Archives: Peer-Reviewed Studies

Combined untargeted and targeted fingerprinting with comprehensive two-dimensional chromatography for volatiles and ripening indicators in olive oil

Authors: Federico Magagna, Lucia Valverde-Som, Cristina Ruíz-Samblás, Luis Cuadros-Rodríguez, Stephen E. Reichenbach, Carlo Bicchi, Chiara Cordero Abstract Comprehensive two-dimensional gas chromatography (GC × GC) is the most effective multidimensional separation technique for in-depth investigations of complex samples of volatiles (VOC) in food. However, each analytical run produces dense, multi-dimensional data, so elaboration and interpretation of chemical information …

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Assessing spatial and temporal variability of acid-extractable organics in oil sands process-affected waters

Authors: Richard A. Frank, Craig B. Milestone, Steve J. Rowland, John V. Headley, Richard J. Kavanagh, Sabine K. Lengger, Alan G. Scarlett, Charles E. West, Kerry M. Peru, L. Mark Hewitt Abstract The acid-extractable organic compounds (AEOs), including naphthenic acids (NAs), present within oil sands process-affected water (OSPW) receive great attention due to their known …

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Occurrences, sources and risk assessment of short- and medium-chain chlorinated paraffins in sediments from the middle reaches of the Yellow River, China

Authors: Lin Qiao, Dan Xia, Lirong Gao, Huiting Huang, Minghui Zheng Abstract Chlorinated paraffins (CPs), one class of hydrophobic and toxic compounds, are easily adsorbed into sediments and then pose potential risks to the ecosystem and human health. However, few researches on short- and medium-chain CPs (SCCPs and MCCPs) in sediments have been performed. In …

Occurrences, sources and risk assessment of short- and medium-chain chlorinated paraffins in sediments from the middle reaches of the Yellow River, China Read More »

Nontarget approach for environmental monitoring by GC x GC-HRTOFMS in the Tokyo Bay basin

Authors: Yasuyuki Zushi, Shunji Hashimoto, Kiyoshi Tanabe Abstract In this study, we developed an approach for sequential nontarget and target screening for the rapid and efficient analysis of multiple samples as an environmental monitoring using a comprehensive two-dimensional gas chromatograph coupled to a high resolution time-of-flight mass spectrometer (GC × GC-HRTOFMS). A key feature of the approach was the …

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Bifunctional Ni catalysts for the one-pot conversion of Organosolv lignin into cycloalkanes

Authors: Xingyu Wang, Roberto Rinaldi Abstract In this report, Ni/ZrO2, Ni/Al2O3, Ni/Al2O3-KF, Ni/SBA-15, and Ni/Al-SBA-15 were examined as catalysts for the hydrodeoxygenation of diphenyl ether. Adopting the degree of deoxygenation and yield of monocyclic products as the criteria for the catalyst selection, Ni/Al-SBA-15 was identified as the best catalyst for HDO of diphenyl ether. In …

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Exploring the Saccharomyces cerevisiae Volatile Metabolome: Indigenous versus Commercial Strains

Authors: Zélia Alves, André Melo, Ana Raquel Figueiredo, Manuel A. Coimbra, Ana C. Gomes, Sílvia M. Rocha Abstract Winemaking is a highly industrialized process and a number of commercial Saccharomyces cerevisiae strains are used around the world, neglecting the diversity of native yeast strains that are responsible for the production of wines peculiar flavours. The aim of …

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Flavoromics approach in monitoring changes in volatile compounds of virgin rapeseed oil caused by seed roasting

Authors: Anna Gracka, Henryk H. Jeleń, Małgorzata Majcher, Aleksander Siger, Anna Kaczmarek Abstract Two varieties of rapeseed (one high oleic – containing 76% of oleic acid, and the other – containing 62% of oleic acid) were used to produce virgin (pressed) oil. The rapeseeds were roasted at different temperature/time combinations (at 140–180 °C, and for 5–15 min); …

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Lignin hydroconversion on MoS2-based supported catalyst: Comprehensive analysis of products and reaction scheme

B.Joffres, M.T. Nguyen, D. Laurenti, C. Lorentz, V. Souchon, N. Charon, A. Daudin, A. Quignard, C. Geantet Abstract The hydroconversion of a wheat straw soda lignin was studied in a batch reactor, in tetralin solvent, with a NiMoS/Al2O3 catalyst under H2 pressure at 350 °C. Gaseous, solid and liquid products were separated, quantified and detailed analyses were performed …

Lignin hydroconversion on MoS2-based supported catalyst: Comprehensive analysis of products and reaction scheme Read More »

Integrated reduction and acid-catalysed conversion of furfural in alcohol medium using Zr,Al-containing ordered micro/mesoporous silicates

Authors: Margarida M. Antunes, Sérgio Lima, Patrícia Neves, Ana L. Magalhães, Enza Fazio, Fortunato Neri, Manuel T. Pereira, Andreia F. Silva, Carlos M. Silva, Sílvia M. Rocha, Martyn Pillinger, Atsushi Urakawa, Anabela A.Valente Abstract Ordered porous silicates of the type TUD-1 and zeolite beta possessing zirconium and aluminium sites were evaluated as eco-friendly heterogeneous, multifunctional …

Integrated reduction and acid-catalysed conversion of furfural in alcohol medium using Zr,Al-containing ordered micro/mesoporous silicates Read More »

Release of chlorinated, brominated and mixed halogenateddioxin-related compounds to soils from open burning of e-waste inAgbogbloshie (Accra, Ghana)

Authors: Nguyen Minh Tue, Akitoshi Goto, Shin Takahashi, TakaakiItai, Kwadwo Ansong Asante, Tatsuya Kunisue, ShinsukeTanabea Abstract Although complex mixtures of dioxin-related compounds (DRCs) can be released from informal e-waste recycling, DRC contamination in African e-waste recycling sites has not been investigated. This study examined the concentrations of DRCs including chlorinated, brominated, mixed halogenated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs, …

Release of chlorinated, brominated and mixed halogenateddioxin-related compounds to soils from open burning of e-waste inAgbogbloshie (Accra, Ghana) Read More »