Comparison of culturable fecal coliforms and Escherichia coli enumeration in freshwaters.

abstract：:Penicillium chrysogenum F1 is very efficient in bioleaching heavy metals from the soil and is used for that purpose. We found that F1 can extract 19.8 mg Cd, Cu, Pb, and Zn from 2.5 g soil; the total heavy metals' bioleaching ratio was 60.4%. In this study, the bioleaching mechanism was investigated by means of metabo...

journal_title：Canadian journal of microbiology

authors： Deng X,Yang Z,Chen R

更新日期：2019-09-01 00:00:00

abstract：:Many studies on quorum quenching focus on the discovery and characterization of novel acyl-homoserine lactonases (AHL-lactonases) because these enzymes could be used in the control of diseases caused by Gram-negative bacteria. The effects of quorum quenching are also remarkable in the performance of bacterial consorti...

journal_title：Canadian journal of microbiology

authors： Gómez-Garzón C,Dussán J

更新日期：2017-01-01 00:00:00

abstract：:The susceptibility of congenitally immunodeficient mice to a nonencapsulated strain of Cryptococcus neoformans (strain M7) was evaluated. Gnotobiotic mice with defined congenital defects in innate immunity (beige) or cell-mediated immunity (athymic) or with combined defects in innate and cellular immunity (beige athym...

journal_title：Canadian journal of microbiology

authors： Salkowski CA,Balish E

更新日期：1991-11-01 00:00:00

abstract：:Two-dimensional (2-D) polyacrylamide gel electrophoresis was used to detect proteins induced in Frankia sp. strain ACN14a-tsr by root exudates of its symbiotic host, Alnus glutinosa. The 5 most prominent proteins were purified from 2-D gels and characterized by N-terminal sequencing. All of these proteins had a high p...

journal_title：Canadian journal of microbiology

authors： Hammad Y,Maréchal J,Cournoyer B,Normand P,Domenach AM

更新日期：2001-06-01 00:00:00

abstract：:Plant secondary metabolites, such as saponins, have a considerable impact in agriculture because of their allelopathic effects. They also affect the growth of soil microorganisms, especially fungi. We investigated the influence of saponins on rhizosphere bacteria in vitro and in soil conditions. The effects of gypsoph...

journal_title：Canadian journal of microbiology

authors： Fons F,Amellal N,Leyval C,Saint-Martin N,Henry M

更新日期：2003-06-01 00:00:00

abstract：:The regulation of de novo pyrimidine biosynthesis in Pseudomonas putida ATCC 17536 by pyrimidines was explored. The pathway enzyme activities were higher in glucose-grown cells than in succinate-grown cells, indicating catabolite repression by succinate. In P. putida cells grown on succinate as a carbon source, only a...

journal_title：Canadian journal of microbiology

authors： Santiago MF,West TP

更新日期：2002-12-01 00:00:00

abstract：:The effect of fructans on the cultivable faecal community of Bio Breeding rats fed diets containing 5% (m/v) food-grade fructooligosaccharide (FOS) was investigated. Culturing of faecal material using chicory inulin as the sole carbohydrate source revealed the presence of a greater diversity of inulin-utilizing bacter...

journal_title：Canadian journal of microbiology

authors： Gourgue-Jeannot C,Kalmokoff ML,Kheradpir E,Kwan J,Lampi BJ,McAllister M,Brooks SP

更新日期：2006-10-01 00:00:00

abstract：:Natural enrichments of magnetotactic bacteria were used to study the sites where heavy metals accumulate in uncultured bacteria. Most bacteria obtained by magnetic concentration from these enrichments contained, in addition to the magnetosomes, large phosphorus-rich granules in the cytoplasm. Metal (Zn, Mn, Sr, Cd, Al...

journal_title：Canadian journal of microbiology

authors： Keim CN,Lins U,Farina M

更新日期：2001-12-01 00:00:00

abstract：:DNA-degrading activity from anaerobic samples of bovine ruminal fluid, primary anaerobic digestor wastewater, freshwater sediments, and marine sediments was observed in the presence of 5 mM EDTA. Nuclease activity experiments involved exposing salmon chromosomal DNA to the environmental samples in 50 mM pH 7.2 buffer,...

journal_title：Canadian journal of microbiology

authors： Ruiz TR,Andrews S,Smith GB

更新日期：2000-08-01 00:00:00

abstract：:Screening for mycotoxin production by Chaetomium spp. and related fungi on rice culture was conducted by a combination of cytotoxicity tests using HeLa cells and thin-layer chromatography. Producers of sterigmatocystin, O-methylsterigmatocystin, chaetochromin, chaetocin, chetomin, cochliodinols, and mollicellin G were...

journal_title：Canadian journal of microbiology

authors： Sekita S,Yoshihira K,Natori S,Udagawa S,Muroi T,Sugiyama Y,Kurata H,Umeda M

更新日期：1981-08-01 00:00:00

abstract：:The correlation between the occurrence of indicator organisms and salmonellae in the same sample homogenate of various classes of dried foods was studied. In the first phase of the work involving 5837 samples, 1943 contained fecal coliforms and 100 contained Salmonella. Fecal coliforms were not detected in 53 of the S...

journal_title：Canadian journal of microbiology

authors： Silliker JH,Gabis DA

更新日期：1976-07-01 00:00:00

abstract：:Isolated toluene-degrading Pseudomonas stutzeri ST-9 bacteria were grown in a minimal medium containing toluene (100 mg·L(-1)) (MMT) or glucose (MMG) as the sole carbon source, with specific growth rates of 0.019 h(-1) and 0.042 h(-1), respectively. Scanning (SEM) as well as transmission (TEM) electron microscope anal...

journal_title：Canadian journal of microbiology

authors： Michael E,Nitzan Y,Langzam Y,Luboshits G,Cahan R

更新日期：2016-08-01 00:00:00

abstract：:A simplified procedure is presented for releasing and concentrating indigenous microbial cells from soil for viewing by transmission electron microscopy as thin sections or replicas of frozen-etched preparations. This procedure is compared with two others reported earlier, and their relative merits are discussed as co...

journal_title：Canadian journal of microbiology

authors： Balkwill DL,Labeda DP,Casida LE Jr

更新日期：1975-03-01 00:00:00

abstract：:Subtyping Neisseria meningitidis by methods that rely on monoclonal antibody (mAb) reactivity results in an unusually high number of strains that are not subtypeable. To subtype 48 strains isolated (1993-1994) in the province of Quebec that were not subtypeable by mAb-based techniques, we used DNA sequencing of the va...

journal_title：Canadian journal of microbiology

authors： Arhin FF,Moreau F,Coulton JW,Mills EL

更新日期：1998-01-01 00:00:00

abstract：:Addition of Tween 80 to a 1.5% solution of beef extract was found to enhance the elution of bacteriophages adsorbed to electronegative filters. When reconcentration of the eluate was attempted by ammonium sulfate precipitation, a floating layer containing most of the viruses was formed. This floating layer can be obta...

journal_title：Canadian journal of microbiology

authors： Armon R,Arella M,Payment P

更新日期：1988-05-01 00:00:00

abstract：:One of the important properties of probiotics is the ability to survive in the intestine. There have been few studies on the probiotic property of lactococci, since they are formally not considered to be natural inhabitants of the intestine. To evaluate lactococci as probiotic bacteria, we investigated their ability t...

journal_title：Canadian journal of microbiology

authors： Kimoto H,Nomura M,Kobayashi M,Mizumachi K,Okamoto T

更新日期：2003-11-01 00:00:00

abstract：:Two rod-shaped viruses of similar length occurring in hops were isolated from a mixed infection. One (hop mosaic virus) infected Nicotiana clevelandii, produced mosaic symptoms in mosaic-sensitive hop cultivars, and did not infect Chenopodium murale. The other (hop latent virus) infected C. murale but not N. cleveland...

journal_title：Canadian journal of microbiology

authors： Probasco EG,Skotland CB

更新日期：1976-08-01 00:00:00

abstract：:Investigations of microbial diversity in Antarctic are important to begin to understand ecosystem functioning and decomposition processes. This study documents fungi at 9 historic sites on the Antarctic Peninsula collected from wooden structures, other organic materials, and soils during a joint National Science Found...

journal_title：Canadian journal of microbiology

authors： Arenz BE,Blanchette RA

更新日期：2009-01-01 00:00:00

abstract：:Soil bacteria that utilize inositol hexaphosphate (IHP) were isolated from a range of soils using defined selection media. An analysis of 200 randomly selected isolates indicated that less than 0.5% of the culturable population of soil bacteria were capable of using IHP as a sole source of C and P. From a further 238 ...

journal_title：Canadian journal of microbiology

authors： Richardson AE,Hadobas PA

更新日期：1997-06-01 00:00:00

abstract：:A tryptophan auxotroph of aerobically grown Rodospirillum rubrum was isolated after mutagenesis and replica plating. The mutant grows on tryptophan or indole, accumulates indole glycerol phosphate, lacks the capacity to convert indole glycerol phosphate to indole glycerol phosphate to indole, and finally is defective ...

journal_title：Canadian journal of microbiology

authors： Beuchemin-Newhouse N,Cedergen RJ

更新日期：1978-03-01 00:00:00

abstract：:An endo-beta-1,4-xylanase gene was cloned from Neocallimastix patriciarum 27 in the bacteriophage vector lambda gtWES lambda B and was subcloned into the plasmid vectors pUC18 and pUC19 in which xylanase activity was expressed in both orientations. The xylanase was located in the periplasmic space of the host, Escheri...

journal_title：Canadian journal of microbiology

authors： Lee JM,Hu Y,Zhu H,Cheng KJ,Krell PJ,Forsberg CW

更新日期：1993-01-01 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

authors： Silva VO,Espeschit IF,Moreira MA

更新日期：2013-05-01 00:00:00

abstract：:Pili are essential adhesive determinants for many bacterial pathogens. A suppressor mutation screen that takes advantage of a pilus-mediated self-aggregative "hockey-puck" colony phenotype was designed to identify novel regulators of type I pili in Serratia marcescens. Mutations that decreased pilus biosynthesis mappe...

journal_title：Canadian journal of microbiology

authors： Shanks RM,Stella NA,Brothers KM,Polaski DM

更新日期：2016-01-01 00:00:00

abstract：:A visual micromethod for measuring antifungal effects on germination and growth is described. The antifungal agent griseofulvin and the fungus Trichophyton mentagrophytes were used as materials to compare the micromethod with a standard assay based on dry mycelial weight. The micromethod was more sensitive than the we...

journal_title：Canadian journal of microbiology

authors： Kerbs S,Hutton RD,Hollister JW

更新日期：1978-05-01 00:00:00

abstract：:Fifty-two killer, factor-resistant, nuclear mutants were isolated from sensitive strains of yeast and assorted into three functional groups. All but one mutant owed their resistance to an alteration in the cell wall binding site for killer. In several mutant strains, an alteration at the site of killer binding was ass...

journal_title：Canadian journal of microbiology

authors： Al-Aidroos K,Bussey H

更新日期：1978-03-01 00:00:00

abstract：:We continued our study of high-molecular-mass proteases (HMMPs) using several strains of the genus Trichoderma, and other filamentous fungi (Botrytis cinerea, Aspergillus niger, Fusarium culmorum, and Penicillium purpurogenum). We found that five Trichoderma strains secreted HMMPs into the media after induction with b...

journal_title：Canadian journal of microbiology

authors： Mat'at'a M,Galádová H,Varečka L,Šimkovič M

更新日期：2019-09-01 00:00:00

abstract：:In this work, we assayed the ability of newly prepared indolizine derivates (epimers) 6C and 6A to inhibit the growth of Mycobacterium smegmatis and used them for resistance induction. 6A inhibited the growth of M. smegmatis at a concentration of 100 μg/mL. No inhibitory effect was observed in the presence of 6C. By i...

journal_title：Canadian journal of microbiology

authors： Olejníková P,Kurucová M,Švorc L,Marchalín Š

更新日期：2013-02-01 00:00:00

abstract：:The objective of the present work was to evaluate the relevance of the 2-methylcitric acid cycle (2MCC) to the catabolism of propionate in Burkholderia sacchari. Two B. sacchari mutants unable to grow on propionate were obtained: one disrupted in acnM, and the other in acnM and prpC deleted. An operative 2MCC signific...

journal_title：Canadian journal of microbiology

authors： Pereira EM,Silva-Queiroz SR,Cabrera Gomez JG,Silva LF

更新日期：2009-06-01 00:00:00

abstract：:Ten bacterial strains were isolated by enrichment culture, using as carbon sources either aliphatics or an aromatic-polar mixture. Oxygen uptake rate was used as a criterion to determine culture transfer timing at each enrichment stage. Biodegradation of aliphatics (10,000 mg L(-1)) and an aromatic-polar mixture (5000...

journal_title：Canadian journal of microbiology

authors： Díaz-Ramírez IJ,Ramírez-Saad H,Gutiérrez-Rojas M,Favela-Torres E

更新日期：2003-12-01 00:00:00

abstract：:The oligosaccharides of human lactoferrin were enzymatically removed with glycopeptidase F, resulting in a preparation containing partial and fully deglycosylated human lactoferrin. The derivatives were separated by Concanavalin A affinity chromatography and compared with native human lactoferrin with respect to their...

journal_title：Canadian journal of microbiology

authors： Alcantara J,Padda JS,Schryvers AB

更新日期：1992-11-01 00:00:00