Los objetivos del presente trabajo fueron: 1) evaluar la productividad y rentabilidad de dos fuentes comerciales de pro­gesterona como integrantes de un tratamiento lactoinductor en vaquillas de reemplazo de un hato de doble propósito y 2) determinar la productividad y…

The aim of this study was to analyze the degree of infection by geohelminths in pet dogs in seven municipalities of Mexico City, together with some risk factors for human health. Two hundred samples of canine faeces were analyzed using…

Tourette syndrome (TS) was named after Georges Albert Edouard Brutus Gilles de la Tourette, who made its first formal description at the end of the 19th century. Nevertheless, some evidence indicates the disorder may have been recognised at least two…

This review article summarizes the potential role of circadian rhythmicity and melatonin in psychiatric disorders. The melatonin rhythm, with high blood levels at night and low values during the day, is a reflection of the biological clock, i.e., the suprachiasmatic…

Introduction Even though heavy alcohol consumption is frequent, alcohol-related consequences are common, and drug use has become more common in this country, we know very little about public health response and the types of treatments available for persons with substance…

One important area of research that has emerged in recent years is the assessment of factors that contribute to the development of body image problems and, more concretely, to the development of body dissatisfaction. The female sociocultural beauty ideal, a…

The present paper describes several aspects of the biological activities, physiological and behavioral responses displayed by the most recent discovered opioid peptides: endomorphins. Endormorphins comprise two endogenous C-terminal amide tetrapeptides, named as endomorphin-1 (EM1; Tyr-Pro-Trp-Phe-NH2) and endomorphin-2 (EM2; Tyr-Pro-Phe-Phe-NH2), which…

Background The current lifetime prevalence of depression among females in Mexico is 9.1% and 2.9% among males. The overall lifetime prevalence of depression is 6.2% among the general population of Mexico. Individuals that experience depressive symptomology at a young age…

Endomorphin-1 (EM1) and Endomorphin-2 (EM2) represent the two endogenous C-terminal amide tetrapeptides shown to display a high binding affinity and selectivity for the µ-opioid receptor as reported previously (see previous paper, Part I). Endomorphins injected into the VTA were shown…

Otto Kernberg states three types of personality organizations, also named psychological functional levels. They reflect the patient's predominant psychological characteristics: identity integration grade, defense mechanisms, and reality test. In mental disorders, the predominant defensive influences significantly in the severity and…