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Carlos E. B. Toazza; Fernando C. Leal; Caroline Marques; Grazielle Oliveira; Fabiane O. Farias; André L. D. Belan; Natalicio F. Leite; Marcos R. Mafra; Luciana Igarashi‐Mafra; Maria Lucia Masson
... Lemongrasses are known and used worldwide due to several benefits conferred to them regarding the high content of essential oils and other phenolic compounds, which are essential and nonessential compounds that occur in nature, are part of the food chain and present several benefits on human health. The obtaining of phenolic compounds from natural matrices requires the development of effective pro ...
COVID-19 infection; acetic acid; acetone; aspartic acid; cellobiose; formic acid; fructose; glucose; glycolic acid; herbal medicines; hot water treatment; hydrolysis; lactic acid; medicine; subcritical water treatment; temperature; threonine; total organic carbon
Abstract:
... Herbal medicine wastes (HMWs) are byproducts of medicine factories, which are mainly landfilled for their environmental problems. Only bearing in mind the contamination and concerns caused by the COVID-19 pandemic and environmental emissions, the worth of herbal medicine wastes management and conversion to green products can be understood. In this work, subcritical water treatment was carried out ...
... Acetic acid, a model compound of bio-oil, was chosen to investigate the H₂ production from steam reforming reaction using Pt and Ni catalysts supported on ZrO₂. Ni crystallite sizes decreased with addition of Pt (from 23 to 15 nm), increasing the metallic dispersion (from 4.4 to 6.5%). A spillover effect was identified in bimetallic catalysts and caused a significant decrease of Ni reduction tempe ...
... Insulin-like growth factors 1 and 2 (IGF-1 and IGF-2) are important biomarkers in research and diagnosis of growth disorders. Quantitative analysis is performed using various ligand-binding assays or enzymatic digestion LC-MS/MS methods, whose widespread adoption is hampered by time-consuming sample preparation procedures. We present a simple and fast antibody-free LC-MS/MS method for the quantifi ...
acetaldehyde; acetic acid; acetone; air pollution; carbon dioxide; commercialization; ethanol; formaldehyde; human health; irradiation; mass transfer; mineralization; model validation; models; oxidation; photocatalysis; pollutants; reaction mechanisms; relative humidity; risk; silica
Abstract:
... Photocatalytic oxidation is a promising technology to control air pollution. However, the formation of hazardous by-products hinders the commercialization application of this technology. This paper reports the development of a novel by-products predictive model considering the mass transfer of the pollutant in the gas phase and kinetic reaction in the solid phase. Two challenge compounds from keto ...
... Regenerable NiO/NaF catalysts break the limitation that catalyst with low specific surface area is difficult to obtain high catalytic activity. In this paper, we investigated the feasibility and universal applicability of hydrogen evolution from different oxygen-containing volatile organic compounds (OVOCs) such as methanol, formaldehyde, formic acid, ethanol, acetic acid, acetone and ethyl acetat ...
acetic acid; acetone; acetonitrile; air quality; chlorobenzene; data collection; environment; ethyl acetate; ethylene dichloride; ozone; styrene; time series analysis; toluene; China
Abstract:
... Fast and comprehensive monitoring of VOCs, required for air quality management in large-scale chemical industrial parks in China, cannot be accomplished by stationary measurements using conventional GC-FID or GC–MS alone due to their low temporal resolutions and limited detectable ranges. Novel direct-inlet mass spectrometry (DI-MS) has been widely applied for real-time monitoring of VOCs. To veri ...
... To investigate the use of yeasts and lactic acid bacteria from natural kefir grain in bread making and its effects on dough and bread quality. The kefir grains were treated with different food‐based solutions to enrich the yeast content. Three kefir samples were produced with the treated grains (KAL and SIT) and the control (KEF) kefir grains (untreated). The yeasts isolated from the kefir samples ...
... At 30 °C, in the presence of Amberlyst-15 as a catalyst, a tandem sequence was implemented by which a pool of innocuous reactants (isopropenyl acetate, acetic acid and acetone) allowed upgrading of glycerol through selective acetylation and acetalization processes. The study provided evidence for the occurrence of multiple concomitant reactions. Isopropenyl acetate acted as a transesterification a ...
... Conversion of biomass tar to useful hydrogen-rich syngas will solve environmental issues related to tar emission as well as increase the overall efficiency of biomass conversion. There are various catalysts to achieve that. In this study, La₁₋ₓCeₓNi₀.₈Fe₀.₂O₃ (0 ≤ x ≤ 1) is selected, and acetic acid has been used as a biomass tar model. Fixed-bed reactor was used for this investigation, while the ...
... The antioxidant capacity is the combined free radical scavenging effect of all antioxidant compounds found in the studied system. There is a growing need for accurate, numerical determination of this capacity (for easier comparison), so there are many analytical procedures, methods, and measurement systems available to researchers. Neither one is able to model the totality of real, naturally occur ...
Ewelina Węsierska; Joanna Sobolewska-Zielińska; Małgorzata Pasternak; Katarzyna Niemczyńska-Wróbel; Robert Gąsior; Krzysztof Wojtycza; Henryk Pustkowiak; Iwona Duda; Władysław Migdał
... The aim of study was to compare the biochemical properties affecting the nutritional quality, safety, and aroma of dry-cured products manufactured from valuable meat of rare native pig breeds: Pulawska (Pul) and Zlotnicka Spotted (ZS). The count of lactic acid bacteria (4.4 log cfu/g) and the release of palmitic (23.1% and 25.9%), oleic (44.1% and 42.2%), and linoleic acids (8.3% and 7.8%), as wel ...
acetic acid; acetone; carbon dioxide; catalysts; catalytic activity; hydrogen production; kinetics; methane; models; process design; steam; temperature
Abstract:
... A kinetic model of acetic acid steam reforming is presented in this work on Co-based catalysts, accounting for the products distribution due to the main and side reactions. The Cr-promoted catalyst exhibited enhanced hydrogen yield and reduced methane selectivity in comparison to the chromium-free samples. The kinetic study was carried out in the presence of the chromium-containing catalyst betwee ...
... A lignin-based gel (AL-PE gel) was obtained from hardwood acetic acid lignin (AL) and poly(ethylene glycol) diglycidyl ether (PE) as a cross-linker at a high AL concentration, while the reaction at a lower AL concentration yielded an amphipathic derivative (am-AL-PE). The gel has been reported to swell in aqueous ethanol but shrink in pure water and ethanol. In the present work, swelling behaviors ...
... Ethylene vinyl acetate (EVA), commonly used to encapsulate photovoltaic (PV) modules, deteriorates on prolonged exposure to sunlight. In this work, fresh and deteriorated EVA samples prepared by UV irradiation (500 W m⁻²) over different periods (0–168 h) are characterized by conventional elemental analysis, microscopic observations, Fourier transform infrared (FT-IR) spectroscopy, and thermogravim ...
Antonio Manco; Federico Brilli; Daniela Famulari; Daniele Gasbarra; Beniamino Gioli; Luca Vitale; Paul di Tommasi; Benjamin Loubet; Carmen Arena; Vincenzo Magliulo
... Climate change will affect the growing season and increase the occurrence of extreme stressful events, thus altering crop phenological phases and the associated emission of biogenic volatile organic compounds (BVOC). BVOC exchange has been poorly investigated in field crops, especially in the Mediterranean area. In this study we report continuous measurements of BVOC fluxes and CO₂ net ecosystem e ...
... Mosquito salivary glands (SGs) are a requisite gateway organ for the transmission of insect-borne pathogens. Disease-causing agents, including viruses and the Plasmodium parasites that cause malaria, accumulate in the secretory cavities of SG cells. Here, they are poised for transmission to their vertebrate hosts during a subsequent blood meal. As adult glands form as an elaboration of larval SG d ...
... The cleanest form of energy, i.e., biohydrogen, and advanced biofuel, i.e., biobutanol, were produced from the organic fraction of municipal solid waste (OFMSW). Ethanol as a byproduct of this process was used for the pretreatment of this substrate, and this pretreatment was improved by other process byproducts, i.e., acetic acid and butyric acid. The pretreatment was conducted with 85% ethanol an ...
... Fabricating of economical transitional metal oxide-based materials with satisfied low-temperature catalytic performance and application perspective is still a challenge in deep degradation of VOCs. Here, Mn-Cu bimetallic oxides were facilely prepared by one-step hydrothermal-redox method, which displayed much higher catalytic activity in toluene oxidation than those synthesized by hydrolysis-drive ...
... In the present study, organic matter and indium were fully recycled from discarded LCD panels by microwave extraction - nitrogen pyrolysis - vacuum reduction. Triphenyl phosphate, an environmentally friendly halogen-free flame retardant, was extracted from the polarizing film using microwave extraction technology. The extraction rate under optimized conditions (acetone, 55 °C, 20 min, 1:50) was 95 ...