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La formación de técnicos en la escuela industrial militar para la industria porfiriana en San Luis Potosí

RENE ALFREDO TORRES NAVA (2019)

"El objetivo de este artículo es mostrar cómo la educación técnica fue indispensable en el proyecto industrializador del porfiriato. Además de la utilización de fuentes primarias, desde un enfoque metodológico teórico, centrado en la historia económica y cultural, se explica la educación como una herramienta para la industria. Se da cuenta de la importancia de la Escuela Industrial Militar ante el desarrollo industrial y de la preparación de los técnicos para integrarlos al campo laboral. Se muestra el alcance de esta escuela en un contexto industrial nacional como formadora de técnicos industriales. Se analiza la educación técnica desde un enfoque cultural y económico con objeto de explicar el proyecto de la Escuela Industrial Militar y los mecanismos de esta durante el porfiriato."

Article

Educación técnica – México San Luis Potosí -- Historia – Porfiriato Escuela Industrial Militar (San Luis Potosí) Industria y educación – México CIENCIAS SOCIALES HISTORIA HISTORIA

Custom-Made Ion Exchange Membranes at Laboratory Scale for Reverse Electrodialysis

VICTOR ALEJANDRO SUAREZ TORIELLO (2019)

Salinity gradient power is a renewable, non-intermittent, and neutral carbon energy source. Reverse electrodialysis is one of the most efficient and mature techniques that can harvest this energy from natural estuaries produced by the mixture of seawater and river water. For this, the development of cheap and suitable ion-exchange membranes is crucial for a harvest profitability energy from salinity gradients. In this work, both anion-exchange membrane and cation-exchange membrane based on poly(epichlorohydrin) and polyvinyl chloride, respectively, were synthesized at a laboratory scale (255 cm2) by way of a solvent evaporation technique. Anion-exchange membrane was Surface modified with poly(ethylenimine) and glutaraldehyde, while cellulose acetate was used for the cation exchange membrane structural modification. Modified cation-exchange membrane showed an increase in surface hydrophilicity, ion transportation and permselectivity. Structural modification on the cation-exchange membrane was evidenced by scanning electron microscopy. For the modified anion exchange membrane, a decrease in swelling degree and an increase in both the ion Exchange capacity and the fixed charge density suggests an improved performance over the unmodified membrane. Finally, the results obtained in both modified membranes suggest that an enhanced performance in blue energy generation can be expected from these membranes using the reverse electrodialysis technique.

Article

Electrodialysis Electroquímica BIOLOGÍA Y QUÍMICA QUÍMICA QUÍMICA FÍSICA ELECTROQUÍMICA ELECTROQUÍMICA

El desafío del enfoque sustentable en la gestión de políticas públicas de conservación de recursos naturales Estudio de caso: Parque Nacional Miguel Hidalgo y Costilla “La Marquesa”

MIGUEL EDUARDO ALVA RIVERA (2018)

El objetivo de este artículo es discutir con base en el marco de análisis que proporciona el proceso de políticas públicas que la conservación de los recursos naturales no es percibido como un problema relevante entre la sociedad en México, a través de un estudio de caso y por medio de una aproximación cualitativa fundamentada en entrevistas semiestructuradas y fuentes de información secundarias. Los resultados de la investigación arrojan que la conservación de los recursos naturales no es un tema de amplia relevancia entre la comunidad analizada, incluso al depender de los beneficios que estos generan para su mantenimiento eonómico.

Article

Protección del medio ambiente – México – Estudio de casos Recursos naturales -- Preservación y conservación BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA CIENCIAS DE LA VIDA

Genome Damage in Rats after Transplacental Exposure to Jatropha dioica Root Extract

BLANCA PATRICIA LAZALDE RAMOS (2019)

Jatropha dioica is traditionally used owing to its antiviral, antifungal, and antimicrobial properties. But, toxicological information regarding J. dioica root total extract is currently limited. The aim of this work was to evaluate in a rat model, the transplacental genotoxicity effect of J. dioica aqueous root total extract. Three different J. dioica aqueous root total extract doses (60, 100, and 300 mg/kg) were administered orally to Wistar rats during 5 days through the pregnancy term (16–21 days). Pregnant rats were sampled every 24 h during the last 6 days of gestation, and pubs were sampled at birth. Genome damage in dams and their newborn pups transplacentally exposed to J. dioica was evaluated by in vivo micronuclei assay. We evaluated the frequency of micronucleated erythrocytes (MNE), micronucleated polychromatic erythrocytes (MNPCE), and polychromatic erythrocytes (PCE) in peripheral blood samples from pups and MNPCE and PCE in pregnant rats. No genotoxic effect was observed after oral administration of the three different doses of aqueous root total extract of J. dioica in pregnant or in their newborn pubs, after transplacental exposure. A significant decrease in PCE frequency was noted in samples from pubs of rats treated with the highest dose of J. dioica extract. The aqueous total root extract of J. dioica at the highest dose tested in our research do have cytotoxic effect in pups transplacentally exposed to this plant extract. Moreover, neither a genotoxic nor a cytotoxic effect was observed in pregnant rats. In the present work, there was no evidence of genome damage in the rat model after transplacental exposure to J. dioica aqueous root total extract.

Producción Científica de la Universidad Autónoma de Zacatecas UAZ

Article

BIOLOGÍA Y QUÍMICA Jatropha dioica micronucleated erythrocytes (MNE) genome damage

Patients with advanced oral squamous cell carcinoma have high levels of soluble E-cadherin in the saliva

BLANCA PATRICIA LAZALDE RAMOS (2017)

Background: The objective of this study was to assess the potential clinical value of the concentration of soluble salivary E-cadherin (sE-cadherin) compared with the clinical value of the presence of membranous E-cadherin (mE-cadherin) in oral squamous cell carcinoma tumor tissues. Material and Methods: Data regarding patient demographics, clinical stage, saliva and tumor tissue samples were collected. The saliva was analyzed for sE-cadherin protein levels and was compared to the mE-cadherin immu-nohistochemical expression levels in tumor tissues, which were assessed via the HercepTest® method. Patients without cancer were included in the study as a control group for comparisons of the sE-cadherin levels. Results: sE-cadherin levels in the saliva of patients without cancer were lower than those in patients with cancer, and the difference was statistically significant (p=0.031). Low mE-cadherin expression was statistically signifi-cantly associated with lymph node positivity (p=0.015) and advanced clinical stage (p=0.001). The inverse rela-tionship between mE-cadherin and sE-cadherin was significant in terms of lymph node positivity (p=0.014) and advanced clinical stage (p=0.037). Conclusions: The results suggest that sE-cadherin levels are significantly increased in patients with oral cancer and that its low expression within the membrane as well as the progression of the disease appear to be inversely associ-ated with levels of sE-cadherin in the saliva.

Producción Científica de la Universidad Autónoma de Zacatecas UAZ

Article

BIOLOGÍA Y QUÍMICA E-cadher.in saliva oral cancer

Influence of CYP1A1*2C on High Triglyceride Levels in Female Mexican Indigenous Tarahumaras

BLANCA PATRICIA LAZALDE RAMOS (2014)

Background and Aims

High triglyceride levels are closely related to cardiovascular disease. Its development lays on age, diet, physical activity, ethnicity and genetic factors. Among the last, the CYP1A1*2C allele has an influence on the metabolism of cholesterol and other fatty acids. We undertook this study to determine the frequency of CYP1A1*2C and its association with triglyceride levels in Mexican indigenous Tarahumaras and Tepehuanos.

Methods

Anthropometric and biochemical data were recorded. Genotyping of CYP1A1*2C by RT-PCR was done in 110 Tepehuano, 69 Tarahumara and 64 Mestizo.

Results

Significant differences in age, waist diameter, BMI, creatinine, glucose, cholesterol, triglycerides, HDL and VLDL measurements were found between Tarahumaras and Tepehuanos (p <0.05). Additionally, Tarahumara women showed the highest values of waist diameter, BMI and triglycerides (p <0.05). It was found that Tarahumaras showed a significant association between high triglyceride levels and CYP1A1*2C allele (OR = 2.57; 95% CI 1.12–5.88, p = 0.024) under a recessive inheritance model. However, the Tepehuano group showed a significant protective association between normal triglyceride levels and CYP1A1*2C polymorphism (OR = 0.28; 95% CI 0.10–0.80, p = 0.015) following a dominant inheritance model. The same pattern was observed after analysis with females of both ethnicities.

Conclusion

A significant association between CYP1A1*2C and high triglyceride levels in Amerindian Tarahumaras from Chihuahua has been found; this allele was significantly associated with normal triglyceride levels in Tepehuanos from Durango, Mexico. Further studies are needed to elucidate the genetic role of CYP1A1 in cardiovascular disease susceptibility.

Producción Científica de la Universidad Autónoma de Zacatecas UAZ

Article

BIOLOGÍA Y QUÍMICA High triglyceride levels Tarahumaras Tepehuanos CYP1A1

Toro

Fernando Nuno Dias Marques Simoes (2021)

Registro de informacion general multidisciplinaria de cenotes de la peninsula de yucatan, proveniente de la base de datos de cenoteando.mx

Dataset

CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA BIOLOGÍA Y QUÍMICA CIENCIAS SOCIALES