Physical characterization and molecular structure of hydrophilic polymers obtained by radiation cast-polymerization of methoxypolyethyleneglycole methacrylate monomers for biomedical applications

1983 ◽  
Vol 18 (8) ◽  
pp. 2430-2436 ◽  
Author(s):  
Minoru Kumakura ◽  
Isao Kaetsu
Keyword(s):  
Molecular Structure ◽  
Biomedical Applications ◽  
Hydrophilic Polymers ◽  
Physical Characterization ◽  
Methacrylate Monomers

scholarly journals Influence of Soft Segment Molecular Structure on Physicochemical Properties of Cellulose Nanocrystals based Polyurethane

2021 ◽  
Vol 2076 (1) ◽  
pp. 012027
Author(s):  
Maolan Zhang ◽  
Jiale Wang ◽  
Yan Li ◽  
Xiujuan Lu ◽  
Xiaoling Liao ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Biomedical Applications ◽  
Chemical Structure ◽  
Soft Segment ◽  
Cross Linking ◽  
Performance Requirements ◽  
Ring Structures ◽  
Good Biocompatibility ◽  
External Stimuli ◽  
Thermal Stability Of

Abstract SPUs are commonly used in clinic due to their good biocompatibility and can respond to different external stimuli. Among them, introducing CNCs into PUs to prepare water-driven PUs had attracted increasing attention. Herein, we report two new types of CNCs based PU nanocomposites by chemically cross-linking CNCs and PDLLA soft segment with flexible PEG chain or rigid piperazine ring structures. Specifically, the prepared nanocomposites were characterized by their morphology, chemical structure, thermal property, hydrophilicity as well as crystallinity, and the results showed that regardless of the molecular structure of the PDLLA, chemically cross-linking CNCs and PDLLA could significantly improve their compatibility. In addition, when the soft segment contains hydrophilic flexible sections, ie, PEG 200, the compatibility of CNCs with PU and crystallinity of obtained materials were better, and when the PDLLA contains a rigid cyclic structure, the thermal stability of obtained CNCs based PU would be more excellent. These results suggest that we can design the soft segment molecular structure of CNCs based PU to meet the performance requirements of different biomedical applications.

scholarly journals Flavonoids in Lemon and Grapefruit IntegroPectin

2021 ◽  
Author(s):  
Antonino Scurria ◽  
Marzia Sciortino ◽  
Lorenzo Albanese ◽  
Domenico Nuzzo ◽  
Federica Zabini ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Biomedical Applications ◽  
Hydrodynamic Cavitation ◽  
Citrus Fruits ◽  
Processing Waste ◽  
Rhamnogalacturonan I ◽  
Citrus Flavonoids ◽  
Prevention And Treatment ◽  
Microbial Infections ◽  
Insight Into

Following the analysis of terpenes present in new lemon and grapefruit “IntegroPectin” pectins obtained via the hydrodynamic cavitation of industrial lemon and grapefruit processing waste, the HPLC-MS analysis of the flavonoid compounds reveals the presence of eriocitrin, naringin, hesperidin and kaempferol typical of the respective citrus fruits. The pectic fibers rich in rhamnogalacturonan-I “hairy” regions act as chemical sponges adsorbing and concentrating at their outer surface highly bioactive citrus flavonoids and terpenes. These findings, together with the unique molecular structure of these new whole citrus pectins, provide preliminary insight into the broad-scope and powerful biological activity of these biomaterials. Numerous new biomedical applications beyond prevention and treatment of microbial infections and neurodegenerative disease are anticipated.

scholarly journals Molecular and Physical Characterization of Burkholderia mallei O Antigens

2002 ◽  
Vol 184 (3) ◽  
pp. 849-852 ◽  
Author(s):  
Mary N. Burtnick ◽  
Paul J. Brett ◽  
Donald E. Woods
Keyword(s):  
Molecular Structure ◽  
Monoclonal Antibody ◽  
Gene Cluster ◽  
Polyclonal Antibodies ◽  
Biosynthetic Gene Cluster ◽  
Physical Characterization ◽  
Burkholderia Mallei ◽  
Biosynthetic Gene ◽  
O Antigens

ABSTRACT Burkholderia mallei lipopolysaccharide (LPS) has been previously shown to cross-react with polyclonal antibodies raised against B. pseudomallei LPS; however, we observed that B. mallei LPS does not react with a monoclonal antibody (Pp-PS-W) specific for B. pseudomallei O polysaccharide (O-PS). In this study, we identified the O-PS biosynthetic gene cluster from B. mallei ATCC 23344 and subsequently characterized the molecular structure of the O-PS produced by this organism.

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