Results 41 to 50 of about 3,407,736 (336)

Effect of Alkaline Salts on Calcium Sulfoaluminate Cement Hydration

open access: yesMolecules, 2021
This work analyzes the effect of the presence of 5 wt.% of solid sodium salts (Na2SO4, Na2CO3, and Na2SiO3) on calcium sulfoaluminate cement (CSA) hydration, addresses hydration kinetics; 2-, 28-, and 90-d mechanical strength, and reaction product ...
Luís Urbano D. Tambara Júnior   +5 more
doaj   +1 more source

Los valores de Castilla [PDF]

open access: yes, 1928
Copia digital. Valladolid : Junta de Castilla y León.
García Vedoya, Angel, 1897-1936
core   +1 more source

Fabrication of Superinsulating Poly(Urethane‐Isocyanurate) Aerogels Derived from Upcycled Polycarbonate

open access: yesAdvanced Sustainable Systems, EarlyView.
Bisphenol‐A polycarbonate is upcycled via a simple one‐pot reaction into an aromatic Mannich polyol, which serves as a precursor for fabricating poly(urethane‐isocyanurate) (PUR‐PIR) aerogels. PUR‐PIR aerogels, prepared with different isocyanate indices, exhibit high porosities, high specific surface areas, ultralow thermal conductivity, and excellent ...
Ivona Glišić   +5 more
wiley   +1 more source

Fluorescent Chitosan Hydrogels Based on Biomass‐Derived Carbon Dots for Toxic Aromatic Detection

open access: yesAdvanced Sustainable Systems, EarlyView.
Carbon dots made from food waste via a microwave–ultrasound method show strong, pH‐stable fluorescence. Thermal pretreatment enhances their optical properties. Incorporated into chitosan hydrogels, these dots form reusable sensors for detecting aromatic pollutants in water.
Imane Haddadou   +4 more
wiley   +1 more source

Intermediarios en el Mercado de Valores

open access: yesDerecho PUCP, 1973
No contiene ...
Fernando Vidal Ramírez
doaj  

Valores. Identidades y globalización [PDF]

open access: yes, 2016
La conferencia científica se orienta principalmente a los Grados de Trabajo Social, Criminología y Estudios de Asia Oriental de la Universidad de Málaga. Sin embargo, por el modo antropológico-social en que se propone analizar e interpretar la estructura
Mandly Robles, Antonio
core  

Pulsed Laser Synthesis of Carbon Nanostructures from Organic Molecular Liquids: Structure, Kinetics and Photophysical Properties

open access: yesAdvanced Science, EarlyView.
The non‐focused nanosecond pulsed laser irradiation of aromatic liquids produces amorphous carbon nanodots (CNDs) or curved‐graphene quantum dots (c‐GQDs) by surface‐catalyzed 0‐order reactions under kinetic control. C hybridization partially changes from sp2 to sp3. O‐based groups passivate the surface.
Antonio Ribeiro‐González   +8 more
wiley   +1 more source

Información Filosófica

open access: yesIdeas y Valores, 1980
Décimo Congreso Interamericano de Filosofía /  Quinto Simposio Latinoamericano de Lógica Matemática / Cuarto Foro Nacional de Filosofía / Segundo Coloquio Colombiano de Filosofía / Primer Encuentro Nacional de Investigadores de Filosofía / Sociedad ...
Valores Ideas y
doaj  

El campo patrimonial y museístico: un espacio cultural conflictivo

open access: yesRevista de Dialectología y Tradiciones Populares, 2010
Los procesos de patrimonialización y musealización de la cultura no responden a criterios históricos o estéticos, sino identitarios. No atañen a científicos, especialistas y políticos solamente, sino a colectivos sociales.
Iñaki Arrieta Urtizberea
doaj   +1 more source

Liderazgo empresarial por valores [PDF]

open access: yes, 2013
El propósito de este ensayo es mostrar alguna información respecto a las características que debe tener un líder empresarial, capaz de enfrentar retos, contribuyendo a la construcción de un mejor ambiente laboral que a la vez permita alcanzar los ...
Moreno Hernández, Vivian Rocío
core  

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