FEATURES OF OBTAINING GELS BASED ON AGAR-AGAR FOR COSMETOLOGY AND MEDICINE WITH ANTIBACTERIAL PROPERTIES

2021 ◽  
pp. 67-74
Author(s):  
V. Lebedev ◽  
D. Miroshnichenko ◽  
E. Lendich ◽  
L. Borisenko ◽  
D. Savchenko ◽  
...  
Keyword(s):  
Humic Acids ◽  
Antibacterial Effect ◽  
Antibacterial Properties ◽  
Point Of View ◽  
Modern World ◽  
Protective Properties ◽  
Polymer Hydrogels ◽  
Polymer Carriers ◽  
High Antibacterial Activity ◽  
Effective Use

In the modern world, special attention is paid to materials with controlled characteristics. In this aspect, polymers and materials based on them have a number of specific properties for effective use in medicine and cosmetology. Humic substances satisfy most of these features, so their use is very important. The study of the features of the processes of gelation in polymer systems such as agar-agar, which has rather universal properties, makes it possible to use it as a basis for gels and polymer carriers, as well as in the processes of obtaining medical and cosmetic materials with different properties, which can be important in solving a number of topical issues. In particular, these are lightweight and cheap to manufacture antiseptic gels, dressings on wounds with absorption and protective properties, all kinds of cosmetics. In the article, a study was carried out to study the processes of gelation and the features of the rheological properties of hydrogels based on agar-agar in order to obtain modern hydrogels with an antibacterial effect. It was found that the introduction of humic acids into the composition of polymer hydrogels slows down the processes of structure formation, which leads to a decrease in the viscosity of all the studied compositions. Also, a decrease in the melting temperature of hydrogel jellies with an increase in the content of humic acids in them indicates a reduced level of gelation, which also leads to an increase in the time of loss of stickiness of polymer hydrogels. It has been shown that humic acids in polymer hydrogels have high antibacterial activity and almost completely stop the processes of mold formation in them. It was found that the most effective from the point of view of obtaining hydrogels with an antibacterial effect are agar-agar compositions with a humic acid content of 15 %. Thus, cosmetic polymer hydrogels with an antibacterial effect have been developed, which can be used in the treatment of hands, face and other areas of the skin that are open and contact for humans to combat coronavirus bacteria.

scholarly journals Enhanced Conductivity and Antibacterial Behavior of Cotton via the Electroless Deposition of Silver

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 4731
Author(s):  
Changkun Liu ◽  
Dan Liao ◽  
Fuqing Ma ◽  
Zenan Huang ◽  
Ji’an Liu ◽  
...  
Keyword(s):  
Electroless Deposition ◽  
Deposition Time ◽  
Antibacterial Properties ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
High Antibacterial Activity ◽  
Physical And Chemical ◽  
And Staphylococcus Aureus ◽  
Enhanced Conductivity ◽  
And Chemical Properties

In this study, the surface-initiated atom transfer radical polymerization (SI-ATRP) technique and electroless deposition of silver (Ag) were used to prepare a novel multi-functional cotton (Cotton-Ag), possessing both conductive and antibacterial behaviors. It was found that the optimal electroless deposition time was 20 min for a weight gain of 40.4%. The physical and chemical properties of Cotton-Ag were investigated. It was found that Cotton-Ag was conductive and showed much lower electrical resistance, compared to the pristine cotton. The antibacterial properties of Cotton-Ag were also explored, and high antibacterial activity against both Escherichia coli and Staphylococcus aureus was observed.

Bicomponent multifilament yarns of recycled poly(ethylene terephthalate) and nano-titanium dioxide for antibacterial carpet

2021 ◽  
pp. 152808372110117
Author(s):  
Sommai Pivsa-Art ◽  
Komson Sunyikhan ◽  
Weraporn Pivsa-Art
Keyword(s):  
Antibacterial Activity ◽  
Titanium Dioxide ◽  
Ethylene Terephthalate ◽  
Antibacterial Properties ◽  
Nano Structure ◽  
Elongation At Break ◽  
High Antibacterial Activity ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Multifilament Yarns

Recycled poly(ethylene terephthalate) (RPET) multifilament yarns are used in carpet manufacturing as a way to reduce plastic waste. The conventional RPET carpet is however susceptible to bacterial accumulation. As a result, this research experimentally doped RPET with nano-structure titanium dioxide (nano-TiO2) to produce RPET/nano-TiO2 bicomponent multifilament yarns with antibacterial property. The experimental multifilament yarn structure consisted of two parts: neat RPET core and RPET/nano-TiO2 shell. The nano-TiO2 content in the shell was varied between 1 and 3 wt% and the core/shell (C/S) ratios between 90/10, 70/30, and 50/50 w/w. The effects of C/S ratio and nano-TiO2 content on the mechanical and antibacterial properties of bicomponent multifilament yarns were determined. The experimental results indicated that the C/S ratio had no effect on the tenacity and elongation at break. Meanwhile, the tenacity and elongation at break of bicomponent fibers increased with nano-TiO2 content in the shell. The TiO2-doped RPET bicomponent yarns effectively inhibited the growth of Escherichia coli and Staphylococcus aureus. The 90/10 bicomponent multifilament fiber with 3 wt% TiO2 achieved the highest antibacterial activity. The very high antibacterial activity was attributable to greater deposition of nano-TiO2 particles near and on the shell surface.

scholarly journals Curcumin: Modern Applications for a Versatile Additive

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 519
Author(s):  
Florentina Monica Raduly ◽  
Valentin Raditoiu ◽  
Alina Raditoiu ◽  
Violeta Purcar
Keyword(s):  
Bacterial Infections ◽  
Natural Compound ◽  
Review Paper ◽  
Curcuma Longa ◽  
Antibacterial Properties ◽  
Point Of View ◽  
Nano Particles ◽  
Synergistic Activity ◽  
Quality Of Food

The recent development of several methods for extracting curcumin from the root of the plant Curcuma longa has led to intensified research on the properties of curcumin and its fields of application. Following the studies and the accreditation of curcumin as a natural compound with antifungal, antiviral, and antibacterial properties, new fields of application have been developed in two main directions—food and medical, respectively. This review paper aims to synthesize the fields of application of curcumin as an additive for the prevention of spoilage, safety, and quality of food. Simultaneously, it aims to present curcumin as an additive in products for the prevention of bacterial infections and health care. In both cases, the types of curcumin formulations in the form of (nano)emulsions, (nano)particles, or (nano)composites are presented, depending on the field and conditions of exploitation or their properties to be used. The diversity of composite materials that can be designed, depending on the purpose of use, leaves open the field of research on the conditioning of curcumin. Various biomaterials active from the antibacterial and antibiofilm point of view can be intuited in which curcumin acts as an additive that potentiates the activities of other compounds or has a synergistic activity with them.

A Zn azelate MOF: combining antibacterial effect

CrystEngComm ◽  
2015 ◽  
Vol 17 (2) ◽  
pp. 456-462 ◽  
Author(s):  
C. Tamames-Tabar ◽  
E. Imbuluzqueta ◽  
N. Guillou ◽  
C. Serre ◽  
S. R. Miller ◽  
...  
Keyword(s):  
Antibacterial Effect ◽  
Metal Organic Framework ◽  
Antibacterial Properties ◽  
Metal Organic ◽  
Organic Framework

A novel biocompatible and bioactive zinc azelate metal–organic framework (BioMIL-5) was hydrothermally synthesized with interesting long-term antibacterial properties.

City’s Cultural Memory: Modern Practices of Symbolizing the Past

2021 ◽  
Vol 18 (4) ◽  
pp. 352-364
Author(s):  
Natalia G. Fedotova
Keyword(s):  
Cultural Memory ◽  
Point Of View ◽  
Fundamental Aspect ◽  
Modern World ◽  
Cultural Meanings ◽  
Urban Identity ◽  
Symbolic Forms ◽  
The Past ◽  
Symbolic Resource ◽  
The City

The article is devoted to the discourse of the city’s cultural memory. The relevance of studying this topic is determined not only by the fundamental aspect associated with the episodicity of existing studies of this phenomenon. From an applied point of view, the city’s cultural memory is a symbolic resource that can be used to create an appealing image, form a sustainable urban identity, and strengthen the citizen’s sense of belonging to the city. The accumulation and objectification of cultural memory take place in symbolic forms, which makes it important to study the practices of symbolizing the urban past, the essence of which is to generate the significance of the relevant or latent layers of cultural memory for the citizens.The article presents the results of the final stage of research related to the study of the process of constructing the cultural memory of the city. The purpose of the article is to analyze modern practices of symbolizing fragments of the urban past, which mean their significance for contemporaries. Basing on the culturological cross-section of the issue, the author integrates different research contexts. The methodological basis of the article is the communicative approach that focuses on the processes of meaning formation, and the constructivist method that considers memory as a multi-layered and dynamic construct. Analyzing the practices of symbolizing the urban past by the example of Russian cities, the author of the article demonstrates how the episodes of the city’s memory are updated in the modern world, how cultural meanings become memorable for citizens. The author uses the results of previous studies and identifies the following elements of the symbolization of the urban past: a) ways of encoding fragments of the past; b) communicative trajectories of memory symbolization; c) factors of producing meanings about the collective past of the city. The obtained results open up new frontiers in understanding the processes of formation of the collective ideas about the city, and prospects for empirical research, forecasting and constructing the cultural memory of Russian cities, giving them the opportunity to change their present and future.

Culture Management through Prism Achievements of Kazakhstan Art

2021 ◽  
Vol 6 (4) ◽  
pp. 104-121
Author(s):  
Assel Imayo ◽  
Aizhan Kalibayeva
Keyword(s):  
Point Of View ◽  
Modern World ◽  
Bottom Line ◽  
Cultural Management ◽  
World Community ◽  
Private Organizations ◽  
Thirtieth Anniversary ◽  
The World ◽  
The Republic ◽  
High Level

2021 year has become time for drawing the bottom line under the achievements in the field of culture and science for 30 years of independence of Kazakhstan. The high level of modern cultural potential, rich cultural heritage have become one of the leading factors in the formation of a positive image of Kazakhstan as a country with a distinctive culture and spiritual traditions that go deep into history. Creative personalities, public policy and private organizations contribute to the development and promotion of Kazakhstan’s art in the world, which invariably arouses interest of the world community. However, a problem of the popularization of Kazakh music, art, film and theater art is still relevant. In addition to examples of achievements and successful cases of Kazakhstan’s culture, in this article the authors try to consider the problem from the point of view of management in culture and show importance of the position of an art manager in the modern world of arts. To implement this issue, the authors studied publications on the achievements of various types of arts in recent years and also took into account reaction of domestic and foreign audiences to cultural products and projects from this area. This article lists specific achievements in the field of academic art. As the analysis of publications on this topic has shown, most of them were implemented by cultural figures in the last decade of independence of the republic. At the forefront is the question of the consistency and well-coordinated interaction of cultural management with the creative component of the academic sphere of art in Kazakhstan. And the most striking examples of successful cases of such interaction are given as well. This study has analytical value and can be presented at seminars and conferences as a demonstration of examples of achievements for reporting presentations in the year of the celebration of the thirtieth anniversary of Kazakhstan's independence.

Creativity from perspective of axiology

2021 ◽  
Vol 92 (2) ◽  
pp. 10-20
Author(s):  
A. V Kiriakova ◽  
◽  
V.V. Moroz ◽  
Keyword(s):  
Evolutionary Process ◽  
Value Orientations ◽  
Point Of View ◽  
Modern World ◽  
Collective Creativity ◽  
The Social ◽  
Wide Range ◽  
Interdisciplinary Knowledge ◽  
Main Components ◽  
The Individual

Interest in creativity as a subject of research has been growing exponentially since the second half of the 20th century in all areas of human history. A wide range of both domestic and foreign studies allows authors to assert that creativity is a personality trait, inherent to one degree or another. Whereas the development of such trait becomes an urgent necessity in the new reality. The entire evolutionary process of the social development illustrates its dependence on personal and collective creativity. The aim of this research is to study the phenomenon of creativity through the perspective of axiology, i.e. the science of values. Axiology allows us to consider the realities of the modern world from the perspective of not only external factors, circumstances and situations, but also of deep value foundations. Creativity has been studied quite deeply from the point of view of psychology: the special characteristics of a creative person, stages of the creative process, the relationship between creative and critical thinking, creativity and intelligence. Some psychologists emphasize motivation, creative skills, interdisciplinary knowledge, and the creative environment as the main components that contribute to the development of creativity. The authors of the article argue that values and value orientations towards cognition, creativity, self-realization and self-expression are the drivers of creativity. In a broad sense, values as a matrix of culture determine the attitude of society to creativity, to the development of creativity of the individual and the creative class, and to how economically successful a given society will be. Since innovation and entrepreneurship are embodied creativity. Thus, the study of creativity from the perspective of axiology combines the need for a deep study of this phenomenon and the subjective significance of creativity in the context of new realities

Comparative Evaluation of the Sterilization Effect of Six Kinds of Commercial Disinfectants against Four Pathogenic Bacteria

2021 ◽  
Author(s):  
Wenxia Wang ◽  
Xiaoting Liang ◽  
Junxia Zheng ◽  
Qi He
Keyword(s):  
Sodium Hypochlorite ◽  
Peracetic Acid ◽  
Pathogenic Bacteria ◽  
Antibacterial Effect ◽  
Antibacterial Properties ◽  
Water Soluble ◽  
Absolute Ethanol ◽  
Dilution Method ◽  
Clostridium Sporogenes ◽  
Sterilization Effect

Abstract In this work, we systematically investigate the sterilization effect of six kinds of commonly used commercial disinfectants, including the DuPont Virkon disinfectant, peracetic acid disinfectant, sodium hypochlorite, bromogeramine disinfectant, water-soluble allicin, and absolute ethanol, against the Escherichia coli, Staphylococcus aureus, Monilia albican and Clostridium sporogenes. The inhibition zone was used to qualitatively determine the antibacterial effects of the six disinfectants, and then the minimum two-fold dilution method was used to quantitatively determine the minimum inhibitory concentration and minimum bactericidal concentration of the six disinfectants on the four pathogens. The result illustrated that the antibacterial effect of peracetic acid disinfectant is the best, and clostridium sporogenes is the most sensitive to it, followed by bromogermine disinfectant, which can inhibit the four pathogenic bacteria at the concentration recommended by the manufacturer. The antibacterial effect of DuPont Virkon disinfectant, sodium hypochlorite, water-soluble allicin and absolute ethanol is not as good as expected, and cannot inhibit the four kinds of pathogenic bacteria at the recommended concentration. In summary, the antibacterial effect of peracetic acid disinfectant is the strongest, followed by the bromogermine disinfectant, DuPont Virkon disinfectant, sodium hypochlorite and water-soluble allicin. The absolute ethanol exhibits the worst antibacterial properties.

The Properties of Welded Joints Made by 6082-T6 Aluminium Alloy and their Behaviour under Cyclic Loading Conditions

2015 ◽  
Vol 812 ◽  
pp. 375-380 ◽  
Author(s):  
D. Pósalaky ◽  
János Lukács
Keyword(s):  
Cyclic Loading ◽  
Automotive Industry ◽  
Welded Joints ◽  
Structural Engineering ◽  
Physical Simulation ◽  
Base Material ◽  
Point Of View ◽  
Test Results ◽  
Structural Elements ◽  
Effective Use

The magnitude of different aluminium alloys, especially the ones with higher strength, are increasing in the structural engineering, not just the usual applications (like the aerospace industry) but more likely in the automotive industry. There are more assumptions of the effective use of aluminium; we should highlight two important factors, the technological and the applicability criterions. The technological criterion is the joining of structural elements, frequently with welding thus the technological criterion ultimately is the weldability. The assumption of applicability comes from the loading capability of these structures, which is typically cyclic loading so the key issue from the point of view of applicability is the resistance to fatigue. This article represents physical simulation and fatigue test results both on the base material and on the welded joints.

scholarly journals The prospects of introducing the mechanisms of legislative regulation of mobbing in Ukraine

2019 ◽  
Vol 7 (9-10) ◽  
pp. 19-31
Author(s):  
Н. П. Костюк ◽  
Д. О. Скубченко
Keyword(s):  
Legal Protection ◽  
Point Of View ◽  
Constitutional Rights ◽  
Psychological Violence ◽  
Operation Performance ◽  
Social Challenges ◽  
Legislative Regulation ◽  
Psychological Pressure ◽  
Labour Legislation ◽  
Effective Use

The authors of the article have considered the notion of «mobbing» being a destructive element of a work collective performance, its causes and effects both for the employees and for the entire organization. It has been ascertained that this phenomenon is widespread in many countries of the world in particular in the developed ones that study this problem not only from the point of view of personnel management and psychology but take into account the legal estimation concerning the amount of responsibility of mobbers and bringing them to court for unlawful treatment of a particular person. It has been emphasized that the system of the legislative mechanisms of preventing mobbing and providing legal protection of employees and workers from this phenomenon in Ukraine in the conditions of the market relations development that requires the most effective use of the labour resources for enhancing the efficiency of an organization operation performance is to be improved. The experience of the developed European countries in the sphere of the legislative regulation of the psychological pressure in the workplace has been studied in comparison with the current Ukrainian labour legislation in question. It has been urged that the European experience in addressing mobbing in the workplace is to be adopted in the Ukrainian Euro integration processes. The most important factors of the psychological terror of employees and workers have been determined and the individuals who most often suffer from the psychological pressure have been characterized on the basis of statistical data.The judicial practice of settling the cases of mobbing in the workplace in Ukrainian courts have been analyzed. The ineffectiveness of the system of the legal protection of employees and workers as well as the need to improve it have been stressed. The authors have suggested the optimal ways of adapting Ukrainian labour legislation to such modern social challenges as the need to eliminate mobbing in the workplace and its effects which is the main direction in safeguarding the constitutional rights of employees and workers to a safe and healthy workplace environment stipulated by the Ukrainian legislation in force. The prospects of developing legislative regulation of the psychological violence have been paid attention to.

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