Aislamiento e identificación de hongos filamentosos tolerantes a metales pesados en el proceso de lodos activados en una planta de tratamientos de agua residual

Tesis (Maestro en Ciencias con Especialidad en Microbiología) U.A.N.L.

Biosorción de Pb ²? Cr ³?, Cd ²? y Zn²? en solución con levadura residual de cerveza y padina sp.

Tesis (Maestría en Ciencias de la Ingeniería Mecánica con Orientación en Procesos Sustentables) UANL, 2011.

Optimización de residuos generados en el proceso de depuración del agua residual por aplicación de tratamientos fisicoquímicos para utilizarlos como biosólidos con especies vegetales de importancia agronómica y ecológica en el Estado de Nuevo León

Tesis (Doctor con Especialidad en: Biotecnología) UANL

Efecto del lodo residual en el rendimiento y concentración de metales pesados de hortalizas y granos básicos

Tesis (Doctor en Ciencias Agrícolas con Especialidad en Agua-Suelo) U.A.N.L.

Characterization of Probability Distributions Using the Residual Entropy Function

The present study on the characterization of probability distributions using the residual entropy function. The concept of entropy is extensively used in literature as a quantitative measure of uncertainty associated with a random phenomenon. The commonly used life time models in reliability Theory are exponential distribution, Pareto distribution, Beta distribution, Weibull distribution and gamma distribution. Several characterization theorems are obtained for the above models using reliability concepts such as failure rate, mean residual life function, vitality function, variance residual life function etc. Most of the works on characterization of distributions in the reliability context centers around the failure rate or the residual life function. The important aspect of interest in the study of entropy is that of locating distributions for which the shannon’s entropy is maximum subject to certain restrictions on the underlying random variable. The geometric vitality function and examine its properties. It is established that the geometric vitality function determines the distribution uniquely. The problem of averaging the residual entropy function is examined, and also the truncated form version of entropies of higher order are defined. In this study it is established that the residual entropy function determines the distribution uniquely and that the constancy of the same is characteristics to the geometric distribution

Influence of residual cations (Na+, K+ and Mg2+) in the alkylation activity of benzene with 1-octene over rare earth metal ion exchanged FAU–Y zeolite

The effect of residual cations in rare earth metal modified faujasite–Y zeolite has been monitored using magic angle spinning NMR spectral analysis and catalytic activity studies. The second metal ions being used are Na+, K+ and Mg+. From a comparison of the spectra of different samples, it is concluded that potassium and magnesium exchange causes a greater downfield shift in the 29Si NMR peaks. Also, lanthanum exchanged samples show migration behavior from large cages to small cages, which causes the redistribution of second counter cations. It is also observed that Mg2+ causes the most effective migration of lanthanum ions due to its greater charge. The prepared systems were effectively employed for the alkylation of benzene with 1-octene in the vapor phase. From the deactivation studies it is observed that the as-exchanged zeolites possess better stability towards reaction condition over the pure HFAU zeolite.

Evaluation of cyanobacteria for biomass production and effluent treatment

The microalgae gained importance as food and feed as well as source of fine chemicals since the l960’s. Spirulina became the trend setter due to its easily culturable properties as well as nutritional composition. A rapid expansion of microalgal industry occurred in the Asia-Pacific region as microalgae came to stay as a health food supplement. Microalgae have been an integral component of oxidation ponds usually incorporated with wastewater treatment. Over the last few decades, efforts have been made to apply intensive microalgal cultures to perform biological tertiary treatment of secondary effluents. Given the limited number of species still available for commercial exploitation, it is imperative to isolate and cultivate those photosynthetic organisms with high growth rate and biomass accumulation, which could play the dual role of cleaning the wastewater and also providing useful biomass. This has been the objective of this study ie. 0 To develop pure cultures of local isolates of Cyanobacteria for extraction of biochemicals of commercial value 0 To couple biomass production with effluent treatment

“Studies on extracellular enzyme production during growth of Pleurotus sp. on lignocellulosic agriwaste and the utilization of spent mushroom substrate”

Commercially, Pleurotus spp. of mushroom are cultivated in bags. After mushroom cultivation, spent substrate remains as residual material. Proper recycling of spent substrate is beneficial for our economy. Spent substrate can be utilized for various other value added purposes through the proper knowledge of its components. Composition of various components depends on the activity of extracellular enzymes in the spent substrate. The present study was conducted to know the enzyme profile of some major extracellular enzymes - cellulase, hemicellulase (xylanase), pectinase and ligninase (lignin peroxidase and laccase) and to estimate cellulose, hemicellulose, pectin and lignin in the substrate. The use of spent substrate as a source of fibre and ethanol, and in the biodegradation of phenol by Pleurotus spp. was also investigated

Analisis de un tratamiento individual de danza movimiento terapia en un caso crónico de esquizofrenia residual

En el siguiente estudio presento1 el análisis retrospectivo de un tratamiento individual de 17 sesiones de danza movimiento terapia en un caso crónico de una mujer de 59 años, institucionalizada, con un diagnóstico de esquizofrenia residual. Mi objetivo es evaluar la evolución y conclusión del tratamiento, con el fin de encontrar puntualizaciones de interés en la técnica de la DMT para pacientes con diagnósticos de psicosis y seguir construyendo y fortaleciendo la teoría y técnica de la DMT en esta población. Mis influencias teórico-técnicas provienen principalmente de los modelos de trabajo con pacientes psiquiátricos de Chaiklin y Schmais, S. (1979), Chaiklin, S. (1981), Jones (1992) y Liebowitz (1992). Utilicé las técnicas de la improvisación, el reflejo empático (Sandel, S. 1995), la verbalización (Stark & Lohn, 1995), la imagen, la metáfora y el símbolo (Sandel, S. 1995) y las enseñanzas del sistema de análisis del movimiento de Kestenberg (1999). Las aportaciones sobre creatividad de Brainsky (1988) y Pinchas Noy (1968-1969) me fueron de gran ayuda. Para el análisis triangulo información de varias fuentes: diarios de campo realizados durante el tratamiento junto con sus señalamientos producto de supervisiones y tutorías, la entrevista inicial y final a la paciente y un video analizado con la paciente y posteriormente estudiado bajo la óptica del sistema de análisis del movimiento de Kestenberg (Kestenberg y otros, 1999). Vivencio a través de mi paciente la utilidad y éxito de la DMT en la psicosis y las técnicas que nos permiten acercarnos a esta población. La DMT trabaja la estructura, no exclusivamente el fenómeno psicótico; aunque no se transforme la personalidad se fortalece, permitiéndole al sujeto vivir mejor en su condición, ser más autónomo, eficaz, feliz y móvil. La condición perse del proceso terapéutico con un psicótico es establecer una relación terapéutica para la cual es necesario entender en el cuerpo y en la mente que el funcionamiento de un psicótico no es el mismo que el de un neurótico; la barrera neurótica del terapeuta ha de sobrepasarse para lograr la fusión simbiótica que permitirá el bottom-up del psicótico. Los objetivos de trabajo en el caso individual son: integrar y desarrollar la unidad psiquesoma, contactar y expresar emociones, desarrollar las habilidades interpersonales y sociales, expandir el universo simbólico y desarrollar el movimiento espontáneo y la creatividad. Las fases del tratamiento son: los acercamientos y observaciones preliminares; la exploración del cuerpo, identificación de los focos de trabajo y comienzo de la ampliación del movimiento; la profundización y nacimiento del símbolo en la terapia y la consolidación de los avances y cierre del tratamiento. La técnica principal, es el reflejo empático del movimiento y la emoción en la improvisación y otras útiles, el masaje, automasaje, relajación, el dibujo, entre otras.

“Studies on glucose tolerant β-glucosidases from a novel Byssochlamys fulva and their applications in biomass to ethanol conversion”

Beta-glucosidases are critical enzymes in biomass hydrolysis process and is important in creating highly efficient enzyme cocktails for the bio-ethanol industry. Among the two strategies proposed for overcoming the glucose inhibition of commercial cellulases, one is to use heavy dose of BGL in the enzyme blends and the second is to do simultaneous saccharification and fermentation where glucose is converted to alcohol as soon as it is being generated. While the former needs extremely high quantities of enzyme, the latter is inefficient since the conditions for hydrolysis and fermentation are different. This makes the process technically challenging and also in this case, the alcohol generation is lesser, making its recovery difficult. A third option is to use glucose tolerant β-glucosidases which can work at elevated glucose concentrations. However, there are very few reports on such enzymes from microbial sources especially filamentous fungi which can be cultivated on cheap biomass as raw material. There has been very less number of studies directed at this, though there is every possibility that filamentous fungi that are efficient degraders of biomass may harbor such enzymes. The study therefore aimed at isolating a fungus capable of secreting glucose tolerant β- glucosidase enzyme. Production, characterization of β-glucosidases and application of BGL for bioethanol production were attempted.

Identification of models using failure rate and mean residual life of doubly truncated random variables

In this paper, we study the relationship between the failure rate and the mean residual life of doubly truncated random variables. Accordingly, we develop characterizations for exponential, Pareto 11 and beta distributions. Further, we generalize the identities for fire Pearson and the exponential family of distributions given respectively in Nair and Sankaran (1991) and Consul (1995). Applications of these measures in file context of lengthbiased models are also explored

Dynamic cumulative residual Renyi’s entropy

Recently, cumulative residual entropy (CRE) has been found to be a new measure of information that parallels Shannon’s entropy (see Rao et al. [Cumulative residual entropy: A new measure of information, IEEE Trans. Inform. Theory. 50(6) (2004), pp. 1220–1228] and Asadi and Zohrevand [On the dynamic cumulative residual entropy, J. Stat. Plann. Inference 137 (2007), pp. 1931–1941]). Motivated by this finding, in this paper, we introduce a generalized measure of it, namely cumulative residual Renyi’s entropy, and study its properties.We also examine it in relation to some applied problems such as weighted and equilibrium models. Finally, we extend this measure into the bivariate set-up and prove certain characterizing relationships to identify different bivariate lifetime models

Rényi’s residual entropy: A quantile approach

In the present paper, we introduce a quantile based Rényi’s entropy function and its residual version. We study certain properties and applications of the measure. Unlike the residual Rényi’s entropy function, the quantile version uniquely determines the distribution

Ethanol Production From Spent Substrate Of Pleurotus Eous

Spent substrate, the residual material of mushroom cultivation, causes disposal problems for cultivators. Currently the spent substrate of different mushrooms is used mainly for composting. Edible mushrooms of Pleurotus sp. can grow on a wide range of lignocellulosic substrates. In the present study, Pleurotus eous was grown on paddy straw and the spent substrate was used for the production of ethanol. Lignocellulosic biomass cannot be saccharified by enzymes to high yield of ethanol without pretreatment. The root cause for the recalcitrance of lignocellulosic biomass such as paddy straw is the presence of lignin and hemicelluloses on the surface of cellulose. They form a barrier and prevent cellulase from accessing the cellulose in the substrate. In the untreated paddy straw, the amount of hemicelluloses and lignin (in % dry weight) were 20.30 and 20.34 respectively and the total reducing sugar was estimated to be 5.40 mg/g. Extracellular xylanase and ligninases of P. eous could reduce the amount of hemicelluloses and lignin to 16 and 11(% dry weight) respectively, by 21st day of cultivation. Growth of mushroom brought a seven fold increase in the total reducing sugar yield (39.20 mg/g) and six fold increase in the production of ethanol (6.48 g/L) after 48hrs of fermentation, when compared to untreated paddy straw