Results 51 to 60 of about 5,629,756 (206)

Dependencia en energía de la producción de picos de escape en espectroscopia de fluorescencia de rayos-X dispersiva en energía

open access: yesRevista de Investigación de Física, 2015
Se presenta el modelo teórico para calcular la energía e intensidad relativa de los picos de escape correspondientes a los rayos-X característicos presentes en un espectro de fluorescencia de rayos-X dispersiva en energía (FRXDE).
Jorge A. Bravo Cabrejos
doaj   +1 more source

Rayos X, enculturación científica, autonomía y reflexión

open access: yesRevista Chilena de Pedagogía, 2019
Neste trabalho relatamos uma experiência didática concebida no âmbito de um Mestrado Profissional em Ensino de Física e inspirada na pedagogia de Paulo Freire para abordar o tema Raios X (matéria e radiações), visando o enculturamento científico a uma turma de estudantes do Curso Normal, futuros professores dos anos iniciais do Ensino Fundamental ...
Cilâine Verônica Teixeira   +2 more
openaire   +2 more sources

Antisense reduction in NADP‐ME in the C4 species Flaveria bidentis alters stomatal sensitivity to intercellular [CO2]

open access: yesNew Phytologist, Volume 250, Issue 3, Page 1585-1597, May 2026.
Summary Stomata have the crucial role of balancing the uptake of CO2 for photosynthesis and water loss via transpiration by adjusting their aperture. In C3 plants, coordination between photosynthesis and stomatal conductance can be disrupted by mutations in Calvin–Benson–Bassham (CBB) cycle expression, but it is not clear whether the disruption of the ...
Emmanuel L. Bernardo   +3 more
wiley   +1 more source

A Molecular Hybrid 2D/3D Carbon Allotrope: Synthesis of Adamanphene

open access: yesChemistryEurope, Volume 4, Issue 3, March 2026.
Adamanphene fuses diamond and graphene at the molecular level. An adamantane core anchors four hexabenzocoronene nanographenes into a rigid tetrahedral architecture, giving rise to a porous π‐stacked solid with electronically isolated chromophores and aggregation‐induced emission.
Marina Iglesias‐Rabadán   +3 more
wiley   +1 more source

Potential drivers of fast growth in Paulownia

open access: yesPLANTS, PEOPLE, PLANET, Volume 8, Issue 2, Page 516-529, March 2026.
Trees in the genus Paulownia play a crucial role in sustainable forestry, rural economic development, and carbon mitigation due to their rapid growth, exceptional hardwood properties, and prominent carbon sequestration capacity. This review highlights the societal value of Paulownia trees and synthesizes several potential drivers of extraordinarily ...
Yang Zhao, Marjorie R. Lundgren
wiley   +1 more source

Optimal Job Design and Information Elicitation

open access: yesThe RAND Journal of Economics, Volume 57, Issue 1, Page 176-204, Spring 2026.
ABSTRACT When managers rely on their subordinates for local information but cannot commit to how such information is used, the incentives for effort and information elicitation become intertwined. This incentive problem influences the firm's job design decision, that is, whether to assign all tasks in a job to one worker (“individual assignment”) or ...
Arijit Mukherjee   +2 more
wiley   +1 more source

A novel single‐cell NAD‐ME C4 subtype integrated with CAM and bicarbonate use in an aquatic plant

open access: yesNew Phytologist, Volume 249, Issue 5, Page 2386-2401, March 2026.
Summary Many plants maximize photosynthesis by using a CO2‐concentrating mechanism (CCM). Based on physiology, the freshwater plant Ottelia alismoides has three CCMs: C4 metabolism (NAD‐malic enzyme (NAD‐ME) subtype) and bicarbonate‐use during the day plus crassulacean acid metabolism (CAM) at night and lacks Kranz anatomy. Here, we combined a range of
Hong Sheng Jiang   +11 more
wiley   +1 more source

Historia de la medicina: un cincuentenario. – El descubrimiento de los rayos x

open access: yesRevista de la Facultad de Medicina, 1945
Entre los grandes descubrimientos que aprestigian a la inteligencia humana en el ocaso del siglo pasado, ocupa lugar de primera magnitud aquel realizado por Roentgen en el año 1895.
Carlos Trujillo Venegas
doaj  

Angiocardiología por rayos X

open access: yes, 2018
La radiología permite obtener una película radiográfica de la imagen de una parte del cuerpo humano, por su exposición a los rayos X. Cuando la radiación X atraviesa el objeto bajo estudio, sufre una atenuación que depende de la densidad y el espesor del objeto.
Bravo, Antonio J.   +10 more
openaire   +1 more source

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