Results 111 to 120 of about 236,619 (301)

Synthesis of Cysteine–Fluorophore Conjugates by Visible‐Light‐Promoted Thiol–Ene Coupling Using Organic Photocatalysts

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
Cysteine–fluorophore conjugates were efficiently prepared through a visible‐light‐driven thiol–ene approach employing solely organic photocatalysts. The reaction proceeds under mild, metal‐free conditions. The fluorophore scope includes mono‐ and dialkene‐functionalized naphthalene, naphthalimide, and aromatic diimide derivatives.
Julieth Bellaizac‐Riascos   +4 more
wiley   +1 more source

Fruticultura y apicultura, dos sectores vinculados – análisis de competitividad del sector proveedor del servicio de polinización en Norpatagonia [PDF]

open access: yes, 2014
Fil: Garcia Sartor, Carolina E. Universidad Nacional de Río Negro. ArgentinaFil: Ugalde Carlos. Instituto Nacional de Tecnología Industrial. ArgentinaLa competitividad ha pasado a ser una de las principales preocupaciones de los Gobiernos y de los ...
García Sartor, Carolina E.   +1 more
core  

Light‐Modulated Exchange Bias in Multiferroic Heterostructures

open access: yesElectron, EarlyView.
In this article, exchange bias and magnetization are modulated with visible light at room temperature in PMN‐PZT/FeGa/IrMn multiferroic heterostructures. Photostrictive effect is the main mechanism leading to the modulation of magnetic anisotropy and interfacial exchange bias coupling between the ferromagnetic and antiferromagnetic layers.
Huan Tan   +9 more
wiley   +1 more source

Enhancing Students’ Interest in Physics Concepts with a Low-Cost STEM Tool Focused on Motivation in Rural Areas of Developing Countries

open access: yesEducation Sciences
Physics concepts are considered an essential component of STEM (science, technology, engineering, and mathematics) education and fundamental for economic and technological development in the world. However, there can be student academic underperformance,
René Flores-Godínez   +4 more
doaj   +1 more source

Acuerdo marco para la competitividad de la cadena del arroz [PDF]

open access: yes, 1998
Colección Documentos IICA Serie Competitividad (IICA) no. 7.El presente acuerdo marcó el punto de partida de un proceso dinámico de concertación, dirigido a alcanzar estudios superiores de competitividad sostenible, en un entorno nacional e internacional

core  

Directrices para el estudio de competitividad del sector de la acuicultura en Colombia: acuerdo de competitividad del sector de la acuicultura [PDF]

open access: yes, 1998
Colección Documentos Serie Competitividad (IICA) no. 9.El objetivo general consiste en producir un inventario del estado del conocimiento en cada una de las áreas del Temario de la Declaracion de Voluntad, firmada entre el Ministerio de Agricultura y la ...
Soto, Juan   +3 more
core  

Ciencia, tecnología e innovación

open access: yes
"La experiencia internacional muestra que los desarrollos en innovación y la adopción y adaptación de productos y procesos a partir de la ciencia y la tecnología han sido fundamentales para elevar la competitividad.
Consejo Privado de Competitividad
core   +1 more source

Observatorio de competitividad : Situación competitiva de Bogotá en el 2005. N. 4. Septiembre de 2005

open access: yes, 2005
La Cámara de Comercio de Bogotá, pública el Observatorio de Competitividad de Bogotá No. 4 elaborado por la Dirección de Estudios e Investigaciones de la Vicepresidencia de Gestión Cívica y Social, en el que se evalúa la situación competitiva de Bogotá ...
Cámara de Comercio de Bogotá
core  

New geochronological constraints on Late Pleistocene glaciation in the southern Cadí Massif, SE Pyrenees

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT The Cadí Massif (42°17′09″ N, 1°38′11″ E; 2649 m a.s.l.) in the southeastern Pyrenees preserves clear evidence of Late Pleistocene glaciation, although previous research has focused almost exclusively on its northern slope. By contrast, the southern slope has remained largely unexplored.
M. Oliva   +5 more
wiley   +1 more source

Controlling the Center of Mass Motion of Levitated Particles Using Structured Wavefronts

open access: yesLaser &Photonics Reviews, EarlyView.
Optically levitated particles have great potential for quantum‐enhanced sensing. Precise control of the trapping beam is crucial to improve the stability and confinement of these systems. Here, we study how structured wavefronts can be used to control the center‐of‐mass motion of levitated particles, enhancing trap stiffness and enabling stable ...
Shah Jee Rahman   +7 more
wiley   +1 more source

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