Examination and characterization of distribution system biofilms.

abstract：:Environmental studies of the human-pathogenic bacterium Campylobacter jejuni have focused on linking distributions with potential sources. However, in aquatic ecosystems, the abundance of C. jejuni may also be regulated by predation. We examine the potential for grazing by the freshwater planktonic crustacean Daphnia ...

journal_title：Applied and environmental microbiology

authors： Schallenberg M,Bremer PJ,Henkel S,Launhardt A,Burns CW

更新日期：2005-09-01 00:00:00

abstract：:The pressure resistances of the spores of six Bacillus strains were examined at 5 to 10(deg)C and were compared with their heat resistances. The pressure treatments (at 981 MPa for 40 min and at 588 MPa for 120 min) did not inactivate the spores of B. stearothermophilus IAM12043, B. subtilis IAM12118, and B. lichenifo...

journal_title：Applied and environmental microbiology

authors： Nakayama A,Yano Y,Kobayashi S,Ishikawa M,Sakai K

更新日期：1996-10-01 00:00:00

abstract：:Yarrowia lipolytica produces brown extracellular pigments that correlate with tyrosine catabolism. During tyrosine depletion, the yeast accumulated homogentisic acid, p-hydroxyphenylethanol, and p-hydroxyphenylacetic acid in the medium. Homogentisic acid accumulated under all aeration conditions tested, but its concen...

journal_title：Applied and environmental microbiology

authors： Carreira A,Ferreira LM,Loureiro V

更新日期：2001-08-01 00:00:00

abstract：:The effect of selenite on the growth rate and protein synthesis has been investigated in Rhodobacter sphaeroides. This photosynthetic bacterium efficiently reduces selenite with intracellular accumulation under both dark aerobic and anaerobic photosynthetic conditions. Addition of 1 mM selenite under these two growth ...

journal_title：Applied and environmental microbiology

authors： Bebien M,Chauvin JP,Adriano JM,Grosse S,Verméglio A

更新日期：2001-10-01 00:00:00

abstract：:Ectomycorrhizal (ECM) fungi are important mutualists for the growth and health of most boreal trees. Forest age and its host species composition can impact the composition of ECM fungal communities. Although plentiful empirical data exist for forested environments, the effects of established vegetation and its success...

journal_title：Applied and environmental microbiology

authors： Hui N,Liu X,Kotze DJ,Jumpponen A,Francini G,Setälä H

更新日期：2017-11-16 00:00:00

abstract：:Reverse transcription-PCR analysis of drinking water in the homes of 56 children suffering from rotaviral gastroenteritis has shown the presence of the rotavirus genome in four samples. These strains were different from human rotaviruses detected in the children's feces, as determined by sequencing of the VP7-amplifie...

journal_title：Applied and environmental microbiology

authors： Gratacap-Cavallier B,Genoulaz O,Brengel-Pesce K,Soule H,Innocenti-Francillard P,Bost M,Gofti L,Zmirou D,Seigneurin JM

更新日期：2000-06-01 00:00:00

abstract：:The reduction of cytotoxicity in virus concentrates from environmental samples was accomplished by high-speed centrifugation and by filtration of the samples through positively charged depth filters. ...

journal_title：Applied and environmental microbiology

authors： Hejkal TW,Gerba CP,Rao VC

更新日期：1982-03-01 00:00:00

abstract：:Two types of mesophilic, methanogenic bacteria were isolated in pure culture from anaerobic freshwater and marine mud with 2-propanol as the hydrogen donor. The freshwater strain (SK) was a Methanospirillum species, the marine, salt-requiring strain (CV), which had irregular coccoid cells, resembled Methanogenium sp. ...

journal_title：Applied and environmental microbiology

authors： Widdel F

更新日期：1986-05-01 00:00:00

abstract：:Biolog's identification system was used to identify 39 American Type Culture Collection reference taxa and 45 gram-negative isolates from water samples. Of the reference strains, 98% were identified to genus level and 76% to species level within 4 to 24 h. Identification of some authentic strains of Enterobacter, Kl...

journal_title：Applied and environmental microbiology

authors： Klingler JM,Stowe RP,Obenhuber DC,Groves TO,Mishra SK,Pierson DL

更新日期：1992-06-01 00:00:00

abstract：:A simplified X-ray film method for detecting bacterial production of Hgo by Escherichia coli was developed. There was excellent agreement of results between this X-ray film method and radioactive mercury volatilization assays. Although not quantitative, the X-ray film method has the advantages of being rapid, simple t...

journal_title：Applied and environmental microbiology

authors： Nakamura K,Nakahara H

更新日期：1988-11-01 00:00:00

abstract：:Two different endoxylanases (1,4-beta-D-xylan xylanohydrolases, EC 3.2.1.8), designated 1 and 2, have been purified by column chromatography to apparent homogeneity from the nonsedimentable extracellular culture fluid of the strictly anaerobic, ruminal bacterium Fibrobacter succinogenes S85 grown on crystalline cellul...

journal_title：Applied and environmental microbiology

authors： Matte A,Forsberg CW

更新日期：1992-01-01 00:00:00

abstract：:Allozyme electrophoresis and restriction fragment length polymorphism (RFLP) analyses were used to examine the genetic diversity of a collection of 18 Rhizobium leguminosarum bv. trifolii, 1 R. leguminosarum bv. viciae, and 2 R. meliloti strains. Allozyme analysis at 28 loci revealed 16 electrophoretic types. The mean...

journal_title：Applied and environmental microbiology

authors： Demezas DH,Reardon TB,Watson JM,Gibson AH

更新日期：1991-12-01 00:00:00

abstract：:In growing cells of Saccharomyces cerevisiae and Saccharomyces carlsbergensis, T-2 toxin inhibits cell growth. We have examined the role of the yeast membranes in the uptake mechanism(s) of T-2 toxin. The effects of membrane-modulating agents, ethanol, cetyltrimethylammonium bromide, Triton X-100, and heat were studie...

journal_title：Applied and environmental microbiology

authors： Schappert KT,Khachatourians GG

更新日期：1984-04-01 00:00:00

abstract：:Lysostaphin (Lst) is a potent bacteriolytic enzyme that kills Staphylococcus aureus, a common bacterial pathogen of humans and animals. With high activity against both planktonic cells and biofilms, Lst has the potential to be used in industrial products, such as commercial cleansers, for decontamination. However, Lst...

journal_title：Applied and environmental microbiology

authors： Wu X,Kwon SJ,Kim D,Zha J,Mora-Pale M,Dordick JS

更新日期：2018-07-02 00:00:00

abstract：:Bacillus subtilis 5230 spores were lyophilized in 0.067 M phosphate buffer and stored at 2 to 8 degrees C for 9 to 27 months. The lyophilized spores were reconstituted with buffer or 0.9% saline, and the heat resistance was determined in a thermoresistometer. Lyophilization had no effect on the heat resistance of the ...

journal_title：Applied and environmental microbiology

authors： Odlaug TE,Caputo RA,Graham GS

更新日期：1981-06-01 00:00:00

abstract：:The transmission of Escherichia coli O157:H7 from manure-contaminated soil and irrigation water to lettuce plants was demonstrated using laser scanning confocal microscopy, epifluorescence microscopy, and recovery of viable cells from the inner tissues of plants. E. coli O157:H7 migrated to internal locations in plant...

journal_title：Applied and environmental microbiology

authors： Solomon EB,Yaron S,Matthews KR

更新日期：2002-01-01 00:00:00

abstract：:Aflatoxin B1 in a 5-micrograms/ml water solution was sensitive to ionizing radiation. Inactivation was assayed by the Ames microsome mutagenicity test and confirmed by thin-layer chromatography. Destruction of aflatoxin B1 had already begun at 2.5 kilograms (kGy; 1 kGy = 0.1 Mrad), but a dose exceeding 10 kGy was nece...

journal_title：Applied and environmental microbiology

authors： Van Dyck PJ,Tobback P,Feyes M,van de Voorde H

更新日期：1982-06-01 00:00:00

abstract：:We examined the bacterial communities of epilithic biofilms in 17 streams which represented a gradient ranging from relatively pristine streams to streams highly impacted by acid mine drainage (AMD). A combination of automated ribosomal intergenic spacer analysis with multivariate analysis and ordination provided a se...

journal_title：Applied and environmental microbiology

authors： Lear G,Niyogi D,Harding J,Dong Y,Lewis G

更新日期：2009-06-01 00:00:00

abstract：:A novel serine carboxypeptidase (EC 3.4.16.1) was found in an Aspergillus oryzae fermentation broth and was purified to homogeneity. This enzyme has a molecular weight of ca. 67,000, as determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and its specific activity is 21 U/mg for carbobenzoxy (Z)-Al...

journal_title：Applied and environmental microbiology

authors： Blinkovsky AM,Byun T,Brown KM,Golightly EJ

更新日期：1999-08-01 00:00:00

abstract：:Rapid population growth and urban development along waterways and coastal areas have led to decreasing water quality. To examine the effects of upstream anthropogenic activities on microbiological water quality, methods for source-specific testing are required. In this study, molecular assays targeting human enterovir...

journal_title：Applied and environmental microbiology

authors： Fong TT,Griffin DW,Lipp EK

更新日期：2005-04-01 00:00:00

abstract：:In order to elucidate interactions between sulfate reduction and dechlorination, we systematically evaluated the effects of different concentrations of sulfate and sulfide on reductive dechlorination by isolates, constructed consortia, and enrichments containing Dehalococcoides sp. Sulfate (up to 5 mM) did not inhibit...

journal_title：Applied and environmental microbiology

authors： Mao X,Polasko A,Alvarez-Cohen L

更新日期：2017-03-31 00:00:00

abstract：:Simultaneous production of penicillic acid and patulin by an atypical strain of Penicillium roqueforti isolated from cheddar cheese is reported. Mycotoxin production was confirmed by thin-layer and gas-liquid chromatography and by ultraviolet, infrared, and mass spectral analyses. Culture extracts were toxic to Bacill...

journal_title：Applied and environmental microbiology

authors： Olivigni FJ,Bullerman LB

更新日期：1978-02-01 00:00:00

abstract：:Enterohemorrhagic Escherichia coli O157:H7 has a natural reservoir in the intestinal tracts of cattle. Colonization is asymptomatic and transient, but it is not clear if protective immunity is induced. This study demonstrates that prior colonization induces humoral immune responses to bacterial antigens and reduces ba...

journal_title：Applied and environmental microbiology

authors： Naylor SW,Flockhart A,Nart P,Smith DG,Huntley J,Gally DL,Low JC

更新日期：2007-06-01 00:00:00

abstract：:During incubation of seawater in bottles, the decrease in dissolved oxygen is often nonlinear over time scales frequently used to measure respiration. Numbers of bacteria always increase, and rates of assimilation of dissolved leucine often increase exponentially. This suggests that sample handling disrupts the previo...

journal_title：Applied and environmental microbiology

authors： Pomeroy LR,Sheldon JE,Sheldon WM

更新日期：1994-01-01 00:00:00

abstract：:The beta-xylosidase-encoding xlnD gene of Aspergillus niger 90196 was amplified by the PCR technique from first-strand cDNA synthesized on mRNA isolated from the fungus. The nucleotide sequence of the cDNA fragment was verified to contain a 2,412-bp open reading frame that encodes a 804-amino-acid propeptide. The 778-...

journal_title：Applied and environmental microbiology

authors： La Grange DC,Pretorius IS,Claeyssens M,van Zyl WH

更新日期：2001-12-01 00:00:00

abstract：:The gut microbiota is a diverse and dynamic ecological community that is increasingly recognized to play important roles in host metabolic, immunological, and behavioral functioning. As such, identifying new routes for manipulating the microbiota may provide valuable additional methods for improving host health. Dieta...

journal_title：Applied and environmental microbiology

authors： Reese AT,Carmody RN

更新日期：2019-05-02 00:00:00

abstract：:At certain stages in its growth cycle, Methanosarcina mazei produces an enzyme (disaggregatase) that causes aggregates to separate into single cells. M. mazei S-6 and LYC both produce this enzymatic activity, although the specificities of activities differ. The disaggregatase of M. mazei S-6 had little effect on strai...

journal_title：Applied and environmental microbiology

authors： Xun LY,Mah RA,Boone DR

更新日期：1990-12-01 00:00:00

abstract：:Previous studies implicated loss of motility and mutations of the alsR and sigW regulatory genes in enhanced fitness of the Bacillus subtilis evolved strain WN716 over that of its ancestral strain WN624. The fitness of strains carrying knockout mutations alsR::spc, sigD::kan, and/or sigW::erm was measured and compared...

journal_title：Applied and environmental microbiology

authors： Nicholson WL

更新日期：2012-05-01 00:00:00

abstract：:Bacteroidales are attractive as water quality indicators because of their potential to discern sources of fecal pollution, and it is presumed that these bacteria do not multiply outside their host organisms. The persistence of a fecal Bacteroidales marker was monitored over 14 days in river water microcosms that varie...

journal_title：Applied and environmental microbiology

authors： Schulz CJ,Childers GW

更新日期：2011-04-01 00:00:00

abstract：:A tremorgenic mycotoxin was isolated from Penicillium paraherquei Abe ex G. Smith and identified as verruculogen. It was produced at the rate of approximately 1 mg/g of the dried fungal mycelium cultured on peptone-enriched Czapek-Dox medium at 28 degrees C. ...

journal_title：Applied and environmental microbiology

authors： Yoshizawa T,Morooka N,Sawada Y,Udagawa SI

更新日期：1976-09-01 00:00:00