scholarly journals Mathematical modeling of Microcystis aeruginosa growth and [D-Leu1] microcystin-LR production in culture media at different temperatures

Harmful Algae ◽  
2017 ◽  
Vol 67 ◽  
pp. 13-25 ◽  
Author(s):  
Crettaz Minaglia Melina Celeste ◽  
Rosso Lorena ◽  
Aranda Jorge Oswaldo ◽  
Goñi Sandro ◽  
Sedan Daniela ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Microcystis Aeruginosa ◽  
Culture Media ◽  
Different Temperatures

Effects of glyphosate on microcystin-LR production and release from Microcystis aeruginosa at different temperatures

2020 ◽  
Vol 27 (33) ◽  
pp. 41961-41969
Author(s):  
Jing Ye ◽  
Ying Guan ◽  
Liang Wu ◽  
Chunhui Wang ◽  
Jiawen Chen ◽  
...  
Keyword(s):  
Microcystis Aeruginosa ◽  
Different Temperatures

Mathematical modeling of a cryogenic jet pump with flows of different temperatures

1990 ◽  
Vol 26 (1) ◽  
pp. 18-22
Author(s):  
N. V. Filin ◽  
S. L. Simkhovich ◽  
I. F. Sultanov
Keyword(s):  
Mathematical Modeling ◽  
Jet Pump ◽  
Different Temperatures

scholarly journals Buoyancy regulation in Microcystis aeruginosa grown at different temperatures

1988 ◽  
Vol 53 (3-4) ◽  
pp. 231-237 ◽  
Author(s):  
Jacco Kromkamp ◽  
Joke Botterweg ◽  
Luuc R. Mur
Keyword(s):  
Microcystis Aeruginosa ◽  
Different Temperatures

The effect of temperature on the development and survival of the infective larvae of Strongyloides ratti Sandground, 1925

Parasitology ◽  
1968 ◽  
Vol 58 (3) ◽  
pp. 641-651 ◽  
Author(s):  
J. Barrett
Keyword(s):  
Culture Media ◽  
Maximum Activity ◽  
Temperature Adaptation ◽  
Effect Of Temperature ◽  
Free Living ◽  
Larval Stages ◽  
Infective Larvae ◽  
Significant Difference ◽  
Show Maximum Activity ◽  
Different Temperatures

The development of the free-living infective larvae of a homogonic strain Strongyloides ratti is described.The larvae develop only between 15 and 34 °C. Transfer experiments show the temperature block to be in the preparation for the second moult.Within the temperature range 15–34 °C, increasing the temperature speeds up the rate of development of all the larval stages equally, the Q10 for development being 2·5.The maximum percentage development occurs at 20 °C. The percentage development is highest in faeces–peat culture (95% development at 20 °C), whilst the percentage development in charcoal and vermiculite cultures is about the same (75% development at 20 °C.).Larvae grown on charcoal cultures are larger than those grown on vermiculite, which are larger than those grown on peat. No significant difference was found in the length:oesophagus and length:width ratios or in the variability of larvae grown at different temperatures or on different culture media.Different worm densities in the cultures of from 2000 to 10000 larvae per g of culture did not affect either the size of the infective larve or the percentage development.The optimum temperature for survival is 15 °C. Worms grown at 20 °C lived longer than worms grown at any other temperature. There was no evidence of temperature adaptation by the larvae.The infective larvae are positively thermotactic, and show maximum activity at 37 °C.I should like to thank my supervisor, Dr Tate, for his advice and encouragement. The work was carried out during the tenure of a Medical Research Council Scholarship.

Mathematical modeling determination coefficient of magneto-optical absorption in semiconductors in presence of external pressure and temperature

2021 ◽  
pp. 2150293
Author(s):  
U. I. Erkaboev ◽  
R. G. Rakhimov ◽  
N. A. Sayidov
Keyword(s):  
Mathematical Modeling ◽  
Experimental Data ◽  
Optical Absorption ◽  
Absorption Coefficient ◽  
Density Of States ◽  
External Pressure ◽  
Optical Absorption Coefficient ◽  
Dispersion Law ◽  
Different Temperatures ◽  
Simulation Results

The calculation of the coefficients of magneto-optical absorption in semiconductors at different temperatures and pressures is carried out. A formula for the temperature dependence of the oscillations of the combined density of states by the Kane dispersion law is obtained. Mathematical modeling has been carried out that determines the magneto-optical absorption coefficient in semiconductors in the presence of external influences. A new method for determining the magneto-optical absorption coefficient in semiconductors in the presence of pressure and temperature is proposed. The correspondence of simulation results with experimental data is shown.

Effects of Culture Media On Naegleria fowleri Growth At Different Temperatures

10.1645/18-6 ◽  
2018 ◽  
Vol 104 (5) ◽  
pp. 451
Author(s):  
Silvere D. Zaongo ◽  
Men-Fang Shaio ◽  
Dar-Der Ji
Keyword(s):  
Culture Media ◽  
Naegleria Fowleri ◽  
Different Temperatures ◽  
Nægleria Fowleri

scholarly journals Secondary Metabolites of Aeromonas veronii Strain A134 Isolated from a Microcystis aeruginosa Bloom

Metabolites ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 110 ◽  
Author(s):  
Gad Weiss ◽  
Dimitry Kovalerchick ◽  
Omer Murik ◽  
Assaf Sukenik ◽  
Aaron Kaplan ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Microcystis Aeruginosa ◽  
Structure Elucidation ◽  
Large Scale ◽  
Culture Media ◽  
2D Nmr ◽  
X Ray ◽  
Aeromonas Veronii ◽  
Large Scale Culture ◽  
New Compounds

Aeromonas veronii strain A134 was isolated from Microcystis aeruginosa colonies collected from Lake Kinneret (Sea of Galilee), Israel. The Aeromonas culture media inhibited the growth of M. aeruginosa (strain MGK). The crude extract of a large-scale culture of A. veronii A134 was separated in a few chromatographic steps to yield three new secondary metabolites, 9-chlorolumichrome (1), veronimide (2) and veronipyrazine (3), along with a known lumichrome and several known diketopiperazines. The structures of the new compounds were established by analyses of the data from 1D and 2D NMR experiments and HRMS data of the compounds, as well as a single-crystal X-ray analysis of synthetic 1. The structure elucidation and proposed biogenesis of the new compounds are described below.

scholarly journals Comparative Analysis of L-Carnitine Production by Y. Lipolytica in Different Conditions in Biofuel Waste and Fat-Acid Free Medium for Commercial Purposes

2021 ◽  
Author(s):  
Monika Jach ◽  
Konrad Kubiński ◽  
Ewa Sajnaga ◽  
Marek Juda ◽  
Anna Malm
Keyword(s):  
Yarrowia Lipolytica ◽  
Culture Media ◽  
Dry Weight ◽  
Culture Conditions ◽  
Industrial Wastes ◽  
Yeast Biomass ◽  
Wet Biomass ◽  
Different Temperatures ◽  
Carnitine Concentration ◽  
Biofuel Waste

Abstract Background Yarrowia lipolytica is an oleaginous yeast with the ability to grow in a variety of hydrophilic and hydrophobic substrates, including industrial wastes, in which it produces and accumulates various nutrients. Methods The aim of the present study was to examine the presence of free L-carnitine in the biomasses of two Yarrowia lipolytica strains (ATCC 9793 and A-101) growing in YPD medium and biofuel waste. The cultivations of Y. lipolytica were performed in aerobic conditions at different temperatures (20–30°C) and pH values (4.0–7.0) of the media with and without the addition of precursors for L-carnitine production, such us iron, trimethyllysine, and L-ascorbic acid in a laboratory scale or chromium chloride (III) in a pilot plant scale. Results Both tested Y. lipolytica strains grown in fatty acid-poor YPD medium at 20°C and pH 6.0 contained endogenous free L-carnitine in their biomass with a maximum of 22.85 mg/100 g of wet biomass. The addition of L-carnitine precursors to the YPD medium exerted a significant effect on L-carnitine concentration in the yeast biomass, increasing it up to 250%. In turn, the biomass of both tested Y. lipolytica strains cultivated in the biofuel waste, irrespective of the culture conditions, contained below 1 mg of L-carnitine/100 g of wet biomass. However, the supplementation of the culture media with the L-carnitine precursors significantly increased the yield of the yeast biomass by 20–30% in the biofuel waste cultures. Moreover, the addition of chromium(III) chloride into the biofuel waste caused an increase in the free L-carnitine concentration in the yeast biomass up to 2.24 mg/100 g of dry weight. Conclusion Biomass of Y. lipolytica grown in the free fat medium contained free L-carnitine, in contrast to the biomass grown in the fat-rich biofuel waste. The very low amounts of L-carnitine in the biomass of Y. lipolytica grown in the crude biofuel waste suggest that the yeast is able to utilize almost the entire pool of free L-carnitine for growth and nutritional biomass production. However, the addition of chromium to the biofuel waste contributed to an increase in L-carnitine concentration in Y. lipolytica biomass.

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