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Functionalized covalent organic frameworks for catalytic conversion of biomass-derived xylan to furfural.
Int J Biol Macromol
January 2025
Key Laboratory of Pulp & Paper Science and Technology of Education Ministry/State Key Laboratory of Biobased Materials and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China. Electronic address:
A direct synthesis strategy was employed to prepare functionalized COFs enriched with acidic sites, using various precursor monomers. The functionalized COFs were applied in the catalytic conversion of biomass-derived xylan to furfural in the liquid phase. The study further assessed the recyclability and reusability of these COFs, explored the relationship between their structural features and catalytic performance, and investigated the reaction mechanism underlying the COF-catalyzed conversion of xylan to furfural.
View Article and Find Full Text PDFComparative study of pulpal response following direct pulp capping using synthesized fluorapatite and hydroxyapatite nanoparticles.
BMC Oral Health
January 2025
Basic Dental Sciences Department, Faculty of Dentistry, Zarqa University, PO Box 2000, Zarqa, 13110, Jordan.
Objective: This study aimed to investigate and compare the histological response of rabbit dental pulp after direct pulp capping with 3 different materials: mineral trioxide aggregate (MTA), nanoparticles of fluorapatite (Nano-FA), and nanoparticles of hydroxyapatite (Nano-HA) after 4 and 6-week time intervals.
Material And Methods: A total of 72 upper and lower incisor teeth from 18 rabbits were randomly categorized into 3 groups)24 incisors from six rabbits each. MTA Group: teeth were capped with MTA.
Histological and radiographic assessment of the regenerative potential of sodium hexametaphosphate (SHMP) as a novel direct pulp capping material in an animal model.
BMC Oral Health
January 2025
Paediatric and Community Dentistry, Faculty of Dentistry, Minia University, Ard Shalaby, El Minia, 61519, Egypt.
Background: This study aimed to assess the histological and radiographic effects of sodium hexametaphosphate (SHMP) as a direct pulp capping (DPC) agent in immature permanent dog premolars.
Methods: A split-mouth design was employed with three healthy 4-month-old Mongrel dogs, each having 36 premolars. The premolars were randomly assigned to either SHMP or MTA.
Crown ether is widely used in water purification because of its ring structure and good selective adsorption of specific heavy metals. However, its high cost and difficulty in recycling limit the purification of heavy metals in water. The anisotropic [2,4]-dibenzo-18-crown-6-modified bamboo pulp aerogel (DB18C6/PA) is successfully synthesized by microwave irradiation and directional freezing technology.
View Article and Find Full Text PDFArticle Synopsis
- Heavy metal wastewater is highly toxic even at low levels, posing risks to the environment and human health, necessitating the development of effective treatment methods.
- MnFeO-loaded bamboo pulp carbon-based aerogel (MCA) is created through freeze-drying and carbonization, and its properties are analyzed using various scientific techniques.
- MCA shows strong adsorption capabilities for heavy metals Pb, Cu, and Cd, with maximum capacities of 74.38, 84.21, and 73.63 mg/g, indicating its potential for use in wastewater purification.
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