Ulvan as novel reducing and stabilizing agent from renewable algal biomass: Application to green synthesis of silver nanoparticles

Massironi, Alessio; Morelli, Andrea; Grassi, Lucia; Puppi, Dario; Braccini, Simona; Maisetta, Giuseppantonio; Esin, Semih; Batoni, Giovanna; Pina, Cristina Della; Chiellini, Emo

doi:10.1016/j.carbpol.2018.09.066

Cited by 109 publications

(43 citation statements)

References 47 publications

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“…1,2 Silver nanoparticles (AgNPs) have unique physicochemical and biological characteristics with the high surface area due to the variable size ranges from 1 to 100 nm. 3 These unique characteristics of AgNPs have attracted globally and are considered a potent antimicrobial agent. It has been suggested that silver NPs has a significant antimicrobial activity due to multiple reasons including their high affinity with the surface active groups of microbial strains, released of silver ions can rapture the bacterial cell wall or distortion of bacterial DNA helical structure.…”

Section: Introductionmentioning

confidence: 99%

<p>Synergistic Nanocomposites of Different Antibiotics Coupled with Green Synthesized Chitosan-Based Silver Nanoparticles: Characterization, Antibacterial, in vivo Toxicological and Biodistribution Studies</p>

Asghar

Yousuf

Shoaib

et al. 2020

IJN

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The present study reports chitosan functionalized green synthesized CS-AgNPs, conjugated with amoxicillin (AMX), cefixime (CEF), and levofloxacin (LVX) for safe and enhanced antibacterial activity. Methods: The CS-AgNPs and conjugates CS-AgNPs+AMX CS-AgNPs+CEF, and CS-AgNPs+LVX were characterized by UV-Vis, FTIR, SEM, TEM, EDX spectroscopy. The size distribution and zeta potential were measured using the dynamic light scattering (DLS) technique. The interaction between CS-AgNPs and antibiotic molecules was also investigated using UV-Vis spectroscopy at the concentrations of 5, 50, 500, and 5000 µM for each antibiotic. Antibacterial activity and synergism were assessed by the Fractional Inhibitory Concentration (FIC) index. The mechanism for synergistic activity was investigated by the detection of hydroxyl species based on the chemiluminescence of luminol. The biocompatibility index (BI) was calculated from IC 50 using the HeLa cell line. In vivo toxicity and tissue distribution of silver ions were evaluated on Sprague Dawley rats. Physical interactions of antibiotics and significant (P<0.05) antibacterial activity were observed after loading on CS-AgNPs surfaces. Results: The spherical shape nanocomposites of CS-AgNPs with different antibiotics were prepared with mean size ranges of 80-120 nm. IC 50 of antibiotics-conjugated CS-AgNPs decreased compared to CS-AgNPs. The biocompatibility (BI) index showed that antibioticsconjugated CS-AgNPs have high antibacterial potential and low toxicity. Highly significant (P<0.005) increase in the generation of hydroxyl species indicated the radical scavenging mechanism for synergistic activity of CS-AgNPs after combined with different antibiotics. Biochemical analysis and histopathological examinations confirmed low toxicity with minor hepatotoxicity at higher doses. After oral administration, extensive distribution of Ag ion was observed in spleen and liver. Conclusion: The study demonstrates positive attributes of antibiotics-conjugated CS-AgNPs, as a promising antibacterial agent with low toxicity.

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Section: Introductionmentioning

confidence: 99%

<p>Synergistic Nanocomposites of Different Antibiotics Coupled with Green Synthesized Chitosan-Based Silver Nanoparticles: Characterization, Antibacterial, in vivo Toxicological and Biodistribution Studies</p>

Asghar

Yousuf

Shoaib

et al. 2020

IJN

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“…MA-fabricated AgNPs were having the least polydispersity (PDI) reported at 0.209, which shows that they have narrow or uniform dispersity (monodisperse), while MLL NPs (PDI 0.321) and MLB AgNPs (PDI: 0.426) reported moderate dispersity (moderately polydisperse). Our results are in the favor of following studies that report the synthesis of small size nanoparticles with moderate dispersity by using different plant materials (Ali et al, 2016;Massironi et al, 2019;Omran et al, 2019) 3.6 | Comparative analysis Table 1 represents the size of AgNPs measured by various characterization techniques, phytosynthesized by using different species of Lamiaceae family. SEM images showed that the AgNPs are small, nearly spherical, and have a size ≤100 nm, while the AFM images showed small and medium-size nanoparticles.…”

Section: Hydrodynamic Diameter Measurement Of Agnps (Dls Analysis)mentioning

confidence: 69%

Phytosynthesis of colloidal nanosilver from Mentha longifolia and Mentha arvensis: Comparative morphological and optical characterization

Javed

Mashwani

2020

Microscopy Res & Technique

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The present study involves an ecofriendly strategy for the reduction of bulk silver into its nanoforms by using the aqueous extracts of Mentha longifolia leaves (MLL), M. longifolia branches (MLB), and Mentha arvensis (MA). Synthesis of silver nanoparticles (AgNPs) was confirmed initially by observing a change in the color of the reaction mixture followed by measuring the absorbance, and a characteristic surface plasmon resonance band was observed between 400 and 500 nm of the λ of light. Morphological and optical characterization techniques of AgNPs were performed by using UV-visible spectrophotometer, scanning electron microscopy, atomic force microscopy, energy-dispersive X-ray spectroscopy (EDX), and dynamic light scattering (DLS) analysis. It was confirmed that the phytosynthesized nanoparticles are anisotropic and nearly spherical having a size smaller than 100 nm while some cubical and prismatic nanostructures were also observed. The average size of a single nanoparticle measured by DLS analysis was reported 10.50 nm, 15.55 nm, and 20.46 nm biofabricated by using MLB, MLL, and MA extract, respectively. The EDX analysis reported the presence of elemental Ag while elemental O was also observed in MLL and MLB AgNPs. The results from these experiments endorse the potential of reported plant species to phytosynthesize AgNPs. The future applications of this work involve the utilization of AgNPs for multiple biological applications.

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“…Among Chlorophyta, the genus Ulva spp. was reported in most of the studies against S. aureus [ 45 , 50 , 66 , 80 , 125 , 126 , 127 , 128 ]. Some studies compared solvent extraction performance for extraction of bioactive compounds: for C. socialis (MeOH > acetone) [ 118 ], U. flexuosa (ethylacetate > MeOH) and for U. rigida (ethanol > Hex> CHCl 3 ).…”

Section: Antibacterial Potential Of Bioactive Compounds From Macromentioning

confidence: 98%

Antibacterial Use of Macroalgae Compounds against Foodborne Pathogens

Silva

Lourenço-Lopes

et al. 2020

Antibiotics

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The search for food resources is a constant in human history. Nowadays, the search for natural and safe food supplies is of foremost importance. Accordingly, there is a renewed interest in eco-friendly and natural products for substitution of synthetic additives. In addition, microbial contamination of food products during their obtaining and distribution processes is still a sanitary issue, and an important target for the food industry is to avoid food contamination and its related foodborne illnesses. These diseases are fundamentally caused by certain microorganisms listed in this review and classified according to their Gram negative or positive character. Algae have proven to possess high nutritional value and a wide variety of biological properties due to their content in active compounds. Among these capabilities, macroalgae are recognized for having antimicrobial properties. Thus, the present paper revises the actual knowledge of microbial contaminants in the food industry and proposes antimicrobial algal compounds against those pathogenic bacteria responsible for food contamination as valuable molecules for its growth inhibition. The capacity of algae extracts to inhibit some major food pathogen growth was assessed. Moreover, the main applications of these compounds in the food industry were discussed while considering their favorable effects in terms of food safety and quality control.

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Ulvan as novel reducing and stabilizing agent from renewable algal biomass: Application to green synthesis of silver nanoparticles

Cited by 109 publications

References 47 publications

<p>Synergistic Nanocomposites of Different Antibiotics Coupled with Green Synthesized Chitosan-Based Silver Nanoparticles: Characterization, Antibacterial, in vivo Toxicological and Biodistribution Studies</p>

<p>Synergistic Nanocomposites of Different Antibiotics Coupled with Green Synthesized Chitosan-Based Silver Nanoparticles: Characterization, Antibacterial, in vivo Toxicological and Biodistribution Studies</p>

Phytosynthesis of colloidal nanosilver from Mentha longifolia and Mentha arvensis: Comparative morphological and optical characterization

Antibacterial Use of Macroalgae Compounds against Foodborne Pathogens

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