Results 61 to 70 of about 45,637 (231)
The Barut Second-Order Equation: Lagrangian, Dynamical Invariants and Interactions
, 2007 The second-order equation in the (1/2,0)+(0,1/2) representation of the Lorentz group has been proposed by A. Barut in the 70s. It permits to explain the mass splitting of leptons (e,mu,tau).
Dvoeglazov, Valeri V.
core +2 more sources
Evaluación económica del impacto del turismo cultural en la ciudad de Zacatecas
Investigaciones Geográficas, 2012 El objetivo de este trabajo fue evaluar el impacto económico del turismo cultural en la ciudad de Zacatecas, con especial énfasis en su centro histórico.
Alejandrina De Sicilia Muñoz
doaj
An annotated list of the centipedes (Chilopoda) in the National Collection of Arachnids, Instituto de Biología, Universidad Nacional Autónoma de México [PDF]
, 2010 The National Collection of Arachnids, Instituto de Biología, Universidad Nacional Autónoma de México (México City) houses 476 chilopod samples, of which 197 are determined to genus and/or species. These are documented here and represent several new state
Cupul-Magaña, Fabio Germán
core
Mental Health Science, Volume 3, Issue 4, December 2025.ABSTRACT To assess the impact of the COVID‐19 pandemic on suicide deaths in Mexico between 2020 and 2022. Data were obtained from the Mexican Ministry of Health website, covering national mortality data from 2015 to 2022. Suicide rates were analyzed across different age groups using time series data, and excess mortality during the pandemic years (2020–
Patricia Salazar‐Ramírez +5 more
wiley +1 more source
Concentración de las industrias manufactureras en México: El caso de Zacatecas
Frontera Norte, 2011 La actividad industrial en México como factor de desarrollo desempeña un papel clave en el crecimiento regional. En este artículo se analiza la estructura de la industria manufacturera en el estado de Zacatecas a través de los 21 subsectores del scian ...
Francisco Javier Benita +1 more
doaj
Classification and selection of the main features for the identification of toxicity in Agaricus and Lepiota with machine learning algorithms [PDF]
PeerJThe occurrence of fungi is cosmopolitan, and while some mushroom species are beneficial to human health, others can be toxic and cause illness problems.
Jacqueline S. Ortiz-Letechipia +7 more
doaj +2 more sources
Journal of Biogeography, Volume 52, Issue 12, December 2025.ABSTRACT Aim We investigated the biogeographic consequences of chromosomal speciation, or structural changes in chromosome arrangement that lead to reproductive isolation, an intriguing speciation mechanism with implications for the phylogenetic and geographic distribution of species and chromosomal diversity. Location. North and Central America. Taxa.
Isaac W. Krone, Erin P. Westeen
wiley +1 more source
ANTIOXIDANT CAPACITY AND PHENOLIC CONTENT OF BEE HONEY PRODUCED IN ZACATECAS, MEXICO
Revista Fitotecnia Mexicana, 2020 La miel de abeja se ha utilizado desde la antigüedad por sus buenas propiedades nutricionales y terapéuticas. Se produce en todo el mundo y juega un papel importante como agente antioxidante, antiinflamatorio y antibacteriano; también aumenta la ...
C. S. Contreras-Martínez +4 more
semanticscholar +1 more source
The Cytocidal Spectrum of Bacillus thuringiensis Toxins: From Insects to Human Cancer Cells
Toxins, 2020 Bacillus thuringiensis (Bt) is a ubiquitous bacterium in soils, insect cadavers, phylloplane, water, and stored grain, that produces several proteins, each one toxic to different biological targets such as insects, nematodes, mites, protozoa, and ...
Gretel Mendoza-Almanza +6 more
doaj +1 more source
Ecology and Evolution, Volume 15, Issue 10, October 2025.Jaguars in the northern end of their distribution have recently become the center of conservation efforts; however, the State of Chihuahua has been underrepresented in monitoring projects. We present five new records of jaguars in high altitudes as well as the first evidence of two jaguars exhibiting cooperative behavior in Mexico.
M. Fernanda del Pozo‐López +2 more
wiley +1 more source