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Dissertations / Theses on the topic 'Antimicrobial propertie'

Author: Grafiati

Published: 7 July 2024

Last updated: 31 July 2025

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1

Prats, Ejarque Guillem. "Exploring the pharmacological properties of human antimicrobial ribonucleases." Doctoral thesis, Universitat Autònoma de Barcelona, 2021. http://hdl.handle.net/10803/671628.

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Aquesta tesi s’enfoca en la caracterització estructural i funcional de les propietats biològiques de les RNases antimicrobianes de la superfamília de la RNasa A. Concretament, s’han assolit els següents objectius a curt termini: La caracterització estructural i funcional de la RNasa 6 per cristal·lografia de raigs X, dinàmica molecular, mutagènesi dirigida i anàlisis enzimàtics destaca el paper clau de les regions remotes d’unió al substrat. A part, hem identificat un possible segon centre actiu en la RNasa 6. Finalment, un estudi evolutiu dels diversos membres de la superfamília de la RNasa

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Cai, Zhiwei. "Nouveaux matériaux à base de polyoxotitanates (POTs) dopé ou à base de complexe salicylate de titane (IV) et d'argent (I)." Electronic Thesis or Diss., Strasbourg, 2023. http://www.theses.fr/2023STRAF062.

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Ces dernières années, le dioxyde de titane a attiré beaucoup d'attention en tant que matériau hautement stable avec une large gamme d'applications allant du pigment blanc à des applications en tant que semi-conducteur ou dispositifs photoniques de pointe. En utilisant des approches synthétiques récemment développées, la synthèse de molécules cages de type polyoxotitanate (POT, [TixOy(OR)z]) atomiquement bien définies peut être menée. Les POTs peuvent être considérés comme des modèles solubles du TiO2. Des cages dopées avec un métal M (M-POT) présentant de nouvelles propriétés peuvent être auss

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3

Cinar, Dursun. "Purification and antimicrobial properties of oleuropein." Thesis, University of West London, 2009. https://repository.uwl.ac.uk/id/eprint/381/.

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Olive leaves contain substantial amounts of phenolic substances, including the polyphenol oleuropein. This compound has been reported to possess antimicrobial properties. The purpose of this study was to develop an improved method for the extraction and purification of oleuropein from olive leaves and characterise its activity as well as the mode of action against a range of bacteria. Phenolic compounds from olive leaves were extracted in methanol and oleuropein was separated from the mixture by countercurrent chromatography (CCC). Separation was confirmed by high performance liquid chromatogr

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4

Nilebäck, Linnea. "Recombinant spider silk with antimicrobial properties." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-102804.

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Immobilizing antimicrobial substances onto biocompatible materials is an important approach for the design of novel, functionalized medical devices. By choosing antimicrobial substances from innate immune systems, the risk for development of resistance in pathogenic microbes is lower than if conventional antibiotics are used. Combining natural antimicrobial peptides and bactericidal enzymes with strong and elastic spider silk through recombinant protein technology would enable large-scale production of materials that could serve as functionalized wound dressings. Herein, fusion proteins with t

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5

Bortolin, M. "ANTIMICROBIAL PROPERTIES OF PLATELET-RICH PLASMA." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/233150.

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Autologous platelet concentrates have been widely used in various medical fields in order to promote tissue regeneration. The significance behind their use lies in the presence of growth factors in platelets α-granules that enhance wound healing by promoting cell chemotaxis, proliferation and differentiation. In addition, anti-inflammatory and antibacterial properties of platelet concentrates have been recently pointed out. In this study, the antimicrobial effect of pure platelet-rich plasma (P-PRP) was evaluated against microorganisms isolated from oral cavity, such as Candida albicans, Ent

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6

Khadambi, Tshiwela Norah. "Antimicrobial properties of phenolic compounds from sorghum." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-03022007-164705.

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7

Parr, J. A. "Antimicrobial properties of silicone quaternary ammonium compounds." Thesis, Bucks New University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375600.

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8

Liu, Harris K. (Harris Ken-Ming). "New immobilized antimicrobial polyethylenimines : synthesis and properties." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/93039.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Chemistry, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Surfaces modified with immobilized N-alkyl-polyethylenimines (N-alkyl-PEls) containing various alkyl groups were synthesized and tested against various pathogenic human influenza viruses to establish structure-to-virucidal activity relationships. Various physical-chemical properties of each surface were correlated with their virucidal activities to identify key antiviral surface properties. The accessibility of N-alkyl-PEI quate

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9

Sharma, Shagun. "Investigation of Antimicrobial Properties of Spider Silk." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1418647204.

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10

Desai, Prerak T. "Antimicrobial Properties of Syringopeptin 25A and Rhamnolipids." DigitalCommons@USU, 2006. https://digitalcommons.usu.edu/etd/5526.

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The increasing bacterial resistance to available antibiotics requires the search for new antibacterial compounds to be broadened. This study investigated the antimicrobial properties of two secondary metabolites from fluorescent pseudo monads -- syringopeptin 25A, a lipodepsipeptide produced by Pseudomonas syringae pv. syringae, and a rhamnolipid mixture produced by Pseudomonas aeruginosa. The rate of antimicrobial action was determined by monitoring the rate of uptake of propidium iodide during exposure to the compounds. Inhibition was also confirmed by the microbroth dilution method to deter

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11

Mwangi, Henry Maina. "Phytochemical and antimicrobial studies on Rhus natalensis." Thesis, University of the Western Cape, 2011. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3552_1365671232.

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<p>Extracts from the root bark, stem bark, and leaves of R. natalensis were screened for antibacterial activity against standard bacterial strains<br>Staphylococcus aureas, Escherichia coli and Pseudomonas aureginosa, and fungi<br>Candida albicans, Trichophyton mentagrophytes or Microsporum gyseum. Chromatographic techniques were utilized to isolate pure compounds. This study validates and documents, in a systematic way, the antimicrobial properties of the R. natalensis used for many years by many people of the world. It also provides valuable information for&nbsp<br>further phytochemical isol

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12

Gule, Nonjabulo Prudence. "Electrospun antimicrobial and antibiofouling nanofibres." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/18057.

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Thesis (PhD)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: The main objective of this study was to develop electrospun nanofibres with both antimicrobial and antibiofouling properties for possible application in water filtration. To do this, two routes were investigated: firstly, the use of biocides and bactericidal copper salts to introduce bactericidal properties on electrospun nanofibres. Secondly, the modification of polymers using furanone compounds to obtain nanofibres with the ability to repel microbial attachment. Fabrication of biocide-containing PVA nanofibres was successful.

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13

Rodrigues, Maria do Livramento Linhares. "Tilapia skin Gelatin: Alternative for obtaining films with antimicrobial property by nanosilver incorporation." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=14546.

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CoordenaÃÃo de AperfeiÃoamento de NÃvel Superior<br>An alternative for the recovery of industrial fish waste is the production of films, which can be applied in food packaging. However, a major challenge is to obtain films with antimicrobial properties aiding in increased food shelf life as well as films with good mechanical properties and barriers. Therefore, in order to improve these limitations, silver nanoparticles were used due to its potential antimicrobial in food, and tannic acid (TA) as crosslinker in order to improve the mechanical and barrier properties. This study focuses in the ex

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14

Page, Kristopher. "Photocatalytic thin films : their characterisation and antimicrobial properties." Thesis, University College London (University of London), 2009. http://discovery.ucl.ac.uk/17547/.

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This thesis is concerned with the synthesis and characterisation of TiO2 based photocatalyst thin films and the assessment of their antimicrobial properties. When exposed to light of wavelength less than 380 nm TiO2 films can demonstrate self-cleaning and self-disinfecting properties. This is due to photocatalytic processes occurring on the film surface resulting in film superhydrophilicity and reactive oxygen species (ROS) production. These ROS and radicals readily oxidise organic pollutants and microbes adherent to the material surface. Consequently, TiO2 thin films are of great research int

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15

Wallock-Richards, Daynea Juaneckah. "Natural products : biosynthesis, antimicrobial properties and protein targets." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/14188.

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The diversity of biosynthetic pathways in prokaryotes and eukaryotes has led to numerous bioactive natural products (NPs) which occupy a vast chemical space. Despite the current challenges in NP research, these molecules are still relevant today as they are a major source of human medicine as well as being useful biological tools. The elucidation of their biosynthetic pathways has also provided information about the biochemical and biophysical properties of fascinating enzyme families such as the α- oxoamine synthases (AOSs). The AOSs are an expanding group of pyridoxal 5’- phosphate (PLP)-dep

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16

Oriani, Vivian Boesso 1986. "Desenvolvimento e caracterização de coberturas comestíveis à base de fécula de mandioca adicionadas de óleos essenciais." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/255153.

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Orientador: Miriam Dupas Hubinger<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-22T05:48:31Z (GMT). No. of bitstreams: 1 Oriani_VivianBoesso_M.pdf: 12741078 bytes, checksum: 5f41652e5d2d38885c526edf6c2e0cf7 (MD5) Previous issue date: 2013<br>Resumo: Coberturas comestíveis foram desenvolvidas e caracterizadas pela combinação de fécula de mandioca (2 e 3% p/v) com óleos essenciais de casca de canela (Cinnamomum zeylanicum) (0,05 a 0,30% v / v) ou de erva doce (Foeniculum vulgare L.) (0,05-0,30 % v / v)

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17

Erkan, Arcan. "Investigation Of Thin Semiconductor Coatings And Their Antimicrobial Properties." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/3/12606306/index.pdf.

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Regular disinfection of surfaces is required in order to reduce the number of microorganisms, unable to transmit infections and maintaining the surfaces sterilized. For this purpose, antimicrobial thin film coatings on the various surfaces such as glass and ceramic surfaces, capable of killing harmful microorganisms are being investigated. Generally a semiconducting material which can be activated by UV light tends to exhibit a strong antimicrobial activity. With holes (h+) and hydroxyl radicals (OH*) generated in the valence band, electrons and the superoxide ions (O2-) generated in the cond

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18

Vangala, Lakshmisri Manisha. "Size Dependent Antimicrobial Properties of Sugar Encapsulated Gold Nanoparticles." TopSCHOLAR®, 2012. http://digitalcommons.wku.edu/theses/1166.

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The antimicrobial properties of dextrose encapsulated gold nanoparticles (dGNPs) with average diameters of 25 nm, 60 nm, and 120 nm (± 5 nm) synthesized by green chemistry principles were investigated against both Gram-negative and Gram-positive bacteria. Studies were performed involving the effect of the dGNPs on the growth, morphology and the ultrastructural properties of bacteria. dGNPs were found to have significant dose dependent antibacterial activity which was directly proportional to their size and also their concentration. The microbial assays revealed the dGNPs to be bacteriostatic a

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19

Amengor, Dzifa. "Antimicrobial Properties of Verbesina negrensis Extracts against Helicobacter pylori." Thesis, Southern Illinois University at Edwardsville, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10792975.

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<p> <i>Helicobacter pylori</i> is a bacterium that can cause chronic gastritis and gastrointestinal cancers in some infected people due to the overexpression of inflammatory cytokines and oxidative stress resulting from accumulation of reactive oxygen species. <i>Verbesina negrensis</i> is a plant that is routinely used in the treatment of gastric complaints. The purpose of this research is to isolate pure bioactive compounds from <i> V. negrensis</i> and evaluate the antimicrobial properties of the isolates against <i>H. pylori</i>. Additionally, we will determine the toxicity of the plant ex

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20

Song, Ronghui. "Synthesis, Characterization and Antimicrobial Properties of Novel Naphthoquinone Derivatives." Kent State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=kent1586783242508385.

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21

Rosa, Marguerita Evangelho da. "Production and purification of IgY antibodies with antimicrobial properties." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22545.

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Mestrado em Biotecnologia - Biotecnologia Industrial e Ambiental<br>A Aquacultura tem recebido especial destaque nos últimos anos como alternativa às atividades de pesca tradicional, atualmente restritas pelos limites legais de captura. Neste sentido, têm-se desenvolvido novas técnicas de modo a aumentar o lucro e o rendimento das atividades associadas à aquacultura. No entanto, a sobre-exploração de espécies, poluição, surgimento de doenças e o aumento de microorganismos resistentes a antibióticos, surgem como consequências deste desenvolvimento. Vibrio anguillarum é uma bactéria Gram-negativ

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22

Sandhu, Guneev. "Characterization of Lactose Esters for Their Antimicrobial and Emulsification Properties." DigitalCommons@USU, 2014. https://digitalcommons.usu.edu/etd/3855.

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Sucrose esters have an established use in food industry as emulsifiers. Two novel lactose esters (lactose monodecanoate and lactose monomyristate) were synthesized and studied for their antimicrobial and emulsification properties. Lactose is a byproduct in cheese production and is an inexpensive carbohydrate source. The antimicrobial activity of lactose monodecanoate (LMD) and lactose monomyristate (LMM) was tested against the growth of seven different bacteria. Both esters, when dissolved in dimethoxy sulfoxide (DMSO), proved bactericidal against Bacillus cereus, Mycobacteria KMS and Streptoc

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23

Schwartz, Véronique Bernadette [Verfasser]. "Design of nanoparticle systems with antimicrobial properties / Véronique Bernadette Schwartz." Mainz : Universitätsbibliothek Mainz, 2012. http://d-nb.info/1019668938/34.

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24

Smith-Palmer, Mary Alison. "The antimicrobial properties of plant essential oils against foodborne pathogens." Thesis, Queen Margaret University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327082.

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25

Belkhair, Sama Salem. "Antimicrobial properties of Ag zeolites and Ag zeolite containing polymers." Thesis, Manchester Metropolitan University, 2016. http://e-space.mmu.ac.uk/617118/.

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Ag zeolites have been studied in this thesis for antibacterial applications in powder form or in composite materials. The influence of the textural characteristics (crystal size and mesoporosity) of silver-exchanged FAU- and BEA-type zeolites on their antimicrobial efficacy was studied. Two pairs of zeolite X and zeolite beta with different sizes as well as a mesoporous zeolite beta were tested against Escherichia coli (E. coli) and Candida albicans (C. albicans). Reduction of crystal size resulted in a slight decrease in the killing efficacy against both microorganisms. Zeolite beta showed hi

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26

BERTON, FEDERICO. "BIORESORBABLE ENGINEERED MEMBRANES FOR GUIDED BONE REGENERATION WITH ANTIMICROBIAL PROPERTIES." Doctoral thesis, Università degli Studi di Trieste, 2020. http://hdl.handle.net/11368/2963760.

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Gli argomenti principali di questa tesi di dottorato sono la rigenerazione ossea e l'analisi del tessuto osseo mediante strategie nanotecnologiche per entrambi gli scopi. In breve, sono stati esplorati lo sviluppo di membrane e impalcature nanostrutturate per le procedure di rigenerazione ossea nella chirurgia orale, insieme all'ottimizzazione dei protocolli di analisi su micro e nanoscala. Sono stati acquisiti, assemblati e testati i componenti necessari per il processo ELS. Sono state testate diverse combinazioni di solventi per la preparazione di membrane a base di policaprolattone (PCL). S

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27

Chindera, Kantaraja. "Cell uptake properties of Polyhexamethylene Biguanide (PHMB) and applications in intracellular delivery." Thesis, Royal Veterinary College (University of London), 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618319.

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28

Gilles, Martin. "Screening of the antimicrobial properties of four Australian native Eucalyptus species /." Sion, 2007. http://doc.rero.ch/search.py?recid=8350&ln=fr.

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29

Fitzgerald, Daniel J. "Investigation of the antimicrobial properties of the phenolic flavour compound vanillin." Thesis, University of East Anglia, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273578.

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30

Gledhill, L. "Antimicrobial and beta-lactamase inhibitory properties of chlorinated 6-spiro-epoxypenicillins." Thesis, University of Nottingham, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233715.

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31

Wong, Sze Yinn (Sze Yinn Jessie). "Polyelectrolyte multilayer thin films with antimicrobial, antifouling and drug releasing properties." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/65768.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 152-160).<br>This thesis work focuses on designing thin polyelectrolyte multilayer (PEM) films via layer-bylayer (LbL) deposition technique with the ability to kill pathogenic bacteria and inactivate human viruses, especially the influenza (flu) virus on contact. This work builds on four years of research at the Institute for Soldier Nanotechnologies (ISN) focusing on creating new, nonleaching microbicidal material; thi

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32

Melaiye, Abdulkareem M. "Synthesis and Antimicrobial Properties of Silver(I) N-Heterocyclic Carbene Complexes." University of Akron / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=akron1124310734.

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33

Mody, Shreena Himanshu. "The Antimicrobial Properties of Honey and Their Effect on Pathogenic Bacteria." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7042.

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Honey has been used to heal wounds since ancient times. There are many references in ancient literature that cite honey for its medicinal uses. It is used as an alternative agent to cure infections of wounds, burns, ulcers etc. Researchers have shown some of the antimicrobial properties of honey when used as an ointment. When applied to an affected area, it helps to promote the growth of healthy tissue. One of the factors on which the quality of the honey depends, is its geographical origin. Based on the location, honey types can vary as much as 100-fold from each other in color, aroma, viscos

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Bensaci, Mekki F. "The Bioactive Properties of Syringomycin E-Rhamnolipid Mixtures and Syringopeptins." DigitalCommons@USU, 2009. https://digitalcommons.usu.edu/etd/247.

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The need for new antimicrobial agents has become important in the last decade due to emerging resistance to a number of conventional antimicrobial agents. New approaches and sources are needed to generate novel and effective antimicrobials. For example, synergistic combinations between two or more agents may lead to new antimicrobial therapies. Furthermore, the increase in health problems caused by the exposure to agricultural crop pesticides and synthetic fungicides and the emerging development of organic farming has increased the necessity to develop natural products than can be used safel

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35

Zhang, Manrui. "Studies of a click reaction route to antimicrobial polymer latexes." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/studies-of-a-click-reaction-route-to-antimicrobial-polymer-latexes(b6c2b634-ec41-44b6-a88f-2d908e1f422c).html.

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The objective of this project was to prepare alkyne-functionalized polymer latexes using surfactant-free emulsion polymerization, and then functionalize these polymer latexes with three quaternary ammonium azides via Cu(I)-catalyzed azide/alkyne cycloaddition (CuAAC) in order to produce antimicrobial polymer latexes. Three quaternary ammonium azides with different linear alkyl chain lengths (C4, C8 and C12) were successfully synthesised in high yield ( > 70%) using established procedures, and their purity determined by elemental analysis, Fourier transform infrared (FTIR) spectroscopy and nucl

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36

Xu, Youhong. "Adaptive immune response-modifying and antimicrobial properties of Andrographis paniculata and andrographolide." University of Southern Queensland, Faculty of Sciences, 2009. http://eprints.usq.edu.au/archive/00005134/.

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Andrographis paniculata (AP) is a traditional herbal medicine which is widely used for the treatment of many diseases in Asia. Recently, various biological activities of AP extract or andrographolide (AND), such as immunostimulatory activity, anti-inflammatoryeffect, cytokine induction or deduction, a potential cancer therapeutic agent and T cell activation suppression, have been reported. However the potential ofAP extract or AND to stimulate the specific or adaptive immune response using microbial vaccines has not been determined. In this project, AND has been purifiedfrom AP and its identit

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Kwok, Hoi-shan, and 郭凱珊. "The comparison of biological properties of L- and D-enantiomeric antimicrobial peptides." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206507.

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Antibiotics have been used widely for the treatment of bacterial infections for over half a century. However, the emergence of resistance to antibiotics has aroused public health concern, leading to the development of antimicrobial peptides (AMPs) as potential alternative therapeutic agents against bacterial infections. AMPs are naturally found in many species and have important roles in our innate immune defense systems. AMPs are usually cationic amphipathic peptides with membrane destabilizing property. They have a relatively broad spectrum of antimicrobial activity and pathogens are less li

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Mann, Maryssa Gudrun Ailsa. "An investigation of the antimicrobial and antifouling properties of marine algal metabolites." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1007465.

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Prevention of the accumulation of undesirable biological material i.e. biofouling upon a solid surface requires the use of antifouling systems. The solid surface may be a contact lens, an off shore oil rig or a living organism. When chemicals are employed as a mechanism of defense against biofouling, the agents involved are known as antifouling agents. Marine algae must protect themselves from fouling organisms and it is thought that one of the mechanisms used by these organisms is the production of secondary metabolites with an array of biological activities. In vitro studies have shown numer

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Hetrick, Evan M. Schoenfisch Mark H. "Antimicrobial and wound healing properties of nitric oxidereleasing xerogels and silica nanoparticles." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2008. http://dc.lib.unc.edu/u?/etd,1928.

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Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2008.<br>Title from electronic title page (viewed Dec. 11, 2008). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Chemistry Analytical Chemistry." Discipline: Chemistry; Department/School: Chemistry.

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Torrey, Jason Robert. "Antimicrobial Properties Of Metal And Metal-Halide Nanoparticles And Their Potential Applications." Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/338682.

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Heavy metals have been known to possess antimicrobial properties against bacterial, fungal, and viral pathogens. Silver and copper in particular have been used for millennia to control bacterial and fungal contamination. Metal nanoparticles (aggregations of metal atoms 1-200 nm in size) have recently become the subject of intensive study for their increased antimicrobial properties due to their increased surface area and localized release of metal ions when attached to pathogens. In the current studies, metal and metalhalide nanoparticles including silver (Ag), silver bromide (AgBr), silver io

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Korshed, Peri. "The molecular mechanisms of the antimicrobial properties of laser processed nano-particles." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/the-molecular-mechanisms-of-the-antimicrobial-properties-of-laser-processed-nanoparticles(731afee1-17f3-4698-b182-b604fb48492f).html.

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Microbial resistance to the current available antibiotics is considered a global health problem, especially for the Multi-Drug Resistant pathogens (MDR) including methicillin resistant Staphylococcus aureus. Recently nanoparticles (NPs) have been involved in variety of antimicrobial applications due to their unique properties of antibacterial effects. However, the molecular mechanisms behind their antibacterial activity are still not fully understood. In this study, we produced silver Ag NPs (average size 27 nm) and silver-Titanium Ag-TiO2 NPs (average size 47 nm) using picosecond laser ablati

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Dodge, Luke A. "FRACTIONATION OF LIGNIN DERIVED COMPOUNDS FROM THERMOCHEMICALLY PROCESSED LIGNIN TOWARDS ANTIMICROBIAL PROPERTIES." UKnowledge, 2018. https://uknowledge.uky.edu/bae_etds/54.

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The overuse of antibiotics in agriculture is an emerging concern, due to their potential detrimental impact to the environment. This study focuses on exploring antimicrobial properties of lignin derived compounds. Lignin is of interest as a feedstock to replacing some petroleum-based chemicals and products because it is the most abundant source of renewable aromatic compounds on the planet. Two lignin rich streams, residues from the enzymatic hydrolysis of dilute acid and alkaline pretreated corn stover, were decomposed via pyrolysis and hydrogenolysis, respectively. The resulting liquid oils

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Munir, Muhammad Tanveer. "Wood and hospital hygiene : Investigating the hygienic safety and antimicrobial properties of wood materials." Thesis, Ecole centrale de Nantes, 2021. http://www.theses.fr/2021ECDN0008.

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Le matériau bois est un composant bien connu des thèmes de construction basés sur la nature en raison de son aspect naturel, de sa nature écologique et de ses effets biophiles chez l'homme. L'utilisation de ce matériau dans des endroits sensibles sur le plan de l'hygiène est toutefois remise en question en raison de sa nature organique et poreuse. Des études antérieures ont montré que le bois possède des propriétés antimicrobiennes contre de nombreux microorganismes importants du point de vue de l'hygiène. Les travaux sont encore nécessaires pour démontrer cette action antimicrobienne et sa re

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Zhang, Tian. "Investigation of The Structure-Property Correlations of Pendent Functionalized Antimicrobial Polyurethanes." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1522936710295726.

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Korkmaz, Erdural Beril. "Photocatalytic Antimicrobial And Self-cleaning Properties Of Titania-silica Mixed Oxide Thin Films." Phd thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615137/index.pdf.

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In this study photocatalytic antibacterial and self-cleaning activities of TiO2-SiO2 thin films as a function of TiO2/SiO2 ratios were investigated. TiO2-SiO2 mixed oxides were synthesized by sol-gel method and coated over soda-lime glass plates by dip coating technique. Escherichia coli was used as a model microorganism for the photocatalytic antibacterial tests. Degradation rate of methylene blue (MB) molecules was used to characterize photocatalytic self-cleaning activities of thin film surfaces. The maximum antibacterial activity was achieved over 92 wt% SiO2 containing thin films. Howe

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Deyrieux, Charlotte. "Identification, characterisation and application of plant extracts with combined antioxidant and antimicrobial properties." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTG070.

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L’oxydation et le développement microbien constituent les paramètres majeurs à l’origine de l’altération des produits alimentaires, notamment des aliments pour animaux. Ces dégradations affectent les qualités nutritionnelles et sensorielles des produits et peuvent avoir des répercussions au niveau sanitaire. Dans ce contexte, différents moyens de prévention sont disponibles pour limiter ces phénomènes. Parmi eux, la valorisation d’ingrédients d’origine végétale à des fins alimentaires représente un enjeu majeur pour la recherche et l’industrie. Leur utilisation en tant que conservateurs nature

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Oree, Glynis. "Chitin hydrolysis with chitinolytic enzymes for the production of chitooligomers with antimicrobial properties." Thesis, Rhodes University, 2019. http://hdl.handle.net/10962/67887.

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There are many diseases and illnesses in the world that require new drug treatments and chitin has been shown to produce chitooligomeric derivatives which exhibit promising antimicrobial and immune-enhancing properties. However, the rate-limiting step is associated with the high recalcitrance of chitinous substrates, and low hydrolytic activities of chitinolytic enzymes, resulting in low product release. To improve and create a more sustainable and economical process, enhancing chitin hydrolysis through various treatment procedures is essential for obtaining high enzyme hydrolysis rates, resul

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Van, der Vyver Petrus Jacobus. "Antimicrobial properties and smear layer management of nine different root canal irrigation solutions." Diss., Pretoria : [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-082222008-163721/.

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Al-Dulaimi, Omar Ahmed Abass. "Phytochemical composition and antimicrobial properties of four plants indicated for traditional medicine use." Thesis, Keele University, 2017. http://eprints.keele.ac.uk/3078/.

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The rapid development of seriously drug-resistant pathogen strains has created a dangerous problem to public health. The discovery of new effective antimicrobials remains an urgent task to control microbial resistance. Natural products can offer special stereochemistry and unlimited diversity of natural leads which are biologically active or ready for development and structure optimization strategies. Four medicinal plants Cylicodiscus gabunensis (CG), Pogostemon cablin (PC), Perilla frutescens (PF) and Magnolia biondii (MB) were selected for investigation of their phytochemical composition an

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CALAMELLO, CATERINA. "TRP ACTIVE COMPOUNDS FROM FOOD PLANTS AND THEIR PROPERTIES AS ANTIMICROBIAL AND BIOCIDES." Doctoral thesis, Università degli Studi di Milano, 2012. http://hdl.handle.net/2434/168879.

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Nowadays plant derived compounds constitute a promising resource in ecofriendly pest and diseases management because they are ‘generally recognized as safe’ (GRAS). Plants have evolved ingenious defense mechanisms by production of pungent and irritant compounds. These substances produce their psychophysical effects by targeting the TRPA1 receptor, belonging to transient receptor potential (TRP) channels. Two secondary metabolites contained in the Asian food plant Perilla frutescens, perillaldehyde (PA) and perillaketone (PK), are potent agonists of TRPA1. The aim of the present PhD project was

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