Materials Literature
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In this work were prepared pure ZnO and Zn1-xMxO (M= Mn2+ e Co2+) samples by microwave hydrothermal method and analyzed the effect of metal ions on the structure, morphology and the optical properties of the oxide. The powders were obtained at 100ºC with a heating rate of 5ºC/min for 8 min. The material structure was…
Τα νανοϋλικά και κατ' επέκταση τα νανοσύνθετα υλικά, έχουν προσελκύσει τόσο το επιστημονικό όσο και το βιομηχανικό ενδιαφέρον. Σήμερα, τα νανοσύνθετα υλικά είναι αρκετά διαδεδομένα και χρησιμοποιούνται από όλους τους κλάδους της επιστήμης, όπως οργανική χημεία, μοριακή βιολογία, βιοϊατρική και επιστήμη των υλικών. Τα…
Through careful deduction, it becomes clear that information cannot exist without consciousness – the awareness of things. And to be aware is to hold the meaning of relationships of objects within consciousness – perceiving abstract objects, while enjoying degrees of freedom within the structuring of those relationshi…
The growing exploration of nanoparticles (NPs) engineered structures that have at least one dimension between 1 and 100 nm has a wide range of applications in many fields. The aim of the present study was evaluate the cytotoxic, mutagenic and recombinogenic effects of: 1] Amorphous Zinc oxide (ZnO), used as cement in…
Abstract Glycidamide (GA) can be synthesized from acrylonitrile (AN) by using hydrotalcite as a solid base catalyst and 25% aqueous H2O2 as an oxidant, in the presence of acrylamide (AA) as a cocatalyst in methanol solvent at 313 K for 18 h. The GA yield and H2O2 utilization efficiency reached 74% and 60%, respectivel…
We now turn to the derivation of lifetime, assuming region I behavior. We first determine lifetime in the residual-stress-free case. While almost all flaws have residual stress (see Chapter 6),we need to understand the basic formulation before undergoing the more torturous calculations demanded in the residual stress…
The position of wavelength in a grating spectrometer depends mainly on the line frequency and the working angle of the grating, as calculated by Eqs. (2.1), (2.4), and (2.5), and derivations. A prism spectrometer will output a certain wavelength as a function of the prism dispersion, which depends on the RI of the pri…
The collimation obtained in the manner shown in Fig. 1.10(b) uses a suitable projection lens with diameter-to-focal-length ratios (d/F ) that are limited to about 1:10 and do not yet require spherical correction. Many low cost monochromats are available for optical components having large diameters. Optical component…
A technical realization for enhancing regular interferometric sensitivity is shown in Fig. 10.1(a). The errors of a Fizeau beamsplitter T, rear mirror M (usually the sample), and included medium (air) are accumulated both longitudinally (wanted) and, inseparably, laterally (unwanted). The resulting error summation upo…
The equations required to specify a spectrometer [Eqs. (2.1)–(2.5)] are discussed at the beginning of Chapter 2. This chapter mainly deals with the specific features of the different types of gratings. Information brochures and books are available from some grating suppliers. The parameters of a prism are also discuss…
The preceding chapters presented a plethora of equations and formulations, with several examples illustrating the analyses. In this section we bring together all that we have learned into one final example. Reference to the chapters and equations are made to assist in the computation and understanding. A certain glass…
Involving the Jordan inverse Introduction In Subsection 4.1.1, we introduce the notion of a Jordan-invertible (in short J-invertible) element of a unital Jordan algebra, as well as that of the J-inverse of such an element. As we notice in §4.1.1, these notions generalize the classical ones of an invertible element and…
Introduction A considerable number of books and review articles have been written on biological materials, and they constitute the foundation necessary to embrace this field. Some of the best known are given in Table 2.1. Table 2.2 lists some of the key review articles in the field. An important step was taken by D’ A…
Abstract Not Provided
Bioinspired materials and biomimetics The ultimate goal for a materials engineer is to learn from the lessons of nature and to apply this knowledge to new materials and design. This is not a new quest, and humans have sought inspiration from nature since prehistory. The early materials used by humans were primarily na…
Introduction There are numerous silicate- and calcium-carbonate-based biominerals in biological systems. Their function is, for most of them, protection. They provide a hard shell beneath which the softer organism can survive and prosper. Exceptions are the sponges. We will provide illustrative examples and describe t…
The use of cellulose nanocrystals (CN) as a reinforcing agent for polymeric matrices has attracted considerable attention because the cellulose nanocrystal-based nanocomposites typically exhibit thermal, mechanical and superior barrier properties compared to the pure polymer or conventional composites and additionally…
Abstract Not Provided
In den vergangenen Jahren sind Lipide, Membranen und deren Organisationsformen mehr und mehr in den Fokus der biologischen Forschung gerückt. Es wurde vorgeschlagen, dass in zellulären Membranen selbstassemblierende, submikroskopische Aggregate aus Sphingolipiden, Cholesterol und bestimmten Proteinen existieren und ma…
This research project is focused on (1) development of novel scanning probe microscopy techniques for investigation of the thermally and electrically induced changes in the physical properties of organic polymer ferroelectrics; (2) fabrication of ferroelectric nanostructures and investigation of their functional behav…