Results 31 to 40 of about 45,637 (231)

Analysis of Anomalies and Trends of Climate Change Indices in Zacatecas, Mexico

open access: yesClimate, 2020
Sufficient evidence is currently available to demonstrate the reality of the warming of our planet’s climate system. Global warming has different effects on climate at the regional and local levels.
Óscar Pita-Díaz, D. Ortega-Gaucin
semanticscholar   +1 more source

Disseminated peritoneal leiomyomatosis. A rare disease with a difficult diagnosis

open access: yesRevista Médica del Hospital General de México, 2022
Background: Disseminated peritoneal leiomyomatosis is a rare, benign disease characterized by the proliferation of multiple peritoneal and subperitoneal nodules consisting of smooth muscle cells. Diagnosis is difficult due to its similarity to peritoneal
Julio Á. Barajas-Puga   +3 more
doaj   +1 more source

Quantum Gravity - Testing Time for Theories [PDF]

open access: yes, 1999
The extreme smallness of both the Planck length, on the one side, and the ratio of the gravitational to the electrical forces between, say, two electrons, on the other side has led to a widespread belief that the realm of quantum gravity is beyond ...
D. V. Ahluwalia   +6 more
core   +3 more sources

Contenido de compuestos fenólicos y capacidad antioxidante de variedades de frijol sembradas en el estado de Zacatecas

open access: yes, 2021
A total of nine varieties of bean from Zacatecas, the main producer of this legume in Mexico, were evaluated. The phenolic compounds were determined as anthocyanins, flavonoids, tannins, and total phenolics, as well as their antioxidant capacity by the ...
Jesús Aguayo Rojas   +6 more
semanticscholar   +1 more source

Contribución al conocimiento florístico de la Sierra de los Cardos, Susticacán, Zacatecas, México

open access: yesBotan‪ical Sciences, 2021
Antecedentes: La Sierra de los Cardos es una de las principales zonas montañosas de Zacatecas, se encuentra en un enclave de transición entre provincias fisiográficas y cuenta con una amplia heterogeneidad ambiental que la hace sumamente importante en ...
Leopoldo Hurtado-Reveles   +3 more
semanticscholar   +1 more source

On the Physical Origin of the Oppenheimer-Ahluwalia Zero-Energy Solutions [PDF]

open access: yes, 1998
In virtue of the Chubykalo - Smirnov-Rueda generalized form of the Maxwell-Lorentz equation a new form of the energy density of the electromagnetic field was obtained.
ANDREW E. CHUBYKALO   +2 more
core   +3 more sources

Socioeconomic and competitive positioning of livestock chains in Zacatecas, Mexico

open access: yes, 2021
Objective: To determine the positioning of the most important livestock production chains in Zacatecas, Mexico, within a matrix of socioeconomic importance and market competitiveness, and to identify research and technology ...
Blanca I. Sánchez Toledano   +2 more
semanticscholar   +1 more source

Design of a multi-level inverter for applications in distributed generation

open access: yesITEGAM-JETIA, 2022
At present, the use of electricity generation systems through alternative sources of energy is continuously increasing, due to the increase in global energy demand, and a trend in which CO2 emissions are being reduced.
Francisco Eneldo López Monteagudo   +8 more
doaj   +1 more source

The phase free, longitudinal, magnetic component of vacuum electromagnetism [PDF]

open access: yes, 1996
A charge $q$ moving in a reference laboratory system with constant velocity {\bf V} in the $X$-axis produces in the $Z$-axis a longitudinal, phase free, vacuum magnetic field which is identified as the radiated ${\bf B}^{(3)}$ field of Evans, Vigier and ...
A. E. Chubykalo   +18 more
core   +2 more sources

Economic evaluation of the impact of cultural tourism in the city of Zacatecas

open access: yesInvestigaciones Geográficas, 2012
This essay has the purpose of evaluating the economic impact of cultural tourism in the city of Zacatecas, giving special emphasis to its historic downtown.
Alejandrina De Sicilia Muñoz
doaj   +1 more source

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