Results 21 to 30 of about 2,307 (215)

New tool for Gram-negative and Gram-positive bacterial strains differentiation through GC-MS direct identification of exogenous VOC metabolites in headspace vials

Romanian Journal of Ecology & Environmental Chemistry, 2022
In this paper, a chromatographic method for the determination of volatile organic compounds (VOCs) as a tool for Gram-positive and Gram-negative bacterial strains identification was described.
Florentina Laura Chiriac, Andreea Valentina Petre, Catalina Stoica, Iuliana Paun, Florinela Pirvu, Ionut Cristea, Nicoleta Vasilache, Marcela Niculescu, Gabriel Serban, Vasile Ion Iancu   +9 more
doaj   +1 more source

Variation in Gas and Volatile Compound Emissions from Human Urine as It Ages, Measured by an Electronic Nose

Biosensors, 2016
The medical profession is becoming ever more interested in the use of gas-phase biomarkers for disease identification and monitoring. This is due in part to its rapid analysis time and low test cost, which makes it attractive for many different clinical ...
Siavash Esfahani, Nidhi M. Sagar, Ioannis Kyrou, Ella Mozdiak, Nicola O’Connell, Chuka Nwokolo, Karna D. Bardhan, Ramesh P. Arasaradnam, James A. Covington   +8 more
doaj   +1 more source

Streptopyridines, volatile pyridine alkaloids produced by Streptomyces sp. FORM5

Beilstein Journal of Organic Chemistry, 2014
Streptomyces sp. FORM5 is a bacterium that is known to produce the antibiotic streptazolin and related compounds. We investigated the strain for the production of volatiles using the CLSA (closed-loop stripping analysis) method.
Ulrike Groenhagen, Michael Maczka, Jeroen S. Dickschat, Stefan Schulz   +3 more
doaj   +1 more source

Monitoring In Vitro and In Vivo Aroma Release of Espresso Coffees with Proton-Transfer-Reaction Time-of-Flight Mass Spectrometry

Applied Sciences, 2022
This work presents in vitro and in vivo aroma release analysis of three espresso coffees carried out by PTR-ToF-MS headspace and nosespace analysis, respectively. The products were C.
Andrea Romano, Luca Cappellin, Sara Bogialli, Paolo Pastore, Luciano Navarini, Franco Biasioli   +5 more
doaj   +1 more source

Application of sHS/GC-MS method for the identification of paracetamol impurities in the selected pharmaceutical formulations

Current Issues in Pharmacy and Medical Sciences, 2012
Simple and rapid quantitative procedure based on gas chromatography mass spectrometry in combination with static headspace was developed for the identification of paracetamol and its impurities in commercially available analgesic tablets.
Rafał Pietraś, Agnieszka Staszewska, Anna Gumieniczek, Dorota Kowalczuk   +3 more
doaj   +1 more source

Improved sample storage, preparation and extraction of blueberry aroma volatile organic compounds for gas chromatography

Journal of Chromatography Open, 2023
Aroma profiles of blueberries contain a heterogeneous mixture of volatile organic compounds (VOCs), and headspace sampling is the most efficient approach to VOC extraction from berries.
Ryan P. Dias, Trevor A. Johnson, L.Felipe V. Ferrão, Patricio R. Munoz, A. Paulina de la Mata, James J. Harynuk   +5 more
doaj   +1 more source

A Comprehensive Antioxidant and Nutritional Profiling of Brassicaceae Microgreens

Antioxidants
Microgreens are gaining prominence as nutrient-dense foods with health-promoting activities while aligning with smart agriculture and functional food trends.
Anja Vučetić, Olja Šovljanski, Lato Pezo, Nevenka Gligorijević, Saša Kostić, Jelena Vulić, Jasna Čanadanović-Brunet   +6 more
doaj   +1 more source

Electrostatic‐Attraction‐Driven Self‐Assembled Graphene‐Disordered Rocksalt Composite Cathode for Lithium‐Ion Batteries

Advanced Functional Materials, EarlyView.
A non‐aqueous, solution‐based graphene‐wrapping strategy is shown to stabilize disordered rocksalt LMTOF cathodes without structural degradation. The graphene‐wrapped cathode suppresses oxygen loss and parasitic interfacial reactions, lowers impedance growth, and delivers improved cycling stability and rate capability compared with conventional ball ...
Venkata Sai Avvaru, Mateusz Zuba, Beth L. Armstrong, Shilong Wang, Minh X. Tran, Bernardine L. D. Rinkel, Finn Babbe, Harshita Lohani, Yanbao Fu, Isik Su Buyuker, Vincent Battaglia, Ozgenur Kahvecioglu, Robert Kostecki, Bryan D. McCloskey, Haegyeom Kim   +14 more
wiley   +1 more source

Lead Halide Perovskite Photoelectrocatalysis

Advanced Materials, EarlyView.
Lead halide perovskite semiconductors have emerged as highly promising materials for solar fuel and chemical synthesis. This perspective discusses advances made in the rational photoelectrode design to improve solar‐to‐chemical conversion, product scope, and scalability.
Virgil Andrei
wiley   +1 more source

Enhanced Photocatalytic H2O2 Production on Terpyridine‐Based Acrylonitrile‐Linked Covalent Organic Frameworks with Asymmetric Localized Electron Distribution

Advanced Materials, EarlyView.
Asymmetric localized electron distribution has been optimized in covalent organic frameworks to enhance *O2 adsorption and facilitate charge transfer, boosting photocatalytic two‐electron transfer oxygen reduction toward H2O2 production from water and air.
Qinglan Zhao, Mengmeng Ce, Hengtao Lei, Tianyun Jin, Zhipeng Xie, Yushen Liu, Shengyi Yang, Xinwen Ou, Mohammad Farhadpour, Song‐Zhu Kure‐Chu, Xuan‐He Liu, Liang Zhang, Jimmy C. Yu   +12 more
wiley   +1 more source