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You searched for: Journal name Journal of applied microbiology Remove constraint Journal name: Journal of applied microbiology Publication year rev 7994-2006 Remove constraint Publication year rev: 7994-2006 Source 2006 v.101 no.5 Remove constraint Source: 2006 v.101 no.5
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1. Addition of oxidizing or reducing agents to the reaction medium influences amino acid conversion to aroma compounds by Lactococcus lactis

Author:
Kieronczyk, A.; Cachon, R.; Feron, G.; Yvon, M.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1114-1122
ISSN:
1364-5072
Subject:
Lactococcus lactis; aldehydes; almonds; amino acid metabolism; amino acids; cabbage; carboxylic acids; cheese industry; cheese starters; cheeses; odor compounds; odors; oxidation; redox potential; reducing agents; sulfur; transamination
Abstract:
... The aim of this research was to investigate the impact of extracellular redox potential (Eh) on amino acid conversion to aroma compounds by Lactococcus lactis that is commonly used as a starter in the cheese industry. The study was realized in vitro by incubating resting cells of L. lactis in reaction media in which Eh was modified by the addition of oxidizing or reducing agents. Oxidative conditi ...
DOI:
10.1111/j.1365-2672.2006.02999.x

2. Assessment of DNA damage and repair in Mycobacterium terrae after exposure to UV irradiation

Author:
Bohrerova, Z.; Linden, K.G.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 995-1001
ISSN:
1364-5072
Subject:
DNA damage; DNA repair; Escherichia coli; Mycobacterium terrae; Mycobacterium tuberculosis; bacteria; disinfection; irradiation; lamps; mercury; nucleic acids; ultraviolet radiation; viability; wastewater treatment
Abstract:
... Ultraviolet (UV) irradiation for drinking water treatment was examined for inactivation and subsequent dark and photo-repair of Mycobacterium terrae. UV sources tested were low pressure (monochromatic, 254 nm) and medium pressure (polychromatic UV output) Hg lamps. UV exposure resulted in inactivation, and was followed by dark or photo-repair experiments. Inactivation and repair were quantified ut ...
DOI:
10.1111/j.1365-2672.2006.03023.x

3. Campylobacter jejuni inactivation in New Zealand soils

Author:
Ross, C.M.; Donnison, A.M.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1188-1197
ISSN:
1364-5072
Subject:
Campylobacter jejuni; application rate; dairy farming; detection limit; drainage; leachates; pumice; rain; soil; New Zealand
Abstract:
... The study was undertaken to determine the inactivation rate of Campylobacter jejuni in New Zealand soils. Farm dairy effluent (FDE) inoculated at c. 10⁵ ml⁻¹ with C. jejuni was applied to intact soil cores at a rate of 2 l m⁻². Four soils were used: Hamilton (granular); Taupo (pumice); Horotiu and Waihou (allophanic). After FDE application cores were incubated at 10°C for up to 32 days. For all fo ...
DOI:
10.1111/j.1365-2672.2006.02984.x

4. Carbon : nitrogen : phosphorus ratios influence biofilm formation by Enterobacter cloacae and Citrobacter freundii

Author:
Thompson, L.J.; Gray, V.; Lindsay, D.; von Holy, A.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1105-1113
ISSN:
1364-5072
Subject:
Citrobacter freundii; Enterobacter cloacae; activated carbon; biofilm; biohydrogen; bioreactors; fluidized beds; nitrogen; phosphorus; sucrose
Abstract:
... To test the effects of C : N : P ratio modification of a well-known nutrient medium formulation, the Endo formulation on biofilm formation by Enterobacter cloacae Ecl and Citrobacter freundii Cf1 in both single-species and binary species biofilms. The C : N : P atom : atom ratio of a well-known nutrient medium formulation, the Endo formulation, that has been applied in fermentative biohydrogen stu ...
DOI:
10.1111/j.1365-2672.2006.03003.x

5. Combined effect of mild heat and acetic acid treatment for inactivating Escherichia coli O157:H7, Listeria monocytogenes and Salmonella typhimurium in an asparagus puree

Author:
Shin, J.-H.; Lee, S.-Y.; Dougherty, R.H.; Rasco, B.; Kang, D.-H.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1140-1151
ISSN:
1364-5072
Subject:
vegetables; acetic acid; Salmonella Typhimurium; heat; food pathogens; color; Listeria monocytogenes; Escherichia coli O157; temperature; acid treatment; adverse effects
Abstract:
... This study was conducted to validate combined heat and acid treatments for inactivating Escherichia coli O157:H7, Listeria monocytogenes and Salmonella typhimurium in an acidified brine containing, or pickled, asparagus model food. A mixture of three strains of E. coli O157:H7, L. monocytogenes and S. typhimurium were inoculated onto pickled asparagus samples. Combinations of various concentration ...
DOI:
10.1111/j.1365-2672.2006.02996.x

6. Commensal bacilli inhibitory to mastitis pathogens isolated from the udder microbiota of healthy cows

Author:
Al-Qumber, M.; Tagg, J.R.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1152-1160
ISSN:
1364-5072
Subject:
Gram-positive bacteria; anti-infective properties; bovine mastitis; cows; heat; indicator species; pathogens; probiotics; udders
Abstract:
... To isolate from the microbiota of the healthy cow udder commensal bacteria having antimicrobial activity against bovine mastitis pathogens, with a long-term view to their potential application as antimastitis probiotics. Bacterial isolates from four healthy cow udders were tested for inhibitory activity against three Gram-positive indicator bacteria. This led to the selection of nine broadly inhib ...
DOI:
10.1111/j.1365-2672.2006.03004.x

7. Degradation of mikan (Japanese mandarin orange) peel by a novel Penicillium species with cellulolytic and pectinolytic activity

Author:
Fujii, K.; Shintoh, Y.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1169-1176
ISSN:
1364-5072
Subject:
Penicillium; activated sludge; agricultural wastes; biodegradation; carbon; composts; endo-1,4-beta-glucanase; fungi; gas chromatography; mandarins; mass spectrometry; metabolites; mycotoxins; phylogeny; polygalacturonase; sediments; soil ecology; toxicity; Japan
Abstract:
... The mikan, or Japanese mandarin orange, is a popular fruit in Japan, but its peel is one of the major agricultural wastes. The aims of this study were to screen, isolate, and characterize a mikan peel-degrading microbe. Several samples including activated sludge, sediment, compost and spoiled mikan peel were collected and cultured in a minimal salt medium containing mikan peel as the sole carbon s ...
DOI:
10.1111/j.1365-2672.2006.02998.x

8. Evaluation of novel fluorogenic substrates for the detection of glycosidases in Escherichia coli and enterococci

Author:
Perry, J.D.; James, A.L.; Morris, K.A.; Oliver, M.; Chilvers, K.F.; Reed, R.H.; Gould, F.K.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 977-985
ISSN:
1364-5072
Subject:
Enterococcus; Escherichia coli; bacteria; beta-glucosidase; beta-glucuronidase; enzyme substrates; esters; fluorescence; glucose; glucosides; hydrolysis; indicator species; microbial growth
Abstract:
... Enzyme substrates based on 4-methylumbelliferone are widely used for the detection of Escherichia coli and enterococci in water, by detection of β-glucuronidase and β-glucosidase activity respectively. This study aimed to synthesize and evaluate novel umbelliferone-based substrates with improved sensitivity for these two enzymes. A novel β-glucuronide derivative based on 6-chloro-4-methylumbellife ...
DOI:
10.1111/j.1365-2672.2006.03018.x

9. F⁺RNA coliphage typing for microbial source tracking in surface waters

Author:
Stewart-Pullaro, J.; Daugomah, J.W.; Chestnut, D.E.; Graves, D.A.; Sobsey, M.D.; Scott, G.I.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1015-1026
ISSN:
1364-5072
Subject:
Escherichia coli; agar; coliform bacteria; coliphages; humans; isolation techniques; pollution; surface water; temperature; wastewater; water quality; South Carolina
Abstract:
... The utility of coliphages to detect and track faecal pollution was evaluated using South Carolina surface waters that exceeded State faecal coliform standards. Coliphages were isolated from 117 surface water samples by single agar layer (SAL) and enrichment presence/absence (EP/A) methods. Confirmed F⁺RNA coliphages were typed for microbial source tracking using a library-independent approach. Con ...
DOI:
10.1111/j.1365-2672.2006.03011.x

10. Genetic diversity and description of transmission routes for Campylobacter on broiler farms by amplified-fragment length polymorphism

Author:
Johnsen, G.; Kruse, H.; Hofshagen, M.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1130-1139
ISSN:
1364-5072
Subject:
Campylobacter; amplified fragment length polymorphism; biosecurity; farms; flocks; genetic variation; poultry
Abstract:
... To investigate the genetic diversity of Campylobacter in broilers and in the environment of broiler farms, to compare the genetic profiles and describe critical factors for transmission to broilers. Flocks at three of four investigated farms became colonized with Campylobacter. The total proportion of Campylobacter-positive samples at different farms varied from 20% to 42%. The farm with the poore ...
DOI:
10.1111/j.1365-2672.2006.02995.x

11. Genetic variability of Campylobacter jejuni isolated from fresh and frozen broiler carcasses

Author:
Wieland, B.; Sandberg, M.; Johannessen, G.S.; Bohlin, J.; Hofshagen, M.; Cudjoe, K.S.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1027-1032
ISSN:
1364-5072
Subject:
Campylobacter jejuni; amplified fragment length polymorphism; cattle; chicken carcasses; cold tolerance; flocks; fluorescence; freezing; genetic variation; genotype; humans; poultry; restriction endonucleases; Norway
Abstract:
... The aim of this study was to determine the genetic variability of Campylobacter jejuni isolates from poultry before and after freezing treatment in order to identify genotypes that would survive the treatment. C. jejuni was isolated from both fresh and frozen halves of the same carcass after freezing for 2 or more than 20 days at -20°C. From 36 carcasses, representing five unrelated flocks in Norw ...
DOI:
10.1111/j.1365-2672.2006.03015.x

12. Interaction of Desulfovibrio desulfuricans biofilms with stainless steel surface and its impact on bacterial metabolism

Author:
Lopes, F.A.; Morin, P.; Oliveira, R.; Melo, L.F.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1087-1095
ISSN:
1364-5072
Subject:
Desulfovibrio desulfuricans; anaerobic conditions; biofilm; chromium; corrosion; ions; metabolism; nickel; stainless steel; sulfate-reducing bacteria
Abstract:
... To study the influence of some metallic elements of stainless steel 304 (SS 304) on the development and activity of a sulfate-reducing bacterial biofilm, using as comparison a reference nonmetallic material polymethylmethacrylate (PMMA). Desulfovibrio desulfuricans biofilms were developed on SS 304 and on a reference nonmetallic material, PMMA, in a flow cell system. Steady-state biofilms were met ...
DOI:
10.1111/j.1365-2672.2006.03001.x

13. Introduction of air in the anaerobic culture of Streptococcus pneumoniae serotype 23F induces the release of capsular polysaccharide from bacterial surface into the cultivation medium

Author:
Gonçalves, V.M.; Takagi, M.; Carneiro, S.M.; Giordano, R. de Campos; Tanizaki, M.M.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1009-1014
ISSN:
1364-5072
Subject:
Streptococcus pneumoniae; absorbance; air; air sparging; bacteria; bioreactors; culture media; microscopy; nitrogen; production costs; serotypes; vaccines; viability
Abstract:
... An approach to increase Streptococcus pneumoniae capsular polysaccharide (CPS) in the culture medium during fed-batch cultivation in bioreactor. Streptococcus pneumoniae serotype 23F was cultivated in a 5-l bioreactor with nitrogen-sparging and followed by addition of air in the stationary phase. The amount of CPS released in the supernatant progressively increased under air sparging. The profile ...
DOI:
10.1111/j.1365-2672.2006.03012.x

14. Lipolytic activity of Antarctic cold-adapted marine bacteria (Terra Nova Bay, Ross Sea)

Author:
Lo Giudice, A.; Michaud, L.; de Pascale, D.; De Domenico, M.; di Prisco, G.; Fani, R.; Bruni, V.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1039-1048
ISSN:
1364-5072
Subject:
Pseudoalteromonas; Psychrobacter; Vibrio; bacteria; culture media; environmental factors; enzymes; fatty acid esters; industrial applications; lipids; lipolysis; pH; salt concentration; sodium chloride; temperature; Antarctic region
Abstract:
... The aim of this study was to investigate the lipolytic activity of cold-adapted Antarctic marine bacteria and, furthermore, the combined effect of some environmental factors on this enzymatic process. Strains were assayed for lipolytic activity on a basal medium amended with seven individual fatty acid esters. A significant activity was observed for 148 isolates (95·5% of the total screened). The ...
DOI:
10.1111/j.1365-2672.2006.03006.x

15. Optimum melanin production using recombinant Escherichia coli

Author:
Lagunas-Muñoz, V.H.; Cabrera-Valladares, N.; Bolívar, F.; Gosset, G.; Martínez, A.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1002-1008
ISSN:
1364-5072
Subject:
Escherichia coli; Rhizobium etli; animals; eumelanin; fermenters; genes; pH; plant tissues; polymers; temperature; tyrosine
Abstract:
... A parametric study was conducted to define optimum conditions to achieve high yields in the conversion of tyrosine to eumelanin (EuMel) using recombinant Escherichia coli. Escherichia coli W3110 (pTrcMutmelA) expressing the tyrosinase coding gene from Rhizobium etli and glucose-mineral media were used to transform tyrosine into EuMel. Batch aerobic fermentor cultures were performed to study the ef ...
DOI:
10.1111/j.1365-2672.2006.03013.x

16. Surface decontamination of beef inoculated with Salmonella Typhimurium DT104 or Escherichia coli O157:H7 using dry air in a novel heat treatment apparatus

Author:
McCann, M.S.; McGovern, A.C.; McDowell, D.A.; Blair, I.S.; Sheridan, J.J.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1177-1187
ISSN:
1364-5072
Subject:
temperature; food surfaces; decontamination; cell viability; researchers; trade; Salmonella Typhimurium; heat; air; beef; color; Escherichia coli O157; heat treatment; catering; pathogens
Abstract:
... To determine the effectiveness of a novel dry air decontamination apparatus in the deactivation of Salmonella serotype Typhimurium DT104 or Escherichia coli O157:H7 on beef surfaces. A laboratory scale dry air decontamination apparatus, capable of producing repeatable and known heating time-temperature cycles on food surfaces was used in decontamination trials. Beef samples were surface inoculated ...
DOI:
10.1111/j.1365-2672.2006.02988.x

17. Use of n-hexadecane as an oxygen vector to improve Phaffia rhodozyma growth and carotenoid production in shake-flask cultures

Author:
Liu, Y.S.; Wu, J.Y.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1033-1038
ISSN:
1364-5072
Subject:
carotenoids; fermentation; hexadecane; oxygen; yeasts
Abstract:
... To identify beneficial oxygen vectors for Phaffia rhodozyma in liquid cultures, and to evaluate their use to improve the oxygen transfer and carotenoid production in the yeast cultures. Several liquid hydrocarbons were tested as oxygen vectors for improving the yeast growth and carotenoid production in shake-flask cultures of P. rhodozyma. While all nontoxic organic liquids (Log P: >=5·6) showed a ...
DOI:
10.1111/j.1365-2672.2006.03009.x

18. Degradation of naphthenic acids by sediment micro-organisms

Author:
Del Rio, L.F.; Hadwin, A.K.M.; Pinto, L.J.; MacKinnon, M.D.; Moore, M.M.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1049-1061
ISSN:
1364-5072
Subject:
Pseudomonas fluorescens; Pseudomonas putida; biodegradation; carbon; coculture; constructed wetlands; environmental factors; gas chromatography; hydrochemistry; mass spectrometry; microbial communities; microorganisms; naphthenates; oil sands; petroleum; surfactants; toxicity; water treatment; Alberta
Abstract:
... Naphthenic acids (NAs) are naturally occurring, linear and cyclic carboxylic surfactants associated with the acidic fraction of petroleum. NAs account for most of the acute aquatic toxicity of oil sands process-affected water (OSPW). The toxicity of OSPW can be reduced by microbial degradation. The aim of this research was to determine the extent of NA degradation by sediment microbial communities ...
DOI:
10.1111/j.1365-2672.2006.03005.x

19. Glutamate dehydrogenase activity in lactobacilli and the use of glutamate dehydrogenase-producing adjunct Lactobacillus spp. cultures in the manufacture of cheddar cheese

Author:
Williams, A.G.; Withers, S.E.; Brechany, E.Y.; Banks, J.M.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1062-1075
ISSN:
1364-5072
Subject:
interspecific variation; volatile compounds; glutamate dehydrogenase; cheese ripening; Lactobacillus plantarum; Cheddar cheese; flavor; enzyme activity; glutamic acid; odors
Abstract:
... The study was undertaken to investigate the occurrence of glutamate dehydrogenase activity in different species of lactobacilli, and to determine, in a series of cheese-making trials, the effects of glutamate dehydrogenase-producing adjunct cultures on sensory attribute development during the maturation of cheddar cheese. The presence of dehydrogenase activity with glutamate as substrate was monit ...
DOI:
10.1111/j.1365-2672.2006.03017.x
PubMed:
17040230

20. Human astroviruses in raw sewage samples in Hungary

Author:
Meleg, E.; Jakab, F.; Kocsis, B.; Bányai, K.; Melegh, B.; Szűcs, G.
Source:
Journal of applied microbiology 2006 v.101 no.5 pp. 1123-1129
ISSN:
1364-5072
Subject:
Astroviridae; RNA; drinking water; environmental factors; genotype; guanidinium; humans; monitoring; phylogeny; pollution; polyethylene glycol; public health; reverse transcriptase polymerase chain reaction; screening; sequence analysis; sewage; viruses; wastewater; water microbiology; Hungary
Abstract:
... Routine procedures for monitoring viruses in water samples have not been drawn up for the water-microbiology screening panel. Enteric viruses, including astroviruses, are able to persist under environmental conditions and may cause public health problems by contaminating natural and drinking water resources. The aim of this study was to detect human astroviruses (HAstVs) from raw wastewater sample ...
DOI:
10.1111/j.1365-2672.2006.02997.x