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| Pan,Long; Fang,Ya-kun; Zhou,Pei; Jin,Kui-qi; Gang,Wang; Liu,Yu-peng. |
| Background: The effect of diverse oxygen transfer coefficient on the L-erythrulose production from meso-erythritol by a newly isolated strain, Gluconobacter kondonii CGMCC8391 was investigated. In order to elucidate the effects of volumetric mass transfer coefficient (K La) on the fermentations, baffled and unbaffled flask cultures, and fed-batch cultures were developed in present work. Results: With the increase of the K La value in the fed-batch culture, L-erythrulose concentration, productivity and yield were significantly improved, while cell growth was not the best in the high K La. Thus, a two-stage oxygen supply control strategy was proposed, aimed at achieving high concentration and high productivity of L-erythrulose. During the first 12 h, Klawas... |
| Tipo: Journal article |
Palavras-chave: K La; Industrial biotechnology; Process control; Production; Tanning agents; Tanning properties; Artificial tanning; Dihydroxypropanone (DHA); Production of L-erythrulose; Meso-erythritol; Biosynthesis of L-erythrulose. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000600004 |
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| Segundo,Alan K. Rêgo; Martins,José H.; Monteiro,Paulo M. de B.; Oliveira,Rrubens A. de; Oliveira Filho,Delly. |
| The irrigation management based on the monitoring of the soil water content allows for the minimization of the amount of water applied, making its use more efficient. Taking into account these aspects, in this work, a sensor for measuring the soil water content was developed to allow real time automation of irrigation systems. This way, problems affecting crop yielding such as irregularities in the time to turn on or turn off the pump, and excess or deficit of water can be solved. To develop the sensors were used stainless steel rods, resin, and insulating varnish. The sensors measuring circuit was based on a microcontroller, which gives its output signal in the digital format. The sensors were calibrated using soil of the type Quartzarenic Neosoil. A... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Process control; Control system; Irrigation system. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000200006 |
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