We have previously demonstrated that keratocytes penetrate and deposit collagen after a porous web is inserted into interlamellar corneal pockets. In these studies our goal was to determine whether pretreatment of the porous discs would enhance wound healing. We have evaluated four methods of pretreating the porous disc prior to its placement in the stroma. The pretreated discs were followed in vivo for a period of 42 days. The criteria we used to determine whether pretreatment affected wound healing were: collagen deposition, extent of fibroplasia, the synthetic rate of keratocytes within the disc, and lack of edema. Our results indicate that preseeding with stromal keratocytes enhanced the overall synthetic rate and specifically enhanced the amount of collage deposited within the web.
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http://dx.doi.org/10.1002/jbm.820280209 | DOI Listing |
Food Chem
January 2025
Institute of Quality Standards and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing, 100081, China. Electronic address:
The high specific surface area of metal-organic framework (MOF) materials endows them with efficient adsorption capabilities, thereby facilitating sample purification. In this study, a novel aluminum-based MOF (Al-MOF) was synthesized and employed as a solid-phase extraction (SPE) adsorbent for the purification of aflatoxins B (AFB), AFB, AFG, and AFG in vegetable oils. It was revealed that Al-MOF adsorbs aflatoxins through hydrogen bonding and π-π interactions.
View Article and Find Full Text PDFSe Pu
February 2025
College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing 102249, China.
Trace contaminants are toxic and their widespread presence in the environment potentially threatens human health. The levels of these pollutants are often difficult to determine directly using instruments owing to the complexities of environment matrices. Hence, pretreatment steps, such as sample purification and concentration, are key along with various processes that enhance the accuracy and sensitivity of the detection method.
View Article and Find Full Text PDFAnal Chim Acta
February 2025
Food Laboratory of Zhongyuan, Luohe, 462000, Henan Province, PR China.
Background: Edible oils are susceptible to contamination with polycyclic aromatic hydrocarbons (PAHs) throughout production, storage, and transportation processes due to their lipophilic nature. The necessity of quantifying PAHs present in complex oil matrices at trace levels, which bind strongly to impurities in oil matrices, poses a major challenge to the accurate quantification of these contaminants. Therefore, the development of straightforward and effective methods for the separation and enrichment of PAHs in oil samples prior to instrumental analysis is paramount to guaranteeing food safety.
View Article and Find Full Text PDFInt J Biol Macromol
January 2025
School of Material Science and Engineering, University of Jinan, Jinan 250022, PR China. Electronic address:
Some biomasses like cotton contain natural fibrous structures. This is a desirable structural feature for exposure of adsorption sites on cotton-derived activated carbon (AC). This was verified herein by conducting activation of cotton with ZnCl, HPO, KCO or KOH, probing whether structural transformation during activation could be confined inside a cotton fiber.
View Article and Find Full Text PDFAnal Chem
January 2025
Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita 565-0871, Japan.
Prior to mass spectrometry (MS) analysis, pretreatment of low-abundance glycopeptides is vital for identifying protein glycosylation. In this study, we fabricated an environmentally friendly citric-acid-modified cellulose monolith (CCM) characterized by a coral-like porous structure and high-density hydrophilic groups using a thermally induced phase separation (TIPS) method. The CCM production leverages biomass resources, specifically cellulose and citric acid, utilizing TIPS to synthesize continuous porous materials through a straightforward heating and cooling process of polymer solutions.
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