Results 31 to 40 of about 5,441 (186)

Consumo de nuevas sustancias psicoactivas: un reto para el sistema de monitoreo y atención en salud

Revista Internacional de Investigación en Adicciones, 2020
Las nuevas sustancias psicoactivas (NSP) son sustancias de abuso en forma pura o preparada no incluidas en las Convenciones Internacionales que suponen una amenaza a la salud pública.
Ricardo Sánchez-Huesca, Liliana Templos-Núñez   +1 more
doaj   +1 more source

Intra‐annual transfer of hydrogen and oxygen isotopic signals from water and sugar precursors to tree rings: Processes and mechanisms

New Phytologist, Volume 251, Issue 3, Page 1143-1160, August 2026.
Intra‐annual radial growth of beech and spruce in 2021 and 2022. Summary The oxygen (δ18O) and hydrogen (δ2H) isotope compositions of leaf and xylem water shape tree‐ring isotope baselines, while the fraction of sugars undergoing isotopic modification downstream of leaves (fO, fH) determines the dominant hydrologic signal.
Haoyu Diao, Meisha Holloway‐Phillips, Xin Song, Fabian Bernhard, Peter Waldner, Kerstin Treydte, Matthias Saurer, Georg von Arx, Arthur Gessler, Katrin Meusburger, Marco M. Lehmann   +10 more
wiley   +1 more source

Presencia de agroquímicos en ecosistemas acuáticos de zonas costeras y análisis preliminar del riesgo ambiental.

Uniciencia, 1998
En el período que va de 1992 a 1997, Costa Rica importó alrededor de 41 millones de kilogramos de i.a. La cantidad total de i.a. importada en 1997 es un 61% mayor que la importada en 1992. La cantidad de i.a.
Elba De la Cruz, Luisa Eugenia Castillo
doaj  

Síndrome de abstinencia neonatal en bebés nacidos de madres con dependencia a sustancias (Pereira, Colombia, 2019)

Biociencias
Introducción: La adicción a las drogas es un problema de salud pública a nivel mundial con amplias implicaciones en la sociedad, y afecta de manera significativa a las madres lactantes con adicciones, poniendo en riesgo la salud de los recién nacidos ...
Germán Oved Acevedo Osorio, Angélica María Blanco Vanegas, Daniel Felipe Quintero Hurtado, Kennith Tatiana Jiménez Cortés   +3 more
doaj   +1 more source

Barley HvBODYGUARD1 controls cuticular specialisations regulated by SHINE transcription factors

New Phytologist, Volume 251, Issue 3, Page 1188-1208, August 2026.
Cuticle defects result from defective HvBDG1 alleles. Summary Land plants secrete a protective outer cuticular layer with diverse functions. Barley (Hordeum vulgare L.) develops two cuticular specialisations: the β‐diketone rich wax bloom on vegetative tissues and an adherent grain surface which sticks to the hulls, leading to barley's distinctive ...
Trisha McAllister, Chiara Campoli, Linsan Liu, Tansy Chia, S. Ronan Fisher, Richard Horsnell, Alan R. Prescott, Jennifer Shoesmith, Mhmoud Eskan, Alasdair Iredale, Mirjam Nuter, Luke Ramsay, Micha M. Bayer, Linda Milne, Miriam Schreiber, Yogeswari Rajarathinam, Vanessa Wahl, Robbie Waugh, James Cockram, Sarah M. McKim   +19 more
wiley   +1 more source

Chemical compounds exposure and human health: advances on the politics of chemical risk control Exposición a sustancias químicas y salud humana: avances en la política de control del riesgo químico

Revista de Salud Ambiental, 2002
Advances on the politics of chemical risk control. Observed deficiencies on the management, elimination and recirculation of chemical products. Therefore, some of the main challenges for the scientific research, environmental health, nature preservation ...
Eduardo de la Peña, Ana de la Torre, Pilar Gascó   +2 more
doaj  

Photoprotective and Therapeutic Potential in Skin Cancer of Amaryllidaceae Alkaloids

Proceedings, 2019
Skin cancer has evolved as the most common malignant disease, accounting for 4.5% of all new cancer cases. [...]
Carol Castañeda, Karent Bravo, Natalie Cortés, Warley de S. Borges, Jaume Bastida, Edison Osorio   +5 more
doaj   +1 more source

Conserved symbiosis‐associated genes in the cycad Encephalartos natalensis suggest co‐option for cyanobacterial symbiosis

New Phytologist, Volume 251, Issue 4, Page 2168-2185, August 2026.
The heterocyst‐rich Encephalartos natalensis cyanobacterial zone in coralloid root suggests co‐option of conserved symbiosis‐associated genes. This figure was created in BioRender (BioRender.com/https://BioRender.com/n3qveqc). Summary Plant‐cyanobacterial symbioses have evolved independently at least four times across land plants, yet their underlying ...
Cassandra Schoeman, Danielle Roodt, Amy Mc Menamin, Oliver Bezuidt, Choaro Dithugoe, Desré Pinard, Eshchar Mizrachi   +6 more
wiley   +1 more source

Scientists in power plays: How substantive were scientists' narratives during the COVID‐19 pandemic?

Policy Studies Journal, Volume 54, Issue 3, August 2026.
Abstract Scientists who provide expert advice must engage with policy processes. Little is known about whether and how scientists deal with the political dynamics of policy processes that are inherent to policymaking. We study this question by building on the policy dimension concept within the Narrative Policy Framework.
Jule Ksinsik, Caroline Schlaufer
wiley   +1 more source

Nanopesticides, a real breakthrough for agriculture?

Revista Bio Ciencias, 2017
The expansion of agriculture in the world has provoked, amongst others, the increase in the use of chemical substances for plague control. Scientific advances have shown that nanomaterials have innovative properties that can be used in the ...
Mendoza Cantú, A.
doaj   +1 more source