20 articles in this issue
Slawomir PRUCNAL, Lars REBOHLE, JM SUN, Wolfgang SKORUPA, Andrzej DROZDZIEL, Krzysztof PYSZNIAK, Marcin Turek, Janusz FILIKS, Jerzy ZUK
In this work an enhancement of the blue and green electroluminescence (EL) related to silicon inclusions into SiO2 layer by gadolinium co-doping was investigated. The blue (460 nm) and green (550 nm) EL corresponds to the oxygen-deficient-centres (ODC) an... see more
Linas ARDARAVICIUS, Oleg KIPRIJANOVIC, Juozapas LIBERIS
Three-dimensional electron gas/slabs (3DEG/S) can be obtained using the technique of polarization bulk doping in graded AlGaN semiconductor layer on GaN. Transport characteristics of the graded AlGaN are investigated experimentally through nanosecond-puls... see more
Jasmina GRBOVIC NOVAKOVIC, Sandra KURKO, Željka RAŠKOVIC-LOVRE, Sanja MILOŠEVIC, Igor MILANOVIC, Zoran STOJANOVIC, Radojka VUJASIN, Ljiljana MATOVIC
The influence of structural changes caused by irradiation with different ions, their energies and fluences on sorption properties has been investigated. Results suggest that there are several mechanisms of desorption depending on defect concentration, the... see more
Alexandr POGREBNJAK, Viacheslav BAIDAK, Vyacheslav BERESNEV, Petr TURBIN, Nemat MAKHMUDOV, Maxim IL’YASHENKO, Dmitrii KOLESNIKOV, Mannab TASHMETOV
Hard and super hard coatings of Zr-Ti-Si-N of from 2.8 µm to 3.5 µm thickness were fabricated using a vacuum arc source with high frequency stimulation. The samples were annealed in vacuum and in air at 1200°C. It was found that films with a hig... see more
Hande GÜLER
The hot forming process included heating metals to a temperature in the austenite range, transferring the austenitized sheet from the furnace to a press, forming and simultaneously quenched. In this work, Usibor 1500 steel was hot stamped using water-cool... see more
Yong LI, Qiuhua MA, Caiyi HUANG, Guoqin LIU
The crystallization of poly(ethylene glycol) (PEG) in poly(methyl methacrylate) (PMMA) networks were studied, which was compared with that of PEG homopolymer. Melting point (Tm) of PEG in PMMA networks is lower than that of pure PEG; the crystallinity and... see more
Kestutis BELEŠKA, Virgilijus VALEIKA, Justa ŠIRVAITYTE, Violeta VALEIKIENE
The research was aimed to investigate the influence of deliming with peracetic acid on leather dyeing kinetics. Hydrophobic C.I. Acid Red 213 and hydrophilic C.I. Acid Red 423 dyes were used. Sorption of dye depends on hydrophobic... see more
Melek BARDAKCI, Nil BARAN ACARALI, Nurcan TUGRUL, Emek MOROYDOR DERUN, Mehmet Burcin PISKIN
In this study, zinc borate (ZB) was synthesized by reacting zinc oxide and boric acid in the presence of standard ZB (w/w, in terms of boric acid) in order to promote crystallization. The effects of seed, H3BO3/ZnO (boric acid/zinc oxide) ratio, reaction ... see more
Darius MINELGA, Kristina UKVALBERGIENE, Antanas BALTRUŠAITIS, Gintautas BALCIUNAS
It is known that PVA dispersion exhibits very good adhesion with natural wood. However, still remains unclear what adhesion-related changes occur, when the outside factor, i.e. ammonia, affects bonding or what the stability of bonding strength is, when th... see more
Anna BORISOVA, Skaidrite REIHMANE
The nature-inspired theory of hydrophobic surface is an interdisciplinary subject which involves physics, chemistry, material science, and even biology. Nowadays with more developed equipment, we are able to fabricate man-made hydrophobic surfaces which h... see more
Daiva MIKUCIONIENE, Daiva MILAŠIENE
The comfort provided by clothing depends on several factors, one of them being thermal comfort. Human thermal comfort depends on a combination of clothing, climate, and physical activity. It is known, the fibre type, yarn properties, fabric structure, fin... see more
Aušra BANUŠKEVICIUTE, Erika ADOMAVICIUTE, Rimvydas MILAŠIUS
The aim of this study is to form thermoplastic polyurethane (TPU) mats by electrospinning process on knitted and woven materials, and to determine the water permeability of textile materials before and after mat has been formed on them. TPU granules were ... see more
Inga NENIENE, Audrone RAGAIŠIENE, Egle KUMPIKAITE
It is actually for history of textile technologies and Lithuanian culture heritage to investigate deeply peculiarities of manufacturing and appearance of folk textile, to establish local and global tendencies of their distribution. This investigation seek... see more
Edmundas SPUDULIS, Viktoras ŠAVAREIKA, Algimantas ŠPOKAUSKAS
This investigation was made to examine how the conditions of hydrothermal synthesis influence the crystal structure of xonotlite and its morphology. For synthesis we used amorphous silica fume and SiO2/CaO molar ratio equal to 1.0, water-solids ratio W/S&... see more
Violeta LEŠKEVICIENE
In this work, properties of sulphate technogenic raw material – flue gas desulphurization (FGD) gypsum have been investigated in order to obtain a-hemihydrate gypsum as gypsum binding material. FGD gypsum is produced as a by-product during the process of ... see more
Osman GENCEL, Cengiz OZEL, Fuat KOKSAL, Gonzalo MARTÍNEZ-BARRERA, Witold BROSTOW, Hasan POLAT
A fuzzy logic prediction model for fresh and hardened properties of self-compacting concrete (SCC) containingfly ash and polypropylene fibers has been developed. Materials studied experimentally contained 0 %, 10 %, 20 % and 30 wt.% fl... see more
Marijonas DAUNORAVICIUS, Violeta BIELIUNIENE, Aldona RAGAUSKIENE, Edita SMETONAITE
This work focuses on the adjustment of formulations to determine the influence of the main component quantities on render properties. The purpose of the research is to create external silicate renders with high properties by changing the quantities of the... see more
Georgijus SEZEMANAS, Marijonas SINICA, Petro ZACHARCENKO, Natalija PIVENJ, Donatas MIKULSKIS, Modestas KLIGYS
Enclosures that had been built from elements of autoclaved aerated concrete (AAC) often are covered with plasters. Some adhesion problems between plasters and surface exist during the mechanized covering of surfaces of the mentioned enclosures with plaste... see more
Saulius VAITKUS, Ivan GNIP, Sigitas VEJELIS
The results of investigation of strength (s10 %, scr) and deformability (E) characteristics of expanded polystyrene specimens are presented. The results are based on the short-term compression in the organization of long-term creep study. For the exp... see more