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Wyszukujesz frazę "Jaradat, S." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Exposure assessment of bisphenol A by drinking coffee from plastic cups
Autorzy:
Hananeh, W.M.
Al Rukibat, R.
Jaradat, S.
Borhan Al-Zghoul, M.
Powiązania:
https://bibliotekanauki.pl/articles/2087084.pdf
Data publikacji:
2021
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
Arabian coffee
plastic
BPA
public health
Opis:
Background. Human exposure to plastic and Bisphenol-A (BPA) is very wide in food or beverage containers and baby bottles that have contacted polycarbonate and epoxy resin. Currently a traditional beverage in Arabian culture is served in plastic cups instead of glass cups in different occasions Objective. To evaluate the possible BPA leach from the grade 5 drinking coffee plastic cups into the coffee and whether the use of plastic cups instead of glass ones to serve hot Arabian coffee poses a health risk Materials and methods. Oral administration of such coffee to three different groups of rats were undertaken. Each group consisted of 10 males and 10 females. The first group (G1) was gavaged 1.5 ml of hot water in glass cups. The second group (G2) was gavaged 1.5 ml of hot water in plastic cups while the third one (G3) was gavaged 1.5 ml of Arabian coffee in plastic cups. Serum concentrations of Bisphenol-A were measured 4 weeks later. Complete postmortem examination was conducted and representative tissue samples were subjected to histopathological evaluation. Results. In the control group receiving water kept in a glass cup had 24 ± 2 μg/L serum concentration and the second group was 36 ± 4 μg/L while in the third group was 29 ± 6 μg/L. No significant postmortem changes or histopathological findings were present in the studied animals. Conclusions. Bisphenol-A can be leached from food-grade plastic cups into hot drinks within short period of time, posing a significant impact to public health.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2021, 72, 1; 49-53
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Ramsey number for theta graph versus a clique of order three and four
Autorzy:
Bataineh, M.S.A.
Jaradat, M.M.M.
Bateeha, M.S.
Powiązania:
https://bibliotekanauki.pl/articles/30148226.pdf
Data publikacji:
2014-05-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
Ramsey number
independent set
theta graph
complete graph
Opis:
For any two graphs $F_1$ and $F_2$, the graph Ramsey number $r(F_1, F_2)$ is the smallest positive integer $N$ with the property that every graph on at least $N$ vertices contains $F_1$ or its complement contains $F_2$ as a subgraph. In this paper, we consider the Ramsey numbers for theta-complete graphs. We determine $r(θ_n,K_m)$ for m = 2, 3, 4 and n > m. More specifically, we establish that $r(θ_n,K_m) = (n − 1)(m − 1) + 1$ for m = 3, 4 and n > m
Źródło:
Discussiones Mathematicae Graph Theory; 2014, 34, 2; 223-232
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of volcanic tuff on the engineering properties of compressed earth block
Autorzy:
Edris, W. F.
Jaradat, Y.
Al Azzam, A. O.
Al Naji, H. M.
Abuzmero, S. A.
Powiązania:
https://bibliotekanauki.pl/articles/1818488.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
volcanic tuff
lime
interlocking
fibres
compressed earth block
tuf wulkaniczny
wapno
blokowanie
włókna
Opis:
Purpose: of this paper is to investigate the durability and the mechanical properties, including compressive and flexural strengths, of the locally compressed earth blocks manufactured from soil in Irbid, Jordan. Moreover, effect of volcanic tuff as new stabilizer material on properties of compressed earth block (CEB). Compressed earth block is a technique that was created to solve environmental and economic problems in construction sector. It is widespread in many countries around the world but hasn't been used in Jordan yet. Design/methodology/approach: 9 mixtures were carried out. One of this mixture is the control mix, beside other mixtures were performed by replacing soil with 40%, 10%, 10%, of sand, volcanic tuff, and lime respectively. In addition, polypropylene fibre was used. After 28 days of curing, the CEB were dried in oven at 105°C for 24 hours then tested. Findings: Show that absorption and erosion were decreased when the lime used in the soil. On the other hand, the fibres presence significantly improved the durability and mechanical properties in all mixtures. Moreover, the higher compressive strength was obtained in the mixtures which contain lime only while the higher tensile strength was obtained in the mixtures which contain lime with sand replacement. The using of volcanic tuffs produced average compressive strength values. The reason is that in the presence of lime and pozzolana (volcanic tuff) reactions take place at low and slow rate at early ages. Research limitations/implications: volcanic tuff can produce favourable compressive strengths at later ages and this is a point of interest in the future work. Originality/value: Searching for a new material as stabilizer material that improves the properties of the compressed earth block (CEB).
Źródło:
Archives of Materials Science and Engineering; 2020, 106, 1; 5--16
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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