Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Daniel Contreras"'
Autor:
Mayra Cortés, Priscilla Avendaño, Olga Encalada, Camila Salazar-Ardiles, David C. Andrade, Benito Gómez-Silva, Daniel Contreras, Norman Toro, Dayana Arias, Lorena V. Escudero
Publikováno v:
Soil Systems, Vol 8, Iss 2, p 46 (2024)
Unique worldwide, nitrate/iodine deposits (NIDs) are located along a 700 km geological belt in the Atacama Desert, Chile. They serve as the primary source of mineral ores for the extraction of iodine, sodium, and potassium nitrates. NIDs have been re
Externí odkaz:
https://doaj.org/article/1bf978d90932474b8216b7dd7a18f06f
Autor:
Xiaolei Sun, Simon Matthias May, Wulf Amelung, Ni Tang, Dominik Brill, Franko Arenas-Díaz, Daniel Contreras, Bárbara Fuentes, Roland Bol, Erwin Klumpp
Publikováno v:
Geoderma, Vol 438, Iss , Pp 116650- (2023)
As located in one of the oldest and driest deserts on Earth, soils in the Atacama Desert are greatly affected by atmospheric dust deposited on soil surface and the related fate of water-dispersible colloids (WDCs,
Externí odkaz:
https://doaj.org/article/96911a944fe64355bba2f911cfb0dbff
Autor:
Daniel Contreras-Benicio, Beatriz Elena Castro-Valenzuela, Juan Alberto Grado-Ahuir, María Eduviges Burrola-Barraza
Publikováno v:
Revista Colombiana de Ciencias Pecuarias, Vol 35, Iss 2, Pp 93-108 (2022)
Background: Mexico is innovating in the livestock industry through in vitro generation of bovine embryos with technologies such as well-of-the-well (WOW) and polyester mesh (PM) single-embryo culture systems. These techniques allow to maintain embryo
Externí odkaz:
https://doaj.org/article/13dcdc19374b4071a00060b245964ac7
Autor:
Bárbara Fuentes, Alessandra Choque, Francisco Gómez, Jaime Alarcón, Eduardo Castro-Nallar, Franko Arenas, Daniel Contreras, Ramona Mörchen, Wulf Amelung, Claudia Knief, Ghazal Moradi, Erwin Klumpp, Claudia P. Saavedra, Jörg Prietzel, Wantana Klysubun, Francisco Remonsellez, Roland Bol
Publikováno v:
Frontiers in Microbiology, Vol 12 (2022)
The extreme environmental conditions and lack of water on the soil surface in hyperarid deserts hamper microbial life, allowing only highly specialized microbial communities to the establish colonies and survive. Until now, the microbial communities
Externí odkaz:
https://doaj.org/article/1e3276769e914b12aa1d672ed389b0a4
Publikováno v:
Micromachines, Vol 13, Iss 10, p 1728 (2022)
This work presents a behavioral model for a microelectromechanical (MEM) relay for use in circuit simulation. Models require calibration, and other published relay models require over a dozen parameters for calibration, many of which are difficult to
Externí odkaz:
https://doaj.org/article/4a17360533f1416cb73c6622d358302a
Autor:
Mauricio CARVACHE-FRANCO, Wilmer CARVACHE-FRANCO, Daniel CONTRERAS-MOSCOL, Luis ANDRADE-ALCIVAR, Orly CARVACHE-FRANCO
Publikováno v:
Geo Journal of Tourism and Geosites, Vol 26, Iss 3, Pp 714-725 (2019)
Volunteer tourism as a contribution to society can improve various aspects of a destination such as the economy and society itself. The present empirical study analyzes the behavior of the volunteer tourist in relation to their motivations and satisf
Externí odkaz:
https://doaj.org/article/f7d1ca1663904809b41bc12ae47d8f0f
Autor:
William Vila González, Yaimara Zunén Hernández Puentes, Pedro Antonio Alonso Oviedo, Daniel Contreras Barrionuevo
Publikováno v:
Medimay, Vol 17, Iss 2, Pp 149-161 (2011)
Se realizó un estudio patomorfológico y morfométrico de las arterias coronarias con el objetivo de determinar el impacto del tabaquismo sobre la aterosclerosis coronaria en autopsias de individuos fumadores, para lo cual se utilizó el Sistema Ate
Externí odkaz:
https://doaj.org/article/7286be2bb5d64eaa8333330dc9de74dd
Autor:
Daniel Contreras Caballol
Publikováno v:
Revista Enfoques, Vol V, Iss 6, Pp 103-119 (2007)
The document reviews some of the theory and practical lineaments about the subject of student desertion during high school. The work is structured in two parts; the fi rst one responds to an analysis of the process of decentralization of Chilean educ
Externí odkaz:
https://doaj.org/article/dcce0ce01b004be881043547bda10c90
Autor:
José E Fernández-Britto, Roberto Wong, Daniel Contreras, Juana Delgado, Rosa Campos, Porfirio Norder
Publikováno v:
Revista Cubana de Investigaciones Biomédicas, Vol 18, Iss 3, Pp 176-188 (1999)
Se estudió el impacto del tabaquismo como factor de riesgo aterogénico en pacientes fallecidos y que se les había realizado autopsia, de edades comprendidas entre 5 y 34 años. Esta investigación multinacional de la Organización Mundial de la Sa
Externí odkaz:
https://doaj.org/article/1c636e05c2434681bdbd015cc62658a1
Autor:
Roberto Wong Navarro, José E Fernández-Britto Rodríguez, Daniel Contreras Barrionuevo, Hans Guski
Publikováno v:
Revista Cubana de Investigaciones Biomédicas, Vol 17, Iss 2, Pp 179-184 (1998)
Se realizó un estudio de las lesiones ateroscleróticas en 50 aortas de fallecidos menores de 35 años, cuyas causas de muerte no estaban relacionadas con la enfermedad aterosclerótica, separados en 3 grupos de edades y sexo. La aorta se analizó d
Externí odkaz:
https://doaj.org/article/159975c892da4ee3bea5530fe4dc8e43