Phase equilibria and thermodynamics: measurements

Komarek, K. L.; Ipser, Herbert

doi:10.1351/pac198456111511

Cited by 11 publications

(4 citation statements)

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“…C. raciborskii occurs as both coiled and straight trichomes (Komárek, 1985) and surveys of Australian waters indicate that both morphotypes can coexist (Baker and Humpage, 1994). It has been previously shown by rpoC1 gene analysis (Wilson et al, 2000) that all Cylindrospermopsis isolates examined in this study belong to the same species (i.e., C. raciborskii).…”

Section: Discussionmentioning

confidence: 99%

“…They are able to cause significant and potentially hazardous toxic blooms on the surface of water bodies, particularly under conditions of eutrophication. cooler, temperate climates (Komárek, 1985;Baker and Humpage, 1994;Kleinkauf and von Döhren, 1996). Blooms of this species have been found throughout Australia, Brazil, Europe and the USA.…”

Section: Introductionmentioning

confidence: 99%

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Identification of genes implicated in toxin production in the cyanobacterium Cylindrospermopsis raciborskii

Schembri

Neilan

Saint

2001

Environmental Toxicology

253

188

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Cylindrospermopsis raciborskii is a bloom-forming cyanobacterium found in both tropical and temperate climates which produces cylindrospermopsin, a potent hepatotoxic secondary metabolite. This organism is notorious for its association with a significant human poisoning incident on Palm Island, Australia, which resulted in the hospitalization of 148 people. We have screened 13 C. raciborskii isolates from various regions of Australia and shown that both toxic and nontoxic strains exist within this species. No association was observed between geographical origin and toxin production. Polyketide synthases (PKSs) and peptide synthetases (PSs) are enzymes involved in secondary metabolite biosynthesis in cyanobacteria. Putative PKS and PS genes from C. raciborskii strains AWT205 and CYP020B were identified by PCR using degenerate primers based on conserved regions within each gene. Examination of the strain-specific distribution of the PKS and PS genes in C. raciborskii isolates demonstrated a direct link between the presence of these two genes and the ability to produce cylindrospermopsin. Interestingly, the possession of these two genes was also linked. They were also identified in an Anabaena bergii isolate that was demonstrated to produce cylindrospermopsin. Taken together, these data suggest a likely role for these determinants in secondary metabolite and toxin production by C. raciborskii.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Identification of genes implicated in toxin production in the cyanobacterium Cylindrospermopsis raciborskii

Schembri

Neilan

Saint

2001

Environmental Toxicology

253

188

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“…Since my field is thermodynamics of inorganic metallic systems and thermodynamics does depend on the establishment of equilibrium, experimental techniques used for such measurements will -roughly speaking -be confined to the temperature regimen above 1000 K. In previous publications the author has quite extensively discussed experimental techniques applied in high temperature thermodynamics and phase diagram studies (Ref. [1][2][3][4][5]. Since then other general (e. g. Ref.…”

Section: Introductionmentioning

confidence: 99%

Experimental techniques in high temperature thermodynamics

Komarek¹

1992

Pure and Applied Chemistry

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-An overview of the most recent developments of experimental techniques used in high temperature thermodynamics will be given. Calorimetric, EMF, and vapor pressure methods will be discussed with special emphasis on solid electrolyte galvanic cell techniques and Knudsen effusion mass spectrometry.The essential criteria for the satisfactory application of solid electrolyte galvanic cell methods will be presented and the principal electrolytes presently in use will be surveyed. Special variations of the cell technique used in thermodynamic studies are described.With respect to vapor pressure methods the focus will be on the fundamentals of the Knudesen effusion mass spectrometry, Recent methodic developments were less due to radically new techniques but more to automated control, data acquisition and processing.

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“…Pendant les dix derni~res annres, de nombreux articles de revues concernant les mrthodes exprrimentales en thermodynamique chimique ont 6t6 publirs, notamment par Komarek [1][2][3][4][5][6]. , Spencer [8], Navrotsky [9], Predel [11,12], Bruzzone [13] et Hertz [14].…”

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Determination calorimetrique des enthalpies de formation en metallurgie

Castanet

1989

Journal of Thermal Analysis

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The calorimetric methods used for the measurement of the enthalpy of formation of metallic systems are described and discussed. Special attention is paid to direct reaction calorimetry, dissolution calorimetry, precipitation calorimetry, combustion calorimetry.., and nonreacting calorimetry is considered as an additiorial method from this point of view. Emphasis is placed on thei r particular field of application. Some recent developments are given.

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Phase equilibria and thermodynamics: measurements

Cited by 11 publications

References 11 publications

Identification of genes implicated in toxin production in the cyanobacterium Cylindrospermopsis raciborskii

Identification of genes implicated in toxin production in the cyanobacterium Cylindrospermopsis raciborskii

Experimental techniques in high temperature thermodynamics

Determination calorimetrique des enthalpies de formation en metallurgie

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