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Abdulaziz F, Issa K, Alyami M, Alotibi S, Alanazi AA, Taha TAM, Saad AME, Hammouda GA, Hamad N, Alshaaer M. Preparation and Characterization of Mono- and Biphasic Ca 1-xAg xHPO 4·nH 2O Compounds for Biomedical Applications. Biomimetics (Basel) 2023; 8:547. [PMID: 37999188 PMCID: PMC10669227 DOI: 10.3390/biomimetics8070547] [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: 10/10/2023] [Revised: 11/09/2023] [Accepted: 11/12/2023] [Indexed: 11/25/2023] Open
Abstract
This study aimed to explore the effects of the full-scale replacement (up to 100%) of Ca2+ ions with Ag1+ ions in the structure of brushite (CaHPO4·2H2O). This substitution has potential benefits for producing monophasic and biphasic Ca1-xAgxHPO4·nH2O compounds. To prepare the starting solutions, (NH4)2HPO4, Ca(NO3)2·4H2O, and AgNO3 at different concentrations were used. The results showed that when the Ag/Ca molar ratio was below 0.25, partial substitution of Ca with Ag reduced the size of the unit cell of brushite. As the Ag/Ca molar ratio increased to 4, a compound with both monoclinic CaHPO4·2H2O and cubic nanostructured Ag3PO4 phases formed. There was a nearly linear relationship between the Ag ion ratio in the starting solutions and the wt% precipitation of the Ag3PO4 phase in the resulting compound. Moreover, when the Ag/Ca molar ratio exceeded 4, a single-phase Ag3PO4 compound formed. Hence, adjusting the Ag/Ca ratio in the starting solution allows the production of biomaterials with customized properties. In summary, this study introduces a novel synthesis method for the mono- and biphasic Ca1-xAgxHPO4·nH2O compounds brushite and silver phosphate. The preparation of these phases in a one-pot synthesis with controlled phase composition resulted in the enhancement of existing bone cement formulations by allowing better mixing of the starting ingredients.
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Affiliation(s)
- Fahad Abdulaziz
- Department of Chemistry, College of Science, University of Ha’il, Ha’il 81451, Saudi Arabia;
| | - Khalil Issa
- Orthopedics Unit, Faculty of Medicine and Health Sciences, An-Najah National University, Nablus 00972, Palestine;
| | - Mohammed Alyami
- Department of Physics, College of Science and Humanities in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (M.A.); (S.A.); (A.M.E.S.); (N.H.)
| | - Satam Alotibi
- Department of Physics, College of Science and Humanities in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (M.A.); (S.A.); (A.M.E.S.); (N.H.)
| | - Abdulaziz A. Alanazi
- Department of Chemistry, College of Science and Humanities in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (A.A.A.); (G.A.H.)
| | - Taha Abdel Mohaymen Taha
- Physics Department, College of Science, Jouf University, P.O. Box 2014, Sakaka 72388, Saudi Arabia;
- Physics and Engineering Mathematics Department, Faculty of Electronic Engineering, Menoufia University, Menouf 32952, Egypt
| | - Asma M. E. Saad
- Department of Physics, College of Science and Humanities in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (M.A.); (S.A.); (A.M.E.S.); (N.H.)
| | - Gehan A. Hammouda
- Department of Chemistry, College of Science and Humanities in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (A.A.A.); (G.A.H.)
| | - Nagat Hamad
- Department of Physics, College of Science and Humanities in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (M.A.); (S.A.); (A.M.E.S.); (N.H.)
| | - Mazen Alshaaer
- Department of Physics, College of Science and Humanities in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (M.A.); (S.A.); (A.M.E.S.); (N.H.)
- Department Mechanics of Materials and Constructions (MEMC), Vrije Universiteit Brussels (VUB), Pleinlaan 2, 1050 Brussels, Belgium
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Rakngam I, Khemthong P, Osakoo N, Rungnim C, Youngjan S, Thongratkaew S, Pengsawang A, Rungtaweevoranit B, Faungnawakij K, Kidkhunthod P, Chanlek N, Khunphonoi R, Loiha S, Prasitnok K, Wittayakun J. Unraveling Structural and Acidic Properties of Al-SBA-15-supported Metal Phosphates: Assessment for Glucose Dehydration. Chempluschem 2023; 88:e202300326. [PMID: 37786294 DOI: 10.1002/cplu.202300326] [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: 06/30/2023] [Revised: 09/11/2023] [Accepted: 10/02/2023] [Indexed: 10/04/2023]
Abstract
5-Hydroxymethylfurfural (5-HMF) synthesized through glucose conversion requires Lewis acid (L) site for isomerization and Brønsted acid (B) site for dehydration. The objective of this work is to investigate the influence of the metal type of Al-SBA-15-supported phosphates of Cr, Zr, Nb, Sr, and Sn on glucose conversion to 5-HMF in a NaCl-H2 O/n-butanol biphasic solvent system. The structural and acid property of all supported metal phosphate samples were fully verified by several spectroscopic methods. Among those catalysts, CrPO/Al-SBA-15 provided the best performance with the highest glucose conversion and 5-HMF yield, corresponding to the highest total acidity of 0.65 mmol/g and optimal L/B ratio of 1.88. For CrPO/Al-SBA-15, another critical parameter is the phosphate-to-chromium ratio. Moreover, DFT simulation of glucose conversion to 5-HMF on the surface of the optimized chromium phosphate structure reveals three steps of fructose dehydration on the Brønsted acid site. Finally, the optimum reaction condition, reusability, and leaching test of the best catalyst were determined. CrPO/Al-SBA-15 is a promising catalyst for glucose conversion to high-value-added chemicals in future biorefinery production.
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Affiliation(s)
- Issaraporn Rakngam
- School of Chemistry, Institute of Science, Suranaree University of Technology (SUT), Nakhon Ratchasima, 30000, Thailand
| | - Pongtanawat Khemthong
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, 12120, Thailand
| | - Nattawut Osakoo
- School of Chemistry, Institute of Science, Suranaree University of Technology (SUT), Nakhon Ratchasima, 30000, Thailand
| | - Chompoonut Rungnim
- National Electronics and Computer Technology Center (NECTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, 12120, Thailand
| | - Saran Youngjan
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, 12120, Thailand
| | - Sutarat Thongratkaew
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, 12120, Thailand
| | - Aniwat Pengsawang
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, 12120, Thailand
| | - Bunyarat Rungtaweevoranit
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, 12120, Thailand
| | - Kajornsak Faungnawakij
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, 12120, Thailand
| | - Pinit Kidkhunthod
- Synchrotron Light Research Institute (SLRI), Nakhon Ratchasima, 30000, Thailand
| | - Narong Chanlek
- Synchrotron Light Research Institute (SLRI), Nakhon Ratchasima, 30000, Thailand
| | - Rattabal Khunphonoi
- Department of Environmental Engineering, Khon Kaen University (KKU), Khon Kaen, 40002, Thailand
| | - Sirinuch Loiha
- Materials Chemistry Research Center, Department of Chemistry, Faculty of Science, Khon Kaen University (KKU), Khon Kaen, 40002, Thailand
| | - Khongvit Prasitnok
- Department of Chemistry, Faculty of Science, Mahasarakam University, Mahasarakam, 44150, Thailand
| | - Jatuporn Wittayakun
- School of Chemistry, Institute of Science, Suranaree University of Technology (SUT), Nakhon Ratchasima, 30000, Thailand
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Pei Y, Li W, Wang L, Cui J, Li L, Ling S, Tang K, Tian H. Mesostructured Fibrils Exfoliated in Deep Eutectic Solvent as Building Blocks of Collagen Membranes. Polymers (Basel) 2023; 15:4008. [PMID: 37836057 PMCID: PMC10574992 DOI: 10.3390/polym15194008] [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: 09/02/2023] [Revised: 09/26/2023] [Accepted: 10/02/2023] [Indexed: 10/15/2023] Open
Abstract
The mesoscale components of collagen (nanofibrils, fibrils, and fiber bundles) are well organized in native tissues, resulting in superior properties and diverse functions. In this paper, we present a simple and controlled liquid exfoliation method to directly extract medium-sized collagen fibers ranging from 102 to 159 nm in diameter from bovine Achilles tendon using urea/hydrochloric acid and a deep eutectic solvent (DES). In situ observations under polarized light microscopy (POM) and molecular dynamics simulations revealed the effects of urea and GuHCl on tendon collagen. FTIR study results confirmed that these fibrils retained the typical structural characteristics of type I collagen. These shed collagen fibrils were then used as building blocks to create independent collagen membranes with good and stable mechanical properties, excellent barrier properties, and cell compatibility. A new method for collagen processing is provided in this work by using DES-assisted liquid exfoliation for constructing robust collagen membranes with mesoscale collagen fibrils as building blocks.
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Affiliation(s)
- Ying Pei
- Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi’an 710021, China;
- Key Laboratory of Processing and Quality Evaluation Technology of Green Plastics of China National Light Industry Council, Beijing Technology and Business University, Beijing 100048, China
- College of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China; (W.L.); (L.W.); (K.T.)
| | - Wei Li
- College of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China; (W.L.); (L.W.); (K.T.)
| | - Lu Wang
- College of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China; (W.L.); (L.W.); (K.T.)
| | - Jing Cui
- School of Physical Science and Technology, Shanghai Tech University, Shanghai 201210, China;
| | - Lu Li
- Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi’an 710021, China;
| | - Shengjie Ling
- School of Physical Science and Technology, Shanghai Tech University, Shanghai 201210, China;
| | - Keyong Tang
- College of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China; (W.L.); (L.W.); (K.T.)
| | - Huafeng Tian
- Key Laboratory of Processing and Quality Evaluation Technology of Green Plastics of China National Light Industry Council, Beijing Technology and Business University, Beijing 100048, China
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Gu G, Li Y, Zuo K, Xiao G. The Influence of pH Value on the Microstructure and Properties of Strontium Phosphate Chemical Conversion Coatings on Titanium. Molecules 2023; 28:6651. [PMID: 37764427 PMCID: PMC10535797 DOI: 10.3390/molecules28186651] [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: 08/06/2023] [Revised: 09/07/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
Strontium (Sr) is a trace element in the human body that can promote bone formation and inhibit bone absorption. A conversion coating of strontium phosphate (Sr-P) on the surface of titanium (Ti) can improve its biological properties and has many potential applications in the fields of dentistry and orthopedics. In the present study, Sr-P coatings with SrHPO4 and Sr3(PO4)2 crystals on Ti are prepared by a phosphate chemical conversion (PCC) treatment and the effect of pH values on the properties of the Sr-P coatings is researched. The results prove that the phase composition, morphology, and corrosion resistance of the coated Ti vary according to the pH values of the PCC solution. The morphology of the conversion deposition on Ti changes from plat-like to cluster-like and then to homogeneous microcrystals as the pH value changes from 2.50 to 3.25. Only discrete SrHPO4 crystals are generated on the substrate at lower pH values, while relatively stable Sr3(PO4)2 and SrHPO4 crystals grow and subsequently form an integrated coating on the Ti as the pH exceeds 2.50. The cross-sectional morphologies and bonding strength of different coatings are also researched. The corrosion resistance of coated Ti improves compared with that of bare Ti because of the Sr-P coatings with a Sr3(PO4)2 phase. In addition, it is indicated that the Sr-P coatings on Ti can improve the adhesion and differentiation of BMSCs.
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Affiliation(s)
- Guochao Gu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China; (G.G.); (Y.L.); (K.Z.)
- School of Materials Science and Engineering, Shandong University, Jinan 250061, China
| | - Yibo Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China; (G.G.); (Y.L.); (K.Z.)
- School of Materials Science and Engineering, Shandong University, Jinan 250061, China
| | - Kangqing Zuo
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China; (G.G.); (Y.L.); (K.Z.)
- School of Materials Science and Engineering, Shandong University, Jinan 250061, China
| | - Guiyong Xiao
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China; (G.G.); (Y.L.); (K.Z.)
- School of Materials Science and Engineering, Shandong University, Jinan 250061, China
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5
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Alanazi AA, Abdulaziz F, Alyami M, Alotibi S, Sakka S, Mallouh SA, Abu-Zurayk R, Alshaaer M. The Effect of Full-Scale Exchange of Ca 2+ with Zn 2+ Ions on the Crystal Structure of Brushite and Its Phase Composition. Biomimetics (Basel) 2023; 8:333. [PMID: 37622938 PMCID: PMC10452532 DOI: 10.3390/biomimetics8040333] [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: 06/18/2023] [Revised: 07/19/2023] [Accepted: 07/24/2023] [Indexed: 08/26/2023] Open
Abstract
This study was carried out to investigate the effect of a complete exchange of Ca2+ with Zn2+ ions on the structure of brushite (CaHPO4·2H2O), which might be advantageous in the production process of CaxZn1-xHPO4·nH2O. To acquire the starting solutions needed for the current study, (NH4)2HPO4, Ca(NO3)2·4H2O, and Zn(NO3)2·6H2O were utilized in several molar concentrations. The findings indicate that Ca is partly substituted by Zn when the Zn/Ca molar ratio is below 0.25 and that Zn doping hinders the crystallization of brushite. A continued increase in the Zn/Ca molar ratio to 1 (at which point the supersaturation of the Zn solution rises) led to a biphasic compound of monoclinic brushite and parascholzite precipitate. Elevating the Zn/Ca molar ratio to 1.5 resulted in a precipitate of a parascholzite-like mineral. Finally, increasing the Zn/Ca molar ratio to 4 and above resulted in the formation of the hopeite mineral. Future biomaterial production with specific and bespoke characteristics can be achieved by adjusting the Zn/Ca ratio in the starting solution. It Rhas been established that the Zn/Ca ratio in the starting solution can be adjusted to obtain minerals with specific compositions. Thus, new synthesis methods for parascholzite and hopeite were introduced for the first time in this manuscript.
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Affiliation(s)
- Abdulaziz A. Alanazi
- Department of Chemistry, College of Science and Humanities in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia;
| | - Fahad Abdulaziz
- Department of Chemistry, College of Science, University of Ha’il, Ha’il 81451, Saudi Arabia;
| | - Mohammed Alyami
- Department of Physics, College of Science and Humanities in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (M.A.); (S.A.)
| | - Satam Alotibi
- Department of Physics, College of Science and Humanities in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (M.A.); (S.A.)
| | - Salah Sakka
- Department of Oral and Maxillofacial Surgery and Diagnostic Sciences, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia;
| | - Saida Abu Mallouh
- Nanotechnology Center-Hamdi Mango Center for Scientific Research, The University of Jordan, Amman 11942, Jordan; (S.A.M.); (R.A.-Z.)
| | - Rund Abu-Zurayk
- Nanotechnology Center-Hamdi Mango Center for Scientific Research, The University of Jordan, Amman 11942, Jordan; (S.A.M.); (R.A.-Z.)
| | - Mazen Alshaaer
- Department of Physics, College of Science and Humanities in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (M.A.); (S.A.)
- Department Mechanics of Materials and Constructions (MEMC), Vrije Universiteit Brussels (VUB), Pleinlaan 2, 1050 Brussels, Belgium
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The Impact of Full-Scale Substitution of Ca2+ with Ni2+ Ions on Brushite’s Crystal Structure and Phase Composition. CRYSTALS 2022. [DOI: 10.3390/cryst12070940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Because the impact of the full-scale substitution of Ca2+ in brushite (CaHPO4·2H2O) with Ni2+ ions has never been systematically explored, it is the focus of this investigation, as it holds potential for use in CaxNi1−xHPO4·nH2O production. These biomaterials have many beneficial characteristics that can be modified to suit diverse applications, including bone tissue regeneration and pharmaceutics. For the present study, NaH2PO4·2H2O, Ca(NO3)2·4H2O, and Ni(NO3)2·6H2O were used in various molar concentrations to obtain the required starting solutions. Previous studies have shown that adding Ni ions in the initial solution below 20% results in the precipitation of monophasic brushite with slight changes in the crystal structure. However, this study confirms that when the Ni ions substitution increases to 20%, a mixture of phases from both brushite and hexaaquanickel(II) hydrogenphosphate monohydrate HNiP (Ni(H2O)6·HPO4·H2O) is formed. The results confirm that the full replacement (100%) of Ca ions by Ni ions results in a monophasic compound solely comprising orthorhombic HNiP nanocrystals. Therefore, a novel technique of HNiP synthesis using the precipitation method is introduced in this research work. These materials are subsequently analyzed utilizing powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). The obtained results confirm that the material microstructure is controlled by the Ni/Ca ratio in the starting solution and can be modified to obtain the desired characteristics of phases and crystals.
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Gashti MP, Stir M, Burgener M, Hulliger J, Choobar BG, Nooralian Z, Moghaddam MR. Hydroxypropyl methylcellulose-controlled in vitro calcium phosphate biomineralization. NEW J CHEM 2022. [DOI: 10.1039/d2nj02365b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Scanning pyroelectric microscopy of DCPD single crystals.
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Affiliation(s)
- Mazeyar Parvinzadeh Gashti
- GTI Chemical Solutions, Inc., 29385, Wellford, South Carolina, USA
- InsectaPel, LLC, 29385, Wellford, South Carolina, USA
| | - Manuela Stir
- Department of Chemistry & Biochemistry, University of Berne, Freiestrasse 3 CH-3012, Berne, Switzerland
| | - Matthias Burgener
- Department of Chemistry & Biochemistry, University of Berne, Freiestrasse 3 CH-3012, Berne, Switzerland
| | - Jürg Hulliger
- Department of Chemistry & Biochemistry, University of Berne, Freiestrasse 3 CH-3012, Berne, Switzerland
| | - Behnam Ghalami Choobar
- Department of chemical engineering, Amirkabir University of technology (Tehran Polytechnic), Tehran, Iran
| | - Zoha Nooralian
- Young Researchers and Elites Club, Yadegar-e-Imam Khomeini (RAH) Branch, Islamic Azad University, Tehran, Iran
| | - Milad Rahimi Moghaddam
- Faculty of Industrial Engineering, Khajeh Nasir Toosi University of Technology, Tehran, Iran
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Cao X, Ge W, Wang Y, Ma M, Wang Y, Zhang B, Wang J, Guo Y. Rapid Fabrication of MgNH 4PO 4·H 2O/SrHPO 4 Porous Composite Scaffolds with Improved Radiopacity via 3D Printing Process. Biomedicines 2021; 9:biomedicines9091138. [PMID: 34572326 PMCID: PMC8468055 DOI: 10.3390/biomedicines9091138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/22/2021] [Accepted: 08/24/2021] [Indexed: 11/25/2022] Open
Abstract
Although bone repair scaffolds are required to possess high radiopacity to be distinguished from natural bone tissues in clinical applications, the intrinsic radiopacity of them is usually insufficient. For improving the radiopacity, combining X-ray contrast agents with bone repair scaffolds is an effective method. In the present research, MgNH4PO4·H2O/SrHPO4 3D porous composite scaffolds with improved radiopacity were fabricated via the 3D printing technique. Here, SrHPO4 was firstly used as a radiopaque agent to improve the radiopacity of magnesium phosphate scaffolds. X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS) were used to characterize the phases, morphologies, and element compositions of the 3D porous composite scaffolds. The radiography image showed that greater SrHPO4 contents corresponded to higher radiopacity. When the SrHPO4 content reached 9.34%, the radiopacity of the composite scaffolds was equal to that of a 6.8 mm Al ladder. The porosity and in vitro degradation of the porous composite scaffolds were studied in detail. The results show that magnesium phosphate scaffolds with various Sr contents could sustainably degrade and release the Mg, Sr, and P elements during the experiment period of 28 days. In addition, the cytotoxicity on MC3T3-E1 osteoblast precursor cells was evaluated, and the results show that the porous composite scaffolds with a SrHPO4 content of 9.34% possessed superior cytocompatibility compared to that of the pure MgNH4PO4·H2O scaffolds when the extract concentration was 0.1 g/mL. Cell adhesion experiments showed that all of the scaffolds could support MC3T3-E1 cellular attachment well. This research indicates that MgNH4PO4·H2O/SrHPO4 porous composite scaffolds have potential applications in the bone repair fields.
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Affiliation(s)
- Xiaofeng Cao
- Key Laboratory of Photochemical Conversion and Optoelectronic Material, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (X.C.); (Y.W.); (M.M.); (Y.W.); (B.Z.); (J.W.)
| | - Wufei Ge
- Department of Orthopedics, The First Affiliated Hospital, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230022, China;
| | - Yihu Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Material, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (X.C.); (Y.W.); (M.M.); (Y.W.); (B.Z.); (J.W.)
| | - Ming Ma
- Key Laboratory of Photochemical Conversion and Optoelectronic Material, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (X.C.); (Y.W.); (M.M.); (Y.W.); (B.Z.); (J.W.)
| | - Ying Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Material, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (X.C.); (Y.W.); (M.M.); (Y.W.); (B.Z.); (J.W.)
| | - Bing Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Material, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (X.C.); (Y.W.); (M.M.); (Y.W.); (B.Z.); (J.W.)
| | - Jianing Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Material, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (X.C.); (Y.W.); (M.M.); (Y.W.); (B.Z.); (J.W.)
| | - Yanchuan Guo
- Key Laboratory of Photochemical Conversion and Optoelectronic Material, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (X.C.); (Y.W.); (M.M.); (Y.W.); (B.Z.); (J.W.)
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Correspondence:
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Tseng TW, Chen TW, Chen SM, Kokulnathan T, Ahmed F, Hasan PMZ, Bilgrami AL, Kumar S. Construction of strontium phosphate/graphitic-carbon nitride: A flexible and disposable strip for acetaminophen detection. JOURNAL OF HAZARDOUS MATERIALS 2021; 410:124542. [PMID: 33257129 DOI: 10.1016/j.jhazmat.2020.124542] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 10/31/2020] [Accepted: 11/06/2020] [Indexed: 06/12/2023]
Abstract
A facile technique has been used to synthesize the strontium phosphate interlinked with graphitic carbon nitride nanosheets (SrP/g-CN NSs) nanocomposite for highly selective detection of acetaminophen (AP). The formation of SrP/g-CN NSs nanocomposite is evidenced by several spectroscopic and analytical methods. It was demonstrated that the SrP/g-CN NSs modified screen-printed carbon electrode (SPCE) exhibits excellent catalytic performance with low peak potential towards AP detection than those of pristine SrP-, g-CN NSs-, and bare- SPCEs. The outstanding electrochemical performance can be attributed to the robust synergistic effect between SrP and g-CN NSs. Likewise, g-CN NSs possess a porous multilayer network, which provides a large surface area, fast charge transferability, electrical conductivity, and numerous active sites. Under the optimal conditions, the fabricated sensor could detect AP with a linear relationship range from 0.01 to 370 µM, and the detection limit is calculated to be as low as 2.0 nM. The proposed sensor is successfully used to determine AP in water samples with satisfactory results.
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Affiliation(s)
- Tien-Wen Tseng
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan, ROC
| | - Tse-Wei Chen
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan, ROC; Research and Development Center for Smart Textile Technology, National Taipei University of Technology, Taipei 106, Taiwan, ROC; Department of Materials, Imperial College London, London SW7 2AZ, United Kingdom
| | - Shen-Ming Chen
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan, ROC.
| | - Thangavelu Kokulnathan
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan, ROC; Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 106, Taiwan, ROC.
| | - Faheem Ahmed
- Department of Physics, College of Science, King Faisal University, P.O. Box 400, Hofuf, Al-Ahsa 31982, Saudi Arabia
| | - P M Z Hasan
- Center of Nanotechnology, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia
| | - Anwar L Bilgrami
- Deanship of Scientific Research, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia
| | - Shalendra Kumar
- Department of Physics, College of Science, King Faisal University, P.O. Box 400, Hofuf, Al-Ahsa 31982, Saudi Arabia; Department of Physics, School of Engineering, University of Petroleum & Energy Studies, Dehradun 248007, India
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10
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Gradual Replacement of Ca2+ with Mg2+ Ions in Brushite for the Production of Ca1−xMgxHPO4·nH2O Materials. MINERALS 2021. [DOI: 10.3390/min11030284] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The present study investigates the gradual replacement of Ca2+ with Mg2+ ions in brushite (CaHPO4·2H2O). To date, this approach has not been systematically explored and may prove beneficial for the production of Ca1−xMgxHPO4·nH2O materials with tailored properties which are suitable for environmental and medical applications. For their production, solutions of sodium dihydrogen orthophosphate dehydrate, NaH2PO4·2H2O, calcium nitrate tetrahydrate, Ca(NO3)2·4H2O, magnesium nitrate hexahydrate, Mg(NO3)2·6H2O and ammonium hydroxide solution, NH4OH, were used. At low Mg/Ca molar ratios (up to 0.25) in the starting solution, partial replacement of Ca with Mg takes place (Mg doping) but no struvite is produced as discrete phase. When the Mg/Ca molar ratio increases gradually to 1.5, in addition to Mg-doped brushite, struvite, NH4MgPO4·6H2O, precipitates. The microstructure of the materials produced for different degrees of Ca replacement with Mg has been analyzed in depth with the use of powdered XRD (X-ray diffraction), XPS (X-ray photoelectron spectroscopy), thermogravimetric (TG) analysis and SEM (scanning electron microscopy). The results of this study prove that the Mg/Ca ratio in the starting solution can be monitored in such a way that materials with tailored composition are obtained.
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11
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Argon and Argon-Oxygen Plasma Surface Modification of Gelatin Nanofibers for Tissue Engineering Applications. MEMBRANES 2021; 11:membranes11010031. [PMID: 33401681 PMCID: PMC7823286 DOI: 10.3390/membranes11010031] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/21/2020] [Accepted: 12/29/2020] [Indexed: 01/16/2023]
Abstract
In the present study, we developed a novel approach for functionalization of gelatin nanofibers using the plasma method for tissue engineering applications. For this purpose, tannic acid-crosslinked gelatin nanofibers were fabricated with electrospinning, followed by treatment with argon and argon–oxygen plasmas in a vacuum chamber. Samples were evaluated by using scanning electron microscopy (SEM), atomic force microscopy (AFM), attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, contact angle (CA) and X-ray diffraction (XRD). The biological activity of plasma treated gelatin nanofibers were further investigated by using fibroblasts as cell models. SEM studies showed that the average diameter and the surface morphology of nanofibers did not change after plasma treatment. However, the mean surface roughness (RMS) of samples were increased due to plasma activation. ATR-FTIR spectroscopy demonstrated several new bands on plasma treated fibers related to the plasma ionization of nanofibers. The CA test results stated that the surface of nanofibers became completely hydrophilic after argon–oxygen plasma treatment. Finally, increasing the polarity of crosslinked gelatin after plasma treatment resulted in an increase of the number of fibroblast cells. Overall, results expressed that our developed method could open new insights into the application of the plasma process for functionalization of biomedical scaffolds. Moreover, the cooperative interplay between gelatin biomaterials and argon/argon–oxygen plasmas discovered a key composition showing promising biocompatibility towards biological cells. Therefore, we strongly recommend plasma surface modification of nanofiber scaffolds as a pretreatment process for tissue engineering applications.
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12
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Parvinzadeh Gashti M, Dehghan N. Gel diffusion-inspired biomimetic calcium iodate/gelatin composite particles: Structural characterization and antibacterial activity. J SOLID STATE CHEM 2020. [DOI: 10.1016/j.jssc.2020.121262] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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13
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Chen X, Jiang R, Zhou Z, Wang X. Synthesis and catalytic properties of ZSM-5 crystals with different morphologies in gelatin hydrogels. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1703735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Xueshuai Chen
- School of Chemical Engineering and Technology, China University of Mining and Technology Xuzhou, Jiangsu, P.R. China
| | - Rongli Jiang
- School of Chemical Engineering and Technology, China University of Mining and Technology Xuzhou, Jiangsu, P.R. China
| | - Zihan Zhou
- School of Chemical Engineering and Technology, China University of Mining and Technology Xuzhou, Jiangsu, P.R. China
| | - Xingwen Wang
- School of Chemical Engineering and Technology, China University of Mining and Technology Xuzhou, Jiangsu, P.R. China
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14
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Jeong S, Kim B, Lau HC, Kim A. Gelatin-Alginate Complexes for EGF Encapsulation: Effects of H-Bonding and Electrostatic Interactions. Pharmaceutics 2019; 11:pharmaceutics11100530. [PMID: 31614977 PMCID: PMC6835588 DOI: 10.3390/pharmaceutics11100530] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 09/24/2019] [Accepted: 10/11/2019] [Indexed: 01/24/2023] Open
Abstract
Gelatin Type A (GA) and sodium alginate (SA) complexes were explored to encapsulate epidermal growth factor (EGF), and thereby to circumvent its proteolytic degradation upon topical application to chronic wounds. Phase diagrams were constructed based on turbidity as a function of GA to SA ratio and pH. Various GA-SA mixtures were compared for polydispersity index, zeta potential, Z-average, and ATR-FTIR spectra. Trypsin digestion and human dermal fibroblast scratch wound assay were done to evaluate the effects of EGF encapsulation. The onset pH values for coacervation and precipitation were closer together in high molecular weight GA (HWGA)-SA reaction mixtures than in low molecular weight GA (LWGA)-SA, which was attributed to strong H-bonding interactions between HWGA and SA probed by ATR-FTIR. EGF incorporation in both HWGA-SA precipitates and LWGA-SA coacervates below the isoelectric point of EGF, but not above it, suggests the contribution of electrostatic interactions between EGF and SA. EGF encapsulated in LWGA-SA coacervates was effectively protected from trypsin digestion and showed better in vitro scratch wound activity compared to free EGF. LWGA-SA coacervates are suggested as a novel delivery system for topical application of EGF to chronic wounds.
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Affiliation(s)
- Seonghee Jeong
- College of Pharmacy, CHA University, Seongnam-si, Gyeonggi-do 463-400, Korea.
| | - ByungWook Kim
- College of Pharmacy, CHA University, Seongnam-si, Gyeonggi-do 463-400, Korea
| | - Hui-Chong Lau
- College of Pharmacy, CHA University, Seongnam-si, Gyeonggi-do 463-400, Korea.
| | - Aeri Kim
- College of Pharmacy, CHA University, Seongnam-si, Gyeonggi-do 463-400, Korea.
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15
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Chen IH, Chen YF, Liou JH, Lai JT, Hsu CC, Wang NY, Jan JS. Green synthesis of gold nanoparticle/gelatin/protein nanogels with enhanced bioluminescence/biofluorescence. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 105:110101. [PMID: 31546461 DOI: 10.1016/j.msec.2019.110101] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 07/24/2019] [Accepted: 08/19/2019] [Indexed: 12/15/2022]
Abstract
Here we report the green synthesis of gelatin/protein hybrid nanogels containing gold nanoparticles (AuNPs) that collectively exhibit metal-enhanced luminescence/fluorescence (MEL/MEF). The gelatin/protein nanogels, prepared by genipin cross-linking of preformed gelatin/protein polyion complexes (PICs), exhibited sizes ranging between 50 and 200 nm, depending on the weight ratio of gelatin and protein. These nanogels serve as reducing and stabilizing agents for the AuNPs, allowing for nucleation in a gel network that exhibits colloidal stability and MEL/MEF. AuNP/gelatin/HRP and AuNP/gelatin/LTF nanogels presented an ~11-fold enhancement of bioluminescence in an HRP-luminol system and a ~50-fold fluorescence enhancement when compared to free LTF in cell uptake experiments. These hybrid nanogels show promise for optically enhanced diagnosis and other therapeutic applications.
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Affiliation(s)
- I-Hsiu Chen
- Department of Chemical Engineering, National Cheng Kung University, No 1, University Rd., Tainan 70101, Taiwan
| | - Yu-Fon Chen
- Department of Chemical Engineering, National Cheng Kung University, No 1, University Rd., Tainan 70101, Taiwan
| | - Jhih-Han Liou
- Department of Chemical Engineering, National Cheng Kung University, No 1, University Rd., Tainan 70101, Taiwan
| | - Jinn-Tsyy Lai
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, Hsinchu 30052, Taiwan
| | - Chia-Chen Hsu
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, Hsinchu 30052, Taiwan
| | - Nai-Yi Wang
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, Hsinchu 30052, Taiwan
| | - Jeng-Shiung Jan
- Department of Chemical Engineering, National Cheng Kung University, No 1, University Rd., Tainan 70101, Taiwan; Hierarchical Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University, Tainan 70101, Taiwan.
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16
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Vaseghi Z, Tavakoli O, Nematollahzadeh A. New insights into mechanistic aspects and structure of polycrystalline Cu/Cr/Ni metal oxide nanoclusters synthesized using Eryngium campestre and Froriepia subpinnata. KOREAN J CHEM ENG 2019. [DOI: 10.1007/s11814-018-0216-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Lu Z, Tan R, Chu W, Tang S, Xu W, Song W. Synthesis of SrHPO 4 /Fe 3 O 4 magnetic nanocomposite and its application on Pb 2+ removal from aqueous solutions. Microchem J 2018. [DOI: 10.1016/j.microc.2018.06.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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18
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Shahlori R, McDougall DR, Waterhouse GIN, Yao F, Mata JP, Nelson ARJ, McGillivray DJ. Biomineralization of Calcium Phosphate and Calcium Carbonate within Iridescent Chitosan/Iota-Carrageenan Multilayered Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:8994-9003. [PMID: 29961323 DOI: 10.1021/acs.langmuir.8b00434] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This work systematically explores the biomineralization of calcium phosphate (CaP) and carbonate (CaCO3) within chitosan/iota-carrageenan multilayer films. Multilayer films of chitosan and iota-carrageenan (up to 128-coupled layers) were prepared on glass substrates by a layer-by-layer dip-coating technique. Cryo-scanning electron microscopy revealed dense interfaces between the chitosan and iota-carrageenan layers with thicknesses in the range 250 and 350 nm in the hydrated state, accounting for the iridescent nature of multilayer films when wet. Immersion of the multilayered films in simulated body fluid or simulated seawater at 25 °C resulted in the mineralization of CaP and CaCO3, respectively, at the interfaces between the biopolymer layers and modified the iridescence of the films. Lamellar scattering features in small-angle neutron scattering measurements of the mineralized films provided evidence of the localized mineralization. Further evidence of this was found through the lack of change in the dynamic and static correlation lengths of the polymer networks within the bulk phase of the chitosan and iota-carrageenan layers. CaP mineralization occurred to a greater extent than CaCO3 mineralization within the films, evidenced by the higher lamellar density and greater rigidity of the CaP-mineralized films. Results provide valuable new insights into CaP and CaCO3 biomineralization in biopolymer networks.
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Affiliation(s)
- Rayomand Shahlori
- School of Chemical Sciences , University of Auckland , Private Bag, 90219 Auckland , New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology , Wellington 6140 , New Zealand
| | - Daniel R McDougall
- School of Chemical Sciences , University of Auckland , Private Bag, 90219 Auckland , New Zealand
| | - Geoffrey I N Waterhouse
- School of Chemical Sciences , University of Auckland , Private Bag, 90219 Auckland , New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology , Wellington 6140 , New Zealand
| | - Feihong Yao
- School of Chemical Sciences , University of Auckland , Private Bag, 90219 Auckland , New Zealand
| | - Jitendra P Mata
- Australian Nuclear Science and Technology Organization , Locked Bag 2001, Kirrawee DC , New South Wales 2232 , Australia
| | - Andrew R J Nelson
- Australian Nuclear Science and Technology Organization , Locked Bag 2001, Kirrawee DC , New South Wales 2232 , Australia
| | - Duncan J McGillivray
- School of Chemical Sciences , University of Auckland , Private Bag, 90219 Auckland , New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology , Wellington 6140 , New Zealand
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19
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Chu W, Lu Z, Tan R, Tang S, Xu W, Song W, Zhao J. Comparative study on Pb 2+ removal using hydrothermal synthesized β-SrHPO 4 , Sr 3 (PO 4 ) 2 , and Sr 5 (PO 4 ) 3 (OH) powders. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2018.01.073] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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20
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Moré R, Olah M, Balaghi SE, Jäker P, Siol S, Zhou Y, Patzke GR. Bi 2O 2CO 3 Growth at Room Temperature: In Situ X-ray Diffraction Monitoring and Thermal Behavior. ACS OMEGA 2017; 2:8213-8221. [PMID: 31457364 PMCID: PMC6644937 DOI: 10.1021/acsomega.7b01359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 11/07/2017] [Indexed: 06/10/2023]
Abstract
The room-temperature formation of bismuth oxycarbonate (Bi2O2CO3) from Bi2O3 in sodium carbonate buffer was investigated with in situ powder X-ray diffraction (PXRD) in combination with electron microscopy and vibrational spectroscopy. Time-resolved PXRD measurements indicate a pronounced and rather complex pH dependence of the reaction mechanism. Bi2O2CO3 formation proceeds within a narrow window between pH 8 and 10 via different mechanisms. Although a zero-dimensional nucleation model prevails around pH 8, higher pH values induce a change toward a diffusion-controlled model, followed by a transition to regular nucleation kinetics. Ex situ synthetic and spectroscopic studies confirm these trends and demonstrate that in situ monitoring affords vital parameter information for the controlled fabrication of Bi2O2CO3 materials. Furthermore, the β → α bismuth oxide transformation temperatures of Bi2O2CO3 precursors obtained from different synthetic routes differ notably (by min 50 °C) from commercially available bismuth oxide. Parameter studies suggest a stabilizing role of surface carbonate ions in the as-synthesized bismuth oxide sources. Our results reveal the crucial role of multiple preparative history parameters, especially of pH value and source materials, for the controlled access to bismuth oxide-based catalysts and related functional compounds.
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Affiliation(s)
- René Moré
- Department
of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Michael Olah
- Department
of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - S. Esmael Balaghi
- Department
of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Philipp Jäker
- Laboratory
for Multifunctional Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland
| | - Sebastian Siol
- Laboratory
for Joining Technologies and Corrosion, Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Ying Zhou
- The
Center of New Energy Materials and Technology, School of Materials
Science and Engineering, Southwest Petroleum
University, 610500 Chengdu, China
| | - Greta R. Patzke
- Department
of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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21
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Sen S, Tyagi M, Sharma K, Sarkar PS, Sarkar S, Basak CB, Pitale S, Ghosh M, Gadkari SC. Organic-Inorganic Composite Films Based on Gd 3Ga 3Al 2O 12:Ce Scintillator Nanoparticles for X-ray Imaging Applications. ACS APPLIED MATERIALS & INTERFACES 2017; 9:37310-37320. [PMID: 28990750 DOI: 10.1021/acsami.7b11289] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Organic-inorganic nanocomposite self-standing films of Gd3Ga3Al2O12 (GGAG) uniformly dispersed in poly(methyl methacrylate) (PMMA) and polystyrene polymer are prepared for radiography application. GGAG:Ce nanoscintillator has been chosen because of its high light output and fast decay time. The nanopowder of GGAG is synthesized by coprecipitation method and dispersed in the polymer matrix by a simple blending technique. The nanocomposite films of thickness in the range of 150-450 μm with a very high inorganic content is achieved by this technique. These films are characterized by their uniformity, optical absorption, photoluminescence, and radioluminescence. These films are further tested for their application in radiography by recording X-ray images using a commercially available charge-coupled device camera. A resolution of 10 lp/mm is obtained using GGAG:PMMA composite film with 50% loading, confirming their application in imaging devices.
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Affiliation(s)
| | | | - Kusha Sharma
- Department of Converging Technology, University of Rajasthan , Jaipur 302 004, India
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22
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Bio-functionalizing heterogeneous phase activated titanium by multiphoton ionization energy mechanism to harmonize cell proliferative behavior. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:448-456. [PMID: 28482549 DOI: 10.1016/j.msec.2017.03.111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 01/22/2017] [Accepted: 03/13/2017] [Indexed: 11/23/2022]
Abstract
Cellular interactions are regulated by various mechanical, physical and chemical factors that are either introduced to or are pre-existing in their local microenvironments. These factors include geometric confinement, cell-substrate interactions and cell-cell contacts. The systematic elucidation of these dictating mechanisms is crucial for fundamental understanding of regenerative medicine and for designing biomedical devices. Here, we have developed an elegant multi-photon ionization based mechanism, which accomplishes selective surface bio-functionalization of native titanium substrates, to achieve stable cellular confinements. In particular, we applied selective titanium phase activation for cellular confinement of mouse fibroblasts and osteoblast cells in an effort to examine their directionality and proliferative behavior under confinement. The experimental results suggest, both mouse fibroblasts and osteoblasts can be manipulated, guided and aligned along an induced orientation by selective hongquiite phase activation. The cell viability of both fibroblast and osteoblast cells were observed through fluorescent assays and SEM techniques. The phase activated surface fabricated influenced both nuclei and actin cytoskeletal re-arrangement of cell structures.
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23
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Fayyazbakhsh F, Solati-Hashjin M, Keshtkar A, Shokrgozar MA, Dehghan MM, Larijani B. Novel layered double hydroxides-hydroxyapatite/gelatin bone tissue engineering scaffolds: Fabrication, characterization, and in vivo study. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:701-714. [PMID: 28482581 DOI: 10.1016/j.msec.2017.02.172] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/21/2016] [Accepted: 02/28/2017] [Indexed: 10/19/2022]
Abstract
Developing porous biodegradable scaffolds through simple methods is one of the main approaches of bone tissue engineering (BTE). In this work, a novel BTE composite containing layered double hydroxides (LDH), hydroxyapatite (HA) and gelatin (GEL) was fabricated using co-precipitation and solvent-casting methods. Physiochemical characterizations showed that the chemical composition and microstructure of the scaffolds were similar to the natural spongy bone. Interconnected macropores ranging over 100 to 600μm were observed for both scaffolds while the porosity of 90±0.12% and 92.11±0.15%, as well as, Young's modulus of 19.8±0.41 and 12.5±0.35GPa were reported for LDH/GEL and LDH-HA/GEL scaffolds, respectively. The scaffolds were degraded in deionized water after a month. The SEM images revealed that between two scaffolds, the LDH-HA/GEL with needle-like secondary HA crystals showed better bioactivity. According to the alkaline phosphatase activity and Alizarin red staining results, LDH-HA/GEL scaffolds demonstrated better bone-specific activities comparing to LDH/Gel scaffold as well as control sample (P<0.05). The rabbit adipose stem cells (ASCs) were extracted and cultured, then seeded on the LDH-HA/GEL scaffolds after confluence. Three groups of six adult rabbits were prepared: the scaffold+ASCs group, the empty scaffold group and the control group. The critical defects were made on the left radius and the scaffolds with or without ASCs were implanted there while the control group was left without any treatment. All animals were sacrificed after 12weeks. Histomorphometric results showed that the regeneration of defects was accelerated by scaffold implantation but ASC-seeding significantly improved the quality of new bone formation (P<0.05). The results confirmed the good performance of LDH-HA/GEL scaffold to induce bone regeneration.
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Affiliation(s)
- Fateme Fayyazbakhsh
- Biomedical Engineering Faculty, Amirkabir University of Technology, Tehran, Iran
| | - Mehran Solati-Hashjin
- Biomedical Engineering Faculty, Amirkabir University of Technology, Tehran, Iran; Biomaterials Center of Excellence, Amirkabir University of Technology, Tehran, Iran.
| | - Abbas Keshtkar
- Department of Health Sciences Education Development, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Mohammad Mehdi Dehghan
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran; Institute of Biomedical Research, University of Tehran, Tehran, Iran
| | - Bagher Larijani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
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24
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Chou SF, Luo LJ, Lai JY, Ma DHK. Role of solvent-mediated carbodiimide cross-linking in fabrication of electrospun gelatin nanofibrous membranes as ophthalmic biomaterials. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 71:1145-1155. [PMID: 27987671 DOI: 10.1016/j.msec.2016.11.105] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Revised: 11/18/2016] [Accepted: 11/24/2016] [Indexed: 02/04/2023]
Abstract
Due to their ability to mimic the structure of extracellular matrix, electrospun gelatin nanofibers are promising cell scaffolding materials for tissue engineering applications. However, the hydrophilic gelatin molecules usually need stabilization before use in aqueous physiological environment. Considering that biomaterials cross-linked via film immersion technique may have a more homogeneous cross-linked structure than vapor phase cross-linking, this work aims to investigate the chemical modification of electrospun gelatin nanofibrous membranes by liquid phase carbodiimide in the presence of ethanol/water co-solvents with varying ethanol concentrations ranging from 80 to 99.5vol%. The results of characterization showed that increasing water content in the binary reaction solvent system increases the extent of cross-linking of gelatin nanofibers, but simultaneously promotes the effect of biopolymer swelling and distortion in fiber mat structure. As compared to non-cross-linked counterparts, carbodiimide treated gelatin nanofibrous mats exhibited better thermal and biological stability where the shrinkage temperature and resistance to enzymatic degradation varied in response to ethanol/water solvent composition-mediated generation of cross-links. Irrespective of their cross-linking density, all studied membrane samples did not induce any responses in ocular epithelial cell cultures derived from cornea, lens, and retina. Unlike many other cross-linking agents and/or methods (e.g., excessive vapor phase cross-linking) that may pose a risk of toxicity, our study demonstrated that these nanofibrous materials are well tolerated by anterior segment tissues. These findings also indicate the safety of using ethanol/water co-solvents for chemical cross-linking of gelatin to engineer nanofibrous materials with negligible biological effects. In summary, the present results suggest the importance of solvent-mediated carbodiimide cross-linking in modulating structure-property relationship without compromising in vitro and in vivo biocompatibility of electrospun gelatin nanofibers for future ophthalmic applications.
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Affiliation(s)
- Shih-Feng Chou
- Department of Mechanical Engineering, University of Texas at Tyler, Tyler, TX 75799, USA
| | - Li-Jyuan Luo
- Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan, ROC
| | - Jui-Yang Lai
- Institute of Biochemical and Biomedical Engineering, Chang Gung University, Taoyuan 33302, Taiwan, ROC; Biomedical Engineering Research Center, Chang Gung University, Taoyuan 33302, Taiwan, ROC; Center for Tissue Engineering, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan, ROC; Department of Ophthalmology, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan, ROC; Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan, ROC.
| | - David Hui-Kang Ma
- Center for Tissue Engineering, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan, ROC; Department of Ophthalmology, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan, ROC; Department of Chinese Medicine, Chang Gung University, Taoyuan 33302, Taiwan, ROC
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25
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Dong Y, Liu W, Lei Y, Wu T, Zhang S, Guo Y, Liu Y, Chen D, Yuan Q, Wang Y. Effect of gelatin sponge with colloid silver on bone healing in infected cranial defects. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 70:371-377. [PMID: 27770905 DOI: 10.1016/j.msec.2016.09.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 08/17/2016] [Accepted: 09/06/2016] [Indexed: 02/05/2023]
Abstract
Oral infectious diseases may lead to bone loss, which makes it difficult to achieve satisfactory restoration. The rise of multidrug resistant bacteria has put forward severe challenges to the use of antibiotics. Silver (Ag) has long been known as a strong antibacterial agent. In clinic, gelatin sponge with colloid silver is used to reduce tooth extraction complication. To investigate how this material affect infected bone defects, methicillin-resistant Staphylococcus aureus (MRSA) infected 3-mm-diameter cranial defects were created in adult female Sprague-Dawley rats. One week after infection, the defects were debrided of all nonviable tissue and then implanted with gelatin sponge with colloid silver (gelatin/Ag group) or gelatin alone (gelatin group). At 2 and 3days after debridement, significantly lower mRNA expression levels of IL-6 and TNF-α and lower plate colony count value were detected in gelatin/Ag group than control. Micro-CT analysis showed a significant increase of newly formed bone volume fraction (BV/TV) in gelatin/Ag treated defects. The HE stained cranium sections also showed a faster rate of defect closure in gelatin/Ag group than control. These findings demonstrated that gelatin sponge with colloid silver can effectively reduce the infection caused by MRSA in cranial defects and accelerate bone healing process.
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Affiliation(s)
- Yuliang Dong
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Weiqing Liu
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Yiling Lei
- Dental Implant Center, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Tingxi Wu
- Division of Oral Biology and Medicine, School of Dentistry, University of California Los Angeles (UCLA), Los Angeles, California, USA
| | - Shiwen Zhang
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Yuchen Guo
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Yuan Liu
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Demeng Chen
- Division of Oral Biology and Medicine, School of Dentistry, University of California Los Angeles (UCLA), Los Angeles, California, USA
| | - Quan Yuan
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, China; Dental Implant Center, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yongyue Wang
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, China; Dental Implant Center, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
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