scholarly journals Composition, Structure, and Formation of Biofilms Constituted by Periodontopathogenic Microorganisms

2020 ◽  
Author(s):  
Juliana Cabrini Carmello ◽  
Sarah Raquel de Annunzio ◽  
Carla Raquel Fontana
Keyword(s):  
Composition Structure

SHS in the Si–CO2 System: Composition/Structure of Combustion Products

2020 ◽  
Vol 29 (3) ◽  
pp. 138-142
Author(s):  
T. V. Barinova ◽  
V. Yu. Barinov ◽  
V. N. Semenova ◽  
I. D. Kovalev
Keyword(s):  
Combustion Products ◽  
System Composition ◽  
Composition Structure

Strengthening coatings on cutting tools (analytical review of international conference literature)

2020 ◽  
pp. 234-240
Author(s):  
V.A. Levchenko ◽  
Yu.V. Panfilov
Keyword(s):  
Cutting Tools ◽  
International Standards ◽  
Structure And Properties ◽  
International Conference ◽  
Analytical Review ◽  
Composition Structure ◽  
Analytical Equipment

Tendency of strengthening coatings on cutting tools processes evolution is analyzed. Manifold of strengthening materials, strengthening coatings deposition methods, process and analytical equipment for coatings manufacture and measurement of it’s properties is described. International standards for strengthening coatings on cutting tools composition, structure and properties are presented.

Nanostructured powders based on aluminum reinforced by silicon nitride designed for spraying of multifunctional strengthened coatings

2019 ◽  
pp. 65-73
Author(s):  
T. I. Bobkova ◽  
B. V. Farmakovsky ◽  
N. A. Sokolova
Keyword(s):  
Silicon Nitride ◽  
Composite Powder ◽  
High Energy ◽  
Cold Gas Dynamic Spraying ◽  
Powder Materials ◽  
Structure And Properties ◽  
Gas Dynamic ◽  
Composition Structure ◽  
New Phase ◽  
Nanostructured Powders

The work deals with topical issues such as development of composite nanostructured powder materials. The results of creating powders based on the system “aluminum–nitride of silicon” are presented. Complex investigations of the composition, structure and properties of powder materials, as well as coatings formed on their basis by supersonic cold gas dynamic spraying, were carried out. It has been found that the high-energy treatment of a powder mixture of aluminum with nanofibers of silicon nitride provides the formation of a composite powder in which a new phase of the Si(1-х)AlхO(1-х)Nх type is formed, which additionally increases the hardness in the coatings to be sprayed.

ANOPARTICLES ОF PLATINUM(II) OXO-HYDROCOMPLEXES: COMPOSITION, STRUCTURE, FORMATION MECHANISM

2020 ◽  
Vol 61 (11) ◽  
pp. 1709-1720
Author(s):  
S. Yu. Troitskii ◽  
O. A. Belyakova ◽  
A. L. Trigub
Keyword(s):  
Structure Formation ◽  
Formation Mechanism ◽  
Composition Structure

scholarly journals Effect of residence time in the cooker-stretcher on mozzarella cheese composition, structure and functionality

2021 ◽  
pp. 110690
Author(s):  
Ran Feng ◽  
Sylvain Barjon ◽  
Frans W.J. van den Berg ◽  
Søren Kristian Lillevang ◽  
Lilia Ahrné
Keyword(s):  
Residence Time ◽  
Mozzarella Cheese ◽  
Composition Structure

scholarly journals Antiviral Activity of Carrageenans and Processing Implications

Marine Drugs ◽  
2021 ◽  
Vol 19 (8) ◽  
pp. 437
Author(s):  
Milena Álvarez-Viñas ◽  
Sandra Souto ◽  
Noelia Flórez-Fernández ◽  
Maria Dolores Torres ◽  
Isabel Bandín ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Antiviral Activity ◽  
Drug Delivery Systems ◽  
Biological Properties ◽  
Red Seaweed ◽  
Processing Conditions ◽  
Chemical Modifications ◽  
Viral Attachment ◽  
Extraction Stage ◽  
Composition Structure

Carrageenan and carrageenan oligosaccharides are red seaweed sulfated carbohydrates with well-known antiviral properties, mainly through the blocking of the viral attachment stage. They also exhibit other interesting biological properties and can be used to prepare different drug delivery systems for controlled administration. The most active forms are λ-, ι-, and κ-carrageenans, the degree and sulfation position being determined in their properties. They can be obtained from sustainable worldwide available resources and the influence of manufacturing on composition, structure, and antiviral properties should be considered. This review presents a survey of the antiviral properties of carrageenan in relation to the processing conditions, particularly those assisted by intensification technologies during the extraction stage, and discusses the possibility of further chemical modifications.

scholarly journals Synthesis of the Bacteriostatic Poly(L-Lactide) by Using Zinc (II)[(acac)(L)H2O] (L = Aminoacid-Based Chelate Ligands) as an Effective ROP Initiator

2021 ◽  
Vol 22 (13) ◽  
pp. 6950
Author(s):  
Renata Barczyńska-Felusiak ◽  
Małgorzata Pastusiak ◽  
Piotr Rychter ◽  
Bożena Kaczmarczyk ◽  
Michał Sobota ◽  
...  
Keyword(s):  
Schiff Bases ◽  
Antibacterial Properties ◽  
Antimicrobial Effect ◽  
Zinc Complexes ◽  
Antibacterial And Antifungal Activities ◽  
Aspergillus Brasiliensis ◽  
Acetylacetonate Complex ◽  
Distorted Trigonal Bipyramid ◽  
Composition Structure ◽  
Antibacterial And Antifungal

The paper presents a synthesis of poly(l-lactide) with bacteriostatic properties. This polymer was obtained by ring-opening polymerization of the lactide initiated by selected low-toxic zinc complexes, Zn[(acac)(L)H2O], where L represents N-(pyridin-4-ylmethylene) tryptophan or N-(2-pyridin-4-ylethylidene) phenylalanine. These complexes were obtained by reaction of Zn[(acac)2 H2O] and Schiff bases, , the products of the condensation of amino acids and 4-pyridinecarboxaldehyde. The composition, structure, and geometry of the synthesized complexes were determined by NMR and FTIR spectroscopy, elemental analysis, and molecular modeling. Both complexes showed the geometry of a distorted trigonal bipyramid. The antibacterial and antifungal activities of both complexes were found to be much stronger than those of the primary Schiff bases. The present study showed a higher efficiency of polymerization when initiated by the obtained zinc complexes than when initiated by the zinc(II) acetylacetonate complex. The synthesized polylactide showed antibacterial properties, especially the product obtained by polymerization initiated by a zinc(II) complex with a ligand based on l-phenylalanine. The polylactide showed a particularly strong antimicrobial effect against Pseudomonas aeruginosa, Staphylococcus aureus, and Aspergillus brasiliensis. At the same time, this polymer does not exhibit fibroblast cytotoxicity.

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