Surface modification

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Nanoscale surface modifications to control capillary flow characteristics in PMMA microfluidic devices

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  • A resistance of magnesium alloys to surface degradation is paramount for their applications in automotive, aerospace, consumer electronics and general-purpose markets. An emphasis of this book is on oxidation, corrosion and surface modifications, designed to enhance the alloy surface stability. It covers a nature of oxides grown at elevated temperatures and oxidation characteristics of selected alloys along with elements of general and electrochemical corrosion.

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  • A complete and permanent hydrophilic modification of poly (ethyleneterephthalate) (PET) films is achieved by argon-plasma irradiation, subsequently grafting acrylic acid (AA) in vapor phase onto their surface. Both Ar plasma irradiation alone and post grafting AA rendered a complete hydrophilicity to PET surfaces. However, the hydrophilicity of the PET surface, only treated with the Ar plasma, is not permanent. In contrast, PET films, irradiated by the Ar plasma, exposed to air, and subsequently grafted with AA monomer, are permanently hydrophilic.

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  • The regulation of protein expression on the cell surface membrane is an important component of the cellular response to extracellular signalling. The translation of extracellular signalling into specific protein localization often involves the post-translational modification of cargo proteins.

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  • The envelope protein gp64 of the baculovirusAutographa californicanuclear polyhedrosis virus is essential for viral entry into insect cells, as the glycoprotein bothmediates pH-dependentmembrane fusionandbinds tohost cell receptors. Surface modification of baculovirus particles by genetic engineering of gp64 has been demonstrated by various strategies and thus has become an important and powerful tool in molecular biology.

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  • Magnesium is the lightest of all the metals and the sixth most abundant on Earth. Magnesium is ductile and the most machinable of all the metals. Magnesium alloy developments have traditionally been driven by requirements for lightweight materials to operate under increasingly demanding conditions (magnesium alloy castings, wrought products, powder metallurgy components, office equipment, nuclear applications, flares, sacrificial anodes for the protection of other metals, flash photography and tools). The biggest potential market for magnesium alloys is in the automotive industry. ...

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  • The new millennium has seen the birth of a new perspective that conflates research in solid-state physics, biological science as well as materials engineering. The perspective is one that recognizes that future new advances in all these areas will be based on a fundamental understanding of the atomic and molecular infrastructure of materials that has resulted from two centuries of chemistry. Major advances will be achieved when the novel behavior, in particular the quantum mechanical behavior, that nanoscale structures possess, can be controlled and harnessed....

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  • Li et al. Nanoscale Research Letters 2011, 6:373 http://www.nanoscalereslett.com/content/6/1/373 NANO EXPRESS Open Access Preparation and properties of copper-oil-based nanofluids Dan Li1*, Wenjie Xie2 and Wenjun Fang3* Abstract In this study, the lipophilic Cu nanoparticles were synthesized by surface modification method to improve their dispersion stability in hydrophobic organic media. The oil-based nanofluids were prepared with the lipophilic Cu nanoparticles. The transport properties, viscosity, and thermal conductivity of the nanofluids have been measured.

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  • Modification of the surface of these vectors is a key element for their successful research and clinical use. Chapter three discusses the methods to modify surfaces of retroviral vectors, and the applications for surface modification of retroviral vectors, such as targeting and immune modulation. Chapter four reviews the role of the nuclear glucocorticoid receptor in controlling retroviral infection and function, and highlights its potential importance in retroviral-based gene therapy applications....

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  • In the last two decades, many books have been published on ion implantation and ion-beam processing. Why this one now? After all, the advantages of using an energetic ion beam to modify surfaces with a view to enhancing their tribological, electrochemical, optical and magnetic properties have been known for some time. The aim of this volume is to review the basics of previous work on ion-beam modification of materials and to include enough new material on novel applications to bring newcomers “up to speed” in this exciting area....

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  • In addition to the major carbohydrate moieties of the glycosylphosphatidylinositol (GPI) anchor, we report that Plasmodiumfalciparummerozoite surface protein1 (MSP-1) bearsO-GlcNAc modifications predominantly in b-ano-meric configuration, in both the C- andN-terminal portions of the protein. Subcellular fractionation of parasitized erythrocytes in the late trophozoite/schizont stage reveals that GPI-anchored C-terminal fragments of MSP-1 are recovered in Triton X-100 resistant, low-density membrane fractions....

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  • Although major trends may emerge and show numerous toxic effects related to certain NP, it can be seen that each product, and even each synthesized NP batch, can have its own toxicity. Any process or surface modification can have an impact on the toxicity of the resulting product. Given this context, the authors of this report consider that the IRSST should favour the introduction of strict prevention procedures, which remain the only way to prevent the development of occupational diseases.

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  • With a reduction of their size, nanoparticles reveal unique properties. A size reduction results in a substantial increase in the specific surface and the surface Gibbs free energy. This physical parameter of free energy reflects the fact that chemical reactivity increases rapidly as particle size diminishes. For example, water has a specific surface of 12.57x10-3 m2 /g at a diameter of one millimetre but the surface expands to 12.57x10+3 m2 /g at a diameter of one nanometre.

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  • CHAPTER 13 STRENGTH UNDER DYNAMIC CONDITIONS Charles R. Mischke, Ph.D., RE. Professor Emeritus of Mechanical Engineering Iowa State University Ames, Iowa 13.1 TESTING METHODS AND PRESENTATION OF RESULTS / 13.3 13.2 SN DIAGRAM FOR SINUSOIDAL AND RANDOM LOADING / 13.7 13.3 FATIGUE-STRENGTH MODIFICATION FACTORS / 13.9 13.4 FLUCTUATING STRESS / 13.24 13.5 COMPLICATED STRESS-VARIATION PATTERNS / 13.29 13.6 STRENGTH AT CRITICAL LOCATIONS / 13.31 13.7 COMBINED LOADING / 13.36 13.8 SURFACE FATIGUE / 13.41 REFERENCES / 13.44 RECOMMENDED READING / 13.

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  • In this paper, we first give an overview of the characterization techniques commonly used to follow surface and structural modification of CNTs upon chemical treatments; the respective sensitivity and the limits of each technique are also briefly discussed.

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  • This chapter starts with an overview of the characterization techniques commonly used to follow surface and structural modification of CNTs upon chemical treatments; the respective sensitivity and the limits of each technique are also briefly discussed.

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  • In response to the enactment by the U.S. Congress of the Intermodal Surface Transportation Efficiency Act (ISTEA), the Federal Highway Administration (FHWA) requested that the National Research Council (NRC) conduct a study on nonconventional concrete technology for renewal of the highway infrastructure. ISTEA directed the FHWA to initiate a comprehensive, long-range infrastructure research and development (R&D) program.

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  • Three-dimensional (3D) laser micro-fabrication has become a fast growing field of science and technology. The very first investigations of the laser modifications and structuring of materials immediately followed the invention of the laser in 1960. Starting from the observed photomodifications of laser rod materials and ripple formation on the irradiated surfaces as unwanted consequences of a high laser fluence, the potential of material structuring was tapped.

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  • A complete and permanent hydrophilic modification of poly (ethyleneterephthalate) (PET) films is achieved by argon-plasma irradiation, subsequently grafting acrylic acid (AA) in vapor phase onto their surface. Both Ar plasma irradiation alone and post grafting AA rendered a complete hydrophilicity to PET surfaces. However, the hydrophilicity of the PET surface, only treated with the Ar plasma, is not permanent. In contrast, PET films, irradiated by the Ar plasma, exposed to air, and subsequently grafted with AA monomer, are permanently hydrophilic.

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  • Post-translational glycosylation is one of the most abundant forms of cova-lent protein modification in eukaryotic cells. It plays an important role in determining the properties of proteins, and stabilizes many proteins against thermal denaturation. Protein glycosylation may establish a surface micro-environment that resembles that of unglycosylated proteins in concentrated solutions of sugars and other polyols.

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