Results 131 to 140 of about 183,005 (293)

Role of Epoxide Functionalization of Amines for Development of Direct Air Capture Sorbents with High Cyclic Working Capacity at Low Desorption Temperatures

open access: yesAdvanced Science, EarlyView.
Appropriate butylene oxide (BO) functionalization of amines (polyethyleneimine (PEI1200 and PEI300) and tris(2‐aminoethyl)amine (TREN)) enables excellent cyclic working capacities (WCcyclic) at low desorption temperatures (40−70°C). Notably, 0.30BO‐PEI300‐SY and 0.54BO‐TREN‐SY show the highest WCcyclic at 45 and 40°C, respectively.
Joo Yeon Han   +10 more
wiley   +1 more source

PLESIOSAURS (DIAPSIDA, SAUROPTERYGIA) FROM LATE CRETACEOUS (LATE CAMPANIAN–EARLY MAASTRICHTIAN) MARGINAL MARINE ENVIRONMENTS FROM NORTH PATAGONIA

open access: yesPublicación Electrónica de la Asociación Paleontológica Argentina, 2015
During the late Campanian and early Maastrichtian, Northern Patagonia suffered the first stage of the Atlantic marine ingression that reached the Neuquén Basin. The Allen and La Colonia formations show the early stages of this change, and were deposited
José O´Gorman
doaj  

Multi‐scale Optimization on Interfacial Evaporative Cooling for Photovoltaic Performance Enhancement

open access: yesAdvanced Science, EarlyView.
This study presents a passive siphon‐driven interfacial evaporative cooling technology for photovoltaics. A multiscale multiphysics model is developed and validated experimentally. Results show that optimizing installation parameters reduces operating temperature by up to 22.3 °C and boosts power efficiency by 8.9%, offering a practical pathway for ...
Fuxiang Li   +5 more
wiley   +1 more source

EL DISTURBIO ANTRÓPICO EN LOS REGISTROS POLINICOS DE MONTAÑA DURANTE EL CUATERNARIO TARDÍO DEL NOROESTE ARGENTINO.

open access: yesPublicación Electrónica de la Asociación Paleontológica Argentina, 2018
Resumen. Para comprender el origen causal de las variaciones del paisaje y particularmente de las comunidades vegetales en los diferentes escenarios ambientales con larga historia de ocupación humana, como los ecosistemas de montaña del noroeste ...
Liliana C. Lupo   +6 more
doaj  

Mass‐Transport–Engineered CCM Architecture Employing MPL‐Free Carbon Paper and Graphene‐Coated Ni Foam Channels for High‐Temperature PEM Fuel Cells

open access: yesAdvanced Science, EarlyView.
A CCM‐based architectural strategy is introduced for high‐temperature PEM fuel cells, enabling MPL‐free carbon paper gas diffusion layers via decal‐transfer processing. By co‐engineering the CCM, GDL, and a G‐foam flow field, oxygen transport is enhanced while phosphoric‐acid leakage is suppressed, resulting in high power density and stable operation ...
Seongmin Cho   +6 more
wiley   +1 more source

ANÁLISIS Y MÉTODOS PALEOECOLÓGICOS PARA LA RECONSTRUCCIÓN DE COMUNIDADES DE BOSQUE Y ESTEPAS DE PATAGONIA, ARGENTINA

open access: yesPublicación Electrónica de la Asociación Paleontológica Argentina, 2018
Resumen. En este trabajo se discuten los diferentes aspectos metodológicos a tener en cuenta en los estudios paleoecológicos. Las consideraciones teóricas y metodológicas discutidas incluyen los siguientes aspectos: tipos de depósitos, procesos ...
María V. Mancini   +4 more
doaj  

One‐Dimensional RuIrTe Nanotubes with Amorphous Surface as a Highly Active and Stable Electrocatalyst Toward Oxygen Evolution Reaction in Acidic Media

open access: yesAdvanced Science, EarlyView.
A rational etching‐induced reconstruction strategy is demonstrated to fabricate one‐dimensional RuIrTe ternary nanotubes with a unique amorphous‐crystalline heterostructure. This hierarchical architecture synergistically optimizes mass transport and electronic configurations, delivering record‐breaking performance in proton exchange membrane water ...
Zhi Liang Zhao   +4 more
wiley   +1 more source

CENOZOIC (PRE-PLIOCENE) PALEOENVIRONMENTAL TRENDS BASED ON PALYNOMORPHS FROM THE COLORADO BASIN, ARGENTINA

open access: yesPublicación Electrónica de la Asociación Paleontológica Argentina, 2015
. Based on palynological studies, paleoclimatic trends were inferred for the Paleocene-Miocene of the marginal part of the Colorado Basin, Argentina. The data show warm and humid conditions during the Late Danian (Paleocene), a decline of temperature and
G. Raquel Guerstein   +3 more
doaj  

Environmental Insights and Sustainability Opportunities for Scaled‐Up MXene Production Without Etching

open access: yesAdvanced Science, EarlyView.
Through a systematic and comprehensive analysis of the environmental impacts for the emerging MXene synthesis pathways, this study presents process transformation and optimization opportunities for low‐carbon MXene production from laboratory to industrial scales.
Yushuai Huang   +6 more
wiley   +1 more source

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