Search
Filters
total: 1548
filtered: 1166
displaying 1000 best results Help
Search results for: cold-formed sections
-
Numerical Study of the Impinging Jets Formed by an Injector with Different Nozzle Diameters
PublicationThe collision of two or more liquid jets may provide considerable atomisation and efficient mixing of injected substances at the same time. This phenomenon is used, among others, in rocket engines, where the fuel and oxidiser are introduced separately and almost immediately mixed through self-impingement. Depending on the injection and operating conditions, diverse configurations of impinging jets are used, such as doublets,...
-
Turbulent flow and heat transfer of a liquid film formed by impinging jet.
PublicationZaproponowano prosty model wymiany ciepła w turbulentnym filmie cieczowym utworzonym przez uderzająca strugę. Rozpatrzono dwa przypadki: przepływ rozwijający się i w pełni rozwinięty filmu cieczowego. W obu przypadkach model wyprowadzono na podstawie zmiany grubości filmu w wyniku działania sił bezwładności i sił tarcia. Wyznaczono profile prędkości w obu zakresach co umożliwia wyznaczenie współczynników wymiany ciepła.
-
Photovoltaic properties of organic heterojunctions formed from tetracene and zinc hexadecafluorophthalocyanine
PublicationPraca omawia własności fotowoltaiczne organicznego heterozłacza: tetracen-perfluoroftalocyanina cynku. W pracy przedstawione są charakterystyki prądowo-napięciowe, zależność prądu zwarcia od natężenia oświetlenia oraz spektralna charakterystyka prądu zwarcia.
-
Analysis of a caustic formed by a spherical reflector: Impact of a caustic on architectural acoustics
PublicationFocusing sound in rooms intended for listening to music or speech is an acoustic defect. Design recommendations provide remedial steps to effectively prevent this. However, there is a category of objects of high historical or architectural value in which the sound focus correction is limited or even abandoned. This also applies to indoor or outdoor concert shells, installations for teaching and acoustic presentations, etc. The...
-
Mapping the Transglycosylation Relevant Sites of Cold-Adapted β-D-Galactosidase from Arthrobacter sp. 32cB
PublicationB-Galactosidase from Arthrobacter sp. 32cB (ArthbetaDG) is a cold-adapted enzyme able to catalyze hydrolysis of beta-D-galactosides and transglycosylation reaction, where galactosyl moiety is being transferred onto an acceptor larger than a water molecule. Mutants of ArthbetaDG D207A and E517Q were designed to determine the significance of specific residues and to enable formation of complexes with lactulose and sucrose and to...
-
In Situ Random Microseeding and Streak Seeding Used for Growth of Crystals of Cold-Adapted beta-D-Galactosidases: Crystal Structure of betaDG from Arthrobacter sp. 32cB
PublicationThere is an increasing demand for cold-adapted enzymes in a wide range of industrial branches. Nevertheless, structural information about them is still scarce. The knowledge of crystal structures is important to understand their mode of action and to design genetically engineered enzymes with enhanced activity. The most difficult task and the limiting step in structural studies of cold-adapted enzymes is their crystallization,...
-
THE GENE CLONING, OVEREXPRESSION, PURIFICATION AND BIOCHEMICAL CHARACTERISATION OF A NEW COLD-ADAPTED β–GALACTOSIDASE FROM ARTHROBACTER SP. VII-4
PublicationINTRODUCTION. β-Galactosidase [EC 3.2.1.23] is an enzyme that catalyzes the hydrolysis of O-glycosidic linkages in galactosides. It is commercially used in dairy industry for the production of milk with reduced lactose content. Potentially, the best method for lactose removal under cooling conditions should be carried out with a cold-adapted enzyme. AIM. The aim of this study was to determine the taxonomic affiliation of the isolate...
-
Intense and stable room-temperature photoluminescence from nanoporous vanadium oxide formed by in-ambient degradation of VI3 crystals
PublicationVanadium oxides have attracted research interest because their optoelectronic properties make them optically active with room-temperature photoluminescence (PL) emission, which, however, is not sufficiently intense for real applications. For this reason, many nanostructured vanadium oxides are currently fabricated through several precursors and different treatments to improve the PL efficiency and enhance the PL intensity. Herein,...
-
Cold Start Emissions Investigation at Different Ambient Temperature Conditions
Publication -
Biological Effects of Cold Atmospheric Pressure Plasma on Skin Cancer
Publication -
Shotgun Lipidomic Analysis for Differentiation of Niche Cold Pressed Oils
Publication -
Fabrication and photoactivity of organic-inorganic systems based on titania nanotubes and PEDOT containing redox centres formed by different Prussian Blue analogues
PublicationHerein, the heterojunction composed of an inorganic substrate: ordered hydrogenated titania nanotubes (H-TiO2NTs) and a deposited organic film: poly(3,4-ethylenedioxythiophene) (PEDOT) is reported. The conducting polymer is modified with different transition metal haxacyanoferrates (Mehcf), wherein as metal: copper, iron, cobalt and nickel are introduced. The presence of various metal centres provides characteristic redox activity...
-
TIME-OF-FLIGHT DIFFERENTIAL ELECTRON SCATTERING FROM MOLECULAR TARGETS: BENCHMARK CROSS SECTIONS
PublicationWe report time-of-flight differential cross section (DCS) measurements for the electron impact excitation transition in H2. In this work, agreement between available theory and experiment is excellent overall, and marks a transition in electron molecule scattering where differential scattering of excitation is found to be in such precise agreement. We also prove that the newly built apparatus can be used for accurate measurement...
-
Refined theoretical study of radiative association: Cross sections and rate constants for the formation of SiN
PublicationRadiative association of silicon mononitride (SiN) in its two lowest molecular electronic states is studied through quantum and classical dynamics. Special attention is paid to the behavior of the cross section at high collision energies. A modified expression for the semiclassical cross section is presented which excludes transitions to continuum states. This gives improved agreement with quantum mechanical perturbation theory...
-
Cross sections calculations for electron scattering from dimethylamine, NH(CH3)2, molecule
PublicationThe total cross section for single electron-impact ionization and the integral elastic cross section for electron scattering from dimethylamine have been calculated using the binary-encounter-Bethe model and the independent atom method, respectively.
-
Computer graphics toos application for visualsation of measurements results of ship hull sections and blocks.
PublicationOpisano zakres minimalnych wymagań dla programu komputerowego, służącego do wizualizacji wyników pomiarów sekcji i bloków kadłuba okrętowego. Przedstawiono sposób przenoszenia danych z urządzenia pomiarowego do programu i pokazano przykłady pomiarów wykonanych na sekcjach zbudowanych w Stoczni Gdynia S.A.
-
Measurements of differential cross sections for elastic electron scattering in the backward direction by molecular oxygen.
PublicationZmierzono różniczkowe przekroje czynne na rozproszenie sprężyste elektronów na cząsteczkach tlenu w zakresie kątów rozproszenia 100-180 st., dla wybranych energii padających elektronów w przedziale 7-20eV. Do pomiarów wykorzystano metodę lokalnego pola magnetycznego.
-
Mechanical and Physicochemical Properties of Newly Formed ZnO-PMMA Nanocomposites for Denture Bases
Publication -
Influence of silver nanoparticles addition on antibacterial properties of PEO coatings formed on magnesium
PublicationMagnesium is a biodegradable material and thus could be a choice for bone fixation devices and implants with a specific purpose. This study aims to enhance the anti-corrosive, biocompatible, and antibacterial properties on magnesium-based materials through ceramic coatings formation. To achieve this the silicate-based electrolyte was used to create of Plasma Electrolytic Oxidation (PEO) coatings. During investigation the bioactive...
-
Wear and corrosion characteristics of the layers type (mn-p) formed on aluminium alloys
Publicationopisano multipleksową metodę wytwarzania warstw zawierających mangan i fosfor (mn-p) na stopach aluminium. przedstawiono wyniki badań mikrostruktury, właściwości tribologicznych i korozyjnych tych warstw. stwierdzono obecność tlenku manganu i fosforku manganu w wytworzonych warstwach oraz ich wysoką twardość, rzędu 1272 hv0,02. warstwy typu (mn-p) zmniejszają podatność stopu alsi13mg1cuni na korozję w 0,01 mh2so4.
-
Comparison of pavement noise properties on selected road sections using different CPX measuring systems: self-powered vehicle and special test trailer
PublicationThe recently published ISO standard intended to measure the noise properties of road surfaces in a standardized method (ISO 11819-2:2017) precisely defines measurement procedure of the influence of road surface on traffic noise. According to it, two types of test vehicles may be utilized: a self-powered vehicle fitted with one or more test tyres and a trailer towed by a separate vehicle with one or more test tyres mounted on the...
-
Analysis of free vibrations of cantilever bars with parabolically variable cross-sections using the Rayleigh’s method
Publication -
Differential cross sections for elastic electron scattering in xenon in the energy range from 5ev to 10ev
PublicationRóżniczkowe przekroje czynne na rozproszenie sprężyste elektronów na atomach ksenonu zmierzone zostały dla energii 5, 7.9 i 10eV w zakresie kątów rozproszenia 30°-180°. W pomiarach wykorzystano technikę lokalnego pola magnetycznego. Wyznaczono także całkowity przekrój czynny na rozproszenie sprężyste oraz przekrój czynny na przekazanie pędu poprzez scałkowanie zmierzonych różniczkowych przekrojów czynnych dla wybranych energii....
-
Measurements of absolute total cross sections for electron scattering fromtriatomic polar molecules: SO2 and H2S.
PublicationZmierzono całkowity przekrój czynny na rozproszenie elektronów na SO2 i H2S.Pomiary przeprowadzono na zmodyfikowanym spektrometrze elektronów pracującym w oparciu o metodę transmisyjną.
-
Analiza wad powierzchni gorącowalcowanych wyrobów stalowych = Hot rolled sections surface defects analysis
PublicationZanalizowano hutnicze wady powierzchni dwuteowników walcowanych na gorąco, głebokość zdefektowanych obszarów i zmiany mikrostruktury w tych obszarach.
-
The influence of cold season warming on the mercury pool in coastal benthic organisms
Publication -
Note on the Harmonic Approximation in the Treatment of Entanglement: N Cold Trapped Ions
Publication -
RDE Testing of Passenger Cars: The Effect of the Cold Start on the Emissions Results
Publication -
Weather-Dependent Variation in the Cold-Season Diet of Urban KestrelsFalco tinnunculus
Publication -
A cold-adapted esterase from psychrotrophic Pseudoalteromonas sp. strain 643A
PublicationDzięki zastosowaniu lipaz możliwa jest biotechnologiczna produkcja m.in. biodegradowalnych biopolimerów, biopaliw (tzw. biodiesel), wielu terapeutyków, herbicydów, pestycydów, kosmetyków, substancji smakowych, serów i in. Szczególnie interesującą grupę stanowią enzymy lipolityczne, pochodzące z organizmów psychrofilnych i psychrotrofowych, ze względu na zdolność do wydajnego katalizowania reakcji w temperaturach rzędu 10-20 ºC....
-
Cold sintering of colloidal silica particles using different alkali solutions
Publication -
Effect of welding conditions on susceptibility to cold cracking of underwater welded joints
PublicationPrzedstawiono wybrane aspekty spawalności stali przy spawaniu pod wodą metodą lokalnej komory suchej. Zwrócono szczególną uwagę na skłonność do tworzenia peknięć zimnych w SWC. Przy pomocy planowania doświadczeń określono ilościowy wpływ parametrów spawania na naprężenia krytyczne z próby implant.
-
Seed-Roasting Process Affects Oxidative Stability of Cold-Pressed Oils
Publication -
The Impact of Protective Gloves on Manual Dexterity in Cold Environments—A Pilot Study
Publication -
Artificial Superhydrophobic and Antifungal Surface on Goose Down by Cold Plasma Treatment
Publication -
Analysis of the posibbility of detect determination using cold excitation in thermal tomography
Publication -
Effect of native air-formed oxidation on the corrosion behavior of AA 7075 aluminum alloys
Publication -
Potential of Biocellulose Carrier Impregnated with Essential Oils to Fight Against Biofilms Formed on Hydroxyapatite
Publication -
On photovoltaic effect in hybrid heterojunction formed from palladium phthalocyanine and titanium dioxide layers
PublicationPraca omawia własności fotowoltaiczne hybrydowego heterozłączy utworzonego z ftalocyjaniny palladu i dwutlenku tytanu. Warstwy TiO2 otrzymano metodą zol-żel, a warstwę organiczną nanoszono metodą próżniowego naparowywania. W pracy przedstawione są charakterystyki prądowo-napięciowe, zależność prądu zwarcia i napięcia rozwarcia od natężenia oświetlenia oraz spektralna charakterystyka prądu zwarcia.
-
Photovoltaic effect in hybrid heterojunction formed from cadmium telluride and zinc perfluorophthalocyanine layers
PublicationPraca przedstawia wyniki badań zjawska fotowoltaicznego w planarnym układzie złożonym z następujących warstw: ITO, CdTe, perfluoroftalocyjanina cynku, BCP, Ag.
-
Phenomenon of hydraulic jump formed on liquid layer by single-phase impinging liquid jet
PublicationPrzedstawiono analizę teoretyczną zjawiska uskoku hydraulicznego tworzonego przez uderzającą strugę. rezultaty analizy teoretycznej porównano z wynikami badań eksperymentalnych.
-
Evaluation of mercury content in combustible tobacco products by employing cold vapor atomic absorption spectroscopy and considering the moisture content: a comprehensive study
PublicationPlants are mainly made up of water, which constitutes between 80 and 90% of their weight. Moisture factor comes across as one of the most important in tobacco products. Rapid determination of moisture content in tobacco products comes at neces- sity in any tobacco management plants (before and after production). Therefore, the concern has been raised in this study to evaluate the moisture content in four kinds of combustible tobacco...
-
Impact of a newly-formed periglacial environment and other factors on fresh water chemistry at the western shore of Admiralty Bay in the summer of 2016 (King George Island, Maritime Antarctica)
PublicationThis study provides a comprehensive analysis of the inorganic chemistry of flowing water at the western shore of Admiralty Bay. In the water samples, ions, and major and trace metals (and B)were detected and quantified. Additionally, the parameters of pH, specific electrolytic conductivity (SEC25) and total organic carbon (TOC) were determined. Moreover, multivariate data set was created and Principal Component Analysis (PCA) was...
-
A new cold-adapted beta-D-galactosidase from the Antarctic Arthrobacter sp. 32c - gene cloning, overexpression, purification and properties
PublicationThe development of a new cold-active β-D-galactosidases and microorganisms that efficiently ferment lactose is of high biotechnological interest, particularly for lactose removal in milk and dairy products at low temperatures and for cheese whey bioremediation processes with simultaneous bio-ethanol production. In this article, we present a new β-D-galactosidase as a candidate to be applied in the above mentioned biotechnological...
-
Differential cross sections for electron impact vibrational excitation of molecular oxygen in the angular range 15° - 180°.
PublicationZmierzono absolutne różniczkowe przekroje czynne na wzbudzenie drobin tlenu do poziomów oscylacyjnych v=1-4 stanu podstawowego X3 suma g. Pomiary wykonano dla energii elektronów równej 10eV w zakresie kątów rozproszenia od 15° do 180°.
-
Jurassic–Cretaceous transition in the Transdanubian Range (Hungary): integrated stratigraphy and paleomagnetic study of the Hárskút and Lókút sections
Publication -
An Analysis of Periodic Arrangements of Cylindrical Objects of Arbitrary Convex Cross Sections with the Use of Field Matching Method
PublicationA problem of electromagnetic wave scattering from multilayered frequency selective surfaces is presented. Each surface is composed of periodically arranged cylindrical posts of arbitrary convex cross-section. The method of analysis is based on the direct field matching technique for a single cell, and the transmission matrix method with the lattice sums technique for periodic arrangement of scatterers.
-
Differential cross sections for elastic electron scattering in argon over the angular range 130-180 st.
PublicationPomiary różniczkowych przekrojów czynnych na rozpraszanie sprężyste na atomach argonu w zakresie kątów 130-180 st. dla elektronów o energiach 5, 7.5 i 10 eV. W pomiarach wykorzystano technikę lokalnego pola magnetycznego.
-
Taking advantage of the shared explicit cache system based critical sections in the shared memory parallel architectures
PublicationArtykuł prezentuje nową metodę implementacji sekcji krytycznych w równoległych architekturach z pamięcią współdzieloną, takich jak systemy zintegrowane wielowątkowe wieloprocesorowe. Metoda stanowi modyfikację i rozbudowanie metody zwanej Folding, dostępnej w procesorach sieciowych oraz jest w założeniach podobna do techniki zwanej cache-based locking. W porównaniu do dostępnych metod, nowa metoda usuwa problemy skalowalności i...
-
Variational approach for interacting ultra-cold atoms in arbitrary one-dimensional confinement
Publication