Results 71 to 80 of about 14,737 (217)

Use of Ugi-three component reaction for the synthesis of poly(α-amino amide)s

, 2019
Multicomponent reactions (MCRs), in which three or more compounds react and form a product containing essentially all atoms of the starting reagents, have been thoroughly exploited in organic synthesis for preparing complex molecules.
Lecomte, Philippe, Stiernet, Pierre, De Winter, Julien, Debuigne, Antoine   +3 more
core   +1 more source

Psychological health mediates the association between diet and upper gastrointestinal cancer: a cross-sectional analysis from a large-scale population-based screening project

Cancer Biology & Medicine
Objective: Upper gastrointestinal (UGI) cancer, including esophageal and gastric cancers, poses a significant health burden. While unhealthy dietary patterns are a recognized risk factor for UGI cancer, the complex interplay with psychological health ...
Yueying Zhang, Shanrui Ma, Xinqing Li, Ru Chen, Shaoming Wang, Wenqiang Wei   +5 more
doaj   +1 more source

The PhenoChange network protocol for monitoring leaf phenology in tropical dry ecosystems using phenocameras

Methods in Ecology and Evolution, Volume 17, Issue 11, Page 3245-3259, November 2026.
Abstract Tropical dry ecosystems (TDEs) cover half of the tropics and play a key role in global carbon dynamics. TDEs present distinct canopy and ground layers that often exhibit contrasting phenological patterns. On‐the‐ground observations of phenology by the human eye, though valuable, may suffer from limited temporal resolution and observer biases ...
Desirée Marques Ramos, Francisco Maiato P. Gonçalves, Magna Soelma de Moura, Mário Marcos do Espírito‐Santo, Ítalo Antônio Cotta Coutinho, Vera De Cauwer, Bruna de Costa Alberton, Jonathan Muledi, Casey M. Ryan, Manuel Jundo Cachissapa, Millena C. N. Santana, Gabriel Ileni K. Uusiku, Antonia Mirelle Lopes Marques, Frances O'Leary, Renata D. Françoso, Nattália do Prado Neves, John L. Godlee, Maria Maraíza P. Santos, Leena Naftal, David Nkulu, Mathew Williams, Albert B. Phillimore, Andrew D. Richardson, Matúš Seči, Milcíades Chicomo, Natasha Wesely, David T. Milodowski, Sam B. Harrison, Ludovica Oddi, Consolata Siniscalco, Fabrícia Conceição M. Mota, Jurandy Almeida, Ricardo da Silva Torres, Mario B. B. Siqueira, Kyle G. Dexter, Leonor Patricia C. Morellato   +35 more
wiley   +1 more source

Enols as Feasible Acid Components in the Ugi Condensation

, 2016
Heterocyclic enols are used for the first time as acid components in an Ugi-type multicomponent condensation. For that purpose, we have chosen enols containing a Michael acceptor, in order to facilitate an irreversible rearrangement of the primary Ugi ...
Carlos F. Marcos (1580926), Ana G. Neo (2010589), Teresa G. Castellano (2010595), Stefano Marcaccini (2010592)   +3 more
core   +2 more sources

Design of Mechanically Agitated Fermenter for a Daily Ten Tons Ethanol Production from Cool- Feed Biomass

ENP Engineering Science Journal
This research designed a mechanically agitated fermenter that operates with the principles of heat exchanger, sustaining fermentation process in a conducive thermodynamic state which promotes product (ethanol) yield as well as its concentration (purity),
Fredrick Ugi, Benedict Ugi, Gloria Tamunotonye   +2 more
doaj   +1 more source

Essentially Indebted: Utilities, Regulation, and the Politics of Protection and Vulnerability

Antipode, Volume 58, Issue 6, November 2026.
ABSTRACT Capital‐intensive energy utilities exist through indebtedness, yet rising household utility debt is routinely framed as distinct from this essential nature of utilities and rather as a problem of consumer irresponsibility or regulatory failure.
Salma Elmallah, Veronica Jacome
wiley   +1 more source

Green Infrastructure Fluctuations in Urban Agglomeration of Shanxi Province, China: Implications for Controlling Ecological Crises

Land
The rapid urbanization process means that even moderate-sized cities can quickly become part of larger urban agglomerations, creating new urban zones.
Cheng Gong, Huijun Pang, Aruhan Olhnuud, Fan Hao, Feinan Lyu   +4 more
doaj   +1 more source

Features of the urban heat island (UHI) and land use in subtropical Hong Kong

, 2010
The 2010 Regional Conference of the International Geographical Union (IGU) and The Israeli National Committee for Geography (UGI), Tel Aviv, Israel, 12-16 July ...
Hart, MA, Siu, LW
core  

Synthesis of acylhydrazino-peptomers, a new class of peptidomimetics, by consecutive Ugi and hydrazino-Ugi reactions

, 2016
Herein we describe a versatile approach for the synthesis of acylhydrazino-peptomers, a new class of peptidomimetics. The key idea in this approach is based on a simple route using a one-pot hydrazino-Ugi four-component reaction followed by a ...
Angélica de Fátima S. Barreto, Carlos Kleber Z. Andrade, Veronica Alves dos Santos   +2 more
core   +1 more source

Million‐Year Scale Hydrothermal and Hydrocarbon Evolution Hosted Within Stratified Thermohydraulic Systems in Sedimented Ultraslow‐Spreading Settings, Svyatogor and Vestnesa Ridges

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Hydrothermal systems at ultraslow‐spreading ridges are poorly understood, especially where thick sediments overlay detachment faults. The International Ocean Discovery Program Expedition 403 obtained the longest sediment record in Atlantic‐Arctic ultraslow‐spreading systems, reaching ∼628 m below the seafloor.
Y. Sakai, Y. Fukamatsu, V. J. Clementi, Y. Rosenthal, J. Gruetzner, S. Bünz, A. Plaza‐Faverola, K. St. John, R. G. Lucchi, T. A. Ronge, O. Libman‐Roshal, L. Monito, Y. Liu, M. Iizuka, L. Duxbury, L. Haygood, O. Tadai, G.‐I. Uramoto, W. Lin, Expedition 403 Shipboard Scientists   +19 more
wiley   +1 more source