1
|
Mazumder JA, Ahmad A, Ali J, Noori R, Bhuyan T, Sardar M, Sheehan D. Biomimetic green synthesis of ZnO nanoflowers using α-amylase: from antimicrobial to toxicological evaluation. Sci Rep 2024; 14:16566. [PMID: 39019931 PMCID: PMC11254910 DOI: 10.1038/s41598-024-66140-8] [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: 11/06/2023] [Accepted: 06/27/2024] [Indexed: 07/19/2024] Open
Abstract
Biologically mediated synthesis of nanomaterials has emerged as an ecologically benign and biocompatible approach. Our study explores enzymatic synthesis, utilizing α-amylase to synthesize ZnO nanoflowers (ZnO-NFs). X-ray diffraction and energy-dispersive X-ray spectroscopy revealed crystal structure and elemental composition. Dynamic light scattering analysis indicates that ZnO-NFs possess a size of 101 nm. Transmission electron microscopy showed a star-shaped morphology of ZnO-NFs with petal-like structures. ZnO-NFs exhibit potent photocatalytic properties, degrading 90% eosin, 87% methylene blue, and 81% reactive red dyes under UV light, with kinetics fitting the Langmuir-Hinshelwood pseudo-first-order rate law. The impact of pH and interfering substances on dye degradation was explored. ZnO-NFs display efficient bacteriocidal activity against different Gram-positive and negative strains, antibiofilm potential (especially with P. aeruginosa), and hemocompatibility up to 600 ppm, suggesting versatile potential in healthcare and environmental remediation applications.
Collapse
Affiliation(s)
- Jahirul Ahmed Mazumder
- Department of Chemistry, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, United Arab Emirates.
| | - Atika Ahmad
- Department of Chemistry, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, United Arab Emirates
| | - Juned Ali
- Department of Biosciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Rubia Noori
- Department of Biosciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Tamanna Bhuyan
- Department of Applied Biology, School of Biological Sciences, University of Science and Technology Meghalaya, Ri Bhoi, India
| | - Meryam Sardar
- Department of Biosciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - David Sheehan
- Department of Chemistry, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, United Arab Emirates.
| |
Collapse
|
2
|
Wu S, Wang J, Zhang L, Liu S, Li C. Effects of Osmotic Dehydration on Mass Transfer of Tender Coconut Kernel. Foods 2024; 13:2188. [PMID: 39063272 PMCID: PMC11276269 DOI: 10.3390/foods13142188] [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: 06/07/2024] [Revised: 07/05/2024] [Accepted: 07/10/2024] [Indexed: 07/28/2024] Open
Abstract
Tender coconut water has been very popular as a natural beverage rich in various electrolytes, amino acids, and vitamins, and hence a large amount of tender coconut kernel is left without efficient utilization. To explore the possibility of making infused tender coconut kernel, we investigated the effects of two osmosis methods, including solid-state osmotic dehydration and liquid-state osmotic dehydration, as well as two osmosis agents such as sorbitol and sucrose, on the mass transfer of coconut kernel under solid-state osmotic dehydration conditions. The results showed that under the conditions of solid-state osmosis using sucrose and liquid-state osmosis using sucrose solution, the water diffusion coefficients were 9.0396 h-1/2 and 2.9940 h-1/2, respectively, with corresponding water mass transfer coefficients of 0.3373 and 0.2452, and the equilibrium water loss rates of 49.04% and 17.31%, respectively, indicating that the mass transfer efficiency of solid-state osmotic dehydration of tender coconut kernel was significantly higher than that of liquid-state osmotic dehydration. Under solid osmosis conditions, the water loss rates using sucrose and sorbitol were 38.64% and 41.95%, respectively, with dry basis yield increments of 61.38% and 71.09%, respectively, demonstrating superior dehydration efficiency of sorbitol over sucrose under solid-state osmosis. This study can provide a reference for the theoretical study of the mass transfer of tender coconut kernel through osmotic dehydration, and also provide technical support for the development and utilization of tender coconut kernel.
Collapse
Affiliation(s)
- Sihao Wu
- School of Food Science and Engineering, Hainan University, Haikou 570228, China
| | - Juntao Wang
- School of Food Science and Engineering, Hainan University, Haikou 570228, China
| | - Lin Zhang
- School of Food Science and Engineering, Hainan University, Haikou 570228, China
- Key Laboratory of Food Nutrition and Functional Food of Hainan Province, Haikou 570228, China
- Key Laboratory of Tropical Agricultural Products Processing Technology of Haikou, Haikou 570228, China
| | - Sixin Liu
- School of Food Science and Engineering, Hainan University, Haikou 570228, China
- Key Laboratory of Food Nutrition and Functional Food of Hainan Province, Haikou 570228, China
- Key Laboratory of Tropical Agricultural Products Processing Technology of Haikou, Haikou 570228, China
| | - Congfa Li
- School of Food Science and Engineering, Hainan University, Haikou 570228, China
- Key Laboratory of Food Nutrition and Functional Food of Hainan Province, Haikou 570228, China
- Key Laboratory of Tropical Agricultural Products Processing Technology of Haikou, Haikou 570228, China
| |
Collapse
|
3
|
Lima AKO, Souza LMDS, Reis GF, Junior AGT, Araújo VHS, dos Santos LC, da Silva VRP, Chorilli M, Braga HDC, Tada DB, Ribeiro JADA, Rodrigues CM, Nakazato G, Muehlmann LA, Garcia MP. Synthesis of Silver Nanoparticles Using Extracts from Different Parts of the Paullinia cupana Kunth Plant: Characterization and In Vitro Antimicrobial Activity. Pharmaceuticals (Basel) 2024; 17:869. [PMID: 39065720 PMCID: PMC11279972 DOI: 10.3390/ph17070869] [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: 05/28/2024] [Revised: 06/27/2024] [Accepted: 06/30/2024] [Indexed: 07/28/2024] Open
Abstract
The green synthesis of silver nanoparticles (AgNPs) can be developed using safe and environmentally friendly routes, can replace potentially toxic chemical methods, and can increase the scale of production. This study aimed to synthesize AgNPs from aqueous extracts of guarana (Paullinia cupana) leaves and flowers, collected in different seasons of the year, as a source of active biomolecules capable of reducing silver ions (Ag+) and promoting the stabilization of colloidal silver (Ag0). The plant aqueous extracts were characterized regarding their metabolic composition by liquid chromatography coupled to high-resolution mass spectrometry (UHPLC-HRMS/MS), phenolic compound content, and antioxidant potential against free radicals. The synthesized AgNPs were characterized by UV/Vis spectrophotometry, dynamic light scattering (DLS), nanoparticle tracking analysis (NTA), transmission electron microscopy (TEM), and scanning electron microscopy coupled to energy-dispersive X-ray spectrometry (EDX). The results demonstrated that the chemical characterization indicated the presence of secondary metabolites of many classes of compounds in the studied aqueous extracts studied, but alkaloids and flavonoids were predominant, which are widely recognized for their antioxidant capabilities. It was possible to notice subtle changes in the properties of the nanostructures depending on parameters such as seasonality and the part of the plant used, with the AgNPs showing surface plasmon resonance bands between 410 and 420 nm using the leaf extract and between 440 and 460 nm when prepared using the flower extract. Overall, the average hydrodynamic diameters of the AgNPs were similar among the samples (61.98 to 101.6 nm). Polydispersity index remained in the range of 0.2 to 0.4, indicating that colloidal stability did not change with storage time. Zeta potential was above -30 mV after one month of analysis, which is adequate for biological applications. TEM images showed AgNPs with diameters between 40.72 to 48.85 nm and particles of different morphologies. EDX indicated silver content by weight between 24.06 and 28.81%. The synthesized AgNPs exhibited antimicrobial efficacy against various pathogenic microorganisms of clinical and environmental interest, with MIC values between 2.12 and 21.25 µg/mL, which is close to those described for MBC values. Therefore, our results revealed the potential use of a native species of plant from Brazilian biodiversity combined with nanotechnology to produce antimicrobial agents.
Collapse
Affiliation(s)
- Alan Kelbis Oliveira Lima
- Nanobiotechnology Laboratory, Institute of Biological Sciences, University of Brasilia (UnB), Brasilia 70910-900, DF, Brazil; (A.K.O.L.); (M.P.G.)
- Brazilian Agricultural Research Corporation (EMBRAPA), Embrapa Agroenergy, Brasilia 70770-901, DF, Brazil; (J.A.d.A.R.); (C.M.R.)
| | - Lucas Marcelino dos Santos Souza
- Basic and Applied Bacteriology Laboratory, State University of Londrina (UEL), Londrina 86057-970, PR, Brazil; (L.M.d.S.S.); (G.N.)
| | - Guilherme Fonseca Reis
- Postgraduate Studies in Bioprocess Engineering and Biotechnology, Federal University of Paraná (UFPR), Palotina 85950-000, PR, Brazil;
| | - Alberto Gomes Tavares Junior
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-901, SP, Brazil; (A.G.T.J.); (V.H.S.A.); (M.C.)
| | - Victor Hugo Sousa Araújo
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-901, SP, Brazil; (A.G.T.J.); (V.H.S.A.); (M.C.)
| | - Lucas Carvalho dos Santos
- Laboratory for the Isolation and Transformation of Organic Molecules, Institute of Chemistry, University of Brasília (UnB), Brasilia 70910-900, DF, Brazil;
| | - Vitória Regina Pereira da Silva
- Post-Graduate Program in Pharmaceuticals Sciences, Faculty of Health Sciences, University of Brasilia (UnB), Brasilia 70910-900, DF, Brazil;
| | - Marlus Chorilli
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-901, SP, Brazil; (A.G.T.J.); (V.H.S.A.); (M.C.)
| | - Hugo de Campos Braga
- Institute of Science and Technology, Federal University of São Paulo (UNIFESP), São Jose dos Campos 12231-280, SP, Brazil; (H.d.C.B.); (D.B.T.)
| | - Dayane Batista Tada
- Institute of Science and Technology, Federal University of São Paulo (UNIFESP), São Jose dos Campos 12231-280, SP, Brazil; (H.d.C.B.); (D.B.T.)
| | - José Antônio de Aquino Ribeiro
- Brazilian Agricultural Research Corporation (EMBRAPA), Embrapa Agroenergy, Brasilia 70770-901, DF, Brazil; (J.A.d.A.R.); (C.M.R.)
| | - Clenilson Martins Rodrigues
- Brazilian Agricultural Research Corporation (EMBRAPA), Embrapa Agroenergy, Brasilia 70770-901, DF, Brazil; (J.A.d.A.R.); (C.M.R.)
| | - Gerson Nakazato
- Basic and Applied Bacteriology Laboratory, State University of Londrina (UEL), Londrina 86057-970, PR, Brazil; (L.M.d.S.S.); (G.N.)
| | | | - Mônica Pereira Garcia
- Nanobiotechnology Laboratory, Institute of Biological Sciences, University of Brasilia (UnB), Brasilia 70910-900, DF, Brazil; (A.K.O.L.); (M.P.G.)
| |
Collapse
|
4
|
Rauwel E, Arya G, Praakle K, Rauwel P. Use of Aloe Vera Gel as Media to Assess Antimicrobial Activity and Development of Antimicrobial Nanocomposites. Int J Mol Sci 2024; 25:5599. [PMID: 38891787 PMCID: PMC11171552 DOI: 10.3390/ijms25115599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/01/2024] [Accepted: 05/17/2024] [Indexed: 06/21/2024] Open
Abstract
Antimicrobial resistance is a menace to public health on a global scale. In this regard, nanomaterials exhibiting antimicrobial properties represent a promising solution. Both metal and metal oxide nanomaterials are suitable candidates, even though their mechanisms of action vary. Multiple antimicrobial mechanisms can occur simultaneously or independently; this includes either direct contact with the pathogens, nanomaterial uptake, oxidative stress, ion release, or any of their combinations. However, due to their specific properties and more particularly fast settling, existing methods to study the antimicrobial properties of nanoparticles have not been specifically adapted in some cases. The development of methodologies that can assess the antimicrobial properties of metallic nanomaterials accurately is necessary. A cost-effective methodology with a straightforward set-up that enables the easy and quick assessment of the antimicrobial properties of metal nanoparticles with high accuracy has been developed. The methodology is also capable of confirming whether the killing mechanism involves ionic diffusion. Finally, Aloe Vera gel showed good properties for use as a medium for the development of antimicrobial ointment.
Collapse
Affiliation(s)
- Erwan Rauwel
- Institute of Veterinary Medicine & Animal Sciences, Kreutzwaldi 62, 51006 Tartu, Estonia;
- Institute of Forestry and Engineering, Kreutzwaldi 56/1, 51006 Tartu, Estonia; (G.A.); (P.R.)
| | - Geeta Arya
- Institute of Forestry and Engineering, Kreutzwaldi 56/1, 51006 Tartu, Estonia; (G.A.); (P.R.)
| | - Kristi Praakle
- Institute of Veterinary Medicine & Animal Sciences, Kreutzwaldi 62, 51006 Tartu, Estonia;
| | - Protima Rauwel
- Institute of Forestry and Engineering, Kreutzwaldi 56/1, 51006 Tartu, Estonia; (G.A.); (P.R.)
| |
Collapse
|
5
|
Unnikrishnan G, Joy A, Megha M, Kolanthai E, Senthilkumar M. Exploration of inorganic nanoparticles for revolutionary drug delivery applications: a critical review. DISCOVER NANO 2023; 18:157. [PMID: 38112849 PMCID: PMC10730791 DOI: 10.1186/s11671-023-03943-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 12/12/2023] [Indexed: 12/21/2023]
Abstract
The nanosystems for delivering drugs which have evolved with time, are being designed for greater drug efficiency and lesser side-effects, and are also complemented by the advancement of numerous innovative materials. In comparison to the organic nanoparticles, the inorganic nanoparticles are stable, have a wide range of physicochemical, mechanical, magnetic, and optical characteristics, and also have the capability to get modified using some ligands to enrich their attraction towards the molecules at the target site, which makes them appealing for bio-imaging and drug delivery applications. One of the strong benefits of using the inorganic nanoparticles-drug conjugate is the possibility of delivering the drugs to the affected cells locally, thus reducing the side-effects like cytotoxicity, and facilitating a higher efficacy of the therapeutic drug. This review features the direct and indirect effects of such inorganic nanoparticles like gold, silver, graphene-based, hydroxyapatite, iron oxide, ZnO, and CeO2 nanoparticles in developing effective drug carrier systems. This article has remarked the peculiarities of these nanoparticle-based systems in pulmonary, ocular, wound healing, and antibacterial drug deliveries as well as in delivering drugs across Blood-Brain-Barrier (BBB) and acting as agents for cancer theranostics. Additionally, the article sheds light on the plausible modifications that can be carried out on the inorganic nanoparticles, from a researcher's perspective, which could open a new pathway.
Collapse
Affiliation(s)
- Gayathri Unnikrishnan
- Department of Physics, Karunya Institute of Technology and Sciences, Coimbatore, India
| | - Anjumol Joy
- Department of Physics, Karunya Institute of Technology and Sciences, Coimbatore, India
| | - M Megha
- Department of Physics, Karunya Institute of Technology and Sciences, Coimbatore, India
| | - Elayaraja Kolanthai
- Department of Materials Sciences and Engineering, Advanced Materials Processing and Analysis Centre, University of Central Florida, Orlando, FL, USA.
| | - M Senthilkumar
- Department of Physics, Karunya Institute of Technology and Sciences, Coimbatore, India.
| |
Collapse
|