Results 41 to 50 of about 10,783 (181)
Organics, 2021 para-Selective processes for the chlorination of phenols using sulphuryl chloride in the presence of various sulphur-containing catalysts have been successfully developed.
Keith Smith, Gamal A. El-Hiti
doaj +1 more source
Decolorization of Ponceau Red 4R with TiO2/ZnO: Effect of calcination temperature and Fe addition
Environmental Progress &Sustainable Energy, EarlyView.Abstract The photocatalytic degradation of azo dyes using semiconductor oxides has emerged as a promising strategy for wastewater remediation. In this study, pure, mixed, and Fe‐doped oxide catalysts based on Zinc Oxide and Titanium Dioxide were synthesized and evaluated for the degradation of Ponceau 4R under ultraviolet irradiation.
Stefani Castilhos +5 more
wiley +1 more source
Improving methodology to determine vitamin D3 in food supplements
Annals of Medicine, 2021 Introduction Nowadays, there is a trend to enrich food and food supplements (FS) with Vitamin D3. Economic operators who places FS on the market does not have to perform running safety trials, but only to comply with the food safety regulations ...
Carla Ferreira +5 more
doaj +1 more source
Polymer Engineering &Science, EarlyView.Field degradation inducing changes in the Polyamide 11 permeability. ABSTRACT This study investigates how long‐term natural aging affects the CO2 permeability of polyamide 11 (PA11) pressure sheaths recovered from decommissioned flexible risers. PA11 samples were extracted from two 18‐year‐old risers—a gas‐lift line and an oil‐production line—and ...
Antônio Pedro Andrade da Cunha Ponciano Gomes +3 more
wiley +1 more source
PLANTS, PEOPLE, PLANET, EarlyView.Conserving rare plants requires understanding the ecological interactions that enable their reproduction. Although most studied Cypripedium species are pollinated by bees, the pollinators of many slipper orchids remain undocumented. We show that Cypripedium yatabeanum is pollinated by female aphidophagous hoverflies despite sharing broadly similar ...
Kenji Suetsugu, Yudai Okuyama
wiley +1 more source
Marketing e cooperativismo em um município gaúcho: o caso da cooperativa de crédito cresol
Revista de Gestão e Organizações Cooperativas, 2018 O movimento cooperativista surgiu no séc. XIX e moldou o formato das relações comerciais e financeiras ao longo do tempo, provocando uma visão mais social dos negócios pelos clientes.
Fernanda Maria Henz +4 more
doaj +1 more source
An efficient and highly selective ortho-tert-butylation of p-cresol with methyl tert-butyl ether catalyzed by sulfonated ionic liquids [PDF]
Journal of the Serbian Chemical Society, 2014 A novel series of sulfonic acid-functionalized ionic liquids (SFILs) was found to act as efficient catalysts for ortho-tert-butylation of p-cresol with methyl tert-butyl ether (MTBE) as the tert-butylating agent without an added solvent.
Alamdari Reza Fareghi +2 more
doaj +1 more source
Recent advances in polymeric chemically amplified positive resists: Materials and design strategies
Smart Molecules, EarlyView.This review summarizes recent advances in the molecular design of positive chemically amplified resists, focusing on photoacid generators and polymer architectures. Key strategies for enhancing sensitivity—including self‐amplification effects, copolymerization of sensitive monomers, controlled polymerization, and photosensitized chemically amplified ...
Litao Zhou +3 more
wiley +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract Regolith samples from the carbonaceous asteroid Bennu were stowed and delivered to Earth in the OSIRIS‐REx spacecraft's Sample Return Capsule (SRC). We applied multiple analytical techniques to study the components of the post‐flight SRC, with a focus on assessing the conditions and any contaminants to which the Bennu samples were exposed ...
Scott A. Sandford +35 more
wiley +1 more source
Understanding extracellular vesicles in antiaging
Periodontology 2000, EarlyView.Abstract Background Aging is a multifactorial process marked by gradual cellular dysregulation, regulated by hallmarks, including genomic instability, mitochondrial dysregulation, and chronic inflammation. Extracellular vesicles (EVs), especially exosomes, have emerged as pivotal mediators of cell‐to‐cell communication with potential roles in both ...
Paras Ahmad +3 more
wiley +1 more source