Stimuli-responsive pyrimidine ring rotation in copper complexes for switching their physical properties

2013 ◽  
Vol 15 (26) ◽  
pp. 10549 ◽  
Author(s):  
Michihiro Nishikawa ◽  
Shoko Kume ◽  
Hiroshi Nishihara
Keyword(s):  
Physical Properties ◽  
Copper Complexes ◽  
Pyrimidine Ring ◽  
Stimuli Responsive ◽  
Ring Rotation

Steric Interference on the Redox-conjugated Pyrimidine Ring Rotation of Mono- and Dinuclear Copper Complexes with (4-Methyl-2-pyrimidinyl)imine Ligands

2014 ◽  
Vol 43 (7) ◽  
pp. 1037-1039 ◽  
Author(s):  
Yohei Hattori ◽  
Michihiro Nishikawa ◽  
Tetsuro Kusamoto ◽  
Shoko Kume ◽  
Hiroshi Nishihara
Keyword(s):  
Copper Complexes ◽  
Pyrimidine Ring ◽  
Dinuclear Copper ◽  
Ring Rotation ◽  
Imine Ligands

scholarly journals Stimuli-responsive polymers and their applications

2017 ◽  
Vol 8 (1) ◽  
pp. 127-143 ◽  
Author(s):  
Menglian Wei ◽  
Yongfeng Gao ◽  
Xue Li ◽  
Michael J. Serpe
Keyword(s):  
Drug Delivery ◽  
Physical Properties ◽  
Artificial Muscles ◽  
Stimuli Responsive ◽  
Stimuli Responsive Polymers ◽  
Responsive Polymers ◽  
Responsive Polymer ◽  
External Stimuli

Responsive polymer-based materials are capable of altering their chemical and/or physical properties upon exposure to external stimuli. This review highlights their use for sensing and biosensing, drug delivery, and artificial muscles/actuators.

scholarly journals Stimuli-Responsive Polypeptides for Biomedical Applications

Polymers ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 830 ◽  
Author(s):  
DaeYong Lee ◽  
N. Rejinold ◽  
Seong Jeong ◽  
Yeu-Chun Kim
Keyword(s):  
Physical Properties ◽  
Adenosine Triphosphate ◽  
Biomedical Applications ◽  
Stimuli Responsive ◽  
The Past ◽  
Bioactive Properties ◽  
Recent Advances ◽  
Ph Reduction ◽  
Biomedical Fields

Stimuli-responsive polypeptides have gained attention because desirable bioactive properties can be easily imparted to them while keeping their biocompatibility and biodegradability intact. In this review, we summarize the most recent advances in various stimuli-responsive polypeptides (pH, reduction, oxidation, glucose, adenosine triphosphate (ATP), and enzyme) over the past five years. Various synthetic strategies exploited for advanced polypeptide-based materials are introduced, and their applicability in biomedical fields is discussed. The recent polypeptides imparted with new stimuli-responsiveness and their novel chemical and physical properties are explained in this review.

scholarly journals Polyurethane Foams with Pyrimidine Rings

2014 ◽  
Vol 16 (3) ◽  
pp. 1-6 ◽  
Author(s):  
Ewelina Kania ◽  
Jacek Lubczak
Keyword(s):  
Compressive Strength ◽  
Thermal Resistance ◽  
Physical Properties ◽  
Barbituric Acid ◽  
Pyrimidine Ring ◽  
Polyurethane Foams ◽  
Long Time

AbstractOligoetherols based on pyrimidine ring were obtained upon reaction of barbituric acid with glycidol and alkylene carbonates. These oligoetherols were then used to obtain polyurethane foams in the reaction of oligoetherols with isocyanates and water. The protocol of foam synthesis was optimized by the choice of proper kind of oligoetherol and synthetic composition. The thermal resistance was studied by dynamic and static methods with concomitant monitoring of compressive strength. The polyurethane foams have similar physical properties as the classic ones except their enhanced thermal resistance. They stand long-time heating even at 200°C. Moreover thermal exposition of foams results generally in increase of their compressive strength.

scholarly journals Bacterial Succinoglycans: Structure, Physical Properties, and Applications

Polymers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 276
Author(s):  
Jae-pil Jeong ◽  
Yohan Kim ◽  
Yiluo Hu ◽  
Seunho Jung
Keyword(s):  
Drug Delivery ◽  
Physical Properties ◽  
Metal Ion ◽  
Structural Characteristics ◽  
Culture Conditions ◽  
Medium Composition ◽  
Stimuli Responsive ◽  
Food Industries ◽  
Acetyl Group ◽  
Functional Biomaterials

Succinoglycan is a type of bacterial anionic exopolysaccharide produced from Rhizobium, Agrobacterium, and other soil bacteria. The exact structure of succinoglycan depends in part on the type of bacterial strain, and the final production yield also depends on the medium composition, culture conditions, and genotype of each strain. Various bacterial polysaccharides, such as cellulose, xanthan, gellan, and pullulan, that can be mass-produced for biotechnology are being actively studied. However, in the case of succinoglycan, a bacterial polysaccharide, relatively few reports on production strains or chemical and structural characteristics have been published. Physical properties of succinoglycan, a non-Newtonian and shear thinning fluid, have been reported according to the ratio of substituents (pyruvyl, succinyl, acetyl group), molecular weight (Mw), and measurement conditions (concentration, temperature, pH, metal ion, etc.). Due to its unique rheological properties, succinoglycan has been mainly used as a thickener and emulsifier in the cosmetic and food industries. However, in recent reports, succinoglycan and its derivatives have been used as functional biomaterials, e.g., in stimuli-responsive drug delivery systems, therapeutics, and cell culture scaffolds. This suggests a new and expanded application of succinoglycan as promising biomaterials in biomedical fields, such as tissue engineering, regenerative medicine, and pharmaceuticals using drug delivery.

Synthesis of polyetherols with 1,3-pyrimidine ring using 6-aminouracil, ethylene carbonate and propylene oxide

e-Polymers ◽  
2011 ◽  
Vol 11 (1) ◽  
Author(s):  
Elżbieta Chmiel-Szukiewicz
Keyword(s):  
Thermal Stability ◽  
Thermal Resistance ◽  
Physical Properties ◽  
1H Nmr ◽  
Propylene Oxide ◽  
Compression Strength ◽  
Ethylene Carbonate ◽  
Pyrimidine Ring ◽  
Linear Dimensions ◽  
Thermal Stability Of

AbstractNew method of synthesis of polyetherols with 1,3-pyrimidine ring by reactions of 6-aminouracil with ethylene carbonate and propylene oxide was described. The structure of products was analyzed using the IR, 1H-NMR and MALDI-TOF spectroscopies. Some physical properties and thermal stability of polyetherols were investigated. Initial tests on the foaming of polyurethanes obtained from the polyetherols were performed. Some properties of the foams such as apparent density, absorption of water, linear dimensions stability, thermal resistance and compression strength were investigated. Obtained foams show an improved thermal stability.

Atropisomeric Flavoenzyme Models with a Modified Pyrimidine Ring:  Syntheses, Physical Properties, and Stereochemistry in the Reactions with NAD(P)H Analogs

1996 ◽  
Vol 61 (26) ◽  
pp. 9344-9355 ◽  
Author(s):  
Atsuyoshi Ohno ◽  
Jun Kunitomo ◽  
Yasushi Kawai ◽  
Tetsuji Kawamoto ◽  
Masaki Tomishima ◽  
...  
Keyword(s):  
Physical Properties ◽  
Pyrimidine Ring
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