The synthesis process or composition of mesoporous silica nanoparticles (MSNs) affects the physicochemical properties. Using these properties, MSNs were synthesized through the Box-Behnken design (BBD) among statistical experimental methods. The effect of the amounts of synthetic reagents, hexadecyl triethyl ammonium bromide (CTAB), tetraethyl orthosilicate (TEOS), and 2 N sodium hydroxide (NaOH), was studied using the reaction surface design. Surface area, particle size, and zeta potential were set as response values. The physicochemical properties of the optimized MSNs were evaluated, and the effect as a drug delivery system was evaluated by loading doxorubicin hydrochloride (DOX). Nano-sized MSNs were successfully prepared with 0.617 g of CTAB, 8.417 mL of TEOS, and 2.726 mL of 2 N NaOH and showed excellent physicochemical properties. The optimized MSNs showed negligible toxicity in MCF-7 cells. The drug release profile from DOX-loaded MSNs (MSN@DOX) showed an increased rate of release with decreasing pH of the medium, with the release profile sustained for 48 h. In the cytotoxicity test, the sustained drug release mechanism of MSN@DOX was confirmed. This study proposed a new statistical approach to the synthesis of MSNs.
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http://dx.doi.org/10.3390/pharmaceutics13020184 | DOI Listing |
Microb Cell Fact
January 2025
Chemistry of Natural and Microbial Products Department, National Research Centre, El Buhouth St., Dokki, Giza, 12311, Egypt.
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View Article and Find Full Text PDFAnal Chim Acta
February 2025
Department of Microbiology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan, 410208, People's Republic of China. Electronic address:
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View Article and Find Full Text PDFJ Biotechnol
January 2025
Key Laboratory of Green Manufacturing and Biosynthesis of Food Bioactive Substances, China General Chamber of Commerce, School of Food and Health, Beijing Technology and Business University, Beijing, 100048 China.
Melanin with antioxidant and antibacterial properties can be used in food, cosmetics, biotechnology, and other fields, but its insolubility become a main challenge hindering for its application. In this study, water-soluble melanin produced by the novel species Streptomyces vilmorinianum YP1 was characterized using scanning electron microscopy (SEM), UVvisible spectroscopy (with an absorption peak at 220nm), and Fourier transform infrared (FTIR) spectroscopy. The glycosyltransferase gene ORF14 was knocked out, which improved the production of water-soluble melanin by inhibiting competitive pathway.
View Article and Find Full Text PDFWater Res
January 2025
Key Laboratory of Groundwater Quality and Health (China University of Geosciences), Ministry of Education, Wuhan 430078, China; State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution, School of Environmental Studies, Wuhan 430078, China.
The contamination of groundwater with geogenic ammonium (NH) across various geological backgrounds has garnered significant attention, particularly in coastal aquifer systems. However, there remains a gap in our understanding of the mechanisms governing the spatial variability of NH in coastal groundwater at a macroscopic scale. In this study, we collected the sediment samples from two boreholes corresponding to high-NH-N and low-NH-N groundwater.
View Article and Find Full Text PDFJ Chromatogr A
January 2025
Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608 Taiwan.
Despite having identical physicochemical properties, chiral molecules require effective separation techniques due to their distinct pharmacological effects. Polysaccharide-based chiral stationary phases (CSPs) are widely used for chiral separations in liquid chromatography; however, the mechanisms of chiral recognition are not well understood. This research explored the adsorption, retention, and chiral recognition mechanisms of three amylose-based CSPs: Chiralpak ID, IF, and IG.
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