Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 159 for “"silver nanoparticles"”.
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Silver Nanoparticles As Drug Delivery Systems
… is to study the potential applications of silver nanoparticles (SNPs) in the medical device and pharmaceutical industries. Bone cements have been used in the orthopedic surgeries for many years to anchor prosthetics while filling up the spaces between the prostheses and bone. Antibiotics …
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Synthesis and growth dynamics study of silver nanoparticles
… concept of shape-controlled synthesis of metal nanoparticles is investigated by considering the growth mechanism of metal nanoparticles. This thesis is divided into four chapters, chapter one presents a general introduction about various physiochemical aspects of nanornaterials. The different …
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The impact of silver nanoparticles on plant physiology
Engineered nanoparticles (ENPs) are increasingly being exploited in a whole range of applications and products due to their novel physicochemistry. Hence it is inevitable that ENPs will enter the environment at an increasing rate over the coming years. The consequential impact following interaction …
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Biosynthesis and characterization of silver nanoparticles by fungi
Τα νανοσωματίδια αργύρου (AgNPs) έχουν προσελκύσει σημαντικό ενδιαφέρον λόγω του ευρέος φάσματος της αντιμικροβιακής τους δράσης και της πιθανής εφαρμογής τους στην ασφάλεια τροφίμων και στις τεχνολογίες συσκευασίας. Στη μελέτη αυτή αναπτύχθηκε μία οικολογικά φιλική προσέγγιση βιοσύνθεσης, …
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Synthesis of monodisperse silver nanoparticles for antibacterial purposes
… these many millions of people may be improved. Silver nanoparticles have great potential in being used in water disinfection applications because of their high antibacterial activity and broad antimicrobial spectrum (Qu, Alvarez, & Li, 2013). Development in this area is critical, particularly in …
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Bioenabled Synthesis of Anisotropic Gold and Silver Nanoparticles
Anisotropic plasmonic noble metallic nanoparticles (APMNs) have received enormous attention due to their distinct geometric features and fascinating physicochemical properties. Owing in large part to their tailored localized surface plasmon resonance (LSPR) and the intensive electromagnetic field …
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Silver Nanoparticles and the Plant-Associating Abilities of Rhizobiaceae Bacteria
… antimicrobial properties. Specifically, silver nanoparticles (AgNPs) can demonstrate distinct physiochemical properties compared to bulk silver, including a large surface area to volume ratio that allows for higher reactivity with bacterial cell surfaces. AgNPs are being released into the …
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Effect of silver nanoparticles on planktonic and biofilm cell growth
Silver nanoparticles (Ag NPs) are one of the most widely used nanoparticles, most notably serving as an antimicrobial agent for sanitization and medical purposes. Despite of their widespread use, little was known about the environmental effect of silver nanoparticles. This research focused on the …
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Ecotoxicity of silver nanoparticles on estuarine and coastal bacterial communities
The increasing use of silver nanoparticles (AgNPs) as a biocidal agent and their potential accumulation in coastal environments may threaten non-target natural environmental bacterial communities. For this reason the main aim of this PhD project was to examine the effects of AgNPs on the …
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An Evaluation of Coating Material Dependent Toxicity of Silver Nanoparticles
<p>Silver nanoparticles (AgNPs) synthesized using numerous types of coating materials may exhibit different toxicity effects. The study evaluated coating material dependent toxicity by selecting 3 types of AgNP synthesis methods with different coating materials (citrate, polyvinyl pyrrolidone, and …
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The impacts of silver nanoparticles on planktonic and biofilm bacteria
Nanoscale silver particles represent a new generation of cost-effective antibacterial technologies. Due to the increased manufacturing and use of silver nanoparticles (Ag NPs) in consumer goods their release and accumulation into the environment is highly likely but their fate, behaviour and …
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Towards Combined Computational and Experimental Studies on Toxicity of Silver Nanoparticles
<p>Despite the growing applications of silver nanoparticles, toxicity information on this nanomaterial is still deficient. Conclusions on the toxicity of silver nanoparticles vary and atomic level toxicity mechanisms are not yet achieved. Consequently, our group conducted combined computational and …
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Effects of silver nanoparticles on photochemical processes focusing on luminol chemiluminescence
<p>Silver nanoparticles of varying sizes were synthesized. Their effects on enhancing or quenching the photochemical processes of tryptophan fluorescence, a ruthenium complex decay constant and chemiluminescence of luminol and ferricyanide, were studied. The tryptophan fluorescence was slightly …
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Modification and processing of glass and glass with embedded silver nanoparticles
… assisted dissolution of glass embedded with silver nanoparticles and the irradiation of glass embedded with silver nanoparticles. Each method will be adapted to present novel and widely applicable approaches to the modification of glass.<br/><br/>Thermal poling of glass will be used to create …
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Experiment-Based Quantitative Modeling for the Antibacterial Activity of Silver Nanoparticles
<p>Silver (Ag) has been well known for its antimicrobial activity for a long time. Recent research showed the potential of Ag nanoparticles as emerging antimicrobial agents. However, little quantitative analysis has been performed so far to decipher the mechanism of interaction between …
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Exploration of a template-directed approach for the synthesis of silver nanoparticles
… is to develop a facile one-pot synthesis of silver nanoparticles (AgNPs) using Tollens' reagent as a silver source. The project focuses on the preparation of a series of sugar triazole ligands to template the formation of monodisperse AgNPs in a size- and shape-controlled manner. Chapter 1 …
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Green synthesis, characterization and laser irradiation of silver nanoparticles and its bimetallic nanoparticles
Green synthesis of metallic nanoparticles offered an alternative and eco-friendly method for fabricating nanoparticles compared to chemical and physical methods. The current study aimed to manipulate silver nanoparticles (Ag NPs) synthesized in Murraya koenigii leaf extract to fabricate …
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Development of chitosan/alginate/silver nanoparticles hydrogel scaffold for soft tissue engineering applications
… based biodegradable scaffolds incorporated with silver nanoparticles (AgNPs) with enhanced mechanical properties and biosafe function is proposed. Different ratios of chitosan/alginate (Chi/Alg) were prepared and the effect of different ratio (1:1, 1:2 and 2:1) to the mechanical, biological …
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Nanoparticle toxicity and molecular mechanisms in fish: A case study with silver nanoparticles
<p>Nanoparticles (NPs) are widely used in a myriad of commercial and industrial products making their entry to the environment a likely event. NPs have unique physical-chemical properties that result from their small size and high surface area to volume ratio, making them highly reactive and …
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Inhibitory effects of Green synthesized Senna alexandrina silver nanoparticles (SAAgNPs) on Escherichia coli DnaK
… friendly and economically viable production of silver nanoparticles (AgNPs) through their application in green synthesis. However, Plant-derived nanoparticles may potentially have unique physicochemical characteristics. This study is significant in that it contributes to the understanding of the …
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