Influence of temperature on growth of Scenedesmus obliquus in diluted olive mill wastewater as culture medium

2010 ◽  
Vol 10 (3) ◽  
pp. 257-264 ◽  
Author(s):  
Gassan Hodaifa ◽  
Ma Eugenia Martínez ◽  
Sebastián Sánchez
Keyword(s):  
Culture Medium ◽  
Scenedesmus Obliquus ◽  
Olive Mill Wastewater ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Olive Mill

Influence of pH on the culture of Scenedesmus obliquus in olive-mill wastewater

2009 ◽  
Vol 14 (6) ◽  
pp. 854-860 ◽  
Author(s):  
Gassan Hodaifa ◽  
Ma. Eugenia Martínez ◽  
Sebastián Sánchez
Keyword(s):  
Scenedesmus Obliquus ◽  
Olive Mill Wastewater ◽  
Influence Of Ph ◽  
Olive Mill

The Influence of Temperature on Growth, Sporulation, and Heat Resistance of Spores of Six Strains of Clostridium perfringens

1975 ◽  
Vol 38 (8) ◽  
pp. 461-465 ◽  
Author(s):  
C. R. REY ◽  
H. W. WALKER ◽  
P. L. ROHRBAUGH
Keyword(s):  
Heat Resistance ◽  
Clostridium Perfringens ◽  
Culture Medium ◽  
Optimum Growth ◽  
Influence Of Temperature ◽  
Influence Of Temperature On

The influence of temperature on growth, sporulation, and heat resistance of six strains of Clostridium perfringens was examined. The range of temperatures for growth and sporulation varied between strains and was influenced by the culture medium. Optimum growth occurred in Thioglycolate medium between 30 and 40 C for all strains. Optimum sporulation in Ellner's medium occurred in the 37 to 40 C range for all strains. The maximum number of spores produced varied with the strain. Heat resistance of the spores varied between strains but was not modified by temperature of incubation.

Bioenergetic strategy of microalgae for the biodegradation of tyrosol and hydroxytyrosol

2017 ◽  
Vol 72 (5-6) ◽  
pp. 227-236 ◽  
Author(s):  
Aikaterini Papazi ◽  
Andreas Ioannou ◽  
Myrto Symeonidi ◽  
Andreas G. Doulis ◽  
Kiriakos Kotzabasis
Keyword(s):  
Phenolic Compounds ◽  
Scenedesmus Obliquus ◽  
Growth Conditions ◽  
Fluorescence Induction ◽  
Olive Mill Wastewater ◽  
Lower Growth ◽  
Cellular Energy ◽  
Rational Management ◽  
High Concentrations ◽  
Olive Mill

Abstract Olive mill wastewater has significant polluting properties due to its high phenolic content [mainly tyrosol (trs) and hydroxytyrosol (htrs)]. Growth kinetics and a series of fluorescence induction measurements for Scenedesmus obliquus cultures showed that microalgae can be tolerant of these phenolic compounds. Changes in the cellular energy reserves and concentration of the phenolic compounds adjust the “toxicity” of these compounds to the microalgae and are, therefore, the main parameters that affect biodegradation. Autotrophic growth conditions of microalgae and high concentrations of trs or htrs induce higher biodegradation compared with mixotrophic conditions and lower phenolic concentrations. When microalgae face trs and htrs simultaneously, biodegradation begins from htrs, the more energetically demanding compound. All these lead to the conviction that microalgae have a “rational” management of cellular energy balance. Low toxicity levels lead to higher growth and lower biodegradation, whereas higher toxicity levels lead to lower growth and higher biodegradation. The selection of appropriate conditions (compatible to the bioenergetic strategies of microalgae) seems to be the key for a successful biodegradation of a series of toxic compounds, thus paving the way for future biotechnological applications for solving complicated pollution problems, like the detoxification of olive mill wastewater.

scholarly journals Removal of Phenolic Compounds from Olive Mill Wastewater by Microalgae Grown Under Dark and Light Conditions

2021 ◽  
Author(s):  
Astrid Victoria Lindner ◽  
Daniel Pleissner
Keyword(s):  
Phenolic Compounds ◽  
Culture Medium ◽  
Antimicrobial Properties ◽  
Olive Mill Wastewater ◽  
Light Conditions ◽  
Environmental Threat ◽  
Metabolic Versatility ◽  
Dark Conditions ◽  
Monoraphidium Braunii ◽  
Olive Mill

AbstractPhenolic compounds in olive mill wastewater (OMW) are considered an environmental threat due to their antimicrobial properties. Because of the metabolic versatility of microalgae, a biotic removal of these compounds seems a suitable approach. To investigate the biotic removal of phenolic compounds, the three microalgae species Chlorella vulgaris, Acutodesmus obliquus and Monoraphidium braunii were cultivated in flasks under constant light (50 µmol/m2s) and dark (1 g/L glucose) conditions in presence of different concentrations of OMW. Addition of 1% (v/v) OMW to the culture medium was shown to be non-inhibitory or even growth enhancing, and phenolic compounds were removed by 7–21% by all tested species. Cultivations with 6% (v/v) OMW resulted in a few exceptional experiments in fast growth (C. vulgaris under light, M. braunii under dark conditions) and removal of phenolic compounds (M. braunii, dark). Higher percentages (12 and 25%, v/v) of OMW were inhibitory. Under dark conditions microalgae first consumed glucose and removed phenolic compounds in a diauxic process. Removal of phenolic compounds was favoured under light conditions. Results of this study reveal the opportunities and the challenges of a microalgae-based removal of phenolic compounds and valorization of toxic OMW. Graphic abstract

The effect of temperature on high-resolution TEM image contrast

1995 ◽  
Vol 53 ◽  
pp. 640-641
Author(s):  
T. Geipel ◽  
W. Mader ◽  
P. Pirouz
Keyword(s):  
Form Factor ◽  
Inelastic Scattering ◽  
Accurate Method ◽  
Waller Factor ◽  
Effect Of Temperature ◽  
Specimen Thickness ◽  
Influence Of Temperature ◽  
Debye Waller Factor ◽  
Influence Of Temperature On ◽  
Atomic Form Factor

Temperature affects both elastic and inelastic scattering of electrons in a crystal. The Debye-Waller factor, B, describes the influence of temperature on the elastic scattering of electrons, whereas the imaginary part of the (complex) atomic form factor, fc = fr + ifi, describes the influence of temperature on the inelastic scattering of electrons (i.e. absorption). In HRTEM simulations, two possible ways to include absorption are: (i) an approximate method in which absorption is described by a phenomenological constant, μ, i.e. fi; - μfr, with the real part of the atomic form factor, fr, obtained from Hartree-Fock calculations, (ii) a more accurate method in which the absorptive components, fi of the atomic form factor are explicitly calculated. In this contribution, the inclusion of both the Debye-Waller factor and absorption on HRTEM images of a (Oll)-oriented GaAs crystal are presented (using the EMS software.Fig. 1 shows the the amplitudes and phases of the dominant 111 beams as a function of the specimen thickness, t, for the cases when μ = 0 (i.e. no absorption, solid line) and μ = 0.1 (with absorption, dashed line).

The Influence of Temperature on Successful Reproductions of Burbot, Lota Lota (L.) Under Hatchery Conditions

2010 ◽  
Vol 25 (1) ◽  
pp. 93-105 ◽  
Author(s):  
Daniel Żarski ◽  
Dariusz Kucharczyk ◽  
Wojciech Sasinowski ◽  
Katarzyna Targońska ◽  
Andrzej Mamcarz
Keyword(s):  
Lota Lota ◽  
Influence Of Temperature ◽  
Influence Of Temperature On
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