Tetrapyrrolic Macrocycles with Magnesium, Alluminum, and Zinc in Hydrogen Peroxide Decomposition

Неврова, О. В.; Лобанов, А. В.; Komissarov, G. G.

doi:10.1201/b13964-17

Cited by 5 publications

(7 citation statements)

References 1 publication

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“…Figure 3 shows that the heating of the polymer com posites at 40°С in water for 3.5 h does not significantly reduce the molecular mobility of the probe in the mix ture and does not alter the crystallinity of PHBHV, as demonstrated using DSC. Indeed, at this temperature, changes in the degree of crystallinity of PHB and PHBHV begin to manifest themselves only after a suf ficiently long hydrothermal treatment, more specifi cally, after several weeks of testing in phosphate buffer at 37°С [4,5].…”

Section: Curve 4)mentioning

confidence: 98%

“…In [2,3], the physic ochemical and transport properties of biodegradable thermoplastic matrices prepared from poly(3 hydrox ybutyrate) intended for targeted delivery of drugs were studied. The hydrolytic degradation of PHBHV for a long period (~3 months) was examined in [4,5]. Seg mented polyester urethane (SPEU) is also widely used as a biomedical material for artificial heart compo nents, artificial blood vessels, catheters, and matrices for drug delivery.…”

Section: Introductionmentioning

confidence: 99%

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Effect of external influences on the structural and dynamic parameters of polyhydroxybutyrate-hydroxyvalerate-based biocomposites

Карпова

Иорданский

Попов

et al. 2012

Russ. J. Phys. Chem. B

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The EPR probe, DSC, and WARDX methods are applied to study the molecular dynamics and structure of 3 hydroxybutyrate-3 hydroxyvalerate copolymer (PHBHV, 5 mol %) and its mixtures with seg mented polyester urethane (SPEU) upon ozone oxidation and hydrothermal treatment. It is shown that time limited (3 and 5 h) treatment of the mixed compositions with water at 40°C has no noticeable effect on the dynamics of rotation of the probe (EPR) and the crystallinity of PHBHV (DSC). However, hydrothermal treatment at 70°C causes an increase in the molecular mobility of the probe in the system, accompanied, according to XRD and DSC analyses, by increases in the degree of crystallinity and density of PHBHV crys tallites. The temperature of fusion of mixed compositions also increases. During ozonation, the mobility of the probe slows gradually in PHBHV all the time, whereas in mixed compositions, a slowdown is observed only up to 3 h of oxidation time, after which, up to 5 h of ozonation, the mobility increases, along with decreases in the fraction of the amorphous phase and in the density of the crystallites.

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Section: Curve 4)mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Effect of external influences on the structural and dynamic parameters of polyhydroxybutyrate-hydroxyvalerate-based biocomposites

Карпова

Иорданский

Попов

et al. 2012

Russ. J. Phys. Chem. B

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“…Among polymers, polyoxyalcanoates (POA) occupy a special place, and poly (3 hydroxybutirate) (PHB) is the most widely used polymer [5,6]. This polymer, which is synthesized via the biotechnological method, exhibits such promising properties as high level of biocompatibility [7][8][9] and biodecomposition ability in living tissues without the formation of toxic products [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Structure and properties of ultrathin poly-(3-hydroxybutirate) fibers modified by silicon and titanium dioxide particles

et al. 2015

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The influence of small concentrations of nanoscale silicon and titanium dioxide particles on the structure, physicomechanical and sorption properties, thermal destruction resistance, and thermal and photo oxidant destruction of unwoven ultrathin fibrous materials that are prepared via electrostatic solution spin ning is studied. It is established that nanoscale particles favor the formation of thinner fibers with improved physical and mechanical parameters; good resistance to thermal, thermo and photo oxidant destruction; and positive dynamics of mesenchymal stem cells.

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“…, антитромбогенных [15][16][17], антибактериальных [18], противоопухолевых [19][20][21] и других групп [1,2].…”

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Biocompatibility of electrospun poly(3-hydroxybutyrate) and its composites scaffoldsfor tissue engineering

et al. 2014

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Development of biodegradable polymers-based scaffolds for tissue engineering is a promising trend in bioengineering. The electrospun scaffolds from poly(3-hydroxybutyrate) (PHB) were produced using different additives that changed the physical and chemical characteristics of the products. As a result, the construct consisting of interwoven threads of different diameter (0.8-3.4 mm) were obtained, the smallest diameter was observed in the threads from the PHB using tetrabutilammonium iodide (TBAI) and titanium oxide II (TiO2) as additives. Mesenchymal stem cells (MSC) were cultivated on the scaffolds for the biocompatibility evaluation of obtained materials. Cells viability was determined by the XTT assay test. It was shown that the scaffold from the interwoven threads of lowest diameter is most favorable for MSC growth in comparison with the polymer film and scaffolds from the threads of larger diameter. Thus, it was shown that the biocompatibility of electrospun PHB scaffolds depended on their microstructure. The obtained data can be used for development of scaffolds for tissue engineering.

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Tetrapyrrolic Macrocycles with Magnesium, Alluminum, and Zinc in Hydrogen Peroxide Decomposition

Cited by 5 publications

References 1 publication

Effect of external influences on the structural and dynamic parameters of polyhydroxybutyrate-hydroxyvalerate-based biocomposites

Effect of external influences on the structural and dynamic parameters of polyhydroxybutyrate-hydroxyvalerate-based biocomposites

Structure and properties of ultrathin poly-(3-hydroxybutirate) fibers modified by silicon and titanium dioxide particles

Biocompatibility of electrospun poly(3-hydroxybutyrate) and its composites scaffoldsfor tissue engineering

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