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Huang H, Wu RS, Lin M, Xu S. Emerging Wearable Ultrasound Technology. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2024; 71:713-729. [PMID: 37878424 PMCID: PMC11263711 DOI: 10.1109/tuffc.2023.3327143] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
This perspective article provides a brief overview on materials, fabrications, beamforming, and applications for wearable ultrasound devices, a rapidly growing field with versatile implications. Recent developments in miniaturization and soft electronics have significantly advanced wearable ultrasound devices. Such devices offer distinctive advantages over traditional ultrasound probes, including prolonged usability and operator independence, and have demonstrated their effectiveness in continuous monitoring, noninvasive therapies, and advanced human-machine interfaces. Wearable ultrasound devices can be classified into three main categories: rigid, flexible, and stretchable, each having distinctive properties and fabrication strategies. Key unique strategies in device design, packaging, and beamforming for each type of wearable ultrasound devices are reviewed. Furthermore, we highlight the latest applications enabled by wearable ultrasound technology in various areas. This article concludes by discussing the outstanding challenges within the field and outlines potential pathways for future advancements.
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Venkatesan R, Alagumalai K, Vetcher AA, Al-Asbahi BA, Kim SC. Eco-Friendly Poly (Butylene Adipate- co-Terephthalate) Coated Bi-Layered Films: An Approach to Enhance Mechanical and Barrier Properties. Polymers (Basel) 2024; 16:1283. [PMID: 38732752 PMCID: PMC11085390 DOI: 10.3390/polym16091283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 04/29/2024] [Accepted: 05/01/2024] [Indexed: 05/13/2024] Open
Abstract
In this research work, a coated paper was prepared with poly (butylene adipate-co-terephthalate) (PBAT) film to explore its use in eco-friendly food packaging. The paper was coated with PBAT film for packaging using hot pressing, a production method currently employed in the packaging industry. The coated papers were evaluated for their structural, mechanical, thermal, and barrier properties. The structural morphology and chemical analysis of the coated paper confirmed the consistent formation of PBAT bi-layered on paper surfaces. Surface coating with PBAT film increased the water resistance of the paper samples, as demonstrated by tests of barrier characteristics, including the water vapor transmission rate (WVTR), oxygen transmission rate (OTR), and water contact angle (WCA) of water drops. The transmission rate of the clean paper was 2010.40 cc m-2 per 24 h for OTR and 110.24 g m-2 per 24 h for WVTR. If the PBAT-film was coated, the value decreased to 91.79 g m-2 per 24 h and 992.86 cc m-2 per 24 h. The hydrophobic nature of PBAT, confirmed by WCA measurements, contributed to the enhanced water resistance of PBAT-coated paper. This result presents an improved PBAT-coated paper material, eliminating the need for adhesives and allowing for the fabrication of bi-layered packaging.
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Affiliation(s)
- Raja Venkatesan
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea;
| | - Krishnapandi Alagumalai
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea;
| | - Alexandre A. Vetcher
- Institute of Biochemical Technology and Nanotechnology, Peoples’ Friendship University of Russia n.a. P. Lumumba (RUDN), 6 Miklukho-Maklaya St., 117198 Moscow, Russia;
| | - Bandar Ali Al-Asbahi
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;
| | - Seong-Cheol Kim
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea;
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Roy S, Ghosh T, Zhang W, Rhim JW. Recent progress in PBAT-based films and food packaging applications: A mini-review. Food Chem 2024; 437:137822. [PMID: 37897823 DOI: 10.1016/j.foodchem.2023.137822] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 09/18/2023] [Accepted: 10/18/2023] [Indexed: 10/30/2023]
Abstract
Bioplastics are a promising alternative to non-biodegradable plastics. One of these bioplastics, PBAT (polybutylene adipate co-terephthalate), is a polyester-based bioplastic commonly used to manufacture flexible packaging films. PBAT-based films have high flexibility but relatively low strength compared to other bioplastics. The strength of PBAT films can be improved by blending them with other fillers/polymers. Additionally, the functionality of PBAT films can be enhanced by incorporating bioactive functional fillers. The physical and functional properties of PBAT films produced by adding active ingredients provide functionality and are a good alternative to non-degradable petrochemical-based plastics. The PBAT-based functional films protect food and improve packaged foods' quality and life span. Thus, this review provides recent advances in PBAT-based films and their use in active food packaging applications. After briefly describing the different fabrication methods of PBAT films, various important physical and functional properties and biodegradability are comprehensively discussed. PBAT-based active packaging film in real-time food packaging is also briefly covered. Through this review, more attention is expected to be focused on research on PBAT-based biodegradable active food packaging.
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Affiliation(s)
- Swarup Roy
- Department of Food Technology and Nutrition, School of Agriculture, Lovely Professional University, Phagwara, Punjab 144411, India.
| | - Tabli Ghosh
- Department of Food Engineering and Technology, Tezpur University, Tezpur, Assam 784028, India
| | - Wanli Zhang
- School of Food Science and Engineering, Hainan University, Haikou 570228, PR China
| | - Jong-Whan Rhim
- Department of Food and Nutrition, BioNanocomposite Research Center, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea.
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Noorizadeh M, Geetha M, Bensaali F, Meskin N, Sadasivuni KK, Zughaier SM, Elgamal M, Ait Hssain A. A Path towards Timely VAP Diagnosis: Proof-of-Concept Study on Pyocyanin Sensing with Cu-Mg Doped Graphene Oxide. BIOSENSORS 2024; 14:48. [PMID: 38248425 PMCID: PMC11154305 DOI: 10.3390/bios14010048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 01/09/2024] [Accepted: 01/13/2024] [Indexed: 01/23/2024]
Abstract
In response to the urgent requirement for rapid, precise, and cost-effective detection in intensive care units (ICUs) for ventilated patients, as well as the need to overcome the limitations of traditional detection methods, researchers have turned their attention towards advancing novel technologies. Among these, biosensors have emerged as a reliable platform for achieving accurate and early diagnoses. In this study, we explore the possibility of using Pyocyanin analysis for early detection of pathogens in ventilator-associated pneumonia (VAP) and lower respiratory tract infections in ventilated patients. To achieve this, we developed an electrochemical sensor utilizing a graphene oxide-copper oxide-doped MgO (GO - Cu - Mgo) (GCM) catalyst for Pyocyanin detection. Pyocyanin is a virulence factor in the phenazine group that is produced by Pseudomonas aeruginosa strains, leading to infections such as pneumonia, urinary tract infections, and cystic fibrosis. We additionally investigated the use of DNA aptamers for detecting Pyocyanin as a biomarker of Pseudomonas aeruginosa, a common causative agent of VAP. The results of this study indicated that electrochemical detection of Pyocyanin using a GCM catalyst shows promising potential for various applications, including clinical diagnostics and drug discovery.
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Affiliation(s)
- Mohammad Noorizadeh
- Department of Electrical Engineering, College of Engineering, Qatar University, Doha 2713, Qatar;
| | - Mithra Geetha
- Department of Mechanical and Industrial Engineering, Centre for Advanced Materials, Qatar University, Doha 2713, Qatar; (M.G.); (K.K.S.)
| | - Faycal Bensaali
- Department of Electrical Engineering, College of Engineering, Qatar University, Doha 2713, Qatar;
| | - Nader Meskin
- Department of Electrical Engineering, College of Engineering, Qatar University, Doha 2713, Qatar;
| | - Kishor K. Sadasivuni
- Department of Mechanical and Industrial Engineering, Centre for Advanced Materials, Qatar University, Doha 2713, Qatar; (M.G.); (K.K.S.)
| | - Susu M. Zughaier
- College of Medicine, QU Health, Qatar University, Doha 2713, Qatar; (S.M.Z.); (M.E.)
| | - Mahmoud Elgamal
- College of Medicine, QU Health, Qatar University, Doha 2713, Qatar; (S.M.Z.); (M.E.)
| | - Ali Ait Hssain
- Medical Intensive Care Unit, Hamad Medical Corporation, Doha 3050, Qatar;
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Nguyen Q, Le DV, Phan AN, Nguyen VD. Synthesis of Biodegradable and Antimicrobial Nanocomposite Films Reinforced for Coffee and Agri-Food Product Preservation. ACS OMEGA 2023; 8:42177-42185. [PMID: 38024691 PMCID: PMC10652363 DOI: 10.1021/acsomega.3c04017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 09/12/2023] [Accepted: 10/12/2023] [Indexed: 12/01/2023]
Abstract
The antimicrobial activity of silver nanoparticles is widely known. However, their application to biodegradable polymeric materials is still limited. In this work, we report a strategy involving the green synthesis of nanocomposite films based on a natural biodegradable matrix. Nanometer-sized silver nanoparticles (C-AgNPs) were synthesized with the aid of ultrasound waves between the silver nitrate solution and the nanocurcumin solution. The green synthesized C-AgNPs were found to have particle sizes in the range of 5-25 nm and demonstrated good antimicrobial activity against Clostridium perfringens, Staphylococcus aureus, Bacillus subtilis, Macrophoma theicola, and Aspergillus flavus. Owing to their physical-chemical and mechanical properties and the excellent antimicrobial activities, the obtained AgNPs were used together with chitosan, cassava starch, and poly(vinyl alcohol) (PVA) to make nanocomposite films, which are suitable for the packaging requirements of various key agricultural and food products such as coffee beans, bamboo straws, and fruits. The nanocomposite films lost up to 85% of their weight after being buried in the soil for 120 days. This indicates that the films made with natural biodegradable materials are environmentally friendly.
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Affiliation(s)
- Quang
Lich Nguyen
- School
of Engineering and Technology, Hue University, Hue City 530000, Vietnam
| | - Dai Vuong Le
- School
of Engineering and Technology, Hue University, Hue City 530000, Vietnam
| | - Anh N. Phan
- School
of Engineering, Chemical Engineering, Newcastle
University, Newcastle
upon Tyne NE1 7RU, U.K.
| | - Van Duy Nguyen
- School
of Engineering, Chemical Engineering, Newcastle
University, Newcastle
upon Tyne NE1 7RU, U.K.
- Institute
of Biotechnology and Environment, Nha Trang
University, Nha Trang 650000, Khanh Hoa, Vietnam
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Venkatesan R, Alagumalai K, Kim SC. Preparation and Antimicrobial Characterization of Poly(butylene adipate- co-terephthalate)/Kaolin Clay Biocomposites. Polymers (Basel) 2023; 15:polym15071710. [PMID: 37050324 PMCID: PMC10097211 DOI: 10.3390/polym15071710] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/15/2023] [Accepted: 03/27/2023] [Indexed: 04/14/2023] Open
Abstract
The biodegradable polymer poly(butylene adipate-co-terephthalate) (PBAT) starts decomposing at room temperature. Kaolin clay (KO) was dispersed and blended into PBAT composites using a solution-casting method. Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to evaluate the structure and morphology of the composite materials. PBAT/kaolin clay composites were studied by thermogravimetric analysis (TGA). The PBAT composite loaded with 5.0 wt% kaolin clay shows the best characteristics. The biocomposites of PBAT/kaolin [PBC-5.0 (37.6MPa)] have a good tensile strength when compared to virgin PBAT (18.3MPa). The oxygen transmission rate (OTR), with ranges from 1080.2 to 311.7 (cc/m2/day), leads the KO content. By including 5.0 wt% kaolin 43.5 (g/m2/day), the water vapor transmission rate (WVTR) of the PBAT/kaolin composites was decreased. The pure PBAT must have a WVTR of 152.4 (g/m2/day). Gram-positive (S. aureus) and Gram-negative (E. coli) food-borne bacteria are significantly more resistant to the antimicrobial property of composites. The results show that PBAT/kaolin composites have great potential as food packaging materials due to their ability to decrease the growth of bacteria and improve the shelf life of packaged foods.
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Affiliation(s)
- Raja Venkatesan
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | | | - Seong-Cheol Kim
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
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