1
|
Shanmuganathan R, Nguyen ND, Fathima H A, Devanesan S, Farhat K, Liu X. In vitro analysis of iron oxide (Fe 3O 4) nanoparticle mediated degradation of polycyclic aromatic hydrocarbons (PAHs) and their antimicrobial activity. Chemosphere 2023; 345:140513. [PMID: 37890794 DOI: 10.1016/j.chemosphere.2023.140513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 10/15/2023] [Accepted: 10/20/2023] [Indexed: 10/29/2023]
Abstract
To degrade anthracene, magnetite nanoparticles were produced using a simple co-precipitation process. The fabricated nanoparticles have been analyzed for structural and optical properties. XRD examination revealed that the produced Fe3O4 nanoparticles were cubic phase, having a mean crystallite dimension of 18.84 nm. DLS determined the hydrodynamic diameter of Fe3O4 nanoparticles to be 182 nm. UV-Vis research revealed that Fe3O4 nanoparticles absorb at 390 nm. A peak at 895 cm-1 in the FT-IR study indicated the metal-oxygen connection. The synthesized Fe3O4 nanoparticles demonstrated an effective photocatalytic performance towards anthracene degradation and was found to be 86.55%. Furthermore, Fe3O4 nanoparticles showed the highest antimicrobial activity against Bacillus subtilis was 19.43 mm. The present study is the first and foremost study determining the dual role of Fe3O4 nanoparticles towards bioremediation and biomedical applications.
Collapse
Affiliation(s)
- Rajasree Shanmuganathan
- Institute for Research and Training in Medicine, Biology and Pharmacy, Duy Tan University, Da Nang, Viet Nam; School of Medicine & Pharmacy, Duy Tan University, Da Nang, Viet Nam.
| | - N D Nguyen
- Institute for Research and Training in Medicine, Biology and Pharmacy, Duy Tan University, Da Nang, Viet Nam; School of Medicine & Pharmacy, Duy Tan University, Da Nang, Viet Nam
| | - Aafreen Fathima H
- Center for Global Health Research, Saveetha Medical College, Saveetha Institute of Medical and Technical Sciences, India
| | - Sandhanasamy Devanesan
- Department of Physics and Astronomy, College of Science, King Saud University, P. O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Karim Farhat
- Department of Urology, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Xinghui Liu
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, 999077, Hong Kong, China
| |
Collapse
|
2
|
Strachan JB, Dyett B, Chan S, McDonald B, Vlahos R, Valery C, Conn CE. A promising new oral delivery mode for insulin using lipid-filled enteric-coated capsules. Biomater Adv 2023; 148:213368. [PMID: 36931081 DOI: 10.1016/j.bioadv.2023.213368] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 02/28/2023] [Accepted: 03/01/2023] [Indexed: 03/08/2023]
Abstract
The treatment of diabetes requires daily administration of the peptide insulin via subcutaneous (SC) injection due to poor stability following oral administration. Enteric capsules, designed to protect against low pH conditions in the stomach by providing a polymeric coating which only breaks down in the small intestine, have failed to significantly increase oral bioavailability for insulin. In parallel, amphiphilic lipid mesophases are versatile carrier materials which can protect encapsulated proteins and peptides from undesirable enzymatic degradation. Here we show the combined delivery capacity of a hydrated bicontinuous cubic lipid mesophase embedded within an enteric capsule. Animal studies demonstrated that the lipid filled enteric capsules could deliver insulin with bioavailabilities (relative to SC injection) as high as 99 % and 150 % for fast and slow acting insulin, respectively. These results provide a promising starting point towards further trials to develop an alternative, non-invasive mode for the delivery of insulin.
Collapse
Affiliation(s)
- Jamie B Strachan
- School of Science, STEM College, RMIT University, VIC, 3001 Melbourne, Australia.
| | - Brendan Dyett
- School of Science, STEM College, RMIT University, VIC, 3001 Melbourne, Australia
| | - Stanley Chan
- School of Health and Biomedical Sciences, STEM College, RMIT University, VIC, 3083 Bundoora, Australia
| | - Brody McDonald
- School of Health and Biomedical Sciences, STEM College, RMIT University, VIC, 3083 Bundoora, Australia
| | - Ross Vlahos
- School of Health and Biomedical Sciences, STEM College, RMIT University, VIC, 3083 Bundoora, Australia
| | - Celine Valery
- School of Health and Biomedical Sciences, STEM College, RMIT University, VIC, 3083 Bundoora, Australia
| | - Charlotte E Conn
- School of Science, STEM College, RMIT University, VIC, 3001 Melbourne, Australia.
| |
Collapse
|
3
|
Elraggal A, Aboushelib M, Abdel Raheem IM, Afifi RR. Effect of surface treatments on biaxial flexural strength, fatigue resistance, and fracture toughness of high versus low translucency zirconia. BMC Oral Health 2022; 22:412. [PMID: 36123676 PMCID: PMC9487058 DOI: 10.1186/s12903-022-02431-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 09/05/2022] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Mechanical surface treatments can deteriorate the mechanical properties of zirconia. This study evaluated and compared the biaxial flexural strength, fracture toughness, and fatigue resistance of high translucency (HT) to low translucency (LT) zirconia after various mechanical surface treatments. METHODS Four hundred eighty zirconia discs were prepared by milling and sintering two HT (Katana and BruxZir) and LT (Cercon and Lava) zirconia blocks at targeted dimensions of 12 mm diameter × 1.2 mm thickness. Sintered zirconia discs received one of the following surface treatments: low-pressure airborne particle abrasion (APA) using 50 µm alumina particles, grinding using 400 grit silicon carbide paper, while as-sintered specimens served as control. Internal structure and surface roughness were evaluated by scanning electron microscope (SEM) and a non-contact laser profilometer, respectively. Half of the discs were tested for initial biaxial flexural strength, while the rest was subjected to 106 cyclic fatigue loadings, followed by measuring the residual biaxial flexural strength. Fractured surfaces were examined for critical size defects (c) using SEM to calculate the fracture toughness (KIC). The effect of surface treatments, zirconia type, and cyclic fatigue on the biaxial flexural strength was statistically analyzed using three-way analysis of variance (ANOVA) and Tukey HSD post hoc tests (α = 0.05). Weibull analysis was done to evaluate the reliability of the flexural strength for different materials. RESULTS The initial biaxial flexural strength of LT zirconia was significantly higher (p < 0.001) than that of HT zirconia in all groups. While low APA significantly increased the biaxial flexural strength of LT zirconia, no significant change was observed for HT zirconia except for Katana. Surface grinding and cyclic fatigue significantly reduced the flexural strength of all groups. High translucency zirconia reported higher fracture toughness, yet with lower Weibull moduli, compared to LT zirconia. CONCLUSION LT zirconia has higher biaxial flexural strength, yet with lower fracture toughness and fatigue resistance, compared to HT zirconia. Low-pressure APA has significantly increased the biaxial flexural strength in all zirconia groups except BruxZir. Grinding was deteriorating to biaxial flexural strength and fracture toughness in all zirconia types. Cyclic fatigue has significantly decreased the biaxial flexural strength and reliability of HT and LT zirconia.
Collapse
Affiliation(s)
- Alaaeldin Elraggal
- Conservative Dentistry Department, Faculty of Dentistry, Alexandria University, Alexandria, Egypt.
| | - Moustafa Aboushelib
- grid.7155.60000 0001 2260 6941Dental Biomaterials Department, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
| | - Islam M. Abdel Raheem
- grid.7155.60000 0001 2260 6941Conservative Dentistry Department, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
| | - Rania R. Afifi
- grid.7155.60000 0001 2260 6941Conservative Dentistry Department, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
| |
Collapse
|
4
|
Sun J, Zhang S, Ban Y, Li Q, Zhang W, Zhou Q, Yang Y. Solvothermal synthesis and photocatalytic activities of cubic potassium tantalite and cuprum doped potassium tantalite. Spectrochim Acta A Mol Biomol Spectrosc 2021; 246:118995. [PMID: 33032118 DOI: 10.1016/j.saa.2020.118995] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 09/06/2020] [Accepted: 09/20/2020] [Indexed: 06/11/2023]
Abstract
KTaO3 and Cu2+ doped KTaO3 were prepared by a solvothermal process. The measurements of XRD, FTIR, XPS, SEM, BET specific surface area, DRS, photoluminescence, photocurrent and electrochemical impedance spectroscopy measurements were carried out to investigate their physical and chemical properties. Especially, the photocatalytic activities of them were revealed by the photocatalysis of MB with irradiation of light in UV-Vis region. The measurements indicate that the Cu2+ doping does not obviously influence the phase and microstructure of KTaO3, but highly changes the optical and electrochemical properties. Cu2+ doped KTaO3 shows higher photocatalytic activity than KTaO3 in the degradation of methylene blue with irradiation of light in UV-Vis region, which results from the enhanced light absorbance, more efficient transfers and separation of photogenerated charge carriers.
Collapse
Affiliation(s)
- Jianjun Sun
- Shandong Labor Vocational and Technical College, Jinan 250022, China
| | - Shujuan Zhang
- Shandong Labor Vocational and Technical College, Jinan 250022, China
| | - Yan Ban
- Shandong Labor Vocational and Technical College, Jinan 250022, China
| | - Qing Li
- Shandong Labor Vocational and Technical College, Jinan 250022, China
| | - Wenping Zhang
- Shandong Labor Vocational and Technical College, Jinan 250022, China
| | - Qian Zhou
- Shandong Labor Vocational and Technical College, Jinan 250022, China
| | - Yuguo Yang
- Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
| |
Collapse
|
5
|
Pinheiro T, Mayor I, Edwards S, Joven A, Kantzer CG, Kirkham M, Simon A. CUBIC-f: An optimized clearing method for cell tracing and evaluation of neurite density in the salamander brain. J Neurosci Methods 2020; 348:109002. [PMID: 33217411 DOI: 10.1016/j.jneumeth.2020.109002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 10/29/2020] [Accepted: 11/09/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND Although tissue clearing and subsequent whole-brain imaging is now possible, standard protocols need to be adjusted to the innate properties of each specific tissue for optimal results. This work modifies exiting protocols to clear fragile brain samples and documents a downstream pipeline for image processing and data analysis. NEW METHOD We developed a clearing protocol, CUBIC-f, which we optimized for fragile samples, such as the salamander brain. We modified hydrophilic and aqueous' tissue-clearing methods based on Advanced CUBIC by incorporating Omnipaque 350 for refractive index matching. RESULTS By combining CUBIC-f, light sheet microscopy and bioinformatic pipelines, we quantified neuronal cell density, traced genetically marked fluorescent cells over long distance, and performed high resolution characterization of neural progenitor cells in the salamander brain. We also found that CUBIC-f is suitable for conserving tissue integrity in embryonic mouse brains. COMPARISON WITH EXITING METHODS CUBIC-f shortens clearing and staining times, and requires less reagent use than Advanced CUBIC and Advanced CLARITY. CONCLUSION CUBIC-f is suitable for conserving tissue integrity in embryonic mouse brains, larval and adult salamander brains which display considerable deformation using traditional CUBIC and CLARITY protocols.
Collapse
Affiliation(s)
- Tiago Pinheiro
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Ivy Mayor
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Steven Edwards
- Science for Life Laboratory, Department of Applied Physics, Royal Institute of Technology, Solna, Sweden
| | - Alberto Joven
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Christina G Kantzer
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Matthew Kirkham
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden.
| | - András Simon
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| |
Collapse
|