Results 51 to 60 of about 3,686 (163)

Box–Behnken optimization and ANN‐ANFIS integrated modelling for transesterification using thermally activated basic oxygen furnace slag catalyst

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Global energy demand and environmental concerns have intensified the search for renewable and sustainable energy sources. This study thus, focuses on optimizing the transesterification process of waste cooking oil (WCO) using thermally activated basic oxygen furnace slag catalyst calcined at 850°C (BOF 850). The optimization and modelling were
Johra S. Ali, Hillary L. Rutto
wiley   +1 more source

Wheat fertilization affects oviposition preference of wheat midge, Sitodiplosis mosellana (Géhin) (Diptera: Cecidomyiidae)

Pest Management Science, EarlyView.
Wheat fertilization increased plant growth, nitrogen and protein levels, influencing the wheat volatile profile and affecting female wheat midge choice to lay eggs. This could partly result from the observed changes in the VOC profile. Abstract BACKGROUND In Canada, the orange wheat blossom midge (hereafter called wheat midge), Sitodiplosis mosellana ...
Chaminda De Silva Weeraddana, Ramya Wijesundara, Sheri A. Schmidt, A. Paulina de la Mata, Curt McCartney, James J. Harynuk, Alejandro C. Costamagna   +6 more
wiley   +1 more source

In-bottle thin film solid phase microextraction coupled to flow modulated comprehensive two-dimensional gas chromatography–time-of-flight mass spectrometry for monitoring of organic pollutants in environmental waters

Green Analytical Chemistry
The monitoring of organic compounds in water is critical for assessing environmental health and the effectiveness of treatment processes. In this study, we present a robust and eco-friendly approach to environmental water analysis that integrates thin ...
Khaled Murtada, Matthew Edwards, Laura McGregor, Jonathan Grandy, Janusz Pawliszyn   +4 more
doaj   +1 more source

A Perspective of Multi‐Reflecting TOF MS

Mass Spectrometry Reviews, Volume 45, Issue 3, Page 476-506, May/June 2026.
ABSTRACT Time‐of‐flight mass spectrometry (TOF MS) excels in rapid and high‐sensitivity analysis, making it a cornerstone of analytical chemistry. But as sample complexity explodes in omics studies, so does the need for higher resolving power to ensure accurate results.
A. N. Verenchikov, V. V. Makarov, A. V. Vorobyev, S. N. Kirillov   +3 more
wiley   +1 more source

Characterization of the Orphan Cytochrome P450 CYP107J1 From Bacillus subtilis Through Peroxygenase Activity Engineering

Microbial Biotechnology, Volume 19, Issue 5, May 2026.
The orphan cytochrome P450 CYP107J1 with unknown redox partners was rationally modified into H2O2‐driven form. The QE (E251Q/T252E) mutant produced valuable chemicals by simply mixing the enzyme with substrate and H2O2. ABSTRACT Cytochrome P450 monooxygenases (P450s) not only play many physiological roles in oxidative metabolism but are also promising ...
Hideki Kato, Takafumi Hashimoto, Tuhin Das, Daniel Z. Doherty, Stephen G. Bell, Toshiki Furuya   +5 more
wiley   +1 more source

Preparation of Thermodesorption Tube Standards: Comparison of Usual Methods Using Accuracy Profile Evaluation

Separations, 2022
In order to quantify organic impurities in gas produced from renewable sources, thermal desorption coupled with GC-MS or GC×GC-MS is very useful. However, the preparation of the standard tubes appears not to be trivial.
Clément De Saint Jores, Romain Klein, Agathe Legendre, José Dugay, Didier Thiébaut, Jérôme Vial   +5 more
doaj   +1 more source

Method Development for the Analysis of Carbonaceous Chondrites by Laser Desorption/Ionization and Secondary Ion Time‐of‐Flight Mass Spectrometry

Journal of Mass Spectrometry, Volume 61, Issue 4, April 2026.
ABSTRACT This study focuses on the development of a laser desorption/ionization mass spectrometric method for analyzing carbonaceous chondrites, meteorites that may hold clues to the origin of life. Since carbonaceous chondrites are only available in small quantities, we initially designed an artificial meteorite material (the mineral forsterite) doped
Edita Rados, Johannes Frank, Ernst Pittenauer   +2 more
wiley   +1 more source

Measurements of I/SVOCs in biomass-burning smoke using solid-phase extraction disks and two-dimensional gas chromatography [PDF]

, 2018
Biomass-burning organic-aerosol (OA) emissions are known to exhibit semi-volatile behavior that impacts OA loading during plume transport. Because such semi-volatile behavior depends in part on OA composition, improved speciation of intermediate and semi-
Barsanti, KC, Goldstein, AH, Hatch, LE, Jen, CN, Lipton, M, Rivas-Ubach, A   +5 more
core   +1 more source

A new method of peak detection for analysis of comprehensive two-dimensional gas chromatography mass spectrometry data

, 2014
We develop a novel peak detection algorithm for the analysis of comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry (GC$\times$GC-TOF MS) data using normal-exponential-Bernoulli (NEB) and mixture probability models.
Jeong, Jaesik, Kim, Seongho, Ouyang, Ming, Shen, Changyu, Zhang, Xiang   +4 more
core   +1 more source

Characterization of Gardenia tea based on aroma profiles using GC-E-Nose, GC-O-MS and GC × GC-TOFMS combined with chemometrics

Beverage Plant Research
Gardenia tea (GET) is one of the typical representatives of Chinese scented tea and is loved by consumers for its pleasant aroma. In the present study, the volatile profiles of GET were characterized by gas chromatography electronic nose (GC-E-Nose ...
Jialing Xie, Qiwei Wang, Hongchun Cui, Lilei Wang, Yuliang Deng, Haibo Yuan, Jiayi Zhu, Yanqin Yang, Yongwen Jiang   +8 more
doaj   +1 more source