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Lopez-Valenzuela R.,Coordinacion Nacional de Conservacion Del Patrimonio Cultural Del INAH | Lopez-Palacios J.A.,Coordinacion Nacional de Conservacion Del Patrimonio Cultural Del INAH | Jimenez-Reyes M.,Instituto Nacional de Investigaciones Nucleares | Catano G.,Ecologia y Sistematica de Microartropodos | Tenorio D.,Instituto Nacional de Investigaciones Nucleares
Journal of Radioanalytical and Nuclear Chemistry | Year: 2010

Thirteen Teotihuacan-style ornaments of an incense burner were studied. Ceramic pastes, pigments and mica were analyzed by neutron activation, X-ray diffraction and scanning electron microscopy. Elemental (Sc, Cr, Fe, Co, Rb, Cs, La, Ce, Nd, Sm, Eu, Tb, Yb, Lu, Hf, Th and U) and statistical analyses of ceramic-body data showed that these pieces were made from the same raw material, which is chemically different from the fine orange ceramic of Teotihuacan. Montmorillonite and the classical components of sand were the minerals identified in the ceramic pastes. The white pigment contained calcium, titanium and aluminium, the yellow pigment was ocher, and the red pigment was a mixture of red ocher and cinnabar, the binder of the pigments being clay. Exoskeletons of diatoms and locust ootecs were found in the pigments. Mica was identified as biotite, identical with that coming from Monte Alban Oaxaca. We wish to undertake a historical reconstrution of these ornaments based on archaeometric and literature data. © 2010 Akadémiai Kiadó, Budapest, Hungary. Source


Hernandez F.V.,Ecologia y Sistematica de Microartropodos | Castano-Meneses G.,Ecologia y Sistematica de Microartropodos
Sociobiology | Year: 2010

A checklist of ants recorded from the Barranca de Metztitlán Biosphere Reserve, an arid zone in Hidalgo State, Mexico, is presented. Some remarks about their biology, local and regional geographic distribution are given. A total of thirty four species were found, seven of them constituted new records for Hidalgo State (Neivamyrmex leonardi, N. opacithorax, Brachymyrmex musculus, Camponotus atriceps, Apterostigma pilosum, Pheidole callens and Ph. obtusospinosa) and three for Mexico (Paratrechina arenivaga, Temnothorax schmittii and T. terrigena). Most of the species are generalist foragers and predators. Among all the species, four of them: Neivamyrmex leonardi, Paratrechina arenivaga, Temnothoraxschmittii and Temnothorax terrigena had been reported only for the Nearctic region, while the remaining species have been recorded both for the Neartic and Neotropical regions. Identification keys to subfamilies, genera and species found in the locality are given. Source


CastanO-Meneses G.,Ecologia y Sistematica de Microartropodos | Mercado I.,Laboratorio Of Edafologia Nacolas Aguilera | Garcia-Caldero N.,Laboratorio Of Edafologia Nacolas Aguilera | Palacios-Vargas V.G.,Ecologia y Sistematica de Microartropodos
Applied Ecology and Environmental Research | Year: 2014

The effect of the support tree species and the seasonal and altitudinal variations on the physical-chemical characteristics of the water and soil accumulated in plants of the epiphytic bromeliad Tillandsia violacea were studied in “El Chico” N.tional Park, a temperate forest from Hidalgo, in Central Mexico. The relationship of these factors with arthropods living in theme was also studied. I. was found that the tree support species influenced the ions concentration in water and soil. The highest values of ions were found in plants from Abies religiosa. Altitude and the season of sampling affected calcium concentrations, as well as pH of soil and water accumulated on epiphytic Tillandsia. Electrical conductivity, calcium and dissolved organic carbon (DOC) in epiphytic water accounted for more than 60% of the variation in the density of arthropods. I. the accumulated soil pH (among 3.4-8.3), organic carbon content (17.16-30.07 mg g-1), sodium and potassium concentrations (0.26-1.43, 0.49-34.87 cmol + kg-1, respectively) were the most important factors correlated with the total fauna abundance. These results showed the role of epiphytic plants as refuges and nutrient source for arthropod communities and their influence on energy flow in this ecosystem. © 2014, ALÖKI.Kft., Budapest, Hungary.All rights recerved. Source

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