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Publisher: Horizon Research Publishing   (Total: 54 journals)   [Sort by number of followers]

Showing 1 - 54 of 54 Journals sorted alphabetically
Advances in Diabetes and Metabolism     Open Access   (Followers: 23)
Advances in Economics and Business     Open Access   (Followers: 16)
Advances in Energy and Power     Open Access   (Followers: 15)
Advances in Pharmacology and Pharmacy     Open Access   (Followers: 6)
Advances in Signal Processing     Open Access   (Followers: 13)
Advances in Zoology and Botany     Open Access  
Bioengineering and Bioscience     Open Access   (Followers: 1)
Cancer and Oncology Research     Open Access   (Followers: 10)
Chemical and Materials Engineering     Open Access   (Followers: 20)
Civil Engineering and Architecture     Open Access   (Followers: 23)
Computational Research     Open Access   (Followers: 1)
Computer Science and Information Technology     Open Access   (Followers: 13)
Energy and Environmental Engineering     Open Access   (Followers: 7)
Environment and Ecology Research     Open Access   (Followers: 8)
Food Science and Technology     Open Access   (Followers: 3)
Immunology and Infectious Diseases     Open Access   (Followers: 9)
Intl. J. of Biochemistry and Biophysics     Open Access   (Followers: 1)
Intl. J. of Cardiovascular and Cerebrovascular Disease     Open Access   (Followers: 2)
Intl. J. of Neuroscience and Behavioral Science     Open Access   (Followers: 1)
Linguistics and Literature Studies     Open Access   (Followers: 4)
Manufacturing Science and Technology     Open Access   (Followers: 3)
Mathematics and Statistics     Open Access   (Followers: 5)
Nanoscience and Nanoengineering     Open Access   (Followers: 1)
Natural Resources and Conservation     Open Access   (Followers: 6)
Nursing and Health     Open Access   (Followers: 4)
Open J. of Dentistry and Oral Medicine     Open Access   (Followers: 1)
Sociology and Anthropology     Open Access   (Followers: 5)
Sport and Art     Open Access   (Followers: 1)
Universal J. of Accounting and Finance     Open Access   (Followers: 2)
Universal J. of Agricultural Research     Open Access   (Followers: 1)
Universal J. of Applied Mathematics     Open Access   (Followers: 5)
Universal J. of Applied Science     Open Access   (Followers: 2)
Universal J. of Biomedical Engineering     Open Access  
Universal J. of Chemistry     Open Access   (Followers: 1)
Universal J. of Clinical Medicine     Open Access  
Universal J. of Communications and Network     Open Access   (Followers: 1)
Universal J. of Computational Mathematics     Open Access   (Followers: 5)
Universal J. of Control and Automation     Open Access   (Followers: 3)
Universal J. of Educational Research     Open Access   (Followers: 1)
Universal J. of Electrical and Electronic Engineering     Open Access   (Followers: 6)
Universal J. of Engineering Science     Open Access   (Followers: 2)
Universal J. of Food and Nutrition Science     Open Access   (Followers: 5)
Universal J. of Geoscience     Open Access   (Followers: 4)
Universal J. of Industrial and Business Management     Open Access   (Followers: 1)
Universal J. of Management     Open Access   (Followers: 2)
Universal J. of Materials Science     Open Access   (Followers: 3)
Universal J. of Mechanical Engineering     Open Access   (Followers: 15)
Universal J. of Medical Science     Open Access  
Universal J. of Microbiology Research     Open Access  
Universal J. of Physics and Application     Open Access   (Followers: 2)
Universal J. of Plant Science     Open Access  
Universal J. of Psychology     Open Access   (Followers: 3)
Universal J. of Public Health     Open Access   (Followers: 2)
World J. of Computer Application and Technology     Open Access   (Followers: 3)
Journal Cover
Universal Journal of Microbiology Research
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2331-6721 - ISSN (Online) 2331-673X
Published by Horizon Research Publishing Homepage  [54 journals]
  • Biodegradation of Anionic Surfactants from Oilfield Detergents in Aquatic
           Systems

    • Abstract: Publication date:  Mar 2018
      Source:Universal Journal of Microbiology Research  Volume  6  Number  1  Anwuli U. Osadebe   Chinelo A. Onyiliogwu   and Gideon C. Okpokwasili   The biodegradability of anionic surfactants in oilfield detergents was investigated using water samples from the New Calabar River and Tap water. The detergents analyzed were D.D-Y, D.G-X, SUR-500, SW-1000 and Bio-Boost. The anionic surfactant, Sodium dodecyl sulphate (SDS) was employed as a reference. The total heterotrophic counts in the water samples were determined using the spread plate technique while the detergent-utilizers were investigated using Mineral salt agar. Biodegradation was evaluated by monitoring Methylene Blue Active Substance (MBAS) using the "River die-away" method. The percentage MBAS remaining, after the 28 day study period, in increasing order was SDS < SUR-500 < SW-1000 < Bio-boost < D.D-Y < D.G-X; SDS was the most biodegraded. SUR-500, SW-1000 and Bio-boost supported the highest growth of utilizers. The detergent-utilizing bacteria isolated belonged to the genera Proteus, Acinetobacter, Enterobacter, Staphylococcus, Bacillus, Pseudomonas, Arthrobacter, Corynebacterium and Micrococcus. A steady increase in total viable count, pH and optical density was observed during biodegradation. The detergents tested could be considered biodegradable as they had an average of 91% - 97% primary biodegradation at the end of the 28 day test period which is within the biodegradability standards set by the Soap and Detergent Association (SDA) and the Organisation for Economic Co-operation and Development (OECD).
      PubDate: Mar 2018
       
  • A Study of Central Line Associated Blood Stream Infections among Patients
           

    • Abstract: Publication date:  Mar 2018
      Source:Universal Journal of Microbiology Research  Volume  6  Number  1  Marwa Mostafa Shalaby   Kareman Ahmed Eshra   Radwa Abd El moteleb Essa   and Ghada Mahmoud Alghazaly   Background: Central venous catheters (CVCs) are often used as a vascular access in patients with end stage renal diseases when emergency hemodialysis is required, before maturation of arteriovenous fistula or graft, or when a permanent access becomes non-functioning. The most common complication following insertion of a CVC is infections including exit site infection, tunnel infection, or central line related blood stream infections (CLABSIs). Preventing such complications is crucial in these vulnerable patients and this can be accomplished by strict adherence to infection control guidelines. This study aimed to evaluate the efficacy of implementation of a CVC care bundle composed of best evidence based practices to see whether the rates of CLABSIs rates would decrease. Methods: the study was divided into pre and post intervention phases. The duration of each phase was 6 months during which rates of confirmed CLABSIs per 1000 catheter days as well as the causative microorganisms were recorded. The data were then compared and analyzed to evaluate the intervention. Results: CLABSIs rates decreased from 6.7 in phase 1 to 4.1 in phase 2. The relative risk reduction was 0.39. Conclusions: Implementation of bundles for insertion and maintenance of CVCs can help preventing CRBSIs which is very important to improve patient care.
      PubDate: Mar 2018
       
  • Production of Bacteriocin Like Substances as Antipathogenic Metabolites by
           Staphylococcus warneri Isolated from Healthy Human Skin

    • Abstract: Publication date:  Oct 2017
      Source:Universal Journal of Microbiology Research  Volume  5  Number  3  Reazul Karim   Mohammad Nuruddin Mahmud   and M. A. Hakim   Antibiotic resistance is a serious problem of present world and development of viable alternative is urgent. The research work was designed to mitigate this problem. Different types of bacterial colony were isolated from skin of 30 healthy human and their antipathogenic activity was tested against 9 pathogens. The isolate showed activity against four pathogens- Klebsiella. pneumoniae subsp. pneumoniae, Klebsiella. pneumoniae subsp. ozaenae, Staphylococcus. aureus and Pseudomonas. aeruginosa was identified as Staphylococcus. warneri. Variation was found in optimization of cultural conditions (incubation period, incubation temperature and pH) for the most potent antipathogenic metabolites production. Staphylococcus. warneri showed most potent antipathogenic activity at pH 6 to pH 9, at an incubation period of 24h to 48h and at an incubation temperature of 37℃. Antipathogenic metabolites were then detected as bacteriocin like substances. Variation was observed with bacteriocin activity against different pathogens and was found most effective against Klebsiella. pneumonia subsp. pneumonia and Klebsiella. pneumonia subsp. ozaenae Samples containing bacteriocin like substances showed heat stability up to 80℃ for 60 minutes and up to pH 8 for Klebsiella. pneumoniae subsp. pneumoniae and Klebsiella. Pneumoniae sub sp. ozaenae. Papain treated cell-free supernatant did not show any bacteriocin activity, suggesting that the substances could be antimicrobial peptides. Solvent extraction of bacteriocin was performed by using chloroform where maximum bacteriocin activity was found in interface layer rather than aqueous and organic layer.
      PubDate: Oct 2017
       
  • Phytochemical Screening and Antimicrobial Activity of Ethanoic Extract of
           Passiflora edulis var. flavicarpa Seed on Selected Pathogens

    • Abstract: Publication date:  Oct 2017
      Source:Universal Journal of Microbiology Research  Volume  5  Number  3  Anulika Mercy Kanu   Agwu Chukwuemeka Okorie   Chidiebere Uche   and Ugochi Nwoke Awa   The present situation of drug resistance in the world necessitates the need to intensify researches on the use of alternative strategies for effective control of infections using products obtained from plant extracts. Hence this study was undertaken to evaluate the phytochemical and antimicrobial properties of ethanoic extracts of Passiflora edulis var. flavicarpa seed by testing them against three clinically important pathogens namely: Staphylococcus aureus, Escherichia coli and Candida albicans. Agar diffusion method was used in determining the susceptibility pattern of the different seed extracts concentrations (25%, 50%, 75% and 100%) on the test organisms (Escherichia coli, Staphylococcus aureus and Candida albicans). The Passiflora edulis var. flavicarpa seed extract was subjected to phytochemical screening for presence of bioactive compounds using standard procedures. From the results, the zone of inhibition of the ethanoic extract at varying concentrations (100%, 75%, 50% and 25%) on Staphylococcus aureus ranged from 6mm to 18mm, Escherichia coli 5mm to 11mm and Candida albicans 5mm to 18mm. The growth of all the organisms was inhibited, through to varying degrees with Staphylococcus aureus and Candida albicans being more susceptible than Escherichia coli. The phytochemical screening revealed the presence of tannins, flavonoids, saponins, alkaloids, steroid, glycosides, saponin glycoside, terpenes and cyanogenic glycosides. The antimicrobial activity of this extract is possibly linked to the presence of flavonoids, alkaloids, steroid, saponins and/or tannins. The result obtained in the study is an indication that passion seed has the potential to be used as a source for new broad spectrum antimicrobials.
      PubDate: Oct 2017
       
  • Optimization and Production of Industrial Important Cellulase Enzyme from
           Penicillium citrinum in Western Ghats of Sathuragiri Hills Soil Sample
           Isolate

    • Abstract: Publication date:  Mar 2017
      Source:Universal Journal of Microbiology Research  Volume  5  Number  1  S. Muthukrishnan   In optimization of cellulase production by different pH, substrates, nitrogen, carbon sources were detected from penicillium citrinum micro-fungal species. The maximum cellulase activity was recorded in the range of pH- 5 to 6.5 and wheat bran (91 U/ml) and rice bran (81 U/ml) is the best raw substrate for the production of cellulase. Estimation of extracellular protein was recorded in different production medium of Penicillium citrinum (1.63 mg/ml) for maltose followed by sucrose (1.46 mg/ml), fructose (1.13 mg/ml), wheat bran (1.12 mg/ml), peptone (0.88 mg/ml) and yeast extract (0.82 mg/ml). The highest extracellular protein was recorded in pH 5.5 to 6.5 followed by substrate for wheat bran (1.12 mg/ml), rice bran (1.04 mg/ml), paddy straw (1.03 mg/ml). In nitrogen sources, ammonium sulphate (141 U/ml) and ammonium nitrate (121 U/ml) is the best nitrogen source for the production of cellulase enzyme. The maximum cellulase activity was recorded in glucose (134 U/ml) and maltose (159 U/ml) was best carbon source for the production of cellulase.
      PubDate: Mar 2017
       
  • Isolation and Screening of Lignolytic Fungi from Various Ecological Niches

    • Abstract: Publication date:  Aug 2017
      Source:Universal Journal of Microbiology Research  Volume  5  Number  2  Anuja Sharma   Neeraj K. Aggarwal   and AnitaYadav   Lignin is a major noncarbohydrate polyphenolic structural constituent of cell wall of all the vascular plants and is present in association with cellulose and hemicellulose. It is the second most abundant polymer after cellulose. Lignin is well known for its resistance to microbial degradation because of its high molecular weight and various biologically stable carbon-carbon and ether linkages. Seventy two fungal isolates capable of utilizing lignocellulosic biomass were isolated from different ecological samples. When subjected to primary screening by qualitative plate assay method using methyl orange, azure B, guaiacol and tannic acid as indicators for determining the lignolytic potential, 22 isolates were found positive for at least one of the indicators. Six isolates were found to exhibit all the three extracellular enzyme activities on quantitative estimation of laccase, manganese peroxidase and lignin peroxidase activities. Highest laccase activity was produced by ANF238 (3.42U/ml) while highest manganese peroxidase and lignin peroxidase activities were produced by ANF 212 (0.254U/ml) and ANF238 (0.22U/ml) respectively.
      PubDate: Aug 2017
       
  • Improvement of Invertase Synthesis by the Mutant Saccharomyces cerevisiae
           through UV Mutagenesis

    • Abstract: Publication date:  Aug 2017
      Source:Universal Journal of Microbiology Research  Volume  5  Number  2  S. Saravanan   Abdul Nasar Kalanthoden   R. Karthikayan   M. Kavitha   and S. Kutti Rani   In fermentation technology, strain improvement of baker's yeast has traditionally relied on random mutagenesis followed by screening for mutant exhibiting enhanced properties of interest. Such mutant organisms are useful in several industries. Saccharomyces cerevisiae can use sucrose as the sole source of both carbon and energy; hydrolysis of this sugar is catalyzed by the enzyme invertase. The main objective of this work is to overcome the glucose repression of invertase by invertase constitutive mutants through UV mutation. This may occur in any glucose repressible genes as a single or double mutation in repressor gene (s) which might cause constitutive synthesis of invertase. These mutated screened strains were optimized with various glucose concentration and different incubation hours for higher invertase production. The maximum synthesis of invertase was 1.066 units/ml in hour from mutant Saccharomyces cerevisiae type-2 strain.
      PubDate: Aug 2017
       
 
 
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