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  • 1
    Online Resource
    Online Resource
    Araucaria Araucana thermoplastic starch nanocomposite films reinforced with nanocellulose
    Walter de Gruyter GmbH ; 2023
    In:  Physical Sciences Reviews Vol. 0, No. 0 ( 2023-05-09)
    Details
    In: Physical Sciences Reviews, Walter de Gruyter GmbH, Vol. 0, No. 0 ( 2023-05-09)
    Abstract: Araucaria Araucana starch is a raw material with proven potential in obtaining biodegradable polymers. Plasticization improves the flexibility characteristics of starch-based films, however, they still tend to have low tensile strength and high hydrophilicity. The addition of nanocellulose is a technique to improve these characteristics. In this paper, the effects of adding different sources and concentrations of nanocellulose (NC) on the properties of thermoplastic Araucaria Araucana films are addressed. One can highlight, the main effects are the increase of tensile strength and transparency of the films along with the reduction of water vapor permeability and water solubility. Further studies involving the reinforcement of Araucaria Araucana starch and nanocellulose should be conducted to overcome the lack of information.
    Type of Medium: Online Resource
    ISSN: 2365-6581 , 2365-659X
    URL: Article
    DOI: 10.1515/psr-2022-0021
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2023
    detail.hit.zdb_id: 2864634-4
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  • 2
    Online Resource
    Online Resource
    Sugar palm ( Arenga p innata ) thermoplastic starch nanocomposite films reinforced with nanocellulose
    Walter de Gruyter GmbH ; 2023
    In:  Physical Sciences Reviews Vol. 0, No. 0 ( 2023-05-09)
    Details
    In: Physical Sciences Reviews, Walter de Gruyter GmbH, Vol. 0, No. 0 ( 2023-05-09)
    Abstract: The growing consciousness about global environmental concerns, particularly landfills, in conjunction with the rapid use of petroleum-based plastics, is a key factor behind the use of natural and biodegradable polymers in short-life applications like food packaging, container, and tray. Sugar palm stem is a biomass that has proven the potential to produce biodegradable polymers such as sugar palm starch. Nevertheless, their applications were limited due to their low tensile strength and excessive hydrophilicity. Plasticization using polyols, reinforcement with sugar palm fiber, cellulose, microcrystalline cellulose, or nanocellulose, blending with thermoplastic polymer, and addition of essential oils has been used to maximize the functional qualities of the starch biopolymer. As the content of plasticizers grew, the glass transition temperature and water absorption ability decreased. Furthermore, the addition of sugar palm nanocellulose to sugar palm starch improves the performances of sugar palm starch-based films as a packaging material. Addition of essential oil contributes to antibacterial properties and slightly improved tensile strength of the film. A comprehensive understanding on the interaction of starch-based biodegradable polymer and nanocellulose constituents for enhancing the physico-chemical properties of starch-based films is prerequisite for researchers in the design of industrial products with enhanced functional attributes. To address the knowledge gap, more studies including the reinforcement of new types of biodegradable polymer and nanocellulose derived from natural sources should be conducted in order to continually populate the database for research purposes.
    Type of Medium: Online Resource
    ISSN: 2365-6581 , 2365-659X
    URL: Article
    DOI: 10.1515/psr-2022-0031
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2023
    detail.hit.zdb_id: 2864634-4
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  • 3
    Online Resource
    Online Resource
    Emission properties of reduced graphene oxide-coated Er3+-tellurite glass for fiber optics
    Springer Science and Business Media LLC ; 2022
    In:  Journal of Materials Science: Materials in Electronics Vol. 33, No. 36 ( 2022-12), p. 26915-26930
    Details
    In: Journal of Materials Science: Materials in Electronics, Springer Science and Business Media LLC, Vol. 33, No. 36 ( 2022-12), p. 26915-26930
    Type of Medium: Online Resource
    ISSN: 0957-4522 , 1573-482X
    URL: Article
    DOI: 10.1007/s10854-022-09356-6
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2016994-2
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  • 4
    Online Resource
    Online Resource
    Nanocellulose: from biosources to nanofiber and their applications
    Walter de Gruyter GmbH ; 2023
    In:  Physical Sciences Reviews Vol. 0, No. 0 ( 2023-05-09)
    Details
    In: Physical Sciences Reviews, Walter de Gruyter GmbH, Vol. 0, No. 0 ( 2023-05-09)
    Abstract: Nanocellulose is a product of cellulose, a sustainable and plentiful resource. It’s distinctive nanoscale structure makes it a versatile, green and interesting material for a variety of applications. This article describes in detail the biosources of nanocellulose, the types and characteristics of nanocellulose, and the techniques used to produce nanocellulose fibers. The mechanical properties and morphologies of nanocellulose fibers are addressed in depth, along with their prospective applications in sectors, including paper packaging, building materials, composites, biomedicine, energy storage and filtration. In addition, the current state of nanocellulose research, including the opportunities in the field, as well as the future prospects of nanocellulose as a viable and sustainable material for a vast array of applications, are discussed.
    Type of Medium: Online Resource
    ISSN: 2365-6581 , 2365-659X
    URL: Article
    DOI: 10.1515/psr-2022-0008
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2023
    detail.hit.zdb_id: 2864634-4
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  • 5
    Online Resource
    Online Resource
    Antimicrobial Activities of Starch-Based Biopolymers and Biocomposites Incorporated with Plant Essential Oils: A Review
    MDPI AG ; 2020
    In:  Polymers Vol. 12, No. 10 ( 2020-10-19), p. 2403-
    Details
    In: Polymers, MDPI AG, Vol. 12, No. 10 ( 2020-10-19), p. 2403-
    Abstract: Recently, many scientists and polymer engineers have been working on eco-friendly materials for starch-based food packaging purposes, which are based on biopolymers, due to the health and environmental issues caused by the non-biodegradable food packaging. However, to maintain food freshness and quality, it is necessary to choose the correct materials and packaging technologies. On the other hand, the starch-based film’s biggest flaws are high permeability to water vapor transfer and the ease of spoilage by bacteria and fungi. One of the several possibilities that are being extensively studied is the incorporation of essential oils (EOs) into the packaging material. The EOs used in food packaging films actively prevent inhibition of bacteria and fungi and have a positive effect on food storage. This work intended to present their mechanical and barrier properties, as well as the antimicrobial activity of anti-microbacterial agent reinforced starch composites for extending product shelf life. A better inhibition of zone of antimicrobial activity was observed with higher content of essential oil. Besides that, the mechanical properties of starch-based polymer was slightly decreased for tensile strength as the increasing of essential oil while elongation at break was increased. The increasing of essential oil would cause the reduction of the cohesion forces of polymer chain, creating heterogeneous matrix and subsequently lowering the tensile strength and increasing the elongation (E%) of the films. The present review demonstrated that the use of essential oil represents an interesting alternative for the production of active packaging and for the development of eco-friendly technologies.
    Type of Medium: Online Resource
    ISSN: 2073-4360
    URL: Article
    DOI: 10.3390/polym12102403
    Language: English
    Publisher: MDPI AG
    Publication Date: 2020
    detail.hit.zdb_id: 2527146-5
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  • 6
    Online Resource
    Online Resource
    Banana starch nanocomposite films reinforced with nanocellulose
    Walter de Gruyter GmbH ; 2023
    In:  Physical Sciences Reviews Vol. 0, No. 0 ( 2023-05-11)
    Details
    In: Physical Sciences Reviews, Walter de Gruyter GmbH, Vol. 0, No. 0 ( 2023-05-11)
    Abstract: Owing to the increasing global pollution due to the use of conventional plastic materials, biodegradable films and sheets have been given prominent importance owing to their efficiency in replacing traditional plastic materials. In the recent times, due to globalization and industrialization, the minimization of the use of synthetic petroleum-based materials has been in practice by the global community, and increase in the use of natural materials like biomass waste in place of traditional materials promoting the green and sustainable technology development. Such production of alternative biomaterials development from the lignocellulosic fiber-reinforced composite films and laminates has been seriously investigated by engineers, technologists, and materialists owing to their sustainability, renewability, low toxicity, and abundantly available. Banana is one among the largely consumed tropical crop globally which is due to the quantity of cultivation and the availability of calorific values in the fruit. It is also a fruit which is potentially rich in starch content with more than 65 % of starch. This banana starch can be considered as a potential material for the manufacturing of coating material, edible sheet, food preservation and packaging owing to its innocuous, less cost, and biodegradability. The application of banana starch is dictated by the functional, structural and physicochemical properties of the developed material. But an unmodified native banana starch may not be characterized with all the necessary properties for any customized application. In order to widen the application band of the banana starch, it has to be modified by using enzymes, chemical, and physical methods. This review comprehensively deals with the extraction and synthesis of banana starch from various sources, their modification, properties of the banana starch and its characterization. Some aspects regarding the hybridization of the banana starch with nanoparticles has also been given.
    Type of Medium: Online Resource
    ISSN: 2365-6581 , 2365-659X
    URL: Article
    DOI: 10.1515/psr-2022-0034
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2023
    detail.hit.zdb_id: 2864634-4
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  • 7
    Online Resource
    Online Resource
    A Numerical Study on Indoor Air Quality (IAQ) Designs for Hospital Waiting Room in The Context of COVID-19 For Hot and Warm Humidity Climate
    IOP Publishing ; 2021
    In:  Journal of Physics: Conference Series Vol. 2071, No. 1 ( 2021-10-01), p. 012056-
    Details
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 2071, No. 1 ( 2021-10-01), p. 012056-
    Abstract: COVID-19 is a virus originated from Corona Virus which can severe acute respiratory syndrome (SARS) symptoms such as chest pain, dry cough, fever, and difficulty breathing. The AC and ventilation system is not only important for the thermal comfort occupants but to ensure the room is safe and free from infectious virus. Thermal comfort is important measurement in indoor space which influenced by temperature, Relative Humidity (RH), airflow velocity and others. This research was executed and focused on lecture room in Bilik Persatuan 10, Universiti Malaysia Perlis (UniMAP) instead of real hospital waiting room. It comes with the room dimensions 11.87m (Length) × 5.17m (Width) × 2.93m (Height) for the numerical study. In addition, Computational Fluid Dynamics (CFD) analysis is used to investigate the air flow pattern and temperature distribution inside the room. By using software Ansys FLUENT 19, field experimental and simulation work can be compared which have 14.55% difference in temperature distribution. It is expected by increasing the air velocity of the AC inlet diffuser influence the pattern of airflow in the room, but average temperature remains same for all these conditions.
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    URL: Article
    DOI: 10.1088/1742-6596/2071/1/012056
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2166409-2
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  • 8
    Online Resource
    Online Resource
    The Effect of Precursor Concentration on the Particle Size, Crystal Size, and Optical Energy Gap of CexSn1−xO2 Nanofabrication
    MDPI AG ; 2021
    In:  Nanomaterials Vol. 11, No. 8 ( 2021-08-22), p. 2143-
    Details
    In: Nanomaterials, MDPI AG, Vol. 11, No. 8 ( 2021-08-22), p. 2143-
    Abstract: In the present work, a thermal treatment technique is applied for the synthesis of CexSn1−xO2 nanoparticles. Using this method has developed understanding of how lower and higher precursor values affect the morphology, structure, and optical properties of CexSn1−xO2 nanoparticles. CexSn1−xO2 nanoparticle synthesis involves a reaction between cerium and tin sources, namely, cerium nitrate hexahydrate and tin (II) chloride dihydrate, respectively, and the capping agent, polyvinylpyrrolidone (PVP). The findings indicate that lower x values yield smaller particle size with a higher energy band gap, while higher x values yield a larger particle size with a smaller energy band gap. Thus, products with lower x values may be suitable for antibacterial activity applications as smaller particles can diffuse through the cell wall faster, while products with higher x values may be suitable for solar cell energy applications as more electrons can be generated at larger particle sizes. The synthesized samples were profiled via a number of methods, such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR). As revealed by the XRD pattern analysis, the CexSn1−xO2 nanoparticles formed after calcination reflect the cubic fluorite structure and cassiterite-type tetragonal structure of CexSn1−xO2 nanoparticles. Meanwhile, using FT-IR analysis, Ce-O and Sn-O were confirmed as the primary bonds of ready CexSn1−xO2 nanoparticle samples, whilst TEM analysis highlighted that the average particle size was in the range 6−21 nm as the precursor concentration (Ce(NO3)3·6H2O) increased from 0.00 to 1.00. Moreover, the diffuse UV-visible reflectance spectra used to determine the optical band gap based on the Kubelka–Munk equation showed that an increase in x value has caused a decrease in the energy band gap and vice versa.
    Type of Medium: Online Resource
    ISSN: 2079-4991
    URL: Article
    DOI: 10.3390/nano11082143
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2662255-5
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  • 9
    Online Resource
    Online Resource
    Myths about Coronavirus: A Research Defense
    Canadian Center of Science and Education ; 2022
    In:  Global Journal of Health Science Vol. 14, No. 2 ( 2022-01-31), p. 63-
    Details
    In: Global Journal of Health Science, Canadian Center of Science and Education, Vol. 14, No. 2 ( 2022-01-31), p. 63-
    Abstract: The discovery of coronavirus is a state-of-the-art scientific study, so there is no doubt in the whole world that it is an innovation. But cybercriminals are working to create suspicion so that people are confused and afraid of the coronavirus. Cybercriminals are committing crimes from the global cloud network. They are carrying out extrajudicial killings around the world by abusing wireless sensor technology based on the victim & rsquo;s active open eye, voice, adjacent sensor device and a specific GPS location, while spreading lies about the coronavirus pandemic in the media. New variants of the coronavirus are being created by cybercriminals and over time cyber killer groups are spreading to target-based regions of the universe, putting the world in a serious crisis threatening everyone & rsquo;s survival. Surveys show that the death toll is rising and no one can say when the coronavirus will end and everyone will regain their right to life. The study indicates that lawmakers, health workers and technologists are blindfolded and foolishly looking for vaccines as a way to escape the coronavirus in the open air while others are dying helplessly. For coronavirus pandemic management and disease-free living for all, their sensor technological knowledge is essential, but such knowledge is insufficient. This is because cybercriminals have hypnotized each of their brains to their specific GPS location, depriving them of the right to decide for exposure in the media. The results of a unique study - coronavirus survival and its origin - published research is very difficult to reach relevant legislators and stakeholders. Research published on the publisher & rsquo;s website has been bounced by cybercriminals for political malpractice and lack of proper sensor security. The study illustrates the interrelationship among the political agenda, mysterious lockdowns and digital assassination through global wireless clouding. Today or the day after tomorrow, the importance of this research should be made known to all, otherwise no one will be saved from the digital death of cyber criminals. Lying about coronavirus is nothing more than propaganda of GPS sensor abusers. To avoid this propaganda, everyone in the world must be aware and the legal system of each country must be properly implemented to suppress cyber criminals. This advanced study is an absolute witness to the building of a peaceful world for all generations, which encourages all to be vigilant and create a conscious circle to deal with this pandemic while maintaining equality and neutrality.
    Type of Medium: Online Resource
    ISSN: 1916-9744 , 1916-9736
    URL: Article
    DOI: 10.5539/gjhs.v14n2p63
    Language: Unknown
    Publisher: Canadian Center of Science and Education
    Publication Date: 2022
    detail.hit.zdb_id: 2491737-0
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  • 10
    Online Resource
    Online Resource
    Nanocellulose Reinforced Thermoplastic Starch (TPS), Polylactic Acid (PLA), and Polybutylene Succinate (PBS) for Food Packaging Applications
    Frontiers Media SA ; 2020
    In:  Frontiers in Chemistry Vol. 8 ( 2020-4-15)
    Details
    In: Frontiers in Chemistry, Frontiers Media SA, Vol. 8 ( 2020-4-15)
    Type of Medium: Online Resource
    ISSN: 2296-2646
    URL: Article
    DOI: 10.3389/fchem.2020.00213
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2020
    detail.hit.zdb_id: 2711776-5
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