International scientific and educational summer school of restoration at SPbGASU: unique experience of working at a cultural heritage site

Translation. Region: Russian Federal

Source: Saint Petersburg State University of Architecture and Civil Engineering –

An important disclaimer is at the bottom of this article.

Participants of the summer school

The projects of the international scientific and educational summer school of restoration “Preservation and regeneration of the cultural heritage of the historical zones of St. Petersburg and the Leningrad region” were defended.

The summer school was attended by 12 students from Greece, Kazakhstan, Kazan and St. Petersburg. Gathered in teams, they worked on a historical heritage site and a concept for preserving and developing the historical territory of the unique wooden Church of the Nativity of the Blessed Virgin Mary. The current church is located in the village of Listvenka, Boksitogorsk District, Leningrad Region, and is a cultural heritage site of federal significance. This is one of the oldest church buildings in the Leningrad Region – it was built in 1599 and rebuilt in 1720.

"For students, the summer school was an excellent opportunity to test their restoration skills, gain unique experience and work in a team. All the projects presented were completed at a fairly high level. As part of the summer school, students conducted comprehensive studies of the cultural heritage site, including analysis of archival documents and photo recording, developed and discussed the concept of its preservation," said Nadezhda Akulova, associate professor of the Department of Architectural and Urban Heritage at SPbGASU.

Anatoly Shlykov, a student at the Kazan State University of Architecture and Civil Engineering, admits that participation in the summer school was unplanned, but in the end it gave him a wonderful opportunity to work with an ancient object, meet wonderful people, and most importantly, work in a team that loves what they do.

A student from Greece, Emilia Chaidemenaki, agrees with him, believing that the summer school united and made friends with future restorers from different parts of the world.

"I got a truly unique experience of working in Russia in general and with one of the oldest church buildings in the Leningrad region in particular. In addition, I became a member of an international team. It's great that the summer school at SPbGASU opens up such a wonderful opportunity for us, students from different countries," shared Emilia Khaidemenaki.

Please note: This information is raw content obtained directly from the source of the information. It is an accurate report of what the source claims and does not necessarily reflect the position of MIL-OSI or its clients.

.

The CSR discussed how platform employment regulation will develop

Translation. Region: Russian Federal

Source: Ministry of Economic Development (Russia) – Ministry of Economic Development (Russia) –

An important disclaimer is at the bottom of this article.

The Center for Strategic Research held a round table entitled "Platform Employment in the New Conditions: What Changes After the Law on the Platform Economy." Together with representatives of the Ministry of Economic Development, the State Duma, the expert and academic community, as well as leading digital platforms, they discussed the adopted law on the platform economy and future regulatory detailing at the level of by-laws.

According to the participants, the adopted law was an important step in the formation of a basic regulatory framework, but it is now that the most subtle and meaningful part of the work begins – filling this framework with tools, concepts and mechanisms.

The moderator of the round table, CEO of the CSR Pavel Smelov noted: "Russia is one of the few countries where digital platforms have become a truly systemic part of the economy. We have not just implemented technologies, we have created our own model – and this is a serious competitive advantage. Now our task is not to lose our leadership, to take the next step – to turn the platform economy into a full-fledged export model. It is no longer just about technologies, but about a new logic of the economic structure that can be transmitted beyond the country's borders."

Also, in his opinion, the key direction of the next stage is the issue of platform employment: "We are already living in a new reality: there is a platform, there is a platform economy, and we still continue to hold on to the old model of social security, as if nothing has changed. The social security system needs to be revised taking into account how the employment market is actually structured today. People are developing other principles of financial stability: investments, a safety net, additional income. Therefore, it is important not only to protect, but also to educate – to help people navigate modern work formats and make informed decisions. Especially when it comes to those for whom the platform is not their main, but additional employment."

The Ministry of Economic Development emphasized that the implementation of the law will require a flexible and consistent approach, especially in terms of employment. The main focus in the coming months is work on by-laws, the launch of a digital platform registry mechanism, and the preparation of clarifications.

“Russia has made great strides in developing the platform economy: we already have our own effectively functioning models that are of interest abroad. But it is important not to stop there. Platforms are developing rapidly, and regulation should not slow down, but rather accompany this process, be flexible and targeted. We see that citizens make decisions based not only on the logic of the future, but also on current circumstances — and pensions and social guarantees are not always perceived as real values. Therefore, the platform can become a channel through which we will rethink social policy — at the level of product, convenience, and trust. We have examples when digital, platform services became a necessary tool for performers to legalize and comply with legal requirements, including the calculation and payment of taxes. Platform tools have proven their convenience and demand. In turn, this approach provides additional opportunities to ensure control by the state. Our task today is not to go to extremes, but to maintain an open dialogue, flexibility, and thoughtfulness. This is precisely the strength of the platform economy,” said Vladimir Voloshin, Director of the Department of Digital Development and Data Economy at the Ministry of Economic Development.

State Duma Deputy Stanislav Naumov reported that an expert council will be created under the Committee on Economic Policy, which will undertake in-depth study of unresolved issues.

"In September, we are ready to move on. For me personally, there are three priorities today. The first is export orientation: platforms should help Russian businesses enter foreign markets, and not just regulate access of foreign players to ours. The second is the development of internal B2B interaction, where online platforms can become a full-fledged infrastructure for cooperation between suppliers. And the third is the use of platforms to improve the efficiency of state and municipal procurement," he said.

As for platform employment, according to the deputy, this is not just a regulatory issue – it is a question of filling the social fund and, as a result, a real opportunity to increase the minimum level of pensions in those regions where it is objectively insufficient today. "This is how I understand the social task of regulation," he concluded.

Business supported the general vector, but drew attention to the need for a differentiated approach. Industry representatives emphasized that uniform standards for platforms with fundamentally different models — from marketplaces to service aggregators — could result in risks for flexibility and employment.

"The platform economy has already changed the market, and the self-employed regime has proven that people are ready to come out of the shadows if they are offered transparent and convenient conditions. Let's not abolish what works, but rebuild the old – so that the economy, employment and the contribution system develop synchronously," said Anton Danilov-Danilyan, Deputy Chairman of Delovaya Rossiya, head of the working group of transport service aggregators at the Russian Union of Industrialists and Entrepreneurs. According to Yuri Bogdanov, General Director of the Association of Digital Platforms, "it is digitalization, platform development and the tax regime on professional income that give the state a chance to oust gray practices through transparency."

"Platform employment is being formed to a greater extent in industries with high demand for flexible types of employment, allowing for the expansion of participation of various groups of the population in the economy. Therefore, it is important not just to offer them standard social benefits, but to understand what they really need and what they are ready to use," noted Rimma Chichakyan, Director of Legal Affairs and Government Relations at Yandex Taxi.

Ozon representative Alexander Vasiliev supported this position. "We are no longer living in an industrial economy, but in a post-industrial economy, and regulation should take this into account. At the same time, it is important to maintain a choice between different employment formats and not limit new models," he noted.

The participants of the discussion agreed that the development of the platform economy does not require strict regulation, but rather fine-tuning and careful attention to specifics. Among the priority areas, the participants highlighted the need to clarify the criteria for the integrity of platforms, the formation of mechanisms for distinguishing employment from shadow schemes, as well as work on the status of the performer and protection tools. Particular attention was paid to the creation of a sustainable format for dialogue between the state, business and experts – both on the parliamentary platform and within the framework of the implementation of the law in practice.

Please note: This information is raw content obtained directly from the source of the information. It is an accurate report of what the source claims and does not necessarily reflect the position of MIL-OSI or its clients.

.

The deadline for accepting applications for the XI All-Russian Prize "For Loyalty to Science" has been extended

Translation. Region: Russian Federal

Source: Official website of the State –

An important disclaimer is at the bottom of this article.

The State University of Management invites you to take part in the XI All-Russian Prize "For Loyalty to Science". Applications are accepted until August 17.

Participants may include scientists, journalists, press service workers popularizing Russian science, as well as business representatives who have made a significant contribution to supporting the prestige of professional scientific activity and popularizing domestic scientific achievements.

This year the Award includes 11 nominations:

Scientific press service of the year. Scientific journalist of the year. Author of digital content. Recognition. Russian science to the world (nomination named after Konstantin Eduardovich Tsiolkovsky). On the use of artificial intelligence technology in scientific research. Working with experience: scientists' contribution to the Victory. Science for children. Special prize named after Khristophor Ledentsov. Special prize named after Daniil Granin. Special prize for the 80th anniversary of the nuclear industry.

All winners will receive a cash prize from the Art, Science and Sport charity foundation, and the winners of the Special Prize for the 80th Anniversary of the Nuclear Industry nomination will also go on a trip on a nuclear icebreaker organized by the Rosatom State Corporation.

The award ceremony will take place at the end of October in Moscow.

Let us recall that the All-Russian Prize "For Loyalty to Science" is awarded annually for outstanding achievements in the field of scientific communication, popularization of scientific achievements and support of the prestige of scientific activity in the Russian Federation. In 2022, the Prize became one of the flagship projects of the Decade of Science and Technology announced by the President of Russia.

You can find out more about the Award and submit an application on the official website, and ask any questions by email at zavernostnauke@minobrnauki.gov.ru.

Please note: This information is raw content obtained directly from the source of the information. It is an accurate report of what the source claims and does not necessarily reflect the position of MIL-OSI or its clients.

.

The Ministry of Economic Development supported the Kaliningrad Region's application for the construction of the Belaya Dune resort

Translation. Region: Russian Federal

Source: Ministry of Economic Development (Russia) – Ministry of Economic Development (Russia) –

An important disclaimer is at the bottom of this article.

On July 28–29, Deputy Minister of Economic Development of Russia Svyatoslav Sorokin visited the Kaliningrad Region on a working visit. One of the key topics was the development of infrastructure on the Baltic Sea coast. The Ministry of Economic Development gave a positive opinion on the region’s application to build the Belaya Dune resort — the project can receive preferential financing through the mechanism of treasury infrastructure loans.

The resort "White Dune" near the village of Yantarny has been applied for funding under the national project "Tourism and Hospitality". The application involves the construction of engineering infrastructure – access roads, electricity and gas supply systems.

"The region is counting on treasury loans at 3% per annum for a period of 15 years. We have given a positive opinion on the application. The final decision will be made by the presidium of the government commission on regional development," said Svyatoslav Sorokin.

The main topic of the trip was monitoring the implementation of the state program "Socio-economic development of the Kaliningrad region". Over 10 years, 400 billion rubles were allocated from the federal budget within the framework of the program. These funds made it possible to build more than 200 objects – from roads and hospitals to coastal protection.

The Deputy Minister inspected the facilities in Svetlogorsk: work is underway to build an embankment and anti-landslide structures.

"The program remains a strategic instrument for the development of the region. It is important that the authorities of the Kaliningrad Region respond flexibly to changes related to the challenges of the time, including the consequences of sanctions pressure on business. We also discussed options for solving these problems with colleagues. A comprehensive approach is needed: maximum use of various types of support from the federal budget and prompt development of regional programs where necessary. The Kaliningrad Region is already taking serious steps in this direction," noted Svyatoslav Sorokin.

Currently, the region has a Special Economic Zone with more than 300 residents. Companies have already invested over 300 billion rubles, creating jobs and tax returns.

"SEZ residents produce about 40% of all goods and services in the region and provide half of the tax revenues. They are key employers and investors," the deputy minister emphasized.

During the visit, Svyatoslav Sorokin visited two key enterprises in the region. The Sodruzhestvo Group of Companies is a leading producer of plant protein for the feed industry, providing up to 15% of the needs of the entire feed industry in Russia. The company is one of the five largest taxpayers in the region.

The Avtotor Group of Companies is one of the largest employers in the region, and together with related industries, it provides employment for over 30,000 people. The company is currently implementing a project to launch the production of compact electric vehicles on its own technological platform.

Please note: This information is raw content obtained directly from the source of the information. It is an accurate report of what the source claims and does not necessarily reflect the position of MIL-OSI or its clients.

.

Alexander Novak made a working visit to the Kingdom of Saudi Arabia

Translation. Region: Russian Federal

Source: Government of the Russian Federation – Government of the Russian Federation –

An important disclaimer is at the bottom of this article.

Meeting of Alexander Novak with the co-chairman of the Joint Russian-Saudi Intergovernmental Commission on Trade, Economic, Scientific and Technical Cooperation, Minister of Energy of Saudi Arabia Prince Abdulaziz bin Salman Al Saud

Deputy Prime Minister of the Russian Federation Alexander Novak made a working visit to the Kingdom of Saudi Arabia. He met with the co-chairman of the Joint Russian-Saudi Intergovernmental Commission on Trade, Economic, Scientific and Technical Cooperation, Minister of Energy of Saudi Arabia Prince Abdulaziz bin Salman Al Saud.

The participants discussed cooperation within the Joint Russian-Saudi Intergovernmental Commission on Trade, Economic, Scientific and Technical Cooperation and the results of the implementation of the instructions of the co-chairs of the commission following the last meeting. The parties noted with satisfaction the recent opening of direct flights between the two countries, the signing of several memorandums of understanding in various areas, such as industry, education, media, as well as in terms of organizing the Hajj.

During the talks, the parties discussed prospects for increasing trade turnover and expanding cooperation in key economic sectors of mutual interest. The parties also discussed preparations for the ninth meeting of the intergovernmental commission, which will be held in Riyadh on November 6 this year.

Another topic of negotiations was the situation on the oil market and the prospects for cooperation between the two countries within OPEC.

Please note: This information is raw content obtained directly from the source of the information. It is an accurate report of what the source claims and does not necessarily reflect the position of MIL-OSI or its clients.

.

Leonid Yakubovich, People's Artist of Russia

Translation. Region: Russian Federal

Source: Government of the Russian Federation – Government of the Russian Federation –

An important disclaimer is at the bottom of this article.

Mikhail Mishustin congratulated the actor, screenwriter, and TV presenter on his 80th birthday.

The telegram, in particular, notes:

"You are rightfully considered a legend of Russian television. Talent and creative energy, subtle irony allowed you to become one of the brightest TV presenters. For many years you have been on the air of the capital show "Field of Miracles". Thanks to you, the program continues to enjoy great popularity.

I wish you creative success, interesting projects, health and all the best."

Please note: This information is raw content obtained directly from the source of the information. It is an accurate report of what the source claims and does not necessarily reflect the position of MIL-OSI or its clients.

.

Delegations from China's top universities visited Polytechnic University

Translation. Region: Russian Federal

Source: Peter the Great St. Petersburg Polytechnic University –

An important disclaimer is at the bottom of this article.

Peter the Great St. Petersburg Polytechnic University recently hosted delegations from top Chinese universities: Tsinghua University (20th place in the QS ranking), Zhejiang University (49th place in QS), and Peking University (13th place in QS).

Study visits to prestigious partner universities in foreign countries are a mandatory element of the educational program at Chinese universities. That is why every summer students from China come to the Polytechnic University to develop scientific and educational cooperation and exchange best practices in working with young people.

The delegation of Tsinghua University (SPbPU's strategic partner), headed by the deputy secretary of the party committee of the university's Youth Union, Chen Zhihao, consisted of student activists (secretaries of faculty committees of the Komsomol, postgraduates and masters). The visit was organized within the framework of the elite program for training personnel reserves and future leaders of Tsinghua University, implemented under the auspices of the Communist Youth Union of China.

The introduction to the history and infrastructure of SPbPU began with a tour of the Main Academic Building (White Hall, library, portrait gallery) and the SPbPU History Museum. The key point was a visit to the Youth Trajectory Center in the Polytech Tower — a modern space for student life, project activities, and interaction with industry. At a meeting with Ivan Khlamov, Head of the SPbPU Youth Policy Department, the guests discussed options for involving young people in scientific and technical creativity, project work, developing leadership skills, and a mentoring system. Colleagues from Tsinghua presented the successful experience of their university ecosystem for supporting innovation and entrepreneurship, including the Lighthouse program, Challenge Cup and Entrepreneurship Competitions, as well as the Innovation Plus incubator, which has grown hundreds of startups with a total funding of about 5 billion rubles.

The study visit of the best students of Zhejiang University to the Polytechnic is a long-standing tradition that has been strictly observed throughout the years of strategic partnership between our universities. The envoys from the Faculty of Mechanical Engineering were led by its international coordinator Qiu Yixin.

The program included an introduction to the historical heritage of the university, a visit to the modern laboratories of the Institute of Mechanical Engineering, Materials and Transport, and a working meeting with representatives of the SPbPU International Service. The students visited the innovative laboratories of IMMiT and learned about the latest developments of research groups and young scientists of the institute.

Chinese students were presented with opportunities to study at SPbPU, in particular within the framework of additional programs, summer and winter schools. The guests highly appreciated the educational potential of the Polytechnic University, including that already implemented in partnership with Chinese universities, and expressed interest in creating a joint program in the field of mechanical engineering.

In addition to students, the representative delegation from Peking University included Dean of the College of Chemistry and Molecular Engineering Peng Hailin, Dean of the Faculty of Materials Science and Engineering Zou Ruqiang, Professor of the Faculty of Physics Wang Xinqiang, and other scientists.

The visit was eventful: the guests were divided into groups according to their scientific interests to visit specialized laboratories, where they got acquainted with the advanced research of SPbPU in the field of new materials, energy and microelectronics. Of particular interest were the developments of carbon nanomaterials, artificial intelligence for chemistry and promising catalysts. The visit ended with presentations of scientific areas of both universities.

The past visits demonstrated the mutual interest of Russian and Chinese universities in deepening cooperation, the desire to organize interaction not only between leading scientists, but also among young researchers. As noted by representatives of SPbPU, such meetings help not only to exchange best practices in education and science, but also to create a solid foundation for future joint projects, student initiatives, entrepreneurship. Particular attention was paid to student mobility, academic exchange programs, joint participation in student conferences and youth initiatives. The doors of the Polytechnic University are always open to students of partner universities in China.

Please note: This information is raw content obtained directly from the source of the information. It is an accurate report of what the source claims and does not necessarily reflect the position of MIL-OSI or its clients.

.

Information about the competition lists

Translation. Region: Russian Federal

Source: Official website of the State –

An important disclaimer is at the bottom of this article.

Dear applicants of the State University of Management, we publish up-to-date information on the competition lists. They can be viewed in two ways.

The first is on a special page of the SUM website, where you can find yourself using your unique applicant number.

The second is on the State Services portal using the following algorithm: – Find SUM in the university selection service; – Select a direction; – Expand the program; – Open “Lists of applicants” and “Competition lists”; – Find yourself using your unique applicant number.

The lists for the budget and quotas have already been published. Preliminary lists for the contract will appear on August 10. The order for transfer to the budget – August 7.

Please note: This information is raw content obtained directly from the source of the information. It is an accurate report of what the source claims and does not necessarily reflect the position of MIL-OSI or its clients.

.

Kirill Prigoda is our champion!

Translation. Region: Russian Federal

Source: Peter the Great St. Petersburg Polytechnic University –

An important disclaimer is at the bottom of this article.

The renowned polytechnician, assistant of the Higher School of Sports Education of the Institute of Physical Culture and Sport, Kirill Prigoda became the winner of the World Aquatics Championships in Singapore. He won gold in the 4×100 m combined relay. And before that, he won silver in the individual event at the 50 m breaststroke.

The World Championships are being held in Singapore from July 11 to August 3. On July 30, Kirill Prigoda, Miron Lifintsev, Darya Klepikova and Darya Trofimova won the combined relay. Our team not only won a confident victory in the final, but also set a new world championship record – 3:37.37. This victory went down in history – before it, Russian swimmers had not won the relay at major international tournaments for 22 years! The last time our athletes won was in 2003. Then Kirill Prigoda was seven years old.

The emotions are very pleasant, because the team gave 110%. The guys are great, but the championship is not over yet. We will celebrate at the end of the competition, – said Kirill Prigoda on air at Match TV.

Let us remind you that the Russian team is performing in Singapore in a neutral status. Thus, during the swim it was forbidden to chant "Russia". This is a strict condition of the International Swimming Federation. The team was given a special guide. If we violated it, we were threatened with exclusion from the championship. And even though we did not see the Russian flag or hear our anthem at the awards ceremony, everyone in the world understood that the Russians were on the top step of the podium.

Less than an hour before the team victory, Kirill Prigoda secured the title of vice-champion in the 50-meter breaststroke. In the final swim, he showed a result of 26.62 seconds. This medal was the 11th for the Russians and the first personal award for Russian swimmers at the current championship.

We are proud of Kirill and once again we are convinced that Polytechnic University helps develop abilities and talents in science, creativity, and sports! – noted SPbPU Rector Andrey Rudskoy.

Kirill Prigoda is already an eight-time world champion! He is also a four-time world championship medalist, a two-time European champion, and a silver and bronze medalist at the European Short Course Championships. He currently holds three world records.

The World Championships are ongoing, and Kirill Prigoda has a great opportunity to add to the Russian team’s medal collection.

Photo: © RIA Novosti / Maxim Bogodvid / EPA / TASS

Please note: This information is raw content obtained directly from the source of the information. It is an accurate report of what the source claims and does not necessarily reflect the position of MIL-OSI or its clients.

.

NSU student finds out that water has a huge impact on the elastic properties of hydrogel

Translation. Region: Russian Federal

Source: Novosibirsk State University –

An important disclaimer is at the bottom of this article.

The effect of water on the longitudinal gigahertz elastic modulus of collagen-based hydrogel was studied by a student of the Department of Physical Methods of Solid State Research using optical spectroscopy methods Faculty of Physics, Novosibirsk State University Anna Laktionova under the scientific supervision of Valeria Zykova, PhD in Physics and Mathematics, Senior Researcher at the Institute of Automation and Electrometry SB RAS. The data from this study became the basis for her master's thesis, which she successfully defended this year. In her work, she used optical research methods – Mandelstam-Brillouin scattering (MBS) spectroscopy and Raman spectroscopy.

— Changes in the elastic properties of biological objects may be associated with disruptions in the functioning of living cells, in such cases, information about the elastic modulus plays a key role. Currently, a contactless and non-invasive technique for characterizing the viscoelastic properties of materials is actively developing – Mandelstam-Brillouin scattering spectroscopy (MBS), which has proven itself in application to biomedical problems. MBS spectroscopy allows obtaining information about the speed of sound in a substance and the gigahertz elastic modulus. However, when studying real biotissues, difficulties arise in interpreting experimental data that are associated with the multicomponent composition of the studied objects and small changes in the elastic modulus due to pathologies occurring in the bioobject. This is due to the fact that the main contribution to the elastic modulus value in the case of real tissues is made by the water component, the content of which is quite high for the case of biological samples. For this reason, researchers often use simpler model two-component objects instead of real tissues, which are hydrogels, in particular, collagen-based hydrogels. By varying the water content, various parameters of viscoelastic properties are achieved, thereby hydrogels imitate the properties of a wide variety of real tissues, explained Anna Laktionova.

Samples of collagen -based hydrogels with different water content were made for conducting research. Further, with the help of a number of optical techniques (RMB, cattle, low -frequency cattle and depolarized light scattering), Anna described the elastic and relaxation properties of manufactured hydrogels. Spectra measurement was made during drying of hydrogel samples in the air. This was done in order to observe how, depending on the content of water in the sample, its elastic properties are changed, determined from the parameters of the spectrum of light scattering. With the dehydration of the sample from the most hydrated state (water content of 99.5 %) to a completely dry elasticity module increases by 6 times. At the same time, significant growth is observed with protein concentrations above 60 %. For a detailed study of such behavior, two spectrometers were required to synchronously measure the spectra of RMB and CRC. In this regard, some difficulties arose. The devices were in different rooms, which could affect the accuracy of measurements: while the sample was transferred from one office to another, it could be subjected to undesirable exposure to external factors, which would lead to its additional drying. To characterize the content of water in the samples and their elastic module from the same point in the process of drying, participants in the experiment, which was conducted in the spectroscopy laboratory of the condensed media of the Institute of Automation and Electrometry of the SB RAS, established a fiber -fiber channel between two spectrometers. This technical solution was implemented for the first time in Russia.

The analysis of the dependence of the Brillouin line position on the protein concentration in the hydrogel showed that the value of the gigahertz elastic modulus changes almost 6 times within the full range of concentrations (water content 0 – 100%). This is a very significant change. Earlier in the literature it was demonstrated that in the case of chemical treatments it is only a few percent. This fact fully demonstrates the strong influence of water. The resulting concentration dependence of the elastic modulus was described by a model considering the hydrogel as a rigid protein framework filled with water.

— From the analysis of the shape of the Brillouin spectrum of hydrogels, a non-trivial dependence of the Brillouin line width on the protein content was obtained. It is generally accepted, at least for single-component systems, that the Brillouin line width characterizes the viscosity of the object under study. However, in our case, everything was not so simple. When the hydrogel dried, the Brillouin line width actually increased to protein concentrations of about 70%, where the dependence extremum was observed. With further dehydration, up to completely dry collagen, the Brillouin line width narrowed. According to our assumptions, the reason for such an unexpected result lies in the influence of relaxation processes on the shape of the Brillouin spectrum of the hydrogel. To confirm this hypothesis, it was necessary to conduct a study using another spectroscopic technique – depolarized light scattering spectroscopy, – said Anna Laktionova.

A comprehensive comparison of the behavior of the RMB line width and the shape of the depolarized spectrum made it possible to verify the relaxation nature of the Brillouin line broadening with a change in water content. The results of RMB spectroscopy of hydrogels with different water contents for several temperatures (25, 0, -10 °C) additionally confirmed the influence of relaxation processes on the Brillouin line width, explained Anna Laktionova.

The analysis of the obtained results allowed us to obtain complete information on the nature of the interaction of the biopolymer matrix with the water component and to study in detail the issue of the influence of the water component on the parameters of the Brillouin spectrum of a hydrogel with different degrees of hydration. The participants of the study came to the conclusion: the work done demonstrates the prospects of the complex application of spectroscopic techniques (RMB, Raman, low-frequency Raman and depolarized light scattering) for characterizing the properties of hydrogels and studying the issue of the interaction of water with the protein matrix.

— It is very important to study the effect of water on the elastic properties of collagen-based hydrogel using optical methods, because such an object is simple enough to interpret spectral data, while it is capable of imitating the mechanical properties of more complex biological objects. This work, using such simple objects as an example, demonstrates the capabilities of optical spectroscopy methods, which in the future can be used to study more complex real tissues, — said Anna Laktionova.

Material prepared by: Elena Panfilo, NSU press service

Please note: This information is raw content obtained directly from the source of the information. It is an accurate report of what the source claims and does not necessarily reflect the position of MIL-OSI or its clients.

.