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Tytuł:
Interakcje między wychowankami a wychowawcami w placówkach opiekuńczo-wychowawczych
Interactions between pupils and educators in care and educational institutions
Autorzy:
Abramczuk, Michał Paweł
Powiązania:
https://bibliotekanauki.pl/articles/44718637.pdf
Data publikacji:
2024-02-23
Wydawca:
Akademia Pedagogiki Specjalnej im. Marii Grzegorzewskiej. Wydawnictwo APS
Tematy:
interakcje
placówka opiekuńczo-wychowawcza
wychowawca
wychowanek
interactions
care and educational institution
educator
pupil
Opis:
Celem artykułu jest przybliżenie rodzajów interakcji, które zachodzą między wychowankami a wychowawcami placówek opiekuńczo-wychowawczych. Materiał zawiera też charakterystykę zachowań oraz wybranych uwarunkowań, jakie towarzyszą tym interakcjom. W podjętych eksploracjach badawczych poszukiwano odpowiedzi na następujące pytanie: Jakie rodzaje interakcji zachodzą między wychowankami a wychowawcami placówek opiekuńczo-wychowawczych oraz jakie czynniki warunkują te interakcje? Przedstawiony problem został rozwiązany, a cel osiągnięty za pomocą metody socjometrycznej, wywiadu ukierunkowanego oraz kwestionariusza ankiety. Grupą badanych byli wychowankowie oraz wychowawcy (po 14 z każdej grupy) dwóch placówek opiekuńczo-wychowawczych na terenie Warszawy. Za pomocą dostępnych narzędzi, badani określali zarówno pozytywne, jak i negatywne cechy wychowanków oraz wychowawców. Dzięki przeprowadzonym badaniom udało się poszerzyć wiedzę na temat interakcji, jakie zachodzą między wychowankami a wychowawcami, określić czynniki warunkujące te interakcje oraz wprowadzić do praktyki wychowawczej wskazówki sprzyjające efektywności pracy na linii wychowanek–wychowawca.
The aim of this article is to present the types of interactions between pupils and educators of care and educational institutions. It also contains characteristics of behaviours and selected determinants accompanying these interactions. The research sought answers to the following question: What types of interactions occur between pupils and educators of care and educational institutions, and what factors determine these interactions? The presented problem was solved, and the goal was achieved by means of the sociometric method, the targeted interview and the survey questionnaire. The group of respondents were pupils and educators (fourteen from each group) of two care and educational institutions in Warsaw. Using available tools, the respondents determined both positive and negative characteristics of pupils and educators. Thanks to the conducted research, it was possible to expand knowledge about the interactions that occur between pupils and educators, specify the factors determining these interactions and introduce into educational practice guidelines conducive to the effectiveness of work between pupils and educators.
Źródło:
Problemy Opiekuńczo-Wychowawcze; 2024, 626(1); 45-54
0552-2188
Pojawia się w:
Problemy Opiekuńczo-Wychowawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
X-ray diffraction and vibrational spectroscopic studies of the intermolecular interactions on the grinding and compaction behaviours of lopinavir and ritonavir crystals
Autorzy:
Ainurofiq, Ahmad
Setianto, Arif B.
Nugraha, Yuda P.
Suendo, Veinardi
Uekusa, Hidehiro
Soewandhi, Sundani N.
Powiązania:
https://bibliotekanauki.pl/articles/895537.pdf
Data publikacji:
2020-04-29
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
compression
grinding
Vibrational spectroscopy
Ritonavir
intermolecular interactions lopinavir
crystal behaviour
Opis:
Lopinavir (LPV) and ritonavir (RTV) are anti-viral drugs used in combination and commonly prepared through hot-melt extrusion techniques. Mechanical processes are greatly involved, including blending and milling. Therefore, the crystal behaviour of LPV and RTV under the mechanical process is an interesting study. Here, the LPV, RTV, and their mixtures were processed by two different treatments: grinding and compression processes. The solid-state properties of the drugs were evaluated by powder x-ray diffraction (PXRD), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and scanning electron microscopy (SEM). Single-crystal XRD analysis was also carried out to confirm the packing structure in the crystal lattice. It was observed that LPV was very sensitive to the grinding process, where it tends to form an amorphous solid in both the pure and mixture forms. On the other hand, RTV has a very stable crystalline structure and was able to retain its crystallinity even under grinding. Both LPV and RTV were observed to be quite stable under compression, where both retained their crystalline form with only slight changes in their d-spacing values. This study highlighted the molecular origin of LPV and RTV crystal behaviour after grinding and compression processes.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 2; 259-269
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling drug-receptor interactions in an average binding site for NK2
Autorzy:
Alagona, G.
Ghio, C.
Monti, S.
Powiązania:
https://bibliotekanauki.pl/articles/1953954.pdf
Data publikacji:
1998
Wydawca:
Politechnika Gdańska
Tematy:
receptor modelling
docking
non covalent interactions
molecular mechanics
molecular dynamics
substituent effects
Opis:
A tentative procedure applied to the search for a new antagonist of neurokinin A (NKA) is presented. In parallel a tentative 3-D model of the NK2 receptor was created, using bacteriorhodopsin (BRD) as a template. The residue substitutions were performed in BRD to obtain the sequence for NK2R_H and the seven a-helical segments were optimized forcing the a-helical backbone to match the corresponding aligned parts of BRD, while the arrangements of the side chains were model built based on available site-directed mutagenesis studies. Constrained MM and molecular dynamics simulations were carried out H-bonding a low energy conformer of the known drugs to residues in the receptor site, allowing both the receptor site and drugs to relax. The Connolly surface for each ligand allowed to determine an "average" binding site in which all the low energy conformers of known and prospective drugs were docked and classified according to a statistical index. The whole procedure was repeated exploiting the lately published structure of an actual G protein coupled receptor as a better template, thus producing a cavity in the binding site to directly dock the drugs. Corollary validations of the force fields used are also mentioned. In addition intra- and intermolecular interactions suitable to produce more active drugs were evaluated.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 1998, 2, 4; 563-581
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pyrite flotation in the presence of galena. Study on galvanic interaction
Autorzy:
Allahkarami, E.
Poor, A. Z.
Rezai, B.
Powiązania:
https://bibliotekanauki.pl/articles/110735.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
flotation
galena
pyrite
galvanic interactions
Opis:
In this investigation, galvanic interaction between galena and pyrite in flotation and its effect on floatability of pyrite were studied. Rest and mixed potential studies in the presence and absence of a collector indicated that pyrite was nobler than galena under all investigated conditions. Therefore, pyrite served as a cathode in galvanic interactions with galena. Floatability of pyrite was performed alone and as a mixture with galena in the ratios of pyrite to galena equal to 1:4, 1:1 and 4:1. The experiments were conducted with air and nitrogen. In any galvanic contact between pyrite and galena, anodic oxidation occurred on the galena surface, and hydrolysed lead species adsorbed on the pyrite surface. The investigation of the various reactions occurring on the sample surface was investigated by ethylene diamine-tetra acetic acid disodium salt (EDTA) extraction and X-ray photoelectron spectroscopy (XPS) measurements. In the presence of nitrogen, floatability of pyrite increased. The recovery of pyrite in the presence of air was 22%, while in the mixture with galena (ratio 1:4) the recovery increased to 43%. The results indicated that the presence of galena improved floatability of pyrite.
Źródło:
Physicochemical Problems of Mineral Processing; 2017, 53, 2; 846-858
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
General equation for directed electromagnetic wave propagation in 1D metamaterial: projecting operator method
Autorzy:
Ampilogov, D.
Leble, S.
Powiązania:
https://bibliotekanauki.pl/articles/1938596.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska
Tematy:
metamaterials
directed waves interactions
Drude dispersion
Kerr nonlinearity
solitary solutions
Opis:
We consider a boundary regime problem for 1D wave propagation in a metamaterial medium with simultaneously negative dielectric permittivity and magnetic permeability. We apply a projecting operator method to the Maxwell system in the time domain that allows the space of the linear propagation problem to be split into subspaces of directed waves for the relations of a given material with general dispersion. After projection, the equations for directed waves have a maximally simplified form, which is most convenient for numerical and analytical integration. Matrix elements of the projectors act as integral operators. For a given nonlinearity and dispersion we derive a general system of interacting right/left waves with combined (hybrid) amplitudes. The result is specified for the Drude metamaterial model for both permittivity and permeability coefficients and the Kerr nonlinearity. We also discuss and investigate singular solitary wave solutions of the system as a limit stationary elliptic system related to some boundary regimes.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2016, 20, 2; 143-155
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fluctuations of kinetic energy at molecular dynamics and the atomic interactions in crystals
Autorzy:
Andriyevsky, B.
Piekarski, J.
Andriyevska, L.
Powiązania:
https://bibliotekanauki.pl/articles/118444.pdf
Data publikacji:
2018
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
interatomic interactions
molecular dynamics
silicon
phonon relaxation time
oddziaływania międzyatomowe
dynamika molekularna
krzem
czas relaksacji fononów
Opis:
The calculation method of the molecular dynamics has been applied to study the correlation of the kinetic energy fluctuations and the relaxation time of the velocity autocorrelation function and the phonon relaxation time in a crystal. On the basis of the molecular dynamics data for silicon crystal obtained at different temperatures in the range 200 K – 1000 K the correlation between the kinetic energy fluctuations and the relaxation time of the velocity autocorrelation function has been calculated with the relatively high coefficient of determination R2 = 0.9396. The correlation obtained and the corresponding approach substantiate a use of the kinetic energy fluctuations for the calculation of values related to the heat conductivity in the silicon based semiconductors (coefficients of thermal conductivity and diffusivity).
Obliczeniowa metoda dynamiki molekularnej została zastosowana do badania korelacji fluktuacji energii kinetycznej i czasu relaksacji autokorelacyjnej funkcji prędkości i czasu relaksacji fononów w krysztale. Na bazie danych dynamiki molekularnej kryształu krzemu otrzymanych w różnych temperaturach w zakresie 200 K – 1000 K została obliczona korelacja fluktuacji energii kinetycznej i czasu relaksacji autokorelacyjnej funkcji prędkości, która cechuje się stosunkowo wysokim współczynnikiem determinacji R2 = 0.9396. Otrzymana korelacja uzasadnia zastosowanie fluktuacji energii kinetycznej do badań obliczeniowych wielkości powiązanych z przewodnością cieplną półprzewodników na bazie krzemu (współczynniki przewodności i dyfuzyjności cieplnej).
Źródło:
Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej; 2018, 12; 19-24
1897-7421
Pojawia się w:
Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza przestrzennego zróżnicowania poziomu rozwoju rolnictwa ekologicznego w gminach województwa łódzkiego
Analysis of Spatial Diversification of Organic Farming Development in the Communes of the Lodzkie Voivodeship
Autorzy:
Antczak, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/656560.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
rolnictwo ekologiczne
gminy województwa łódzkiego
przestrzenno‑czasowa analiza
miernik syntetyczny
zależności przestrzenne
organic farming
gminas of the Lodzkie voivodeship
spatio‑temporal analysis
synthetic measure
spatial interactions
Opis:
The paper analyses the spatial diversification of organic farming development in the gminas of the Lodzkie voivodeship in years 2008–2016. The level of the studied phenomenon was defined by a synthetic measure based on the zero unitarization method. The spatial interactions with using the Moran’s I statistics were also examined. These spatial links may result from natural conditions, range of the agricultural area, subsidies or gminas cooperation. Data was obtained from the Main Inspectorate of Trade Quality of Agricultural and Food Products and the Central Statistical Office. The presented phenomenon was described by 28 sub measurements, which determined the ecological crop cultivation, animal maintenance and eco‑production. Despite the gminas have an enormous potential in organic production, the region is characterised by a large diversity of the phenomenon and the lack of visible trends in the development of this agricultural system. The strengths of the eco‑agriculture of Lodzkie are, e.g. ecological cultivation of fruit trees and shrubs, production of grass, cultivation of feed cereals and plants, cattle breeding for meat and milk, pigs and meat production. The values of the synthetic measure distinguished high potential gminas, e.g. Krzyżanów, Grabów, Wielgomłyny and Nieborów. Finally, the statistically significant spatial relations were also detected. The key units creating in the space a high‑high cluster of the phenomenon were, e.g. Żarnów, Klonowa, Ładzice, Paradyż, Tuszyn and Dalików.
W artykule przedstawiono wyniki analizy przestrzennego zróżnicowania rozwoju rolnictwa ekologicznego w gminach województwa łódzkiego w latach 2008–2016. Poziom badanego zjawiska określono syntetycznym miernikiem rozwoju, skonstruowanym na podstawie metody unitaryzacji zerowanej. Oceniono również występowanie przestrzennych powiązań międzygminnych z użyciem statystyk Morana I. Zależności te mogą wynikać między innymi z uwarunkowań przyrodniczych, zajmowanej powierzchni obszaru rolniczego, dostępu do dotacji, dopłat czy też podejmowanej współpracy międzyregionalnej. Dane do analizy pozyskano z Głównego Inspektoratu Jakości Handlowej Artykułów Rolno‑Spożywczych oraz Głównego Urzędu Statystycznego. Skonstruowano 28 wskaźników cząstkowych opisujących ekologiczną uprawę roślin, utrzymanie zwierząt oraz produkcję. Mimo ogromnego potencjału gmin w produkcji i przetwórstwie ekologicznym w regionie ma miejsce duże zróżnicowanie poziomu zjawiska, brakuje również wyraźnych tendencji w rozwoju tego systemu gospodarowania. Potencjalnymi kierunkami rozwoju są: ekologiczna uprawa drzew i krzewów owocowych, produkcja masy zielonej z pastwisk i łąk, uprawa zboża i roślin na paszę, hodowla bydła na mięso i mleko, trzody chlewnej oraz produkcja mięsa. Na podstawie syntetycznej miary rozwoju wskazano gminy wyróżniające się pod względem poziomu analizowanego zjawiska, między innymi Krzyżanów, Grabów, Wielgomłyny, Nieborów. Analizując poziom zmiennej, wykryto również statystycznie istotne zależności przestrzenne. Kluczowymi jednostkami tworzącymi w przestrzeni klastry wysokich wartości zmiennej były gminy: Żarnów, Klonowa, Ładzice, Paradyż, Tuszyn i Dalików.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2019, 1, 340; 7-26
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Municipal waste in Poland: analysis of the spatial dimensions of determinants using geographically weighted regression
Autorzy:
Antczak, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/623581.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
municipal waste
Polish districts
regional heterogeneity and spatial interactions
socio-economic factors
geographically weighted regression
Opis:
This article provides a quantification of the territorially varied relation between socio-economic factors and the amount of municipal waste in Polish districts. For this purpose, eight causes were identified: revenue budgets, the number and area of uncontrolled dumping sites, population density, the share of working-age population, average gross monthly wages, registrations for permanent residence, and the number of tourists accommodated. The preliminary data analysis indicated that to understand waste generation in Poland at the local level it is necessary to consider regional specificity and spatial interactions. To increase the explained variability of phenomena, and emphasise local differences in the amount of waste, geographically weighted regression was applied.
Źródło:
European Spatial Research and Policy; 2019, 26, 2; 177-197
1231-1952
1896-1525
Pojawia się w:
European Spatial Research and Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of the host genetic variability in the influenza A virus susceptibility
Autorzy:
Arcanjo, Ana
Mazzocco, Giovanni
de Oliveira, Silviene
Plewczynski, Dariusz
Radomski, Jan
Powiązania:
https://bibliotekanauki.pl/articles/1039238.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Influenza A virus
host-pathogen interactions
Opis:
The aftermath of influenza infection is determined by a complex set of host-pathogen interactions, where genomic variability on both viral and host sides influences the final outcome. Although there exists large body of literature describing influenza virus variability, only a very small fraction covers the issue of host variance. The goal of this review is to explore the variability of host genes responsible for host-pathogen interactions, paying particular attention to genes responsible for the presence of sialylated glycans in the host endothelial membrane, mucus, genes used by viral immune escape mechanisms, and genes particularly expressed after vaccination, since they are more likely to have a direct influence on the infection outcome.
Źródło:
Acta Biochimica Polonica; 2014, 61, 3; 403-419
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of loose kernel smut caused by Sporisorium cruentum onrhizomes of Sorghum halepense
Autorzy:
Astiz Gassó, Marta Monica
Lovisolo, Marcelo
Perelló, Analia
Powiązania:
https://bibliotekanauki.pl/articles/961639.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
biocontrol
host-pathogen interactions
johnson grass
kernel smut
smut
systemic diseases
Opis:
Th e eff ect of loose kernel smut fungus Sporisorium cruentum on Sorghum halepense (Johnson grass) was investigated in vitro and in greenhouse experiments. Smut infection induced a decrease in the dry matter of rhizomes and aerial vegetative parts of the plants evaluated. Moreover, the diseased plants showed a lower height than controls. The infection resulted in multiple smutted buds that caused small panicles infected with the fungus. In addition, changes were observed in the structural morphology of the host. Leaf tissue sections showed hyphae degrading chloroplasts and vascular bundles colonized by the fungus. Subsequently, cells collapsed and widespread necrosis was observed as a symptom of the disease. Th e pathogen did not colonize the gynoecium of Sorghum plants until the tassel was fully developed. The sporulation process of the fungus led to a total disintegration of anthers and tissues. When panicles were inspected before emergence, fungal hyphae were observed on floral primord. Histological sections of panicles showed fungal hyphae located in the parenchyma tissue and the nodal area. Infection occurred in the floral primordium before the tassel had fully developed and emerged from the flag leaf. Grains were replaced by sori surrounded by a thin membrane that usually was broken before or after the emergence of the panicle. The results, together with the significant decrease of the dry matter of rhizomes and seeds of S. halepense, suggest that S. cruentum could be considered as a potential biocontrol agent in the integrated management of this weed.
Źródło:
Journal of Plant Protection Research; 2017, 57, 1
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical evaluation of ultrasonic velocities of binary liquid mixtures of 1-bromopropane in chlorobenzene at 303.15, 308.15, 313.15 and 318.15 K
Autorzy:
Babu, Ch. P.
Kumar, G. P.
Nagarjun, B.
Samatha, K.
Powiązania:
https://bibliotekanauki.pl/articles/412079.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ultrasonic velocities
molecular interactions
1-bromopropane and chlorobenzene
Opis:
Theoretical velocities of binary liquid mixtures of 1-bromopropane with chlorobenzene at 2 MHz and four different temperatures 303.15, 308.15, 313.15 and 318.15 K, have been evaluated as a function of concentration and temperature. The experimental values are compared with theoretical models of liquid mixtures such as Nomoto, Van Dael-Vangeel, Impedance Relation, Rao’s Specific Velocity Method, Junjie’s relations and Free Length Theory. In the chosen system there is a good agreement between experimental and theoretical values calculated by Nomoto’s theory. The deviation in the variation of U2exp/ U2imx from unity has also been evaluated for explaining the non ideality in the mixtures. The results are explained in terms of intermolecular interactions occurring in these binary liquid mixtures.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 11, 1; 9-17
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozwojowe współoddziaływanie pokoleń w rodzinie. Rodzice w wieku średnim i dorastające dzieci
Autorzy:
Bakiera, Lucyna
Powiązania:
https://bibliotekanauki.pl/articles/637203.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
circularity, generativity, interactions in family, developmental crisis, Co-influence
Opis:
Developmental co-influence of generation in family. Parents in the middle-age and their adolescent childrenThe main attention in the article is paid to the problem of correspondence between the development of middle-aged adults and their adolescent child. The most important experience is achieved in the family, so the family is called the primary context of human development. Performing parental roles is an activity which is conducive to human development. The variety of changes in adolescence and their peculiarity cause the relationship between parents and adolescents to be problematic, so parents should be very sensitive and candid to children’s problems. They must be flexible as tutors. Activity in the middle-age, which contains different parents’ behaviour, such as being interested in their adolescent children, helping them in their maturation and permission to their growing autonomy bring about a sense of being creative and protect people in this stage of life from the selfish concentration on their own problems. So children could be a chance for a parent’s development, chance of satisfying the need of giving and creating in relation to the younger generation, the need characteristic of this developmental stage. On the other hand adolescents need their parents to grow to be adult, need their emotional and instrumental assistance.Middle-aged parents who lack awareness of the growing teenager's need of developmental changes do not stimulate the child's development and, more importantly, delay the child's and their own personal development. Reciprocal dependence both of the generation in this stage of developmental changes is evident in particular.
Źródło:
Psychologia Rozwojowa; 2008, 13, 1
1895-6297
2084-3879
Pojawia się w:
Psychologia Rozwojowa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of temperature on thermo-physical properties of pyrazolo quinazoline derivatives by ultrasonic studies
Autorzy:
Baluja, Shipra
Ramavat, Paras
Nandha, Kajal
Powiązania:
https://bibliotekanauki.pl/articles/1192659.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
pyrazolo quinazoline derivatives
Acoustical parameter
Molecular interactions
Density
apparent molar compressibility
Opis:
Density (ρ), Sound velocity (U) and viscosity (ɳ) of pure solvent N,N-dimethylformamide (DMF) and solutions of pyrazolo quinazoline derivatives in DMF were taken at different concentration range and at different temperatures by using Antone paar. From these experimental data, some acoustical parameters such as adiabatic compressibility (κs), intermolecular free length (Lf), solvation number (Sn), apparent molar compressibility (fk), apparent molar volume (fv), internal pressure (π) etc., have been determined and correlated with the concentration (C).With concentration and temperatures, Linear or non-linear increases or decreases of acoustical parameters shows the existence of strong molecular interactions between solute and solvent. The results are interpreted in terms of solute-solute and solute-solvent interactions to understand the behavior of synthesized compounds in solutions.
Źródło:
World Scientific News; 2016, 47, 2; 89-111
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lipid-binding proteins as stabilizers of membrane microdomains - possible physiological significance.
Autorzy:
Bandorowicz-Pikuła, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/1044288.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
lipid-protein interactions
lipid-binding proteins
membrane microdomains
Opis:
Below the melting point temperature of lipids, artificial lipid membranes usually exist in the ordered gel phase. Above these temperatures lipid acyl chains become fluid and disordered (liquid-crystalline phase). Depending on the chemical composition of artificial membranes, phase separation may occur, leading to the formation of transient or stable membrane domains. A similar phase separation of lipids into ordered and disordered domains has been observed in natural membranes at physiological temperature range. Moreover, it has been reported that certain proteins prefer certain organization of lipids, as for example glycosylphosphatidylinositol-anchored proteins or Src family of tyrosine kinases. The aim of present review is to discuss the possibility that some lipid microdomains are induced or stabilized by lipid-binding proteins that under certain conditions, for example due to a rise of cytosolic Ca2+ or pH changes, may attach to the membrane surface, inducing clustering of lipid molecules and creation of ordered lipid microdomains. These domains may than attract other cytosolic proteins, either enzymes or regulatory proteins. It is, therefore, postulated that lipid microdomains play important roles within a cell, in signal transduction and enzymatic catalysis, and also in various pathological states, as Alzheimer's disease, anti-phosphatidylserine syndrome, or development of multidrug resistance of cancer cells.
Źródło:
Acta Biochimica Polonica; 2000, 47, 3; 553-564
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Online Temporary Learning Groups in Higher Education – Interactions, Compensation, and Maximisation of Achievements in an Israeli Case Study
Autorzy:
Ben-Shalom, Uzi
Hajaj, Chen
Davidovitch, Nitza
Berger, Corinne
Powiązania:
https://bibliotekanauki.pl/articles/18682886.pdf
Data publikacji:
2023-06-20
Wydawca:
Fundacja Pro Scientia Publica
Tematy:
Temporary Learning Groups
higher education
interactions
compensation
achievements
Social Networking Systems
Opis:
Thesis. This article provides an analysis of online social interactions in two online Temporary Learning Groups (TLG) and their correlates with both pre-admissions scores and academic achievements. Concept. The function of Social Networking Systems (SNS) use on academic achievements is most often indirectly assessed through surveying attitudes of students and teachers. Contrary to this approach, we directly assessed the content on a TLG and paired it with objective admission scores and academic achievements. Results and conclusion. The results reveal that the content of the discussions on the TLGs is practical, immediate, and focuses on the allocation of information required for academic achievements. The users of the TLGs are usually students with lower admission scores and academic achievements. They use these platforms as a compensating mechanism to improve their achievements. In addition, some of the TLG users serve as maximising agents of other students’ achievements. TLGs’ implications for teaching, class-attendance and level of schooling must be recognised by teachers. Originality. While researchers focus on the presence of SNSs in class and its hampering of schooling by multitasking the effect of TLG activity must also be addressed.
Źródło:
Journal of Education Culture and Society; 2023, 14, 1; 619-633
2081-1640
Pojawia się w:
Journal of Education Culture and Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 270

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