RESUMEN
Efficiently mitigating and managing environmental pollution caused by the improper disposal of dyes and effluents from the textile industry is of great importance. This study evaluated the effectiveness of Streptomyces albidoflavus 3MGH in decolorizing and degrading three different azo dyes, namely Reactive Orange 122 (RO 122), Direct Blue 15 (DB 15), and Direct Black 38 (DB 38). Various analytical techniques, such as Fourier Transform Infrared (FTIR) spectroscopy, High-Performance Liquid Chromatography (HPLC), and Gas Chromatography-Mass Spectrometry (GC-MS) were used to analyze the degraded byproducts of the dyes. S. albidoflavus 3MGH demonstrated a strong capability to decolorize RO 122, DB 15, and DB 38, achieving up to 60.74%, 61.38%, and 53.43% decolorization within 5 days at a concentration of 0.3 g/L, respectively. The optimal conditions for the maximum decolorization of these azo dyes were found to be a temperature of 35 °C, a pH of 6, sucrose as a carbon source, and beef extract as a nitrogen source. Additionally, after optimization of the decolorization process, treatment with S. albidoflavus 3MGH resulted in significant reductions of 94.4%, 86.3%, and 68.2% in the total organic carbon of RO 122, DB 15, and DB 38, respectively. After the treatment process, we found the specific activity of the laccase enzyme, one of the mediating enzymes of the degradation mechanism, to be 5.96 U/mg. FT-IR spectroscopy analysis of the degraded metabolites showed specific changes and shifts in peaks compared to the control samples. GC-MS analysis revealed the presence of metabolites such as benzene, biphenyl, and naphthalene derivatives. Overall, this study demonstrated the potential of S. albidoflavus 3MGH for the effective decolorization and degradation of different azo dyes. The findings were validated through various analytical techniques, shedding light on the biodegradation mechanism employed by this strain.
Asunto(s)
Compuestos Azo , Biodegradación Ambiental , Colorantes , Streptomyces , Streptomyces/metabolismo , Compuestos Azo/metabolismo , Compuestos Azo/química , Colorantes/metabolismo , Colorantes/química , Espectroscopía Infrarroja por Transformada de Fourier/métodos , Textiles , Cromatografía de Gases y Espectrometría de Masas , Concentración de Iones de Hidrógeno , Temperatura , Industria Textil , Contaminantes Químicos del Agua/metabolismo , Cromatografía Líquida de Alta Presión , Carbono/metabolismoRESUMEN
Introducción. El abordaje del desarrollo en la primera infancia (DPI) y las dificultades del desarrollo (DD) en los países de ingresos bajos o medios (PIBM) requiere de programas aplicables y sostenibles. Se evaluó el programa de capacitación para las unidades de pediatría del desarrollo (UPD) en los centros de referencia tras siete años. Población y métodos. Diseño transversal con métodos cualicuantitativos para evaluar los servicios, la capacitación, la investigación y la promoción de las UPD. Resultados. Se mantuvieron los servicios clínicos, la capacitación, investigación y promoción. En total, 23710 niños fueron derivados. La motivación y resistencia del personal, el respaldo de los administradores y la satisfacción del paciente facilitaron el programa, aunque la invisibilidad dentro del sistema de salud fue un obstáculo. Conclusiones. En Turquía, y posiblemente otros PIBM, el programa de capacitación para las UPD es aplicable y sostenible si se abordan los obstáculos del sistema de salud.
Introduction. Addressing early childhood development (ECD) and developmental difficulties (DDs) in low and middle-income countries (LMICs) requires applicable and sustainable programs. Seven years after its implementation in 2010, we evaluated the Developmental Pediatrics Unit (DPU) Training Program in pediatric referral centers in Turkey. Population and methods. We applied crosssectional design and quantitative/qualitative methods to assess services, training, research and advocacy of the DPUs. Results. Five of six established DPUs sustained clinical services, training, research, and advocacy. A total of 23,710 children (9085 new cases in 2017) had been referred mainly for perinatal risks and chronic illness, all centers contributed with similar proportions of children. Staff motivation and endurance, hospital administrator support, and client satisfaction facilitated the program; whereas invisibility within the performance based healthcare system was a barrier. Conclusions. In Turkey and possibly other LMICs, the DPU Training Program is applicable and sustainable if health system barriers are addressed
Asunto(s)
Humanos , Masculino , Femenino , Desarrollo Infantil , Pediatría , Pobreza , Turquía , Estudios Transversales , Personal de Salud/educación , Niños con Discapacidad , Educación , TutoríaRESUMEN
Objetivo. Evaluar la percepción del dolor de recién nacidos prematuros a quienes se les administró surfactante mediante diferentes técnicas, utilizando la variabilidad de la frecuencia cardíaca (VFC).Métodos. Se aleatorizó a los recién nacidos que requirieron tratamiento con surfactante por SDR a los grupos INSURE o MIST. El análisis de la VFC se realizó con la tecnología NIPE para evaluar el componente parasimpático del sistema nervioso autónomo de los recién nacidos. Se registró la VFC antes, durante y después de administrar el surfactante. La evaluación del dolor se determinó con la escala PIPP. Resultados. Se incluyó a 14 recién nacidos en el estudio. Los grupos tenían características demográficas similares. Los puntajes de la escala PIPP no difirieron entre los grupos INSURE y MIST (p = 0,05). Se observó una diferencia estadísticamente significativa en la mediana de la VFC durante la administración del surfactante entre los grupos INSURE y MIST (52 frente a 56, p = 0,03). El análisis de la VFC fue similar entre los grupos antes y después de administrar el surfactante.Conclusión. La administración de surfactante mediante la técnica MIST podría ser más cómoda para los recién nacidos prematuros con SDR. No obstante, es necesario realizar otros estudios con series más importantes.
Objective. We aimed to assess the pain perception of preterm infants treated with different surfactant administration techniques by using heart rate variability (HRV).Methods. Preterm infants who required surfactant therapy for RDS were randomized to INSURE or MIST groups. HRV analysis was performed by Newborn Infant Parasympathetic Evaluation monitor. HRV was recorded before, during and after surfactant administration. Pain assessment was determined by Premature Infant Pain Profile (PIPP) score.Results. Fourteen infants were enrolled in the study. Demographic characteristics of the groups were similar. PIPP scores did not differ between INSURE and MIST groups (p = 0.05). Statistically significant difference in median HRV during surfactant administration was observed between INSURE and MIST groups (52 vs. 56, p = 0.03). HRV analysis was similar between groups before and after surfactant administration. Conclusion. Surfactant administration with MIST technique might be more comfortable for preterm infants with RDS. However further studies with larger series are needed.