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Tytuł:
Solubility of pyrimidine derivatives in different organic solvents at different temperatures
Autorzy:
Baluja, Shipra
Powiązania:
https://bibliotekanauki.pl/articles/1190176.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
pyrimidine derivatives
Apelblat equation
Buchowski-Ksiazack λh equation
Gibb׳s energy
Opis:
The objective of this study was to measure and correlate the solubility of pyrimidine derivatives in five different solvents namely chloroform, N,N-dimethylformamide, tetrahydrofuran, 1,4-dioxane and ethyl acetate from 298.15 to 328.15 K under atmospheric pressure of 0.1 MPa using gravimetric method. The characterization of all the synthesized compounds was done by IR, NMR and mass spectra. The modified Apelblat and Buchowski-Ksiazczak λh equations were used to correlate the experimental solubility data. Using Van’t Hoff and Gibb’s equations, some thermodynamic parameters such as Gibb’s free energy, enthalpy and entropy of dissolution were evaluated from solubility data. It is found that solubility increases with temperature.
Źródło:
World Scientific News; 2016, 44; 13-34
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examination of Different Heat Exchangers and the Thermal Activities of Different Designs
Autorzy:
Ipek, O.
Kan, M.
Gurel, B.
Powiązania:
https://bibliotekanauki.pl/articles/1031281.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
heat exchangers
compact heat exchanger
micro channel heat exchanger
Opis:
In this study, instead of gasketed or brazed plate heat exchangers, which are used in various fields of application, a direct metal sintering method is used to design a heat exchanger with its original geometry and with different geometries. Studies of heat exchangers found in published literature were reviewed, and the thermal behaviors of the proposed unique designs were examined. Usually heat exchangers using this design do not use channel spacing angles of 30-45-60-75° for the plate ducts. The thermal behaviors of the fluid-circulating systems were analyzed using ANSYS FLUENT software, and they used the boundary conditions found in the literature for this design. Heat transfer between the heat exchanger channels and channel walls was calculated. The analyses results show that an increase in the amount of heat transfer surface area and also an increase in surface roughness increased the amount of positive heat transfer.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 580-584
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnostic accuracy of sonoelastography in different diseases
Wartość diagnostyczna sonoelastografii w różnych jednostkach chorobowych
Autorzy:
Manzoor, Iqra
Bacha, Raham
Gilani, Syed Amir
Powiązania:
https://bibliotekanauki.pl/articles/1033265.pdf
Data publikacji:
2018
Wydawca:
Medical Communications
Tematy:
accuracy
different diseases
sensitivity
sonoelastography
specificity
Opis:
The objective of this study was to evaluate the diagnostic accuracy of sonoelastography in patients of primary and secondary health care settings. Google scholar, PubMed, Medline, Medscape, Wikipedia and NCBI were searched in October 2017 for all original studies and review articles to identify the relevant material. Two reviewers independently selected articles for evaluation of the diagnostic accuracy of sonoelastography in different diseases based on titles and abstracts retrieved by the literature search. The accuracy of sonoelastography in different diseases was used as the index text, while B-mode sonography, micro pure imaging, surgery and histological findings were used as reference texts. Superficial lymph nodes, neck nodules, malignancy in thyroid nodules, benign and malignant cervical lymph nodes, thyroid nodules, prostate carcinoma, benign and malignant breast abnormalities, liver diseases, parotid and salivary gland masses, pancreatic masses, musculoskeletal diseases and renal disorders were target conditions. The data extracted by the two reviewers concerning selected study characteristics and results were presented in tables and figures. In total, 46 studies were found for breast masses, lymph nodes, prostate carcinoma, liver diseases, salivary and parotid gland diseases, pancreatic masses, musculoskeletal diseases and renal diseases, and the overall sensitivity of sonoelastography in diagnosing all these diseases was 83.14% while specificity was 81.41%. This literature review demonstrates that sonoelastography is characterized by high sensitivity and specificity in diagnosing different disorders of the body.
Celem badania była ocena dokładności diagnostycznej sonoelastografii u chorych leczonych w warunkach placówek podstawowej i specjalistycznej opieki zdrowotnej. W październiku 2017 roku dokonano przeglądu baz danych Google Scholar, PubMed, MEDLINE, Medscape, Wikipedia oraz NCBI w celu pozyskania prac oryginalnych i poglądowych, które stanowiły materiał do badania. Prace wybierało dwóch badaczy niezależnie. Oceniono dokładność sonoelastografii w diagnostyce różnych chorób na podstawie tytułów i streszczeń wyszukanych prac. Główny termin stanowiła „skuteczność sonoelastografii w diagnostyce różnych chorób”, a terminy „ultrasonografia w trybie B-mode”, „obrazowanie MicroPure”, „zabieg operacyjny” i „wynik badania histopatologicznego” stosowano jako terminy referencyjne. Badane patologie dotyczyły: powierzchownych węzłów chłonnych, guzków okolicy szyi, złośliwych guzów tarczycy, łagodnych i złośliwych zmian w węzłach chłonnych szyjnych, guzków tarczycy, raka gruczołu krokowego, łagodnych i złośliwych zmian w piersiach, chorób wątroby, zmian w śliniankach przyusznych i gruczołach ślinowych, zmian w trzustce, chorób układu mięśniowo-szkieletowego oraz chorób nerek. Pozyskane przez dwóch badaczy dane dotyczące charakterystyki ocenianych prac oraz wyniki analizy przedstawiają tabele i ryciny. W sumie wyszukano 46 badań dotyczących zmian w piersiach, węzłów chłonnych, raka gruczołu krokowego, chorób wątroby, chorób gruczołów ślinowych i ślinianek przyusznych, zmian w trzustce, chorób układu mięśniowo-szkieletowego i chorób nerek, a ogólna czułość i swoistość sonoelastografii w diagnostyce tych chorób wynosiły odpowiednio 83,14% i 81,41%. Niniejszy przegląd literatury wskazuje na wysoką czułość i swoistość sonoelastografii w diagnostyce różnych chorób. Artykuł w wersji polskojęzycznej jest dostępny na stronie http://jultrason.pl/index.php/issues/volume-18-no-72
Źródło:
Journal of Ultrasonography; 2018, 18, 72; 29-36
2451-070X
Pojawia się w:
Journal of Ultrasonography
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The occurrence of thrips [Thripidae, Thysanoptera] on different cultivars of pea [Pisum sativum L.]
Autorzy:
Wnuk, A
Pobozniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/65222.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thrip
Thysanoptera
pea
different cultivar
occurrence
Thripidae
Pisum sativum
Źródło:
Journal of Plant Protection Research; 2003, 43, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Descriptor fractional discrete-time linear system with two different fractional orders and its solution
Autorzy:
Sajewski, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/201410.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fractional
different order
descriptor
solution
układ nieliniowy
deskryptor
rozwiązanie
systemy liniowe
Opis:
Factional Discrete-time linear systems with fractional different orders are addressed. The Weierstrass-Kronecker decomposition theorem of the regular pencil is extended to the descriptor fractional discrete-time linear system with different fractional orders. Using the extension, method for finding the solution of the state equation is derived. Effectiveness of the method is demonstrated on a numerical example.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 1; 15-20
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Different faces of poverty.
Autorzy:
Malinowski,, Ludwik
Powiązania:
https://bibliotekanauki.pl/articles/952308.pdf
Data publikacji:
2019-09-27
Wydawca:
Akademia Pedagogiki Specjalnej im. Marii Grzegorzewskiej. Wydawnictwo APS
Tematy:
poverty
exclusion
assistance activities
Opis:
Different faces of poverty. Review of the book by S. Golinowska, On Polish Poverty in 1990–2015. Wydawnictwo Naukowe Scholar, Warszawa 2018
Źródło:
Praca Socjalna; 2019, 34(2); 111-120
0860-3480
Pojawia się w:
Praca Socjalna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of bacterial adhesion to metal surfaces with different chemical composition - evaluation of different methods
Autorzy:
Żywicka, A.
Fijałkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/363248.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
bacterial adhesion
metals
direct method
indirect method
Opis:
In the current study attention has been focused on the evaluation of different methods of measurement of bacterial adhesion to the metal surfaces with different chemical composition. The direct methods, which included determination of the number of bacterial cells using fluorescence microscopy and Colony Forming Units (CFU) on agar medium, and indirect methods using Alamar Blue (AB) and MTT assays, were evaluated. The chemical compositions of the metal surfaces included: copper, iron, chromium and nickel. Interaction effects of assay and metal compound have been specifically demonstrated in this study. It was found that metal ions reacted with components of the indirect colorimetric tests used in his study (AB and MTT assay). Consequently, those tests gave positive false results. In contrast to the indirect methods, direct counting methods such as microscopy techniques and CFU counting, were successfully applied for evaluation of bacterial adhesion to the metal surfaces. However, considering the limits for the surfaces of the examined samples for microscopy, the determination of the CFU was found to be the best method for testing the adhesion to metal surfaces. The method, combined with the appropriate detachment procedures allowed for a precise determination of the number of bacteria on the entire surface of the evaluated metal samples.
Źródło:
Environmental Biotechnology; 2017, 13, 2; 14-22
1734-4964
Pojawia się w:
Environmental Biotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of adhesion characteristics of different tyre types in different weather conditions
Autorzy:
Pokorski, J.
Reński, A.
Sar, H.
Powiązania:
https://bibliotekanauki.pl/articles/246790.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
tyre-to-road adhesion
skid resistance tester
traffic safety
accident reconstruction
Opis:
Tyre-to-road adhesion has a great influence on transmitting forces between wheels and road surface and in the consequence on the safety of automobile motion. It plays significant role in vehicle motion modelling, especially for the needs of traffic accidents reconstruction and the development of active safety systems in automobiles. Simultaneously, the knowledge about tyre-to-road adhesion is limited, especially in case of the differences between anti-slip properties of summer and winter tyres. In the paper, method of the measurement of tyre-to-road adhesion coefficient is presented. The measurement system SRT-4 consists of special dynamometer trailer, towing vehicle and test-measuring equipment. It was designed for the needs of road engineering and further developed in the Institute of Vehicles of Warsaw University of Technology. It enables to obtain adhesion characteristics, i.e. graph of adhesion coefficient as a function of wheel slip ratio. In the article, examples of tyre-toroad adhesion characteristics and velocity characteristics of peak adhesion coefficient for different types of tyres (summer, winter) in different weather conditions are presented. Differences in characteristics courses caused by tyre type and weather conditions are discussed. For instance, in case of winter tyres it was noticed that their peak value of adhesion coefficient was reached for higher values of slip ratio than it was observed for summer tyres.
Źródło:
Journal of KONES; 2012, 19, 3; 363-369
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Screening of different leaf extracts of Cassia fistula Linn for investigation of hypolipidemic activity in two different rat models
Autorzy:
Sutar, G.V.
Dass, K.
Einstein, J.W.
Powiązania:
https://bibliotekanauki.pl/articles/11465.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
The present investigation was carried out to evaluate the hypolipidemic activity of methanolic and aqueous leaf extracts of Cassia fistula (CF) Linn (Family: Fabaceae) on atherogenic diet (2% cholesterol, 1% Choline Chloride and 2% Lard) induced Male Sprauge-Dawley rats for the period of 21 days. The rats receiving the treatment with leaf methanol and aqueous extract of CF showed significant (P < 0.001) reduction in total cholesterol (TC), triglycerides (TG), High density lipoprotein (HDL), lipid peroxidation (LPO) and other parameters at dose dependent manner but the effect was less than the standard drug Atorvastatin. The results revealed the effectiveness of CF plant against hyperlipidemic activity.
Źródło:
International Letters of Natural Sciences; 2015, 03
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Different Strokes for Different Folks: Azerbaijans Geopolitical Orientation between the EU and Russia
Autorzy:
KC, Ashik
Powiązania:
https://bibliotekanauki.pl/articles/2091946.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warszawski. Wydział Nauk Politycznych i Studiów Międzynarodowych
Tematy:
International relations
Foreign policy
Negotiations
Geopolitics
Stosunki międzynarodowe
Polityka zagraniczna
Negocjacje
Geopolityka
Opis:
The events in Crimea and eastern Ukraine that took place due to the competition between Russia and the EU over possibilities for close cooperation have reinforced the perception of Russia as a key stakeholder in geopolitical upheavals in the post-Soviet sphere. It also served as a reminder that any settlement to political and territorial conflicts within the post-Soviet sphere would have to include Russia. While all other countries in the Eastern Partnership have since associated themselves with either the EU or Russia, Azerbaijan chooses to remain outside such formal obligations. The EU and Russia both have particular interests in Azerbaijan. Russia's interests in Baku lie primarily in it not becoming an alternative to Russia's energy market and remaining within its sphere of influence. The EU, in turn, wants closer ties with Baku since it considers it an alternative energy market to the unreliable Russia. Considering these competing interests of two different actors, this paper is an attempt to chart Baku's course of action in managing to pursue the 'multi-vector' approach. It manages to pursue this approach by playing off the diverging interests of the EU and Russia and bargaining between them.(original abstract)
Źródło:
Stosunki Międzynarodowe - International Relations; 2016, 52, 4; 265-276
0209-0961
Pojawia się w:
Stosunki Międzynarodowe - International Relations
Dostawca treści:
Biblioteka Nauki
Artykuł

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