1
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Yuan Z, Shi X, Chen K. Preparation and characterization of chitosan/ZnO-Ag composite microcapsules and their applications in solar energy harvesting and electromagnetic interference shielding. Int J Biol Macromol 2024; 263:130285. [PMID: 38373571 DOI: 10.1016/j.ijbiomac.2024.130285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 01/18/2024] [Accepted: 02/16/2024] [Indexed: 02/21/2024]
Abstract
Phase change microcapsules are known for their latent heat storage capability. However, the efficient absorption and utilization of solar energy by these microcapsules remains a significant challenge. In this study, we successfully prepared composite phase change microcapsules containing ZnO-Ag nanospheres, chitosan, and paraffin. These microcapsules demonstrated remarkable photothermal conversion efficiency. ZnO was found to effectively absorb ultraviolet light, while the plasmonic resonance of Ag was utilized to absorb and make use of light energy in the visible region. Moreover, due to the synergistic absorption and reflection of electromagnetic waves by ZnO-Ag nanoparticles and graphene, the well-dispersed chitosan/ZnO-Ag composite microcapsules and graphene in the fabric coating demonstrated exceptional electromagnetic shielding performance. In addition, the coated fabric based on composite microcapsules exhibited excellent antibacterial properties, effectively inhibiting the growth of bacteria such as S. aureus and E. coli. This antibacterial performance adds to their potential applications in various fields. These multifunctional phase change microcapsules offer vast potential for the effective utilization of solar energy, serving as efficient photothermal conversion and energy storage materials.
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Affiliation(s)
- Zhonghua Yuan
- Key Laboratory of Eco-Textile, Ministry of Education, College of Textile Science and Engineering, Jiangnan University, Wuxi 214122, China
| | - Xuan Shi
- Key Laboratory of Eco-Textile, Ministry of Education, College of Textile Science and Engineering, Jiangnan University, Wuxi 214122, China
| | - Kunlin Chen
- Key Laboratory of Eco-Textile, Ministry of Education, College of Textile Science and Engineering, Jiangnan University, Wuxi 214122, China.
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2
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Paswan M, Singh Chandel AK, Malek NI, Dholakiya BZ. Preparation of sodium alginate/Cur-PLA hydrogel beads for curcumin encapsulation. Int J Biol Macromol 2024; 254:128005. [PMID: 37949275 DOI: 10.1016/j.ijbiomac.2023.128005] [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: 08/08/2023] [Revised: 10/31/2023] [Accepted: 11/07/2023] [Indexed: 11/12/2023]
Abstract
The low bioavailability of hydrophobic compounds, however, limits their medicinal use. Hydrogel beads made of biopolymers can be employed as controlled delivery systems and as a carrier to carry curcumin molecules. In this study, encapsulation of curcumin is done within the hydrogel by using Polylactic acid. The prepared SA/Cur-PLA and SA/Cur beads were examined using FTIR, SEM, TGA, NMR, and, XRD to study the interaction between drug and polymer. The developed bead's curcumin encapsulation efficiency was found to be 81.47 % in SA/Cur-PLA. Curcumin's release kinetics have been studied in systems (SGF, pH 1.2, and SCF, pH 7.4) that simulate oral consumption, which possess good pH sensitivity. The in vitro drug release studies of SA/Cur-PLA beads suggest that the curcumin release was significantly increased in a controlled manner and within 12 h, the cumulative release of curcumin was accomplished. In vitro hemolysis study shows a 7.93 % hemolysis rate which suggests that the produced bead is hemocompatible. For SA/Cur-PLA and SA/Cur, cytotoxicity evaluation and antimicrobial study was performed. Results show that both hydrogels are cytocompatible and antimicrobial in nature. It was found that biopolymer-based hydrogel beads enhanced the bioavailability of curcumin, antioxidant, biodegradable, and considered an effective carrier for the oral delivery of several hydrophobic nutraceuticals.
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Affiliation(s)
- Meenakshi Paswan
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat 395007, Gujarat, India
| | - Arvind K Singh Chandel
- Center for Disease Biology and Integrative Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Naved I Malek
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat 395007, Gujarat, India
| | - Bharatkumar Z Dholakiya
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat 395007, Gujarat, India.
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3
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Jiang Y, Wang J, Sun D, Liu Z, Qi L, Du M, Wang J, Li Y, Zhu C, Huang Y, Song Y, Liu L, Feng G, Zhang L. A hydrogel reservoir as a self-contained nucleus pulposus cell delivery vehicle for immunoregulation and repair of degenerated intervertebral disc. Acta Biomater 2023; 170:303-317. [PMID: 37597680 DOI: 10.1016/j.actbio.2023.08.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 08/10/2023] [Accepted: 08/11/2023] [Indexed: 08/21/2023]
Abstract
The strategies for modulating the local inflammatory microenvironment to inhibit intervertebral disc degeneration (IVDD) have garnered significant interest in recent years. In this study, we developed a "self-contained" injectable hydrogel capable of storing Mg2+ while carrying nucleus pulposus (NP) cells, with the aim of inhibiting IVDD through immunoregulation. The hydrogel consists of sodium alginate (SA), poly(N-isopropylacrylamide) (PNIPAAm), silicate ceramics (SC), and NP cells. When injected into the NP site, PNIPAAm gelates instantly under body temperature, forming an interpenetrating network (IPN) hydrogel with SA. Ca2+ released from the SC can crosslink the SA in situ, forming a SA/PNIPAAm hydrogel with an interpenetrating network (IPN) encapsulating the NP cells. Moreover, inside the hydrogel, Mg2+ released from SC are effectively encapsulated and maintained at a desirable concentration. These Mg2+ facilitates the local cell matrix synthesis and promotes immunomodulation (upregulating M2 / downregulating M1 macrophage polarization), thus inhibiting the IVDD progression. The proposed hydrogel has biocompatibility and is shown to enhance the expression of collagen II (COL II) and aggrecan. The potential of the injectable hydrogel in IVD repair has also been successfully demonstrated by in vivo studies. STATEMENT OF SIGNIFICANCE.
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Affiliation(s)
- Yulin Jiang
- Analytical & Testing Center, Department of Orthopedic Surgery, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Juehan Wang
- Analytical & Testing Center, Department of Orthopedic Surgery, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Dan Sun
- Advanced Composite Research Group (ACRG), School of Mechanical and Aerospace Engineering, Queen's University Belfast, BT9 5AH, UK
| | - Zheng Liu
- Analytical & Testing Center, Department of Orthopedic Surgery, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Lin Qi
- Analytical & Testing Center, Department of Orthopedic Surgery, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Meixuan Du
- Analytical & Testing Center, Department of Orthopedic Surgery, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Jing Wang
- Analytical & Testing Center, Department of Orthopedic Surgery, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Yubao Li
- Analytical & Testing Center, Department of Orthopedic Surgery, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Ce Zhu
- Analytical & Testing Center, Department of Orthopedic Surgery, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Yong Huang
- Analytical & Testing Center, Department of Orthopedic Surgery, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Yueming Song
- Analytical & Testing Center, Department of Orthopedic Surgery, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Limin Liu
- Analytical & Testing Center, Department of Orthopedic Surgery, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Ganjun Feng
- Analytical & Testing Center, Department of Orthopedic Surgery, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Li Zhang
- Analytical & Testing Center, Department of Orthopedic Surgery, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China.
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4
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Wang S, Zhang P, Li Y, Li J, Li X, Yang J, Ji M, Li F, Zhang C. Recent advances and future challenges of the starch-based bio-composites for engineering applications. Carbohydr Polym 2023; 307:120627. [PMID: 36781278 DOI: 10.1016/j.carbpol.2023.120627] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 01/30/2023]
Abstract
Starch is regarded as one of the most promising sustainable materials due to its abundant yield and excellent biodegradability. From the perspective of practical engineering applications, this paper systematically describes the development of starch-based bio-composites in the past decade. Packaging properties, processing characteristics, and current challenges for the efficient processing of starch-based bio-composites are reviewed in industrial packaging. Green coatings, binders, adsorbents, flocculants, flame retardants, and emulsifiers are used as examples to illustrate the versatility of starch-based bio-composites in chemical agent applications. In addition, the work compares the application of starch-based bio-composites in conventional spinning with emerging spinning technologies and describes the challenges of electrostatic spinning for preparing nanoscale starch-based fibers. In terms of flexible electronics, the starch-based bio-composites are regard as a solid polymer electrolyte and easily modified porous material. Moreover, we describe the applications of the starch-based gels in tissue engineering, controlled drug release, and medical dressings. Finally, the theoretical input and technical guidance in the advanced sustainable engineering application of the starch-based bio-composites are provided in the work.
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Affiliation(s)
- Shen Wang
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
| | - Pengfei Zhang
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
| | - Yanhui Li
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
| | - Junru Li
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
| | - Xinlin Li
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
| | - Jihua Yang
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
| | - Maocheng Ji
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture (M of E), School of Mechanical Engineering, Shandong University, Jinan 250061, China
| | - Fangyi Li
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture (M of E), School of Mechanical Engineering, Shandong University, Jinan 250061, China
| | - Chuanwei Zhang
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China.
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5
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Saberi Riseh R, Hassanisaadi M, Vatankhah M, Soroush F, Varma RS. Nano/microencapsulation of plant biocontrol agents by chitosan, alginate, and other important biopolymers as a novel strategy for alleviating plant biotic stresses. Int J Biol Macromol 2022; 222:1589-1604. [DOI: 10.1016/j.ijbiomac.2022.09.278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 09/19/2022] [Accepted: 09/28/2022] [Indexed: 11/05/2022]
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6
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Mohammad Gholiha H, Ehsani M, Saeidi A, Ghadami A. Albumin-loaded thermo/pH dual-responsive nanogels based on sodium alginate and poly (N-vinyl caprolactam). Prog Biomater 2022; 12:41-49. [PMID: 36445685 PMCID: PMC9958215 DOI: 10.1007/s40204-022-00211-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Accepted: 11/03/2022] [Indexed: 11/30/2022] Open
Abstract
During the past decades, many researchers have tried to encapsulate medicines in biopolymer nanogels as injectable medicines. In the present study, dual-responsive bovine serum albumin (BSA)-loaded nanogels prepared from sodium alginate grafted poly (N-vinyl caprolactam) (PNVCL) have been reported. First, PNVCL-g-sodium alginate (PNVCL-g-Alg) was synthesized through free radical polymerization, and then nanogels were obtained from ionic crosslinking of sodium alginate in the presence of BSA. FTIR spectra showed that PNVCL-g-Alg nanogels were successfully prepared. Turbidimetry and rheometry analyses demonstrated the cloud point temperature near the human body. Particle size was evaluated using FE-SEM and dynamic light scattering and it was found that the size of particles in dry and swollen state are about 30 and 280 nm, respectively. The effect of temperature and pH on BSA release was evaluated. By comparing the drug release behavior, we found that the release of the protein at the temperature above the cloud point is faster than that at the temperature below the cloud point. The pH sensitivity of BSA-loaded PNVCL-g-Alg was evaluated at pH 5.5 and 7.4 and showed that the drug release was faster at acidic pH than at neutral pH.
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Affiliation(s)
- Hamed Mohammad Gholiha
- grid.411463.50000 0001 0706 2472Department of Polymer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran ,grid.459642.80000 0004 0382 9404Department of Resin and Additives, Institute for Color Science and Technology, Tehran, Iran
| | - Morteza Ehsani
- Department of Polymer Processing, Iran Polymer and Petrochemical Institute (IPPI), Tehran, Iran. .,Department of Polymer Engineering, Faculty of Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran.
| | - Ardeshir Saeidi
- grid.411463.50000 0001 0706 2472Department of Polymer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Azam Ghadami
- grid.411463.50000 0001 0706 2472Department of Chemical and Polymer Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran
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7
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Feng J, Dou J, Wu W. Development of biochar-impregnated alginate beads for the delivery of biocontrol agents for peanut aflatoxin. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2022; 39:1487-1500. [PMID: 35679201 DOI: 10.1080/19440049.2022.2085888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The competitive inhibition of aflatoxigenic fungi by non-aflatoxigenic Aspergillus flavus has proved to be an effective method to prevent and control peanut aflatoxin contamination, and most of the currently used inoculum carriers are grains. In this study, the reliability and efficiency of replacing grain kernels with novel chitosan-coated alginate-poly(N-isopropylacrylamide) (PNIPAAm) beads impregnated with biochar (CSACB) were evaluated. Characterisation of the beads was performed by SEM, thermogravimetry analysis (TGA), and swelling properties analyses. The optimised CSACB beads had good physical stability, shelf life, and entrapment efficiency. In addition, the water-holding capacity and porous structure were excellent, as the biochar provided a beneficial microenvironment for the attachment and microbial growth of the biocontrol fungus. The effect of reducing aflatoxin in peanuts was verified experimentally. Collectively, the novel CSACB beads are suitable carriers of non-aflatoxigenic A. flavus for the biocontrol of peanut aflatoxin.
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Affiliation(s)
- Jiachang Feng
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Jianpeng Dou
- Department of Biological and Agricultural Engineering, Jilin University, Changchun, China
| | - Wenfu Wu
- Department of Biological and Agricultural Engineering, Jilin University, Changchun, China
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8
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Jiang Y, Wang J, Wang J, Zhuang Y, Qi L, Feng G, Zhang L. Fabrication of novel
PNIPAM
@
GO
microspheres loaded with dual drugs featuring on‐demand drug release capability. J Appl Polym Sci 2022. [DOI: 10.1002/app.52444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yulin Jiang
- Analytical & Testing Center and Department of Orthopedic Surgery Sichuan University Chengdu China
| | - Jing Wang
- Analytical & Testing Center and Department of Orthopedic Surgery Sichuan University Chengdu China
| | - Juehan Wang
- Analytical & Testing Center and Department of Orthopedic Surgery Sichuan University Chengdu China
| | - Yi Zhuang
- Analytical & Testing Center and Department of Orthopedic Surgery Sichuan University Chengdu China
| | - Lin Qi
- Analytical & Testing Center and Department of Orthopedic Surgery Sichuan University Chengdu China
| | - Ganjun Feng
- Analytical & Testing Center and Department of Orthopedic Surgery Sichuan University Chengdu China
| | - Li Zhang
- Analytical & Testing Center and Department of Orthopedic Surgery Sichuan University Chengdu China
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9
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Stengelin E, Nzigou Mombo B, Mondeshki M, Beltramo GL, Lange MA, Schmidt P, Frerichs H, Wegner SV, Seiffert S. Rational Design of Thermoresponsive Microgel Templates with Polydopamine Surface Coating for Microtissue Applications. Macromol Biosci 2021; 21:e2100209. [PMID: 34342150 DOI: 10.1002/mabi.202100209] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 07/09/2021] [Indexed: 12/18/2022]
Abstract
Functional microgels provide a versatile basis for synthetic in vitro platforms as alternatives to animal experiments. The tuning of the physical, chemical, and biological properties of synthetic microgels can be achieved by blending suitable polymers and formulating them such to reflect the heterogenous and complex nature of biological tissues. Based on this premise, this paper introduces the development of volume-switchable core-shell microgels as 3D templates to enable cell growth for microtissue applications, using a systematic approach to tune the microgel properties based on a deep conceptual and practical understanding. Microscopic microgel design, such as the tailoring of the microgel size and spherical shape, is achieved by droplet-based microfluidics, while on a nanoscopic scale, a thermoresponsive polymer basis, poly(N-isopropylacrylamide) (PNIPAAm), is used to provide the microgel volume switchability. Since PNIPAAm has only limited cell-growth promoting properties, the cell adhesion on the microgel is further improved by surface modification with polydopamine, which only slightly affects the microgel properties, thereby simplifying the system. To further tune the microgel thermoresponsiveness, different amounts of N-hydroxyethylacrylamide are incorporated into the PNIPAAm network. In a final step, cell growth on the microgel surface is investigated, both at a single microgel platform and in spheroidal cell structures.
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Affiliation(s)
- Elena Stengelin
- Department of Chemistry, Johannes Gutenberg-University Mainz, Mainz, D-55128, Germany
| | - Brice Nzigou Mombo
- Institute of Physiological Chemistry and Pathobiochemistry, Westfälische Wilhelms-University Münster, Münster, D-48149, Germany
| | - Mihail Mondeshki
- Department of Chemistry, Johannes Gutenberg-University Mainz, Mainz, D-55128, Germany
| | - Guillermo L Beltramo
- Institute of Biological Information Processing 2 (IBI-2), Forschungszentrum Jülich GmbH, Jülich, D-52428, Germany
| | - Martin A Lange
- Department of Chemistry, Johannes Gutenberg-University Mainz, Mainz, D-55128, Germany
| | - Patrick Schmidt
- Department of Chemistry, Johannes Gutenberg-University Mainz, Mainz, D-55128, Germany
| | - Hajo Frerichs
- Department of Chemistry, Johannes Gutenberg-University Mainz, Mainz, D-55128, Germany
| | - Serafine V Wegner
- Institute of Physiological Chemistry and Pathobiochemistry, Westfälische Wilhelms-University Münster, Münster, D-48149, Germany
| | - Sebastian Seiffert
- Department of Chemistry, Johannes Gutenberg-University Mainz, Mainz, D-55128, Germany
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10
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Pinto L, Bonifacio MA, De Giglio E, Santovito E, Cometa S, Bevilacqua A, Baruzzi F. Biopolymer hybrid materials: Development, characterization, and food packaging applications. Food Packag Shelf Life 2021. [DOI: 10.1016/j.fpsl.2021.100676] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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11
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Lee MJ, Park SY, Sung AY. Characterization of Biocompatible Hydrogel Lenses Using Methacrylic Acid with Neodymium Oxide Nanoparticles. Polymers (Basel) 2021; 13:polym13101575. [PMID: 34069015 PMCID: PMC8156141 DOI: 10.3390/polym13101575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 11/16/2022] Open
Abstract
We prepared hydrogel contact lenses containing nanoparticles of neodymium oxide and methacrylic acid (MA) to investigate their effect on the physical and chemical properties of the lens. Neodymium oxide nanoparticles improved the tensile strength without affecting wettability. The tensile strength, wettability, and light transmittance were all increased when MA was added in a specific ratio. To confirm the safety of the newly used nanoparticles, test on absorbance, eluate, and pH change were conducted and it was found that the safety level was satisfactory. In conclusion, it was confirmed that durable contact lenses can be manufactured with neodymium oxide nanoparticles, and most of the basic elements of the lens such as transparency, strength, and wettability could be improved using MA, which is a hydrophilic material. It is believed that the study will be helpful as part of basic research to use new materials.
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Affiliation(s)
- Min-Jae Lee
- Department of Optometry, Jeju Tourism University, Jeju 63063, Korea;
| | - Seon-Young Park
- Department of Optometry & Vision Science, Daegu Catholic University, Gyeongsan 38430, Korea;
| | - A-Young Sung
- Department of Optometry & Vision Science, Daegu Catholic University, Gyeongsan 38430, Korea;
- Correspondence:
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12
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Tailoring Alginate/Chitosan Microparticles Loaded with Chemical and Biological Agents for Agricultural Application and Production of Value-Added Foods. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11094061] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This work reviews the recent development of biopolymer-based delivery systems for agricultural application. Encapsulation into biopolymer microparticles ensures the protection and targeted delivery of active agents while offering controlled release with higher efficiency and environmental safety for ecological and sustainable plant production. Encapsulation of biological agents provides protection and increases its survivability while providing an environment safe for growth. The application of microparticles loaded with chemical and biological agents presents an innovative way to stimulate plant metabolites synthesis. This enhances plants’ defense against pests and pathogens and results in the production of higher quality food (i.e., higher plant metabolites share). Ionic gelation was presented as a sustainable method in developing biopolymeric microparticles based on the next-generation biopolymers alginate and chitosan. Furthermore, this review highlights the advantages and disadvantages of advanced formulations against conventional ones. The significance of plant metabolites stimulation and their importance in functional food production is also pointed out. This review offers guidelines in developing biopolymeric microparticles loaded with chemical and biological agents and guidelines for the application in plant production, underlining its effect on the plant metabolites synthesis.
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13
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Kaale L, Kimanya M, Macha I, Mlalila N. Aflatoxin contamination and recommendations to improve its control: a review. WORLD MYCOTOXIN J 2021. [DOI: 10.3920/wmj2020.2599] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Aflatoxin producing fungi cause contamination of food and feed resulting in health hazards and economic loss. It is imperative to develop workable control measures throughout the food chain to prevent and reduce aflatoxin contamination. This is a critical review of contemporary published papers in the field. It is a review of reports from the original aflatoxin researches conducted on foods, from 2015-2020. Most of the reports show high aflatoxin contaminations in food at levels that exceed a regulatory limit of 20 μg/kg and 4 μg/kg set for foods for human consumption in the USA and European Union, respectively. The highest aflatoxin concentration (3,760 μg/kg) was observed in maize. Some of the strategies being deployed in aflatoxin control include application of biocontrol agents, specifically of Aflasafe™, development of resistant crop varieties, and application of other good agricultural practices. We recommend the adoption of emerging technologies such as combined methods technology (CMT) or hurdle technology, one health concept (OHC), improved regulations, on-line monitoring of aflatoxins, and creative art intervention (CAI) to prevent or restrict the growth of target aflatoxin causative fungi.
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Affiliation(s)
- L.D. Kaale
- University of Dar es Salaam (UDSM), Department of Food Science and Technology, P.O. Box 35134, Dar es Salaam, Tanzania
| | - M.E. Kimanya
- School of Life Sciences and Bioengineering, Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, Tanzania
| | - I.J. Macha
- University of Dar es Salaam (UDSM), Department of Mechanical and Industrial Engineering, P.O. Box 35131, Dar es Salaam, Tanzania
| | - N. Mlalila
- University of Dar es Salaam (UDSM), Department of Food Science and Technology, P.O. Box 35134, Dar es Salaam, Tanzania
- Ministry of Livestock and Fisheries, P.O. Box 2847, Dodoma, Tanzania
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