research centers


Search results: Found 17

Listing 1 - 10 of 17 << page
of 2
>>
Sort by

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

Loading...
Loading...
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 Compaction Pressure in the Fresh State on The Resistance of Concreteʹs Compression and Tension
تأثير ضغط الرص في الحالة الطرية على مقاومة الإنضغاط والشد للخرسانة

Authors: Samer Sami Majeed سامر سامي مجيد --- Rafal Naheth Wadie رفل ناهض وديع
Journal: AL Rafdain Engineering Journal مجلة هندسة الرافدين ISSN: 18130526 Year: 2012 Volume: 20 Issue: 4 Pages: 30-37
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

AbstractThis present research presents an experimental study on the behavior of the compacted concrete filled in cylindrical steel molds with dimensions of (100 mm Diameter and 200 mm Length). In this study, different compaction pressure values have been used to compact concrete mixtures, which differ in water to cement rates using electronic compression machine. Then, compression and tension strength of a concrete at the age of (28) days, under compaction pressure in its fresh state, compared with the compression and tension values of a concrete, of the same mixing rates, unexposed to pressure, in order to study the effect of compaction pressure on the concrete in its fresh state, on the compression and tension values of the solid concrete. (90) Specimens under the impact of the stresses of compression and tension at the age of (28) days have been tested and the effect of water to cement rates and the compaction pressure on the maximum resistance of the columns have been tested. The results showed, that the compaction stresses of the concrete, affect the ultimate capacity of the columns, where they increase the compression and tension resistance of the concrete at a certain limited value of subjected compaction pressure value in the fresh state, and that the mixture with (w/c = 0.45) requires the minimum value of compact pressure to produce the maximum value of concrete resistance, while the mixtures with (w/c = 0.50) and (w/c = 0.55) require higher values of compact pressure, in order to introduce higher values of concrete resistance.

الملخصالبحث الحالي يعرض الدراسة العملية لسلوك الخرسانة المضغوطة المملوءة بقوالب اسطوانية حديدية بقياس (010 ملم القطر- 020 ملم الطول). تم في هذا البحث تسليط ضغط رص بقيم مختلفة على عدة مزجات خرسانية تختلف فيما بينها بنسبة الماء إلى السمنت بواسطة جهاز ضغط الكتروني ثم مقارنة قيم الإنضغاط والشد للخرسانة بعمر (28) يوم والتي كانت معرضة لضغط رص في الحالة الطرية مع قيم الإنضغاط والشد لخرسانة بنفس نسب المزج غير معرضة للضغط لدراسة تأثير ضغط الرص على الخرسانة في الحالة الطرية على قيم الإنضغاط والشد للخرسانة المتصلبة .. تم فحص (90) نموذج تحت تأثير إجهادات الإنضغاٍط والشد وبعمر (28) يوما ً. تم دراسة تأثير نسبة الماء إلى السمنت وضغط الرص على المقاومة القصوى للأعمدة. أظهرت النتائج بأن إجهادات الرص للخرسانة تؤثر على المقاومة القصوى للأعمدة حيث تؤدي إلى زيادة مقاومة الشد والإنضغاط للخرسانة عند حد معين من قيمة ضغط الرص المسلط في الحالة الطرية وإن الخلطة ذات نسبة ماء إلى سمنت (0.45) تحتاج إلى أقل قيمة لضغط الرص لتعطي أعلى قيمة لمقاومة الخرسانة، في حين أن الخلطات الأخرى ذات نسبة ماء إلى سمنت (0.5 ، 0.55 ) تحتاج إلى قيم أعلى لضغط الرص لتعطي قيم عليا لمقاومة الخرسانة.


Article
Usage 1 And 1.5 g Of Ozone At Different Times On Growth Inhibition Of Conidia Spore And Vegetative Cells Of Aspergillus And Pencillium
دراسة تأثير استعمال الاوزون في تثبيط نمو العفن Aspergillus والعفن Penicillium

Loading...
Loading...
Abstract

A study was conducted to determine the effectiveness of ozone and its impact on growth inhibition molds Aspergillus and Penicillium and determine the dose and time optimization to get this effect. The results showed that the use of ozone gas dose 1 g for 60 minutes was enough to inhibit the growth of Conidia spore of the fungus Aspergillus and Pencillium suspended in distilled water sterilized and the conidia spore of penicillium suspended in whey by 100%, while requests use the same dose of ozone increase the exposure time to 90 minutes to get the same percentage of inhibition 100 % for the growth of spores Conidia of the fungus Aspergillus suspended in whey while requests exposing Conidia spores fungus Pencillium suspended in whey to 60 minutes to get the same percentage of inhibition and this is due to the role of wheyproteins and other materials in providing protection of Conidia spore, while the use of ozone gas At a dose 1.5 g for 60 minutes was enough to inhibit growth Conidia spores of Aspergillus and Pencillium suspended in distilled water as well as the case of the spores pending Conidia in whey.

إجريت دراسة للوقوف على فعالية الاوزون وتأثيره في تثبيط نمو الاعفان Aspergillus و Penicillium وتحديد الجرعة والوقت الامثل للحصول على هذا التاثير, أظهرت النتائج ان استعمال الاوزون وبجرعة قدرها 1 غم ومدة تعريض امدها 60 دقيقة قد أحدث فعلاً تثبيطياً وبما يساوي 100% لكل من الابواغ الكونيدية المعلقة في الماء المقطر المعقم والنمو الخضري لهذين الجنسين من الاعفان, وكان الامر كذلك فيما يتعلق بنسبة التثبيط لابواغ العفن Penicillium المعلقة في الشرش في حين تطلب في حالة العفن Aspergillus زيادة وقت التعريض ليبلغ 90 دقيقة لتحقيق نسبة التثبيط ذاتها 100% وهذا مرده لدور بروتينات الشرش والمواد الاخرى التي يحتويها الشرش في توفير حماية للابواغ الكونيدية.أدت زيادة الجرعة من الاوزون وبما يساوي 1.5 غم ولمدة تعريض قدرها 60 دقيقة الى الحصول على نسبة تثبيط قدراها 100% للابواغ الكونيدية لكلا النوعين Aspergillus و Penicillium والمعلقة في الماء المقطر والشرش.


Article
The Effect of Mold Rotational Speed on Mechanical Properties of Functionally Graded Polymeric Matrix Composites
تأثير سرعة دوران القالب في الخواص الميكانيكية لمواد متراكبة بوليميرية متدرجة وظيفياً

Authors: Ahmed Akram Abdullah أحمد أكرم عبد الله --- Awad Hallosh Khidhir عواد هلوش خضر
Journal: AL Rafdain Engineering Journal مجلة هندسة الرافدين ISSN: 18130526 Year: 2015 Volume: 23 Issue: 2 Pages: 1-12
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

In this research, a functionally graded polymeric matrix composites (FGPMCs) were produced using centrifugal casting method. These composites were fabricated from unsaturated polyester resin as a matrix and reinforced with silicon carbide particles (SiCp) of (106µm) and (6%)bulk volume fraction, using different mold rotational speeds(400,500,600 R.P.M) at room temperature (22Cº).Additional (3) samples of pure polyester were manufactured at the same conditions for comparison purpose .The aim of the present research was to study the effect of mold rotational speed on local values of volume fraction,hardness and Young modulus at specific points along the graded samples. Hardness was measured at these points then graded samples were cut to eight portions .Densityand volume fraction were evaluated,then standard homogenoussamples of constant but different volume fraction were manufactured. Results shows that local values of volume fraction, hardness and Young Modulus decreased in nearby positions of the center of rotation and increased in positions far away from the center of rotation with increasing mold rotational speed.

تم في هذا البحث انتاج مواد متراكبة بوليميرية متدرجة وظيفياً(FGPCs) مادتها الاساس من البولي استر غير المشبع(Unsaturated Polyester Resin) ومعززة بدقائق من كربيد السليكون(SiCp) بكسر حجمي كلي (%6) وحجم حبيبي(106µm) ومصنعة بطريقة الطرد المركزي وبسرعة دورانية مختلفة (400,500,600R.P.M) وبدرجة حرارة الغرفة(22Cº) فضلا عن انتاج ثلاثة نماذج من البولي استر النقي وبالظروف نفسها لغرض المقارنة. تم دراسة تأثير تغير سرعة دوران القالب في القيم الموضعية للكسر الحجمي والصلادة ومعامل المرونة للنماذج المصنعة وفي نقاط محددة على طول كل أنموذج متدرج .تم قياس الصلادة في هذه النقاط ومن ثم تقطيع كل انموذج متدرج الى ثمانية قطع وحساب كثافتها وتحديد كسرها الحجمي وانتاج نماذج متجانسة قياسية ذات مواصفات مناظرة لتلك الخصائص لغرض اختبار الشد .اظهرت نتائج البحث انخفاض القيم الموضعيةللكسرالحجمي والصلادة ومعامل المرونة في المواضع القريبة من مركز دوران القالب وارتفاع هذه القيم في المواضع البعيدة عن مركز دوران قالب الطرد المركزيمع زيادة سرعة دوران القالب.


Article
MEASURES OF SPECIFIC PRODUCTIVITY, ACTUAL TIME, APPEARANCE AND TILLAGE DEVIATION FOR TWO PLOWS MOSTLY USED IN IRAQ

Author: Ahmed Abd Ali Hamid Al-Mafrachi
Journal: Euphrates Journal of Agriculture Science مجلة الفرات للعلوم الزراعية ISSN: 38752072 Year: 2015 Volume: 7 Issue: 4 ملحق Pages: 402-414
Publisher: Al-kasim University جامعة القاسم الخضراء

Loading...
Loading...
Abstract

Experiment was conducted in Baghdad. Three factor were used in this research included Twotypes of Plows included moldboard and disk plows which represented the main plot, Three forwardspeeds of the tillage was the second factor included 1.85, 3.75 and 5.62 km / h which represented supplot , and Three levels of Soil Moisture was third factor included 21, 18 and 14 % in all of Vertical andLateral Plowing Deviation, Practical and specific productivity, actual time for plowing one donam andappearance (goodness) of Tillage represented by the number of clods > 10 cm in silt clay loam soilwith depth 22 cm were studied. the experiment was used Split – split plot design under randomizedcomplete block design with three replications and Least Significant Design 5 % was used to comparethe means of treatments . Mold-board plow recorded the best Practical and specific productivity forplowing which was 1.247 donam/ hr and 2379 m / hr, and lower actual time for plowing one donam0.972 hr and Appearance Tillage number of clods > 10 cm was 9.555 clods/m2 , Disc Plow recordedthe least Vertical and Lateral Deviation for Plowing which was 2.325% and 2.357% . Tillage Speed5.62 km/hr recorded higher Practical and specific productivity 1.672 donam/hr and 3452 m/hrrespectively and lower actual time 0.608 hr and number of clods > 10 cm was 8.166 clods/m2, Speed1.85 km/hr recorded lower Vertical and Lateral Deviation Plowing 1.221% and 1.068% respectively.Soil Moisture 18 % recorded higher Practical and specific productivity 1.168 donam /hr and 2400 m/hr respectively, lower actual time 1.047 hr and lower number of clods > 10 cm was 9.500 clods/m2.Soil Moisture 21% recorded lower Vertical and Lateral Deviation for Plowing 1.978% and 1.901%respectively. All Interactions among treatments had significant effect on the parameters studded underthis experiment.


Article
The effect of glycerin-painted wax pattern on surface quality of dental stone mold

Author: Dr. Arshad F. Jassem Al-Kaabi. * د. ارشد فيصل جاسم
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2016 Volume: 13 Issue: 1 Pages: 52-56
Publisher: Al-Mustansyriah University الجامعة المستنصرية

Loading...
Loading...
Abstract

Aim: The aim of this study was to examine the effects of glycerin-coated wax patternon dental stone surface quality in terms of surface roughness and micro airbubble formation.Method: In this study, a total of 20 modeling wax samples were used for thehydrophilicity test (the contact angle test) divided into 2 groups (control andglycerin-painted). A total of 20 dental stone samples were also prepared forvisual and microscopic analysis divided into 2 groups (control and glycerinpainted).Results and conclusion: The contact angle data showed a significant decrease insurface hydrophilicity for the glycerin-painted group (P-value < 0.05). However,the visual and microscopical analysis did not show a prominent distinction insurface quality between the two groups, so there is no noticeable effect on dentalstone surface caused by glycerin-modified wax pattern.


Article
Efficacy of Filter Water with Nanosilver-coated Natural Zeolite in Controlling Water Molds Infection on Bunnei (Barbus Sharpeyi )Eggs

Author: Rana H. Shammari
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 4 Part (B) Scientific Pages: 479-489
Publisher: University of Technology الجامعة التكنولوجية

Loading...
Loading...
Abstract

The effect of indirect use of nanosilver particles (AgNPs) was studied for control water molds infection on Bunne eggs during incubation period in the hatchery. This effect was studded with different concentrations of nanosilver-coated natural zeolite (0.5,1and 2 % AgNPs) and these concentrations were compared with unmodified natural zeolite as water filter in semi-circulatory incubation system. All incubators were inoculated with water molds-infected Bunne eggs for testing the effect of AgNPs on inhibition of fungal infection. Dead and infected eggs were removed periodically ,the efficacy of the filters was assessed by estimation the survival rates from fertilization to accomplishment of the yolk-sac absorption stage. Survival rate was increased about 5.3% (filters with 0.5% AgNPs) from fertilization to larvae compared to control (P<0.05).The additional option of active carbon (absorbent media) along with AgNP-coated zeolite filters caused an increase of about 13.5% in the survival rate for the larval stage (P<0.05).No infection with water mold were observed in the incubators during the incubation period in the incubators with water supply from filters with AgNP-coated zeolite in contrast to the control group with about 12% water mold infection. The end results enhanced that the indirect usage of AgNPs in the aforementioned filters were significantly effective for control water mold infections on semi-circulation system for incubation of Bunne’s eggs, making them a candidate for exchange the chemical reagents currently used in eggs incubation in hatchery system. The indirect use of nanosilver materials for the disinfection of water for eggs incubation was applied for the first time in fish hatchery in Iraq.


Article
Detaction of gray mold disease in some Iraqi governorates, its pathogen identification and test of pathogenicity in laboratory
التحري عن مرض العفن الرمادي في بعض محافظات القطر وتشخيص مسببة واختبار أمراضية بعض عزلاته مختبريا

Authors: Theyab Abd Al-Wahed Al-Esawee ذياب عبد الواحد فرحان العيساوي --- Ali Kareem Mohammed AL-Taae علي كريم محمد الطائي
Journal: ANBAR JOURNAL OF AGRICULTURAL SCIENCES مجلة الأنبار للعلوم الزراعية ISSN: PISSN: 19927479 / EISSN: 26176211 Year: 2016 Volume: 14 Issue: 2 Pages: 271-278
Publisher: University of Anbar جامعة الانبار

Loading...
Loading...
Abstract

The field survey results indicated to gray mold disease caused by Botrytis spp fungus on different vegetable crops under green house agriculture in different regions of Iraqi governorates (Baghdad, Anbar, Babil and Salah Eldin), that the disease is prevalent in all surveyed regions with incidence ranged from 10-43%. In addition, Isolation and diagnostic results showed that the fungus Botrytis spp was associated for all samples collected when conducting field surveys. Estimated tests indicated pathogenicity on seeds of cauliflower that all isolates fungus Botrytis spp achieved a noticeable reduction of seed germination of cauliflower rate ranging between 41 – 68% compared with control treatment ,which has the rate of germination in 86%.Some tests revealed that the isolates fungus Botrytis spp on different vegetable crops leaves plant’s on PDA that fungus isolates varied in the % infection zone between 16 – 51% compared with the control treatment with of % infection zone was 0%.

أوضحت نتائج المسح الحقلي لمرض العفن الرمادي المتسبب عن الفطر Botrytis spp على محاصيل الخضر المختلفة تحت ظروف الزراعة المحمية في مناطق مختلفة من محافظات العراق (بغداد، الأنبار، بابل وصلاح الدين) أن المرض منتشر في كافة المناطق التي شملها المسح إذ تراوحت نسبة الإصابة ما بين 10 – 43 %. و أشارت نتائج العزل والتشخيص إن الفطر Botrytis spp مرافقاً لكافة العينات التي جُمعت عند إجراء المسح الحقلي. وبينت اختبارات المقدرة الإمراضية على بذور القرنابيط بإن عزلات الفطر Botrytis spp كافة حققت خفضاً معنوياً في إنبات بذور القرنابيط إذ تراوحت نسبة الإنبات بين 41 – 68 % مقارنة مع معاملة المقارنة والتي بلغت نسبة الإنبات فيها 86% .وبينت اختبارات بعض عزلات الفطر Botrytis spp على أوراق محاصيل خضر مختلفة على الوسط الزرعي PDA إن عزلات الفطر وأوراق محاصيل خضر مختلفة والتداخل بينهما تباينت في % لمنطقة الإصابة إذ تراوحت نسبة المنطقة المصابة بين 16 – 51 % مقارنة مع معاملة المقارنة والتي بلغت نسبة المنطقة المصابة صفر % .


Article
Experimental Study of Mechanical Properties of Type Linear Low Density Polyethylene and Mold Design

Authors: Samir A. Amin --- Ali Y. Hassan
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 5 Part (A) Engineering Pages: 493-499
Publisher: University of Technology الجامعة التكنولوجية

Loading...
Loading...
Abstract

In general, the manufacture of plastic materials is commonly in the world due to their applications. Plastic is light weight, cheap, and able to be used in different industries, for example parts of automotive and home tools. This research represents a challenge on how to design and manufacture a changeable mold. First, a mold was designed by the Auto CAD program and then manufactured in the workshop. The mold consists of three parts, the middle part has changeable cavity. The mold was cooled by worm net pipes embedded into the third part. All specimens were manufacture in this mold. The injection plastic flow is perpendicular on mold. The goals of this research are to design and manufacture a mold and to determine the mechanical properties of linear low density polyethylene. Three types of test were executed, tensile, impact and bending. The results of tensile test showed that the tensile strength value is 15 MPa, Young’s modulus is 0.18 GPa, yield stress is 12 MPa, and Elongation to break is 70.88 mm. From impact test, the impact strength is about 193.75 KJ/m2, while in bending test, the flexural strength is about 18 N/mm2 and the shear stress is 1.5 N /mm2.


Article
Unpublished Terracotta Plaques from Iraq Museum
(( ألواح فخارية غير منشورة من المتحف العراقي ))

Authors: Adil Shakir Waham عادل شاكر وهام --- Qusay Subhi Abbas قصي صبحي عباس
Journal: Al-Adab Journal مجلة الآداب ISSN: 1994473X Year: 2019 Volume: 1 Issue: 128 extension Pages: 109-120
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

We can get the good collection from ( a Confiscated Terracotta Plaques from Iraq Museum ) . After we examination all these pieces , we can choose a numbers of these Terracotta Plaques, which studied in this research , also contain an empirical study for all details in this motives , and drawing for all figures , also I put the list for its shapes , and its Iraqi numbers , with its measurements , with its colours , and its conditions , as I can , we try to do a comparative study for these pieces in artistic way , also to determine the period to which its belong , and the study was adopted ( the Archaeological and artistic way to described and analysis ) .We reach to the final conclusion of these Terracotta Plaques, which refer to ( Terracotta Plaques Goddess )

تهيأت لنا الفرصة للحصول على مجموعة جيدة من ( القطع المصادرة من ألواح فخارية من المتحف العراقي ) , وبعد أجراء الفحص والتدقيق بعناية تم إختيار عدد من هذه الألواح الفخارية لتكون مادة البحث المقدم , وقد شمل البحث دراسة تطبيقية لجميع التفاصيل الخاصة بهذه الألواح من تصوير , ورسم أشكال الألواح التوضيحية , وكذلك الجداول الخاصة بأشكالها , وأرقامها المتحفية , فضلاً عن قياساتها وألوانها وحالتها , وبما أن أي دراسة تحتاج الى إجراء مقارنة لهذه القطع الفنية من أجل التحقق والوقوف على المزيا التقنية والفنية , ونسبة هذه القطع الى الدور الحضاري الذي تعود إليه , فقد اعتمدت الدراسة لهذه الألواح ( الطريقة الآثارية الفنية الوصفية والتحليلية ) , أما موضوع – Subject ومضمون- Content الألواح المختارة فهو ( ألواح الإلهات الفخارية ) .

Listing 1 - 10 of 17 << page
of 2
>>
Sort by
Narrow your search

Resource type

article (17)


Language

Arabic (7)

English (7)

Arabic and English (1)


Year
From To Submit

2019 (2)

2018 (2)

2016 (5)

2015 (3)

2014 (1)

More...