Results 31 to 40 of about 61,447 (248)

Determination of the chemical composition of tea by chromatographic methods: a review [PDF]

, 2015
Despite the fact that mankind has been drinking tea for more than 5000 years, its chemical composition has been studied only in recent decades. These studies are primarily carried out using chromatographic methods.
Combet, Emilie, Nemzer, Boris V., Yashin, Alexandr Ya, Yashin, Yakov I.   +3 more
core   +1 more source

Applications of spatially resolved omics in the field of endocrine tumors

Frontiers in Endocrinology, 2023
Endocrine tumors derive from endocrine cells with high heterogeneity in function, structure and embryology, and are characteristic of a marked diversity and tissue heterogeneity.
Yinuo Hou, Yan Gao, Shudi Guo, Zhibin Zhang, Ruibing Chen, Xiangyang Zhang   +5 more
doaj   +1 more source

Impact of sol mixture composition on organosilica coatings formation on glass substrates

Хімія, фізика та технологія поверхні
In this study, hybrid organosilica coatings on glass substrates were synthesized using mixtures of the active polymer OH-terminated PDMS and one or more precursors, namely methyltrimethoxysilane bis(3-trimethoxysilylpropyl) amine, phenyltrimethoxysilane,
A. O. Mosendz, M. F. Zui
doaj   +1 more source

Hollow-Fiber Liquid-Phase Microextraction (HF-LPME) Coupled On-Line to Liquid Chromatography for the Determination of the Herbicides 2,4-Dichlorophenoxyacetic Acid and 2-Methyl-4-chlorophenoxyacetic Acid and Their Main Metabolites in Soil Samples

Separations, 2023
The use of hollow-fiber liquid-phase microextraction (HF-LPME) is very promising for the clean-up, enrichment, and analysis of chlorophenoxyacetic acid herbicides and their metabolites from environmental and biological samples.
Sònia Moret, Manuela Hidalgo, Juan M. Sanchez   +2 more
doaj   +1 more source

Urinary naphthalene and phenanthrene as biomarkers of occupational exposure to polycyclic aromatic hydrocarbons. [PDF]

, 2008
OBJECTIVES: The study investigated the utility of unmetabolised naphthalene (Nap) and phenanthrene (Phe) in urine as surrogates for exposures to mixtures of polycyclic aromatic hydrocarbons (PAHs).
Garshick, E, Hart, J. E., Herrick, R. F., Laden, F., McClean, M. D., Rappaport, S. M., Smith, T. J., Sobus, J. R., Waidyanatha, S., Zheng, Y.   +9 more
core   +3 more sources

Applications of Microextraction Technology for the Analysis of Alcoholic Beverages Quality: Current Perspectives and Future Directions

Foods
Alcoholic beverages are loved by the majority of consumers because of their diverse characteristics and rich nutritional value; thus, ensuring their quality is necessary for maintaining the rapid development of the alcoholic beverage industry.
Yue Qiu, Qi Deng, Yongqing Zhang, Baoguo Sun, Wenxian Li, Wei Dong, Xiaotao Sun   +6 more
doaj   +1 more source

Lacmellea oblongata and Other Undervalued Amazonian Fruits as Functional, Antioxidant, and Antimicrobial Matrices

Antioxidants
The Amazon represents a key source of food biodiversity and is home to native fruits with high nutritional and functional potential, many of which remain largely unstudied.
Elena Coyago-Cruz, Gabriela Méndez, Ruth Escobar-Quiñonez, Marco Cerna, Jorge Heredia-Moya   +4 more
doaj   +1 more source

An easily prepared graphene oxide-ionic liquid hybrid nanomaterial for micro-solid phase extraction and preconcentration of Hg in water samples [PDF]

, 2018
A preconcentration method based on the use of graphene oxide (GO) functionalized with an ionic liquid (IL) was developed for trace Hg determination in water samples.
Cruz Sotolongo, Annaly, Martinis, Estefanía Mabel, Wuilloud, Rodolfo German   +2 more
core   +1 more source

Gas-Diffusion Microextraction (GDME) Combined with Derivatization for Assessing Beer Staling Aldehydes: Validation and Application

Foods, 2021
In this work, a gas-diffusion microextraction (GDME) methodology was optimized and validated for the analysis of selected staling aldehydes (furfural (FURF), 2-methylpropanal (2-MP), 2-methylbutanal (2-MB), 3-methylbutanal (3-MB), and acetaldehyde (ACET))
Inês M. Ferreira, Daniel O. Carvalho, Marco Gomes da Silva, Luís Ferreira Guido   +3 more
doaj   +1 more source

Therapeutic Drug Monitoring and Methods of Quantitation for Carbamazepine [PDF]

, 2017
Carbamazepine is an early anticonvulsant still used today in the treatment of several forms of epilepsy. An active metabolite in the human body contributes to its pharmacological effect.
Ana Vlasceanu, Cristian Balalau, Cristian Tuchila, Cristina Pirvu, Daniela Baconi, Denisa Balalau, Miriana Stan, null null   +7 more
core   +4 more sources