Materials Literature
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Chitosan is a polycationic polymer and waste product from the seafood-processing industry. Chitosan is produced from crustacean shells mainly by removal of proteins and by dissolution of calcium carbonates. The biocompatible and non-toxic nature of chitosan is much suitable for the synthesis of nanoparticles for pharm…
Este trabalho teve como objetivo o estudo e otimização dos principais parâmetros influenciadores do processo de síntese da granada de itérbio e alumínio (YbAG) codopada com érbio e molibdénio usando o método de autocombustão em solução (SCS). O estudo de otimização consistiu na variação controlada de parâmetros como a…
Desde a sua introdução, em meados dos anos 90, a técnica de Layer-by-Layer tem sido muito utilizada para a produção hierárquica de filmes com múltiplas camadas. É um método versátil e económico que consiste na deposição alternada de diversos materiais sobre um substrato através de forças eletrostáticas e/ou não eletro…
This article presents the results of the ratio of the additional energy costs caused by the work of compression of the working cylinders in the disconnected cylinders before the change in the additional energy costs of the engine. Along with the engine vibration, the internal forces of the oscillating system also work…
This article substantiates the need for a comprehensive comparative analysis of limiting plastic strains model's, which are proposed in domestic and foreign literature over the past half century. The citation analysis of some of the most popular works devoted to the development of fracture criteria during plastic stra…
Cancer is one of the leading causes of death worldwide, and current therapeutic options present numerous drawbacks. Chemotherapy, specifically, is associated with widely known side effects. However, and due to the scientific and technologic advances of the past years, a new approach to this dilemma appears in nanomedi…
Straipsnyje įvardyti jonizuojančiosios gama spinduliuotės šaltiniai, jų rūšys, galimas poveikis žmonėms bei aplinkai. Aptarta gamtinės kilmės išorinė ir vidinė žmogaus apšvita. Pateikiamos svarbiausios sąvokos ir radiaciniuose matavimuose vartojami terminai. Nagrinėjami gama radiacinio fono tyrimų Šiaulių mieste rezul…
El sistema granito-aplopegmatitas de Tres Arroyos (Badajoz) se localiza en las proximidades del batolitode Nisa-Alburquerque. Segun su mineralogia y sus caracteristicas petrograficas y geoquimicas, se handescrito cinco facies, dos graniticas (monzogranito y granito marginal) y tres aplopegmatiticas (esteriles,intermed…
Marine research comprehends the significance of algae-based value-added products and has elicited a boom of the algal market, where algal harvesting remains a big challenge. Chitosan is a chitin derivative, obtained by the process of deacetylation under alkaline conditions or by hydrolysis using chitin deacetylase. Pr…
All companies aim to produce the best quality product and receive the highest profit. Also ensuring a healthy environment for employees is of high importance. Choosing the right type of spray booth will assure the latter in any company that is involved in painting. The article reviews and evaluates different airflow t…
Les travaux réalisés dans cette thèse ont pour but de tester deux argiles: la bentonite de maghnia,l’argile de Djabel Debbagh de Ain Berbar ainsi une bentonite modifiée par la cellulose en vue d’éliminer trois colorants acides : le Jaune Rubinol, le Jaune Irionyl, le Rouge Ispersol et deux pesticides Décis et Rodazine…
Utilising industrial waste materials containing pozolanic compounds has been widely investigated for cement replacement. Fly ash and microslilica are materials having significant pozolanic compounds and can be used to create ternary cementitious system. Slump of fresh concrete, porosity and compressive strength of har…
O comportamento critico de sistemas que exibem magnetismo tem sido objeto de intensa pesquisa. O modelo de Heisenberg merece especial atencao por se tratar de uma ferramenta a ser empregada para a descricao das propriedades de muitos materiais magneticos, isolantes e anisotropicos. Alem disso, sabe-se que a considerac…
In this chapter, the author outlines the research process, specifically the methodological choices made over the course of the study and the implications such choices had for the way she handled the data. She also outlines the reader on a retrospective voyage of the research process, the destination being the point wh…
O objetivo deste trabalho foi estudar um aço SAE 1095, fundido, com diferentes tratamentos térmicos para verificar a influência da microestrutura na resistência ao desgaste abrasivo. Os corpos de prova foram submetidos a tratamentos térmicos, ensaios de dureza e ensaios de desgaste abrasivo e caracterização microestru…
REALISATION DE SERIE D4IMAGE EN UTILISANT ecstm FAIRE une etude comparative et definire le role de la microstructure
In contrast to monolayer graphene, in bilayer graphene (BLG) one can induce a tunable bandgap by applying an external electric field, which makes it suitable for field effect applications. Extrinsic doping of BLGs enriches the electronic properties of the graphene-based family, as their behavior can be switched from a…
Ce travail vise a mieux comprendre et modeliser les mecanismes de rupture ductile pour les microstructures heterogenes. La principale methodologie du projet repose sur la combinaison de trois techniques : la laminographie in situ par rayonnement synchrotron,la correlation d’images volumiques (DVC) et la simulation par…
This manuscript is mainly focused on the influence of repulsion between free electrons on the optical response of metals. Classical material models consider that the metallic response is local -- i.e. that the response at a given point only depends on the fields at this point. Taking into account the repulsion between…
Alignments of the sequence capture loci and GenBank loci.