
    pH values
    shelf life
    tilapia gelatin
    Opis:
    The purpose of this research is to determine the best concentration and effect of garlic extract incorporated on tilapia skin gelatin-based edible coating to preserve and extend the shelf life of fish meatball at cold storage. This research was conducted from May 2018 until October 2018 on Fisheries Product Processing Laboratory of The Faculty of Fisheries and Marine Sciences, Universitas Padjadjaran. The garlic extract conducted with maceration method with ethanol 96% was performed at Organic Chemical Laboratory FMIPA Universitas Padjadjaran, and for TPC test, inhibition test of edible coating Tilapia’s fish-skin with garlic extract was conducted in Microbiology and Molecular Biotechnology Laboratory of Faculty of Fisheries and Marine Sciences Universitas Padjadjaran. The method used is experimental method with 5 treatments which is meatballs without edible coating. The addition of garlic extract was done with various concentration at 0%, 1%, 1.5%, 2%. The observations were Total Plate Count (TPC) test, inhibition zone test against Pseudomonas aeruginosa, and pH value. The results showed that the best treatment is 2% garlic extract with TPC value 1.1×105 cfu/g during 14 days of storage and concluded that it could extend the shelf life of meatball until 14 days, pH value was 7.03 and inhibition zone against P. aeruginosa was 7.01 mm. The addition of garlic extract on tilapia skin gelatin-based edible coating could extend the shelf life of fish meatballs until 14 days on cold storage.
    Źródło:
    World Scientific News; 2019, 134, 2; 74-85
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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