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CytoViva Hyperspectral Imaging for Comparing the Uptake and Transformation of AgNPs and Ag+ in MitochondriaSteingass, Kristina 01 September 2021 (has links)
No description available.
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Optical and microarray silver-gold based sensors for the detection of e.coli 0157:h7 in seawaterNqunq, Sphamandla January 2021 (has links)
>Magister Scientiae - MSc / Recently researchers reported that nanoparticles functionalised through chemical methods possess risks to the environment and to the human health since they use hazardous chemicals and produce toxic waste. The increasing demand of nanomaterials for application in the field of science require an alternative method for synthesis of nanomaterials that are environmentally friendly, eco-friendly and non-toxic. The present study describes the green synthesis method for functionalisation of nanomaterials. Green synthesis methods are considered as a novel approach for functionalisation of nanoparticles using biological sources. / 2022
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Efficient Dispersion of Coated Silver Nanoparticles in the Polymer MatrixEllison, Jordan, Wykoff, Greg, Paul, Anita, Mohseni, Ray, Vasiliev, Aleksey 05 April 2014 (has links)
Silver-polymer composite material containing highly dispersed silver nanoparticles (AgNPs) of 20-100. nm diameter can be obtained from bare nanosilver. The synthesis consists of three steps. The first step is modification of AgNPs by 2-aminoethanethiol. Second, polyacrylic acid is bonded to the silver 2-aminoethanethiolate by the carbodiimide method. Then esterification of the remaining carboxyl groups of the product by methanol results in formation of a stable colloidal dispersion of AgNPs in the polymer matrix. The method allows obtaining of nanocomposites with silver contents up to 1.4. wt%.
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Antifungal and cytotoxic potential of green synthesized silver nanoparticlesKlein, Widadh January 2021 (has links)
Magister Chirurgiae Dentium (MChD) / The rate at which the population is ageing is much faster than in the past. An increase in age results in an increase in oral diseases. One of the most common types of oral diseases in the elderly are fungal infections caused by Candida albicans. It has been noted that drug resistance to fungal pathogens is developing into a serious threat to public health and healthcare systems worldwide. This has consequently led to the need to develop effective and innocuous treatment modalities. The purpose of this study was to explore the antimicrobial and cytotoxic potential of silver nanoparticles (AgNPs) synthesised from Berzelia lanuginose, Helichrysum cymosum, and Searsia crenata.
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Analytical-Based Methodologies for Monitoring the Uptake, Distribution and Molecular Interaction of Silver Nanoparticles with Human Red Blood CellsHood, Kelsey L. January 2018 (has links)
No description available.
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Interactions of Organodithiols with Gold and Silver Nanoparticles in WaterGadogbe, Manuel 07 May 2016 (has links)
Organodithiols including para-aryl dithiols (PADTs, HS-(C6H4)n-SH, n = 1, 2 and 3) and alpha, omega-alkanedithiols (ADTs, HS-(CH2)n-SH, n = 2, 4, …) with two distal thiols have been used extensively in molecular electronics, surface-enhanced Raman spectroscopy (SERS), and quantum electron tunneling between two gold or silver nanoparticles (AuNPs and AgNPs). The popular belief is that these dithiols cross-link noble metal nanoparticles (NPs) as monolayer dithiolate spacers. Reported is the finding that PADTs predominantly exist as monothiolate forms on AuNPs or AgNPs. No PADT-induced NP cross-linking was observed regardless of NP/PADT concentration ratios. 1,4-benzenedimethanethiol (HS-CH2-(C6H4)-CH2-SH) and ADT can be completely deprotonated, forming dithiolates on AuNPs and AgNPs, while only one PADT thiol can be deprotonated even when PADTs are treated with concentrated NaOH or AgNO3. AuNP localized surface plasmon resonance (LSPR) measurement provides conclusive evidence that ADT in AuNP junctions primarily consisted of dithiolate monomers in which the two sulfides are either attached to the same AuNP, or cross-link two adjacent AuNPs as single-molecular spacers. However, ADT molecules most likely in the area surrounding the AuNP junction are monothiolate with their distal thiols either remaining intact or forming disulfide cross-links with neighboring adsorbed ADTs. The possibility for ADT to cross-link two AgNPs as single molecular linker is excluded on the basis of TEM measurements that showed ADT-induced AgNP disintegration. This work highlights the difference between organothiol interactions with AgNPs and AuNPs and should be of broad importance for plasmonic NP research given the popularity of PADTs in molecular electronics and SERS applications.
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Cloud Point Extraction in Conjunction with Tangential Flow Filtration (CPE-TFF) for the Enhanced Separation of Silver Nanoparticles and Silver Ions from Aqueous Colloids and Biological MatricesAkbar, Md Ali January 2017 (has links)
No description available.
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Chemical Applications in Techniques of Emerging Significance: Nanoparticle Transformation in Mitochondria and Relative Tautomer Populations in Cellular AutomataBowers, Gregory Arland January 2017 (has links)
No description available.
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<i>In-Vitro</i> Biocompatibility of Silver Nanoparticles Anchored on Multi-Walled Carbon NanotubesCastle, Alicia Brooks 29 September 2009 (has links)
No description available.
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Synthesis, Characterization and Manipulation of Creighton Silver Nanoparticles for Future Cytotoxicity StudiesPaluri, Sesha Lakshmi Arathi January 2011 (has links)
No description available.
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