A quantitative research of microspheres, poly(ethylene glycol dimethacrylate-co-acrylic acid) (P(EGDMA-co-AA)) and poly(divinvlbenzene-80-co-acrylic acid) (P(DVB-co-AA)), with active carboxyl groups on surface prepared by distillation-precipitation polymerization was presented in this paper. The loading capacity of active carboxyl group on microspheres which was investigated by titration technique would be increased and the contact angle was decreased following the increase of the feed ratio of acrylic acid (AA) monomer. This phenomenon indicated that the hydrophilicity of particles was mainly determined by the feed ration of hydrophilic AA monomer. However, when the AA fraction was at a fixed level, a slight difference of the loading capacity of carboxyl groups on microsphere surfaces with different crosslinkers existed. The microspheres with EGDMA as crosslinker had a higher loading capacity of carboxyl groups and lower contact angle than those of P(DVB-co-AA) microspheres, which indicated that P(EGDMA-co-AA) microspheres were more hydrophilic than P(DVB-co-AA) microspheres.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1166/jnn.2011.4041 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Evaluation of ozonated and ultrasonically treated corn starch as an adsorbent for patulin in buffer solutions.
Sci Rep
January 2025
Department of Food Toxicology and Contaminant, National Research Centre, Dokki, Giza, Egypt.
This study evaluates the potential of ozonated corn starch (OCS) and ultrasonicated ozonated corn starch (USOCS) as adsorbents for patulin removal in buffer solutions. The results indicated that dual modification significantly altered the starch's structure, introducing functional groups such as carbonyl and carboxyl groups, and increasing its surface area. These modifications led to enhanced patulin adsorption capacity.
View Article and Find Full Text PDFZwitterionic Poly(ethylene glycol) Nanoparticles Minimize Protein Adsorption and Immunogenicity for Improved Biological Fate.
ACS Appl Mater Interfaces
January 2025
Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China.
We report the assembly of poly(ethylene glycol) nanoparticles (PEG NPs) and optimize their surface chemistry to minimize the formation of protein coronas and immunogenicity for improved biodistribution. PEG NPs cross-linked with disulfide bonds are synthesized utilizing zeolitic imidazolate framework-8 NPs as the templates, which are subsequently modified with PEG molecules with different end groups (carboxyl, methoxy, or amino) to vary the surface chemistry. Among the modifications, the amino and residual carboxyl groups form a pair of zwitterionic structures on the surface of PEG NPs, which minimize the adsorption of proteins (e.
View Article and Find Full Text PDFSynthesis, Preclinical Evaluation, and First-in-Human Assessment of ICG-PSMA-D5: A PSMA-Targeted Probe for Fluorescence-Guided Surgery of Prostate Cancer.
J Med Chem
January 2025
Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China.
Precise surgical resection of prostate cancer (PCa) is a significant clinical challenge due to the impact of positive surgical margins on postoperative outcomes. Fluorescence-guided surgery (FGS) enables real-time tumor visualization using fluorescent probes. In this study, we synthesized and evaluated an indocyanine green (ICG)-based PSMA-targeted near-infrared probe, , for intraoperative imaging of PCa lesions.
View Article and Find Full Text PDFA C-H Arylation-Based Enantioselective Synthesis of Planar Chiral Cyclophanes.
Angew Chem Int Ed Engl
January 2025
University of Basel, Department of Chemistry, St. Johanns-Ring 19, 4056, Basel, SWITZERLAND.
Despite the growing importance of planar chiral macrocyclophanes owing to their unique properties in different areas of chemistry, methods that are effective in controlling their planar chirality are restricted to certain molecular scaffolds. Herein, we report the first Pd(0)-catalyzed enantioselective intermolecular C-H arylation that induces planar chirality by installing bulky aryl groups through dynamic kinetic resolution (DKR). A computer-assisted approach allowed a fine-tuning of the structure of the employed chiral bifunctional phosphine-carboxylate ligands to achieve high enantioselectivities.
View Article and Find Full Text PDFExploring a metal/base-free porphyrin involving a carboxyl-functionalized pyridine moiety for photocatalytic -arylation of benzamide validated using RSM.
Org Biomol Chem
January 2025
Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu-632014, India.
A porphyrin comprising a carboxyl-functionalized pyridine moiety was synthesized and characterized using H NMR, C NMR, FT-IR, powder-XRD, BET, ICP-MS, SEM and EDAX. The proton level (H = 1.19) and energy band gap (1.
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!