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Medhat M. Hassan,Nagwa A. Badway,Mona Y. Elnaggar,El-Sayed A. Hegazy 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.4
Ground tire rubber (GRT) poses a challenging environmental, economical, and disposal problem in the world because of their crosslinked three-dimensional network structure. Waste rubber from end-of-life passenger car tires was successfully devulcanized by using mechanical–chemical process. The coupling of DR with PP in different proportion was investigated by FTIR, X-ray diffraction and SEM techniques. The mechanical and thermal behaviors of the blends composed of devulcanized rubber (DR) and high crystalline polypropylene (PP) in different proportions were studied. Evaluation of the mechanical and thermal properties of the developed blends, unirradiated and gamma irradiated, was carried out using tensile strength (Ts), elongation at break (Eb), hardness, TGA and DSC measurements.
EL-Taher Eman M. M.,El-Sherei Moshera M.,El Dine Riham Salah,ElNaggar Dina M.Y.,Khalil Wagdy K. B.,Kassem Salwa M.,Elkhateeb Ahmed,Kassem Mona E. S. 경희대학교 융합한의과학연구소 2022 Oriental Pharmacy and Experimental Medicine Vol.22 No.1
From the phenolic profile of Acacia pennata L. leaves hydromethanolic extract, nine flavonoids were tentatively character- ized (liquid chromatography-electrospray ionization mass spectrometry), of which Kaempferol 3,7-di-O-hexoside, Apigenin 6,8-di-C-hexoside, Luteolin-6-C-pentoside-8-C-hexoside, Apigenin-6-C-hexoside-8-C-pentoside and Apigenin-6-C-pento- side-8-C-hexoside were detected for the first time from the plant. Three doses of the plant extract (12.5, 25 and 50 mg/kg bw/d, four weeks treatment) were used to assess its protective effect against acetominophen induced genotoxicity in hepatic cells of male rats (2 g/kg bw twice per week). A. pennata extract and Acetominophen treated animal groups attenuated DNA damage rates (Comet assay) by 5.6, 6.2 and 6.4% for the three doses, respectively, compared with the acetaminophen treated and untreated groups by 21.2% and 5.8%, respectively. It also decreased DNA fragmentation, significantly down-regulate the expression of p53 tumour suppressor gene and mdr1b multidrug resistance gene [real-time PCR (qPCR)] and ROS genera- tion rates induced by Acetaminophen by 715.4, 453.8 and 376.9% in rats in a dose dependant effect. The results highlighted the DNA protection potential of A. pennata phytoconstituents from drug abuse harmful effects.