EVALUATION OF DIFFERENT PRE-SETTING CONDITIONS IN AIRLIFT BIOREACTOR TO DETERMINE THE RESPIRATORY KINETICS OF FUNGI

in culture media and, therefore, used to obtain large volumes of fungal tissue to be used as inoculum. The implementation of controlled mycorrhization programs is dependent upon the production of commercially large volumes of inoculum. As of now, there is no such place around the globe where we can find people or companies that are able to achieve such goal. Information on the fungal growing kinetics is scant, and there are no studies that deal with the topic of oxygen transfer for the cultivation of these fungi (major impediment), making it hard to produce inoculum in large scales. Therefore, the current study used an airlift bioreactor to provide information on aspects, such as time of mixture, the effect of depressurization on the oxygen concentration readings and the delay of probe response, among others, that are fundamental for the commercial production of these fungal inocula. The study showed that the results obtained from the dynamic assay need adjustments prior to analytical interpretation. The data was obtained with operating specific air flow rates of 0.2, 0.36 and 0.52 vvm. In conclusion, the study provided essential information that can be used by others to continue the studies on the dynamic aspects of an airlift bioreactor operation intended for fungal biomass production.

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Dehydrogenation kinetics of MgH2-based hydrogen storage tank at different operating temperatures and mass flow rates

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2021.12.083 ◽

2021 ◽

Author(s):

Palmarin Dansirima ◽

Autchara Pangon ◽

Oliver Utke ◽

Rapee Utke

Keyword(s):

Hydrogen Storage ◽

Mass Flow ◽

Storage Tank ◽

Flow Rates ◽

Dehydrogenation Kinetics ◽

Mass Flow Rates ◽

Operating Temperatures ◽

Kinetics Of

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Conversion of Alkoxide Solutions to Oxides: Evaporation of Products

MRS Proceedings ◽

10.1557/proc-155-163 ◽

1989 ◽

Vol 155 ◽

Author(s):

R. A. Lipeles ◽

D. J. Coleman

Keyword(s):

High Flow ◽

Drying Rate ◽

Flow Rates ◽

Long Time ◽

Drying Rates ◽

Drying Conditions ◽

Kinetics Of ◽

By Products ◽

Evaporation Kinetics ◽

Kinetics Monitoring

ABSTRACTThe evaporation of organic by-products released during drying of 1-mm thick silicon tetramethoxide gels was analyzed using gas chromatography. The evaporation kinetics of methanol depended on the drying rate achieved by flowing dry air over the gel. For drying at flow rates less than 50 cm 3/min, exponential kinetics were observed initially with a long time constant (about 100- to 400-min). For drying rates greater than 70 cm3/min, diffusional (t−1/2) kinetics were observed initially. Cracking of the gel during drying was used to indicate the degree of stress. At low drying rates, minor cracking was observed near the edges of the gel. At high flow rates, extensive cracking was observed in samples that exhibited early t−1/2 kinetics. Monitoring the kinetics of drying is essential to optimizing the drying conditions to minimize stress and cracking in gels.

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ATP-Content and Kinetics of Acrosome Reaction in Human Spermatozoa: Influence of Various Culture Media and Incubation Time

Andrologia ◽

10.1111/j.1439-0272.1988.tb00684.x ◽

2009 ◽

Vol 20 (2) ◽

pp. 169-172 ◽

Cited By ~ 2

Author(s):

S. DOLCI ◽

C. MANNA ◽

E.A. JANNINI ◽

E. PICCIONE ◽

N. PASETTO

Keyword(s):

Incubation Time ◽

Acrosome Reaction ◽

Culture Media ◽

Human Spermatozoa ◽

Atp Content ◽

Kinetics Of

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Use of whey permeate containing in situ synthesised galacto-oligosaccharides for the growth and preservation of Lactobacillus plantarum

Journal of Dairy Research ◽

10.1017/s0022029913000356 ◽

2013 ◽

Vol 80 (3) ◽

pp. 374-381 ◽

Cited By ~ 29

Author(s):

Marina Golowczyc ◽

Carlos Vera ◽

Mauricio Santos ◽

Cecilia Guerrero ◽

Paula Carasi ◽

...

Keyword(s):

Lactobacillus Plantarum ◽

Culture Media ◽

Enzymatic Reaction ◽

Raw Material ◽

Whey Permeate ◽

Cheese Industry ◽

Potential Impact ◽

And Storage ◽

Kinetics Of

Galacto-oligosaccharides (GOS) are prebiotics that have a beneficial effect on human health by promoting the growth of probiotic bacteria in the gut. GOS are commonly produced from lactose in an enzymatic reaction catalysed by β-galactosidase, named transglycosylation. Lactose is the main constituent of whey permeate (WP), normally wasted output from the cheese industry. Therefore, the main goal of this work was to optimise the synthesis of GOS in WP using β-galatosidase from Aspergillus oryzaea. WP and whey permeate enzymatically treated (WP-GOS) were used as culture media of Lactobacillus plantarum 299v. Lb. plantarum 299v attained the stationary phase in approximately 16 h, reaching 3·6 and 4·1×108 CFU/ml in WP and WP-GOS, respectively. The in situ synthesised GOS were not consumed during growth. No significant differences were observed in the growth kinetics of microorganisms in both media. After fermentation, microorganisms were dehydrated by freeze-drying and spray-drying and stored. The recovery of microorganisms after fermentation, dehydration and storage at 4 °C for at least 120 d was above 108 CFU/g. These studies demonstrated that WP is an appropriate substrate for the synthesis of GOS and the obtained product is also adequate as culture medium of Lb. plantarum 299v. The coexistence of GOS and dehydrated viable probiotic microorganisms, prepared using an effluent as raw material, represents the main achievement of this work, with potential impact in the development of functional foods.

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Kinetics of continuous GM-CSF production by recombinant Saccharomyces cerevisiae in an airlift bioreactor

Journal of Biotechnology ◽

10.1016/0168-1656(96)01409-5 ◽

1996 ◽

Vol 48 (1-2) ◽

pp. 107-116 ◽

Cited By ~ 7

Author(s):

Chin-hang Shu ◽

Shang-tian Yang

Keyword(s):

Saccharomyces Cerevisiae ◽

Airlift Bioreactor ◽

Recombinant Saccharomyces Cerevisiae ◽

Gm Csf ◽

Kinetics Of ◽

Csf Production

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Increase in the efficiency of removal of iron ions from wastewater by aquatic plant ‘Lemna minor‘

Acta periodica technologica ◽

10.2298/apt1950210s ◽

2019 ◽

pp. 210-219

Author(s):

Larisa Sablii ◽

Obodovych Oleksandr ◽

Vitalii Sydorenko ◽

Mykola Korenchuk

Keyword(s):

Wastewater Treatment ◽

Treatment Process ◽

Plant Biomass ◽

Lemna Minor ◽

Iron Ions ◽

Batch Mode ◽

Process Duration ◽

Bioreactor Operation ◽

Hydraulic Load ◽

Kinetics Of

Wastewater from food production enterprises could have significant concentrations of total iron that must be decreased. Aquatic macrophytes, for example ?Lemna genera?, have a high potential for iron ions removal, but kinetics and treatment parameters should be qualified. The aim of the work is to increase in the efficiency of removal of iron ions from wastewater in the process of biological wastewater treatment using ?Lemna minor? and to determine rational parameters of the treatment (biomass, process duration, hydraulic load). The kinetics of the removal of iron ions from the water was studied in the batch mode of a biological reactor operation under various biomass quantities. Verification of the obtained rational parameters of the process was carried out under continuous mode conditions. The results obtained from the kinetics of the batch mode the bioreactor operation process indicate an increase in the degree of removal of ferrous ions from wastewater from 61.0% to 91.7% with an increase in the plant biomass concentration from 8 mg/L to 25 mg/L during the wastewater treatment process of 24 hours. The rational parameters of removal of iron ions from wastewater in the batch mode of the bioreactor operation are determined: biomass of duckweed is 25 mg/L; the treatment process duration is 8 hours; the hydraulic load is 0,126 L/(h?L). The purification effect was 89.8%.

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Decomposition kinetics of gaseous ozone in peanuts

Engenharia Agrícola ◽

10.1590/s0100-69162011000500011 ◽

2011 ◽

Vol 31 (5) ◽

pp. 930-939 ◽

Cited By ~ 15

Author(s):

Ernandes R. de Alencar ◽

Lêda R. D. Faroni ◽

Marcio A. Martins ◽

André R. da Costa ◽

Paulo R. Cecon

Keyword(s):

Moisture Content ◽

Half Life ◽

Gas Flow ◽

Decomposition Kinetics ◽

Ozone Decomposition ◽

Residual Concentration ◽

Flow Rates ◽

Gaseous Ozone ◽

Key Factor ◽

Kinetics Of

This study was conducted to evaluate the decomposition kinetics of gaseous ozone in peanut grains. This evaluation was made with 1-kg peanut samples, moisture contents being 7.1 and 10.5% wet basis (w.b.), placed in 3-liter glass containers. The peanut grains were ozonated at the concentration of 450 µg L-1, at 25 and 35 ºC, with gas flow rates of 1.0 and 3.0 L min-1. Time of saturation was determined by quantifying the residual concentration of ozone after the gas passed through the grains to constant mass. The decomposition kinetics of ozone was evaluated after the grain mass was ozone-saturated. For the peanut grains whose moisture content was 7.1% (w.b.), at 25 and 35ºC and with flow rates of 1.0 and 3.0 L min-1, the values obtained for time of saturation of gaseous ozone ranged between 173 and 192 min; the concentration of saturation was approximately 260 µg L-1. For the grains whose moisture content was 10.5% (w.b.), a higher residual concentration of gaseous ozone was obtained at 25 ºC, that of 190 µg L-1. As regards the half-life of ozone, the highest value obtained was equivalent to 7.7 min for grains ozonated at 25 ºC, while for those with moisture content of 10.5% at 35 ºC, half-life was 3.2 min. In the process of ozone decomposition in peanut grains, temperature was concluded to be the key factor. An increase of 10 ºC in the temperature of the grains results in a decrease of at least 43% in the half-life of ozone.

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