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Search Results: 1 - 10 of 426812 matches for " Dzyan Rangel Méndez "
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Sergio Daniel Solares Barbosa,Jhocelyn Benavides Ayala,Bernabé Pe?a Orozco,Dzyan Rangel Méndez
Ense?anza e Investigación en Psicología , 2011,
Abstract: Debido al incremento en el índice de divorcios en México, esta investigación tuvo como objetivo determinar la relación que existe entre el tipo de apoyo y el estilo de amor en parejas casadas mediante la aplicación del Inventario de Estilos de Amor y el Cuestionario de Tipo de Apoyo en Parejas. Se realizó una correlación de Pearson entre los estilos de amor y los tipos de apoyo, hallándose que el estilo de amor amistoso se presenta con mayor frecuencia y tiene una relación positiva con el apoyo expresado, mientras que el amor lúdico es menos frecuente y se vincula con el apoyo negativo. Para las mujeres es muy importante que exista un sentimiento de amistad para percibir un apoyo positivo de la pareja, mientras que en los hombres la relación pasional es aquella en la que se percibe el apoyo. En hombres y mujeres el estilo de amor lúdico es el que menos apoyo positivo encuentra.
D. Rangel,D. Carreón,M. Cerca,E. Méndez
Journal of applied research and technology , 2003,
Abstract: In this work, the response of Ground Penetrating Radar (GPR) to geological characteristics of fluvio-lacustrinesoils is analyzed. GPR method is a very useful tool for structural studies of the geological media because itprovides continuous profiles from the subsoil (radargrams). The identification of thin geological structures inthe radar profiles allowed the evaluation of the detection capacity of the GPR Zond 12c for stratigraphicalpurposes. Its detection capacity depends on the achieved depth of penetration and resolution, on thetransmitted wave frequency, and of the system used for acquisition and processing of the signals. Theprospecting principle is based on the emission and reception of short electromagnetic pulses that are reflectedby electric discontinuities related to physical or structural properties of the ground.
Development of a sensitive enzyme immunoassay (ELISA) for specific identification of Lachesis acrochorda venom
Nú?ez Rangel, V;Fernández Culma, M;Rey-Suárez, P;Perea?ez, JA;
Journal of Venomous Animals and Toxins including Tropical Diseases , 2012, DOI: 10.1590/S1678-91992012000200007
Abstract: the snake genus lachesis provokes 2 to 3% of snakebites in colombia every year. two lachesis species, l. acrochorda and l. muta, share habitats with snakes from another genus, namely bothrops asper and b. atrox. lachesis venom causes systemic and local effects such as swelling, hemorrhaging, myonecrosis, hemostatic disorders and nephrotoxic symptoms similar to those induced by bothrops, portidium and bothriechis bites. bothrops antivenoms neutralize a variety of lachesis venom toxins. however, these products are unable to avoid coagulation problems provoked by lachesis snakebites. thus, it is important to ascertain whether the envenomation was caused by a bothrops or lachesis snake. the present study found enzyme linked immunosorbent assay (elisa) efficient for detecting lachesis acrochorda venom in a concentration range of 3.9 to 1000 ng/ml, which did not show a cross-reaction with bothrops, portidium, botriechis and crotalus venoms. furthermore, one fraction of l. acrochorda venom that did not show crossreactivity with b. asper venom was isolated using the same elisa antibodies; some of its proteins were identified including one gal-specific lectin and one metalloproteinase. this test may be useful to physicians, since it could be applicable for tracking the kinetic distribution of antigens in patients or experimentally envenomed animals.
Calidad nutricional y aceptabilidad de un producto formulado con carne de pollo deshuesada mecánicamente, plasma y glóbulos rojos de bovino
Benítez,Betty; Archile,Anangelina; Rangel,Lisbeth; Bracho,Mariela; Hernández,Maigualida; Márquez,Enrique;
Archivos Latinoamericanos de Nutrición , 2002,
Abstract: nutritional quality and acceptability of a product formulated with mechanically deboned poultry, plasma and bovine red cell. the purpose of this research was to evaluate the nutritional quality and acceptability of a meat product formulated with mechanically deboned poultry meat (40%), bovine plasma (40%) and bovine red cells (3%) as major ingredients. proteins, fat, humidity and ash were determined by aoac procedure, iron and calcium by atomic absorption spectrometry and essential amino acids by hplc. biological evaluation was performed using digestibility and per procedures. to evaluate the acceptability (flavor, color and odor) of the product were used 277 children. results indicated that 100 g of the formulated meat product contain 10,7 g of proteins, 4,4 g of fat, 68,6 g of humidity, 2,9 g of ash, 4,9 mg of iron, 46,6 mg of calcium. essential amino acids are above the fao requirements for a highly nutritional protein digestibility (92.4 %) and per (2.18). acceptability was 91.3 % for flavor, 81.2% for color and 92.4% for odor. the high nutritional quality and acceptability along with the low cost make this meat product suitable for government social programs.
Caldasia , 2011,
Abstract: the palynological characterization of 223 species, 171 genera and 73 families (90% of total recorded in aquatic, swamp and floodplain environments) of the wetland from the colombian caribbean region is presented. colporate apertures, tectate exine, and reticulate structure are the most common morphological characteristics. according to the plant zonation (ecology), in aquatic and swamp environments dominate families with stenopalynological behavior, such as cyperaceae, with inaperturate, pseudoaperturate, scabrate, and tectate grains, and poaceae, with monoporate, scabrate, psilate-scabrate, verrugate, and tectate grains. in floodplain dominate families with euripalynological behavior, such as apocynaceae, with stephanoporates or tricolporates, psilate, granulate, psilate-striate or psilate-scabrate, and tectate grains, and polygonaceae, with periporates or tricolporates, reticulate, regulate, granulate, semitectate or tectate grains. in riparian forest dominate families such as fabaceae, with tricolporate, psilate, scabrate, and tectate grains, and rubiaceae, with inaperturate, diporate or triporate, tricolpate or tricolporate, scabrate or reticulate, tectate, and semitectate grains.
Entamoeba histolytica: fecal antigen capture immunoassay for the diagnosis of enteric amebiasis by a monoclonal antibody
Urdaneta, Haydeé;Rangel, Antonio;Martins, Maria Sonia;Mu?oz, Jose Francisco;Hernández M, Manuel;
Revista do Instituto de Medicina Tropical de S?o Paulo , 1996, DOI: 10.1590/S0036-46651996000100008
Abstract: amebiasis continues to be of epidemiological importance in underdeveloped countries. clinical diagnosis and epidemiological setting in a region are based on the fecal microscopic identification of cysts or trophozoites. this procedure requires well trained personnel, is laborious, of low sensitivity and frequently yields false-positives results. the present study was designed to develop an immuno-enzymatic fecal 96 kda antigen capture test (coproelisa-eh) more sensitive and specific than microscopic diagnosis of amebiasis. triplicates of 177 stool samples processed by the formol-ether concentration method, were defined as positive or negative by three experienced microscopic observers. another aliquot was submitted to the antigen capture test by a monoclonal antibody against a specific membrane antigen of pathogenic strains of entamoeba histolytica. optical densities were interpreted as positive when they exceeded the mean value of negative samples plus two standard deviations. coproelisa-eh showed a 94.4% sensitivity, 98.3% specificity, 96.2% positive predictive value and 97.6% negative predictive value for the detection of e. histolytica in feces. coproelisa-eh is more sensitive and specific than microscopic examination, does not require specially trained personnel and allows the simultaneous processing of a large number of samples.
Resilience in a Mexican Pacific Mangrove after Hurricanes: Implications for Conservation Restoration  [PDF]
Mateo D. M. Ruiz Bruce Taylor, José Luis Rangel-Salazar, Bonifacio Cortés Hernández
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.412159

High resilience is a mangrove trait that is compatible with life in a dynamic environment, however, catastrophic disturbance can lead to the entire forest structure being re-defined. In the Pochutla district of Oaxaca, two hurricanes made landfall in 1997 and one more in 2012. Following the 1997 hurricanes, extensive mangrove restoration was carried out in the study area. A cohort of Rhizophora mangle saplings planted in 2007 showed 10% mortality during the first year after transplantation, an average growth of 39 cm, and a positive association between growth rate and the level of water in the lagoon. Following Hurricane Carlotta of 2012, measurements of structural impact and tree mortality were taken in restored R. mangle stands and in naturally regenerated patches of Laguncularia racemosa. The role of tree girth in R. mangle susceptibility to wind damage was also investigated. The stands of R. mangle suffered 80% reduction in stem density and 86% loss of basal area, whereas the corresponding values for L. racemosa were 26% and 15%, respectively. Within stands of R. mangle, mortality conserved a positive relationship with structural impact categories and the frequency of snapped stems was segregated across girth classes. The results suggest that L. racemosa has greater resilience to hurricane damage, which has some consistency with previous research and implications for conservation restoration protocols. In order to promote a system with higher resilience, we recommend an on-going restoration effort with mixed mangrove species.

Molecular Dynamics Study of the Primary Ferrofluid Aggregate Formation
B. M. Tanygin,V. F. Kovalenko,M. V. Petrychuk,S. A. Dzyan
Physics , 2011, DOI: 10.1016/j.jmmm.2012.07.004
Abstract: Investigations of the phase transitions and self-organization in the magnetic aggregates are of the fundamental and applied interest. The long-range ordering structures described in the Tom\'anek's systematization (M. Yoon, and D. Tom\'anek, 2010 [1]) are not yet obtained in the direct molecular dynamics simulations. The resulted structures usually are the linear chains or circles, or, else, amorphous (liquid) formations. In the present work, it was shown, that the thermodynamically equilibrium primary ferrofluid aggregate has either the long-range ordered or liquid phase. Due to the unknown steric layer force and other model idealizations, the clear experimental verification of the real equilibrium phase is still required. The predicted long-range ordered (crystallized) phase produces the faceting shape of the primary ferrofluid aggregate, which can be recognized experimentally. The medical (antiviral) application of the crystallized aggregates has been suggested. Dynamic formation of all observed ferrofluid nanostructures conforms to the Tom\'anek's systematization.
Improvement Performance of the Filling Step in Injection Mold through Vibration
Benítez-Rangel J.P.,Morales-Hernández L.A.,Trejo-Hernández M.
Ingeniería, investigación y tecnología , 2012,
Abstract: This paper shows the flow improvement in the filling step of the polymer injection process due to the polymer excitation though vibration. This process can be split up into three main steps: filling, pocking and cooling. Several mechanical and aesthetic properties of the finished product can be changed in the filling step. The objective of this investigation is to demonstrate the improvement in the filling mold under vibration without adding chemical products. To reach this result, an experimental mold was designed and manufactured in which a vibration device was coupled; it was possible to demonstrate the vibration advantage through this process. Moreover, a heuristic methodology was proposed for the experiment which shows an improvement in the filling process with frequencies close to 3 Hz.
Ocurrence of Entomopathogenic Fungus from Flea Ctenocephalides canis (Siphonaptera: Pulicidae)  [PDF]
Jonathan E. Ortega-Palomares, Hector G. Nu?ez-Palenius, Ana M. Cruz-Avalos, Aarón A. Hernández-Rangel, Roberto Lezama-Gutiérrez, César A. Angel-Sahagún
Open Journal of Veterinary Medicine (OJVM) , 2014, DOI: 10.4236/ojvm.2014.412034
Abstract: The objective of this study was to isolate entomopathogenic fungus from fleas (Ctenocephalides canis Curtis) collected from Cannis familiaris specimens. From 60 collected fleas, two dead insects presented white mycelia growth on the body surface, changing to a creamy color as time passed; the insects presented a mummified aspect, typical characteristic caused by entomopathogenic fungus. This fungus was identified as Beauveria bassiana (Balsamo-Crivelli) Vuillemin by their mycelia characteristics, macro- and micro-morphology. Up to our knowledge, this is the first report of entomopathogenic fungus isolated from adult C. canis fleas.
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