Entity

Time filter

Source Type

Puebla de Zaragoza, Mexico

de Azcarate J.G.,University of Santiago de Compostela | Costilla O.G.,Cuauhtemoc University
Acta Botanica Mexicana | Year: 2011

The vegetation belts on the slopes of the Sierra de Catorce and surrounding areas in the southern Chihuahuan Desert (State of San Luis Potosi, Mexico) were recognized. The major units of vegetation were studied from a phytosociological point of view and bioclimatic data results from weather stations were analysed and extrapolated. The Tropical Xeric and Tropical Pluviseasonal bioclimates were characterized in the area. Of the first one the Semi-arid Thermotropical, the Semi-arid Mesotropical, the Dry Mesotropical, and the Dry Supratropical belts are present. Of the second bioclimate, only the Subhumid Supratropical belt is punctually present. The description of each of these belts is accompanied by data on composition, cliserial distribution and bioclimatic diagnosis of the corresponding potential natural vegetation (diferent forest and scrub communities) and the most representative biomarkers of each situation are indicated. Source


Vicente C.P.,Cuauhtemoc University
Enfermedades Infecciosas y Microbiologia | Year: 2014

The use of ozonized oils has been effective in the treatment of numerous infectious diseases. However, many aspects concerned to the interaction of these agents with microorganisms and human cells remain still unknown. This paper reviews major key points on the antimicrobial activity of ozonated oils, and their applications in this field, which have been supported by preclinical and clinical trials. Interactions between ozonated oils and microorganisms are analyzed and mechanisms to justify their action and selective toxicity are proposed. New applications under study and potentialities that remain to be exploited for use in the control of infectious disease are also commented. Source


Romero-Guadarrama M.B.,Pathology Unit | Aguilar-Martinez E.,Cuauhtemoc University
Acta Cytologica | Year: 2010

Background: Lymphomas that infiltrate the nervous system in children correspond to those ofiprecursor B cells, such as lymphoblastic and Burkitt's lymphoma. In adults, infiltration occurs in mature B-cell lymphomas, such as mantle cell lymphoma, and, rarely, in Hodgkin's lymphoma or peripheral NK/T-cell lymphomas. Case: We report the case of a 48-year-old man, who two years before death was diagnosed with extranodal nasal NK/T-cell lymphoma nasal in the left nostril. He received radiotherapy and a year later presented tumor activity. He also presented infiltration to the bone marrow and underwent chemotherapy. Afterward, he presented paresthesia and paresis of the lower extremities, difficulty walking, loss of sphincter control, and seizures. Infiltration to the central nervous system was revealed by computed axial tomography, and cytologic study of cerebrospinal fluid revealed malignant lymphoid cells; he then received intrathecal chemotherapy. He died 3 months later. Conclusion: In Mexico, extranodal nasal NK/T-cell lymphoma occurs frequently. It is highly destructive and tightly related with the Epstein-Barr virus. Infiltration to the central nervous system is rare, and the neoplastic cells can be confused with other tumors, such as metastatic carcinomas. © The International Academy of Cytology. Source


Fonseca-Reyes S.,University of Guadalajara | Forsyth-Macquarrie A.M.,Cuauhtemoc University | Garcia De Alba-Garcia J.E.,Mexican Institute of Social Security
Blood Pressure Monitoring | Year: 2012

BACKGROUND: When blood pressure (BP) is taken for the first time, it should be measured in both arms; follow-up measurements should be taken in the arm with the highest BP. However, in clinical practice, this recommendation is rarely followed. OBJECTIVE: Identify the degree of differences in BP between the right and the left arm in individuals with normal and high BP. METHODS: We measured BP in 111 hypertensive and 80 normotensive patients in both arms at the same time using identical Omron HEM 725 CIC automatic sphygmomanometers. The devices were then switched to the other arm and another set of readings was taken. The absolute and relative difference in BP between arms was calculated from the average of these two readings. We categorized differences as at least 5, at least 10, and at least 20 mmHg for systolic blood pressure/diastolic blood pressure (SBP/DBP). RESULTS: The BP was higher in the right arm, with no statistical significance. The relative differences were also not significant: SBP 1.1±7.1 and DBP 0.21±5.0. However, the absolute differences were significant at an individual level, with a systolic difference of 5.4±4.8 mmHg and a diastolic difference of 3.9 ±3.2 mmHg. The percentages of absolute SBP/DBP differences more than 5 mmHg (21.4%/20.4%) and more than 10 mmHg (15.7%/4.7%) were considerable. The range of arm differences was clinically significant; in hypertensives, the SBP/DBP was -13.2 to +15/-9.2 to +9.6 mmHg and in nonhypertensives it was -12.9 to +15.6/-9.7 to +10.1 mmHg. CONCLUSION: Although on average there was no clinically significant relative difference between arms, absolute differences at an individual level were often clinically significant. Failure to determine interarm BP differences will lead to erroneous clinical decisions. © 2012 Wolters Kluwer Health | Lippincott. Source


Castillo-Alvarado F.L.,Escuela Superior de Fisica y Matematicas IPN | Inoue-Chavez J.A.,Escuela Superior de Fisica y Matematicas IPN | Vigil-Galan O.,Escuela Superior de Fisica y Matematicas IPN | Sanchez-Meza E.,Escuela Superior de Fisica y Matematicas IPN | And 2 more authors.
Thin Solid Films | Year: 2010

Polycrystalline thin film CdS/CdTe heterojunction solar cells are important candidates for large scale photovoltaic applications. In this work we use a C-V (capacitance vs. voltage) theoretical method for the determination of the interface charge density σ and band discontinuity ΔEv of the CdS/CdTe heterojunction. The methodology is based on three cardinal equations: i) line up of the bands relative to the common Fermi level (at equilibrium) or the quasi-Fermi level (when voltage is applied), ii) charge neutrality and iii) the total capacitance of the heterostructure. We used CdS/CdTe solar cells, grown in our laboratory by the chemical bath deposition (for CdS film) and the close space vapor transport (for CdTe film) techniques. The interface parameters σ, and ΔEv are determined from C-V fitting between the calculated and the measured curve. The methodology presented in this study is general and can be applied to semiconductor-semiconductor and semimetal-semiconductor heterojunctions. © 2009 Elsevier B.V. All rights reserved. Source

Discover hidden collaborations