Continuous monitoring of the oxygen concentrations in the gas and liquid phases in air-purged shake-flask fermentations was accomplished by means of steam-sterilizable oxygen probes.

In this study, the effects of some factors on bacterial growth and ferrous oxidation rates were investigated by Acidithiobacillus ferrooxidan in 250 ml shake flasks. One factor at a time (OFAT) design approach was used for preliminary evaluation of various factors affecting the process, such as pH, initial ferrous and elemental sulfur concentrations, shaker agitation rate, and liquid to flask v...

Abstract The digital twin concept has developed as a method for extracting value from data, and is being new technique the design asset management of high-value engineering systems such aircraft, energy generating plant, wind turbines. In terms implementation, many proprietary software solutions have been marketed in this domain. contrast, paper describes recently released open-source framework...

Nanorod Synthesis. 0.21g of CdO, 1.08 g of ODPA and 2.73 g of TOPO were loaded into a 25 ml three-neck flask and heated to 110 °C under Argas flow at which ODPA and TOPO were dissolved (mixture becomes a brown colour). The mixture is degassed at 110°C for 30 minutes followed by switching from gas to vacuum line with a vacuum range of 150-200 mTorr. The mixture is heated to 300°C under Ar-gas at...

El análisis de emociones y el monitoreo del nivel atención los estudiantes en entornos virtuales permite a docentes tomar acciones para mejorar procesos enseñanza-aprendizaje. Por esta razón, este trabajo presenta la integración dos modelos: uno reconocimiento otro atención, ambos con objetivo hacer durante interacción un estudiante virtuales. Dicha se realiza una plataforma web desarrollada en...

Various species of Micromonospora produced yields of vitamin B(12) activity as high as 11 mug/ml under conditions of shaken flask fermentation.

Batch ethanol fermentations from sweet sorghum juice by Saccharomyces cerevisiae NP 01 were carried out in a 500 ml air-locked Erlenmeyer flask under very high gravity (VHG) and static conditions. The maximum ethanol production efficiency was obtained when 9 g l of yeast extract was supplemented to the juice. The ethanol concentration (P), productivity (Qp) and yield (Yp/s) were 120.24 ± 1.35 g...