955 resultados para Submerged-arc-welding
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Polyhydroxybutyrate (PHB) is known to have applications as medical implants and drug delivery carriers and is consequently in high demand. In the present study the possibilities of harnessing potential PHB-producing vibrios from marine sediments as a new source of PHB was investigated since marine environments are underexplored. Screening of polyhydroxyalkanoate (PHA)-producing vibrios from marine sediments was performed using a fluorescent plate assay followed by spectrophotometric analysis of liquid cultures. Out of 828 isolates, Vibrio sp. BTKB33 showed maximum PHA production of 0.21 g/L and PHA content of 193.33 mg/g of CDW. The strain was identified as Vibrio azureus based on phenotypic characterization and partial 16S rDNA sequence analysis. The strain also produced several industrial enzymes: amylase, caseinase, lipase, gelatinase, and DNase. The FTIR analysis of extracted PHA and its comparison with standard PHB indicated that the accumulated PHA is PHB. Bioprocess development studies for enhancing PHA production were carried out under submerged fermentation conditions. Optimal submerged fermentation conditions for enhanced intracellular accumulation of PHA production were found to be 35 °C, pH −7, 1.5 % NaCl concentration, agitation at 120 rpm, 12 h of inoculum age, 2.5 % initial inoculum concentration, and 36 h incubation along with supplementation of magnesium sulphate, glucose, and ammonium chloride. The PHA production after optimization was found to be increased to 0.48 g/L and PHA content to426.88 mg/g of CDW, indicating a 2.28-fold increase in production. Results indicated that V. azureus BTKB33 has potential for industrial production of PHB.
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This paper focus on the problem of locating single-phase faults in mixed distribution electric systems, with overhead lines and underground cables, using voltage and current measurements at the sending-end and sequence model of the network. Since calculating series impedance for underground cables is not as simple as in the case of overhead lines, the paper proposes a methodology to obtain an estimation of zero-sequence impedance of underground cables starting from previous single-faults occurred in the system, in which an electric arc occurred at the fault location. For this reason, the signal is previously pretreated to eliminate its peaks voltage and the analysis can be done working with a signal as close as a sinus wave as possible
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Exam questions and solutions in LaTex
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Exam questions and solutions in PDF
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El presente trabajo tiene como objetivo analizar la política pública de reintegración para grupos armados insurgentes, desde un enfoque diferencial de género. En este enfoque la investigación destaca el rol de madre cabeza de familia excombatiente.
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Resumen tomado de la revista
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Resumen tomado de la publicación
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El presente documento recoge los textos creados, tanto por ni??osy ni??as como por mayores, para el Taller Intergeneracional Art??stico-Literario organizado por la Concejal??a de la Infancia del Ayuntamiento de Coslada (Madrid). La experiencia tuvo como base el inter??s de que esas generaciones dejen de ser independientes entre si y constituyan una parte activa de la vida social. La cooperaci??n y la creatividad fueron los soportes sobre los que se sustent?? esta idea.
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Programa emitido el 28 de septiembre de 1994
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Resumen basado en el del autor
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Publicación cerrada : 1996-2002.
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Se describe una experiencia llevada a cabo en el CEIP Arias Montano (Badajoz) que consisti?? en el uso de un software concreto, el Programa Arc??n, para favorecer la comunicaci??n a trav??s de un soporte digital de un alumno con trastorno de espectro autista escolarizado en segundo curso de primaria. Se observ?? una mejora de la socializaci??n del alumno, de su integraci??n y de su capacidad comunicativa
Propuestas de geometr??a para Educaci??n Infantil en la Aplicaci??n de Recursos al Curr??culum (ARC)
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Resumen basado en el de la publicaci??n
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Resumen basado en el de la publicaci??n