Results 111 to 120 of about 340,661 (328)

Hidden Diradical: Conformational Switch for Solvatochromic NIR Emission With Unity Quantum Yield in Thiele's Hydrocarbon

Angewandte Chemie, EarlyView.
Halogen substitution controls a conformational switch between a folded closed‐shell and a flat singlet‐diradical conformer in an air‐stable Thiele‐diradical. This conformational switch allows for near‐unity photoluminescence quantum yield with a large Stokes shift, solvatochromism, and a long‐lived excited state.
Matteo Bevilacqua, Mattia Reato, Federico Cilento, Claudia Graiff, Sabrina Antonello, Luca Schio, Alessandro Aliprandi, Cristina Tubaro, Lorenzo Franco, Martina Dell'Angela, Dominik Munz, Marco Baron   +11 more
wiley   +2 more sources

Livestock Tango: U.S. and Latin America Dance Together, but Who Will Lead?

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT This study examines the competitiveness between Latin American and U.S. livestock and meat sectors. We employ a computable general equilibrium modeling framework to evaluate two scenarios: coordinated improvements in Latin American productivity, transport efficiency, and market access (Scenario I), and the minimum productivity gains required ...
Taís C. Menezes, Amanda M. Countryman, Dustin L. Pendell   +2 more
wiley   +1 more source

Total Synthesis of (+)‐Melonine and (+)‐N4‐Oxy Melonine Enabled by an Intramolecular Alkene Diamination Reaction

Angewandte Chemie, EarlyView.
A complexity‐generating intramolecular alkene diamination constitutes the pivotal step in the enantioselective synthesis of the title natural products featuring a strained, cage‐like pentacyclic architecture. Abstract Among more than four thousand monoterpene indole alkaloids (MIAs) isolated to date, only a few feature a 2,2,3‐trisubstituted indoline ...
Vincent Goëlo, Qian Wang, Jieping Zhu
wiley   +2 more sources

SAMUDRA Report, No. 50, August 2008 [PDF]

, 2008
Report: Rights-based fishing - Flagging rights, realizing responsibilities. Senegal: Artisanal fisheries - A health check. Analysis: Fuel prices - Fishing in times of high prices. Panama: Protected areas - Mother earth, mother sea. Review: Films -

core  

The Role of Coordination Mechanisms and Transaction Costs Promoting Sustainability Performance in Agri‐Food Supply Chains: Evidence From Ecuador

Agribusiness, EarlyView.
ABSTRACT Social tensions and resource depletion pose significant challenges to the agri‐food sector, highlighting the need for coordinated strategies to ensure sustainability in supply chains. Despite its critical importance, the relationship between coordination mechanisms and sustainability performance remains underexplored.
Carlos Moreno‐Miranda, Liesbeth Dries
wiley   +1 more source

State of the ant: how broad is our recent knowledge of Neotropical ant behavior?

Frontiers in Insect Science
Over the years, most scholarly published papers have studied vertebrates, despite invertebrates’ higher species diversity and number of individuals. This has led to an inaccurate representation of global biodiversity patterns in scientific publications ...
Rosannette Quesada-Hidalgo, Rosannette Quesada-Hidalgo, Yorlenis González, Dumas Gálvez, Dumas Gálvez, Dumas Gálvez, Peter R. Marting, Armando Castillo-Pimentel, Armando Castillo-Pimentel, Armando Castillo-Pimentel, Jane Aguilar, Stephen Cox, Carrie Smith, Sabrina Amador-Vargas, Sabrina Amador-Vargas   +14 more
doaj   +1 more source

Assessing Agricultural Green Total Factor Productivity in Latin America

Agribusiness, EarlyView.
ABSTRACT The agricultural sector in Latin America plays a vital role in ensuring food security while impacting the environment. However, there remains a lack of analysis regarding the inputs responsible for pollution within its sub‐technologies. Hence, this article aims to assess agricultural green total factor productivity (TFP) through a novel ...
Tianxiang Li, Vanessa Ormeño‐Candelario, Xueli Chen   +2 more
wiley   +1 more source

Application of convolutional neural networks for surface discontinuities detection in shielded metal arc welding process

Frontiers in Robotics and AI
Detecting surface discontinuities in welds is essential to ensure the structural integrity of welded elements. This study addresses the limitations of manual visual inspection in shielded metal arc welding by applying convolutional neural networks for ...
Elisa Elizabeth Mendieta, Hector Quintero, Cesar Pinzon-Acosta, Cesar Pinzon-Acosta   +3 more
doaj   +1 more source

Field notes on findings of threatened amphibian species in the central mountain range of western Panama [PDF]

, 2012
During field work along a transect in the Cordillera Central of western Panama between 2008 and 2010, we detected several populations of amphibian species which are considered as “Endangered” or “Critically Endangered” by the IUCN.
Carrizo, Arcadio, Hertz, Andreas, Köhler, Gunther, Lotzkat, Sebastian, Ponce, Marcos, Streit, Bruno   +5 more
core  

Automatic Determination of Quasicrystalline Patterns from Microscopy Images

Advanced Intelligent Discovery, EarlyView.
This work introduces a user‐friendly machine learning tool to automatically extract and visualize quasicrystalline tiling patterns from atomically resolved microscopy images. It uses feature clustering, nearest‐neighbor analysis, and support vector machines. The method is broadly applicable to various quasicrystalline systems and is released as part of
Tano Kim Kender, Marco Corrias, Cesare Franchini   +2 more
wiley   +1 more source