Article
Biochemistry & Molecular Biology
Houssine Khalili, Adil Bahloul, El-Houssaine Ablouh, Houssine Sehaqui, Zineb Kassab, Fatima-Zahra Semlali Aouragh Hassani, Mounir El Achaby
Summary: This study aims to investigate the reinforcing effect of CMFs and CNCs extracted from alfa fibers on the properties of starch biopolymer. It was found that the addition of CMFs increased film stiffness but decreased elongation, while the addition of CNCs increased film ductility. Therefore, introducing fibers of different sizes into starch can produce biocomposite materials with a wide range of properties for food packaging application.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Applied
Cong Chen, Wenjing Sun, Jinwu Wang, Douglas J. Gardner
Summary: Cellulose nanocrystals (CNCs) are considered as a potential renewable and biodegradable packaging material with desirable properties. However, neat CNC films are too rigid and brittle for packaging applications. By adding different additives, the properties of CNC films can be improved, such as enhancing transparency, improving water durability, and changing hydrophilicity. All CNC films show sufficient oxygen barrier properties.
CARBOHYDRATE POLYMERS
(2023)
Article
Polymer Science
Beatriz Melendez-Rodriguez, Sergio Torres-Giner, Lorenzo Zavagna, Chris Sammon, Luis Cabedo, Cristina Prieto, Jose M. Lagaron
Summary: In this study, electrospinning technology was used to successfully process EVOH44 copolymer with cellulose nanocrystals (CNCs), resulting in hybrid nanocomposite films with improved properties. Increasing the CNCs content led to enhancements in mechanical properties, but also accompanied by reductions in certain aspects of performance. Furthermore, the oxygen barrier properties of the films remained high at different relative humidities, demonstrating great potential as barrier materials for food packaging.
Article
Food Science & Technology
Kailong Zhang, Tian Ren, David Harper, Mi Li
Summary: The study developed antimicrobial films by incorporating CNC and cinnamaldehyde-based Pickering emulsions into polyvinyl alcohol, with the modification of CNC by ethyl lauroyl arginate to improve emulsion stability. The films showed significant inhibition of microbial growth and reduced deterioration rate of strawberries with 2% emulsion added.
FOOD PACKAGING AND SHELF LIFE
(2022)
Article
Food Science & Technology
Kailong Zhang, Tian Ren, David Harper, Mi Li
Summary: Antimicrobial films were developed by incorporating cellulose nanocrystals and cinnamaldehyde-based Pickering emulsions, with the addition of a cationic surfactant for stability enhancement. These films showed significant inhibition of microbial growth while maintaining mechanical properties and stability, demonstrating promising applications in antimicrobial food packaging.
FOOD PACKAGING AND SHELF LIFE
(2022)
Article
Biochemistry & Molecular Biology
Sofia M. Costa, Diana P. Ferreira, Pilar Teixeira, Lina F. Ballesteros, Jose A. Teixeira, Raul Fangueiro
Summary: This study evaluated the potential of chitosan/cellulose nanocrystals films for meat packaging applications. The incorporation of CNC improved thermal stability and oxygen barrier properties, while maintaining water vapor permeability. The films exhibited bactericidal and fungicidal activities, and effectively delayed meat spoilage under refrigeration conditions, highlighting their green alternative for food preservation.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Applied
Sandra Rojas-Lema, Klara Nilsson, Jon Trifol, Maud Langton, Jaume Gomez-Caturla, Rafael Balart, Daniel Garcia-Garcia, Rosana Moriana
Summary: In this study, transparent films were produced from faba bean protein isolate (FBP) reinforced with different cellulose nanocrystals (CNCs) contents, leading to improved mechanical, thermal, barrier, and optical properties. The addition of CNCs enhanced the water resistance of the films, making them more hydrophobic. This advancement could have significant implications for the food packaging industry.
FOOD HYDROCOLLOIDS
(2021)
Article
Biochemistry & Molecular Biology
Cong Cong Qin, Somia Yassin Hussain Abdalkarim, Ming Chen Yang, Yan Juan Dong, Hou-Yong Yu, Dan Ge
Summary: This work develops a sustainable and global strategy to enhance fruit preservation efficacy. The dual-use composite coating or film comprises silk fibroin/cellulose nanocrystals (SF/CNC) with superior ductility through a synergistic plasticizing effect of glycerol and natural aloe-emodin powder (AE) as antimicrobial agents. The SCA-CS coating with antibacterial and antioxidant activities formed an ultrathin layer on the fruit's surfaces with a thickness of 7.7μm and could be easily washable, extending the shelf-life of bananas and strawberries by 9 days and 6 days, respectively.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biochemistry & Molecular Biology
Samira Beikzadeh, Seyede Marzieh Hosseini, Vahid Mofid, Soghra Ramezani, Marjan Ghorbani, Ali Ehsani, Amir Mohammad Mortazavian
Summary: The research successfully fabricated ethylcellulose/polycaprolactone/gelatin nanofibers incorporating Zataria multiflora essential oil and zinc oxide nanoparticles, demonstrating good mechanical, antioxidant, antimicrobial properties and thermal stability.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Multidisciplinary
Cyrine Amara, Ayoub El Mahdi, Raouf Medimagh, Khaoula Khwaldia
Summary: Nanocellulose is a promising bioresource due to its abundance and exceptional properties, making it a versatile material for various industries. Research on NC sources, extraction methods, and applications is essential for the development of sustainable packaging materials. Its outstanding physical and mechanical properties, such as high elastic modulus and gas barrier properties, have led to its increasing use in biomedical, cosmetic, electronics, and food packaging industries.
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
(2021)
Review
Chemistry, Applied
Yanxue Si, Qianqian Lin, Fengshan Zhou, Jianrong Qing, Huize Luo, Chunliang Zhang, Juan Zhang, Ruitao Cha
Summary: Nanocellulose (NC) has garnered significant attention as a green packaging material for its ability to protect food from pathogens and biodegrade after disposal. This review explores various methods of preparing NC-based films, including layer by layer assembly, electrospinning, coating, extrusion, casting, vacuum filtration, and immersion. The article summarizes the interaction between microorganisms and NC, focusing on the impact of NC on microbial adhesion and the influence of microorganisms on the degradation of NC-based films. The challenges of NC in packaging, such as hydrophobicity, antibacterial properties, and industrialization are discussed, along with future perspectives for NC-based films as packaging materials.
CARBOHYDRATE POLYMERS
(2022)
Review
Chemistry, Applied
Patricia Cazon, Manuel Vazquez
Summary: Food packaging plays a crucial role in food preservation and minimizing waste, but the high consumption of non-biodegradable materials has led to challenges in waste management. The search for biodegradable alternatives, such as bacterial cellulose, with unique properties, is gaining interest in the food packaging industry.
FOOD HYDROCOLLOIDS
(2021)
Article
Agricultural Engineering
QiJie Chen, Na You, ChunYan Liang, YiNing Xu, Feng Wang, Bo Zhang, Peng Zhang
Summary: In this study, green composite films were prepared by incorporating ginger essential oil (GEO) Pickering emulsions stabilized by tempo-oxidized cellulose nanocrystals (TOCN) into a starch-based film-forming matrix. The results showed that the composite films exhibited improved antibacterial activity and tensile strength (TS). Moreover, the water vapor permeability of the films decreased by 60.3% and the TS increased by 25.0% when the amount of TOCN was 1.0 wt% and the GEO dosage was 22%.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Biochemistry & Molecular Biology
Mohsen Rashidi, Sepidar Seyyedi Mansour, Parisa Mostashari, Soghra Ramezani, Maryam Mohammadi, Marjan Ghorbani
Summary: A novel bioactive nanofiber was produced using electrospinning technology, with the optimal formulation chosen based on polymer compatibility and performance. Incorporating BOPE increased antioxidant activity and inhibited pathogenic bacteria growth, making the electrospun NFs a beneficial system for improving food safety and quality.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Biochemistry & Molecular Biology
Congnan Cen, Feifei Wang, Yifan Wang, Huan Li, Linglin Fu, Yan Li, Jian Chen, Yanbo Wang
Summary: A novel composite film for food packaging was prepared using hydroxyethyl cellulose (HEC), carboxymethyl chitosan (CMCS), and zinc oxide nanoparticles by solution casting method. Spectroscopy, crystallography, and morphology observation confirmed the successful incorporation of nanoparticles. The addition of CMCS and ZnO improved the solvent resistance (reduced water solubility by 94.3%) and UV shielding ability (increased UV shielding capacity by 45.73%) of the film, enhancing its potential applications in water-rich foods. The composite film demonstrated efficient inhibition (>99.99% inhibition rate) of pathogenic bacteria Listeria monocytogenes and Pseudomonas aeruginosa, with the synergistic effect of CMCS and ZnO. Furthermore, CMCS and ZnO significantly enhanced the elasticity (494.34% improvement) and maximum load capacity (142.24% improvement) of the composite film.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
A. Khallouqi, A. Halimi, O. El Rhazouani
Summary: A pediatric head phantom made of epoxy resin was used to evaluate radiation exposure in CT scans. The phantom demonstrated dosimetric properties comparable to commercially available phantoms, making it a practical and economical option for assessing radiation dose in children.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Chemistry, Physical
M. Y. Shoeib, Doaa A. Ahmed, A. F. Abd-Elraheem
Summary: The research aims to measure and analyze the levels of radon concentration, radium concentration, and radon exhalation rates in geopolymer cement mixes, and assess their impact on indoor air quality. Results indicate that geopolymer cement materials are safe for use in construction, except for specific mixes.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Chemistry, Physical
M. J. Leotlela
Summary: This article presents the results of radiochemical events/processes that occur when water is exposed to ionising radiation of charged particles (beta and alpha-particles). The idea of cogeneration becomes even more lucrative if we consider that hydrogen energy generation is clean (also known as green energy) because of its insignificant contribution to environmental pollution. These results supplement the fluctuation in effective dose theory/hypothesis of a previous study on time-dependent variations in the radiological health impact of an interim SNFS facility presented in 2021 (Leotlela, 2021).
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Chemistry, Physical
Vyacheslav Ivanovich Pavlenko, Roman Vladimirovich Sidelnikov, Vitaly Valerievich Kashibadze, Mikhail Igorevich Dobynde, Dmitry Alexandrovich Kartashov, Vyacheslav Alexandrovich Shurshakov
Summary: This work explores the possibility of using a polymer composite to protect against neutron radiation in space conditions. The study shows that the proposed polymer composite has high structural properties necessary for use in space. Monte Carlo simulation is used to evaluate the neutron radiation passage through the material. The results demonstrate that the protective layer made of the polymer composite is thinner and more suitable for spacecraft, which is crucial due to limited space on board.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Chemistry, Physical
Islam G. Alhindawy, M. I. Sayyed, Dalal Abdullah Aloraini, Aljawhara H. Almuqrin, Mohammad S. Alomar, Gaber A. Elawadi, K. A. Mahmoud
Summary: This study investigated the effects of Neodymium (III) nitrate hexahydrate and lanthanum nitrate hexahydrate on the structural and radiation shielding properties of zircon mineral, and a new La/Nb-doped ZrO2 nanocomposite was fabricated. Experimental techniques such as energy-dispersive X-ray, scanning electron microscope, transmission electron microscopy, and X-ray diffraction pattern were used to analyze the structure and composition of the fabricated nanocomposites. Monte Carlo simulation was employed to evaluate the gamma-ray shielding properties. The results showed that the fabricated composites had good shielding characteristics, with a shielding capacity of 30-50% compared to pure lead in the intermediate energy range of 0.244-2.506 MeV.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Chemistry, Physical
Hassan Salah, Mohammed Alkhorayef, Layal Jambi, Mohammed Almuwanis, Abdelmoneim Sulieman
Summary: Cardiovascular nuclear medicine imaging examinations expose patients to high doses of ionizing radiation. This study assessed the radiation doses and public exposure in cardiac rest and stress SPECT scans. The effective dose from cardiac stress was higher than previous studies, which may be influenced by clinical indication imaging protocols and radiation safety measures.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Chemistry, Physical
Leandro Barbosa da Silveira Gatto, Delson Braz, Leonardo Pacifico, Paulo Travassos, Luis Alexandre Goncalves Magalhaes
Summary: This study evaluated the mean glandular dose (MGD) in mammography using a computed radiography (CR) system with a solid-state detector. Irradiations and simulations were conducted to determine the MGD and spectra for the same conditions. The results showed that the glandular dose was below the acceptable levels and the spectra were mostly in accordance with the literature.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Chemistry, Physical
Mawya Khafaji, Rashid Barnawi, Salma Amoudi, Hassan Gabbani, Rayan Alhazmi, Rayan Ahyad, Khalid Alsafi, Khuld Saeedi, Hassan Salah, Nissren Tamam, David Bradley, Sarah Albahiti, Abdelmoneim Sulieman
Summary: This study aimed to calculate typical values for common pediatric studies at King Abdulaziz University Hospital and compare them with other studies. The results showed that radiation dose levels in pediatric CT examinations were generally lower compared to other studies.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Chemistry, Physical
Faisal Almisned, Iskender Akkurt, Nurdan Karpuz
Summary: In this study, cross sections of medical radioisotopes were calculated using level density models. The results were compared with experimental data and it was found that the GSM level density models generally yielded consistent conclusions.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Chemistry, Physical
Shokufeh Saeid, Neda Mollakhalili-meybodi, Fateme Akrami Mohajeri, Farzan Madadizadeh, Elham Khalili Sadrabad
Summary: This study found that gamma irradiation significantly reduces the saponin and phytic acid content of quinoa. At a dose of 2.5 kGy, it can effectively reduce saponin and phytic acid without significantly damaging the antioxidant compounds.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Chemistry, Physical
Maria Demeter, Ion Calina, Anca Scarisoreanu, Valentina Mitran, Marcela Popa, Anisoara Cimpean, Mariana Carmen Chifiriuc, Marin Micutz, Elena Matei, Bogdana Mitu
Summary: Novel biocompatible composite hydrogels with good elastic and antimicrobial properties were synthesized by e-beam cross-linking using chitosan, water-soluble polymers, and silver nanoparticles (AgNP). The composite hydrogels showed high stability, absorption capability specific to infected wounds, and biocompatibility. The antimicrobial activity was influenced by the amount of AgNP and cross-linking degree, with significant inhibition against Gram-negative bacteria.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Chemistry, Physical
Anuor AT. Ayoub, Yushou Song, Mamoun IA. Sagiroun
Summary: This paper presents an assessment of the radiological hazard for humans from nuclear power plant effluent released into a river under normal operation scenarios. The study concludes that the radiological hazard from this effluent is minimal and within acceptable limits according to international standards. It also highlights the potential hazards related to the higher concentration of 137Cs in sediments over time.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Chemistry, Physical
Irabati Chakraborty, Nidhi Sinha, Bobby Antony
Summary: This article investigates the electron impact ionization of prebiotic molecules within the interstellar medium. By calculating the electron impact ionization cross section, the study provides insights into the chemistry of these molecules and their interaction with electrons, which play a vital role in the emergence of life's essential building blocks.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Chemistry, Physical
C. V. Vishnu, Antony Joseph
Summary: This study investigated the gamma-ray shielding properties of composite materials made from natural rubber with different proportions of Barium Tungstate. The addition of Barium Tungstate significantly improved the characteristics of gamma radiation shielding. The experimental measurements showed good agreement with theoretical calculations obtained from simulation results.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Chemistry, Physical
Derya Mutlu, Idris Karagoz, Harun Sepetcioglu, Urkiye Akar Tarim, Orhan Gurler
Summary: This study examined the properties of epoxy composites with dendritic copper particles and found that the addition of copper particles improved the electrical conductivity and mechanical properties of the composites. The glass transition temperature of the composites could be adjusted by varying the copper particle ratio. The study also evaluated the shielding properties of epoxy-based composites against gamma radiation and found that the addition of copper particles significantly altered the microstructure and mechanical properties of the composites.
RADIATION PHYSICS AND CHEMISTRY
(2024)