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  • 1
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4839 | 1256 | 2011-09-29 15:49:48 | 4839 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: The purpose of this work is a contribution to the quantitative record of the use of iron by planktonic algae. Preliminary experiments with Chlorella to determine the rate of iron intake in the presence of inorganic sources of iron did not produce the desired result. The crucial point of this work is the investigation of the influence of various external factors on the stability of FeEDTA (FeEDTA = Ferric(III)-compound of ethylene-diamine tetra-acetic acid), since this compound appears to be particularly well-suited as a source of iron for planktonic algae (e.g. TAMIYA et al. 1953). Cultures of Chlorella fusca in a light thermostat were used in experimental research. Methods and results are discussed.
    Description: Translated from German into English
    Keywords: Chemistry ; Ecology ; Limnology ; Biometrics ; Biological sampling ; Geographical distribution ; Population density ; Population characteristics ; Population number ; Freshwater crustaceans ; Population dynamics
    Repository Name: AquaDocs
    Type: monograph
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  • 2
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4843 | 1256 | 2011-09-29 15:49:28 | 4843 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: The reaction of Mn(II) with water-dissolved oxygen, to a higher manganese hydroxide in an alkaline medium, as with the longstanding classic Winkler method, is the first step in the method described here. The assumption for faultless results by the conventional and modified Winkler method is clean water, which contains no organic substances by Mn(III) or Mn(IV). In many cases, however, eg. in river and lake-water tests, it can be seen with the naked eye that after some time the originally brown-coloured precipitate of manganese hydroxide becomes more and more colourless. Oxygen content was analysed in the water samples and evaluated by raising the amount of the leuko-base and giving the corresponding dilution of the colouring matter solution formed still higher oxygen contents can be measured.
    Description: Translated from German into English
    Keywords: Chemistry ; Ecology ; Limnology ; Methodology ; Experimental research ; Dissolved oxygen ; Analytical techniques ; Water analysis
    Repository Name: AquaDocs
    Type: monograph
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  • 3
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4848 | 1256 | 2011-09-29 15:49:18 | 4848 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: When dissolved in water, compounds of nitrogen and phosphorus ought to contain the basic assimilated food requirements for autotrophic plants and therefore autotrophic algae. This article summarises the occurrence of nitrogen in water, how species of algae utilize nitrogen and phosphorus forms for growth and the capacities of algae to adapt to environments of different nutrient wealth. This topic has unquestionable importance not only for the purpose of survival of a species but also in deciding indirectly about the stability of ecosystems.
    Description: Translated from Polish into English
    Keywords: Biology ; Chemistry ; Limnology ; Algae ; Nitrogen fixation ; Nitrogen ; Phosphorus ; Nutritional requirements ; Bacteria ; Organic compounds
    Repository Name: AquaDocs
    Type: monograph
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  • 4
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4856 | 1256 | 2011-09-29 15:48:26 | 4856 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: Pseudomonas aeruginosa has for some time been known as a denitrifier. Pseudomonas aeruginosa was chosen for further studies, because P. aeruginosa occurs abundantly in Plusssee and moreover there are contradictory assertions on the gas products of denitrification by this bacteria. In experimental research the pattern of growth and gas production of Pseudomonas aeruginosa on nutrient broth was studied.
    Description: Translated from German into English
    Keywords: Chemistry ; Ecology ; Limnology ; Experimental research ; Bacteria ; Freshwater lakes ; Growth ; Microbiological culture ; Plusssee
    Repository Name: AquaDocs
    Type: monograph
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  • 5
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4857 | 1256 | 2011-09-29 15:48:28 | 4857 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: There is no doubt that determination of the biomass of zooplankton (primarily of crustaceans) will be taken into consideration in practice and limnological works, especially after the recent publication of fairly comprehensive tables of weights of a whole range of species of freshwater copepods and cladocerans. The usefulness of applying formulae of determining the biomass of marine crustaceans for freshwater copepods is discussed.
    Description: Translated from Russian into English
    Keywords: Chemistry ; Ecology ; Limnology ; Freshwater crustaceans ; Zooplankton ; Biomass ; Formulae
    Repository Name: AquaDocs
    Type: monograph
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  • 6
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4877 | 1256 | 2011-09-29 15:47:02 | 4877 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: The determination of bi- and trivalent iron in proximity, in mineral waters has gained in significance, on biological and technical grounds. This short paper describes the procedure of the determination of bivalent iron and total iron in a water sample.
    Description: Translated from German into English
    Keywords: Chemistry ; Limnology ; Iron ; Acids ; Analytical techniques ; Minerals ; Water analysis
    Repository Name: AquaDocs
    Type: monograph
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  • 7
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4964 | 1256 | 2011-09-29 15:39:04 | 4964 | Freshwater Biological Association
    Publication Date: 2021-07-07
    Description: The nitrification in the ocean is influenced by several environmental factors and the importance of these is more or less known. There are very likely many more to be discovered in the study of the interaction of nitrification bacteria and other micro-organisms in the ocean. Some of the factors to be considered will briefly be dealt with in this paper. Then the authors give the results of an incubation experiment in the Baltic Sea and from a detailed study in Gullmarn.
    Description: Translated from Swedish into English
    Keywords: Chemistry ; Ecology ; Oceanography ; Marine ecology ; Nitrification ; Experimental research ; Sediment analysis ; Bacteria ; Carbon fixation ; Nitrosococcus oceanus ; Nitrococcus mobilis
    Repository Name: AquaDocs
    Type: monograph
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  • 8
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4967 | 1256 | 2011-09-29 15:36:52 | 4967 | Freshwater Biological Association
    Publication Date: 2021-07-07
    Description: Utilization of the heavy isotope of nitrogen as a tracer has found numerous applications in soil biology. It allows better definition of different stages of the nitrogen cycle, in particular the immobilization-mineralization cycle. In this work, the authors report the results of calculations of natural isotope ratios of nitrogen in samples of water, soil and vegetation prevailing in Dombes and discuss the possibilities of errors and coefficients of fractionation.
    Description: Translated from French into English
    Keywords: Chemistry ; Ecology ; Limnology ; Nitrogen isotopes ; Soils ; Tracers ; Bacteria ; Nitrogen compounds ; France ; Dombes
    Repository Name: AquaDocs
    Type: monograph
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  • 9
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4963 | 1256 | 2011-09-29 15:39:01 | 4963 | Freshwater Biological Association
    Publication Date: 2021-07-07
    Description: This short translation summarises experiments on the production of a highly dispersible precipitate of calcium carbonate. The translation covers the 'Experimental section' (of the original larger paper) only.
    Description: Translated from Polish into English
    Keywords: Chemistry ; Limnology ; Experimental research ; Calcium carbonates ; Magnetic fields ; Ultrasonic devices
    Repository Name: AquaDocs
    Type: monograph
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  • 10
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4988 | 1256 | 2011-09-29 15:36:31 | 4988 | Freshwater Biological Association
    Publication Date: 2021-07-07
    Description: This abbreviated translation summarises the chemical composition of Iraq water resources. Among the described water bodies are the River Euphrates, Shatt al Arab River and a number of standing waters.
    Description: Translated from Russian into English
    Keywords: Chemistry ; Ecology ; Limnology ; Inland water environment ; Inland waters ; Water analysis ; Iraq
    Repository Name: AquaDocs
    Type: monograph
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