Results 61 to 70 of about 2,872 (189)

Decolorization of Ponceau Red 4R with TiO2/ZnO: Effect of calcination temperature and Fe addition

open access: yesEnvironmental 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

p- and m-Cresols emitted from estrous urine are reliable volatile chemical markers of ovulation in mares

open access: yes, 2012
Urine samples from 14 mares, belonging to five breeds, were collected at estrus and diestrus to search for estrous specific volatile compounds which could be used to determine ovulation time.
Mozuraitis, Raimondas,   +3 more
core   +1 more source

Mechanistic study of the formation of ring-retaining and ring-opening products from the oxidation of aromatic compounds under urban atmospheric conditions [PDF]

open access: yesAtmospheric Chemistry and Physics, 2019
Aromatic hydrocarbons make up a large fraction of anthropogenic volatile organic compounds and contribute significantly to the production of tropospheric ozone and secondary organic aerosol (SOA).
A. Zaytsev   +16 more
doaj   +1 more source

The Effect of the Aging Process of Polyamide 11 Used in Flexible Pipelines and Its Influence on the Permeability of Carbon Dioxide

open access: yesPolymer 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

Development of methods based on low-temperature partitioning (LTP) for monitoring cresols and chlorophenols in sewage sludge, soil, and water in column leaching

open access: yes, 2023
Cresols and chlorophenols are chemical contaminants that are potentially toxic to humans and can be found in sewage sludge. These chemical contaminants can migrate into the sludge-soil-water system when sludge is used as a conditioner for agricultural ...
Flaviano O. Silvério   +7 more
core   +1 more source

Recent advances in polymeric chemically amplified positive resists: Materials and design strategies

open access: yesSmart 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

Dapagliflozin Alters Plasma Metabolome in Patients With Type 1 Diabetes During Ketosis

open access: yesDiabetes, Obesity and Metabolism, EarlyView.
ABSTRACT Aims Use of sodium‐glucose cotransporter 2 inhibitors (SGLT2i) in patients with type 1 diabetes (T1D) is limited by increased risk of ketoacidosis. We aimed to determine metabolic pathways affected by SGLT2i treatment in adults with T1D during ketosis induced by insulin withdrawal.
Rosa Yang   +6 more
wiley   +1 more source

Post‐flight assessment of the OSIRIS‐REx Sample Return Capsule (SRC) for organic and other potential contaminants

open access: yesMeteoritics &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

open access: yesPeriodontology 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

DECOS and SCG Basis for an Occupational Standard Cresols (o-, m-, p-) [PDF]

open access: yes, 1998
Cresols occur as crystalline solid to colourless to yellowish liquid. They are slightly soluble in water and soluble in organic solvents. There are no data on the absorption of cresols in humans. In vivo animal data indicate that most of the administered
Stouten, H
core   +1 more source

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