Materials Literature
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Modifications of shielding construction materials based on Portland cement with the addition of powder nanomaterial shungite were developed. Attenuation and reflection of electromagnetic radiation for obtained materials were studied. Recommendations for using are given.
Understanding the magnetic properties of graphenic nanostructures is\ninstrumental in future spintronics applications. These magnetic properties are\nknown to depend crucially on the presence of defects. Here we review our recent\ntheoretical studies using density functional calculations on two types of\ndefects in ca…
JUSTIFICATIVA E OBJETIVOS: A ocorrência de hemorragia subaracnoidea (HSA) durante a gravidez é rara, sendo que cerca de metade é devida a malformações arteriovenosas (MAV). Os autores descrevem a abordagem anestésica de uma grávida de 39 semanas proposta para cesárea, com história de HSA por MAV às 22 semanas. RELATO…
For proper use in muscle tissue engineering, myoblasts need to be well differentiated to form functional myotubes. Therefore, in this study, we employ a couple of external physical environment cues, namely an aligned topological feature and an electric field (EF), to enhance the differentiation of myoblasts. Polycapro…
Authors Joana F. Fundo and Mafalda A. C. Quintas acknowledge Fundacão para a Ciência e a Tecnologia grants SFRH/ BD / 62176 / 2009 and SFRH / BPD / 41715 / 2007 respectively
Abstract : The development of a sensing platform to detect and identify biological, chemical, and energetic hazards is a long-sought-after goal of the Army and other first responder communities. Surface enhanced Raman scatting (SERS) is a spectroscopic technique gaining popularity as it address many sensing needs. How…
Several neurodegenerative diseases are characterized by the formation of highly organized and extremely stable fibrillar aggregates as well as their soluble oligomers. One of the approaches to develop therapeutics for these diseases is to destabilize these aggregates and inhibit their formation. Our earlier work with…
Les protéines de soie appartiennent à la classe des protéines de haut poids moléculaire utilisées dans les domaines des biomatériaux et de la médecine régénérative. Ces protéines se caractérisent par d’excellentes propriétés mécaniques, elles sont biocompatibles et biodégradables. Ces propriétés attractives peuvent de…
Las células madre son células especializadas que poseen la capacidad auto-renovación y, al mismo tiempo, pueden generar al menos un tipo de célula madura diferenciada. Representan un pilar fundamental durante la vida de todos los vertebrados. En los últimos años, muchos estudios se han focalizado en la investigación c…
Ferrofluids have great potential in various biomedical applications like in MRI as a contrast agent, Hyperther-mia, Drug delivery, magnetic separation. The special feature of ferrofluid is the combination of normal liquid behavior with superparamagnetic properties. Ferrofluids are synthesized by the chemical co-precip…
Abstract : The use of the low temperature (LT) flowability-improving additive developed in the JP-8+100 LT program was studied for use in Jet A fuels. The results indicate that the LT additive does improve the flowability of near specification maximum freeze point (FP) Jet A fuels (near -40 deg C) when employed at a c…
En el presente trabajo de investigación se realizó un estudio acerca de la\ncaracterización estructural y de las propiedades eléctricas, térmicas y la\nestructura electrónica de los nanomateriales constituidos por nanotubos de\nhaloisita (HNT) y poli(3,4-etilendioxitiofeno) (PEDOT). Los HNT son cerámicos\naislantes de…
Abstract : This research effort involved studies on chemically synthesized quantum dots, epitaxially created quantum dots and graphene thin films. For this report we have gathered together seven research papers on chemically synthesized quantum dots that were published in the last two years. Titles are: Analysis of Th…
The present work shows how to make use of cell biology in corrosion control of technical titanium in highly saline solutions. Besides, it opens the door towards correlating cell secretions with corrosion parameters when live cells are adsorbed on the surface. Generally, the corrosion current density (jcorr, μA/cm2) de…
초고온가스로 핵연료 구형 UCO (uranium oxycarbide) 입자 제조과정 중 중간화합물 제조에서 적용하고 있는 내부겔화 공정을 대체하기 위해 외부겔화공정을 도입하는 연구가 진행 중에 있다. 외부겔화공정을 이용해서 구형 UCO입자를 제조하기 위한 사전실험으로, 중간화합물인 ADU (ammonium di-uranate) 겔 입자를 제조하기 위한 원료용액인 모사 broth 용액을 제조하여 카본블랙 입자를 분산시키는 실험이 수행되었다. 다양한 종류의 카본블랙 입자를 사용해서 모사 broth 용액에 분산실험을 수행한 결과, Cabot G 제품이 용액상에서 분산안정…
Abstract Traditional materials utilized for dental applications have been selected based on their mechanical properties and ability to remain inert in vivo; this selection process has provided materials that satifisfy physiological loading conditions but do not duplicate the mechanical, chemical, and architectural pro…
By exposure to shear strains in solid phase, polyvinyl alcohol was obtained from polyvinyl acetate. The reaction mixture of solid NaOH and polyvinyl acetate was subjected to the combined action of pressure and shear strains in an extruder. The obtained products were characterised by their composition, solubility, mole…
Plastics Engineering is the official publication of the Society of Plastics Engineers (SPE). We provide plastics professionals with a wealth of information about machinery, technological advances, materials innovations, sustainability, and more.
This work was devoted to the production of a polyethylene– polypropylene composite modified with different rubbers – butadiene–styrene rubber, butadiene–acrylonitrile rubber, butyl rubber – in the presence of selenium. It was shown that the obtained composite possesses high thermophysical properties. During processing…
The laws governing the influence of mixed polar and non-polar flexible blocks on the moisture absorption and physicomechanical properties of polyurethane urea were studied, and the relative ratio of these blocks that ensures increased moisture resistance of the material was established.