Herpetofauna del Parque Sierra de Nanchititla, estado de México, México. Lista, distribución y conservación

The Sierra de Nanchititla Natural Park is located in the southwestern corner of the state of Mexico. Most of the park is contained in the western half of the municipality of Tejupilco, bordered on the west by the states of Michoacan and Guerrero. Physiographically it is located in the Province of Sierra Madre del Sur, in the Subprovince of Depresión del rio Balsas, and represents a transition zone of climate, flora and fauna. A total of 48 species were registered in the Nanchititla Park, including 20 amphibians and 28 reptiles, of which 21 (44%) are new records for the localit

La experiencia de Nicaragua. “Brigada Universitaria 23 de julio”

Relato sobre la experiencia de la “Brigada Universitaria 23 de julio”, integrada por ocho estudiantes del ITESO y cinco de la UNAM, que partieron el primero de julio de 1989 a Nicaragua. La visita fue dividida en tres periodos, 13 días para visitar comunidades campesinas, 15 días para convivir con estudiantes y dos días destinados a la celebración del décimo aniversario de la Revolución Sandinista. La estadía en Nicaragua creó en los brigadistas nuevas perspectivas sobre el funcionamiento de las sociedades y sobre la posibilidad de cambios en México; asimismo se realizó un compromiso de responder ante las necesidades sociales e intelectuales de nuestros pueblos.ITESO, A.C

Low-Level Laser Therapy At The Healing Process Of Grade I And II Ulcers In Patients With Diabetic Foot

Background: Chronic nonhealing ulcers are one of the major causes of morbidity and disability in people with diabetes mellitus (DM), which represents the most frequent cause of hospital admission in this group of DM. In terms of the acceptability, availability, and minor adverse effects, the effect of low-level laser therapy (LLLT) on diabetic foot ulcers (DFUs) has been highly documented in scientific literature. Purpose: The present study had the aim to evaluate the effectiveness of LLLT to promote the healing of diabetic foot ulcers. Methods: A quasi-experimental test-retest study was performed  with a sample of 12 subjects. Before executing the research, it was submitted for review and approval by the Research Subcommittee of the Physiotherapy Degree, as well as the Research Committees of the Hospital General de Querétaro. Results: The average area at the beginning of the physical examination of the DFUs was 7.98cm2 (SD= 8.13), and the average area after the intervention was 0.93cm2 (SD= 1.64) revealing an average difference of -7.05cm2 (SD= 8.1) at the end of the intervention with LLLT. The Student's t-test was then used for related samples with a calculated value of t= 3.00 and significance of P=0.012 which shows at 95%, a significant difference in the reduction of the area in square centimeters of the ulcers after the application of therapeutic low-intensity laser. Conclusions: The effects and efficiency of the LLLT were demonstrated, although further study with a numerically larger sample is suggested

Certifying an irreducible 1024-dimensional photonic state using refined dimension witnesses

We report on a new class of dimension witnesses, based on quantum random access codes, which are a function of the recorded statistics and that have different bounds for all possible decompositions of a high-dimensional physical system. Thus, it certifies the dimension of the system and has the new distinct feature of identifying whether the high-dimensional system is decomposable in terms of lower dimensional subsystems. To demonstrate the practicability of this technique we used it to experimentally certify the generation of an irreducible 1024-dimensional photonic quantum state. Therefore, certifying that the state is not multipartite or encoded using non-coupled different degrees of freedom of a single photon. Our protocol should find applications in a broad class of modern quantum information experiments addressing the generation of high-dimensional quantum systems, where quantum tomography may become intractable.Comment: Journal version (except for small editorial modifications), 4+12 pages, 7 figure

La introducción y el cultivo de la rana toro (Rana catesbeiana). ¿Un atentado a la biodiversidad de México?

The bullfrog (Rana catesbeiana) has a wide natural distribution in North America, as well as having been introduced into at least 16 countries for commercial purposes. In Mexico, this species was introduced, without any controls, into at least sixteen states. No preliminary studies were conducted to determine the possible effects and changes to the environment that might be caused by its introduction. The introduction of this frog into the environment, either through escape from cultivation or through indiscriminate releases, has been assesed in several countries, and represents a serious threat to the ecosystem and biodiversity. We recommend that the time is long overdue to undertake an inventory of introduction sites of this species in Mexico, and to evaluate the environmental perturbations that have occurred owing to its introduction. We also recommend that the feasibility of controlling these introduced populations should be assessed, with the ultimate goal of possibly eradicating them altogether. The cultivation of indigenous species of frogs would seem to be a desirable alternative. There are thirty three species of ranid frogs in Mexico, several of which attain large sizes and might be commercially viable options. The cultivation of native species would eliminate the problems associated with exotic introductions