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Wyszukujesz frazę "Abdelgawad, Ahmed" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Chemical Composition, Cytotoxic and Antioxidant Activities of Celosia trigyna L. Grown in Saudi Arabia
Autorzy:
El-Desouky, Samy
Abdelgawad, Ahmed
El-Hagrassi, Ali
Hawas, Usama
Kim, Young-Kyoon
Powiązania:
https://bibliotekanauki.pl/articles/895232.pdf
Data publikacji:
2019-08-30
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
GC-MS
antioxidant activity
cytotoxic activity
Celosia trigyna
flavonoid-glycosides
Opis:
The methanol extract of the aerial parts of Celosia trigyna (Amaranthaceae) was successively fractionated using n-hexane, dichloromethane, ethyl acetate and n-butanol. The cytotoxic activity of the obtained fractions was investigated using sulphorhodamine-B (SRB) assay against three carcinoma cell lines; breast adenocarcinoma (MCF-7), colorectal carcinoma (HCT-116) and hepatocellular carcinoma cells (HepG2). The dichloromethane fraction showed significant in vitro cytotoxic activities against the human cancer cell lines HCT-116 and HEP-G2 with IC50 values of 10.9 and 11.2 µg/mL, respectively, while all fractions revealed weak antioxidant activity using DPPH free radical scavenging method. The GC-MS analysis of the most cytotoxic dichloromethane fraction has resulted in the identification of 12 compounds. The main constituents were tetrahydroisoquinoline derivative (31.44%), 2,3-dimethylheptadecane (16.71%) and 3-octadecanone (15.56%). Moreover, the phytochemical study of the dichloromethane and n-butanol fractions led to the isolation and identification of five known compounds identified as β-amyrin acetate (1), acacetin 8-C-α-rhamnosyl-(1→2)-β-glucopyranoside (2), apigenin 8-C-α-rhamnosyl-(1→2)-β-glucopyranoside (3), quercetin 3-O-α-rhamnosyl-(1→6)-β-glucopyranoside (4) and 3-hydroxyglutaric acid (5).
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 4; 691-699
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of ventilation to limit airborne infection concentration in an isolation room
Autorzy:
Kassem, Fatma A.-M.
Abdelgawad, Ahmed Farouk
Abu El-Ezz, A. E.
Nassief, Mofreh M.
Adel, Mohamed
Powiązania:
https://bibliotekanauki.pl/articles/24201035.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
COVID-19
ventilation
exhaled air
air exchange
test model
hospital room
CO2
wentylacja
powietrze wydychane
sala szpitalna
wymiana powietrza
model badawczy
Opis:
Coronavirus (COVID-19) was detected at the end of 2019 and has since caused a worldwide pandemic. This virus is transferred airborne. In this study, an investigation was carried out of the ventilation strategies inside the isolation room based on exhaust air locations. To reduce the infection disease (COVID-19), due to the spreading of exhaled contaminants by humans in interior environments, five models for ventilation systems differing in the position of the outlet and inlet were used. This study aims to increase knowledge regarding the exhaled contaminant distribution under different environ-mental conditions (opening exhaust and negative pressure). The results showed a good agreement be-tween the computational results and the experimental data. Tracer gas CO2 was used to evaluate the air quality experimentally and computationally. The results showed that stable conditions are obtained inside the room at a negative pressure value above –1.5 Pa. The residence time of the infected airborne decreases when the pressure difference increases. The study revealed that the model with an air outlet opening installed behind the patient enabled avoiding the spread of infection in the room.
Źródło:
Environment Protection Engineering; 2023, 49, 2; 39--54
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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