Materials Literature
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Electron-beam-induced deposition of materials has been known for almost 40 years from contamination writing. It has developed into “additive lithography” with nanometer resolution employed in scanning electron microscopes, in dedicated lithography systems, in reducing image projection systems, and in scanning tunnelin…
The chemical inertness and corrosion resistance of a boron‐doped diamond thin film electrode, grown by chemical vapor deposition (CVD), have been studied during potential cycling (PC) for 2 h in a solution of at 50°C. Similar experiments were performed on highly ordered pyrolytic graphite (HOPG) and glassy carbon (GC)…
A myosin phosphatase was purified from chicken gizzard smooth muscle. The holoenzyme is a trimer and consists of 130,000-, 38,000-, and 20,000-Da subunits (in agreement with the results of Alessi et al.: Alessi, D., MacDougall, L. K., Sola, M. M., Ikebe, M., and Cohen, P. (1992) Eur. J. Biochem. 210, 1023-1035). The c…
The influence of chemical admixtures (superplasticizer-retarder) and active silica minerals (fraction less than 45 μm) in cement hydration, mechanical strength increase and variations of the physical properties of light weight mortars with partially zeolitized Cuban tuffs is evaluated.
Hydroxyapatite Ca5(PO4)3OH (HAp) is a crystalline phase which has several applications within the domain of special cements. This phase takes an important role in the cement reactions for the reconstruction of skeletal functions (medical domain). It is used also to improve properties of dental material. On the other h…
The use of low-emittance coating (low-E) glasses in Europe and the United States is not recent (they make use of them long since: 10-15years), nevertheless they are almost unknown in Spain, in all respects, in spite of being commercialized long since by different houses, specialists in these matters. We run into a lac…
Article Effect of Adhesion and Filler Composition on the Mechanical Response of a Polypropylene/[CaC03/Mica] Composite was published on December 1, 1994 in the journal Science and Engineering of Composite Materials (volume 3, issue 4).
Cathodoluminescing features in brown diamonds correlate with the crystalline microstructure as observed by transmission electron microscopy. We identified distinctive emissions at 415.3, 425, 491.3 and 525 nm. The first two correlate with the so-called N3 and band-A emissions, while the last correlates with what is ca…
The cross section for total scattering by clusters of spheres is derived from an integration, over a closed spherical surface, of the scattered Poynting flux associated with the different pairs of spheres in the ensemble. With the use of the addition theorem for vector spherical harmonics the integral can be evaluated…
This paper presents the study of the nature and conservation state of different stuccos and Roman concretes from the Roman city of Baelo Claudia (Cádiz). The chemical, mineralogical and microstructural compositions of the said materials have been established. Different causes of their decay have been found, among whic…