In this paper, Isopropanol (IPA) availability during the anisotropic etching of silicon in Potassium Hydroxide (KOH) solutions was investigated. Squares of 8 to 40 μm were patterned to (100) oriented silicon wafers through DWL (Direct Writing Laser) photolithography. The wet etching process was performed inside an open HDPE (High Density Polyethylene) flask with ultrasonic agitation. IPA volume...

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...

background: application noninvasive ventilation in the patients with exacerbation of chronic obstructive pulmonary disease (copd) reduced mortality. this case-control study was designed to compare efficiency and outcome of non-invasive (niv) versus invasive positive pressure ventilation (ippv) in respiratory failure due to copd methods: the patients were assigned to niv or ippv intermittantly.t...

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...

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.

conclusions according to the results of our study, neck collar fixation has no effect on ventilation in multiple trauma patients. results this study involved 163 multiple trauma patients. of these, 65% were male. the mean of end tidal carbon dioxide (etco2) of the patients without neck collars was 34.62 ± 4.46 and the mean etco2 of the patients with neck collars was 34.21 ± 2.31. there was no s...

background: endotracheal or tracheostomy tube in mechanically ventilated patients disturb verbal communication with others. therefore, patients are frustrated of requesting for their needs or problems related to artificial breathing. therefore investigating self-experiences of these patients can be applied in providing them with a better care by clinical personnel. methods: this is a qualitativ...