Results 21 to 30 of about 45,637 (231)

Anxiety, depression, and academic stress among medical students during the COVID-19 pandemic

open access: yesFrontiers in Psychology, 2023
BackgroundThe social distancing policies implemented by the health authorities during the COVID-19 pandemic in Mexico and elsewhere led to major changes in teaching strategies for college undergraduates. So far, there is limited data regarding the impact
Lorena Avila-Carrasco   +13 more
doaj   +1 more source

El emprendimiento social de base universitaria en Latinoamérica: caso Zacatecas, México

open access: yes, 2021
La globalizacion exige que los egresados de la educacion superior cuenten con habilidades que impacten en el desarrollo economico. Y una de las habilidades mas apreciadas actualmente es el emprendimiento social.
V. H. García   +2 more
semanticscholar   +1 more source

Classification and selection of the main features for the identification of toxicity in Agaricus and Lepiota with machine learning algorithms [PDF]

open access: yesPeerJ
The 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

First Evidence for Neutrinoless Double Beta Decay [PDF]

open access: yes, 2003
Double beta decay is indispensable to solve the question of the neutrino mass matrix together with $\nu$ oscillation experiments. Recent analysis of the most sensitive experiment since nine years - the HEIDELBERG-MOSCOW experiment in Gran-Sasso - yields ...
Klapdor-Kleingrothaus, H. V.
core   +3 more sources

Development and Implementation of Businesses That Care in Zacatecas, Mexico

open access: yesPrevention Science, 2021
As part of the Global Smart Drinking Goals campaign launched in 2018 in 6 “City Pilots” around the world, the Businesses That Care (BTC; Empresas Que se Cuidan in Spanish) prevention system was developed and implemented in Zacatecas, Mexico.
E. Brown   +5 more
semanticscholar   +1 more source

Importance of Local Studies of Vascular Plant Communities in Conservation and Management: A Case Study in Susticacán, Zacatecas, Mexico

open access: yesDiversity, 2021
Some parts of the globe have a deficient vegetation coverage survey causing localized plant community qualities generalized from larger scales, hindering their particular configuration.
Leopoldo Hurtado-Reveles   +3 more
semanticscholar   +1 more source

The Cytocidal Spectrum of Bacillus thuringiensis Toxins: From Insects to Human Cancer Cells

open access: yesToxins, 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

Neutral Particles in Light of the Majorana-Ahluwalia Ideas [PDF]

open access: yes, 1995
The first part of this article (Sections I and II) presents oneself an overview of theory and phenomenology of truly neutral particles based on the papers of Majorana, Racah, Furry, McLennan and Case.
A. A. Sokolov   +102 more
core   +2 more sources

Spectral signature of ultraviolet solar irradiance in Zacatecas

open access: yesGeofísica Internacional, 2006
En este trabajo se presenta un análisis de la radiación espectral global ultravioleta (290–400 nm) registrada en Zacatecas, una ciudad vecina al trópico de cáncer, situada a 2500 m sobre el nivel del mar, latitud de 22°N y longitud de 102°O.
J. L. Pinedo V.   +4 more
doaj   +1 more source

Reply to `Comment on ``Helmholtz Theorem and the V-Gauge in the Problem of Superluminal and Instantaneous Signals in Classical Electrodynamics" by A. Chubykalo Et Al' by J. A. Heras [FOUND. Phys. Lett. vol. 19(6) p. 579 (2006)] [PDF]

open access: yes, 2007
This is the reply to `COMMENT ON ``HELMHOLTZ THEOREM AND THE V-GAUGE IN THE PROBLEM OF SUPERLUMINAL AND INSTANTANEOUS SIGNALS IN CLASSICAL ELECTRODYNAMICS" BY A. CHUBYKALO ET AL' BY J. A. HERAS [FOUND. PHYS. LETT. vol. 19(6) p.
A. Chubykalo   +5 more
core   +2 more sources

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