Academic literature on the topic 'Eco-functional value'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Eco-functional value.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Eco-functional value"
1
Shin, Eunjung, and Ae-Ran Koh. "A Study on the Changes in Consumer Perceptions of the Relationship between Ethical Consumption and Consumption Value: Focusing on Analyzing Ethical Consumption and Consumption Value Keyword Changes Using Big Data." Family and Environment Research 59, no. 2 (2021): 245–59. http://dx.doi.org/10.6115/fer.2021.018.
Full textAbstract:
The purpose of this study was to analyze big data to identify the sub-dimensions of ethical consumption, as well as the consumption value associated with ethical consumption that changes over time. For this study, data were collected from Naver and Daum using the keyword ‘ethical consumption’ and frequency and matrix data were extracted through Textom, for the period January 1, 2016, to December 31, 2018. In addition, a twoway mode network analysis was conducted using the UCINET 6.0 program and visualized using the NetDraw function. The results of text mining show increasing keyword frequency year-on-year, indicating that interest in ethical consumption has grown. The sub-dimensions derived for 2014 and 2015 are fair trade, ethical consumption, eco-friendly products, and cooperatives and for 2016 are fair trade, ethical consumption, eco-friendly products and animal welfare. The results of deriving consumption value keywords were classified as emotional value, social value, functional value and conditional value. The influence of functional value was found to be growing over time. Through network analysis, the relationship between the sub-dimensions of ethical consumption and consumption values derived each year from 2014 to 2018 showed a significantly strong correlation between eco-friendly product consumption and emotional value, social value, functional value and conditional value.
2
Köse, Sirin G. "Using theory of consumption values to predict organic food purchase intention: Role of health consciousness and eco-friendly LOHAS tendency." Spanish Journal of Agricultural Research 19, no. 3 (2021): e0109-e0109. http://dx.doi.org/10.5424/sjar/2021193-16640.
Full textAbstract:
Aim of study: The objective of this study was to investigate the relationship between eco-friendly LOHAS (Lifestyle of Health and Sustainability) tendency, health consciousness, perceived value of organic food and organic food purchase intention in the framework of personality-perception-behavioral intention. Area of study: Turkey. Material and methods: Data were collected from consumers using structured questionnaires. The research model was analyzed with the Partial Least Square Structural Equation Modeling technique. Main results: Results show that eco-friendly LOHAS tendency (β= 0.292, p<0.01), health consciousness (β=0.140, p<0, 05), emotional value (β=0.282, p<0.01), and social value (β=0.099, p<0.05) positively influence intention to purchase organic food, whereas financial value and functional value were not significantly related to intention to purchase organic food. Furthermore, eco-friendly LOHAS tendency and health consciousness are positively related to all dimensions of perceived value of organic food. Research highlights: Findings point out that affective dimension of perceived value of organic food is more considerable than cognitive dimension in a developing country. Emotional value of organic food is more important for consumers who have high level of eco-friendly LOHAS tendency while functional value of organic food is more essential for consumers who a have high level of health consciousness.
3
Passaro, J., A. Bifulco, L. Guadagno, A. Aronne, F. Cimino, and P. Russo. "Eco-friendly composites with specific functional properties." Journal of Physics: Conference Series 2716, no. 1 (2024): 012042. http://dx.doi.org/10.1088/1742-6596/2716/1/012042.
Full textAbstract:
Abstract The development of sustainable hydrophobic composite coatings is of high interest for aircraft applications. Currently, the use of natural derived functionalized microparticles as filler to obtain hydrophobic epoxy-based coatings was not deeply investigated. In this scenario, a novel hydrophobic epoxy-based composite including waste hemp microparticles functionalized with silica layer, 3-aminopropyltriethoxysilane, polypropylene-graft-maleic anhydride and silanes (hexadecyltrimethoxysilane and 1H,1H,2H,2H- Perfluorocotyltriethoxysilane) is presented. The resulting coating was casted on typical aeronautical panel, based on carbon-fiber-reinforced polymers, to achieve an improved hydrophobicity and anti-icing property induced by functionalized hemp microparticles. The wettability and anti-icing property were investigated. Compared to unfilled epoxy resin, the obtained composite coating achieved a greater water contact angle of 30° and doubled increase in icing time. Despite the low content (2 wt.%) of hemp particles, DSC analysis displayed a relevant increase in Tg value, confirming an efficient interaction between the epoxy matrix and the functionalized hemp filler. AFM analysis proved how the presence of hemp filler leads to an increase in roughness due to the hierarchical structure formed by the long chains of silane molecules. The combination of silane activity and rough morphology allows the development of hemp composite coatings with enhanced hydrophobicity, anti-icing behavior and thermal stability for aircraft applications.
4
Rosli, Noor Afizah, Wan Hafizi Wan Ishak, and Ishak Ahmad. "Eco-friendly high-density polyethylene/amorphous cellulose composites: Environmental and functional value." Journal of Cleaner Production 290 (March 2021): 125886. http://dx.doi.org/10.1016/j.jclepro.2021.125886.
Full text
5
Kim, Geon-Whee. "The Effects of Eco-Friendly Food Consumption Value Using S-O-R Framework on Consumer Satisfaction and Repurchase Intention: Focus on the moderating effect of Product Familiarity." Foodservice Management Society of Korea 26, no. 5 (2023): 187–210. http://dx.doi.org/10.47584/jfm.2023.26.5.187.
Full textAbstract:
This study was examine the effect of S-O-R framework to confirm how eco-friendly food consumption value affects consumer satisfaction and how consumer satisfaction affects repurchase intention. In addition, The moderating effect of product familiarity between consumer satisfaction and repurchase intention was verified. The results of this study are as follows. First, as a result of verifying the degree of influence of eco-friendly food consumption value factors on consumer satisfaction, it was found that functional value and emotional value had a significant effect on consumer attitude. Second, as a result of verifying the degree of influence of consumers' satisfaction purchasing eco-friendly food on repurchase intention, it was found that consumer satisfaction has a significant effect on repurchase intention. Third, as a result of verifying the moderating effect of product familiarity and consumer satisfaction purchasing eco-friendly food on repurchase intention, both objective familiarity and subjective familiarity had a moderating effect between consumer satisfaction and repurchase intention when purchasing eco-friendly food
6
Kang, Moon Sil, and Yoon Sook Kim. "The Moderating Effects of Environmental Interest between Consumption Value and Eco-friendly Purchasing Behavior." Academic Society of Global Business Administration 20, no. 5 (2023): 25–50. http://dx.doi.org/10.38115/asgba.2023.20.5.25.
Full textAbstract:
This study explores the importance for businesses to provide valuable products by considering environmental and consumer behavior trends in the production and sales processes. The utility of such value is entirely judged by consumers who intend to make a purchase. As consumer preferences and individuality continue to diversify, it is crucial for businesses to understand consumption values. Therefore, this study was conducted to find out consumption values and to find out adjustment effect of environmental interest in the structural relationship between consumption values and eco-friendly purchasing behaviors. The study was conducted for consumers residing in Jeju area and the obtained data was analyzed.
 The results of the study showed that, first, social values, functional values, and eco-friendly values, which are sub-factors of consumption values, gave positive (+) effects to eco-friendly purchasing behaviors. Second, the environmental interest gave partial effects in the relationship between consumption values and eco-friendly purchasing behaviors. The academic implication was that how the adjustment effect of environmental interest acted in consumption values and eco-friendly purchasing behaviors in case of eco-friendly products. Practical implication suggests that we should pay attention in how much influences are given by environmental interest as consumption value promotion factors.
7
Kumalasari, Heny, Mohammad Irhas Effendi, and Wisnalmawati Wisnalmawati. "PENGARUH NILAI FUNSIONAL DAN NILAI LINGKUNGAN TERHADAP MINAT PEMBELIAN ECO-FASHION DIMEDIASI OLEH SIKAP KONSUMEN." Jurnal Muhammadiyah Manajemen Bisnis 5, no. 1 (2024): 49. http://dx.doi.org/10.24853/jmmb.5.1.49-62.
Full textAbstract:
ABSTRACTThe development of clothing fashion encourages long-term environmental protection. The aim of this research is to analyze buying interest in eco-fashion products. The variables used in this research are functional value and environmental value as independent variables, consumer attitudes as intervening variables and bell interest as the dependent variable. The method used is quantitative, hypothesis testing using SEM-PLS analysis. The sample used was 100 consumers. The research results show that functional value and environmental value have a significant effect on purchasing interest in eco-fashion products, and consumer attitudes as mediating variables. Consumer attitudes are the novelty of this research. Peelitianni contributed theoretically and practicallyFunctional value, environmental value, consumer attitudes, purchase intentionABSTRAKPerkembangan Fashion pakaian mendorong perlidunganlingkungan dalam jangka Panjang. Tujuan menelitian ini yaitu untuk menganalisis minat beli tentang produk eco- fashion. Variable yang digunakan dalam penelitian ini yaiu nilai fungsional dan nilai lingkungan sebagai variable independent, sikap konsumen sebagai variable intervening dan minat bel sebagai variable dependen. Metode yang digunakan yaitu kuantitatif, pengujian hipotesis dengan analisis SEM-PLS. Sampel yang digunakan sebanyak 100.konsumen. hasil penelitian menunjukkan nilai fungsional dan nilai lingkungan berpengaruh signifikan terhadan minat pembelian produk eco-fashion, dan sikap konsumen sebakatvariabel mediasi. Sikap konsumen sebagai kebaruan penelitian ini. Peelitianni berkontibusi secara teoritis dan praktis.Nilai fungsional, nilai lingkungan, sikap konsumen, Minat pembelian
8
Nafiati, Lu'lu', Tri Wahyuni Sukesi, Herman Yuliansyah, et al. "The Effect of Green Perceived Values and Injunctive Norms on Buying Intentions of Eco-Friendly Products." Jurnal REKSA: Rekayasa Keuangan, Syariah dan Audit 11, no. 1 (2024): 15–28. http://dx.doi.org/10.12928/jreksa.v11i1.10240.
Full textAbstract:
This study aims to utilize the multidimensional concept of green perceived value (GPV) and injunctive norms in relation to the intention to buy environmentally friendly products. This research utilized 105 questionnaires to investigate the correlation between GPV, injunctive norms, attitudes toward purchasing, and purchase intention by focusing on four components of GPV: functional value, conditional value, social value, and emotional value. Structural equation models were employed to assess the connections among the seven components. This study adds to the existing literature by exploring the nuanced relationship between green perceived value (GPV), injunctive norms, attitudes toward purchasing, and intention to buy environmentally friendly products. By focusing on four dimensions of GPV - functional value, conditional value, social value, and emotional value - the research sheds light on how these components influence consumer behavior. Using structural equation models and analysis of 105 questionnaires, the study reveals that functional and emotional values significantly impact purchase intention via attitudes toward purchasing. These findings contribute to a deeper understanding of consumer behavior and provide insights for promoting and developing eco-friendly products. This study aims to enhance comprehension of consumer behavior and the development of intentions to buy eco-friendly products.
9
Bai, Yuan, Hailiang Xu, and Hongbo Ling. "Eco-service value evaluation based on eco-economic functional regionalization in a typical basin of northwest arid area, China." Environmental Earth Sciences 71, no. 8 (2013): 3715–26. http://dx.doi.org/10.1007/s12665-013-2766-4.
Full text
10
Qalase, Chule, and Kevin G. Harding. "Eco-efficiency assessment of pork production through life-cycle assessment and product system value in South Africa." E3S Web of Conferences 349 (2022): 13002. http://dx.doi.org/10.1051/e3sconf/202234913002.
Full textAbstract:
The consumption of pork as a source of animal protein has increased worldwide, especially in developing countries such as South Africa. The increase in pork demand is putting pressure on the natural environment, and the costs of production are increasing. This study sought to determine what is the eco-efficiency of pork production in a South African context. It also was meant to determine which processes in the value chain have low eco-efficiencies. Lastly, it sought to find what strategies could be recommended to improve overall eco-efficiency. Eco-efficiency was assessed by following the requirements of the International Standards Organisation ISO 14045 standard, which requires that the Life cycle assessment (LCA) method and product system value be combined. The environmental life cycle costing (LCC) method was used to determine the product system value (Value Added) of pork production. The functional unit was 1 kg of pork carcass, specifically from the cradle to the abattoir gate. The findings indicated that the pig farm and abattoir were the processes that had low eco-efficiencies and eco-efficient strategic improvements could be made. Mitigation strategies could be developed to concentrate on the production of animal feed and the use of renewable energy sources at the abattoir. The use of water could be improved by automation of the abattoir processes. Therefore, this study achieved its goal as economic and environmental areas of interest were identified in this specific case study for South Africa. This framework could be extended to study the eco-efficiency of other meat production chains and other sectors.
Dissertations / Theses on the topic "Eco-functional value"
1
González, Ocón Santiago. "Evaluation of Potentially Eco-Efficient Solutions: Functional Sales and Industrial Ecology." Thesis, Linköping University, Environmental Technique and Management, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-53735.
Full textAbstract:
<p>Design of products permits to yield goods and services to produce satisfaction on customers, which is measured as value. However, it is at this stage in which most of the environmental impact, from a lifecycle perspective, is added to the product. Eco-design aims at increasing value of products while reducing the burdens on the environment by means conscious design towards efficient use of resources. That efficiency, referred to as eco-efficiency, can be increased in a number of manners within environmental engineering. Traditionally, different fields have tackled materials, energy flows and products from different angles or approaches. In this thesis we describe Functional Sales (FS) and Industrial Ecology (IE) as examples of these. Within this latter, we put emphasis on Industrial Symbiosis (IS) and Eco-effectiveness. We consider these approaches are suitable to work in the framework of eco-design to increase ecoefficiency. By adding services to material products, and managing material and energy flows with a more ecological consciousness, we expect to increase value of products while reducing the impact on the environment.</p><p>To analyse this potential improvement, we developed a method involving a new eco-efficiency index (VERI), that recursively intends to ease decisions on possible eco-efficient alternatives. This index and its method are applied to a case study on management of olive oil supply in region of Murcia, Spain. Here, we propose three scenarios that will involve the implementation of FS and IE to compare the outcomes in value and environmental performance against an idealised current supply chain. The results obtained, although not accurate, suggest that FS and EI should be more taken into account in eco-design and, this latter, to also consider holistic viewpoints to find more eco-efficient alternatives for a product development.</p>
2
Diedericks, Lizette. "The influence of brand incongruity on females’ perception of the properties of bi-national apparel products." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/41107.
Full textAbstract:
This study investigated the influence of brand incongruity on females’ perception of the properties of bi-national apparel products. A survey was conducted across Tshwane, a major urban area in South Africa, to provide empirical evidence of female consumers’ reliance on brands in the context of an emerging economy where global brands have become widely available and easily accessible in recent years. Data was collected by means of convenient sampling and through self completion of a structured questionnaire by 322 willing, working females. Data analysis involved descriptive statistics, factor analysis, ANOVAs and post hoc tests.
This study confirmed the significance of brand names as a cue of the functional performance related properties of female apparel and concluded that the relevance of brands for status related purposes is secondary to females’ use of brands to infer the functional and performance attributes or to deduce the eco friendliness of apparel. This was true for all the age, income, and education levels or population categories. Although extant research confirms the importance of brands to convey status and to boost consumers’ self image, i.e. serving as an extension of an individual’s self, this study revealed that females do not primarily use brands for status purposes. Brands are mostly trusted to provide good fit, durability, comfort and good quality. Consumers do not necessarily seem familiar with the majority of apparel brands that are widely advertised. However, the majority of consumers preferred the country of manufacture (COM) and the country of origin (COO) of brands to match. Overall, they preferred brands originating from Western countries as the COM, and were more approving of locally manufactured goods than apparel manufactured in Eastern countries. As a simplifying strategy, consumers’ ignorance about the COM of global brands is probably addressed by opting for brands associated with Western COM. Brand incongruence may therefore have noticeable consequences for brand equity in a highly competitive global market and this should be addressed through clever marketing initiatives to prevent dismay and brand switching.<br>Dissertation (MConsumer Science)--University of Pretoria, 2013.<br>gm2014<br>Consumer Science<br>unrestricted
Book chapters on the topic "Eco-functional value"
1
Jonker, Jan, and Niels Faber. "Strategy." In Organizing for Sustainability. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-78157-6_8.
Full textAbstract:
AbstractIn this chapter, we explore the nature of strategy. We have touched upon the subject in earlier chapters but here we present a typology of strategies. We define strategy as a route consisting of a set of deliberate actions leading to realizing your sustainable value proposition. Strategy can be approached as a plan or a process. Six strategies are distinguished: (1) eco-efficiency, (2) product as a service, (3) use optimization, (4) lifespan extension, (5) cascading, and (6) community building. Each of these strategies can be used as a stand-alone strategy or in a balanced combination while developing one of the business model archetypes. Which of these strategies or combinations you choose depends on the specific circumstances and stakeholders involved and the context in which you are seeking to realize your business model, as well as the underlying value proposition. A functional strategy is fundamentally a matter of clear, reasoned and actionable choices.
2
Kuntzky, Katrin, and Christoph Herrmann. "Application of Eco-Services in Automotive Industry for Commercial Customers." In Functional Thinking for Value Creation. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19689-8_49.
Full text
3
Chen, Jahau Lewis, and Shih-Che Huang. "Eco-Innovative Design of Product Service Systems by using the Substance-Field Analysis Method." In Functional Thinking for Value Creation. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19689-8_13.
Full text
4
Ceschin, Fabrizio, Carlo Vezzoli, and Philip J. Vergragt. "Small Scale Socio-Technical Experiments as Stepping Stones for Eco-Efficient Product-Service Systems Diffusion: a New Role for Strategic Design for Sustainability." In Functional Thinking for Value Creation. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19689-8_21.
Full text
5
Korasapati, Ravichandra, Suresh Babu Basthipati, Khawlhring Rosangzuala, et al. "Value Added Products Generation from Sugarcane Bagasse and Its Impact on Economizing Biorefinery and Sustainability of Sugarcane Industry." In Sugarcane - Its Products and Sustainability. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.107472.
Full textAbstract:
Augmenting value-added products generation with the biorefinery process of sugar cane by utilizing the by-products helps to achieve a more sustainable model of the sugarcane industry and in turn, contributes to the circular economy. Among the value-added products produced from sugarcane waste, functional foods offer additional health benefits besides their nutritional and calorific value. In recent years non-digestible sugars gained interest as potential prebiotic functional foods which benefit the host without increasing calorific value. These sugars are produced by the breakdown of carbohydrate polymers like cellulose and xylan, by thermochemical treatment or by enzymatic hydrolysis, or a combination of both. Sugar cane bagasse (SB) is an economical source of xylan which can serve as the substrate for xylooligosaccharides (XOS), xylobiose, xylitol, and ethanol. Cellulases, xylanases, and ligninases have wide applications in food processing, agro-fiber, pharmaceutical, and the paper and pulp industries including nutraceuticals production, where these enzymes provide eco-friendly alternatives to some chemical processes and help to reduce environmental impact. Conventional thermochemical methods for nutraceuticals production require chemicals that result in the release of toxic byproducts thus requiring additional steps for refining. In this context, the sustainable and eco-friendly processes for the production of nutraceuticals require employing biocatalysts like microbial enzymes or microbes as a whole, where in addition to averting the toxic byproducts the refining process requires lesser steps. The present chapter discusses the current research and challenges in the production of value-added products from sugarcane byproducts and their contribution to the sustainability of the sugarcane industry.
6
Ryshchenko, Tatyana, and Alfeddi Haula. "ARCHITECTURAL METHODS OF FORMING MODERN ECO-ORIENTED BUSINESS BUILDINGS." In Innovations in science: current research and advanced technologies. Publishing House “Baltija Publishing”, 2025. https://doi.org/10.30525/978-9934-26-531-0-14.
Full textAbstract:
Modern business buildings stimulate the development of urban infrastructure and contribute to increasing the economic attractiveness of the region. Such centers influence the development of related services, which makes them important elements of the urban economy. Therefore, there is a need for research developments that would systematize existing experience and offer new approaches to their architectural formation. The purpose of the paper is to develop recommendations for improving the architectural design of eco-oriented business buildings. Methodology of the study is based on general research methods of factorial analysis and synthesis, induction and deduction, observation and abstraction, which are used to systematise achievements in the theory and practice of designing eco-oriented business buildings. Results of the survey showed that designing eco-oriented business buildings is quite relevant in the modern urban environment. The trends in the architectural formation of modern eco-oriented business buildings have been identified. The factors influencing the architectural formation of modern eco-oriented business buildings have been identified. The typology and features of the functional and planning structure of eco-oriented business buildings have been identified. The specifics of the formation of design spaces of eco-oriented business buildings have been identified. The techniques and principles of architectural design of modern eco-oriented business buildings have been identified. Practical implications. The creation of a modern architectural solution for eco-oriented business buildings is not only one of the means of reflecting and ensuring their clear functional zoning, ergonomic content and compliance with current building standards, but also an objective criterion for the formation of an individual artistic image of the object. Value / originality. The modern trend in equipping eco-oriented design spaces of business buildings is the introduction into their structure of architectural and landscape components (greening, water devices, geoplastic elements), which are of great importance for creating comfort and giving a unique individual look to the environment. The use of borrowing techniques, transformation of interior space, light and color plastics contribute to the design of modern eco-oriented business buildings. Design principles, which include flexibility of planning, adaptability to changing conditions and orientation to the comfort and aesthetics of eco-oriented business buildings, indicate the growing importance of innovative solutions, adaptation to global trends and the needs of modern users, which will ensure their efficiency and attractiveness in the future.
7
Arshad, M., M. Zubair, and A. Ullah. "A Green Biorefinery Concept: Proteins and Lipids as Sustainable Biomass." In Functional Materials from Lipids and Proteins. Royal Society of Chemistry, 2024. http://dx.doi.org/10.1039/9781839167980-00384.
Full textAbstract:
Biorefinery is a concept derived from the traditional oil refinery, which enables the production of bio-based materials without generating waste. Basically, this idea aligns with the concept of sustainable development, where every part of the biomass is processed into high-value-added materials via multiple unit operations in an economical and eco-friendly way. Proteins and lipids are unique sustainable bioresources containing a wide range of functional groups, i.e., amino acids in proteins. In contrast, esters, alcohols, and unsaturated bonds in lipids enable the production of numerous bio-derived materials using biorefinery concepts for applications in cosmetic, packaging, pharmaceutical, lubricant, biofuel, agriculture, food, and health industries. This chapter provides a successful biorefinery concept, involving the extraction of proteins and lipids and exploring their various potential applications.
8
Preda, Nicoleta, Marcela Socol, Andreea Costas, and Irina Zgura. "Bioinspired Fibrous Architectures Based on ZnO Templated by Eggshell Membranes." In Zinc Oxide Nanoparticles - Fundamentals and Applications [Working Title]. IntechOpen, 2024. http://dx.doi.org/10.5772/intechopen.1005214.
Full textAbstract:
ZnO-based nanostructures emerge as promising materials due to their potential applications in fields including electronic devices, photodetectors, photocatalysts, biocides, etc. The bio-template-mediated synthesis is a straightforward approach for obtaining inorganic or hybrid organic/inorganic materials with tailored morphologies and functional properties. Eco-friendly waste, eggshell membrane (ESM) is an ideal bio-template for the development of 3D hierarchical porous architectures due to its specific 3D interlaced fiber protein network structure. Therefore, this chapter is focused on the ESM-mediated synthesis of 3D fibrous architectures based on ZnO, the ESM organic network being functionalized with inorganic nanostructures or replicated into an inorganic one as follows: i) coated with ZnO layer by RF magnetron sputtering, (ii) covered with ZnO by electroless deposition and (iii) replicated into ZnO web by biomorphic mineralization. The obtained ZnO shows wurtzite structure, band-gap value and emission bands typical for this semiconductor. The electrical properties of the ZnO fiber webs were measured using interdigitated metallic electrodes patterned substrates. The ESM conversion from a bio-waste into new value-added nanomaterials is very attractive from the sustainability and recycle waste perspective, the ZnO-based fibrous architectures featured by a large specific surface area having potential applications in water purification, photocatalysis or chemical sensors areas.
9
Shanmugavelu, Vimal Kumar, Sruthi Harihara Jaya Subramanian, and Agasa Ramu Mahesh. "NOVEL TECHNOLOGIES FOR EXTRACTING AND ANALYZING BIOACTIVE COMPOUNDS FROM FRUIT WASTE." In Futuristic Trends in Pharmacy & Nursing Volume 3 Book 5. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bapn5ch32.
Full textAbstract:
Fruit waste is a treasure trove of bioactive compounds, including polyphenols, polysaccharides, and a diverse array of phytochemicals, including pigments. Beyond its environmental implications, harnessing the value of fruit waste presents promising economic opportunities, paving the way for innovative food products and ingredients that contribute to a circular economy. Organic phenolic compounds, in particular, have garnered significant attention in various industries, serving not only as nutritional supplements and functional foods but also as sustainable commodities. While numerous methods for extracting phenolic compounds from fruit waste exist, many rely on organic solvents, which can raise ecological concerns. There is a growing demand for eco-friendly and sustainable extraction techniques that yield phenolic-rich extracts with minimal environmental impact. The adoption of these innovative "green" extraction methods not only addresses the global fruit waste crisis but also converts fruit residue into valuable bio-based materials. In this comprehensive review, we delve into the most promising and inventive methods for isolating bioactive substances from fruit waste. Our focus is on environmentally friendly technologies, including bioreactors, enzyme-assisted extraction, ultrasound-assisted extraction, and their combinations, which offer sustainable solutions for both industry and the environment
10
Beselly, S. M., M. van Der Wegen, and D. Roelvink. "Mangrove–eco-geomorphic interactions modelling for nature-based solutions." In Nature-Based Solutions for Urban Sustainability. IWA Publishing, 2025. https://doi.org/10.2166/9781789065015_0191.
Full textAbstract:
Abstract Mangrove ecosystems are widely recognized for having highly valued multiple ecosystem services. These services, however, are often overlooked because of the lack of understanding of mangrove's species-specific and associated eco-geomorphological dynamics. Therefore, it will lead to a limited quantification and valuation of mangrove's functional and structural attributes. A mangrove ecosystem model capable of mechanistically simulating the feedback loop between mangrove stands and physical–environmental drivers is essentially important, specifically in the strategy of integrating mangroves as nature-based solutions for climate change adaptation and mitigation. The main objectives of this chapter are to gain a better insight into complex mangrove ecosystem and eco-geomorphic interactions to predict their trajectories, the possibility of modelling those utilizing a process-based model, and explore the interactions of mangrove, mudflat, and physical–environmental drivers. Following that, this chapter introduces a new hybrid model, so-called DFMFON, achieved by coupling mangrove individual-based and landscape-scale hydro-morphodynamic models which is capable of reproducing mangrove forest dynamics and morphodynamic delta features. To conclude, the application, limitations, and future development of process-based mangrove modelling for nature-based solutions are discussed.
Conference papers on the topic "Eco-functional value"
1
Yıldız, Dilay, Duygu Benzer Gürel, Özlem Çağındı, and Semra Kayaardı. "Investigation of Waste Grape Pulp for Healthy, Functional Beverage Production." In 7th International Students Science Congress. Izmir International guest Students Association, 2023. http://dx.doi.org/10.52460/issc.2023.021.
Full textAbstract:
Turkey, where different ecologies coexist, has great potential in fruit and vegetable production. Turkey, which has suitable climate and soil conditions, offers wide opportunities, especially in the field of viticulture and is an important center in the world with its rich grape gene potential. Grapes, which are rich in bioactive components, have an important place in the country's economy and social life for reasons such as providing raw materials to the food industry sector, creating employment opportunities, and having a high export potential, as well as being a valuable nutrient. Nowadays, with the developing understanding of conscious nutrition, the demand for fruit juice and similar products is gradually increasing as consumers turn towards natural and health-beneficial products. The grape, rich in various organic acids, vitamins and minerals and bioactive compounds with natural antioxidant properties has taken its place in the food industry for different purposes. Grape juice, must, molasses and grape pulp produced after wine production is an important food waste. The grape pulp contains 10%-30% of the crushed grape mass and other value-added components such as unfermented sugars, polyphenols, colors, alcohol, and tannins. These compounds should be recovered using acceptable, eco-friendly techniques without compromising the stability or quality of the product. The recovery of useful substances from food waste is a new development in the food industry. Thus, it is achieved to obtain high value-added products. This study, it was aimed to investigate the production of a new functional beverage with high phenolic content by drying the waste grape pulp formed after pressing purple grapes.
2
Yıldız, Dilay, Duygu Benzer Gürel, Özlem Çağındı, and Semra Kayaardı. "Investigation of Waste Grape Pulp for Healthy, Functional Beverage Production." In 7th International Students Science Congress. Izmir International guest Students Association, 2023. http://dx.doi.org/10.52460/issc.2023.021.
Full textAbstract:
Turkey, where different ecologies coexist, has great potential in fruit and vegetable production. Turkey, which has suitable climate and soil conditions, offers wide opportunities, especially in the field of viticulture and is an important center in the world with its rich grape gene potential. Grapes, which are rich in bioactive components, have an important place in the country's economy and social life for reasons such as providing raw materials to the food industry sector, creating employment opportunities, and having a high export potential, as well as being a valuable nutrient. Nowadays, with the developing understanding of conscious nutrition, the demand for fruit juice and similar products is gradually increasing as consumers turn towards natural and health-beneficial products. The grape, rich in various organic acids, vitamins and minerals and bioactive compounds with natural antioxidant properties has taken its place in the food industry for different purposes. Grape juice, must, molasses and grape pulp produced after wine production is an important food waste. The grape pulp contains 10%-30% of the crushed grape mass and other value-added components such as unfermented sugars, polyphenols, colors, alcohol, and tannins. These compounds should be recovered using acceptable, eco-friendly techniques without compromising the stability or quality of the product. The recovery of useful substances from food waste is a new development in the food industry. Thus, it is achieved to obtain high value-added products. This study, it was aimed to investigate the production of a new functional beverage with high phenolic content by drying the waste grape pulp formed after pressing purple grapes.
3
Fang, Baochen, and Jiajia Rao. "Functional, nutritional properties and aroma profile of hemp protein isolate by reverse micelles extraction technique: impact of defatting processing." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/wzgi5968.
Full textAbstract:
There is an increased awareness of the incorporation of hemp protein in a commercial product on account of its high nutritional value and neutral flavor. One of the factors that impact the functional properties of hemp protein is the isolation conditions. In recent years, reverse micelles (RMs) has emerged as a powerful technique for extracting protein and enzyme because of low cost, convenience, and potential for scaling up in the manufacturing process. For oil crops, it generally requires long defatting processing before protein extraction. Therefore, it would be interesting to investigate whether the defatting of hempseed flour would impact on physicochemical properties of hemp protein using the RM extraction method. Our results revealed that high protein recovery yield (69.37-70.21%) and protein purity (92.76-95.2%) of hemp protein isolate (HPI) could be obtained through the RM technique using either non-defatted hemp flour (ND-HF) or defatted hemp flour (D-HF). Concerning the defatting processing, both HPIs showed great similarity in protein composition, and functional properties including solubility, thermal stability, foaming, and emulsifying properties. Interestingly, HPI obtained from ND-HF had higher essential amino acid ratio when compared to D-HF. Beyond that, distinct gelling behaviors (least gelling concentration, gel strength, and color) have been observed. The HPI gel obtained from ND-HF displayed a higher least gelling concentration (4%) with yellowish color than that of HPI gel from D-HF (2%). In terms of aroma profile, a significantly high number of aromatic compounds with a greater abundancy were detected in HPI from ND-HF (33) as compared to HPI isolated from D-HF (26), which contributed to the different process conditions and lipid content. The research findings provided an eco-friendly protein isolation method with premium functional attributes, especially for oil crops, which pave the way for the future application of RMs in a wide range of protein extraction.
4
Rupasinghe, H. G. T. "Revitalising ghost nets: a fashion design approach using underutilised properties of fish nets." In Integrated Design Research Conference 2024, edited by S. Samarawickrama. Department of Integrated Design, Faculty of Architecture, University of Moratuwa., 2024. https://doi.org/10.31705/idr.2024.10.
Full textAbstract:
This project addresses the environmental issue caused by ghost nets: abandoned fishing nets, primarily made of nylon, which can take over 800 years to degrade in marine environments. The improper disposal of these nets—whether through intentional discarding or unintentional loss—has significantly contributed to marine pollution, posing a serious threat to aquatic ecosystems. While volunteer efforts occasionally result in the collection of ghost nets, these often end up in landfills, compounding the waste problem. The work presented here focuses on transforming ghost nets into innovative, fashion-forward products, adopting an approach that generates value from waste in the realms of fashion and lifestyle design. The project emphasizes upcycling ghost nets into fashionable yet functional products, leveraging fashion design as a vehicle for sustainability. It simultaneously provides job opportunities for the fishing community and reduces marine waste by encouraging and supporting ghost net collection efforts. The tensile wet knot strength, integrity, elongation, and high extensibility of ghost nets are key qualities that this project exploits, transforming an environmental liability into a valuable resource with both aesthetic and functional potential. Methodologically, the project employs a qualitative research approach, incorporating open-ended interviews with key stakeholders—ghost net collectors, fishermen, and target consumers, particularly eco-conscious foreign tourists. These interviews provide insights into the feasibility and community impact of repurposing ghost nets in fashion. The research process involves three stages: cleaning, experimentation, and manufacturing. Cleaning is conducted initially to remove harmful residues from the nets, ensuring safe handling and supporting their recycling. Experimentation follows, involving tests for strength, transparency, and flexibility to adapt the nets for wearable fashion items. The final stage, manufacturing, translates these findings into the production of high-quality, fashion-oriented products. The results of this project highlight the untapped potential of ghost nets as raw materials in fashion design. By upcycling these materials, the research successfully created unique and commercially viable products, thereby extending the life cycle of ghost nets and reducing their environmental impact. The designed products are sustainable, support the economic stability of the fishing community, and promote a circular economy by minimizing waste generation and maximizing value creation. This academic project, conducted in my final year, aligns with global sustainability goals by addressing marine pollution and advocating for ethical material sourcing. It enhances social impact and creates new revenue streams by integrating local fishing communities into the manufacturing chain. The project demonstrates innovative methods to reduce waste while fostering a sustainable fashion industry, particularly in niche markets such as eco-fashion and the hippie segment. Ultimately, the outcomes of this project underscore the transformative potential of sustainable design, illustrating how fashion can actively contribute to ecological preservation and community development. This work serves as a landmark in recycling discarded materials into productive resources and lays a foundation for future endeavors tackling environmental and social challenges through creative design solutions.
5
Chaovasuteeranon, Sarin, Firadao Boonmalert, Najwa Yanya Santiworakun, Acharee Suksuwan, Winai ,. Dahlan, and Nureesun Mahamud. "Characterization of Chitin Extracted from Apple Snail (Pomacea canaliculata) Shells: A Preliminary Study for Chitosan Production." In The International Halal Science and Technology Conference 2024 (IHSATEC): 17th Halal Science Industry and Business (HASIB). Yayasan Sinergi Riset dan Edukasi, 2024. https://doi.org/10.31098/hst24148.
Full textAbstract:
Background – GGolden apple snails (Pomacea canaliculata) are major pests in rice fields, causing significant challenges for farmers. Chemical controls leave sharp residual shells, increasing risks of leptospirosis and medical costs. While golden apple snails in Thailand are used for animal feed and wastewater treatment, they remain underutilized. Their shells, containing 20-50% chitin, can be extracted into chitosan-a non-toxic natural polymer suitable for Halal applications in health-related industries. Chitosan from snail shells offers an eco-friendly solution to reduce agricultural issues and promote sustainable economic opportunities for local communities. Purpose – This research aims to extract and characterize chitin from apple snail shells and evaluate its structural, chemical, and morphological properties. The study also examines contaminants like pesticide residues and heavy metals to assess its suitability for diverse applications. Design/methodology/approach – The extraction conditions included demineralization with 1 M HCl at 25 °C for 2 hours, deproteinization with 2 M NaOH at 25 °C for 2 hours. Fourier-transform infrared spectroscopy (FT-IR) confirmed functional groups, while Scanning Electron Microscopy (SEM) analyzed microstructure. Heavy metal and pesticide residues were assessed using AOAC methods. Findings – The resulting chitin yielded apploximately 40.77 % (w/w) of raw apple snail shells. The FT-IR absortion of light brown chitin powder showed 10 major characteristic peaks between 513 and 3430 cm-1. Metals like As, Cd, Pb, and Hg were undetected, except for 0.149 ppb Cu, and no pesticide residues were found. SEM analysis revealed that the particles had a polygonal shape with a rough surface texture. Research limitations – The extraction is limited by chitosan’s solubility in acid, requiring large shell fragments and higher solvent volumes, increasing cost and complexity. Originality/value – This study highlights that chitin extracted from apple snail shells offers a sustainable source for chitosan production. Utilizing this abundant but underused resource supports waste reduction and enhances agricultural productivity. Safety assessments, including tests for heavy metals and pesticides, confirm its suitability for applications in the food, pharmaceutical, and medical industries.
6
Shenith, W. D. J. N., W. M. A. I. Weerasinghe, and S. Samarawickrama. "Exploring the use of feathers in traditional handloom." In Integrated Design Research Conference 2024. Department of Integrated Design, Faculty of Architecture, University of Moratuwa., 2024. https://doi.org/10.31705/idr.2024.2.
Full textAbstract:
There has been a focus on design innovation and interventions to sustain and enhance the cultural heritage of handloom textiles, especially in the textile industry of Sri Lanka. Renowned for its traditional handloom weaving, the industry faces the challenge of aligning with mass production and fast production cycles, while maintaining its cultural heritage. The traditional designs and textiles do not meet contemporary market demands nor the target audience of today. While studying the handloom machines used by the artisans for an academic project, it was discovered that making changes to the same warp by making alterations to the weft would sustain the continuity of the handloom while producing entirely different textiles. Furthermore, this practice is more sustainable and efficient as opposed to using one warp to produce just one type of textile. This research seeks to innovate within this sector by introducing a natural feather-based handloom textile, utilising feathers as a primary material. The objective is to transform locally sourced feathers, a byproduct of the poultry industry typically discarded as waste, into valuable, eco-friendly textiles that enhance both the environmental and economic landscape of Sri Lanka. Furthermore, this is an artisanal and culturally valued textile substitute to natural fur-based textiles which are less ethical to animals, which also highlights the craftsmanship of the rapidly declining artisanal communities. The methodology adopted in this research is systematic and multi-staged, focusing on both material preparation and the adaptation of traditional weaving techniques. The first stage involves the collection and treatment of feathers to ensure hygiene and durability, making them suitable for use in textiles. The feathers are then transformed into feather rope structures, a process in which the feathers are carefully twisted into ropes that can be incorporated into handloom weaving. This preparation stage is crucial, as it ensures that the feather material is both workable and compatible with traditional weaving techniques. Following this, experimentation with various traditional handloom techniques to effectively integrate feathers into the fabric was carried out. This involves adjusting loom settings and exploring different weaving patterns to accommodate the unique characteristics of feathers. The feather trims were guided by hand and were tightened using the plain-weave technique. This not only ensured the feathers were locked in place in the weave, resulting in longevity but also allowed a smooth and comfortable surface texture to be woven in without any unevenness in the textile. By collaborating with local artisans, the study emphasises a participatory approach, ensuring that the innovation respects and values the artisan’s knowledge of heritage craftsmanship to build contemporary textiles. The collaboration with local artisans plays a critical role in this research, as their expertise and familiarity with traditional techniques are invaluable. Engaging with the artisans through trial and error allowed for a co-creative process that led to the discovery of new techniques and applications for feather-based textiles that match quality, comfort, and durability. Preliminary findings revealed that it is possible to achieve a distinct aesthetic appeal using feathers due to the natural colouration and texture of feathers which appeared more or less similar to fur textiles. The natural characteristics of feathers, including their lightweight structure, softness, and muted hues, enhance the aesthetic and functional qualities of the textiles, making them appealing for a variety of applications. Furthermore, their marketability will appeal to both local and international markets seeking sustainability and uniqueness, expanding to garments as well as home decor products such as rugs. The design further amplifies the market appeal of feather-based handloom textiles, especially among consumers seeking eco-friendly, culturally rich, and ethically produced goods. The innovation holds significant potential for the local textile industry by creating value from poultry industry waste, introducing a new revenue stream that supports both sustainability and local craftsmanship. Artisanal communities and their livelihoods stand to benefit from increased demand for their skills, as the production of feather-based textiles requires their expertise in handloom weaving. Environmentally, it supports waste reduction and promotes the use of natural, biodegradable materials, aligning with global sustainability goals. The feather-based textiles offer a sustainable alternative to synthetic and fur materials, reducing the environmental impact associated with conventional textile production. Additionally, the use of locally sourced feathers minimises the carbon footprint involved in raw material transportation, contributing to the eco-friendliness of the entire process. In conclusion, by combining sustainable practices with cultural heritage preservation, this research contributes to a textile model that is environmentally, economically, and ethically viable. This research offers a pathway for traditional craftsmanship to coexist with contemporary design, fostering a textile industry that honours its cultural roots while embracing sustainable innovation.
7
Ariyathilake, P. B. S. D., and S. Samarawickrama. "Environmentally responsive traditional packaging practice: ‘Peni Mula’." In Integrated Design Research Conference 2024, edited by S. Samarawickrama. Department of Integrated Design, Faculty of Architecture, University of Moratuwa., 2024. https://doi.org/10.31705/idr.2024.15.
Full textAbstract:
Traditional packaging practices combine cultural heritage with environmental responsibility, offering sustainable solutions to modern packaging challenges. The over-reliance on synthetic materials, particularly plastics, has caused severe environmental damage, making eco-friendly alternatives essential. The growing concern over plastic pollution and its environmental impact emphasises the need for packaging solutions that reduce waste. Sri Lanka’s traditional packaging methods, deeply rooted in its ecological and cultural heritage, utilise biodegradable materials that align with modern sustainability principles. Among these, the “Peni Mula" stands out for its unique ability to store liquid products, particularly the "Kithul" treacle, often referred to as "Honey”, in an environmentally friendly manner. The "Peni Mula" is crafted from the Areca palm leaf sheath, a fibrous, biodegradable material used to store "Kithul" treacle, Once filled, the "Peni Mula" was traditionally hung over household chimneys for months or years, allowing the treacle to crystallise into "Veli Hakuru" (sand jaggery), a natural sweetener used before sugar became widely available. This process illustrates how traditional packaging methods serve both functional purposes and help preserve local agricultural products and food practices. Beyond its functionality, the "Peni Mula" holds significant cultural value in Sri Lanka. It was used in Buddhist rituals, offerings to deities, and ceremonies such as the "Kiri Maduwa". It was also often gifted during visits to relatives, symbolising the importance of sharing and community life. The cultural significance of the "Peni Mula" further underscores its role as a symbol of sustainability, reflecting the community’s deep connection to both their environment and spiritual values. Despite its cultural and practical importance, the "Peni Mula" is now rare, confined mainly to the "Kithul" industry. The decline in its use reflects the broader shift from traditional to industrial packaging methods, which are mass-produced and less sustainable. This decline emphasises the need to preserve traditional packaging practices that offer valuable lessons in both cultural heritage and modern sustainability efforts. However, such methods are poorly documented, with only a few references, such as Doreen Alles’s “Traditional Forms of Packaging and Vending(1982)”. This lack of documentation jeopardises the survival of these techniques, which face increasing competition from industrial packaging. This research focuses on the “Peni Mula" as a case study that bridges traditional knowledge with modern packaging needs. It documents the lifecycle of the “Peni Mula”, from sourcing the Areca palm leaf sheath to crafting, filling, sealing, and transporting the treacle. This process demonstrates the packaging’s efficiency, adaptability, and ability to meet practicalrequirements while supporting environmental sustainability. Additionally, the study highlights the Peni Mula's biodegradability and zero-waste properties, positioning it as a closed-loop solution with minimal environmental impact. Peni Mula's design is a model of efficiency, leveraging the properties of the Areca palm sheath to create a flexible, sturdy, and biodegradable structure. This packaging ensures that the “Kithul" treacle remains safe from leakage, contamination, and spoilage during storage and transit, offering excellent barrier properties that preserve product integrity. These natural materials, combined with eco-friendly construction methods, make the “Peni Mula" a valuable model for sustainable packaging solutions in contemporary contexts. Its design could inspire new packaging technologies that combine traditional materials with modern practices to reduce synthetic packaging use. By studying the “Peni Mula”, this academic research not only preserves Sri Lanka’s cultural heritage but also uncovers innovative, sustainable packaging solutions. The lessons learned can inspire new, resource-efficient designs that reduce waste and environmental impact. As we strive for a sustainable future, traditional practices like the “Peni Mula" offer valuable insights into solving modern environmental challenges.
8
Alam, Rubel, Gaffar Hossain, Günter Grabher, and Mokbul Hossain. "Applications of Low Pressure Plasma in High-tech Textiles." In 13th International Conference on Plasma Surface Engineering September 10 - 14, 2012, in Garmisch-Partenkirchen, Germany. Linköping University Electronic Press, 2013. http://dx.doi.org/10.3384/wcc2.247-250.
Full textAbstract:
The textile and clothing industries especially in developed countries are facing now-a-days some big challenges largely because of the globalization process. Therefore, the market of a high-functional, added value and technical textiles is deemed to be essential for their sustainable growth. The growing environmental and energy-saving concerns will also lead to the gradual replacement of many traditional wet chemical-based textile processing by various forms of low liquor and dry-finishing processes. The main reason for the increasing interest is that industrially well-established surface finishing processes suffer considerably from environmental demands such as large amount of water, energy and effluents. Plasma technology, when developed at a commercially viable level, has strong potential to offer in an attractive way to obtain new functionalities in textiles. The synthetic fibres such as polypropylene (PP), polyester (PES), Aramid (AR) etc. are widely used in apparel and home furnishings due to their good physical and chemical properties. The demand of these fibres increases greatly for high performance applications such as smart textiles, technical textiles, operation clothing etc. and more recently, for their potential applications in electronic textiles. But these fibres often reveal hydrophobic nature due to the lack of polar functional groups. The hydrophobic nature of such fabrics limits their application to the above mentioned areas. In addition, adhesion is fundamentally a surface property, often governed by a layer of molecular dimensions, which necessarily required for coating, bonding and printing of synthetic textiles. The low surface energy of hydrophobic polymeric materials results in intrinsically poor adhesion. On the other hand, some natural fibres (e.g. cotton, wool, linen) and synthetic fibres (e.g. rayon, viscose, acetate, spun nylon) exhibit to be hydrophilic in nature due to their polar functionalities. Hydrophilicity of such fibres may act as a barrier for their applications in many areas where liquids repellent is necessary. It is a wide-reaching technical effect that is sought after in several industry sectors, from biosciences, healthcare and electronics to industrial filtration, sports and active wear. In addition to water repellency, other liquids such as oils, inks and alcohols repellency often required. Liquids are constantly in use around us, in the majority of cases in the form of rain water and food and beverages. Arguably, the most noticeable, unfavorable interactions of these liquids are with textile products such as clothing, carpets and upholstery, so added value can be provided by protecting these items from interacting with the liquids, enabling the liquids to roll off or be dabbed away, leaving the underlying material unchanged. Furthermore, hydrophobicity of textiles is frequently associated with self-cleaning properties. When a water droplet rolls off the surface, the surface impurities such as dust get carried away by the droplet resulting in a self-cleaning effect. Using plasma technology to modify textile surfaces with precision cleaning, etching, chemical priming for lowering or raising surface energy can be used to obtain a desirable property of an end product. The plasma technology, a dry and eco-friendly technique, avoids waste water production which is a unique advantage over the wet-chemical processes. This benefit extends into all market areas, where the end product can undergo the plasma enhancement process to provide properties such as adhesion, hydrophilic, liquid-repellent etc. However, to transfer this technology from laboratory into industry, both the scale-up and economic aspects have to be regarded. Main objective of this work is to study the possibility of substituting plasma processes for the traditional wet chemical methods using an industrial plasma reactor aiming to produce wash permanent super-hydrophilic, super hydrophobic textile surfaces.
9
"Molecular composition - inhibition activity relationships for humic substances narrow fractions sets obtained by solid-phase extraction." In Sixth International Conference on Humic Innovative Technologies "Humic Substances and Eco-Adaptive Technologies ”(HIT – 2021). Non-Commercial Partnership "Center for Biogenic Resources "Humus Sapiens" (NP CBR "Humus Sapiens"), 2021. http://dx.doi.org/10.36291/hit.2021.mikhnevich.001.
Full textAbstract:
Humic substances (HS) have a wide spectrum of biological activity including inhibitory activity against β-lactamases.1 The latter are capable of hydrolyzing beta-lactam antibiotics and represent one of the main pathways of bacterial antibiotic resistance. HS are characterized by low toxicity and good solubility in water. A use of HS for therapeutic purposes is hindered by extreme molecular heterogeneity and high level of isomeric complexity. Solid-phase extraction (SPE) fractionation in combination with ultra-high resolution mass spectrometry (FTICR MS) is a promising method to simplify this molecular system and isolate the most active components of HS. The aim of this work was to test various SPE fractionation schemes as an approach to directed isolation of the components with the given activity from HS. The sample of coal humic acids (CHA-G) was isolated from the commercial sodium humate “Genesis” and separated using SPE cartridge according to gradients in polarity1 and acidity2 inherent within the molecular components of HS. Inhibitory activity against β- lactamase TEM-1 and its mutants was measured using chromogenic substrate CENTA. Molecular composition of fractions was determined using FTICR mass spectrometer 15 T solariX (Bruker Daltonics) located at the Collective Use Center of Zelinsky Institute of Organic Chemistry of RAS. Molecular assignments were plotted into van Krevelen diagrams. The diagrams were binned into 20 cells are assigned to seven chemotypes, and occupational densities for each chemotype were calculated after Perminova.3 For the fractions separated by polarity, a substantial difference in the molecular composition was observed. Inhibitory activity grew along with an increase in hydrophobicity. The HS activity increased along with an increase in contribution of condensed tannins and phenylisopropanoids (O/C <0.5, H/C <1.4) and decreased along with contribution of hydrolyzed tannins (O/C> 0.5, H/C <1.4). The similar analysis was conducted for the fractions separated with regard to pKa value of the dominating functional groups. The most isomeric complex molecular components were defined, which can be found in different HS fractions, but they are identical in elemental composition. The data obtained make it possible to choose the most efficient fractionation method that effectively lowers the molecular complexity of HS and makes it possible to isolate the most active HS fractions. SPE-fractionation in combination with 2D chromatography is going to be used in our future studies to achieve high resolution separation and more reliable “molecular composition-activity” relationships. Further research might bring substantial advance in the field of directed design of biologically active humic-based materials and compositions. Acknowledgements. This work was supported by the grant of the Russian Science Foundation no 21-73-20202. The center of collective use of the Zelinsky IOC RAS is appreciated. The research was conducted in the framework of the Scientific-Educational School of the Lomonosov MSU “Future of the plant and global environmental change”. References 1. Mikhnevich et al., ACS Omega, 2021, https://doi.org/10.1021/acsomega.1c02841 2. Zherebker et al., Environ. Sci. Technol. 2020, 54, 2667−2677 3. Perminova, I. V. PAC, 2019, 91(5), 851