RESUMEN
Full genomic sequence shows HLA-G*01:19 differs from HLA-G*01:04:01:01 only at position 99 in exon 2.
Asunto(s)
Alelos , Exones , Antígenos HLA-G , Humanos , Secuencia de Bases , Prueba de Histocompatibilidad , Antígenos HLA-G/genética , Análisis de Secuencia de ADN/métodosRESUMEN
Microwave irradiation (with H2O2) has been shown to offer considerable advantages owing to its flexible control, low overall cost, and resulting higher soluble chemical oxygen demand (SCOD); accordingly, the method has been proposed recently as a means of improving sludge disintegration. However, the key factor controlling this sludge pretreatment process, pH, has received insufficient attention to date. To address this, the response surface approach (central composite design) was applied to evaluate the effects of total suspended solids (TSS, 2-20 g/L), pH (4-10), and H2O2 dosage (0-2 w/w) and their interactions on 16 response variables (e.g., SCODreleased, pH, H2O2remaining). The results demonstrated that all three factors affect sludge disintegration significantly, and no pronounced interactions between response variables were observed during disintegration, except for three variables (TCOD, TSSremaining, and H2O2 remaining). Quadratic predictive models were constructed for all 16 response variables (R(2): 0.871-0.991). Taking soluble chemical oxygen demand (SCOD) as an example, the model and coefficients derived above were able to predict the performance of microwave pretreatment (enhanced by H2O2 and pH adjustment) from previously published studies. The predictive models developed were able to optimize the treatment process for multiple disintegration objectives.
Asunto(s)
Peróxido de Hidrógeno/química , Microondas , Aguas del Alcantarillado/análisis , Eliminación de Residuos Líquidos/métodos , Análisis de la Demanda Biológica de Oxígeno , Concentración de Iones de Hidrógeno , Modelos Químicos , Análisis MultivarianteRESUMEN
As a clean, efficient, and renewable energy, hydrogen is regarded as a promising alternative. Because of using biomass as substrate, microbial fermentative hydrogen production can meet the need of sustainable development. The factors affecting the process of microbial fermentative hydrogen production, are analyzed in this paper on the basis of microorganisms, substrates, products and operative parameters. The parameters related to hydrogen production from organic wastes, are also mentioned.