Influence of Crystallinity and Stereochemistry on the Enzymatic Degradation of Poly(lactide)s
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Materials Literature
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Molecular and Mesoscopic Structures of Transparent Block Copolymer−Silica Monoliths
Mesoscopically ordered, transparent silica−surfactant monoliths have been prepared using amphiphilic triblock poly(ethylene oxide)−poly(propylene oxide)−poly(ethylene oxide) (PEO−PPO−PEO) copolymer species to organize polymerizing silica networks. The block copolymer acts as a structure-directing agent, as the aqueous…
Editorial
Influence of the environment on weathering of limestone: study through mercury porosimetry
The physic-chemical processes of decay in building materials and, particularly those affecting petreum materials, obey to different causes as composition, morphology, texture, the orientation of the material in the building and, mainly, its interaction with the environment. Because of their chemical composition, limes…
Influencia de la adición del BaCO3 sobre la hidratación del cemento portland
The effect of incorporation of BaCO3 in portland cement hydration has been studied. From this study it is inferred that presence of BaCO3 in cements makes them require a higher quantity of mixing water. However, mechanical resistances do not seem negatively affected, for a formation of carboaluminates by chemical reac…
Congresos, Seminarios y Cursos
Computer Assisted Stereology Of Short Fibre Composites, I: Determination Of Fibre Length Distribution
Un método rápido y no-destructivo para medir la permeabilidad al aire del hormigón
New device for non-destructive test. It is designed for "in situ" measurement of the impermeability to air of a concrete coating. The system is based on creating a vacuum inside a cell placed on its surface, and to measure how long does it take for the pressure to be back to the atmospheric value. The characteristic a…
Optimal Stacking Sequence Design of Laminated Composite Shells
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On the Work Hardening Behaviour of a Rheocast SiC Reinforced Aluminum Metal-Matrix Composite
Effect of Plasma Treatment on Microstructure and Surface of Glass for Plastic-Based Composite
Rheological Study of the Interfacial Crosslinking Reaction in Reactive Polymer Blends
Two reactive methacrylic polymers were synthesized by copolymerization of isobutylmethacrylate with a small amount of either methacrylic acid or glycidyl methacrylate. In a molten blend, the condensation reaction between the acid and epoxy groups leads to crosslinking at the interface between the domains formed by the…
On-line or Process Viscometry – A Review
Process viscometry has many advantages in terms of saving time and gaining more immediate information about a process. However, it can also has disadvantages in terms of compromises that must be made in taking a stream of liquid and passing it through a viscosity-measuring element. The latter operation can be a strong…
Academic Rheology and Industrial Rheology
This paper is an attempt to highlight the problems faced by industrial rheologists. The problems are far more complex than subjects of usual academic pursuit. Because of the lack of scientific methods in both theory and instruments, the industrial rheologist often resort to empirical approach such as a use of the proc…
Loss Tangent for Low Loss Thermoplastic Composites
Immobilisation/solidification of hazardous toxic waste in cement matrices
Immobilization and solidification of polluting waste, introduced into the industrial sector more than 20 years ago, and throughout last 10 years is being the object of a growing interest for engineers and environment scientists, has become a remarkable standardized process for treatment and management of toxic and haz…
The UV-VIS spectrophotometry applied to color and stability study in colored mortars
In the field of methodologies for color studying, a research of it has been done on colored mortars by applying uv-vis spectrophotometry, instrumental technique which can be used for solid materials works, and previously applied to building materials study. Results obtained show that the mentioned technique permits to…
RAPID EXTRACTION OF HIGH-QUALITY CHITOSAN FROM MYCELIA OF ABSIDIA GLAUCA
A rapid two-step extraction method for high quality fungal chitosan from Absidia glauca was developed. Fungal mycelia are autoclaved in a 1M caustic soda solution at 121C for 15 min. The alkali-insoluble-materials obtained are then further autoclaved for 15 min in a 2% aqueous acetic acid solution. There was a relativ…
High and Low Dielectric Constant Materials
Silicon-based dielectrics (SiO 2 , Si 3 N 4 , SiO x N y etc.) have been widely used as the key dielectrics in the manufacturing of silicon integrated circuits (ICs) and virtually all other semiconductor devices. Dielectrics having a value of dielectric constant k × 8.854 F/cm more than that of silicon nitride (k >…