In this paper, the characteristics of the physical-chemical degradation potential of soybean methyl biodiesel were studied, applied to samples of B100, B5, and diesel in storage tanks, including the analysis of microorganisms present in sample bodies with the correct corrosion measurement for AISI 1020 and 316L steel in different environments. Inside the tanks, immersion tests were performed on the sample body, maintaining storage conditions, dynamic conditions, and ambient temperature, for 120 days, collecting samples regularly to evaluate media degradation and analyze microorganisms to develop physicalchemical characterization, oxidation stability (OSI), and water content. Once the storage stage was completed, the corrosion ratio was measured in mm/ year according to ASTM D3707 and the presence of biological microorganisms.The oxidation stability of the B100 samples had ...

La alpaca (Vicugna pacos) es comercialmente el productor de fibra más importante de la familia de los camélidos sudamericanos. La demanda del valor agregado en dicha industria va en aumento, surgiendo nuevas calidades y colores para diseñar artículos novedosos donde el diseño de color prima; necesitando de estos parámetros para mejorar dicho proceso. el objetivo del presente estudio es Aplicar el Alcohol Graso Etoxilado como acelerador de tintura para optimizar la curva de teñido de la fibra de alpaca (Vicugna Pacos) usando colorantes Complejo Metálico. Se empleo un diseño experimental factorial 2k para evaluar el teñido de las muestras a diferentes valores de las variables independientes (temperatura, tiempo y concentración de alcohol graso) para luego hallar con la ayuda de la espectrofotometría el porcentaje de agotamiento como principal variable respuesta. Los colorantes ...

Currently, the agri-food society increases waste to the environment with potential environmental impacts and one of them is the wine industry, generating organic waste in short periods, showing that the use of fertilizers in the vineyard, packaging materials, and their waste management suchas grape production in wineries and wine production are responsible for environmental impacts that are highly polluting. In this aspect, grape extracts and grape pomace are rich sources of polyphenols, so in the present study, we evaluated the obtaining of cellulolytic enzymes, through fermentation in solid-state (FES) with strains of Trichoderma sp. Grape pomace and grape stalk residues were used, also Carboxymethylcellulose (CMC) at 0.5 % and mineral solution were added to the (FES). The results showed that grape stalk is a better substrate than grape...

Currently, the National Society of Mining, Petroleum and Energy (SNMPE) states that in recent years the production of gold in Peru has reduced, since in 2016 there was a production of 153 MT, compared to 2005 with a production of 208 MT. Until 2018, a production decrease of 5.4% was established and in 2017 a decrease of 11.3%. Currently there is a need to develop research on gold extraction processes in low recovery minerals with traditionally used processes, due to the complex structure of gold that prevents their extraction. It is necessary to evaluate new processes that are environmentally friendly and that are sustainable in the environmental and economic aspects. In the present work, the applicability of leaching with NaCl and KNO3 in acid medium in a sulphurous gold mineral was evaluated, through the process of leaching with oxidizing sa...