INCREASING FLUORIDE CONCENTRATIONS AND CHANGING RECHARGE PATHWAYS WITHIN AN INTENSIVELY PUMPED AQUIFER IN CENTRAL MEXICO

2017 ◽  
Author(s):  
P.S.K. Knappett ◽  
◽  
Yanmei Li ◽  
Horacio Hernandez ◽  
J.R. Giardino ◽  
...  
Keyword(s):  
Central Mexico

Ultrastructure of the effect of T-514 obtained from Karwinskia humboldtiana on assembly and integrity of yeast's peroxisomes

1991 ◽  
Vol 49 ◽  
pp. 136-137
Author(s):  
J. Sepulveda-Saavedra ◽  
I. Vander-Klei ◽  
M. Venhuis ◽  
Y. Piñeyro-Lopez
Keyword(s):  
Culture Conditions ◽  
Toxic Effects ◽  
Candida Boidinii ◽  
Central Mexico ◽  
Poisonous Plant ◽  
Biological Behaviour ◽  
Enzyme Content ◽  
Fat Deposits ◽  
Yeast Model

Karwinskia humboldtiana is a poisonous plant that grows in semi desertic areas in north and central México. It produces several substances with different toxic effects. One of them designated T-514 damages severely the lung, kidney and liver, producing in the hepatoeyte large intracellular fat deposits and necrosis. Preliminary observations demonstrated that three is a decrease in the amount of peroxisomes in the hepatocytes of experimentally intoxicated rats and monkeys. To study the effect exerted by the T-514 on peroxisomes, a yeast model was selected, thus, three species: Saccha romices cerevisiae, Ilansenula polymorpha and Candida boidinii were used, because there is information concerning their peroxisome's morphology, enzyme content, biological behaviour under different culture conditions and biogenesis.

Population Density of Unirrigated Maize and its Influence Upon Fertilizer Efficiency in Central Mexico

1950 ◽  
Vol 14 (C) ◽  
pp. 270-275 ◽  
Author(s):  
Eilif V. Miller ◽  
John B. Pitner ◽  
Ricardo Villa J. ◽  
Carlos Romo G.
Keyword(s):  
Population Density ◽  
Fertilizer Efficiency ◽  
Central Mexico

scholarly journals Estimating the Rainwater Potential per Household in an Urban Area: Case Study in Central Mexico

Water ◽  
2015 ◽  
Vol 7 (12) ◽  
pp. 4622-4637 ◽  
Author(s):  
Liliana Lizárraga-Mendiola ◽  
Gabriela Vázquez-Rodríguez ◽  
Alberto Blanco-Piñón ◽  
Yamile Rangel-Martínez ◽  
María González-Sandoval
Keyword(s):  
Urban Area ◽  
Central Mexico

Beaucarnea olsonii (Ruscaceae), a new species of ponytail palm from southwestern Puebla, Mexico

Phytotaxa ◽  
2016 ◽  
Vol 286 (1) ◽  
pp. 13
Author(s):  
VANESSA ROJAS-PIÑA ◽  
LEONARDO O. ALVARADO-CÁRDENAS
Keyword(s):  
New Species ◽  
Endemic Species ◽  
Conservation Status ◽  
Deciduous Forests ◽  
Central Mexico ◽  
Distribution Map ◽  
Southern Central ◽  
Tropical Deciduous Forests ◽  
A New Species

Beaucarnea olsonii is described and illustrated from tropical deciduous forests of SW Puebla, Mexico. The new species can be distinguished from other Beaucarnea species by its massively swollen base that abruptly tapers into slender branches, by its conspicuously long stigma, and by its pedicel articulation that occurs at 2/3 of the length of the pedicel below the flower. With this new addition, the total number of endemic species of Beaucarnea for Mexico increases to 10, making this country the greatest center of diversification and endemism for the genus. We also provide a distribution map and a conservation status recommendation for the new species, as well as a key to the Beaucarnea species of southern central Mexico.

CERAMIC SEQUENCE, CHRONOLOGY, AND CULTURAL DYNAMICS OF THE UCAREO-ZINAPÉCUARO, MICHOACÁN OBSIDIAN SOURCE AREA

2021 ◽  
pp. 1-21
Author(s):  
Dan M. Healan ◽  
Christine Hernández
Keyword(s):  
Source Area ◽  
Central Mexico ◽  
Cultural Dynamics ◽  
Postclassic Period ◽  
Radiocarbon Dates ◽  
Pottery Analysis ◽  
Ceramic Chronology ◽  
Cross Dating ◽  
Obsidian Source

Abstract This article presents the ceramic sequence and chronology resulting from a multi-year program of survey, excavation, and analysis of pre-Hispanic settlement and exploitation within the Zinapécuaro-Ucareo (“U-Z”), Michoacan obsidian source area. Pottery analysis and classification aided by seriation analysis identified nine ceramic complexes and seven ceramic phases and sub-phases that both expand and refine the ceramic sequence previously established for the region by Gorenstein's (1985) investigations at nearby Acámbaro, Guanajuato. Initially established by ceramic cross-dating, the U-Z ceramic chronology has been largely confirmed by 30 radiocarbon dates and spans over 2,000 years of pre-Hispanic settlement, which included at least two notable episodes of trait-unit and site-unit intrusion from the eastern El Bajío and central Mexico. One of these episodes involved the appearance of two enclaves settled by individuals from the Acambay valley c. 90 km to the East, most likely from the site of Huamango, which our data indicate would have been occupied during the Middle Postclassic period.

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