Materials Literature
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In Spain, the waste management options include either the possibility of a final storage in a deep geological repository (DGR) or the centralized temporal surface disposal (CTS). DGRs are based in a multi-barrier concept with the geological barrier and including the vitrified waste, the metal containers and engineered…
A quitosana pode ser modificada e intercalada em silicatos em camadas, através de reação de troca catiônica, resultando em nanocompósitos com propriedades funcionais e estruturais interessantes. Neste estudo, nanocompósitos quitosana/bentonita natural foram preparados pelo processo de intercalação por solução e a infl…
The starch market has been growing and improving, leading to search for products with unique functional properties that industry requirements. The use of native starches is limited, depending on the processing conditions such as temperature, pH, pressure restricting its application in industrial scale. The production…
Polímeros heterocíclicos são macromoléculas de elevado desempenho que incluem uma grande variedade de materiais, desde simples polímeros lineares preparados a partir de monômeros do tipo heterocíclicos vinílicos, até polímeros funcionalizados e reticulados. Neste trabalho realizou-se a modificação química da poliacril…
Polyelectrolyte multilayer films are self-assembled architectures forming nm to µm thick films. During the last decade, they have emerged as an efficient way of modifying materials surface properties such as chemistry, physico-chemical properties, topography as well as mechanical properties. Thanks to the technology's…
Ce travail traite du role joue par les fonctions de surface sur le transport et le piegeage de cations alcalins en presence d'eau, dans des SBA-15 fonctionnalisees. Il s'agit aussi d'etudier les effets de confinement sur la thermodynamique de l'eau adsorbee. La premiere etape a consiste a synthetiser les differentes S…
Light localization is controlled at a scale of lambda/10 in the harmonic regime from the far field domain in a plasmonic nanoantenna. The nanoantenna under study consists of 3 aligned spheres 50 nm in diameter separated by a distance of 5 nm. By simply tuning the orientation of an incident plane wave, symmetric and an…
Spontaneous synaptic vesicle fusion is triggered by soluble proteins that compete with synaptotagmins to induce membrane curvature.
This chapter contains sections titled: Nitrifying bacteria Cyanobacteria (blue-green algae)
This chapter contains sections titled: Introduction Algae Macrophytes
Organic/inorganic composite electrolyte membranes were prepared for dye sensitized solar cell (DSSC). Poly (ethylene glycol) (PEG)s with various molecular weight (600, 1,500, 2,000 and 3,400) were ethoxysilated to fabricate organic/inorganic composite materials through sol-gel processes. The electrolyte membranes were…
Montmorillonite is a "green" solid catalyst and support used in many organic reations. In this paper, we describe the method to prepare two acid-activated montmorillonites from Binh Thuan and Lam Dong clays. We still prepared some cation exchanged montmorillonites as Fe3+ Zn 2+ and Al 3+. The Vietnamese montmorillonit…
This paper presents the effect of Cadium in Aluminium alloys on mechanical property and phase transformation in the alloys. The Aluminium 4,8Cu 0,6Mn 0,2Ti alloys that contain between 0,150 and 0,288 Cadmium not only enhanced strength but also stabilized physical-mechanical properties. These characteristics are partic…
This article studied corrosion behavior of steel and sacrificial anode on ship's shell in the clean and polluted water of Thi Vai River at room temperature by mass loss, potentiodynamic polarization and electrochemical impedance spectroscopy methods. The experimental results showed that the life of ship's shell was dr…
A volume of 600 mL of sludge, in 4.1 L sample bottles (Appendix 7.6), will be placed in either a Super Pig (Ref. 1) or Piglet (Ref. 2, 3) based on shielding requirements (Ref. 4). Two Super Pigs will be placed in a Standard Waste Box (SWB, Ref. 5), as their weight exceeds the capacity of a drum; two Piglets will be pl…
Nanotubos de Carbono (NTC) sao obtidos pelo enrolamento de uma ou varias folhas do grafeno, em dimensoes nanometricas formando um tubo de paredes simples (SWNTC) ou de parede multiplas (MWNTC). As propriedades eletricas, magneticas, opticas e mecânicas fazem dos nanotubos de carbono materiais fascinantes e atrativos p…
The formation of graphene on the (0001) surface of SiC (the Si-face) is studied by atomic force microscopy, low-energy electron microscopy, and scanning tunneling microscopy/spectroscopy. The graphene forms due to preferential sublimation of Si from the surface at high temperature, and the formation has been studied i…
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Twist Blockage An investigation has been carried out into the twist blockage which may occur when yarns pass over guides or other surfaces where the influence of primary physical parameters such as surface curvature, arc and length of contact, yarn twist level and tension and yarn/surface friction have been investigat…
Axicons first appeared by this name in 1954, when all elements that focus light onto the axis were called axicons. The name is a combination of the Greek words for axis and image. Cone shaped lenses are now commonly regarded as axicons. Their behavior and design possibilities are widely studied, yet primarily refracti…