Results 51 to 60 of about 397,580 (207)

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

Condiciones ambientales. Equipos de protección personal [PDF]

, 1986
Unidad 3 de la serie “Instalaciones electricas domiciliarias. Seguridad industrial” en la que se describe el medio ambiente de trabajo, condiciones ambientales adecuadas, intensidades peligrosas, su influencia en el cuerpo humano y la forma de ...
Angel Correa, Gonzalo
core  

Trehalose 6‐phosphate – a central regulator at the crossroads of sugar signalling, metabolism, and development

New Phytologist, Volume 248, Issue 5, Page 2243-2250, December 2025.
Summary In mammals, blood sugar levels are tightly controlled by two hormones: insulin and glucagon. In flowering plants, a comparable regulatory mechanism exists, mediated by the sugar‐signalling molecule trehalose 6‐phosphate (Tre6P). Similar to insulin, Tre6P functions as a signal and negative feedback regulator of sucrose, the main transport sugar ...
Franziska Fichtner
wiley   +1 more source

Wound healing activity of Ullucus tuberosus, an Andean tuber crop

Asian Pacific Journal of Tropical Biomedicine, 2017
Objective: This study was designed to investigate the wound healing activity of aqueous extracts of Ullucus tuberosus (U. tuberosus) using in vitro models. Methods: Lyophilized pulp and acetone extracts of U.
Nathalie Heil, Karent Bravo, Andrés Montoya, Sara Robledo, Edison Osorio   +4 more
doaj   +1 more source

Liberación de sustancias en células senescentes [PDF]

, 2014
La invención trata de nanodispositivos para la liberación controlada de sustancias que comprenden un soporte recubierto por oligosacáridos, donde dichos oligosacáridos comprenden al menos 3 unidades de monosacáridos, y donde al menos uno de los ...
Agostini, Alessandro, Manguan-García, Cristina, Marcos, M. Dolores, Martínez Máñez, Ramón, Mondragón Martínez, Laura, Moreno Torres, Marta, Murguía, José Ramón, Perona Abellón, Rosario, Sancenón, Félix, Soto, Joan   +9 more
core  

Arabidopsis thaliana exhibits wide within‐species variation in tolerance to boron limitation and root and shoot trait resilience associate with a pleiotropic locus

New Phytologist, Volume 248, Issue 5, Page 2444-2465, December 2025.
Summary To improve plant tolerance to suboptimal availability of the micronutrient boron (B), it is crucial to understand the mechanisms plants have evolved to tolerate B‐limited conditions. We assessed temporal physiological, ionomic and molecular responses to B deficiency across 185 Arabidopsis thaliana accessions grown in soil‐substrate in an ...
Thomas D. Alcock, Manuela Désirée Bienert, Astrid Junker, Rhonda C. Meyer, Henning Tschiersch, Sreelekha Kudamala, Nicolaus von Wirén, Thomas Altmann, Gerd Patrick Bienert   +8 more
wiley   +1 more source

Estudiantes y sustancias psicoactivas

, 2022
Se exponen los resultados de un estudio epidemiológico y de percepciones sobre el consumo de drogas en la población estudiantil de pregrado de la Universidad Tecnológica de Pereira, con base en una encuesta validada a nivel Latinoamericano. Propuesta por la CICAD/OEA, que permite comparar los resultados institucionales con los de otras universidades ...
Giraldo Herrera, John Harold, Bedoya Sánchez, José Rubiel, Restrepo Mesa, Maribel   +2 more
openaire   +2 more sources

Physical constraints and environmental factors shape phloem anatomical traits in woody angiosperm species

New Phytologist, Volume 248, Issue 5, Page 2316-2330, December 2025.
Summary Xylem trait studies have enhanced our understanding of how plants strategically adapt their morphological and anatomical features to diverse climates. Despite the importance of the phloem in plant functioning, similar studies of phloem traits are lacking.
Yan Wang, Johannes Liesche, Alan Crivellaro, Jiří Doležal, Jan Altman, Donato Chiatante, Anastazija Dimitrova, Zexin Fan, Peili Fu, Félix Forest, Jozica Gričar, Patrick Heuret, Sandrine Isnard, Olivier Maurin, Antonio Montagnoli, Cyrille B. K. Rathgeber, Enkhchimeg Tsedensodnom, Santiago Trueba, Yann Salmon   +18 more
wiley   +1 more source

Adolescencia, grupo de iguales y consumo de sustancias: Un estudio descriptivo y relacional [PDF]

, 2007
Esta investigación fue financiada gracias al Convenio de colaboración firmado entre el Ministerio de Sanidad y Consumo (Dirección General de Salud Pública) y la Universidad de SevillaCon el objetivo de describir la frecuencia con la que chicos y chicas ...
Moreno Rodríguez, María del Carmen, Muñoz Tinoco, María Victoria, Pérez Moreno, Pedro Juan, Sánchez Queija, María Inmaculada   +3 more
core  

Impact of C18 Epimerization of Indole‐ and Pyrazole‐Fused 18β‐Glycyrrhetinic Acid Derivatives on PTP1B and TCPTP Inhibitory Activity: Synthesis, In Vitro, and In Silico Studies

ChemMedChem, Volume 20, Issue 22, November 18, 2025.
The indole derivative (FC‐114) and the N‐phenylpyrazole (FC‐122) of glycyrrhetinic acid are both potent inhibitors of the Protein Tyrosine Phosphatase 1B, with IC50 values of 0.48 μM and 1.15 μM, respectively. However, their activity decreases by up to four times when the 18β‐H position is epimerized to 18α‐H or when the carbonyl group at the C11 ...
Ledy De‐la‐Cruz‐Martínez, Rosendo Martínez‐Arellano, Mitzi López‐Sánchez, José G. Alvarado‐Rodríguez, Jesús Martin Torres‐Valencia, David Equihua‐González, Julio‐César Almanza‐Pérez, Jaime Pérez‐Villanueva, Martín González‐Andrade, José C. Páez‐Franco, Francisco Cortés‐Benítez   +10 more
wiley   +1 more source