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Article
Detection the Antifungal Effect of Zirconium Oxide Nanoparticles on Mold which Isolated from Domestic's

Author: Dina Y. Mohammed
Journal: Al-Mustansiriyah Journal of Science مجلة علوم المستنصرية ISSN: 1814635X Year: 2018 Volume: 29 Issue: 1 Pages: 15-22
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The aim of this study is to detection the antifungal effect of Zirconium oxide nanoparticles on mold which isolated from domestic's bathroom during April 2017 in Baghdad City. Twenty species were isolated from one hundred samples which were Aspergillus niger, Aspergillus. flavus,, Aspergillus duricaulis, Aspergillus nidulans Aspergillus. parasiticus, Aspergillus fumigatus, Aspergillus. brasiliensis, Aspergillus heteromorphus, Curvularia lunata, Penicillium sp., Fusarium oxysporum,, Alternaria alternate, Cladosporium sp. Trichoderma sp., Mucor, Rhizopus sp., Rhodotorula mucilaginosa,, Stachybotrys and yeast. Among the isolated species Aspergillus niger, was the most abundant (14.92%) frequency, followed by Aspergillus flavus (10.14%), while less abundant (0.95 & 0.63 %) Cladosporium sp. &, Mucor respectively. The higher inhibition zone of fungal growth was recorded at 8mg/ml concentration of Zirconium oxide nanoparticles which was (3.8cm) in molds Aspergillus niger, Aspergillus. flavus,, & Aspergillus. brasiliensis.

هذفج انذراست انحبن تٍ انخحزي ع فعبن تٍ انخضبد تٌ نذقبئق انزركى ىٍَو ان بُ ىَ تٌ ضذ الاعفب ان عًزونت ي انح بًيبث ان زًُن تٍ,ح ثٍ حى عزل وحشخصٍ الاعفب ي انح بًيبث ان زًُن تٍ ن ذً تٌُ بغذاد خلال شهز سٍَب 2017 .حى عزل عشزو ىَع ي الاعفب ي يئت يسحت وهى Aspergillus niger و Aspergillus. flavus و Aspergillus. duricaulis وAspergillus. nidulans و Aspergillus. parasiticus و Aspergillus. fumigatus و Aspergillus. brasiliensis و Aspergillus. heteromorphus و Curvularia lunata و Penicillium sp و Fusarium oxysporum و Alternaria sp., و Cladosporium sp و Trichoderma sp و Mucor sp., و Rhizopus sp وmucilaginosa, و Stachybotrys وانخ بًئز . وي ب هذة انعزلاث , أظهزث ان خُبئج أ اعهى سَبت حكزار نلاعفب كب جَ نهفطز A.niger بهغج ) 14.92 %( حبعهب انفطز Aspergillus. flavus ب سُبت ) 10,14 %( ف ح كب جَ اقم سَبتحىاجذ نهفطز بٌث هى Cladosporium sp و Mucor sp., ح ثٍ بهغج سَبت حىاجذه بً 0,95 % و 0,63 % عهىانخىان (ً. وقذ بهغج اعهى سَبت حثب طٍ نذقبئق انزركى ىٍَو ان بُ ىَ تٌ ضذ الاعفب ان عًزونت ع ذُ حزك زٍ 8 يهغى / يم ح ثٍ بهغجقطز انخثب طٍ) 3,8 سى( ع ذُ انفطز بٌث Aspergillus niger و Aspergillus. flavus و s A. brasiliens .


Article
Effect of Dispersion Method for Nano-Materials on Some Mechanical Properties of Cement Mortar

Authors: Hamza M. Kamal --- Mohammed J. Kadhim
Journal: DIYALA JOURNAL OF ENGINEERING SCIENCES مجلة ديالى للعلوم الهندسية ISSN: 19998716/26166909 Year: 2019 Volume: 12 Issue: 4 Pages: 9-32
Publisher: Diyala University جامعة ديالى

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Abstract

This study was involving the dispersion method ofnano-materials replacement and the interaction withcement mortar behavior for many mortar samples undervariable curing time ,with constant water to cement ratio(W/C=0.45) .Some mechanical properties such as(compressive, flexural strength and hardness tests) wasstudied. The main parameters are depending on the smallamount replacement ratio of nano-particle (ZrO2) withrespect to the mass of the cement (OPC) type (I). Theaddition of nano-material by replacement on the mixture ofmortar includes (1, 2, 3,4and 5%) with constant W/C ratioand also the amount of the fine aggregate use is 2.75 fromthe amount of cement. The results show that, the strengthof the mortar that consist from colloidal nano materialsgive better properties than from both mortar with dry nanomaterials replacement and without nano-materials in alltest, But the nano-Zirconia materials give good propertiesup to 2% in all tests compared with control cement mortar.

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