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    Wyświetlanie 1-10 z 10
    Tytuł:
    Właściwości i struktura wody na granicach międzyfazowych
    Properties and structure of water at interfaces
    Autorzy:
    Paluch, Maria
    Powiązania:
    https://bibliotekanauki.pl/articles/972292.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    granica faz woda/powietrze
    granica faz woda/ciecz
    granica faz woda/ciało stałe
    water/air interface
    water/liquid interface
    water/solid interface
    Opis:
    The purpose of this paper is to show development of investigations concerning the properties of water at the water/air, water/insoluble liquid and water/solid interfaces. The special attention was drawn on structure and forces acting at those interfaces.
    Źródło:
    Wiadomości Chemiczne; 2019, 73, 7-8; 491-503
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Click Reactionat an Oil-Water Interface Using Hydrophobic and Hydrophilic Polymers
    Autorzy:
    Ashaduzzaman, Md.
    Kai, S.
    Kunitake, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/412120.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    click reaction
    hollow-capsules
    oil-water interface
    tri-arm polystyrene
    copolymer
    Opis:
    Cu(I)-catalyzed Huisgen click reactions between lipophilic polymer (tri-arm azidofunctionalized polystyrene) and hydrophilic polymer (copolymer of styrene sulfonate sodium and propargyl methacrylate) were investigated and hollow capsules, consisting of composite polymer nanofilms were obtained in chloroform-water biphasic solution. Since the lipophilic polymer, or hydrophilic polymer and copper catalyst were present in the oil or aqueous phase, respectively, the cross-linking reaction proceeded only at the phase interface. The combination of lipophilic and hydrophilic polymers produced hollow capsules consisting of nanofilms with lipophilic core and hydrophilic shell.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 6; 31-39
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kinetics of marine surfactant adsorption at an air-water interface. Baltic Sea studies
    Autorzy:
    Pogorzelski, S.J.
    Kogut, A.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/48394.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    coastal water
    water interface
    surface adsorption
    marine film
    kinetics
    Baltic Sea
    adsorption barrier
    adsorption
    Opis:
    The paper contains the results of studies of natural surface film adsorption kinetics carried out in inland waters and in shallow offshore regions of the Baltic Sea during 2000–01 under calm sea conditions. The novel approach presented here for the adsorption dynamics is based on the mixed kinetic-diffusion model and analyses of the surface pressure-time plots at short (t → 0) and long (t→∞) adsorption time intervals. Values of the effective relative diffusion coefficient Deff/D (= 0.008 − 0.607) and energy barrier for adsorption Ea/RT (= 0.49 − 7.10) agree well with the data reported for model non-ionic surfactant solutions of pre-cmc concentrations. Wind speed is one of the factors affecting the adsorption barrier via the increased surface pressure of the natural film exposed to wind shear stress (∼ U10 2),a nd enters the relation Ea/RT = 1.70U10 1/3.
    Źródło:
    Oceanologia; 2001, 43, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adsorption of hexane and cyclohexane vapours at the water drop surface
    Autorzy:
    Miller, R.
    Aksenenko, E. V.
    Kovalchuk, V. I.
    Tarasevich, Y. I.
    Fainerman, V. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/110244.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    water-heptane vapour interface
    drop profile analysis tensiometry
    dynamic surface tension
    adsorption kinetics
    Opis:
    The dependence of the dynamic surface tension of water at the interface with saturated hexane and cyclohexane vapours was measured by the drop profile analysis method. The surface tension for the adsorption layers of cyclohexane at different temperatures was compared with the results reported earlier for the adsorption of hexane and other alkanes from the vapour phase on water drops. It is shown that cyclohexane is adsorbed significantly slower than the adsorption of hexane occurs, and is characterised by a much larger induction time. The error in the drop radius measurements at 40 ºC attains 45 m. The experimental rheologic characteristics of the adsorbed layers are studied and the results are compared with the model developed to describe an adsorption process governed by a kinetic mechanism.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 1; 54-62
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Swobodna powierzchnia wody i jej fizykochemiczne właściwości
    Free surface of water and its physicochemical properties
    Autorzy:
    Paluch, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/171602.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    granica faz woda/powietrze
    swobodna powierzchnia wody
    struktura powierzchni swobodnej wody
    potencjał powierzchniowy wody
    water air interface
    structure of free surface of water surface potential of water
    Opis:
    The purpose of this paper is to show how interesting is free surface of water and how many problems connected with its properties were investigated. Some of them were studied in twenty century, another are quite new. The special attention was drawn to orientation of water molecules at water/air interface and connected with this orientation electric surface potential drop existing at the free surface. To date, there is no consensus both as to its value and sign. This is due to the impossibility of direct measurement of the surface potential, which caused that many scientists have attempted to estimate the value and sign of this potential indirectly by measuring other physical parameters or using simulation methods. The paper present also such properties of water/air interface as: surface density, surface viscosity, dielectric permittivity, surface conductivity ,surface tension and their changes as a result of adsorption process. As we can see from the review outlined in the paper the free surface of water in spite of long and different of studies is still fascinating for many scientists.
    Źródło:
    Wiadomości Chemiczne; 2015, 69, 7-8; 541-557
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charge-pumping characterization of SOI devices fabricated by means of wafer bonding over pre-patterned cavities
    Autorzy:
    Głuszko, G.
    Łukasiak, L.
    Kilchytska, V.
    Chung, T. M.
    Olbrechts, B.
    Flandrie, D.
    Raskin, J. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/308669.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    charge-pumping
    electrical characterization
    interface traps
    SOI
    water bonding
    Si layer transfer
    Opis:
    The quality of the silicon-buried oxide bonded interface of SOI devices created by thin Si film transfer and bonding over pre-patterned cavities, aiming at fabrication of DG and SON MOSFETs, is studied by means of chargepumping (CP) measurements. It is demonstrated that thanks to the chemical activation step, the quality of the bonded interface is remarkably good. Good agreement between values of front-interface threshold voltage determined from CP and I-V measurements is obtained.
    Źródło:
    Journal of Telecommunications and Information Technology; 2007, 3; 61-66
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recent software improvements in moisture [TDR method], matric pressure, electrical conductivity and temperature meters of porous media
    Autorzy:
    Skierucha, W.
    Wilczek, A.
    Walczak, R.T.
    Powiązania:
    https://bibliotekanauki.pl/articles/24442.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    moisture
    electrical conductivity
    user interface
    temperature
    porous medium
    soil water
    soil salinity
    time domain reflectometry
    soil temperature
    water content
    Źródło:
    International Agrophysics; 2006, 20, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Water column conditions in a coastal lagoon near Jeddah, Red Sea
    Autorzy:
    Albarakati, A.M.A.
    Ahmad, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/48751.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    water column
    coastal lagoon
    Red Sea
    heat balance
    air-sea interface
    stratification
    wind stress
    heat flux
    bottom topography
    Źródło:
    Oceanologia; 2012, 54, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface waves in deep and shallow waters
    Autorzy:
    Massel, S.R.
    Powiązania:
    https://bibliotekanauki.pl/articles/48826.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    surface wave
    deep
    shallow water
    dynamic factor
    marine environment
    atmosphere-ocean interaction
    ocean form
    air-sea interface
    hydrodynamics
    Opis:
    The motion of water due to surface waves is the most dynamic factor observed in the marine environment. In this review various aspects of the wave modelling of non-linear, steep surface waves and their role in the atmosphere-ocean interaction are discussed. Significant improvements in wave forecasting have been made in the last ten years. This is to a large extent related to substantial progress in the description of wind forcing and other processes, as well as to the more efficient use of satellite observations and assimilation methods. One striking observation is the increasing variety and complexity of models in which more physical processes are implemented, greater precision and resolution achieved and extended ranges of applicability demonstrated. However, in order to evaluate the applicability of particular models, comparison with high quality experimental data, collected in nature or under laboratory conditions, is necessary.
    Źródło:
    Oceanologia; 2010, 52, 1; 5-52
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adsorption of natural surfactants present in sea waters at surfaces of minerals: contact angle measurements
    Autorzy:
    Mazurek, A.
    Pogorzelski, S.J.
    Boniewicz-Szmyt, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/48416.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    mineral
    Baltic Sea
    natural surfactant
    solid-liquid interface
    Gdansk Gulf
    film pressure
    contact angle hysteresis
    film-covered surface
    sea water
    adsorption
    Opis:
    The wetting properties of solid mineral samples (by contact angles) in original surfactant-containing sea water (Gulf of Gdańsk,Ba ltic) were characterised under laboratory conditions on a large set (31 samples) of well-classified stones of diverse hydrophobicity using the sessile drop (ADSA-P approach),ca ptive bubble and inclined plate methods. An experimental relation between the static contact angle θeq and stone density ρ was obtained in the form θeq = Bρ + C,wher e B = 12.23 ± 0.92, C = −(19.17 ± 0.77),an d r2 = 0.92. The histogram of θeq distribution for polished stone plates exhibited a multimodal feature indicating that the most abundant solid materials (hydrophilic in nature) have contact angles θeq = 7.2,10. 7,15. 7 and 19.2◦,whic h appear to be applicable to unspecified field stones as well. The contact angle,a pH-dependent quantity,ap pears to be a sensitive measure of stone grain size,e.g . granite. The captive bubble method gives reproducible results in studies of porous and highly hydrophilic surfaces such as stones and wood. The authors consider the adsorption of natural sea water surfactants on stone surfaces to be the process responsible for contact angle hysteresis. In the model,an equation was derived for determining the solid surface free energy from the liquid’s surface tension γLV; it also enabled the advancing θA and receding θR contact angles of this liquid to be calculated. Measurements of contact angle hysteresis Δθ(= θA − θR) with surfactant-containing sea water and distilled water (reference) on the same stone surfaces allowed the film pressure ΔΠ (1.22 to 8.80 mJ m−2), solid surface free energy ΔγS (−17.03 to −23.61 mJ m−2) and work done by spreading ΔWS (−1.23 to −11.52 mJ m−2) to be determined. The variability in these parameters is attributed to autophobing,an effect operative on a solid surface covered with an adsorptive layer of surfactants. The wetting behaviour of solid particles is of great importance in numerous technological processes including froth flotation,d emulgation,an ti-foaming procedures and the coal industries. It is believed that the approach presented here and the examples of its application to common sea water/solid mineral systems could be successfully adapted to optimise several surfactant-mediated adsorption processes (see below) of practical value in natural water ecology.
    Źródło:
    Oceanologia; 2009, 51, 3; 377-403
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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