Materials Literature
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Hierarchical structures enable high-performance power sources. We report here the preparation of vertically aligned carbon nanotubes directly grown on carbon nanofibers (VACNTs/CNFs) by combining electrospinning with pyrolysis technologies. The structure and morphology of VACNTs/CNFs could be precisely tuned and contr…
Here, we report the synthesis of nanosheet-structured boron nitride spheres (NSBNSs) by a catalyzing thermal evaporation method from solid B powders. The NSBNSs consist of radially oriented ultrathin nanosheets with the sheet edges oriented on the surface. Formation of this unique structure occurs only at a certain re…
This study explores different mechanisms of antimicrobial action by designing hybrid nanomaterials that provide a new approach in the fight against resistant microbes. Here, we present a cheap copper-polyaniline (Cu-PANI) nanocomposite material with enhanced antimicrobial properties, prepared by simple in situ polymer…
The paper is dedicated to the 60th anniversary of the Urbach rule. The Urbach edge behaviour, measured by optical absorption spectroscopy, is analysed for different solids. The general regularities of the Urbach rule revealed in crystalline and amorphous solids as well as the temperature behaviour of its main paramete…
We report synthesis of hierarchically porous polymers (HPPs) consisting of micropores and well-defined 3D continuous mesopores by combination of hyper-cross-linking and block polymer self-assembly. Copolymerization of 4-vinylbenzyl chloride (VBzCl) with divinylbenzene (DVB) in the presence of polylactide (PLA) macro-c…
We present an approach for the synthesis of ternary copper indium sulfide (CIS) and quaternary copper indium zinc sulfide (CIZS) nanocrystals (NCs) by means of partial cation exchange with In(3+) and Zn(2+). The approach consists of a sequential three-step synthesis: first, binary Cu2S NCs were synthesized, followed b…
Chitosan has been produced from shrimp waste by chemical method involving demineralization, deproteinization and deacetylation. The quality of chitosan depends on the conditions of the chemical extraction process. The results showed that 3% HCI and 4% NaOH were suitable concentration for demineralization and deprotein…
One property of sulfated cellulose nanocrystals (CNCs) is their ability to self-assemble from a concentrated suspension under specific drying conditions into an iridescent film. Such colored films are very brittle, which makes them difficult to handle or integrate within an industrial process. The goal of this study i…
Abstract Monolayer group-VIB transition-metal dichalcogenides have recently emerged as a new class of semiconductors in the two-dimensional limit. The attractive properties include the visible range direct band gap ideal for exploring optoelectronic applications; the intriguing physics associated with spin and valley…
Το πιο δημοφιλές χόμπι των ενυδρείων τροφοδοτεί την ταχεία ανάπτυξη της βιομηχανίας των διακοσμητικών ψαριών θαλασσινού νερού. Ωστόσο, αυτή τη στιγμή προκειμένου να ικανοποιηθεί η αυξημένη ζήτηση των καταναλωτών υπάρχει μια μεγάλη εξάρτηση από φυσικούς πληθυσμούς διακοσμητικών ειδών. Η ανάγκη για ελεγχόμενη εκτροφή συ…
Η ολική αρθροπλαστική γόνατος αποτελεί μια μέθοδος ρουτίνας για την αντιμετώπιση του πόνου, της παραμόρφωσης και της δυσλειτουργίας της άρθρωσης του γόνατος. Ο ρόλος της φυσικοθεραπείας όσον αφορά την χρησιμότητα και την αποτελεσματικότητά της είναι σημαντική. Έχουν προταθεί πολλά μετεγχειρητικά προγράμματα αποκατάστα…
Σκοπός της παρούσας πτυχιακής εργασίας είναι να μελετήσουμε τις βιολογικές επιδράσεις της ηλεκτρομαγνητικής ακτινοβολίας στον άνθρωπο και κατ’ επέκταση να επισημάνουμε τους τρόπους προστασίας για την υγεία μας. Ο αναγνώστης θα είναι σε θέση να κατανοήσει τη λειτουργία των συστημάτων διαθερμίας βραχέων κυμάτων και υπερ…
Magnetic susceptibility χ, electrical resistivity ρ, thermoelectric power (Seebeck coefficient) S and X-ray diffraction (XRD) measurements of Laves phase compound HfV_2 were measured in the temperature T range from 4.2 to 300 K under magnetic fields B up to 17 T and pressures P up to 1.2 GPa. The data of χ and ρ show…
Este trabalho apresenta o resultado da adição de fibras vegetais de bambu e cana-de-açúcar nas propriedades mecânicas do concreto. Para este trabalho foram confeccionados corpos-de-prova cilíndricos e prismáticos nos quais foram adicionados 2% e 5% em volume das fibras à massa do concreto. Após a cura, conforme NBR 57…
Рассмотрена модель накопления повреждений в деталях машин и конструкций, основанная на теории фракталов. Скрытый процесс разрушения, предшествующий образованию макроскопической трещины, связывается обычно с накоплением микроповреждений. Разработаны различные модели накопления повреждений и роста трещин под действием с…
From Valentine et al, 1968. Biochemistry 7:2143-52 ### Rationale: For the highest resolution with negative staining, there should be little or no support film, but some support is necessary to hold the protein. In this method the proteins are supported by a carbon film and "embedded" in a film of uranyl acetate. The f…
Impact toughness and lateral expansion of the irradiated surveillance specimens for VVER-1000 reactor pressure vessel have been defined using Charpy impact test. The analysis of experimental data has revealed a linear correlation of these characteristics. It was shown that a slope of the regression line is practically…
Glass -ceramic material as main component in aerospace application (shuttle), bio-material for the veneering of metal restoration in destroy. In this work glass-ceramic from raw material (Oxides + BaO) was prepared. The XRD analysis showed that the heat treatment causes a very rapid crystallization process and at 900…
No-Fine concrete filled double steel tube columns (CFDST) are being increasingly used for structural applications. It has been used for submerged tube tunnels, nuclear containment, liquid and gas retaining structures, vessels under external pressure in very deep water and for compression members in offshore constructi…
Authors: Els Verhoeyen and Francois-Loic Cosset Adapted from [*Gene Transfer: Delivery and Expression of DNA and RNA*](http://www.cshlpress.com/link/genetrnp.htm) (eds. Friedmann and Rossi). CSHL Press, Cold Spring Harbor, NY, USA, 2007. ### INTRODUCTION In the protocol presented here, hematopoietic stem cells (HSCs)…