Lyophilization of rumen fluid for use in culture media.

Abstract:

:The supernatant from centrifugation at 1,000 x g of strained rumen fluid was lyophilized, and the residue and sublimate fractions were used to replace fresh rumen fluid in a complete roll tube medium for enumeration of total rumen bacteria. Most of the growth-supporting nutrients in fresh rumen fluid were found in the residue fraction. With one exception, no significant differences were found in total bacterial numbers either by roll tube or most-probable-number procedures when lyophilized rumen fluid residue was substituted for fresh rumen fluid. Lyophilized rumen fluid residue was stable for at least 5 months at room temperature. Rumen fluid supernatant from centrifugation at 1,000 x g had a mean density of 1.005 +/- 0.03 g/ml and contained 1.56% +/- 0.30% dry matter. On the basis of these values, 15.68 mg of lyophilized rumen fluid residue is equivalent to 1 ml of rumen fluid supernatant from centrifugation at 1,000 x g.

journal_name

Appl Environ Microbiol

authors

Dehority BA,Tirabasso PA

doi

10.1128/AEM.55.12.3237-3239.1989

subject

Has Abstract

pub_date

1989-12-01 00:00:00

pages

3237-9

issue

12

eissn

0099-2240

issn

1098-5336

journal_volume

55

pub_type

杂志文章
  • Modifying the Lantibiotic Mutacin 1140 for Increased Yield, Activity, and Stability.

    abstract::Mutacin 1140 belongs to the epidermin family of type AI lantibiotics. This family has a broad spectrum of activity against Gram-positive bacteria. The binding of mutacin 1140 to lipid II leads to the inhibition of cell wall synthesis. Pharmacokinetic experiments with type AI lantibiotics are generally discouraging for...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.00830-18

    authors: Geng M,Smith L

    更新日期:2018-07-17 00:00:00

  • Aromatic amino acid auxotrophs constructed by recombinant marker exchange in Methylophilus methylotrophus AS1 cells expressing the aroP-encoded transporter of Escherichia coli.

    abstract::The isolation of auxotrophic mutants, which is a prerequisite for a substantial genetic analysis and metabolic engineering of obligate methylotrophs, remains a rather complicated task. We describe a novel method of constructing mutants of the bacterium Methylophilus methylotrophus AS1 that are auxotrophic for aromatic...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.02217-09

    authors: Yomantas YA,Tokmakova IL,Gorshkova NV,Abalakina EG,Kazakova SM,Gak ER,Mashko SV

    更新日期:2010-01-01 00:00:00

  • A Modular, Tn7-Based System for Making Bioluminescent or Fluorescent Salmonella and Escherichia coli Strains.

    abstract:UNLABELLED:Our goal was to develop a robust tagging method that can be used to track bacterial strains in vivo To address this challenge, we adapted two existing systems: a modular plasmid-based reporter system (pCS26) that has been used for high-throughput gene expression studies in Salmonella and Escherichia coli and...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.01346-16

    authors: Shivak DJ,MacKenzie KD,Watson NL,Pasternak JA,Jones BD,Wang Y,DeVinney R,Wilson HL,Surette MG,White AP

    更新日期:2016-07-29 00:00:00

  • Field evaluation of a semiautomated method for rapid and simple analysis of recreational water microbiological quality.

    abstract::An early warning system using a rapid enzymatic semiautomated method suitable for fecal coliform detection in recreational waters within 8 h was developed further and evaluated in this study. This rapid method was compared to the standard method followed in the United Kingdom. We used 1,011 samples originating from 20...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/aem.66.10.4401-4407.2000

    authors: Anglès d'Auriac MB,Roberts H,Shaw T,Sirevåg R,Hermansen LF,Berg JD

    更新日期:2000-10-01 00:00:00

  • Propionate formation by Opitutus terrae in pure culture and in mixed culture with a hydrogenotrophic methanogen and implications for carbon fluxes in anoxic rice paddy soil.

    abstract::Propionate-forming bacteria seem to be abundant in anoxic rice paddy soil, but biogeochemical investigations show that propionate is not a correspondingly important intermediate in carbon flux in this system. Mixed cultures of Opitutus terrae strain PB90-1, a representative propionate-producing bacterium from rice pad...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/aem.68.4.2089-2092.2002

    authors: Chin KJ,Janssen PH

    更新日期:2002-04-01 00:00:00

  • Effects of Agricultural Management on Rhizosphere Microbial Structure and Function in Processing Tomato Plants.

    abstract::Agricultural management practices affect bulk soil microbial communities and the functions they carry out, but it remains unclear how these effects extend to the rhizosphere in different agroecosystem contexts. Given close linkages between rhizosphere processes and plant nutrition and productivity, understanding how m...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.01064-19

    authors: Schmidt JE,Vannette RL,Igwe A,Blundell R,Casteel CL,Gaudin ACM

    更新日期:2019-08-01 00:00:00

  • Biocide-Tolerant Listeria monocytogenes Isolates from German Food Production Plants Do Not Show Cross-Resistance to Clinically Relevant Antibiotics.

    abstract::Contamination of food during processing is recognized as a main transmission route of Listeria monocytogenes To prevent microbial contamination, biocides are widely applied as disinfectants in food processing plants. However, there are concerns about the development of antimicrobial resistance in foodborne pathogens d...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.01253-19

    authors: Roedel A,Dieckmann R,Brendebach H,Hammerl JA,Kleta S,Noll M,Al Dahouk S,Vincze S

    更新日期:2019-10-01 00:00:00

  • Transformation of Rhodococcus fascians by High-Voltage Electroporation and Development of R. fascians Cloning Vectors.

    abstract::The analysis of the virulence determinants of phytopathogenic Rhodococcus fascians has been hampered by the lack of a system for introducing exogenous DNA. We investigated the possibility of genetic transformation of R. fascians by high-voltage electroporation of intact bacterial cells in the presence of plasmid DNA. ...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.56.9.2818-2825.1990

    authors: Desomer J,Dhaese P,Montagu MV

    更新日期:1990-09-01 00:00:00

  • Functional screening and in vitro analysis reveal thioesterases with enhanced substrate specificity profiles that improve short-chain fatty acid production in Escherichia coli.

    abstract::Short-chain fatty acid (SCFA) biosynthesis is pertinent to production of biofuels, industrial compounds, and pharmaceuticals from renewable resources. To expand on Escherichia coli SCFA products, we previously implemented a coenzyme A (CoA)-dependent pathway that condenses acetyl-CoA to a diverse group of short-chain ...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.03303-13

    authors: McMahon MD,Prather KL

    更新日期:2014-02-01 00:00:00

  • Cloning and nucleotide sequence of a gene from Lactobacillus sake Lb706 necessary for sakacin A production and immunity.

    abstract::Sakacin A is an antilisterial bacteriocin produced by Lactobacillus sake Lb706. In order to identify genes involved in sakacin A production and immunity, the plasmid fraction of L. sake Lb706 was shotgun cloned directly into a sakacin A-nonproducing and -sensitive variant, L. sake Lb706-B, by using the broad-host-rang...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.59.9.2868-2875.1993

    authors: Axelsson L,Holck A,Birkeland SE,Aukrust T,Blom H

    更新日期:1993-09-01 00:00:00

  • A highly purified enrichment culture couples the reductive dechlorination of tetrachloroethene to growth.

    abstract::A microscopically pure enrichment culture of a gram-negative anaerobic bacterium, in the present article referred to as PER-K23, was isolated from an anaerobic packed-bed column in which tetrachloroethene (PCE) was reductively transformed to ethane via trichloroethene (TCE), cis-1,2-dichloroethene (cis-1,2-DCE), chlor...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.59.9.2991-2997.1993

    authors: Holliger C,Schraa G,Stams AJ,Zehnder AJ

    更新日期:1993-09-01 00:00:00

  • A sandwiched-culture technique for evaluation of heterologous protein production in a filamentous fungus.

    abstract::Aspergillus niger is known for its efficient excretion machinery. However, problems have often arisen in obtaining high amounts of heterologous proteins in the culture medium. Here we present a quick method using sandwiched colonies to evaluate transgenic strains for secretion of heterologous proteins. Expressing the ...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.65.5.2250-2252.1999

    authors: Asgeirsdóttir SA,Scholtmeijer K,Wessels JG

    更新日期:1999-05-01 00:00:00

  • Transgalactosylation in a water-solvent biphasic reaction system with beta-galactosidase displayed on the surfaces of Bacillus subtilis spores.

    abstract::The ever-increasing industrial demand for biocatalysis necessitates innovations in the preparation and stabilization of biocatalysts. In this study, we demonstrated that beta-galactosidase (beta-Gal) displayed on Bacillus spores by fusion to the spore coat proteins (CotG) may be used as a whole-cell immobilized biocat...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.01489-06

    authors: Kwon SJ,Jung HC,Pan JG

    更新日期:2007-04-01 00:00:00

  • Heat-stable proteases from psychrotrophic pseudomonads: comparison of immunological properties.

    abstract::A heat-stable extracellular protease from Pseudomonas fluorescens was purified by chromatography on a DEAE-cellulose column and gel filtration on a Sephadex G100 column. The homogeneous enzyme preparation was used to prepare antiserum in rabbits. The rabbit antiserum was used to study the antigenic relatedness of prot...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.46.1.6-12.1983

    authors: Jackman DM,Bartlett FM,Patel TR

    更新日期:1983-07-01 00:00:00

  • Distribution of virulence genes in clinical and environmental Vibrio cholerae strains in Bangladesh.

    abstract::Vibrio cholerae, an environmental organism, is a facultative human pathogen. Here, we report the virulence profiles, comprising 18 genetic markers, of 102 clinical and 692 environmental V. cholerae strains isolated in Bangladesh between March 2004 and January 2006, showing the variability of virulence determinants wit...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.01113-13

    authors: Hasan NA,Ceccarelli D,Grim CJ,Taviani E,Choi J,Sadique A,Alam M,Siddique AK,Sack RB,Huq A,Colwell RR

    更新日期:2013-09-01 00:00:00

  • DbdR, a New Member of the LysR Family of Transcriptional Regulators, Coordinately Controls Four Promoters in the Thauera aromatica AR-1 3,5-Dihydroxybenzoate Anaerobic Degradation Pathway.

    abstract::The facultative anaerobe Thauera aromatica strain AR-1 uses 3,5-dihydroxybenzoate (3,5-DHB) as a sole carbon and energy source under anoxic conditions using an unusual oxidative strategy to overcome aromatic ring stability. A 25-kb gene cluster organized in four main operons encodes the anaerobic degradation pathway f...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.02295-18

    authors: Pacheco-Sánchez D,Molina-Fuentes Á,Marín P,Díaz-Romero A,Marqués S

    更新日期:2019-01-09 00:00:00

  • Mycotoxins produced from fungi isolated from foodstuffs and soil: comparison of toxicity in fibroblasts and rat feeding tests.

    abstract::Thirty-nine isolates of fungi obtained from foodstuffs and soil samples from various parts of the world have been identified. The isolates were grown on a solid rice medium, and extracts were prepared with 50% aqueous methanol. The extracts were examined for toxicity in the following systems: (i) cytotoxicity to cultu...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.48.3.654-661.1984

    authors: Abbas HK,Mirocha CJ,Shier WT

    更新日期:1984-09-01 00:00:00

  • Selection of Pseudomonas sp. strain HBP1 Prp for metabolism of 2-propylphenol and elucidation of the degradative pathway.

    abstract::A mutant of Pseudomonas sp. strain HBP1, originally isolated on 2-hydroxybiphenyl, was selected for the ability to grow on 2-propylphenol as the sole carbon and energy source. In the mutant strain, which was designated as Pseudomonas sp. strain HBP1 Prp, the cellular induction mechanism involved in the synthesis of th...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.59.3.860-866.1993

    authors: Kohler HP,van der Maarel MJ,Kohler-Staub D

    更新日期:1993-03-01 00:00:00

  • Possible role of streptomycin released from spore cell wall of Streptomyces griseus.

    abstract::Vegetative mycelia and spores of the investigated high- and low-producer strains of Streptomyces griseus bound significant amounts (4%) of streptomycin, which could be removed by increasing ionic strength. The release of antibiotic from the spores was easier when the spores were germinating. This phenomenon is conside...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.50.2.438-440.1985

    authors: Szabó I,Benedek A,Barabás G

    更新日期:1985-08-01 00:00:00

  • Survey of sensitivity of twelve yeast genera toward T-2 toxin.

    abstract::A survey was made to detect the sensitivity of 12 yeast genera to T-2 toxin. Seventy-five yeasts isolated from various sources were tested for their susceptibility to T-2 toxin. The MIC of T-2 for these yeasts varied from 1.0 to greater than 8.0 micrograms/ml. Of the yeasts studied, Kluyveromyces fragilis showed the g...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.48.2.416-419.1984

    authors: Sukroongreung S,Schappert KT,Khachatourians GG

    更新日期:1984-08-01 00:00:00

  • Microbial population changes during bioremediation of an experimental oil spill.

    abstract::Three crude oil bioremediation techniques were applied in a randomized block field experiment simulating a coastal oil spill. Four treatments (no oil control, oil alone, oil plus nutrients, and oil plus nutrients plus an indigenous inoculum) were applied. In situ microbial community structures were monitored by phosph...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.65.8.3566-3574.1999

    authors: MacNaughton SJ,Stephen JR,Venosa AD,Davis GA,Chang YJ,White DC

    更新日期:1999-08-01 00:00:00

  • Identification and characterization of a novel flagellum-dependent Salmonella-infecting bacteriophage, iEPS5.

    abstract::A novel flagellatropic phage of Salmonella enterica serovar Typhimurium, called iEPS5, was isolated and characterized. iEPS5 has an icosahedral head and a long noncontractile tail with a tail fiber. Genome sequencing revealed a double-stranded DNA of 59,254 bp having 73 open reading frames (ORFs). To identify the rece...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.00706-13

    authors: Choi Y,Shin H,Lee JH,Ryu S

    更新日期:2013-08-01 00:00:00

  • Se(VI) reduction and the precipitation of Se(0) by the facultative bacterium Enterobacter cloacae SLD1a-1 are regulated by FNR.

    abstract::The fate of selenium in the environment is controlled, in part, by microbial selenium oxyanion reduction and Se(0) precipitation. In this study, we identified a genetic regulator that controls selenate reductase activity in the Se-reducing bacterium Enterobacter cloacae SLD1a-1. Heterologous expression of the global a...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.02542-06

    authors: Yee N,Ma J,Dalia A,Boonfueng T,Kobayashi DY

    更新日期:2007-03-01 00:00:00

  • Typing Listeria monocytogenes isolates from fish products and human listeriosis cases.

    abstract::Seventy-two Listeria monocytogenes isolates originating from 10 different fish products of 12 producers and 47 isolates from human listeriosis cases were typed by serotyping and multilocus enzyme electrophoresis. Seventy-five of these isolates were further subtyped by restriction analysis of genomic DNA with the enzym...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.63.4.1338-1343.1997

    authors: Boerlin P,Boerlin-Petzold F,Bannerman E,Bille J,Jemmi T

    更新日期:1997-04-01 00:00:00

  • Fecal Microbiotas of Indonesian and New Zealand Children Differ in Complexity and Bifidobacterial Taxa during the First Year of Life.

    abstract::The biological succession that occurs during the first year of life in the gut of infants in Western countries is broadly predictable in terms of the increasing complexity of the composition of microbiotas. Less information is available about microbiotas in Asian countries, where environmental, nutritional, and cultur...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.01105-19

    authors: Lawley B,Otal A,Moloney-Geany K,Diana A,Houghton L,Heath AM,Taylor RW,Tannock GW

    更新日期:2019-09-17 00:00:00

  • Development of a random amplification of polymorphic DNA typing method for Listeria monocytogenes.

    abstract::The 10-mer primer OPM-01 (5'-GTT GGT GGC T-3') was used to generate random amplification of polymorphic DNA (RAPD) profiles by polymerase chain reaction for 91 strains of Listeria monocytogenes from raw milk, food, and veterinary, medical, and food-environmental sources. The profiles obtained contained 1 to 10 bands w...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.59.9.3117-3119.1993

    authors: Lawrence LM,Harvey J,Gilmour A

    更新日期:1993-09-01 00:00:00

  • Microplate assay for colletotrichum spore production.

    abstract::A simple microplate method was devised to assay spore production by Colletotrichum gloeosporioides by growing the fungus on 1 ml of solid media in the wells of tissue culture plates. Growth and sporulation on microplates were compared at days 4 and 8 with growth and sporulation in 100-ml liquid batch cultures that inv...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.53.4.627-632.1987

    authors: Slade SJ,Harris RF,Smith CS,Andrews JH,Nordheim EV

    更新日期:1987-04-01 00:00:00

  • Use of Two-Dimensional Polyacrylamide Electrophoresis to Demonstrate that Putative Rhizobium Cross-Inoculation Mutants Actually Are Contaminants.

    abstract::Two-dimensional polyacrylamide electrophoresis was used to determine that mutants of Rhizobium trifolii DT6, claimed to be capable of effectively nodulating soybeans, were actually Rhizobium japonicum 110 contaminants isolated from the parent DT6 culture. ...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.39.2.460-462.1980

    authors: Leps WT,Roberts GP,Brill WJ

    更新日期:1980-02-01 00:00:00

  • Effects of Bradyrhizobium japonicum and Soybean (Glycine max (L.) Merr.) Phosphorus Nutrition on Nodulation and Dinitrogen Fixation.

    abstract::Cells of Bradyrhizobium japonicum were grown in media containing either 1.0 mM or 0.5 muM phosphorus. In growth pouch experiments, infection of the primary root of soybean (Glycine max (L.) Merr.) by B. japonicum USDA 31, 110, and 142 was significantly delayed when P-limited cells were applied to the root. In a greenh...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.54.10.2387-2392.1988

    authors: Mullen MD,Israel DW,Wollum AG

    更新日期:1988-10-01 00:00:00

  • Production of recombinant beta-hexosaminidase A, a potential enzyme for replacement therapy for Tay-Sachs and Sandhoff diseases, in the methylotrophic yeast Ogataea minuta.

    abstract::Human beta-hexosaminidase A (HexA) is a heterodimeric glycoprotein composed of alpha- and beta-subunits that degrades GM2 gangliosides in lysosomes. GM2 gangliosidosis is a lysosomal storage disease in which an inherited deficiency of HexA causes the accumulation of GM2 gangliosides. In order to prepare a large amount...

    journal_title:Applied and environmental microbiology

    pub_type: 杂志文章

    doi:10.1128/AEM.00463-07

    authors: Akeboshi H,Chiba Y,Kasahara Y,Takashiba M,Takaoka Y,Ohsawa M,Tajima Y,Kawashima I,Tsuji D,Itoh K,Sakuraba H,Jigami Y

    更新日期:2007-08-01 00:00:00