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Aproximadamente 4439 registro(s) hasta el momento: (knowledge)

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Recurso libre

Liinc em Revista

Formato:	journal
Enlaces:	Descripción completa.
Fecha:	2010-09-22
Recurso:	Directory of Open Access Journals - DOAJ

Recurso libre

Mexican plants with hypoglycaemic effect used in the treatment of diabetes
Heinrich, M - Andrade-Cetto, AA

Formato:	Artículo de investigación
Enlaces:	Diabetes mellitus is a syndrome which affects more and more people in all countries over the world. In Mexico, it is commonly treated with herbal extracts. Such treatment may be of considerable benefit especially during the early stages of the…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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Time line - The emergence and development of genetics in Mexico
Barahona, A - Ayala, FJ

Formato:	Article
Enlaces:	Early in the twentieth century it was shown that Mendel's laws apply to plants and animals and that genes reside on chromosomes. In the 1950s the double-helix model of DNA inaugurated the molecular biology era, which culminated at the end…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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New species of Pseudoeurycea (Caudata : Plethodontidae) from the mountains of the Mixteca region of Oaxaca, Mexico
Canseco-Marquez, L - Gutierrez-Mayen, G

Formato:	Article
Enlaces:	A new terrestrial species of Pseudoeurycea is described from the mountains of the Mixteca region of Oaxaca. Compared with other members of the genus, the new species is relatively slender and short-legged. The background color of the dorsum of this…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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First synthesis and structural report on selenophen-2-yl containing pnictogens: Biological activities of tris(selenophen-2-yl)stibine
Sharma, P - Rosas, N - Cabrera, A - Toscano, A - Silva, MD - Perez, D - Velasco, L - Perez, J - Gutierez, R

Formato:	Article
Enlaces:	A new tertiary stibine and bismuthine containing C-heterocyclic selenophene ring have been synthesized. Tris(2-selenophenyl)stibine (1) and tris(2-selenophenyl) bismuthine (2) and characterized by IR, MS, H-1, C-13, COSY, HETCOR NMR spectroscopy. Crystal structures of stibine and bismuthine have been determined. In…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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photic regulation of c-fos expression in the protocerebrum of crayfish
Granados-Dominguez, M - Escamilla, E - Fanjul, ML

Formato:	Article
Enlaces:	In various species of crayfish it has been proposed that different extra-retinal photoreceptors and pacemakers could be involved in the photo entrainment mechanisms. The identity of the neural structures responsible for this phenomenon is not known. The objective of this…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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New records of three freshwater ascomycetes from an urban lagoon of Tabasco, Mexico
Cifuentes, J - González, MC - Rosique Gil, E

Formato:	Article
Enlaces:	A survey of lignicolous freshwater ascomycetes was carried out in Las Ilusiones Lagoon located in the metropolitan area of Villahermosa City State of Tabasco, Mexico. Aniptodera inflatiascigera, Ascosacculus aquaticus and A. heteroguttulatus are recorded for the first time from Mexico.…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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The status of the world's land and marine mammals: Diversity, threat, and knowledge
Schipper, J - Chanson, JS - Chiozza, F - Cox, NA - Hoffmann, M - Katariya, V - Lamoreux, J - Rodrigues, ASL - Stuart, SN - Temple, HJ - Boitani, L - Lacher, TE - Mittermeier, RA - Smith, AT - Absolon, D - Aguiar, JM - Amori, G - Bakkour, N - Baldi, R - Berridge, RJ - Bielby, J - Black, PA - Blanc, JJ - Brooks, TM - Burton, JA - Butynski, TM - Catullo, G - Chapman, R - Cokeliss, Z - Collen, B - Conroy, J - Cooke, JG - da Fonseca, GAB - Derocher, AE - Dublin, HT - Duckworth, JW - Emmons, L - Emslie, RH - Festa-Bianchet, M - Foster, M - Foster, S - Garshelis, DL - Gates, C - Gimenez-Dixon, M - Good, TC - Hammerson, G - Hammond, PS - Happold, D - Happold, M - Hare, J - Harris, RB - Hawkins, CE - Haywood, M - Heaney, LR - Hedges, S - Helgen, KM - Hilton-Taylor, C - Hussain, SA - Ishii, N - Jefferson, TA - Jenkins, RKB - Johnston, CH - Keith, M - Kingdon, J - Knox, DH - Kovacs, KM - Langhammer, P - Leus, K - Lewison, R - Lichtenstein, G - Lowry, LF - Macavoy, Z - Mace, GM - Mallon, DP - Masi, M - McKnight, MW - Medellin, RA - Medici, P - Mills, G - Moehlman, PD - Molur, S - Mora, A - Nowell, K - Oates, JF - Olech, W - Oliver, WRL - Oprea, M - Patterson, BD - Perrin, WF - Polidoro, BA - Pollock, C - Powel, A - Protas, Y - Racey, P - Ragle, J - Ramani, P - Rathbun, G - Reeves, RR - Reilly, SB - Reynolds, JE - Rondinini, C - Rosell-Ambal, RG - Rulli, M - Rylands, AB - Savini, S - Schank, CJ - Sechrest, W - Self-Sullivan, C - Shoemaker, A - Sillero-Zubiri, C - De Silva, N - Smith, DE - Srinivasulu, C - Stephenson, PJ - van Strien, N - Talukdar, BK - Taylor, BL - Timmins, R - Tirira, DG - Tognelli, MF - Tsytsulina, K - Veiga, LM - Vie, JC - Williamson, EA - Wyatt, SA - Xie, Y - Young, BE - Baillie, JEM - González, S - González-Maya, JF

Formato:	Article
Enlaces:	Knowledge of mammalian diversity is still surprisingly disparate, both regionally and taxonomically. Here, we present a comprehensive assessment of the conservation status and distribution of the world's mammals. Data, compiled by 1700+ experts, cover all 5487 species, including marine mammals.…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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Lists of Shiphonophores, Polychaetes, Decapods and Chaetognaths in the Gulf of California, Mexico
Fernandez Alamo, MA - Ruiz Boijseauneau, I - Vicencio Aguilar, ME - Castillo Sandoval, O - Naranjo Zavaleta, K - Galvan Delgado, M - Solano Vargas, AF - Aranda Rodríguez, AN - Pina González, MV

Formato:	Article
Enlaces:	This work is part of the results of the research of the Laboratory of Invertebrates of the Facultad de Ciencias UNAM, partially financed by the Comision Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO) developing during 2006-2007. The…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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10.

Frozen Solutions of Fricke Dosimeter
Ramos, A - Ramos-Bernal, S - Frias, D - Mosqueira, FG - Negron-Mendoza, A

Formato:	Article
Enlaces:	Commercial product irradiation using ionizing radiation has provided a method to safely treat products in a variety of ways. Temperature is a very important factor when determining the absorbed dose of the product. However, most irradiation complexes apply dosimetric knowledge…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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11.

Prediction of TF target sites based on atomistic models of protein-DNA complexes
Angarica, VE - Perez, AG - Vasconcelos, AT - Collado-Vides, J - Contreras-Moreira, B

Formato:	Article
Enlaces:	Background: The specific recognition of genomic cis-regulatory elements by transcription factors (TFs) plays an essential role in the regulation of coordinated gene expression. Studying the mechanisms determining binding specificity in protein-DNA interactions is thus an important goal. Most current approaches…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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12.

Impact of Transcription Units rearrangement on the evolution of the regulatory network of gamma-proteobacteria
Perez, ADG - Angarica, VE - Vasconcelos, ATR - Collado-Vides, J - González, EG

Formato:	Article
Enlaces:	Background: In the past years, several studies begun to unravel the structure, dynamical properties, and evolution of transcriptional regulatory networks. However, even those comparative studies that focus on a group of closely related organisms are limited by the rather scarce…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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13.

The effect of Maya traditional harvesting on the leaf production, and demographic parameters of Sabal palm in the Yucatan Peninsula, Mexico
Martínez-Ballesté, A - Martorell-Delgado, Carlos - Caballero, J

Formato:	Article
Enlaces:	Palm leaves are an important resource for family households. The effect of harvest on leaf production, growth and fecundity of wild individual palm trees has been studied, but little is known about palm harvest in agro-forestry systems. In the Maya…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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14.

Comparing the use of indigenous knowledge with classification and ordination techniques for assessing the species composition and structure of vegetation in a tropical forest
Pineda, JB - Valdes-Valadez, G - Hernández-Stefanoni, JL

Formato:	Article
Enlaces:	dentification of groups that are similar in their floristic composition and structure (habitat types) is essential for conservation and forest managers to allocate high priority areas and to designate areas for reserves, refuges, and other protected areas. In this study,…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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15.

Methods of biogeographic analysis and their application to the distribution of Mexican gymnosperms
Contreras-Medina, R

Formato:	Article
Enlaces:	Biogeography is a discipline included in comparative biology that studies the distribution of organisms, the distributional patterns of organisms are analyzed through the application of different methods, depending on the question formulated. In this work the principles and advantages of…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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16.

La utilización de métodos cualitativos en enfermería, Using qualitative methods in nursing research
Zoucha, Rick

Formato:	info:eu-repo/semantics/article
Enlaces:	Durante las pasadas dos décadas, las personas que han realizado estudios sobre enfermería han contribuido con grandes cantidades de conocimientos que han ayudado a mejorar inmensamente la práctica clínica y los resultados de salud. Una manera de actualizar estos estudios…
Fecha:	2008-04-22
Recurso:	RUA Docencia

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17.

People using macro-fungal diversity in Oaxaca, Mexico
Cifuentes, J - Caballero, J - Garibay Orijel, R - Estrada Torres, A

Formato:	Article
Enlaces:	Traditional mycological knowledge of most Mexican ethnic groups has proven to be extensive and profound, consuming nearly 300 species of wild mushrooms. In this paper, we identified the mushrooms used by Zapotecs of Ixtlan, Oaxaca, compiled their traditional knowledge and…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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18.

Recent progress in biotechnology of Mexican medicinal plants
Villarreal, ML - Nicasio, P - Rojas, G - Alvarez, L - Quintero, R

Formato:	Article
Enlaces:	Based on traditional medicinal knowledge, it was possible to identify the plant species Solanum chrysotrichum as the source of a new antimycotic agent designated SC-1. Cell suspension batch cultures from this plant were established in shake flasks, in which the…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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19.

Pathophysiology of cholesterol gallstone disease
Uribe, M - MendezSánchez, N - PoncianoRodríguez, G - Cárdenas-Vázquez, R

Formato:	Artículo de investigación
Enlaces:	The purpose of the present paper is to review the current knowledge about cholesterol gallstone disease. It is generally accepted that the formation of cholesterol gallstone requires three major pathogenic defects, namely, supersaturation, nucleation and crystal growth as well as…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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20.

INTRODUCTION TO ALGEBRAIC K-THEORY
LLUISPUEBLA, E

Formato:	Article
Enlaces:	These notes contain a series of ten lectures delivered at the ''Universidad Nacional Autonoma de Mexico'' on its ''Primer Seminario de K-Teoria Algebraica''. They provide an introduction to the subject as well as to the other expositions in this volume.…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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21.

A female songbird out-sings male conspecifics during simulated territorial intrusions
Illes, AE - Yunes-Jimenez, L

Formato:	Article
Enlaces:	While birdsong is a model system for animal communication studies, our knowledge is derived primarily from the study of only one sex and is therefore incomplete. The study of song in a role-reversed species would provide a unique opportunity to…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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22.

Biogeography, current knowledge and conservation of threatened vascular plants characteristic of Mexican temperate forests
Vega, IL - Ayala, OA - Contreras-Medina, R - Vargas, AP

Formato:	Article
Enlaces:	The main goal of this study is to document the biogeographical patterns, current status and conservation of 24 species of vascular plants in Mexico, all of them recorded in some risk category in the Mexican official publication named 'Norma Oficial…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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23.

Prior knowledge in evolutionary fuzzy recurrent controllers design
Apolloni, Javier - Kavka, Carlos - Roggero, Patricia

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	A fuzzy controller is usually designed by formulating the knowledge of a human expert into a set of linguistic variables and fuzzy rules. As it is well known, the use of prior knowledge can dramatically improve the performance and quality…
Fecha:	2012-09-19
Recurso:	Unversidad Nacional de La Plata

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24.

Elenchos standard : le cas négligé de l’Alcibiade
Lachance, Geneviève

Formato:	Thèse ou Mémoire numérique / Electronic Thesis or Dissertation
Enlaces:	Depuis une trentaine d’années environ, les études sur la réfutation, ou elenchos (ἔλεγχος), se sont multipliées. Cet engouement n’est pas étranger à la publication d’un article de Gregory Vlastos, intitulé « The Socratic Elenchus », dans lequel sont abordées des…
Fecha:	2011-04-20
Recurso:	Université de Montreal

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25.

Peso al nacer en recién nacidos atendidos en el Hospital Gineobstetrico Isidro Ayora durante el segundo trimestre del año 2009
Moya Arteta, María Gabriela

Formato:	Tesis
Enlaces:	El peso al nacer es un indicador esencial para vigilar y evaluar el estado nutricional in-fantil y materno. El presente trabajo de investigación tiene como objetivo conocer el peso del niño al nacer en la Maternidad Isidro Ayora durante el…
Fecha:	2011-09-26
Recurso:	Universidad San Francisco de Quito

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26.

demographic trends in the cactaceae
Godinez-Alvarez, H - Ortega-Baes, P - Valverde, MT

Formato:	Article
Enlaces:	Although our biological knowledge regarding cactus species is thorough in many areas, only in recent years have ecologists addressed their demographic behavior. Here we attempt a first review of the present knowledge on cactus demography, including an analysis of the…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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27.

First record of genus Cerinomyces (Fungi: Dacrymycetales) in Mexico
Sierra,S - Cifuentes, J

Formato:	Article
Enlaces:	For the first time for Mexican mycobiota the genus Cerinomyces Mar. is reported with the species C lagerheimii (Pat.) McNabb. This species only have been found in Ecuador (type locality), Brasil, United States and Venezuela. A review of different specimens…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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28.

The first human case in Mexico of conjunctivitis caused by the avian parasite, Philophthalmus lacrimosus
Lamothe-Argumedo, R - Diaz-Camacho, SP - Nawa, Y

Formato:	Article
Enlaces:	Species of Philophthalmus parasitize primarily the eyes of wild and domestic birds. A variety of mammals, including humans, occasionally serve as the intermediate as well as the definitive hosts for this parasite, although human cases are extremely rare. Here, we…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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29.

Temperature preference and acclimation in Poecilia sphenops (Pisces, Poeciliidae)
Buckle, LF - Espina, S - Hernández, M

Formato:	Article
Enlaces:	The preferred temperature (PT) of Poecilia sphenops (Pisces, Poeciliidae) (n = 240, 1.13 +/- 0.06 g wet weight, 3.26 +/- 0.88 cm standard length) from Presa Piedra Azul, Oaxaca, Mexico, was measured at acclimation temperature of 20 degreesC, 23 degreesC,…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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30.

Mouse sperm patch-clamp recordings reveal single Cl(-)channels sensitive to niflumic acid, a blocker of the sperm acrosome reaction
Espinosa, F - de la Vega-Beltran, JL - Delgado, R - Labarca, P - Darszon, A - López-González, I

Formato:	Article
Enlaces:	Ion channels lie at the heart of gamete signaling. Understanding their regulation will improve our knowledge of sperm physiology, and may lead to novel contraceptive strategies. Sperm are tiny (similar to 3 mu m diameter) and, until now, direct evidence…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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31.

A FOSSIL EARTHSTAR (GEASTERACEAE, GASTEROMYCETES) FROM THE LATE CENOZOIC OF PUEBLA, MEXICO
MAGALLONPUEBLA, S - CEVALLOSFERRIZ, SRS

Formato:	Article
Enlaces:	The compressed basidiocarp of a fungus belonging to Geasteraceae (Lycoperdales, Gasteromycetes) was recovered from the plant-bearing Cenozoic strata of the Pie de Vaca Formation, Puebla, Mexico. The fossil specimen consists of an open exoperidium with ten triangular rays, and a…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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32.

The development of human knowledge is inextricable, as well as surprisingly inexplicable, El desarrollo del conocimiento humano es asombrosamente inextricable, y es, además, asombrosamente inexplicable
Sánchez-Pérez, Leonor

Formato:
Enlaces:	,
Fecha:	2011-02-21
Recurso:	Revistas UNAM

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33.

EMBRAPA cassava & fruits.

Formato:	Folderes / Folhetos / Cartilhas (INFOTECA-E)
Enlaces:	World of science Joining scientific Sharing knowledge and technologies with developing countries efforts to develop better solutions., 2011
Fecha:	2012-03-21
Recurso:	Informação Tecnológica en Agricultura (Infoteca-e)

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34.

Families on the spot: sexual signals influence parent-offspring interactions
Morales, J - Alonso-Alvarez, C - Perez, C - Torres, R - Serafino, E - Velando, A

Formato:	Article
Enlaces:	In 1950, Tinbergen described the elicitation of offspring begging by the red spot on the bill of parent gulls, and this became a model system for behavioural studies. Current knowledge on colour traits suggests they can act as sexual signals…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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35.

The potential of tree rings for the study of forest succession in southern Mexico
Brienen, RJW - Lebrija-Trejos, E - van Breugel, M - Bongers, F - Meave del Castillo, Jorge Arturo - Pérez-García, Eduardo Alberto - Martínez-Ramos, M

Formato:	Article
Enlaces:	Studies of tropical secondary forest succession face strong limitations due to the slow pace of succession and the time-consuming task of monitoring processes. The occurrence of tree rings in secondary forest trees may help expand our knowledge on succession in…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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36.

Engineering of a polymeric bacterial protein as a scaffold for the multiple display of peptides
Laplagne, DA - Zylberman, V - Ainciart, N - Steward, MW - Sciutto, E - Fossati, CA - Goldbaum, FA

Formato:	Article
Enlaces:	Protein assemblies with a high degree of repetitiveness and organization are known to induce strong immune responses. For that reason they have been postulated for the design of subunit vaccines by means of protein engineering. The enzyme lumazine synthase from…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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37.

IMPACTS OF CLIMATIC CHANGE ON COFFEE FLOWERING AND FRUIT DEVELOPMENT IN VERACRUZ, MEXICO
Arizpe, N - Orellana, R - Conde, E - Hernández, J - Villers, M

Formato:	Article
Enlaces:	The region of Huatusco, in Veracruz, Mexico, is an area of high coffee production. Coffee trees are sensitive to temperature and precipitation variations. Those climatic elements are related to the altitude, aspect and slope it? the agroecological shadow system. A…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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38.

FOSSIL LEGUME FRUITS FROM TERTIARY STRATA OF PUEBLA, MEXICO
MAGALLONPUEBLA, S - CEVALLOSFERRIZ, SRS

Formato:	Article
Enlaces:	Mimosoideae), Mimosa (Mimoseae, Mimosoideae), Lysiloma (Ingeae, Mimosoideae),and Sophora (Sophoreae, Papilionoideae). Another fruit exhibits a combination of characters unknown among extant legumes, and although superficially similar to some species of Papilionoideae, it represents an extinct genus. The four identified genera are…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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39.

Exploring the factors that influence the perception of risk: The case of Volcan de Colima, Mexico
Gavilanes-Ruiz, JC - Cuevas-Muniz, A - Varley, N - Gwynne, G - Stevenson, J - Saucedo-Giron, R - Perez-Perez, A - Aboukhalil, M - Cortes-Cortes, A

Formato:	Article
Enlaces:	Volcan de Colima has increased its activity considerably since 1998 with four periods of effusion and since 2003, daily Vulcanian explosions. During 2005 the magnitude of the explosivity increased, producing many pyroclastic flows, two of which reached over 5 km…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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40.

Evaluation of self-absorption of manganese emission lines in Laser Induced Breakdown Spectroscopy measurements
Bredice, F - Borges, FO - Sobral, H - Villagran-Muniz, M - Di Rocco, HO - Cristoforetti, G - Legnaioli, S - Palleschi, V - Pardini, L - Salvetti, A - Tognoni, E

Formato:	Article
Enlaces:	This paper is part of a more general study aimed to the determination of the best experimental procedures for reliable quantitative measurements of Fe-Mn alloys by LIBS. In this work, attention is pointed on the self-absorption processes, whose effect deeply…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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41.

Pathogenesis II: Fungal responses to host responses: interaction of host cells with fungi
Mendes-Giannini, MJS - Taylor, ML - Bouchara, JB - Burger, E - Calich, VLG - Escalante, ED - Hanna, SA - Lenzi, HL - Machado, MP - Miyaji, M - Da Silva, JLM - Mota, EM - Restrepo, A - Restrepo, S - Tronchin, G - Vincenzi, LR - Xidieh, CF - Zenteno, E

Formato:	Article
Enlaces:	Most of our knowledge concerning the virulence determinants of pathogenic fungi comes from the infected host, mainly from animal models and more recently from in vitro studies with cell cultures. The fungi usually present intra- and/or extracellular host-parasite interfaces, with…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

Recurso libre

42.

Coronal observations of CMEs
Schwenn, R - Raymond, JC - Alexander, D - Ciaravella, A - Gopalswamy, N - Howard, R - Hudson, H - Kaufmann, P - Klassen, A - Maia, D - Pick, M - Reiner, M - Srivastava, N - Tripathi, D - Vourlidas, A - Wang, YM - Zhang, J - Muñoz-Martínez, G

Formato:	Article
Enlaces:	CMEs have been observed for over 30 years with a wide variety of instruments. It is now possible to derive detailed and quantitative information on CME morphology, velocity, acceleration and mass. Flares associated with CMEs are observed in X-rays, and…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

Recurso libre

43.

ultrastructure of tarsal sensilla and other integument structures of two pseudocellus species (ricinulei, arachnida)
Talarico, G - Silva, MF - Alberti, G - Palacios-Vargas, JG

Formato:	Article
Enlaces:	Ricinuleids are one of the least investigated groups of Arachnida. In particular, knowledge of their ultrastructure is poor. Observations of the distal tarsomeres of ricinuleids show differences in their shape and equipment of surface structures. Legs I and II are…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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44.

Population dynamics of Mammillaria magnimamma Harworth. (Cactaceae) in a lava-field in central Mexico
Valverde-Valdés, María Teresa - Quijas, S - López-Villavicencio, M - Castillo-Argüero, Silvia

Formato:	Article
Enlaces:	One of the habitats occupied by Mammillaria magnimamma is a 2000-year old lava-field, in Mexico City. The great ecological interest on this lava-field and the little knowledge there is regarding cacti population ecology have compelled us to analyse the demography…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

Recurso libre

45.

On the firing maps of a general class of forced integrate and fire neurons
Carrillo, H - Ongay, FA

Formato:	Article
Enlaces:	Integrate and fire processes are fundamental mechanisms causing excitable and oscillatory behavior. Van der Pol [Philos. Mag. (7) 2 (11) (1926) 978] studied oscillations caused by these processes, which he called,relaxation oscillations' and pointed out their relevance, not only to…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

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46.

LATEST OCCURRENCE OF THE EXTINCT GENUS CEDRELOSPERMUM (ULMACEAE) IN NORTH-AMERICA - CEDRELOSPERMUM-MANCHESTERI FROM MEXICO
MAGALLONPUEBLA, S - CEVALLOSFERRIZ, SRS

Formato:	Article
Enlaces:	The Upper Cenozoic flora of the Pie de Vaca Formation, Puebla, Mexico, is yielding important elements that contribute to a more complete knowledge of the Tertiary floras of southern latitudes of North America. Among the most abundant plant organs in…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

Recurso libre

47.

The universal parser architecture for knowledge-based machine translation
Tomita, Masaru - Carbonell, Jaime G.

Formato:	info:eu-repo/semantics/article
Enlaces:	Descripción completa.
Fecha:	2008-07-22
Recurso:	RUA Docencia

Recurso libre

48.

Mexican native trouts: a review of their history and current systematic and conservation status
Hendrickson, DA - Perez, HE - Findley, LT - Forbes, W - Tomelleri, JR - Mayden, RL - Nielsen, JL - Jensen, B - Campos, GR - Romero, AV - van der Heiden, A - Camarena, F - de Leon, FJG

Formato:	Article
Enlaces:	While biologists have been aware of the existence of native Mexican trouts for over a century, they have received little study. The few early studies that did muchmore than mention their existence began in the 1930s and continued into the…
Fecha:	2011-01-22
Recurso:	Facultad de Ciencias - UNAM

Recurso libre

49.

Learning with Arkhanes’ model - doi: 10.4025/actascieduc.v32i2.9774, Learning with Arkhanes’ model - doi: 10.4025/actascieduc.v32i2.9774
Rozestraten, Artur Simões; USP, São Paulo

Formato:	,
Enlaces:	The present study analyzed the role of architectural representations - drawings and three-dimensional models -, on the process of knowledge building of architecture history. The article focuses on Arkhanes' model and its relationships with the reconstitution of architecture, work of…
Fecha:	2010-12-21
Recurso:	Acta Scientiarum. Education

Recurso libre

50.

Patterns d’interactions écrites asynchrones entre des classes branchées en réseau
Allaire, Stéphane; Université du Québec à Chicoutimi - Laferrière, Thérèse; Université Laval

Formato:	info:eu-repo/semantics/article, info:eu-repo/semantics/publishedVersion, research-article
Enlaces:	Résumé : L’étude s’inscrit dans le contexte de l’initiative québécoise de l’École éloignée en réseau (l’ÉÉR) visant à enrichir la qualité de l’environnement d’apprentissage des petites écoles rurales. L’étude s’intéresse de façon spécifique aux interactions asynchrones qui surviennent entre des…
Fecha:	2010-07-21
Recurso:	Canadian Journal of Learning and Technology