A highly porous and spongy monolith cryogel was prepared by a single freeze-thawing cycle of a PVA solution containing chitin nanofibrils (CNFs) as the nanofiller and glutaraldehyde (GA) as the cross-linker. The presence of CNFs significantly reinforced the spongy structure of the cryogel so that repeated squeezing-releasing did not deteriorate its spongy structure. The in situ self-polymerized polydopamine was formed inside the spongy cryogel by soaking the cryogel in a dopamine solution. The polydopamine modified cryogel (PVA-CNF-D) showed a very good antioxidant activity in that approximately 49% of free radicals of DPPH˙ was consumed within 2 min. Silver nanoparticles (SNPs) could be spontaneously reduced from silver nitrate solution and deposited onto the polydopamine modified surface without an exogenous reducing reagent. The SNP incorporated spongy cryogel demonstrated a very effective antibacterial activity against E. coli.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/c4tb00175c | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effect of Different Cantilever Lengths in Polyether Ether Ketone Prosthetic Framework in All-on-Four Technique on Stress Distribution: A Three-Dimensional (3D) Finite Element Analysis.
Cureus
November 2024
Department of Removable Prosthodontics, Syrian Arab Republic Damascus University Faculty of Dental Medicine, Damascus, SYR.
Background: Determining the distal cantilever length in All-on-Four (All-on-4) implant-supported prostheses is a major factor in the long-term success of these prostheses. The difference in mechanical properties of materials used in the fabrication of these prostheses, such as polyether ether ketone (PEEK), may have an impact on the determination of the cantilever length that best distributes stress.
Aim: To study the distribution of stress in All-on-4 mandibular prostheses in the bone, implants, and framework according to difference cantilever length in PEEK prosthetic framework using three-dimensional finite element analysis.
Spongy-looking microfabrics in the earliest named stromatolite represent deep burial alteration and incipient metamorphism.
Sci Rep
December 2024
Science Group, Natural History Museum, Cromwell Road, London, SW7 5BD, UK.
The earliest named stromatolite Cryptozoon Hall, 1884 (Late Cambrian, ca. 490 Ma, eastern New York State), was recently re-interpreted as an interlayered microbial mat and non-spiculate (keratosan) sponge deposit. This "classic stromatolite" is prominent in a fundamental debate concerning the significance or even existence of non-spiculate sponges in carbonate rocks from the Neoproterozoic (Tonian) onwards.
View Article and Find Full Text PDFEvaluation of the Effect of Chitosan-Based Irrigation Solutions on the Bond Strength of Mineral Trioxide Aggregate to Bulk-Fill Composite.
J Funct Biomater
December 2024
Department of Endodontics, Faculty of Dentistry, Gazi University, 06490 Ankara, Türkiye.
Bond strength between repair and restorative materials is crucial for endodontic success. This study assessed the effects of the following final irrigation solutions on the bond strength of mineral trioxide aggregate (MTA) to a bulk-fill composite: (1) 17% Ethylenediamine tetraacetic acid (EDTA); (2) 2% Chlorhexidine (CHX); (3) 0.2% chitosan; (4) 0.
View Article and Find Full Text PDFMandibular bone defect healing using polylactic acid-nano-hydroxyapatite-gelatin scaffold loaded with hesperidin and dental pulp stem cells in rat.
Tissue Cell
December 2024
Stem Cells Technology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran; Department of Natural Sciences, West Kazakhstan Marat Ospanov Medical University, Aktobe, Kazakhstan. Electronic address:
Addressing mandibular defects poses a significant challenge in maxillofacial surgery. Recent advancements have led to the development of various biomimetic composite scaffolds aimed at facilitating mandibular defect reconstruction. This study aimed to assess the regenerative potential of a novel composite scaffold consisting of polylactic acid (PLA), hydroxyapatite nanoparticles (n-HA), gelatin, hesperidin, and human dental pulp stem cells (DPSCs) in a rat model of mandibular bone defect.
View Article and Find Full Text PDFA comparative study on leaf anatomy and photosynthetic characteristics of different growth stages of .
PeerJ
December 2024
College of Pharmacy, Guilin Medical University, Guilin, Guangxi, China.
The rare and endangered wild plant, , has been listed as a second-level key protected plant in China. Currently, its habitat is severely damaged, and the population has dramatically declined, necessitating urgent intervention for protection. In this study, the aim was to explore the correlations and differences from the perspectives of photosynthetic characteristics and leaf structure, providing scientific references for conservation and cultivation.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!