SURFACE AND INTERFACE SCIENCE, VOLUME 9

Download SURFACE AND INTERFACE SCIENCE, VOLUME 9 PDF Online Free

Author :
Publisher :
ISBN 13 : 9783527413829
Total Pages : pages
Book Rating : 4.4/5 (138 download)

DOWNLOAD NOW!


Book Synopsis SURFACE AND INTERFACE SCIENCE, VOLUME 9 by :

Download or read book SURFACE AND INTERFACE SCIENCE, VOLUME 9 written by and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Surface Complexation Modelling

Download Surface Complexation Modelling PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 0080467784
Total Pages : 653 pages
Book Rating : 4.0/5 (84 download)

DOWNLOAD NOW!


Book Synopsis Surface Complexation Modelling by : Johannes Lutzenkirchen

Download or read book Surface Complexation Modelling written by Johannes Lutzenkirchen and published by Elsevier. This book was released on 2006-09-02 with total page 653 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface Complexation Modelling deals with various aspects associate to the modelling of solutes adsorption from of solutes from aqueous solutions to minerals. The individual contributions cover fundamental aspects and applications. Applications cover case studies and present consistent surface complexation parameter sets. The model approaches range from simplistic to mechanistic. More fundamental contributions address underlying phenomena or stress the opportunities of modern computational methods. Several mineral systems are covered, including goethite, gibbsite, clay minerals etc.Surface Complexation Modelling presents the state-of-the-art of surface complexation modelling and suggests ideas for further model development. A number of chapters are authored by scientists working on nuclear waste storage, where the retention of radionuclides contributes to preventing radionuclide migration from the repository to the biosphere. Other contributions come from soil and environmental chemists with an interest in reactive transport of pollutants in soils or aquifers. Covering a wide range of disciplines Bringing together contributions from experts in the field Providing a balance between the theoretical and applied aspects

Surface and Interface Chemistry of Clay Minerals

Download Surface and Interface Chemistry of Clay Minerals PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 0081024339
Total Pages : 426 pages
Book Rating : 4.0/5 (81 download)

DOWNLOAD NOW!


Book Synopsis Surface and Interface Chemistry of Clay Minerals by : Robert Schoonheydt

Download or read book Surface and Interface Chemistry of Clay Minerals written by Robert Schoonheydt and published by Elsevier. This book was released on 2018-11-05 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface and Interface Chemistry of Clay Minerals, Volume 9, delivers a fundamental understanding of the surface and interface chemistry of clay minerals, thus serving as a valuable resource for researchers active in the fields of materials chemistry and sustainable chemistry. Clay minerals, with surfaces ranging from hydrophilic, to hydrophobic, are widely studied and used as adsorbents. Adsorption can occur at the edges and surfaces of clay mineral layers and particles, and in the interlayer region. This diversity in properties and the possibility to tune the surface properties of clay minerals to match the properties of adsorbed molecules is the basis for study. This book requires a fundamental understanding of the surface and interface chemistry of clay minerals, and of the interaction between adsorbate and adsorbent. It is an essential resource for clay scientists, geologists, chemists, physicists, material scientists, researchers, and students. Presents scientists and engineers with a resource they can rely on for their own research and work involving clay minerals Includes an in-depth look at ion exchange, adsorption of inorganic and organic molecules, including polymers and proteins, and catalysis occurring at the surfaces of clay minerals Includes materials chemistry of clay minerals with chiral clay minerals, optical materials and functional films

Surface and Interface Science, Volumes 9 and 10

Download Surface and Interface Science, Volumes 9 and 10 PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 3527413812
Total Pages : 990 pages
Book Rating : 4.5/5 (274 download)

DOWNLOAD NOW!


Book Synopsis Surface and Interface Science, Volumes 9 and 10 by : Klaus Wandelt

Download or read book Surface and Interface Science, Volumes 9 and 10 written by Klaus Wandelt and published by John Wiley & Sons. This book was released on 2020-03-30 with total page 990 pages. Available in PDF, EPUB and Kindle. Book excerpt: In ten volumes, this unique handbook covers all fundamental aspects of surface and interface science and offers a comprehensive overview of this research area for scientists working in the field, as well as an introduction for newcomers. Volume 1: Concepts and Methods Volume 2: Properties of Elemental Surfaces Volume 3: Properties of Composite Surfaces: Alloys, Compounds, Semiconductors Volume 4: Solid-Solid Interfaces and Thin Films Volume 5: Solid-Gas Interfaces I Volume 6: Solid-Gas Interfaces II Volume 7: Liquid and Biological Interfaces Volume 8: Interfacial Electrochemistry Volume 9: Applications of Surface Science I Volume 10: Applications of Surface Science II Content of Volumes 8 & 9: * Surface Analytics with X-Ray Photoelectron and Auger Electron Spectroscopy on Coated Steel Sheets * Applications of Graphene * Industrial Heterogeneous Catalysis * Automotive Catalysis * High-Throughput Heterogeneous Catalyst Research, Development, Scale-Up, and Production Support * Industrial Separation of Insulating Particles: Triboelectric Charging * Friction: Friend and Foe * Surface Science and Flotation * Application of Surface Science to Corrosion * Electrons, Electrodes, and the Transformation of Organic Molecules * Self-Cleaning Surfaces: From Fundamental Aspect to Real Technical Applications * Thin Films: Sputtering, PVD Methods and Applications * Wafer Bonding * Superconformal Deposition * Spintronics: Surface and Interface Aspects * Device Efficiency of Organic Light-Emitting Diodes * Dye-Sensitized Solar Cells * Electronic Nose: Current Status and Future Trends * Surface Science in Batteries * Surface and Interface Science in Fuel Cells Research

Surface Activity in Drug Action

Download Surface Activity in Drug Action PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 9780080456119
Total Pages : 340 pages
Book Rating : 4.4/5 (561 download)

DOWNLOAD NOW!


Book Synopsis Surface Activity in Drug Action by :

Download or read book Surface Activity in Drug Action written by and published by Elsevier. This book was released on 2005-03-01 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface activity is present in living systems; for example in body fluid or cell soup and molecules of surface-active nature are crucial to living matter and its organization. Surface Activity in Drug Action proposes "a liquid membrane hypothesis of drug action" for surface-active drugs. Chapters 1-7 contains an account of the hypothesis and chapter 8 contains a general account of the application of surface activity in therapeutics. The methodology and presentation of the information makes Surface Activity in Drug Action valuable reading for students and researchers interested in surface activity. * Is clearly written * Includes contributions from prominent names in the field, such as Bhise and Subrahmanyam * Contains a general account of the application of surface activity in therapeutics

Advanced Chemistry of Monolayers at Interfaces

Download Advanced Chemistry of Monolayers at Interfaces PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 9780080475059
Total Pages : 378 pages
Book Rating : 4.4/5 (75 download)

DOWNLOAD NOW!


Book Synopsis Advanced Chemistry of Monolayers at Interfaces by : Toyoko Imae

Download or read book Advanced Chemistry of Monolayers at Interfaces written by Toyoko Imae and published by Elsevier. This book was released on 2007-04-20 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Chemistry of Monolayers at Interfaces describes the advanced chemistry of monolayers at interfaces. Focusing on the recent trends of methodology and technology, which are indispensable in monolayer science. They are applied to monolayers of surfactants, amphiphiles, polymers, dendrimers, enzymes, and proteins, which serve many uses. Introduces the methodologies of scanning probe microscopy, surface force instrumentation, surface spectroscopy, surface plasmon optics, reflectometry, and near-field scanning optical microscopy. Modern interface reaction method, lithographic technology and different types of monolayers like adsorption, Langmuir and Langmuir-Blodgett monolayers at air/liquid, liquid/liquid, liquid/solid and air/solid interfaces, are all covered. Introducing novel methodologies and technologies Covering the different types of monolayers Discusses all currently available instrumental techniques for studying all types of monolayer

Surface and Interface Science, Volumes 7 and 8

Download Surface and Interface Science, Volumes 7 and 8 PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 3527411593
Total Pages : 1002 pages
Book Rating : 4.5/5 (274 download)

DOWNLOAD NOW!


Book Synopsis Surface and Interface Science, Volumes 7 and 8 by : Klaus Wandelt

Download or read book Surface and Interface Science, Volumes 7 and 8 written by Klaus Wandelt and published by John Wiley & Sons. This book was released on 2020-03-30 with total page 1002 pages. Available in PDF, EPUB and Kindle. Book excerpt: In ten volumes, this unique handbook covers all fundamental aspects of surface and interface science and offers a comprehensive overview of this research area for scientists working in the field, as well as an introduction for newcomers. Volume 1: Concepts and Methods Volume 2: Properties of Elemental Surfaces Volume 3: Properties of Composite Surfaces: Alloys, Compounds, Semiconductors Volume 4: Solid-Solid Interfaces and Thin Films Volume 5: Solid-Gas Interfaces I Volume 6: Solid-Gas Interfaces II Volume 7: Liquid and Biological Interfaces Volume 8: Interfacial Electrochemistry Volume 9: Applications of Surface Science I Volume 10: Applications of Surface Science II Content of Volumes 7 & 8: * Probing Liquid/Solid Interfaces at the Molecular Level * Structure and Dynamics of Liquid-Solid Interfaces * Adsorption of Biomolecules * Liquid Surfaces * Surfaces of Ionic Liquids * Superhydrophobicity * Cell Penetrating Peptides Targeting and Distorting Biological Membranes * Theory of Solid/Electrolyte Interfaces * Metal/Electrolyte Interfaces: An Atomic View * X-Ray Spectroscopy at Electro-Catalytic Interfaces * Fundamental Aspects of Electro-Catalysis * Non-Linear Processes at Solid/Liquid Interfaces

Surface and Interface Science, Volumes 1 and 2

Download Surface and Interface Science, Volumes 1 and 2 PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 3527411569
Total Pages : 1010 pages
Book Rating : 4.5/5 (274 download)

DOWNLOAD NOW!


Book Synopsis Surface and Interface Science, Volumes 1 and 2 by : Klaus Wandelt

Download or read book Surface and Interface Science, Volumes 1 and 2 written by Klaus Wandelt and published by John Wiley & Sons. This book was released on 2012-04-16 with total page 1010 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering interface science from a novel surface science perspective, this unique handbook offers a comprehensive overview of this burgeoning field. Eight topical volumes cover basic concepts and methods, elemental and composite surfaces, solid-gas, solid-liquid and inorganic biological interfaces, as well as applications of surface science in nanotechnology, materials science and molecular electronics. With its broad scope and clear structure, it is ideal as a reference for scientists in the field, as well as an introduction for newcomers.

Surface and Interface Science, Volume 7

Download Surface and Interface Science, Volume 7 PDF Online Free

Author :
Publisher : Wiley-VCH
ISBN 13 : 9783527680597
Total Pages : 500 pages
Book Rating : 4.6/5 (85 download)

DOWNLOAD NOW!


Book Synopsis Surface and Interface Science, Volume 7 by : Klaus Wandelt

Download or read book Surface and Interface Science, Volume 7 written by Klaus Wandelt and published by Wiley-VCH. This book was released on 2020-01-10 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering interface science from a novel surface science perspective, this seven-volume handbook offers a comprehensive overview of both these and numerous other topics. The initial chapters treat basic fundamentals on such topics as vacuum technology, while general chapters -- where appropriate -- describe theoretical methods and provide models to help explain the respective phenomena, such as band structure calculations, chemisorption and segregation. Additionally, short references to more specialized methodology accompany the descriptions of the most important techniques. Ideal as a reference for scientists in the field, as well as an introduction to current methods for newcomers.

Surface and Interface Science, Volume 8

Download Surface and Interface Science, Volume 8 PDF Online Free

Author :
Publisher : Wiley-VCH
ISBN 13 : 9783527680603
Total Pages : 500 pages
Book Rating : 4.6/5 (86 download)

DOWNLOAD NOW!


Book Synopsis Surface and Interface Science, Volume 8 by : Klaus Wandelt

Download or read book Surface and Interface Science, Volume 8 written by Klaus Wandelt and published by Wiley-VCH. This book was released on 2020-01-10 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering interface science from a novel surface science perspective, this seven-volume handbook offers a comprehensive overview of both these and numerous other topics. The initial chapters treat basic fundamentals on such topics as vacuum technology, while general chapters -- where appropriate -- describe theoretical methods and provide models to help explain the respective phenomena, such as band structure calculations, chemisorption and segregation. Additionally, short references to more specialized methodology accompany the descriptions of the most important techniques. Ideal as a reference for scientists in the field, as well as an introduction to current methods for newcomers.

Surface Complexation Modeling

Download Surface Complexation Modeling PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 1118063104
Total Pages : 268 pages
Book Rating : 4.1/5 (18 download)

DOWNLOAD NOW!


Book Synopsis Surface Complexation Modeling by : Athanasios K. Karamalidis

Download or read book Surface Complexation Modeling written by Athanasios K. Karamalidis and published by John Wiley & Sons. This book was released on 2011-02-14 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a description of the generalized two layer surface complexation model, data treatment procedures, and thermodynamic constants for sorption of metal cations and anions on gibbsite, the most common form of aluminum oxide found in nature and one of the most abundant minerals in soils, sediments, and natural waters. The book provides a synopsis of aluminum oxide forms and a clearly defined nomenclature. Compilations of available data for sorption of metal cations and anions on gibbsite are presented, and the results of surface complexation model fitting of these data are given. The consistency of the thermodynamic surface complexation constants extracted from the data is examined through development of linear free energy relationships which are also used to predict thermodynamic constants for ions for which insufficient data are available to extract constants. The book concludes with a comparison of constants extracted from data for sorption on gibbsite with those determined previously for hydrous ferric oxide (HFO), hydrous manganese oxide (HMO), and goethite. The overall objective of this book is the development and presentation of an internally consistent thermodynamic database for sorption of inorganic cations and anions on gibbsite, an abundant and reactive mineral in soils, sediments, and aquatic systems. Its surface has a high affinity for sorption of metal cations and anions, including radionuclides. The gibbsite database will enable simulation and prediction of the influence of sorption on the fate of these chemical species in natural systems and treatment processes in which aluminum oxides are abundant. It thus will help to advance the practical application of surface complexation modeling.

Electrokinetics in Microfluidics

Download Electrokinetics in Microfluidics PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 0080530745
Total Pages : 653 pages
Book Rating : 4.0/5 (85 download)

DOWNLOAD NOW!


Book Synopsis Electrokinetics in Microfluidics by : Dongqing Li

Download or read book Electrokinetics in Microfluidics written by Dongqing Li and published by Elsevier. This book was released on 2004-08-20 with total page 653 pages. Available in PDF, EPUB and Kindle. Book excerpt: A lab-on-a-chip device is a microscale laboratory on a credit-card sized glass or plastic chip with a network of microchannels, electrodes, sensors and electronic circuits. These labs on a chip can duplicate the specialized functions as performed by their room-sized counterparts, such as clinical diagnoses, PCR and electrophoretic separation. The advantages of these labs on a chip include significant reduction in the amounts of samples and reagents, very short reaction and analysis time, high throughput and portability. Generally, a lab-on-a-chip device must perform a number of microfluidic functions: pumping, mixing, thermal cycling/incubating, dispensing, and separating. Precise manipulation of these microfluidic processes is key to the operation and performance of labs on a chip. The objective of this book is to provide a fundamental understanding of the interfacial electrokinetic phenomena in several key microfluidic processes, and to show how these phenomena can be utilised to control the microfluidic processes. For this purpose, this book emphasises the theoretical modelling and the numerical simulation of these electrokinetic phenomena in microfluidics. However, experimental studies of the electrokinetic microfluidic processes are also highlighted in sufficient detail. The first book which systematically reviews electrokinetic microfluidics processes for lab-on-a chip applications Covers modelling and numerical simulation of the electrokinetic microfluidics processes Providing information on experimental studies and details of experimental techniques, which are essential for those who are new to this field

The Properties of Water and Their Role in Colloidal and Biological Systems

Download The Properties of Water and Their Role in Colloidal and Biological Systems PDF Online Free

Author :
Publisher : Academic Press
ISBN 13 : 0123743036
Total Pages : 239 pages
Book Rating : 4.1/5 (237 download)

DOWNLOAD NOW!


Book Synopsis The Properties of Water and Their Role in Colloidal and Biological Systems by : Carel J. Van Oss

Download or read book The Properties of Water and Their Role in Colloidal and Biological Systems written by Carel J. Van Oss and published by Academic Press. This book was released on 2008-11-19 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book also treats the surface properties of apolar and polar molecules, polymers, particles and cells, as well as their mutual interaction energies, when immersed in water, under the influence of the three prevailing non-covalent forces, i.e., Lewis acid-base (AB), Lifshitz-van der Waals (LW) and electrical double layer (EL) interactions. The polar AB interactions, be they attractive or repulsive, typically represent up to 90% of the total interaction energies occurring in water. Thus the addition of AB energies to the LW + EL energies of the classical DLVO theory of energy vs. distance analysis makes this powerful tool (the Extended DLVO theory) applicable to the quantitative study of the stability of particle suspensions in water.-

Novel Methods to Study Interfacial Layers

Download Novel Methods to Study Interfacial Layers PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 0080537774
Total Pages : 533 pages
Book Rating : 4.0/5 (85 download)

DOWNLOAD NOW!


Book Synopsis Novel Methods to Study Interfacial Layers by : D. Moebius

Download or read book Novel Methods to Study Interfacial Layers written by D. Moebius and published by Elsevier. This book was released on 2001-10-30 with total page 533 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a number of selected papers given at the LB9 conference, held in Potsdam, Germany, in August 2000. It is dedicated to new techniques and methodologies for studying interfacial layers. One group of manuscripts deals with the application of surface plasmons at solid interfaces, used for example in resonance spectroscopy and light scattering. New applications of various types of Atomic Force Microscopy are reported making use of various modifications of tips. A number of chapters are dedicated to light emitting diodes built with the help of LB layers. The aim of these studies is the improvement of efficiency. Electrochemical methods were described as tools for developing sensors, in particular miniaturised pH or gas sensors.The application of synchrotron X-ray and NMR techniques have been described in detail in two extended chapters. It is demonstrated how molecular information can be detected by these methods for various types of interfacial layers.This monograph, along with 130 papers that have been submitted for publication in the special issues of relevant journals, represent the proceedings of the LBP conference.

Surface and Interface Science, Volumes 5 and 6

Download Surface and Interface Science, Volumes 5 and 6 PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 3527411585
Total Pages : 1532 pages
Book Rating : 4.5/5 (274 download)

DOWNLOAD NOW!


Book Synopsis Surface and Interface Science, Volumes 5 and 6 by : Klaus Wandelt

Download or read book Surface and Interface Science, Volumes 5 and 6 written by Klaus Wandelt and published by John Wiley & Sons. This book was released on 2016-03-14 with total page 1532 pages. Available in PDF, EPUB and Kindle. Book excerpt: In eight volumes, Surface and Interface Science covers all fundamental aspects and offers a comprehensive overview of this research area for scientists working in the field, as well as an introduction for newcomers. Volume 5: Solid-Gas Interfaces I Topics covered: Basics of Adsorption and Desorption Surface Microcalorimetry Adsorption of Rare Gases Adsorption of Alkali and Other Electro-Positive Metals Halogen adsorption on metals Adsorption of Hydrogen Adsorption of Water Adsorption of (Small) Molecules on Metal Surfaces Surface Science Approach to Catalysis Adsorption, Bonding and Reactivity of Unsaturated and Multifunctional Molecules Volume 6: Solid-Gas Interfaces II Topics covered: Adsorption of Large Organic Molecules Chirality of Adsorbates Adsorption on Semiconductor Surfaces Adsorption on Oxide Surfaces Oscillatory Surface Reactions Statistical Surface Thermodynamics Theory of the Dynamics at Surfaces Atomic and Molecular Manipulation

Handbook of Clay Science

Download Handbook of Clay Science PDF Online Free

Author :
Publisher : Newnes
ISBN 13 : 0080993710
Total Pages : 1748 pages
Book Rating : 4.0/5 (89 download)

DOWNLOAD NOW!


Book Synopsis Handbook of Clay Science by :

Download or read book Handbook of Clay Science written by and published by Newnes. This book was released on 2013-07-23 with total page 1748 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first edition of the Handbook of Clay Science published in 2006 assembled the scattered literature on the varied and diverse aspects that make up the discipline of clay science. The topics covered range from the fundamental structures (including textures) and properties of clays and clay minerals, through their environmental, health and industrial applications, to their analysis and characterization by modern instrumental techniques. Also included are the clay-microbe interaction, layered double hydroxides, zeolites, cement hydrates, and genesis of clay minerals as well as the history and teaching of clay science. The 2e adds new information from the intervening 6 years and adds some important subjects to make this the most comprehensive and wide-ranging coverage of clay science in one source in the English language. Provides up-to-date, comprehensive information in a single source Covers applications of clays, as well as the instrumental analytical techniques Provides a truly multidisciplinary approach to clay science

Handbook of Surfaces and Interfaces of Materials, Five-Volume Set

Download Handbook of Surfaces and Interfaces of Materials, Five-Volume Set PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 0080533825
Total Pages : 1915 pages
Book Rating : 4.0/5 (85 download)

DOWNLOAD NOW!


Book Synopsis Handbook of Surfaces and Interfaces of Materials, Five-Volume Set by : Hari Singh Nalwa

Download or read book Handbook of Surfaces and Interfaces of Materials, Five-Volume Set written by Hari Singh Nalwa and published by Elsevier. This book was released on 2001-10-26 with total page 1915 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook brings together, under a single cover, all aspects of the chemistry, physics, and engineering of surfaces and interfaces of materials currently studied in academic and industrial research. It covers different experimental and theoretical aspects of surfaces and interfaces, their physical properties, and spectroscopic techniques that have been applied to a wide class of inorganic, organic, polymer, and biological materials. The diversified technological areas of surface science reflect the explosion of scientific information on surfaces and interfaces of materials and their spectroscopic characterization. The large volume of experimental data on chemistry, physics, and engineering aspects of materials surfaces and interfaces remains scattered in so many different periodicals, therefore this handbook compilation is needed.The information presented in this multivolume reference draws on two decades of pioneering research on the surfaces and interfaces of materials to offer a complete perspective on the topic. These five volumes-Surface and Interface Phenomena; Surface Characterization and Properties; Nanostructures, Micelles, and Colloids; Thin Films and Layers; Biointerfaces and Applications-provide multidisciplinary review chapters and summarize the current status of the field covering important scientific and technological developments made over past decades in surfaces and interfaces of materials and spectroscopic techniques with contributions from internationally recognized experts from all over the world. Fully cross-referenced, this book has clear, precise, and wide appeal as an essential reference source long due for the scientific community. The complete reference on the topic of surfaces and interfaces of materialsThe information presented in this multivolume reference draws on two decades of pioneering researchProvides multidisciplinary review chapters and summarizes the current status of the fieldCovers important scientific and technological developments made over past decades in surfaces and interfaces of materials and spectroscopic techniquesContributions from internationally recognized experts from all over the world