A new HPLC system is described wherein the column is used in the form of a cassette. The system includes a novel, problem-free column connection technique (needle seal). The column is not fitted with the usual single inlet and single outlet, but with a system of four combined inlets/outlets. These features provide on the one hand simple operation (e.g., rapid column exchange--no tools needed) and increased performance (e.g., no loss of separating power in the ancillary equipment), and on the other hand, a high degree of flexibility (e.g., convenient column backflush, improved sample splitting, simple eluate splitting, elegant post-column derivatization, and easy column switching).
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http://dx.doi.org/10.1093/chromsci/17.5.289 | DOI Listing |
Carbohydr Res
January 2025
Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, 81531-990, Curitiba, PR, Brazil. Electronic address:
Sea cucumbers are widely used in oriental cuisine due to their medicinal properties. Antioxidant, antifungal, antiviral, anticancer and neuroprotective activities have already been identified in several species and in different tissues. Among the class of compounds with biological activity are cerebrosides, which have important functions for the proper functioning of cells, especially neuronal cells.
View Article and Find Full Text PDFJ Pharm Biomed Anal
January 2025
Sabanci University Nanotechnology Research and Application Center (SUNUM), Istanbul 34956, Turkey.
This study aimed to determine the chromatographic retention and dissociation/protonation constant (pK) values of lapatinib and tamoxifen, key drugs used in metastatic breast cancer treatment, at 37°C using both conventional and green high-performance liquid chromatography (HPLC) methods. Qualitative analysis was conducted on an XTerra C18 column (250 ×4.6 mm I.
View Article and Find Full Text PDFJ Sep Sci
January 2025
Department of Pharmaceutical Chemistry, Medical University of Gdańsk, Gdańsk, Poland.
Interest in obstructive sleep apnea is rising due to its neurocognitive and cardiovascular impacts, including systemic hypertension, myocardial infarction, and cerebrovascular events. Obstructive sleep apnea diagnosis can be suggested through symptoms like snoring, daytime sleepiness, and physical signs like increased neck circumference; however, overnight polysomnography is recommended to confirm. Exhaled breath condensate has emerged as a novel, noninvasive technique for biomarker sample collection.
View Article and Find Full Text PDFLithium niobate (LiNbO) has shown great potential for applications in nonlinear metasurfaces, thanks to its large second-order nonlinear coefficients and high integration capabilities. Optical resonances play a crucial role in further enhancing the nonlinear optical responses of LiNbO metasurfaces (LNMS). In this study, both numerically and experimentally, we designed and fabricated a metasurface structure that supports toroidal dipole (TD) resonance to enhance second-harmonic generation (SHG).
View Article and Find Full Text PDFA high security physical layer encryption scheme for dual-mode orthogonal frequency division multiplexing with index modulation (DM-OFDM-IM) in magnetic induction communication is proposed. The scheme utilizes DM-OFDM-IM, where subcarriers within each subblock are divided into two groups, each modulated by distinct signal constellations. DM-OFDM-IM leverages the sequential information from the modulated constellation to transmit extra information, leading to a substantial enhancement in spectral efficiency.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!