Temat: low density - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Assessment of the resistance to external factors of low-density polyethylene modified with natural fillers
Autorzy:: Głogowska, K.
Majewski, Ł.
Gajdoš, I.
Mitaľ, G.
Tematy:: natural filler
low-density polyethylene
injection molding; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/102811.pdf Link otwiera się w nowym oknie
Opis:: The study reports the results of investigation of basic processing and thermal properties of low-density polyethylene modified with two types of natural filler: wheat bran and pumpkin seed hulls, their content ranging from 5% to 15% relative to the matrix. In addition, physical properties of the produced granulates are determined, i.e. the relationship between their density and the applied contents of the tested fillers. Furthermore, the study reports the results concerning longitudinal shrinkage, abrasion resistance and cold water absorption of injection molded tensile specimens.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Recycling of Coal Ash in Production of Low Density Masonry Unit
Autorzy:: Özgül, N.
Savaşçin, M.
Özkan, İ.
Tematy:: coal ash
recycling
low density
masonry unit; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1030101.pdf Link otwiera się w nowym oknie
Opis:: Coal ash is a residue that is created when coal is burned by power plants to produce electricity. Coal ash is one of the largest types of industrial waste and causes environmental pollution. On the other hand, coal ash is potentially a valuable source of minerals, including SiO₂, Al₂O₃, CaO, MgO, Fe₂O₃, Na₂O and K₂O. This study aims to recycle the coal ash in production of low density masonry unit. Coal ash was characterized by chemical and X-ray diffraction analyses. The batches containing different ratios of coal ash and a brick making clay were prepared and shaped by cold pressing. The pressed samples were fired at 1050 and 1100°C. The physical properties such as water absorption, apparent porosity, linear shrinkage, and bulk density were determined. Microstructural observations were performed by using scanning electron microscopy. Based on the technological characteristics; it was observed that low density masonry units can be produced by using coal ash. This study supports the responsible recycling of coal ash by distinguishing beneficial use from disposal.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Kinetic analysis of LDL apoB transport and metabolism in non-steady states
Autorzy:: Weryński, A.
Nahorski, Z.
Angelin, B.
Berglund, L.
Eriksson, M.
Tematy:: biocybernetyka
apheresis
kinetic modelling
low density lipoprotein (LDL); Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Powiązania:: https://bibliotekanauki.pl/articles/206021.pdf Link otwiera się w nowym oknie
Opis:: In this paper a novel kinetic analysis is used for evaluation of the low density lipoprotein (LDL) apoB fractional catabolic rate (FCR) after LDL apheresis which creates a nonsteady state. The formulae for calculation of FCR, and LDL rate of appearance (Ra) as functions of time have been derived. Calculations for one normal and one familial hypercholesterolemic (FH) subjects showed that FCR as well as Ra exhibited variations which can be attributed to the circadian rhythm in LDL metabolism. LDL apheresis had a little impact on both Ra and FCR in normal as well as in FH subjects. However, Ra in FH subject was found to be much higher than - that in the normal subject.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Influence of HNT Nano-Additives on the Hardness of Thermoplastic Composites
Autorzy:: Kiszka, Bogusław
Dulebová, Ľudmila
Martina, Dulebová
Wydawca:: Ústav technológií a manažmentu Strojnícka fakulta – Technická univerzita v Košiciach
Opis:: The European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie
Nanocomposites are a new class of composites that are particle- filled composites in which at least one dimension of the dispersed particles is in the nanometer range. One of the interesting aspects of the use of nanofillers is the low concentration of that filler that needs to be added to the polymer system to obtain desired property improvements. Nanocomposites based on low-density polyethylene (LDPE), containing 2,4 and 6wt% of Halloysite nanotubes (HNT) were used for experiments. The specimens were prepared by injection molding and were tested by Shore hardness test.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 5.

Tytuł:: Influence of HNT Nano - Additives on the Hardness of Thermoplastic Composites
Autorzy:: Kiszka, Bogusław
Dulebová, Ľudmila
Dulebová, Martina
Współwytwórcy:: Dulebová, Martina
Wydawca:: Technical University of Košice
Cytata wydawnicza:: L. Dulebová, B. Kiszka, M. Dulebová, Influence of HNT nano-additives on the hardness of thermoplastic composites, Transfer inovácií. 36, 22-25 (2017).
Opis:: Nanocomposites are a new class of composites that are particle-filled composites in which at least one dimension of the dispersed particles is in the nanometer range. One of the interesting aspects of the use of nanofillers is the low concentration of that filler that needs to be added to the polymer system to obtain desired property improvements. Nanocomposites based on low-density polyethylene (LDPE), containing 2, 4 and 6wt% of Halloysite nanotubes (HNT) were used for experiments. The specimens were prepared by injection molding and were tested by Shore hardness test.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 6.

Tytuł:: The influence of nanofillers on LDPE mechanical properties
Autorzy:: Dulebová, Ludmila
Sikora, Janusz
Kiszka, Bogusław
Greškovič, František
Wydawca:: Politechnika Lubelska
Opis:: Polymer nanocomposite has been known as one of the early success stories of realizing the potential of nanomaterial as reinforcement filler to improve the properties of neat polymers. By adding the nano sized organic compounds, the properties of polymers are improved. Properties of the produced nanocomposites depend on the inorganic materials present in the polymers matrix
European Union
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: Low market density lines for ERTMS regional system
Autorzy:: Białoń, A.
Gradowski, P.
Tematy:: ERTMS
linie o małej gęstości
low density lines; Pokaż więcej
Wydawca:: Polskie Stowarzyszenie Telematyki Transportu
Powiązania:: https://bibliotekanauki.pl/articles/393573.pdf Link otwiera się w nowym oknie
Opis:: The paper presents technical and formal aspects of the development and implementation of the ERTMS Regional. The main purpose of building the ERTMS Regional system is to create an ERTMS-based system which is maximally fitted to low-density lines. This paper presents differences between the specifications of ERTMS and ERTMS Regional systems. The article includes a technical description as well as the principles of ERTMS Regional, a description of the first stage of implementation, as well as an analysis of possible implementation of this system in Poland.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Wybrane aspekty oznaczania gęstości polietylenu małej gęstości
Selected aspects of low-density polyethylene density measurements
Autorzy:: Liszyńska, B.
Zieliński, J.
Marszałek, G.
Kowalska, L.
Kościańczuk, D.
Tematy:: polietylen małej gęstości
polimery termoplastyczne
gęstość
low-density polyethylene
thermoplastic polymers
density; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników
Powiązania:: https://bibliotekanauki.pl/articles/278167.pdf Link otwiera się w nowym oknie
Opis:: Określono wpływ sposobu przygotowania próbek do oznaczeń na wartość gęstości polietylenu malej gęstości oraz podjęto próbę korelacji tych wielkości z wielkościami wyliczonymi na podstawie badań DSC. Przedmiot badań stanowiło osiem gatunków PE-LD. Gęstość oznaczano metodą zanurzeniową stosując próbki przygotowane w dwojaki sposób. Ustalono, że sposób kondycjonowania próbki ma widoczny, ale nieznaczny wpływ na wartość gęstości. Nie uzyskano zadowalającej korelacji pomiędzy wartościami gęstości oznaczonymi metodą zanurzeniową a wyliczonymi na podstawie DSC.
The influence was determined of the preparation of samples for the measurements on the density of low-density polyethylene and an attempt was made to correlate these values with density values calculated basing on DSC studies. The subject of this research were eight types of LDPE. The density was measured using immersion method for samples prepared in two ways. It was determined that the method of sample preparation has an observable but small influence on the measured value of density. No acceptable correlation was found between the values of density measured using the immersion method and the values calculated basing on DSC.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 9.

Tytuł:: The ability of HDL to inhibit VCAM-1 expression and oxidized LDL uptake is impaired in renal patients
Autorzy:: Jurek, Aleksandra
Kubit, Piotr
Turyna, Bohdan
Klein, Andrzej
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Artykuł

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Skocz do pozycji: 10.

Tytuł:: Were the oasis-cities of the southern branch of the Silk Road in Tarim Basin, China, dispersed urban complexes?
Czy miasta południowej odnogi Szlaku Jedwabnego w kotlinie Tarim w Chinach były rozproszonymi zespołami miejskimi?
Autorzy:: Hanus, Kasper
Tematy:: Silk Roads
low-density urbanism
agro-urban landscape
Xinjiang; Pokaż więcej
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Powiązania:: https://bibliotekanauki.pl/articles/27312793.pdf Link otwiera się w nowym oknie
Opis:: This article reinterprets the urban pattern of the oases of southern Tarim Basin, which flourished in the first half of the first millennium C.E. using the dispersed urban complexes framework. Disperse urban centre, also known as a low-density urban complex, is a site that had an urban function, but its morphology was much different from compact cities of, for example, China or mediaeval Europe. Low-density urban complexes, like Tikal in Mesoamerica or Angkor in South-East Asia, despite their distinct urban functions, had the cityscape consisting of intermingled monumental agriculture, water management features and agricultural field. Thus, the oasis-cities of southern Tarim Basin were different from compact urban centres of neighbouring China and western Central Asia and showed some similarities to complexes like Tikal and Angkor. This article evaluates if those sites can be associated with low-density urbanism. Three selected sites, 尼雅 [Niya], 米兰 [Miran] and 樓蘭 [Loulan], have been evaluated for the presence of characteristic associated with low-density urbanism: dispersed monumental architecture, large scale anthropogenic landscapes modifications, and pattern of alternating housing clusters and agricultural fields. This can affect our understating of both the understanding of urbanism in the region and low-density urbanism on the global scale.
Dostawca treści:: Biblioteka Nauki

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