Abstract：
:Dense populations of anaerobic bacteria were found sequentially layered below the thermocline in two eutrophic lakes in southwest Michigan. Phase and electron microscopy of whole cells and thin sections were used to reveal the in situ morphology of the dominant members of the community. The predominant chlorophyll-containing bacteria were identified on the basis of their morphology to be members of the genera Pelodictyon, Prosthecochloris, Clathrochloris, Chlorochromatium, Pelochromatium, Thiopedia, Thiocystis, Thiospirillum, and Chromatium. The natural morphology of these organisms is described and compared with the morphology of reported isolates, the morphology of unisolated genera was compared with previous descriptions of natural samples. Most of the organisms near the sediment-water interface and two from the upper hypolimnion have not been previously described. They have been divided into six distinct groups based on morphology; the morphological features of each group are presented. This approach, based on the morphological uniqueness of the procaryotes present, provides a satisfactory method for grouping members of the hypolimnetic community for ecological studies.
journal_name
Can J Microbioljournal_title
Canadian journal of microbiologyauthors
Caldwell DE,Tiedje JMdoi
10.1139/m75-051subject
Has Abstractpub_date
1975-03-01 00:00:00pages
362-76issue
3eissn
0008-4166issn
1480-3275journal_volume
21pub_type
杂志文章abstract：:In mycetomes of leafhoppers, Helochara communis, ultrastructural and histochemical studies revealed that spheroplast symbiotes (t-symbiotes) were converted to 'a-symbiotes' (so-called), with apparent loss of DNA--a phenomenon reminiscent of rhizobium-bacteroid conversion in certain legume nodules. Additional t-symbiot...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m75-028
更新日期：1975-02-01 00:00:00
abstract：:Klebsiella pneumoniae was found to effect the reductive dechlorination of methoxychlor (2,2-bis(p-methoxyphenyl)-1, 1, 1-trichloroethane) and its dihydroxy derivative (2, 2-bis (p-hydroxyphenyl)-1, 1, 1-trichloroethane) to dichloro derivatives 2, 2-bis (p-methoxyphenyl)-1, 1-dichloroethane and 2, 2-bis (p-hydroxypheny...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m82-023
更新日期：1982-02-01 00:00:00
abstract：:The altitudinal distribution of microfungi associated with Betula ermanii Cham. leaf litter was investigated on Mt. Rishiri (1719 m), northern Japan. Fallen leaves were collected at five sites of different altitudes (approximately 300, 600, 900, 1200, and 1500 m above sea level) along a transect on the northern slope ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/w09-030
更新日期：2009-07-01 00:00:00
abstract：:Virus-like particles have been found in specific regions of the reproductive tracts of three different braconid wasps, all parasitoids of the tobacco budworm, Heliothis virescens. The particles are nuclear in origin, and Feulgen cytochemistry of particulate fluid in the calyx and oviducts of one species has revealed t...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m76-148
更新日期：1976-07-01 00:00:00
abstract：:Andosols comprise one of the most important soil groups for agricultural activities in Japan because they cover about 46.5% of arable upland fields. In this soil group, available phosphorus (P) is accumulated by application of excessive fertilizer, but little is known about the influence of increasing P availability o...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/cjm-2012-0612
更新日期：2013-06-01 00:00:00
abstract：:Marine shrimp of the species Penaeus monodon were collected from the coastal region (Haroa) of the deltaic Sundarbans of West Bengal, India during the premonsoon period in 1996. Klebsiella pneumoniae was isolated from the alimentary canal and gills of the shrimp as the sole isolate. All 10 isolated strains were resist...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：
更新日期：1998-02-01 00:00:00
abstract：:A total of 230 strains of metal-tolerant bacteria from water and sediment samples collected in Chesapeake Bay were isolated on a medium containing cobalt, lead, mercury, or molybdenum. In addition, a set of 71 cultures were simultaneously isolated on glucose tryptone yeast extract agar medium without metals. Twenty-th...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m77-212
更新日期：1977-10-01 00:00:00
abstract：:Pseudomonas aeruginosa establishes life-long chronic infections in the cystic fibrosis (CF) lung by utilizing various adaptation strategies. Some of these strategies include altering metabolic pathways to utilize readily available nutrients present in the host environment. The airway sputum contains various host-deriv...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/cjm-2014-0485
更新日期：2014-12-01 00:00:00
abstract：:Through genomic analysis of mucosa-associated Escherichia coli strains, we found a close genetic association among isolates from pediatric inflammatory bowel disease (IBD) patients. A specific E. coli pathovar, adherent-invasive E. coli (AIEC), was found in Crohn's disease (CD) adult patients - this pathovar has enhan...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/w2012-007
更新日期：2012-04-01 00:00:00
abstract：:Samples of seawater, sediment, and the following invertebrates were collected from the Mediterranean Sea in the neighborhood of Alexandria, Egypt: sea urchins (Echinus spp.), clams (Tapes spp.), and wedge shells (Donax trunculus). A total of 165 samples were collected from November 1979 to July 1980. Average counts (p...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m82-187
更新日期：1982-11-01 00:00:00
abstract：:Cells of five Bacteroides species were examined following treatment with homologous antisera and staining with ruthenium red. They were enveloped by glycocalyces and these extensive fibrous exopolysaccharide matrices were fully retained as an integral "capsule" by some cells, while other cells showed "capsule" as well...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m84-124
更新日期：1984-06-01 00:00:00
abstract：:The purpose of this study was to examine expression and regulation of 6 multidrug efflux systems, including MexAB-OprM, MexCD-OprJ, MexEF-OprN, MexXY, MexJK, and MexVW, in 13 non-cystic fibrosis (CF) clinical isolates of Pseudomonas aeruginosa. These isolates displayed a high level of resistance to many clinically imp...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/cjm-2014-0239
更新日期：2014-07-01 00:00:00
abstract：:Candida tropicalis synthesizes a hydroxylase (3 to 5 nmol of product formed per minute per milligram of protein) and a cytochrome P-450 (0.10 to 0.13 nmol per milligram of protein) during growth on n-tetradecane. A three- to four-fold increase in the level of NADPH cytochrome c reductase is also observed in those cell...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m79-031
更新日期：1979-02-01 00:00:00
abstract：:For the recently described serotype 15 of biotype I and serotypes 13 and 14 of biotype II of Actinobacillus pleuropneumoniae, fhuA and hgbA were detected by polymerase chain reaction and DNA sequencing. To determine the substrate specificity of the iron receptors FhuA and HgbA and to study their role in the virulence ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/w05-135
更新日期：2006-04-01 00:00:00
abstract：:Concentric bodies were found in vegetative and pycnidial cells of Podoxythium tricothecium and in ascostromal paraphyses of Rhytidhysterium rufulum, two representatives of the Loculoascomycetes. They averages 185 nm in diameter in P. trichothecium and 255 nm in R. rufulum and consisted of three zones. ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m77-218
更新日期：1977-10-01 00:00:00
abstract：:We present preliminary data on the role of antibiotics in intraabdominal sepsis using a new, clinically relevant animal model. Peritoneal cavity infection was induced by ligation and perforation of the cecum in adult rats. Surviving rats were randomized to receive either saline or cefoxitin at the time of cecal excisi...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m88-059
更新日期：1988-03-01 00:00:00
abstract：:Escherichia coli is capable of producing several virulence factors involved in the pathophysiology of bovine mastitis. Cell surface structures such as flagella, pili, and other outer membrane adhesins are considered essential for biofilm formation on abiotic surfaces. The aim of this study was characterize the molecul...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/cjm-2013-0053
更新日期：2013-05-01 00:00:00
abstract：:The aim of the present study was to examine soil samples from various vegetation zones in terms of physicochemical properties, microbial communities, and isolation and identification (by polymerase chain reaction and transmission electron microscopy) of bacteria producing poly-β-hydroxybutyrates (PHBs). Soil samples w...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/w2012-037
更新日期：2012-05-01 00:00:00
abstract：:Using a gene fusion approach, hybrid proteins were created by linking alkaline phosphatase (PhoA) or a cellulase reporter (delta CenA) to four large N-terminal portions of the Caulobacter crescentus surface (S)-layer protein (RsaA; 1026 amino acids). Three of the sites (amino acids 189, 220, 315) were selected on the ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m94-122
更新日期：1994-09-01 00:00:00
abstract：:Habitat fragmentation affects the biodiversity and function of aboveground organisms in natural ecosystems but has not been studied for effects on belowground species. In this paper, we consider the diversity of the rhizobia associated with the indigenous legume Dalea purpurea in 3 residual prairie areas in Minnesota ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/w04-107
更新日期：2005-01-01 00:00:00
abstract：:Acid (AcP) and alkaline phosphatase (AlP) were localized by physicobiochemical techniques. Greater than 53% of the phosphatases were detected, following sonication, in a low speed centrifugation pellet while osmotically shocked and spheroplasted Capnocytophaga species released only 9-28% and 11-43% of the cellular pho...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m83-212
更新日期：1983-10-01 00:00:00
abstract：:The deoxyribonucleic acid (DNA) of 36 isolates of Caryophanon latum and 3 isolates designated Caryophanon tenue, obtained from geographically diverse regions, has been examined for guanine plus cytosine (mol % G+C) base composition, genome size, and for relative reassociation levels. The isolates were found to be homo...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m76-195
更新日期：1976-09-01 00:00:00
abstract：:Polymyxin-resistant (PBLr) mutants of Agrobacterium tumefaciens A6, B6, and B6M were isolated from polymyxin-sensitive (PBLs) parent strains in a defined medium containing 600 microgram of polymyxin B sulfate per millilitre. The weight and number of tumors induced by PBLr mutants on a variety of host plants such as ca...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m79-029
更新日期：1979-02-01 00:00:00
abstract：:Farnesol, a quorum sensing (QS) signal, is produced by Candida albicans during high density growth and has been found to inhibit morphogenesis. This QS auto-inducing signal was discovered to increase amino acid incorporation by C. albicans when concentrations of farnesol increased to 10 microg/mL in yeast nitrogen bro...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/w05-050
更新日期：2005-08-01 00:00:00
abstract：:During shadowing, a "cap" of metal develops on small particles. This cap increases apparent particle with (measured normal to the shadowing direction) by an extent which cannot be predetermined. The extent of this increase in particle size (here defined as the "cap," X) is estimated in the present method by using oppo...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m85-114
更新日期：1985-07-01 00:00:00
abstract：:The aim of the present study was to explore a new approach based on the hemagglutination (HA) assay to understand the colonization ability of Shigella spp. To study colonization ability, an animal model of 4-day-old suckling mouse, was exploited. We characterized the HA activity of 48 Shigella strains, with erythroc...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/w2012-095
更新日期：2012-10-01 00:00:00
abstract：:Mice immunized subcutaneously with 10(6) viable yeast cells of Histoplasma capsulatum exhibited host protection to a challenge infection and also exhibited concomitant manifestations of cellular immunity to a culture filtrate antigen (yeast extract dialysate (YED)-histoplasmin). Protective immunity was determined by q...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m83-016
更新日期：1983-01-01 00:00:00
abstract：:A dairy product processing plant was studied for 2.5 years to examine contamination with Staphylococcus aureus and try to correlate the source of contamination. Cultures were submitted to an antibiotic susceptibility test (AST) and characterised by Pulsed-field Gel Electrophoresis (PFGE) analysis. Results showed that ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/w00-111
更新日期：2000-12-01 00:00:00
abstract：:In the past decade, the large tailings pond (Mildred Lake Settling Basin) on the Syncrude Canada Ltd. lease near Fort McMurray, Alta., has gone methanogenic. Currently, about 60%-80% of the flux of gas across the surface of the tailings pond is methane. As well as adding to greenhouse gas emissions, the production of ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：
更新日期：2000-10-01 00:00:00
abstract：:The mouse model of intraperitoneal sepsis with Proteus rettgeri was used to evaluate the anti-endotoxic effect of polymyxin B sulfate. An unexpected reversal of the usual protective effect of polymyxin in experimental enterobacterial sepsis was observed in which the lethality of the infection was enhanced. ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m80-039
更新日期：1980-02-01 00:00:00
