wyświetlamy 1000 najlepszych wyników Pomoc
Wyniki wyszukiwania dla: JAHN-TELLER EFFECT
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THE EFFECT OF WOOD DRYING METHOD ON THE GRANULARITY OF SAWDUST OBTAINED DURING THE SAWING PROCESS USING THE FRAME SAWING MACHINE
PublikacjaThe experimental results of the study focused on the effect of drying processes of warm air drying at the temperature of 6580°C and warm air-steam mixture drying at the temperature of 105°C of pine and beech wood to the size of sawdust grains created by cutting using RPW 15M frame saw is presented in the paper. Particle size analysis of dry sawdust was performed using two methods - screening method and optical method based on...
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The ILs-assisted electrochemical synthesis of TiO2 nanotubes: The effect of ionic liquids on morphology and photoactivity
PublikacjaFacile and environmentally benign one-step titanium anodization method for TiO2 nanotubes (NTs) formation in a presence of ionic liquids (ILs) was proposed. Influence of the IL structure and its content in ethylene glycol electrolyte on morphology, surface properties and photoactivity of the TiO2 NTs was investigated. Possible interactions between IL and TiO2 NTs as well as the mechanism of NTs formation during anodic oxidation...
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Effect of the Cavitation Generation Unit Structure on the Performance of an Advanced Hydrodynamic Cavitation Reactor for Process Intensifications
PublikacjaThe advanced rotational hydrodynamic cavitation reactors (ARHCRs) that appeared recently have shown obvious advantages compared with conventional devices in process intensifications. In ARHCRs, the cavitation generation unit (CGU) located on the rotor and stator basically determines their performance. For the first time, the present study investigated the effect of the CGU structure on the performance of a representative ARHCR...
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Superconductivity and appearance of negative magnetocaloric effect in Ba1–xKxBiO3 perovskites, doped by Y, La and Pr
PublikacjaRecently, substantial attention is given to the bismuth-based perovskites for variety of electronic applications. The perovskites are used for quantum dots displays (QLED), photovoltaic systems and superconducting (HTS) devices. In this paper comprehensive studies of Ba1–xKxBi1–yREyO3 bismuth perovskites (REBKBO, RE = Y , La or Pr) are reported. Apart from structural anomalous behavior at low temperatures, the electronic properties...
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Study of pH and temperature effect on lipophilicity of catechol-containing antioxidants by reversed phase liquid chromatography
PublikacjaLipophilicity of selected antioxidant phytochemicals, including flavonoids, phenolic acids and xanthonoids, was determined by reversed phase high performance liquid chromatography with UV detection (RP-HPLC-UV). The analyses run at different temperature and pH conditions in isocratic mode suggested that lipophilicity as distribution coefficient (logD) between aqueous and organic phase decreases with increasing temperature. For...
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The effect of different accelerators on the reclaiming efficiency of ground tire rubber
Dane BadawczeThe presented results concern the influence of different accelerators on the reclaiming efficiency of ground tire rubber (GTR). All the specimens were prepared using a two-roll mill and each sample was prepared in the same manner. Samples were submitted to curing analysis via Rheometer Monsanto 100S after 24 hours of aging. The attached data are related...
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The effect of roasting beetroot and chicory on the anti-oxidative activity of their extracts
Dane BadawczeThe eThe data set presents the results of the assessment of the impact of roasting raw materials in the form of beetroot and chicory on their antioxidant activity measured by the standard ABTS and DPPH radical tests. The numerical results were compared with the visual assessment of the roasted raw materials. The obtained results confirmed the increase...
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The effect of changes in the concentration of hydroxypropylcellulose on the rheological stability of pectin hydrogels.
Dane BadawczeThe rheological characteristics of the pectin hydrogel modified by hydroxypropylcellulose (added in a concetration range from 0.1 to 0.55% m/m) were made on the basis of the viscosity assessment using a Brookfield viscometer with an LV SC4 - 25 spindle and a shear rate of 0,22 s-1 in the temperature range 19-96 ° C.The data allowed selection of optimal...
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Effect of antitumor compounds on the yeast topoisomerase II relaxation activity
Dane BadawczeThe datasets contain results of antitumor compounds* (known inhibitors of human topoisomerase alpha II) inhibitory activity against yeast topoisomerase II. DNA topoisomerases (Topo) are enzymes that catalyze changes in the spatial structure of DNA and play an important role in replication, transcription and recombination. Beyond their normal functions,...
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Hyperbaric Storage at Subzero Temperature – the Effect on the Shelf-Life and Selected Quality Characteristics of Raw Pork Sausages
PublikacjaThe aim of this study was to determine the microbiological stability and changes occurring in selected physicochemical properties of raw pork sausages during hyperbaric storage at subzero temperature (HS-ST). It was shown that storage at moderate pressures (up to 111 MPa) led to a reduction in microbial populations. After 21 days of storage under these conditions, no microorganisms were detected in the samples. Additionally, the...
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Numerical and experimental study on effect of boundary conditions during testing of stiffened plates subjected to compressive loads
PublikacjaThis study analyses the effect of boundary conditions during testing on the structural behaviour stiffened plates with different thicknesses subjected to compressive loads. The goal of the compressive tests is to analyse the ultimate strength of a stiffened plate. During the test, relevant physical quantities are measured and investigated. The supporting structure's behaviour is investigated by analysing the force-displacements...
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Effect of osmolytes on the thermal stability of proteins: replica exchange simulations of Trp-cage in urea and betaine solutions
PublikacjaAlthough osmolytes are known to modulate the folding equilibrium, the molecular mechanism of their effect on thermal denaturation of proteins is still poorly understood. Here, we simulated the thermal denaturation of a small model protein (Trp-cage) in the presence of denaturing (urea) and stabilizing (betaine) osmolytes, using the all-atom replica exchange molecular dynamics simulations. We found that urea destabilizes Trp-cage...
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The effect of preparation route on structure and photocatalytic properties of bimetallic nanoparticles (Au/Pd, and Au/Pt) deposited at TiO2 surface
PublikacjaNoble metal nanoparticles have often been used to enhance the photocatalytic activity of TiO2 and to extend the absorption wavelength from the ultraviolet to visible region. Bimetallic nanoparticles, composed of two different metal elements, can exhibit peculiar electronic, optical, and catalytic or photocatalytic properties that are absent in the corresponding monometallic nanoparticles. In this work we show the effect kind and...
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Fatigue life prediction of notched components under size effect using strain energy reformulated critical distance theory
PublikacjaNotch and size effects show significant impact on the fatigue performance of engineering components, which deserves special attention. In this work, a strain energy reformulated critical distance theory was developed for fatigue life prediction of notched components under size effect. Experimental data of different notched specimens manufactured from GH4169, TC4, TC11 alloys and low carbon steel En3B were used for model validation...
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The effect of high pressure at subzero temperature on proteins solubility, drip loss and texture of fish (cod and salmon) and mammal’s (pork and beef) meat
PublikacjaOne of the possibilities of using high pressure technique in inactivation of microorganism is conducting this process at subzero temperature. However, for its practical application in meat preservation the appropriate properties of meat should be kept. Therefore, the aim of this work was to examine the effect of pressure at subzero temperature (without freezing of water) on proteins and texture of mammal’s and cold-adapted fish...
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Synthesis of CoFe2O4 Nanoparticles: The Effect of Ionic Strength, Concentration, and Precursor Type on Morphology and Magnetic Properties
PublikacjaThe present study highlights the effect of metal precursor types (SO4 2¯, Cl¯, and NO3¯), their concentration, and the influence of ionic strength of reaction environment on the morphology, surface, and magnetic properties of CoFe2O4 particles. The magnetic nanoparticles were obtained by chemical coprecipitation in alkaline medium at increasing metal concentration in the range of 0.0425 mol·dm-3 to 0.17 mol·dm-3 and calcination...
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The effect of heat treatment of hardwood on the specific cutting resistance
PublikacjaW pracy przedstawiono wyniki badań mocy skrawania podczas przecierania modyfikowanego i niemodyfikowanego termicznie drewna dębowego i jesionowego na pilarce ramowej PRW15M. W pierwszym etapie badań, graniakowe próbki drewna dębowego i jesionowego były modyfikowane termicznie za pomocą przegrzanej pary (temperatura 197C, czas 4 h) w parzelni wysokotemperaturowej, w warunkach przemysłowych. Następnie, wyznaczono właściwe powierzchniowe...
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The Effect of Aggregate Shape on the Properties of Concretes with Silica Fume
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Effect of Indium on the Properties of Mg-Zn-Based Alloys
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EFFECT OF CHITOSAN AND META-TOPOLIN IN MICROPROPAGATION OF VACCINIUM CORYMBOSUM
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Effect of substituting Fe and Ru for Ni on the thermopower ofMgCNi3
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Effect of Ru substitution for Ni on the superconductivity inMgCNi3−xRux
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The effect of heating and fermenting on antioxidant properties of white cabbage
PublikacjaIt is widely believed that natural antioxidants found in food are significantly lost during processing. Nevertheless, it was recently demonstrated that processed fruits and vegetables may retain their antioxidant activity. In the present work, the changes in the overall antioxidant properties as a consequence of fermentation of cabbage and/or heat treatment of cabbage juices and extracts were studied. Fermentation processes as...
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Effect of high pressure of selected bacteria at subzero temperature
PublikacjaCelem pracy było określenie przeżywalności wybranych bakterii gramdodatnich i gramujemnych poddanych działaniu podwyższonego ciśnienia w zakresie od 60 do 193 MPa w ujemnej temperaturze. Wrażliwość bakterii na zwiększone ciśnienie zależy od fazy wzrostu w jakiej się one znajdują. Z reguły bakterie gramdodatnie są bardziej odporne na ciśnienie niż bakterie gramujemne. Wykazano, że różnice w odporności pojawiają się nie tylko pomiędzy...
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Terrestrial water storage variations and their effect on polar motion
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Entanglement in Hooke’s Law Atoms: an Effect of the Dimensionality of the Space
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High pressure effect on charge transfer transition in Y2O2S:Eu3+
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Effect of psoriasis activity on serum adiponectin and leptin levels
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Effect of tantalum interlayer on hydroxyapatite biointerface for orthopedic applications
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Effect of Sibutramine on Cardiovascular Outcomes in Overweight and Obese Subjects
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The Effect of Spikes Occurrence on Surface Texture Parameter Assessments
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The effect of heat exchanger geometry on adsorption chiller performance
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The Effect of Cold Plasma on Selected Parameters of Bovine Colostrum
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Effect of personalized ventilation on individual employee performance and productivity
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Effect of head-to-tail cyclization on conformation of histatin-5
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Effect of water content on the characteristics of hydro-compacted nanosilica
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The effect of the concentration of steel fibres on the properties of industrial floors
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Effect of CPAP on Blood Pressure in Patients With OSA/Hypopnea
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The photovoltaic effect in a heterojunction of molybdenyl phthalocyanine and perylene dye
PublikacjaPraca przedstawia wyniki pomiarów efektu fotowoltaicznego w układzie zbudowanego z warstw: tlenek indowo-cynowy, barwnik perylenowy, ftalocyjanina molibdenylu, złoto. Obserwowany efekt fotowoltaiczny jest wynikiem dysocjacji ekscytonów na granicy - barwnik perylenowy/ftalocyjanina. W interpretacji wyników uwzględniono procesy generacyjno-rekombinacyjne w złączu.
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Atomic substitution and carbon isotope effect in superconducting MgCNi3
PublikacjaW pracy analizowany jest wpływ domieszkowania zarówno pozycji niklu, jak i węgla w nadprzewodzącym związku międzymetalicznym MgCNi3. Dodatkowo dyskutowany jest węglowy nadprzewodzący efekt izotopowy.
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Effect of substituting Fe and Ru for Ni on the thermopower of MgCNi3
PublikacjaDyskutowany jest wpływ domieszkowania żelaza i rutenu w pozycje niklu w międzymetalicznym związku nadprzewodzącym MgCNi3, na wartość termosiły. Pomiar S(T) wskazuje, że nośnikami ładunków elektrycznych w MgCNi3 są elektrony, a domieszkowanie (Ru, Fe) wprowadza nośniki dziurowe. Nie stwierdzono wpływu momentu magnetycznego atomów Fe na wartość termosiły.
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The Effect of Temperature on Wear Mechanism of the AlCrN Coated Components
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Effect of wear on EHD film thickness in sliding contacts
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EFFECT OF THE BIO-LUBRICANT ON THE LUBRICATINGPROPERTIES AND SURFACE OF THE FRICTION ZONE
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Effect of ageing automotive gear oils on scuffing and pitting
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Effect of increased protein intake on the risk of female infertility
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The effect of social media communication on consumer perceptions of brands
PublikacjaResearchers and brand managers have limited understanding of the effects social media communication has on how consumers perceive brands. We investigated 504 Facebook users in order to observe the impact of firm-created and user-generated (UG) social media communication on brand equity (BE), brand attitude (BA) and purchase intention (PI) by using a standardized online survey throughout Poland. To test the conceptual model, we...
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Effect of power frequency on the stress state of disc actuator
PublikacjaThis paper presents the concept of determining the optimum frequency of coil supply in inductive-dynamic drive. As a criterion to obtain the sought frequency, the smallest value of reduced stress in the disc was assumed while maintaining the desired dynamics. The disc stress is determined on the basis of solution of vibrating thin plate equation. Magnetic pressure acting on the disc is obtained from a hybrid circumferentially-field...
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Effect of microstructure on mechanical properties of BA1055 bronze castings
PublikacjaThe article presents research results performed on aluminum bronze CuAl10Fe5Ni5 (BA1032) castings used for marine propellers. Metallographic studies were made on light microscope and a scanning electron microscope to assess quantitatively and qualitatively the alloy microstructure. It has been shown that the shape, size and distribution of the iron-rich phase precipitates in bronze microstructure significantly affect its mechanical...
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Effect of power frequency on the stress state of disc actuator
PublikacjaThe paper presents the concept of determinig the optimum frequency of coil supply in inductive-dynamic drive. As a criterion to obtain the sought frequency, the smallest value of reduced stress in the disc was assumed while maintaining the desired dynamics.