Results 21 to 30 of about 33,609 (216)

Development and validation of a GC-ECD method for pesticide residue detection in flour [PDF]

Makedonsko Farmacevtski Bilten
This study aimed to optimize and validate a rapid, reliable and accurate method for quantitative determination of pesticide residues in flour matrix.
Margarita Timofejeva, Anita Najdenkoska, Biljana Bauer   +2 more
doaj   +1 more source

Electroanalytical determination of metronidazole in tablet dosage form [PDF]

Journal of the Serbian Chemical Society, 2013
In this study, the electrochemical reduction and determination of metronidazole were easily realized in Britton-Robinson buffer (pH = 4.01) using UTGE by cyclic voltammetric (CV) and differential pulse voltammetric (DPV) techniques.
Yilmaz Selehattin, Baltaoglu Esra, Saglikoglu Gulsen, Yagmur Sultan, Polat Kamran, Sadikoglu Murat   +5 more
doaj   +1 more source

Detection and Quantification Limits for Polyethylene Particles Combining the Thermal Rock-Eval^® Method with a Mathematical Extrapolation Procedure

Microplastics
The main aim of this work is to define the limits of detection (LOD) and quantification (LOQ) for polyethylene (PE) particles using a pyrolysis and oxidation-based method, the thermal Rock-Eval® device, combined with a mathematical extrapolation ...
Maria-Fernanda Romero-Sarmiento, Daniela Bauer, Sébastien Rohais   +2 more
doaj   +1 more source

LC-MS analysis of phenolic compounds and oleraceins in aerial parts of Portulaca oleracea L.

Journal of Applied Botany and Food Quality, 2019
Portulaca oleracea L. (purslane) is a well-known edible and ethnomedicinal plant and it has been called “vegetable for long life” in the Chinese herbal medicine.
Yulian T Voynikov, Reneta Gevrenova, Vessela Balabanova, Irini Doytchinova, Paraskev Nedialkov, Dimitrina Zheleva-Dimitrova   +5 more
doaj   +1 more source

Detection and quantification of beef and pork materials in meat products by duplex droplet digital PCR.

PLoS ONE, 2017
Meat products often consist of meat from multiple animal species, and inaccurate food product adulteration and mislabeling can negatively affect consumers.
Yicun Cai, Yuping He, Rong Lv, Hongchao Chen, Qiang Wang, Liangwen Pan   +5 more
doaj   +1 more source

In Vivo Monitoring of Thrombo‐Inflammatory Biomarkers via Molecularly Imprinted Polymer‐Integrated Hydrogel Microneedles

Advanced Materials, EarlyView.
A wearable electrochemical microneedle patch integrates Prussian Blue redox transduction with molecularly imprinted polymer recognition for reagent‐free sampling and detection of thrombo‐inflammatory biomarkers in dermal interstitial fluid. The platform tracks thrombin and inflammatory cytokines with sensitive in vitro, ex vivo, and in vivo performance,
Mahmoud Ayman Saleh, Peyman GhavamiNejad, Arash Khorrami Jahromi, Sanjana Srikant, Sripadh Guptha Yedire, Fatemeh Keyvani, Roozbeh Siavash Moakhar, Sajad Shiekh, Mackenzie Graham, Joe Quadrilatero, Mahla Poudineh, Sara Mahshid   +11 more
wiley   +1 more source

Spatially Configurable Conformal Sensor Integration on an Ultra‐Fine Metallic Needle for Minimally Invasive Deep‐Tissue Oxygen Monitoring

Advanced Materials Technologies, EarlyView.
A multi‐point oxygen‐sensing ultra‐fine needle (MO‐UFN) is developed by conformally integrating a lithographically patterned flexible electrochemical sensor array onto a clinical acupuncture needle. The platform preserves an approximately 0.3 mm diameter while enabling spatially resolved oxygen profiling along the insertion pathway.
Yeju Seo, Jaeho Park, Yongrok Jeong, Ji‐Hwan Ha, Junseong Ahn, Jimin Gu, Su A Park, Ilwoo Jun, Kichul Lee, Inkyu Park   +9 more
wiley   +1 more source

MetaboSense: An Integrated Quantum Dot‐Mediated Aptamer Assay and Modular Microfluidic Platform for Continuous In‐Line Monitoring of Lung Metabolism During Ex Vivo Perfusion

Advanced Science, EarlyView.
MetaboSense is a first‐of‐its‐kind microfluidic platform enabling continuous, in‐line monitoring of glucose and lactate during ex vivo lung perfusion. Combining a quantum dot–mediated aptamer assay with mixing, depletion, and optofluidic detection modules, it achieves 60–s temporal resolution and shows strong agreement with standard blood gas analyzers,
Sanjana Srikant, Pouyan Keshavarz Motamed, Thomas Borrillo, Lielle Ronen, Gabriel Siebiger, Guillermo Garza, Hesam Abouali, Md Fahim Al Fattah, Ines Jaber, Dayan Ban, Marcelo Cypel, Mingyao Liu, Shaf Keshavjee, Andrew T. Sage, Mahla Poudineh   +14 more
wiley   +1 more source

Determination of thiourea in wheat flour and flour treatment agents by pass-through solid phase extraction purification and high performance liquid chromatography

Zhongguo shipin weisheng zazhi, 2022
ObjectiveTo establish a detection method for thiourea in wheat flour and flour treatment agents（FTA） by pass-through solid phase extraction purification and high performance liquid chromatography.MethodsThe samples were extracted by acetonitrile aqueous ...
DING Yi, XUE Xia, LU Lanxiang, WEI Lili, CUI Yuhua, CHENG Zhi, CAI Ruiqi, WANG Jun, HU Mei, LIU Yanming   +9 more
doaj   +1 more source

Bioinspired Porphyrin‐Based Catalysts From Temporospatial Confined Frameworks for Ultrafast Removal of Sulfaclozine

Advanced Science, EarlyView.
We report the rational design of artificial photocatalysts with asymmetrically coordinated dual‐metal centers and a tailored microenvironment, broadly applicable strategy is established for the synthesis of multivariate zirconium‐based metal–organic frameworks, offering a platform for precisely tuning active‐site configurations to optimize ...
Yuxin Lu, Yu‐Hang Li, Zhiyi Sun, Fanke Tong, Zelin Li, Sheng Wang, Shangkun Pei, Yi Li, Xiyan Xu, Chong‐Chen Wang, Bo Wang, Xiang Li   +11 more
wiley   +1 more source