Results 31 to 40 of about 878 (145)

Retro‐Hetero‐Michael Addition Strategies in Organic Synthesis

European Journal of Organic Chemistry, Volume 29, Issue 32, 24 August 2026.
In this review, synthetic approaches to carbo‐ and heterocyclic compounds, including natural products, published in the last 15 years (2011–2025) which have either relied upon or included a retro‐hetero‐Michael addition step at any stage are discussed.
Dina Scarpi, Ernesto G. Occhiato
wiley   +1 more source

PRESENCIA DE RESIDUOS Y CONTAMINANTES EN LECHE HUMANA

Revista Española de Salud Pública, 2002
La contaminación de la leche humana por xenobióticos es un problema generalizado a nivel mundial, que se ve afectado por las variaciones geográficas, climáticas, culturales y socioeconómicas de cada lugar. Las políticas de salud pública han enfrentado
Guadalupe Prado Flores, Rita Carabias Martínez, Encarna Rodríguez Gonzalo, Eliseo Herrero Hernández   +3 more
doaj   +2 more sources

Full‐pattern fitting of X‐ray powder diffraction data to determine allophane and organic matter contents in soils

Soil Science Society of America Journal, Volume 90, Issue 4, July/August 2026.
Abstract Full‐pattern fitting of X‐ray powder diffraction (XRPD) data using reference materials has attracted increasing attention as a high‐throughput method to determine the contents of long‐range‐ordered (i.e., crystalline) materials in soils. We hypothesized that this XRPD method can also be used to quantify short‐range‐ordered (SRO) materials with
Maya Hamaguchi, Kohei Kurokawa, Atsushi Nakao, Masayuki Tani, Hiroaki Shimada, Yuji Maejima, Morimaru Kida, Nobuhide Fujitake, Mayuko Seki, Junta Yanai   +9 more
wiley   +1 more source

The crystal structure of poly(ethylene furanoate) [PDF]

Polymer, 2016
Abstract The crystal structure of poly(ethylene furanoate) (PEF) has been determined using X-ray fiber diffraction (XRFD) combined with molecular modeling. Analysis of the XRFD data suggested the space group was P21, with a monoclinic unit cell where a = 5.784 A, b = 6.780 A, c = 20.296 A, and γ = 103.3°, giving a calculated unit cell density of the ...
Yimin Mao, Robert M. Kriegel, David G. Bucknall   +2 more
openaire   +1 more source

Curated set of tool compounds to probe PYK2 and FAK signaling in Alzheimer's disease

Alzheimer's &Dementia, Volume 22, Issue 5, May 2026.
Abstract INTRODUCTION Proline‐rich tyrosine kinase 2 (PYK2) and focal adhesion kinase (FAK) are non‐receptor tyrosine kinases implicated in Alzheimer's disease (AD), but their functional role in microglia remains understudied. Selective pharmacological tools are required for preclinical studies leading to translational therapeutic development.
Pathum M. Weerawarna, Cynthia D. Jesudason, Karen L. Lobb, Emily R. Mason, Xiaoping Gu, Shaoyou Chu, Timothy I Richardson   +6 more
wiley   +1 more source

Highly efficient mechanochemical depolymerisation of bio-based polyethylene furanoate and polybutylene furanoate

RSC Sustainability
We present a mechanochemical protocol for the efficient depolymerisation of bio-based poly(ethylene furanoate) (PEF) and poly(butylene furanoate) (PBF) as alternatives to commodity plastics such as poly(ethylene terephthalate) (PET).
Divya Jain, Florian Cramer, Pauline Shamraienko, Hans-Joachim Drexler, Brigitte Voit, Torsten Beweries   +5 more
openaire   +1 more source

Bean‐to‐Bar Chocolate: An Integrative Framework Linking Terroir, Biochemistry, Processing, and Sensory Expression

Comprehensive Reviews in Food Science and Food Safety, Volume 25, Issue 3, May 2026.
ABSTRACT The bean‐to‐bar movement, which emerged in the United States in 1996, represents a transformative approach to chocolate production and consumption by integrating craftsmanship, sustainability, and gastronomic authenticity. This study conducted a literature review using the narrative approach, as the object of investigation encompasses both ...
Paola Romanova do Nascimento Costa, Maico da Silva Silveira, Júlio César DoVale, Paulo Henrique Machado de Sousa   +3 more
wiley   +1 more source

Características estruturais de ácidos húmicos isolados de solos com adição de resíduos orgânicos de origem urbana: composição elementar, análise de RMN 13C e Pi-CG/EM

Revista Brasileira de Ciência do Solo, 2002
Foram avaliadas as alterações nas características estruturais de ácidos húmicos (AH) decorrentes da adição de matéria orgânica de resíduos urbanos. Os AH foram extraídos da camada superficial (0-20 cm) de um Argissolo Vermelho-Amarelo (Seropédica, RJ) e ...
L. P. Canellas, A. A. Moraes, V. M. Rumjanek, M. R. Garcia, F. Guridi, G. A. Santos, A. C. X. Velloso, R. Braz-Filho   +7 more
doaj   +1 more source

Nitroxide‐Mediated Fluorescence Quenching: Synthesis and Applications for the Detection of ROS in Biological Systems

Advanced Sensor Research, Volume 5, Issue 3, March 2026.
ABSTRACT Profluorescent nitroxides (PFNs) have established themselves as powerful tools for monitoring oxidative processes and subcellular redox dynamics by reactive oxygen species (ROS). Their characteristic “off–on” behavior arises from the efficient, proximity‐driven quenching of covalently bound fluorophores by paramagnetic nitroxide radicals ...
Haider N. Sultani, Ludger A. Wessjohann, Daniel G. Rivera, Dariush Hinderberger, Bernhard Westermann   +4 more
wiley   +1 more source

Emisión de dioxinas y furanos (PCDD/PCDF) en Colombia: evaluacion y diagnóstico

, 2019
Se presentan la proyección y el diagnóstico sobre el estado de emisiones de dioxinas y furanos en Colombia para el año 2010, a partir de la revisión y actualización de los resultados que arrojó el primer inventario nacional de fuentes y vectores de ...
García Ubaque, Juan Carlos, Vaca Bohórquez, Martha Lucía, García Ubaque, César Augusto   +2 more
core   +1 more source