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Dispersebility degree influence of glass fibre E in the mechanical behaviour and workability of plaster
Although there are many research studies about plaster strengthened with glass fibre E in Spain, there are no publications which advise the users (plasterers, manufacturers of prefabricated blocks or suspended ceilings, etc) about the most appropriated types of fibre E in respect to its dispersebility degree in the ma…
Alkaline activated slag cements. Determination of reaction degree
The aim of the present work was to evaluate the validity of non-calorimetric different methods, used in the determination of reaction degree of alkaline activated slag pastes. The methods used were: (a) chemical separation by methanol-salicylic acid; (b) determination of the weight loss mass between 100-600°C in TG cu…
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Editorial
Evaluation of treatment products for the front door of the church of Santiago, Guadix
In a previous article the materials and the state of conservation of the Front Door of the church have been characterized, with the aim of determining the causes and the alteration mechanisms that are present in it. In the present work the behaviour of several treatments, water repellents and/or consolidants, is evalu…
Research about the pozzolanic activity of waste materials from calcined clay
To recycle and reutilise waste materials and find definite applications for their use, it is necessary to have a deep knowledge of them. The aim of this study is to study the possibility of using waste materials from calcined clay, actually ceramic tile, once crushed and grounded, as pozzolanic material. For this purp…
Pozzolanic properties of residues of sugar industries (second part)
Results of studies conducted in lime pozzolana pastes are introduced in this paper. The pozzolana was sourced from Sugar Cane Baggasse Ash (CBC) and Sugar Cane Straw Ash (CPC). The hydration of this binder was carefully monitored by means of instrumental techniques with the aim of describing the kinetics of the reacti…
Prevention and curing of efflorescences in the restoration of bricks construction
After description of basic principles of efflorescent effect in bricks in a former published paper, where the classification and examples of efflorescences were given, here are shown the methods for prevention and techniques for curing of this pathology. Some comments about Standards are included as well as very brief…
The role of phonons in the thermodynamics of the martensitic transformation in NiTi
Measurements of neutron inelastic scattering, thermal expansion and low-temperature heat capacity were used to study the phonon entropy of the martensite-to-austenite transformation in NiTi, which is found to be (0.5 ± 0.05) k B atom−1. The inelastic scattering spectra were corrected for the differing scattering ampli…
Identification of the intracellular polyhydroxyalkanoate depolymerase gene of Paracoccus denitrificans and some properties of the gene product
Paracoccus denitrificans degraded poly(3-hydroxybutyrate) (PHB) in the cells under carbon source starvation. Intracellular poly(3-hydroxyalkanoate) (PHA) depolymerase gene (phaZ) was identified near the PHA synthase gene (phaC) of P. denitrificans. Cell extract of Escherichia coli carrying lacZ--phaZ fusion gene degra…
Influence of weather conditions and soil properties on degradation of biodegradable plastics in soil
Climatic and soil factors responsible for the degradation of biodegradable plastics in soil were analyzed by placing poly-(3-hydroxy-butylate-valerate) (PHB/V), poly-(ɛ:-caprolactone) (PCL), poly-(butylene succinate) (PBS), poly-butylene succinate and adipate) (PBSA), and poly-lactide (PLA) in soil at 19sites in Honsh…
Extraction of Gelatin from Megrim ( Lepidorhombus boscii ) Skins with Several Organic Acids
ABSTRACT: Light‐colored, dry collagen was obtained and, after dissolving in warm water, turned into soluble gelatin. The type of acid used influenced the gelatin viscoelastic and gelling properties. Acetic‐ and propionic‐acid extracts produced the gelatins with the highest elastic modulus, viscous modulus, melting tem…
High‐Surface‐Area Alumina Ceramics Fabricated by the Decomposition of Al(OH) 3
Al 2 O 3 ‐based porous ceramics with high surface areas were fabricated by adding Al(OH) 3 to the starting powder, followed by pressureless sintering at temperatures >1100°C. Three types of starting powders were used in the present study: pure α‐Al 2 O 3 , α‐Al 2 O 3 + Al(OH) 3 , and α‐Al 2 O 3 + ZrO 2 + Al(OH) 3 .…
CuMn2O4: properties and the high-pressure induced Jahn-Teller phase transition
Single crystal x-ray diffraction, x-ray photoelectron spectroscopy and magnetic susceptibility measurements at normal pressure have shown that, in spite of two Jahn-Teller active ions in CuMn 2 O 4 , the crystal is cubic with partly inverse spinel structure, the inversion parameter being \mbox{$x = 0.8$}. The cation c…
Physical and Mechanical Properties of Pea‐Protein‐based Edible Films
ABSTRACT: Edible films produced from denatured pea protein concentrate (PPC) solution possessed the strength and elasticity to resist handling. Increasing the concentration of the plasticizer (glycerol) in the film decreased tensile strength and elastic modulus, and increased elongation and water vapor permeability (W…
Stretched Polyaniline Films Doped by (±)-10-Camphorsulfonic Acid: Anisotropy and Improvement of Thermoelectric Properties
The stretched polyaniline films doped by (±)-10-camphorsulfonic acid exhibited significant anisotropy of the electrical and thermoelectric properties. The thermoelectric figure-of-merit (ZT) of the stretched films in the direction parallel to the stretching direction is much higher than that of the unstretched counter…
CsMn(Br_xI_{1-x})_3: Crossover from an XY to an Ising Chiral Antiferromagnet
We report on high-resolution specific-heat and magnetocaloric-effect measurements of the triangular-lattice antiferromagnets CsMn(Br_xI_{1-x})_3 with different x. The evolution of the magnetic phase diagrams from the easy-axis system for x = 0 to the easy-plane system for x = 1 was studied in detail. The specific-heat…
Stochastic resonance induced by random fields in ferroelectrics
We propose a mechanism of stochastic resonance induced by spatial noise (electric random fields) in ferroelectrics. The calculations demonstrate the characteristic of the stochastic resonance: certain random field can increase the susceptibility, the phonon occupancy, and the overcooled temperature. This mechanics of…
Global Equation of State of two-dimensional hard sphere systems
Hard sphere systems in two dimensions are examined for arbitrary density. Simulation results are compared to the theoretical predictions for both the low and the high density limit, where the system is either disordered or ordered, respectively. The pressure in the system increases with the density, except for an inte…