A simple and sensitive (up to nanogram level) method to determine norepinephrine, serotonin and dopamine in rat brain is described. The amines are acetylated and the derivatives are resolved by thin layer chromatography (TLC) on silica high performance thin layer chromatography (HPLC) plates. Quantification is achieved by fluorescence densitometry at 415 nm excitation wavelength.
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http://dx.doi.org/10.1002/bmc.1130070607 | DOI Listing |
J Mater Chem B
January 2025
Department of Advanced Materials Science & Engineering, Hanseo University, Seosan, Chungnam 31962, Republic of Korea.
MXenes are a class of 2D transition metal carbides and nitrides (MXT) that have attracted significant interest owing to their remarkable potential in various fields. The unique combination of their excellent electromagnetic, optical, mechanical, and physical properties have extended their applications to the biological realm as well. In particular, their ultra-thin layered structure holds specific promise for diverse biomedical applications.
View Article and Find Full Text PDFJ Pharm Anal
January 2025
School of Medicine, Foshan University, Foshan, Guangdong, 528000, China.
Natural antimicrobial peptides (AMPs) are promising candidates for the development of a new generation of antimicrobials to combat antibiotic-resistant pathogens. They have found extensive applications in the fields of medicine, food, and agriculture. However, efficiently screening AMPs from natural sources poses several challenges, including low efficiency and high antibiotic resistance.
View Article and Find Full Text PDFSci Rep
January 2025
School of Advanced Technologies, Iran University of Science and Technology, Tehran, 1684613114, Iran.
This study presents a very thin wideband linear polarization converter in transmission mode with near-unity conversion efficiency. The suggested converter consists of a periodic array on a single-layer substrate, two metallic layers and six vias. Metallic vias connect the upper and lower layers of the construction.
View Article and Find Full Text PDFNat Commun
January 2025
Department of Chemistry, University of California, Berkeley, CA, USA.
The construction of thin film heterostructures has been a widely successful archetype for fabricating materials with emergent physical properties. This strategy is of particular importance for the design of multilayer magnetic architectures in which direct interfacial spin-spin interactions between magnetic phases in dissimilar layers lead to emergent and controllable magnetic behavior. However, crystallographic incommensurability and atomic-scale interfacial disorder can severely limit the types of materials amenable to this strategy, as well as the performance of these systems.
View Article and Find Full Text PDFMethods Mol Biol
January 2025
Department of Biomedical and Pharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul, Republic of Korea.
Known for their diverse and potent physiological activities, natural products continue to be essential for the discovery and development of new drugs. This chapter explores the pivotal role of preparative thin-layer chromatography (Prep-TLC) in the isolation of natural products. This chapter begins with an understanding of the historical significance and structural complexity of natural products, and discusses the problems caused by complex mixtures present in extracts, as well as the multifunctionality, cost-effectiveness, and compatibility with different sample types of Prep-TLC to address these challenges.
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