1,720,967 research outputs found
Versatile, flexible rice starch-graphene oxide bio-nanocomposites
No full textIn light of the pressing challenge of global plastic and water pollution, this study seeks a single solution by exploring the remarkable potential of rice starch (RS)-graphene oxide (GO) bio-nanocomposite films. RS-GO composite films were prepared with varying GO concentrations. As the GO weight percentage was increased from 0 wt% to 1 wt% of starch, the ultimate tensile strength of the composite was seen to increase by 438%, whereas a marginal decrease of 29% in elongation was observed. Reinforcement of GO into the starch film also helped to enhance the melting temperature because of the strong hydrogen bond formation between RS and GO sheets. Apart from the enhanced mechanical and thermal stability of the prepared composite films, they also exhibited antibacterial properties against both Gram-positive and Gram-negative bacterial strains, encouraging their use in food packaging and storage industries. In addition, the use of RS-GO biocomposites as adsorbent materials for lead removal from wastewater was also explored. As the GO concentration was increased in the composite film, the Pb(ii) ion removal efficiency (RE) also increased, with a maximum RE of 99% observed for 5 wt% GO film from 10 ppm Pb(ii) water solution. In conclusion, the ability of RS-GO bio-nanocomposites to address plastic and water pollution adds to their value as eco-friendly materials
Use of watermelon rind powder (WRP) as reinforcement for preparing biodegradable rice starch biocomposite
No full textCross-material synergies of carbon nanomaterials, MOFs, and COFs: Innovative approaches for sustainable environmental remediation and resource recovery
No full textSustainable environmental remediation and resource recovery are critical to addressing pollution, resource depletion, and ecosystem degradation. This review introduces the new concept of cross-material synergies, integrating carbon nanomaterials (CNMs), Metal-Organic Frameworks (MOFs), and Covalent Organic Frameworks (COFs) into multi-functional composite systems. By leveraging their complementary properties, these materials overcome key challenges such as structural instability, poor selectivity, and scalability limitations. Cross-material composites—including MOF@COF hybrids and CNM-MOF integrations—enhance adsorption performance, stability, and reusability compared to their individual components. Our review demonstrate how these hybrid systems improve pollutant removal, catalytic degradation, and resource recovery, aligning with sustainability goals. Their ability to transform waste into valuable materials supports circular economy principles and key Sustainable Development Goals (SDGs), including SDG 6 (Clean Water and Sanitation), SDG 12 (Responsible Consumption and Production), and SDG 13 (Climate Action). Furthermore, the review highlights strategies for optimising material performance, ensuring industrial scalability, and minimising environmental impact through Safe and Sustainable by Design (SSbD) approaches. Unlike previous reviews that focus on individual materials, this work provides a holistic roadmap for designing and deploying cross-material composites for real-world applications. By bridging fundamental research with industrial implementation, these systems present a transformative step toward sustainable material science, with far-reaching implications for environmental remediation and resource recovery. Future research should focus on enhancing synthesis efficiency, ensuring long-term material stability, and addressing economic feasibility for large-scale deployment
Effect of the alkaline treatment of pineapple leaf fibres (PALF) on PALF reinforced rice starch bioplastic
No full textCharacterization of pineapple leaf fibers and graphene oxide reinforced rice starch bio composite
No full textCross-material synergies of carbon nanomaterials, MOFs, and COFs:Innovative approaches for sustainable environmental remediation and resource recovery
Full text linkSustainable environmental remediation and resource recovery are critical to addressing pollution, resource depletion, and ecosystem degradation. This review introduces the new concept of cross-material synergies, integrating carbon nanomaterials (CNMs), Metal-Organic Frameworks (MOFs), and Covalent Organic Frameworks (COFs) into multi-functional composite systems. By leveraging their complementary properties, these materials overcome key challenges such as structural instability, poor selectivity, and scalability limitations. Cross-material composites—including MOF@COF hybrids and CNM-MOF integrations—enhance adsorption performance, stability, and reusability compared to their individual components. Our review demonstrate how these hybrid systems improve pollutant removal, catalytic degradation, and resource recovery, aligning with sustainability goals. Their ability to transform waste into valuable materials supports circular economy principles and key Sustainable Development Goals (SDGs), including SDG 6 (Clean Water and Sanitation), SDG 12 (Responsible Consumption and Production), and SDG 13 (Climate Action). Furthermore, the review highlights strategies for optimising material performance, ensuring industrial scalability, and minimising environmental impact through Safe and Sustainable by Design (SSbD) approaches. Unlike previous reviews that focus on individual materials, this work provides a holistic roadmap for designing and deploying cross-material composites for real-world applications. By bridging fundamental research with industrial implementation, these systems present a transformative step toward sustainable material science, with far-reaching implications for environmental remediation and resource recovery. Future research should focus on enhancing synthesis efficiency, ensuring long-term material stability, and addressing economic feasibility for large-scale deployment.<br/
Cellulose acetate-nanoMOF beads:a safe, sustainable and scalable solution for Pb remediation in complex water systems
Full text linkPb [Pb(II)] contamination poses a critical environmental and public health challenge, necessitating innovative and sustainable remediation strategies. This study presents cellulose acetate (CA)-BNMG-1 nanoMOF beads, synthesised via a green, water-based process without hazardous chemicals. By embedding this nanoMOF into a CA polymer matrix, the beads achieve remarkable Pb(II) removal efficiencies exceeding 80% in complex aqueous systems, including canal water and artificial seawater, even with competing ions and naturally occurring microbial contaminants in canal water. The beads exhibit significantly enhanced selectivity for Pb(II), with separation factors (SFs) improving from 2.5 to 350 for Pb/Mn, 57.4 to 220.6 for Pb/Ni, and 150.6 to 314 for Pb/Cd compared to the parent BNMG-1 nanoMOF. Structural stability is ensured, with Cu(II) leaching reduced to below 5% at higher and less than 1% at lower Pb(II) concentrations (5 bead per mL). Furthermore, the beads demonstrate outstanding reusability, retaining over 95% Pb(II) removal efficiency after three cycles. The CA matrix enhances nanoMOF stability, facilitating bead recovery via simple filtration, addressing challenges in scalability and sustainability. This work aligns with safe and sustainable by design (SSbD) framework, providing an eco-friendly and scalable solution for heavy metal remediation, advancing sustainable water treatment technologies for real-world applications
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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