32 results on '"Vavra, Jan"'
Search Results
2. Elucidating the structure-dependent selectivity of CuZn towards methane and ethanol in CO2 electroreduction using tailored Cu/ZnO precatalysts.
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Varandili, Seyedeh Behnaz, Stoian, Dragos, Vavra, Jan, Rossi, Kevin, Pankhurst, James R., Guntern, Yannick T., López, Núria, and Buonsanti, Raffaella
- Published
- 2021
- Full Text
- View/download PDF
3. Benefits of the LEADER method for Local Agenda 21 - Case study from their application in the Czech Republic.
- Author
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KOSTALOVA, JANA and VAVRA, JAN
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PUBLIC administration - Abstract
The basic characteristic and comparison of the community-led local development tools: Local Agenda 21, used in public administration generally, and of the LEADER method, used within Local Action Groups (LAGs), is presented in this paper. It analyses their application in the Czech Republic. It discusses the potential synergistic effects of the application of these tools in two rural locations - the areas of two towns (Chrudim and Litomerice), which are leaders in the application of Local Agenda 21 in the Czech Republic. Both towns are members of LAGs - LAG Chrudimsko and LAG Ceske Stredohori. This combination of Local Agenda 21 and LEADER method are mutually supportive. The conclusion discusses recommendations for the improvement of community-led development. [ABSTRACT FROM AUTHOR]
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- 2021
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- View/download PDF
4. Real‐time Monitoring Reveals Dissolution/Redeposition Mechanism in Copper Nanocatalysts during the Initial Stages of the CO2 Reduction Reaction.
- Author
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Vavra, Jan, Shen, Tzu‐Hsien, Stoian, Dragos, Tileli, Vasiliki, and Buonsanti, Raffaella
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COPPER oxide ,TRANSMISSION electron microscopy ,COPPER ,ELECTROLYTIC reduction ,X-ray absorption ,X-ray microscopy ,ELECTROCATALYSTS - Abstract
Size, morphology, and surface sites of electrocatalysts have a major impact on their performance. Understanding how, when, and why these parameters change under operating conditions is of importance for designing stable, active, and selective catalysts. Herein, we study the reconstruction of a Cu‐based nanocatalysts during the startup phase of the electrochemical CO2 reduction reaction by combining results from electrochemical in situ transmission electron microscopy with operando X‐ray absorption spectroscopy. We reveal that dissolution followed by redeposition, rather than coalescence, is the mechanism responsible for the size increase and morphology change of the electrocatalyst. Furthermore, we point out the key role played by the formation of copper oxides in the process. Understanding of the underlying processes opens a pathway to rational design of Cu electro (re)deposited catalysts and to stability improvement for catalysts fabricated by other methods. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
5. Real‐time Monitoring Reveals Dissolution/Redeposition Mechanism in Copper Nanocatalysts during the Initial Stages of the CO2 Reduction Reaction.
- Author
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Vavra, Jan, Shen, Tzu‐Hsien, Stoian, Dragos, Tileli, Vasiliki, and Buonsanti, Raffaella
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COPPER oxide ,TRANSMISSION electron microscopy ,COPPER ,ELECTROLYTIC reduction ,X-ray absorption ,X-ray microscopy ,ELECTROCATALYSTS - Abstract
Size, morphology, and surface sites of electrocatalysts have a major impact on their performance. Understanding how, when, and why these parameters change under operating conditions is of importance for designing stable, active, and selective catalysts. Herein, we study the reconstruction of a Cu‐based nanocatalysts during the startup phase of the electrochemical CO2 reduction reaction by combining results from electrochemical in situ transmission electron microscopy with operando X‐ray absorption spectroscopy. We reveal that dissolution followed by redeposition, rather than coalescence, is the mechanism responsible for the size increase and morphology change of the electrocatalyst. Furthermore, we point out the key role played by the formation of copper oxides in the process. Understanding of the underlying processes opens a pathway to rational design of Cu electro (re)deposited catalysts and to stability improvement for catalysts fabricated by other methods. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
6. Ligand-mediated formation of Cu/metal oxide hybrid nanocrystals with tunable number of interfaces.
- Author
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Varandili, Seyedeh Behnaz, Stoian, Dragos, Vavra, Jan, Pankhurst, James, and Buonsanti, Raffaella
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- 2020
- Full Text
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7. Stability and Degradation Mechanisms of Copper‐Based Catalysts for Electrochemical CO2 Reduction.
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Popović, Stefan, Smiljanić, Milutin, Jovanovič, Primož, Vavra, Jan, Buonsanti, Raffaella, and Hodnik, Nejc
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ELECTROLYTIC reduction ,CATALYSTS ,ELECTROLYSIS ,COPPER - Abstract
To date, copper is the only monometallic catalyst that can electrochemically reduce CO2 into high value and energy‐dense products, such as hydrocarbons and alcohols. In recent years, great efforts have been directed towards understanding how its nanoscale structure affects activity and selectivity for the electrochemical CO2 reduction reaction (CO2RR). Furthermore, many attempts have been made to improve these two properties. Nevertheless, to advance towards applied systems, the stability of the catalysts during electrolysis is of great significance. This aspect, however, remains less investigated and discussed across the CO2RR literature. In this Minireview, the recent progress on understanding the stability of copper‐based catalysts is summarized, along with the very few proposed degradation mechanisms. Finally, our perspective on the topic is given. [ABSTRACT FROM AUTHOR]
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- 2020
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8. Stability and Degradation Mechanisms of Copper‐Based Catalysts for Electrochemical CO2 Reduction.
- Author
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Popović, Stefan, Smiljanić, Milutin, Jovanovič, Primož, Vavra, Jan, Buonsanti, Raffaella, and Hodnik, Nejc
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ELECTROLYTIC reduction ,CATALYSTS ,ELECTROLYSIS ,COPPER - Abstract
To date, copper is the only monometallic catalyst that can electrochemically reduce CO2 into high value and energy‐dense products, such as hydrocarbons and alcohols. In recent years, great efforts have been directed towards understanding how its nanoscale structure affects activity and selectivity for the electrochemical CO2 reduction reaction (CO2RR). Furthermore, many attempts have been made to improve these two properties. Nevertheless, to advance towards applied systems, the stability of the catalysts during electrolysis is of great significance. This aspect, however, remains less investigated and discussed across the CO2RR literature. In this Minireview, the recent progress on understanding the stability of copper‐based catalysts is summarized, along with the very few proposed degradation mechanisms. Finally, our perspective on the topic is given. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
9. DIVERSITY MANAGEMENT IN THE CONTEXT OF CORPORATE SOCIAL RESPONSIBILITY.
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Bednarikova, Marie, Kostalova, Jana, Vavra, Jan, and Halamova, Denisa
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SOCIAL responsibility of business ,PERSONNEL management ,ECONOMIC activity ,CORPORATE image - Abstract
During last years there are many new modern attitudes and trends in the field of human resources management. The article is focused to one of these trends - diversity management. The aim of the authors is to evaluate single components of diversity management namely in the context of corporate social responsibility (CSR). In addition different possibilities of application of diversity management in practice as instruments of CSR are submitted to analysis. The end of this article shows the results of research oriented to experience with diversity management put into practice in the selected companies in the Czech Republic. [ABSTRACT FROM AUTHOR]
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- 2018
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10. COSTING SYSTEM AND NEW WAY OF SELLING IN A SMALL PROCESSING ENTERPRISE.
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Munzarova, Simona, Vavra, Jan, and Blahacek, Daniel
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COST accounting ,SMALL business ,ECONOMIC development ,MANAGERIAL accounting ,DECISION making - Abstract
In today's information environment, information usable for decision-making or economic development is the cornerstone of successful business. Companies build and develop managerial accounting systems as a source of information for efficient management of the company's processes. Enterprises operating in the processing industry are under strong pressure from price competition having significant impact on small companies. Moreover, the companies must continually adapt to a changing environment and come up with innovations of a different nature like product innovation, services, management procedures innovations or, for example, finding new ways of selling. In such situations, it is necessary to know the cost of products or processes. This can be obtained from a carefully and precisely developed costing system, which can be the basis for price decision making, resources allocation and determination of long-term business direction. This paper describes the results of analyzes and evaluation of the cost management and costing systems in the practice of a process manufacturing enterprise, including recommendations for changes to this system. The paper also deals with the integration of managerial accounting into supply chain management. Advantages and disadvantages of a selected new way of selling products are discussed and possibilities of the cost management system application in searching new ways of selling are evaluated. [ABSTRACT FROM AUTHOR]
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- 2018
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11. THE SOCIAL AREA OF CORPORATE SOCIAL RESPONSIBILITY AND ITS CONCEPT IN CHEMICAL ENTERPRISES AS A PART OF THEIR SOCIAL WELFARE.
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Bednarikova, Marie, Vavra, Jan, Munzarova, Simona, and Zvolankova, Veronika
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SOCIAL responsibility of business ,CHEMICAL industry ,EMPLOYEE benefits ,INDUSTRIAL relations ,SOCIAL services ,EMPLOYEE motivation ,EMPLOYEE loyalty - Abstract
This paper deals with the concept of the social area of corporate social responsibility (CSR). Directed interviews conducted in a few large chemical enterprises in the Czech Republic discovered an interesting fact concerning perception of social activities within corporate social responsibility. What is surprising is the fact how often statutory employee care is confused or identified with above-standard care in corporate practice. It is also obvious that employees take a number of above-standard employee benefits for granted. The authors of the paper are considering the ways how enterprises could set their employee care and social responsibility in the social area beyond the statutory scope and present them to the employees and the public. It is possible to expect that each enterprise claiming to be socially responsible is aware of the importance of satisfied and motivated employees for its current and future success, and it should be made visible not only to the employees themselves, but also to the other interest groups appropriately. However, it is also necessary to make sure that the employees (and often also the managers and owners themselves) are aware of all the benefits the enterprise provides them with beyond its obligations. From the psychological point of view it has fundamental impact on motivation and loyalty of employees. [ABSTRACT FROM AUTHOR]
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- 2017
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12. SOCIAL, PHILANTHROPIC AND ETHICAL REPORTING OF THE CHEMICAL COMPANIES.
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Vavra, Jan, Bednarikova, Marie, Munzarova, Simona, and Prochazkova, Klara
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SOCIAL responsibility of business ,BUSINESS ethics ,STAKEHOLDERS ,CHEMICAL industry ,CORPORATE websites - Abstract
Concept of Corporate Social Responsibility requires balanced consideration of environmental, economic, ethic, philanthropic and social issues. The companies' effort to present relevant responsible activities can be considered as ones of the most meaningful reporting goal with strong impacts on important stakeholders as well as on the broad society. Presentation of economic and environmental information via regular reports and static companies' web pages can be considered as a common company practice, but social, philanthropic and ethic areas of Corporate Social Responsibility are still underestimated as well as their presentation. The main objective of the contribution is to evaluate the level of presentation of social, philanthropic and ethical issues among Czech chemical companies. Based on theoretical basis concerning international reporting standards of Corporate Social Responsibility and specific circumstances of chemical industry, a preliminary research was realized among all Czech chemical companies' web pages to assess reported social, philanthropic and ethic activities and indicators. The most important findings are closer analyzed and discussed. The overall web pages research by content analysis was used to identify most often presented social, philanthropic and ethic information an on the other hand to reveal uncommon or neglected social and ethic topics. Assessment of company's social and ethic activities helps to reveal the impact of chemical companies to quality of life for citizens and society surrounding chemical factories and this contribution helps to improve understanding of importance of corporate social, philanthropic and ethical issues and their reporting. [ABSTRACT FROM AUTHOR]
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- 2017
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13. Food Self-provisioning in Europe: An Exploration of Sociodemographic Factors in Five Regions.
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Vavra, Jan, Megyesi, Boldizsár, Dužá, Barbora, Craig, Tony, Klufová, Renata, Lapka, Miloslav, and Cudlínová, Eva
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SOCIODEMOGRAPHIC factors ,FOOD consumption research ,COMPARATIVE studies ,POOR people ,SOCIAL conditions in Europe - Abstract
This article presents the results of an international comparative study on food self-provisioning, an activity still widespread in the countries of the Global North. We collected the data in a sociological survey done in 2010 as a part of the household energy use research project GILDED. We selected a region with urban and rural areas as a case study in each of the five EU countries, including Scotland, the Netherlands, Germany, the Czech Republic, and Hungary. Our article raises two main research questions: (1) What is the level of food self-provisioning in the regions? (2) Who participates in it? Additionally, we inquired into the motivations of self-provisioners using the results of analyses of sociodemographic and food consumption habits for their interpretation. We found that the level of self-provisioning varies considerably among the regions. Its share ranges from 13 percent in Dutch urban areas to 58 percent in German rural areas. The effects of some sociodemographic and geographic factors differ significantly among the countries. However, we can summarize that living in one's own property, living in a house or in a rural area, having a partner or children, being retired, or having a low income increases the probability of food self-provisioning. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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14. CODE OF ETHICS IN THE REPORTING OF CORPORATE SOCIAL RESPONSIBILITY ACTIVITIES, THE EVIDENCE FROM THE CZECH CHEMICAL COMPANIES.
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Munzarova, Simona, Lostakova, Hana, Vavra, Jan, Bednarikova, Marie, and Kurtulikova, Nikol
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SOCIAL responsibility of business ,CORPORATE image ,COMPETITIVE advantage in business ,BUSINESS ethics ,CHEMICAL industry - Abstract
Current interest in corporate social responsibility (CSR), primarily caused by pressure from various stakeholders, continues to grow. Socially responsible behavior can enhance the corporate image, the protection of the enterprise's environment might bring easier development of its activities in this environment, many authors also highlights the potential for building a competitive advantage in the form of consistent values of the enterprise with its key stakeholders. On the other hand, businesses are often suspected of issuing advertising and public relations activities for ethical behavior. One of the principles that should be followed in a socially responsible company is the ethical behavior. Ethical principles and emphasis on certain self-restraint, on a voluntariness and refrain some kind of behavior has triggered formation of social responsibility. Definition of the ethical values of the company must be based on dialogue with its key stakeholders. Among the important tools of social responsibility belongs communication and transparency of corporate conduct to its relevant stakeholders. To be a social responsibility not only proclaimed but actually implemented, the presentation of it should use systems of indicators that objectively record the progress. Selecting areas of CSR activities, indicators and methods of their acquisition and disclosure might significantly affect the quality of relationships between the company and stakeholders. The article deals with the role that the ethical aspects of CSR play in the enterprises of the Czech chemical companies, how deeply ethical behavior is implemented, who bears responsibility for ethical behavior, what are the ethical activities and reasons for changes of ethical behavior. Czech businesses globally hold a very low rung in terms of presentation of CSR disclosures. The paper is focused on chemical companies and their disclosure of ethical behavior. The results come from analyzing data published by the enterprises. Specifically, information on company's websites and published Codes of Ethics has been analyzed. The research was completed by information from personal interviews with executives responsible for ethics in the four selected companies. [ABSTRACT FROM AUTHOR]
- Published
- 2016
15. THE ASSESSMENT OF SOCIAL IMPACTS ALONG THE PRODUCT LIFE CYCLE IN VALUE CHAIN ACTORS NOT INCLUDING CONSUMERS AS A PART OF SOCIAL WELFARE IN THE COMPANIES.
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Bednarikova, Marie, Vavra, Jan, Munzarova, Simona, and Kohoutkova, Marketa
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PRODUCT life cycle ,SOCIAL impact ,SOCIAL services ,PUBLIC welfare - Abstract
Every company has to decide daily not only how many products should be produced and sold but it has to look at the circumstances of its activity. Companies should see a product life cycle in a complex way, as a certain cycle starting with a development of the product and finishing with its liquidation. During this cycle companies should take decisions in conformity with environmental, social and economical sphere. Social impacts can come into existence during all the product life cycle because of positive or negative effects on particular stakeholders. According to Social Life Cycle Assessment methodology social impacts are divided into categories on the basis of stakeholders and there is a certain number of indicators with help of which these impacts are determined defined for each category. The precise choice of individual indicators is very important in view of the number of potential social aspects that can be included in social assessment of a product life cycle. The article is focused on the selected stakeholders in value chain without final consumers in the Czech Republic. Attention paid to this area means an important contribution to social welfare in companies. This research was carried out in one production company and in two its big customers. The results of this research are summarized in our article. [ABSTRACT FROM AUTHOR]
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- 2016
16. REASONS FOR SOCIAL IMPACTS ASSESSMENT OF CHEMICAL PRODUCTION AND PRODUCTS.
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Vavra, Jan, Bednarikova, Marie, Munzarova, Simona, and Nesladkova, Tereza
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SOCIAL impact ,POLLUTANTS ,POLLUTION ,CHEMICALS ,STAKEHOLDER theory ,CHEMICAL products manufacturing - Abstract
From the point of view of the social impacts, chemical companies and chemicals are considered by a part of the society as something "artificial", unhealthy, and their production is, apart from the potential risk of an accident, accompanied by emissions of pollutants into the environment, but also by a number of effects giving odor or visually negative impression. The growing interest of the important stakeholders in the problems of social impacts of the produced chemicals, have brought a lot of questions concerning the importance of stakeholders from the perspective of social issues. The main objective of the contribution is to identify the main reasons / benefits of evaluation the social and socio-economic impacts of chemical products and production from the point of view of company as well as stakeholders. Based on theoretical basis concerning practices and specific circumstances in stakeholder theory and social impact assessment processes, a primary research was realized with managers of chemical companies through simple questionnaire. The most important findings related with identified the most important social impacts perceived by company are closer analysed and discussed. Based on identified social impacts was deduced the most frequently mentioned reasons for evaluating social and socio-economic impacts and social issues. Reasons for considering social impacts as an important element in decision-making process are still less known and underestimated and this contribution helps to improve understanding the importance of social impacts for the company and their relation to stakeholders. [ABSTRACT FROM AUTHOR]
- Published
- 2016
17. Assessment of Social Impacts of Chemical and Food Products in the Czech Republic.
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Vavra, Jan, Munzarova, Simona, and Bednarikova, Marie
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- 2015
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18. COST MANAGEMENT AND PRODUCT COSTING, EVIDENCE FROM THE PRACTICE OF A MEDIUM-SIZED BREWERY IN THE CZECH REPUBLIC.
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Munzarova, Simona, Vavra, Jan, Bednarikova, Marie, Vlckova, Vladimira, and Ritschelova, Adriana
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DECISION making ,PRODUCT costing ,ACCOUNTING ,COST allocation - Abstract
A product costing, if properly formed, belongs to the important cost management tools as its outputs play important role within management control and decision making processes. Changes in the market, that are a daily reality for today businesses, cause the changes in procedures and tools that management uses to manage its business operations. Also, as published many times, the management accounting systems together with procedures of the product costing doesn't remain unaffected. But what are the changes within managerial accounting system that have appeared in conditions of medium-sized company in the Czech Republic? The paper presents the results of the analysis of current state of the cost management and product costing process in the company. The analysis was carried out by the means of a primary qualitative research, using the methods of in-depth interviews with relevant managers supported by internal documents provided by the company. The general methods of analysis, comparison and synthesis were applied. The form of case study is used to present the results of the analysis. Attention was first drawn to description of the process of product costing in the company. Later, ways were identified to refine the system of product costing, focusing particularly on costs incurred within production process and on the possibilities of using modern methods of cost allocation. The research results are an important contribution to the development of cost allocation methods linked with the beer production. The paper brings evidence of current state of cost management and product costing process from the real conditions of the mediumsized brewery, whose product range has more than quadrupled in the last twenty years. A proposal on streamlining and refining the managerial accounting system, in the form of draft amendments, was performed with the use of a differentiated multistage approach to costs allocation on different products within the company product costing. [ABSTRACT FROM AUTHOR]
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- 2015
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19. SOCIAL IMPACTS OF CHEMICAL COMPANY ON LOCAL COMMUNITIES.
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Vavra, Jan, Bednarikova, Marie, Branska, Lenka, and Jirku, Petr
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SCIENTIFIC community ,COMMUNITY size ,CHEMICAL industry ,CLIMATE change ,STAKEHOLDERS - Abstract
Chemical companies can be considered as ones of the most important companies affecting changes in climatic conditions and other environmental elements, and they also show strong impacts on the society in the social context. The growing interest of the important stakeholders in the problems of social impacts of the produced items, have brought a lot of important questions concerning the rate of influence of the produced items on the environment and society. Social impacts assessment methods of chemical companies on the workers, the consumers, the local communities, the society and other shareholders are newly developed and improved. The main objective of the contribution is to compare perceived importance of social impacts by chemical company with perceived importance of social impacts by local communities surrounding chemical company. Based on theoretical basis concerning practices and specific circumstances in social impact assessment processes, a preliminary research was realized with managers of chemical company through structured one-to-one interviews. This preliminary research was supported by realized structured one-to-one interviews with representatives of local communities surrounding chemical company. The most important differences related with perception of social impacts by company and local communities are closer analyzed and discussed. The structured one-to-one interviews were used to identify different perception of the social impacts from the point of the chemical company compared with local community's views. Assessment of company's social impacts on local communities is still in the state of research and this contribution helps to improve understanding of importance of each individual social impact for the company and local communities as well. Local communities represent one of the most important stakeholders for chemical companies. The chemical companies are perceived as a potential danger not only for the closest neighborhood of the production plants, but also for the wider surroundings, therefore social impacts related with local communities must be adequately considered. For this reason quality of life for communities surrounding chemical companies must be systematically monitored and social impacts of chemical companies must be assessed along the whole product life cycle. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
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20. INDICATORS OF S-LCA IN EMPLOYEES CATEGORY, THEIR MEASUREMENT AND REPORTING IN THE COMPANY.
- Author
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Bednarikova, Marie, Munzarova, Simona, Vavra, Jan, Vlckova, Vladimira, and Buresova, Klara
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SUSTAINABLE development ,PRODUCT life cycle ,PRODUCT obsolescence ,SUPERVISION of employees ,CLINICAL supervision - Abstract
Discussions about a sustainable development provoked the initiative to focus to methods based on evaluation of environmental, social and economical production impacts. The interest in taking into consideration also the social point of view appears recently more and more often in connection with the environmental evaluation of any product life cycle. This way a motion to formation of the SLCA (Social Life Cycle Assessment) has been made. This paper describes the results of a research in some selected companies in the Czech Republic the subject of which was questioning about the knowledge of SLCA, measurement of social impacts indicators of production to employees and their use and reporting. Within the research it was examined how business identify, monitor and evaluate the social impacts of their activities on employees in the areas mentioned above. It was analysed why, and what are the indicators compiled these impacts, how their value is reflected in the management of business operations and human resources. Attention of the research has been also paid to social reporting system (both external and internal) as complex aggregation of information that is presented to company stakeholders that could, based on these reports, consider the social impacts of planned decisions. The research was carried out with a form of controlled talk to personnel officers and to staff of health and safety department. The goal of the paper is to bring interpretation of empirical evidence and to find among generally recommended indicators these that are suitable for the Czech companies and to find out whether and which way they are treated there. [ABSTRACT FROM AUTHOR]
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- 2015
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21. An evaluation of cyber threats to industrial control systems.
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Vavra, Jan and Hromada, Martin
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- 2015
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22. Electron probing of the oxygen evolving Ba0.5Sr0.5Co0.8Fe0.2O3-δ.
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Shen, Tzu-Hsien, Spillane, Liam, Vavra, Jan, and Tileli, Vasiliki
- Published
- 2021
- Full Text
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23. Electron probing of the oxygen evolving Ba0.5Sr0.5Co0.8Fe0.2O3-δ.
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Shen, Tzu-Hsien, Spillane, Liam, Vavra, Jan, and Tileli, Vasiliki
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- 2021
- Full Text
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24. The Sharing Economy in the Context of Sustainable Development and Social Responsibility: The Example of the Czech Republic.
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Jelinkova, Martina, Tetrevova, Libena, Vavra, Jan, and Munzarova, Simona
- Abstract
The rapid development of the sharing economy that has been registered in recent years is caused by a number of factors. The increasingly pronounced effort on the part of all economic entities to contribute towards sustainable development through the application of socially responsible behavior is deemed to be a key factor. The objective of the article is to analyze and evaluate the attitudes of customers towards the benefits of the sharing economy in the field of economic, social, and environmental responsibility using the example of a small post-communist economy—the Czech Republic. Primary data were obtained on the basis of a questionnaire survey. This was elaborated using descriptive and inferential statistics tools. The study that was performed shows that the majority of customers regard sharing as a source of benefits in the field of economic, social, and environmental responsibility, whereas in a complex sense, they perceive these benefits to be equal. Women perceive the investigated benefits of sharing with regard to environmental responsibility as more important compared to men. In comparison with the older generation, the younger generation perceives selected benefits of sharing as more important in all three investigated areas of responsibility. People with a higher education perceive selected benefits of sharing with regard to economic responsibility as more important compared to people with a lower level of education. The article provides original insights into the perception of the benefits of sharing for sustainable development by actors in the sharing economy and is a source of knowledge about their motivations for both policymakers and managers of companies involved in the sharing economy. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
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25. Communication of Socially-Responsible Activities by Higher Education Institutions.
- Author
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Tetrevova, Libena, Vavra, Jan, and Munzarova, Simona
- Abstract
Higher education institutions play a fundamental role in the scientific, economic, social, and cultural development of each and every society. In view of new challenges such as the COVID-19 pandemic, the importance of their social responsibility and ability to effectively communicate the socially–responsible activities which are performed is growing. The aim of this article is to analyze and evaluate the scope and structure of socially-responsible activities communicated on the websites of public higher education institutions operating in a small post-communist country where education plays a traditional role—the Czech Republic, and to formulate recommendations for improvement of the level of communication of social responsibility by higher education institutions. Primary data was obtained using latent analysis of the content of the websites of all public higher education institutions operating in the Czech Republic. The CE3SPA method was applied. The survey which was performed shows that the level of communication of social responsibility by higher education institutions in the Czech Republic is low. Activities in the field of economic and social responsibility are communicated in the greatest scope. On the contrary, activities in the field of environmental responsibility are communicated the least. Public higher education institutions in the Czech Republic should therefore apply the measures proposed in the article, these also being transferrable to practice in other countries. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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26. Long‐Term Imaging: Supported Lipid Bilayers on Fluorescent Nanodiamonds: A Structurally Defined and Versatile Coating for Bioapplications (Adv. Funct. Mater. 45/2018).
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Vavra, Jan, Rehor, Ivan, Rendler, Torsten, Jani, Mona, Bednar, Jan, Baksh, Michael M., Zappe, Andrea, Wrachtrup, Joerg, and Cigler, Petr
- Subjects
NANODIAMONDS ,MAGNETIC fields ,ELECTRIC fields ,BILAYER lipid membranes ,BIOMIMETIC chemicals - Abstract
Fluorescent nanodiamonds (FNDs) with nitrogen‐vacancy centers enable optical readout of local changes in electric and magnetic fields. In article 1803406, Petr Cigler and co‐workers report biomimetic architectures on FNDs based on supported lipid bilayers. They function as "molecular modular bricks", tailoring the interface of particles for specific applications and transducing the changes in local environment to nitrogen‐vacancy centers with remarkable sensitivity. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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27. Supported Lipid Bilayers on Fluorescent Nanodiamonds: A Structurally Defined and Versatile Coating for Bioapplications.
- Author
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Vavra, Jan, Rehor, Ivan, Rendler, Torsten, Jani, Mona, Bednar, Jan, Baksh, Michael M., Zappe, Andrea, Wrachtrup, Joerg, and Cigler, Petr
- Subjects
NANODIAMONDS ,BILAYER lipid membranes ,MAGNETIC fields ,FLUORESCENCE ,PHOSPHOLIPIDS - Abstract
Fluorescent nanodiamonds with nitrogen‐vacancy (NV) centers respond to local changes in electric and magnetic fields. These responses can be read optically as changes in fluorescence. NV centers do not suffer from photoblinking or photobleaching, making nanodiamonds a viable platform for long‐term imaging of processes inside living cells. However, for any bioapplication, the surface of these particles must be modified to prevent aggregation and nonspecific protein adsorption and to effectively transduce the changes in local environment to NV center. Modular biomimetic interface has been developed on nanodiamonds with remarkable sensitivity for relaxometric readout that takes advantage of self‐assembled phospholipid bilayers supported by the nanoparticle surface. This rapid and robust approach provides synthetic pathway to tunable composition, demonstrated by tuning surface charge and content of spin labels on nanodiamond. The supported phospholipid bilayer interface increases the detection sensitivity about one‐order‐of‐magnitude. Also, a theoretical model of the system is provided, which shows excellent agreement with experimental results. Merging biocompatibility, modularity, and outstanding spin sensitivity in one nanomaterial provides a foundation for development of multifunctional nanoparticles suitable for highly sensitive monitoring of local magnetic field fluctuations and paramagnetic species under physiological conditions. Nanodiamond coated with supported lipid bilayers is a new composite nanomaterial with biocompatible interface. It is highly modular in composition and surface charge and shows outstanding spin sensitivity of nitrogen‐vacancy centers toward local magnetic field fluctuations. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
28. Anchored but not internalized: shape dependent endocytosis of nanodiamond.
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Zhang, Bokai, Feng, Xi, Yin, Hang, Ge, Zhenpeng, Wang, Yanhuan, Chu, Zhiqin, Raabova, Helena, Vavra, Jan, Cigler, Petr, Liu, Renbao, Wang, Yi, and Li, Quan
- Abstract
Nanoparticle-cell interactions begin with the cellular uptake of the nanoparticles, a process that eventually determines their cellular fate. In the present work, we show that the morphological features of nanodiamonds (NDs) affect both the anchoring and internalization stages of their endocytosis. While a prickly ND (with sharp edges/corners) has no trouble of anchoring onto the plasma membrane, it suffers from difficult internalization afterwards. In comparison, the internalization of a round ND (obtained by selective etching of the prickly ND) is not limited by its lower anchoring amount and presents a much higher endocytosis amount. Molecular dynamics simulation and continuum modelling results suggest that the observed difference in the anchoring of round and prickly NDs likely results from the reduced contact surface area with the cell membrane of the former, while the energy penalty associated with membrane curvature generation, which is lower for a round ND, may explain its higher probability of the subsequent internalization. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
29. ChemInform Abstract: Synthesis of Helquats Based on Phenanthridinium Units: Four-Step Procedure to Novel Extended Helical Dications.
- Author
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Sonawane, Manoj R., Vavra, Jan, Saman, David, Cisarova, Ivana, and Teply, Filip
- Published
- 2016
- Full Text
- View/download PDF
30. ChemInform Abstract: Bio- and Air-Tolerant Carbon-Carbon Bond Formations via Organometallic Ruthenium Catalysis.
- Author
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Adriaenssens, Louis, Severa, Lukas, Vavra, Jan, Salova, Tereza, Hyvl, Jakub, Cizkova, Martina, Pohl, Radek, Saman, David, and Teply, Filip
- Published
- 2010
- Full Text
- View/download PDF
31. ChemInform Abstract: Air-Tolerant C-C Bond Formation via Organometallic Ruthenium Catalysis: Diverse Catalytic Pathways Involving (C5Me5)Ru or (C5H5)Ru Are Robust to Molecular Oxygen.
- Author
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Severa, Lukas, Vavra, Jan, Kohoutova, Anna, Cizkova, Martina, Salova, Tereza, Hyvl, Jakub, Saman, David, Pohl, Radek, Adriaenssens, Louis, and Teply, Filip
- Published
- 2009
- Full Text
- View/download PDF
32. ChemInform Abstract: Air-Tolerant C-C Bond Formation via Organometallic Ruthenium Catalysis: Diverse Catalytic Pathways Involving (C5Me5)Ru or (C5H5)Ru Are Robust to Molecular Oxygen.
- Author
-
Severa, Lukas, Vavra, Jan, Kohoutova, Anna, Cizkova, Martina, Salova, Tereza, Hyvl, Jakub, Saman, David, Pohl, Radek, Adriaenssens, Louis, and Teply, Filip
- Published
- 2009
- Full Text
- View/download PDF
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