Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Download Lifetime And Dissolution Kinetics Of Zinc Oxide Nanoparticles In Aqueous Media full books in PDF, epub, and Kindle. Read online Lifetime And Dissolution Kinetics Of Zinc Oxide Nanoparticles In Aqueous Media ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Download or read book Lifetime and Dissolution Kinetics of Zinc Oxide Nanoparticles in Aqueous Media written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Chun Yat Leung
Publisher :
ISBN 13 :
Total Pages : 76 pages
Book Rating : 4.:/5 (112 download)
Download or read book Investigating Dissolution Kinetics and Cytotoxicity of Zinc Oxide Nanomaterials written by Chun Yat Leung and published by . This book was released on 2019 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sotirios Baskoutas
Publisher : MDPI
ISBN 13 : 3038973025
Total Pages : 303 pages
Book Rating : 4.0/5 (389 download)
Download or read book Zinc Oxide Nanostructures: Synthesis and Characterization written by Sotirios Baskoutas and published by MDPI. This book was released on 2018-12-04 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Zinc Oxide Nanostructures: Synthesis and Characterization" that was published in Materials
Author : Teofil Jesionowski
Publisher : MDPI
ISBN 13 : 3039213970
Total Pages : 204 pages
Book Rating : 4.0/5 (392 download)
Download or read book Multifunctional Oxide-Based Materials: From Synthesis to Application written by Teofil Jesionowski and published by MDPI. This book was released on 2019-09-03 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book deals with novel aspects and perspectives in metal oxide and hybrid material fabrication. The contributions are mainly focused on the search for a new group of advanced materials with designed physicochemical properties, especially an expanded porous structure and defined surface activity. The proposed technological procedures result in an enhanced activity of the synthesized hybrid materials, which is of great importance when considering their potential fields of application. The use of such materials in different technological disciplines, including aspects associated with environmental protection, allows for the verification of the proposed synthesis method. Thus, it can be stated that those aspects are of interdisciplinary character and may be located at the interface of three scientific disciplines—chemistry, materials science, and engineering—as well as environmental protection. Furthermore, the presented scientific scope is in some way an answer to the continuous demand for such types of materials and opens new perspectives for their practical use
Author : Sara Cruz González
Publisher :
ISBN 13 :
Total Pages : 169 pages
Book Rating : 4.:/5 (112 download)
Download or read book Availability of Metal Ions and ZnO Nanoparticles in Aqueous Media written by Sara Cruz González and published by . This book was released on 2014 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: La presència de determinats metalls, ja sigui en forma del metall lliure, formant complexos amb lligands o en forma de nanopartícules metàl·liques té efectes negatius en el medi ambient. Per aquest motiu, l'estudi de la disponibilitat de metalls és important per determinar el seu impacte mediambiental. En aquest treball s'ha estudiat un sistema i una tècnica per a la mesura de la disponibilitat. El sistema té la particularitat de contenir, en dispersió, nanopartícules d'òxids metàl·lics. Una primera part de l'estudi s'enfoca a la caracterització físic-química de dispersions sintètiques de nanopartícules. Aquesta part estudia l'efecte que tenen les condicions del medi (pH, salinitat, contingut de matèria orgànica, etc.) en el comportament de les nanopartícules. S'han determinat processos com són l'agregació, solubilització i sedimentació, en funció de les condicions del medi. Tots aquests processos juguen un paper molt important en el destí de les nanopartícules en el medi ambient i en la seva toxicitat. La segona part d'aquesta tesi es centra en l'aplicació de la tècnica analítica DGT (Diffusive Gradient in Thin films) per la mesura de fluxos de metall disponibles en solucions aquoses. En el present treball, s'ha determinat la solubilitat de nanopartícules en dispersions aquoses. Per altra banda s'ha estudiat la tècnica DGT des d'un punt de vista físic-químic. Les contribucions dels fluxos de complexos s'avaluen amb un paràmetre que té en compte les constants de dissociació dels complexos així com la seva difusió. S'han estudiat les acumulacions de metalls que en solució tenen com especies dominants complexos carregats elèctricament. Si aquesta càrrega és negativa, l'acumulació disminueix en baixar la força iònica i a l'inrevés en el cas contrari. Aquest fenomen s'explica per la repulsió electrostàtica entre la càrrega negativa del disc de resina i el complex quan aquest és parcialment làbil. En conclusió, la resina sembla jugar un paper més actiu del que es pensava en l'acumulació de metalls en DGT.
Author : Kamlendra Awasthi
Publisher : Elsevier
ISBN 13 : 0128189010
Total Pages : 781 pages
Book Rating : 4.1/5 (281 download)
Download or read book Nanostructured Zinc Oxide written by Kamlendra Awasthi and published by Elsevier. This book was released on 2021-08-10 with total page 781 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructured Zinc Oxide covers the various routes for the synthesis of different types of nanostructured zinc oxide including; 1D (nanorods, nanowires etc.), 2D and 3D (nanosheets, nanoparticles, nanospheres etc.). This comprehensive overview provides readers with a clear understanding of the various parameters controlling morphologies. The book also reviews key properties of ZnO including optical, electronic, thermal, piezoelectric and surface properties and techniques in order to tailor key properties. There is a large emphasis in the book on ZnO nanostructures and their role in optoelectronics. ZnO is very interesting and widely investigated material for a number of applications. This book presents up-to-date information about the ZnO nanostructures-based applications such as gas sensing, pH sensing, photocatalysis, antibacterial activity, drug delivery, and electrodes for optoelectronics. - Reviews methods to synthesize, tailor, and characterize 1D, 2D, and 3D zinc oxide nanostructured materials - Discusses key properties of zinc oxide nanostructured materials including optical, electronic, thermal, piezoelectric, and surface properties - Addresses most relevant zinc oxide applications in optoelectronics such as light-emitting diodes, solar cells, and sensors
Author : Eleonora Spisni
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (12 download)
Download or read book Toxicity Assessment of Industrial- and Sunscreen-derived ZnO Nanoparticles written by Eleonora Spisni and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the present case study is investigating the toxic effects derived from nanosized zinc oxide nanoparticles toward the marine life. In particular, the present study evaluates for the first time the growth inhibition induced by both industrial-derived and sunscreen self-extracted zinc oxide nanoparticles on the diatom Thalassiosira pseudonana. The experiments, performed at the Environmental Engineering Laboratory of the University of Miami, showed that the toxic effects induced by nano-ZnO were influenced by the type of nanoparticle, as well as their concentration in aqueous media and the exposure time. Specifically, smaller, industrial-derived nano-ZnO induced a greater growth inhibition compared to sunscreen-derived ones, especially at lower nanoparticle concentration in the aqueous media. This behavior might indicate that at higher nanoparticle concentration the toxicity is controlled by nanoparticle aggregation (regardless of nanoparticle size), whereas at lower nanoparticle concentration the toxicity is influenced by the nanoparticle size, as well as nanoparticle type and exposure time. The aim of the present case study is investigating the toxic effects derived from nanosized zinc oxide nanoparticles toward the marine life. In particular, the present study evaluates for the first time the growth inhibition induced by both industrial-derived and sunscreen self-extracted zinc oxide nanoparticles on the diatom Thalassiosira pseudonana. The experiments, performed at the Environmental Engineering Laboratory of the University of Miami, showed that the toxic effects induced by nano-ZnO were influenced by the type of nanoparticle, as well as their concentration in aqueous media and the exposure time. Specifically, smaller, industrial-derived nano-ZnO induced a greater growth inhibition compared to sunscreen-derived ones, especially at lower nanoparticle concentration in the aqueous media. This behavior might indicate that at higher nanoparticle concentration the toxicity is controlled by nanoparticle aggregation (regardless of nanoparticle size), whereas at lower nanoparticle concentration the toxicity is influenced by the nanoparticle size, as well as nanoparticle type and exposure time.
Author : Man-Na Mana Yung
Publisher :
ISBN 13 : 9781361034910
Total Pages : pages
Book Rating : 4.0/5 (349 download)
Download or read book Influences of Temperature and Salinity on the Physicochemical Properties and Toxicities of Zinc Oxide Nanoparticles to Microalgae written by Man-Na Mana Yung and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Influences of Temperature and Salinity on the Physicochemical Properties and Toxicities of Zinc Oxide Nanoparticles to Microalgae" by Man-na, Mana, Yung, 戎曼娜, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: As effective blockers of ultraviolet radiation, zinc oxide nanoparticles (ZnO-NPs) are widely used in sunscreens and can be easily released into aquatic environments. When ZnO-NPs enter the marine environment, their properties and toxicity may be altered by temperature and salinity. However, combined effects of temperature and salinity on their toxicity to aquatic organisms remain unknown. Moreover, ZnO-NPs are often coated with a synthetic layer in commercial sunscreens to enhance its adhesion to human skin and waterproof ability. Yet, what kind of coating could result in a low toxicity remains largely unknown. This study, therefore, aimed to (1) investigate the effect of environmental factors such as salinity, temperature and pH on physicochemical properties and toxicity of ZnO-NPs to microalgae, and (2) compare the physicochemical properties and toxicities of different coated and uncoated ZnO-NPs. Increases in salinity, temperature and pH enhanced the aggregation and reduced dissolution of ZnO-NPs. An increase in water temperature from 10 to 30C reduced the zeta potential of ZnO-NPs, but an increase in salinity from 12 to 32 psu and an increase of pH from 7 to 8 did not affect their zeta potential. The increased aggregate size and decreased ion release with increasing salinity, and consequently lower concentration of bioavailable zinc ions, resulted in decreased toxicity of ZnO-NPs to the marine diatom Thalassiosira pseudonana at higher salinity based on growth inhibition and photosynthetic responses. Their toxicity to the diatoms decreased from 10 to 25C, and then increased at 30C due to the incurred thermal stress. There were interacting effects of salinity and temperature on the toxicity of ZnO-NPs to T. pseudonana; their toxicity to the diatoms generally decreased with increasing salinity from 12 to 32 psu across temperatures between 10-25C, but this trend did not hold at 30C. Temperature is a more dominant factor than salinity, as it has strong influences on the diatom's physiology and tolerance towards ZnO-NPs. Based on gene expression results, T. pseudonana exposed to ZnO-NPs at low salinity (12 psu) and extreme temperatures (10C and 30C), experienced diatom frustule damage, photosynthetic damage and oxidative stress earlier than the diatoms cultured at the high salinity (32 psu) and room temperature (25C). Changes in gene expression patterns by temperature and salinity were related to zinc ions released from ZnO-NPs, particle-cell interactions and physiological changes in the diatoms. ZnO-NPs covered with organosilane coating suppressed aggregation and dissolution of ZnO-NPs. Toxicities of uncoated and silane-coated ZnO-NPs to six different microalgae species were species-specific. ZnO-NPs coated with hydrophobic dodecyltrichlorosilane (D-ZnO-NPs) generally exhibited lower toxicity to the microalgae than the uncoated ZnO-NPs and ZnO-NPs coated with 3-aminopropyltrimethoxysilane (A-ZnO-NPs).D-ZnO-NPs and uncoated ZnO-NPs induced oxidative stress in T. pseudonana, while A-ZnO-NPs and uncoated ZnO-NPs impaired/disturbed their frustule formation, silicon transportation, and photosynthesis. This study provided empirical toxicity data and useful information for ecological risk assessment of ZnO-NPs under different environmental conditions. The results also indicate that ZnO-N
Author : R-A-Thilini Perera Rupasinghe
Publisher :
ISBN 13 :
Total Pages : 65 pages
Book Rating : 4.:/5 (77 download)
Download or read book Dissolution and Aggregation of Zinc Oxide Nanoparticles at Circumneutral PH written by R-A-Thilini Perera Rupasinghe and published by . This book was released on 2011 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: A reversal of surface charge of ZnO nanoparticles was observed upon adsorption of citrates. Adsorption of negatively charged Cit3- onto ZnO nanoparticles make the surfaces negatively charged and this result in a repulsion between nanoparticles eventually leading to a lesser extent of aggregation. Formation of a stable suspension was also observed in the presence of citric acid. These trends observed in aggregation pattern are of great environmental and biological importance as citric acid is abandon in the environment as well as in human body.
Author : Carmen Galvan
Publisher : Nova Science Publishers
ISBN 13 : 9781536177534
Total Pages : 0 pages
Book Rating : 4.1/5 (775 download)
Download or read book Zinc Oxide written by Carmen Galvan and published by Nova Science Publishers. This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book the authors first provide a summary of the natural sources available for the synthesis of zinc oxide nanoparticles, enlisting some plant-mediated synthesised zinc oxide nanoparticles showing promising antimicrobial, antioxidant, cytotoxic and photocatalytic properties. Important technological opportunities and challenges emphasizing the electrical and optoelectronic features of elongated zinc oxide nanoparticle nanosystems are reviewed. The various nonlinear optical phenomenon observed in zinc oxide thin film, including nonlinear absorption, nonlinear refraction, nonlinear scattering and harmonic generations are introduced. Selected literature on the use of zinc oxide nanoparticles for the immobilisation of enzymes is reviewed, as well as the use of zinc oxide nanoparticle/enzyme systems in the fabrication of biosensors. The authors explore transition metal doped zinc oxide nanoparticles for a wide range of catalytic organic reactions, further exploring their catalytic applications for organic transformations at mild reaction conditions. The basic concepts behind the development of nanostructured zinc oxide nanoparticles, including the solid state reaction, hydrothermal method, solvothermal method and co-precipitation method are discussed. Lastly, a facile, eco-friendly synthesis of zinc oxide nanoparticles using the peel extract of Musa paradisiaca L, Punica granatum L, and Citrus reticulata Blanco as bioreducing agent is reported.
Author : Richard G. Brereton
Publisher : John Wiley & Sons
ISBN 13 : 0470057777
Total Pages : 396 pages
Book Rating : 4.4/5 (7 download)
Download or read book Applied Chemometrics for Scientists written by Richard G. Brereton and published by John Wiley & Sons. This book was released on 2007-03-13 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book introduces most of the basic tools of chemometrics including experimental design, signal analysis, statistical methods for analytical chemistry and multivariate methods. It then discusses a number of important applications including food chemistry, biological pattern recognition, reaction monitoring, optimisation of processes, medical applications. The book arises from a series of short articles that have been developed over four years on Chemweb (www.chemweb.com).
Author : Hong Yong Sohn
Publisher : Springer Science & Business Media
ISBN 13 : 1468491172
Total Pages : 481 pages
Book Rating : 4.4/5 (684 download)
Download or read book Rate Processes of Extractive Metallurgy written by Hong Yong Sohn and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computer technology in the past fifteen years has essentially rev olutionized engineering education. Complex systems involving coupled mass transport and flow have yielded to numerical analysis even for relatively complex geometries. The application of such technology together with advances in applied physical chemistry have justified a general updating of the field of heterogeneous kinetics in extractive metallurgy. This book is an attempt to cover significant areas of extrac tive metallurgy from the viewpoint of heterogeneous kinetics. Kinetic studies serve to elucidate fundamental mechanisms of reac tions and to provide data for engineering applications, including improved ability to scale processes up from bench to pilot plant. The general theme of this book is the latter-the scale-up. The practicing engineer is faced with problems of changes of order of magnitude in reactor size. We hope that the fundamentals of heterogeneous kinetics will provide increasing ability for such scale-up efforts. Although ther modynamics is important in defining potential reaction paths and the end products, kinetic limitations involving molecular reactions, mass trans port, or heat flow normally influence ultimate rates of production. For this reason, rate processes in the general field of extractive metallurgy have been emphasized in this book.
Author :
Publisher : Academic Press
ISBN 13 : 0123914639
Total Pages : 649 pages
Book Rating : 4.1/5 (239 download)
Download or read book Nanoparticles in Translational Science and Medicine written by and published by Academic Press. This book was released on 2011-11-14 with total page 649 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume explores some of the most exciting recent advances in basic research on nanoparticles in translational science and medicine and how this knowledge is leading to advances in the various fields. - This series provides a forum for discussion of new discoveries, approaches, and ideas - Contributions from leading scholars and industry experts - Reference guide for researchers involved in molecular biology and related fields
Author : Takaomi Arai
Publisher : Springer Science & Business Media
ISBN 13 : 4431857095
Total Pages : 431 pages
Book Rating : 4.4/5 (318 download)
Download or read book Ecotoxicology of Antifouling Biocides written by Takaomi Arai and published by Springer Science & Business Media. This book was released on 2009-01-29 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organotin compounds, used as antifouling biocides since 1960, are chemical compounds that act as endocrine disrupters. It is not known how organotin compounds cause hormone disturbance, however, and many questions remain about their effect on aquatic organisms. Studies on organotin compounds have recently evolved, with many new findings reported. Following a worldwide ban on organotin compounds in 2008, alternative compounds will mainly be used, with the potential for coastal areas to become contaminated, causing, among other effects, cholinesterase inhibition in aquatic organisms. Use of alternative compounds must be controlled to avoid such errors. These and other findings are described and concisely summarized in this book, providing a useful reference in countries where alternative biocides are being considered. Included are studies on the effects on marine organisms, making this book an excellent aid to experts in environmental chemistry, to government organizations, and to students.
Author : IARC Working Group on the Evaluation of Carcinogenic Risks to Humans
Publisher : World Health Organization
ISBN 13 : 9283212819
Total Pages : 434 pages
Book Rating : 4.2/5 (832 download)
Download or read book Man-made Vitreous Fibres written by IARC Working Group on the Evaluation of Carcinogenic Risks to Humans and published by World Health Organization. This book was released on 2002 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This publication represents the views and expert opinions of an IARC working group on the evaluation of carcinogenic risks to humans, which met in Lyon, 9-16 October 2001."
Author : Rajendra Pawar
Publisher : William Andrew
ISBN 13 : 0323393136
Total Pages : 113 pages
Book Rating : 4.3/5 (233 download)
Download or read book Heterogeneous Nanocomposite-Photocatalysis for Water Purification written by Rajendra Pawar and published by William Andrew. This book was released on 2015-04-29 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Heterogeneous Nanocomposite-Photocatalysis for Water Purification, the authors introduce various heterogeneous photocatalysts based on novel nanostructures of metal oxide semiconductors and graphene used for water purification, including TiO2, Fe2O3, SnO2, WO3 and g-C3N4, and outlines their advantages and drawbacks. The nanocomposite-photocatalysts ZnO and CdS are compared with reduced graphene oxide (rGO), a rapidly growing materials system. The authors describe how the photocatalytic activity of known nanomaterials can be improved by modifying the structural and optical properties (i.e., phase composition). - Introductory portion of the book includes a brief survey of all different kinds of heterogeneous photocatalysts - Discusses the possible photocatalysis mechanism occurring during the degradation of different toxic pollutants - Provides the photoelectrochemical measurement for synthesized catalysts, supporting the effective transportation of photoelectrons resulting into better catalytic properties
Author : John A. Rogers
Publisher : John Wiley & Sons
ISBN 13 : 3527338314
Total Pages : 368 pages
Book Rating : 4.5/5 (273 download)
Download or read book Silicon Nanomembranes written by John A. Rogers and published by John Wiley & Sons. This book was released on 2016-08-08 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edited by the leaders in the fi eld, with chapters from highly renowned international researchers, this is the fi rst coherent overview of the latest in silicon nanomembrane research. As such, it focuses on the fundamental and applied aspects of silicon nanomembranes, ranging from synthesis and manipulation to manufacturing, device integration and system level applications, including uses in bio-integrated electronics, three-dimensional integrated photonics, solar cells, and transient electronics. The first part describes in detail the fundamental physics and materials science involved, as well as synthetic approaches and assembly and manufacturing strategies, while the second covers the wide range of device applications and system level demonstrators already achieved, with examples taken from electronics and photonics and from biomedicine and energy.
