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Composition-dependent MRM transitions and structure-indicative elution segments (CMTSES)-based LC-MS strategy for disaccharide profiling and isomer differentiation.
Anal Chim Acta
February 2025
Faculty of Chinese Medicine & State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Taipa, Macau, China. Electronic address:
Background: Carbohydrates exhibit diverse functions and extensive biological activities and are notable in the field of life sciences. However, their inherent diversity and complexity-steaming from variations in isomeric monomers, glycosidic bonds, configurations, etc.-present considerable challenges in structural analysis.
View Article and Find Full Text PDFComparative Investigation of Untargeted and Targeted Metabolomics in Turmeric Dietary Supplements and Rhizomes.
Foods
December 2024
Methods and Application of Food Composition Laboratory, Beltsville Human Nutrition Research Center, Agricultural Research Service, U.S. Department of Agriculture, Beltsville, MD 20705, USA.
In the present study, we analyzed the bioactive curcuminoids content in eight capsules (DS-1-DS-7 and DS-9), one tablet (DS-8), three ground turmeric samples (DS-10-DS-12), and three ground turmeric rhizomes (TR-1, TR-2, and TR-3). Initial screening with infrared and ultraviolet-visible spectroscopy coupled with a principal component analysis (PCA) revealed distinct differences between the samples analyzed. Hence, targeted and untargeted analyses were performed using ultra-high-performance liquid chromatography and gas chromatography coupled with mass spectrometry detections.
View Article and Find Full Text PDFSingle-isomer bis(pyrrolidino)fullerenes as electron-transporting materials for tin halide perovskite solar cells.
Chem Sci
December 2024
Institute for Chemical Research, Kyoto University Gokasho, Uji Kyoto 611-0011 Japan
Although fullerene bisadducts are promising electron-transporting materials for tin halide perovskite solar cells, they are generally synthesized as a mixture of isomeric products that require a complicated separation process. Here, we introduce a phenylene-bridged bis(pyrrolidino)fullerene, Bis-PC, which forms only a single isomer due to geometrical restriction. When used in a tin perovskite solar cell with a PEAFASnI (PEA: phenylethylammonium and FA: formamidinium) light absorption layer, the resulting open-circuit voltage ( ) was 0.
View Article and Find Full Text PDFVegetable Oils and Their Use for Frying: A Review of Their Compositional Differences and Degradation.
Foods
December 2024
Department of Food Technology, Faculty of Pharmacy, Lascaray Research Center, University of the Basque Country (UPV/EHU), 01006 Vitoria-Gasteiz, Spain.
This review provides an overview of the main vegetable oils of different botanical origin and composition that can be used for frying worldwide (olive and extra-virgin olive oil, high-oleic sunflower oil, rapeseed oil, peanut oil, rice bran oil, sunflower oil, corn oil, soybean oil, cottonseed oil, palm oil, palm kernel oil and coconut oil) and their degradation during this process. It is well known that during this culinary technique, oil's major and minor components degrade throughout different reactions, mainly thermoxidation, polymerization and, to a lesser extent, hydrolysis. If severe high temperatures are employed, isomerization to fatty acyl chains and cyclization are also possible.
View Article and Find Full Text PDFThe effects of industrial processing and home cooking practices on trans-fatty acid profiles of vegetable oils.
Food Chem
December 2024
Department of Food Science, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg C, Denmark.
The intake of trans-fatty acids (TFA) is strongly associated with an increased risk of cardiovascular diseases and elevated low-density lipoprotein cholesterol levels in blood. This review explores the critical factors influencing TFA formation during industrial vegetable oil processing and home cooking practices, particularly deep-frying. While hydrogenation, a major source of TFA, has been largely eliminated in developed countries, it remains unregulated in many developing countries, posing significant health risks.
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