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Article
Antimicrobial effect of propolis on Streptococcus mutans

Author: Ghada Y ABDUL-RAHMAN
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2002 Volume: 2 Issue: 3 Pages: 299-303
Publisher: Mosul University جامعة الموصل

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Abstract

We choose two types of propolis extracts; watery and ethanolic; to estimate their activity against the most cariogenic microorganism; Streptococcus mutans, and evaluate this activity in vitro compared with chlorohexidine and tetracycline as negative controls, using the turbidity method, Both watery extract of propolis - WEP and ethanolic extract of propolis - EEP - show good inhibitory effect with significant variance compared with chlorohexidine, which also had better effect than tetracycline against Streptococcus mutans. The WEP at (1%) was the best antimicrobial solution in this study.


Article
The effect of incorporation of prepared Ag-Zn Zeolite on some properties of heat polymerized acrylic denture base materials

Authors: Zainab A. Azeez --- Nabeel A.Fatah
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2015 Volume: 27 Issue: 1 Pages: 63-69
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Poly (methylmethacrylate) is the most widely used material in denture fabrication. The characteristics ofacrylic resin which support microorganism development can threaten the oral health of denture users. This study wasassigned to prepareand incorporate Ag-Zn zeolite powder into heat cured denture base material as antimicrobialmaterial and to investigate its effect on some properties of heat cured acrylic denture base materials.Materials and methods: Sliver –zinc zeolite was prepared by ion exchange method and characterized thenincorporated into poly (methylmethacrylate) powder in0.5% by weight. Specimens were constructed and dividedinto 6 groups according to the using tests; each group was subdivided into 2 groups. The tests conducted in this studywere: impact strength test, transverse strength test, surface hardness test, surface roughness test, water sorption test,water solubility test and color change measurement after addition. The results were statistically analyzed by t-test atp value≤ 0.05.Results: Characterization methods results showed the incorporation of sliver and zinc ion without change of zeolitestructure framework. A non-significant effect resulted from the addition of 0.5% sliver –zinc zeolite on the impactstrength, transverse strength, surface hardness, surface roughness and cause no change in color of heat curedenture base. Also a highly significant decrease in water sorption and a significant increase of water solubility wereobserved.Conclusion: Preparation of sliver-zinc zeolite could be performed successfully and the addition of 0.5% ofantimicrobial sliver-zinc zeolite into heat cure acrylic had a non significant effect on the impact strength, transversestrength, surface hardness, surface roughness and did not change the color, also there was a significant decrease inwater sorption and increase in water solubility of acrylic resin


Article
Molecular Characteristics of Multidrug Resistant Acinetobacter baumannii Isolated from Baghdad Hospitals
الخصائص الجزيئية لبكتريا Acinetobacter baumannii متعدده المقاومة للمضادات الحيوية والمعزولة من مستشفيات بغداد

Authors: Khitam K. AL-Masoudi ختام خالص المسعودي --- Jinan M. AL-Saffar جنان محمد الصفار --- Nuha J. Kendla نهى جوزيف قندلا
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2015 Volume: 56 Issue: 2B Pages: 1394-1399
Publisher: Baghdad University جامعة بغداد

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Abstract

A total of 100 clinical sample from (urine, sputum and swabs of wound , burn and ear) were collected from patients in different hospitals of Baghdad during the period from December 2013 to May 2014. 15 isolates (15%) identified belong to Acinetobacter baumannii, swabs of wounds were represented in high percentage of A.baumannii isolates (40%) while percentage of other samples were variable. Susceptibility of 15 A.baumannii isolates were tested toward 16 different Antimicrobial agents, the results showed all isolates were multi drug resistant. In addition, Polymerase Chain Reaction Technique (PCR) was performed to detection the resistance genes encoding the Oxacillinases enzymes. The PCR analysis showed that the presence of insertion sequence (ISAba1) in 13 isolates whereas blaoxa51like gene was represented in 12 isolates. Furthermore, the results of detection other genes were not appear any amplification for all A.baumannii isolates with genes encoded for bla oxa 58 and bla oxa 143 enzyme.

شملت الدراسة 100 عينه سريريه ومن مصادر مختلفة (الإدرار،القشع،مسحات الجروح،مسحات الحروق ومسحات الإذن) من مرضى مستشفيات مختلفة في بغداد، خلال الفترة الممتدة من كانون الأول 2013 حتى مايس 2014.،شخصت 15 عزله(15%) تعود إلى Acinetobacter baumannii وكانت أعلى نسبه تشخيص تعود إلى مسحات الجروح(40%) وتغايرت نسبه العزل في مصادر العينات الأخرى.اختبرت حساسية عزلات بكتريا Acinetobacter baumannii باتجاه 16 مضاد حيوي، أظهرت نتائج الاختبار أن جميع العزلات كانت متعدده المقاومةللمضادات الحيويه. استخدم تقنيه Polymerase Chain Reaction Technique (PCR) للتحري عن امتلاك العزلات قيد الدراسة على الجينات التي تشفر إلى g(Oxacillinase) فوجد 13 عزله تشفر للتسلسل ISAba1، بينما 12 عزله كانت تحتوي على bla oxa 51 gene إما bla oxa58 gene and bla oxa 143 gene أظهرت نتيجة سالبه لكل العزلات.


Article
Synthesized compounds used as antimicrobial against the microorganisms in cooling fluids

Author: Saif AL-Deen Muafaq Abdul Hadi
Journal: Iraqi National Journal Of Chemistry المجلة العراقية الوطنية لعلوم الكيمياء ISSN: 22236686 Year: 2009 Issue: 36 Pages: 648-659
Publisher: Babylon University جامعة بابل

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Abstract

Abstract In this work synthesized compounds have been used as antimicrobial against the microorganisms which have been found in the cooling fluid of industrial purposes ' by using media culture the results showed that sodium and potassium salts of 2-Mercaptobenzothiazole (2-MBT) are comparatively highly active in killing bacteria. The pH of the cooling fluid samples had been measured after the addition of the media as well as the inhibitors 2-MBT , Sodium2-Mercaptobenzothiazole (Na2-MBT) , Potassium2-Mercaptobenzothiazole (K2-MBT) , and Benzothiazole disulfide (BT-disulfide). The results of PH measurement revealed that Na2-MBT and K2-MBT exhibit higher activity to inhibit the growth of bacteria compared with other synthesized compounds. The turbidity for such media and inhibitors has also been measured and the results indicated that Na2 -MBT, K2-MBT have given low turbidity compared to that of other synthesized compounds .The results indicate that the biological activities of the compounds Na2-MBT, K2-MBT are the best relative to the other synthesized compounds to inhibit the bacteria or the microorganisms that grow in the cooling fluid.

الخلاصة في هذا البحث حضرت مركبات استخدمت كعامل مضاد للكائنات الحية المجهرية التي تتواجد في سوائل التبريد المستخدمة للاغراض الصناعية . و ذلك باستخدام عملية الزرع التي اثبتت نتائجها بان املاح الصوديوم و البوتاسيوم للمركب 2-مركبتوبنزوثايزول(2-MBT) تكون ذات فعالية عالية لقتل الاحياء المجهرية . كما قيس ال PH لنماذج سوائل التبريد بعد اضافة المانعات الى الوسط و هي مركبتوبنزوثايزول و صوديوم 2-مركبتوبنزوثايزول (Na2-MBT) و بوتاسيوم 2- مركبتوبنزوثايزول (K2-MBT) و بنزوثايزول دايسلفيد (BT-disulfide), و اثبتت نتائج قياس ال PH ان لاملاح الصوديوم و البوتاسيوم فعالية كبيرة لمنع نمو البكتريا مقارنة مع بقية المركبات. كما قيست درجة العكورية للاوساط الملحية و اثبتت ان املاح الصوديوم و البوتاسيوم لها اقل قيمة للتعكر مقارنة مع بقية المركبات المحضرة . واثبتت النتائج ان مركب ملح الصوديوم و مركب ملح البوتاسيوم هي الافضل من بقية المركبات المحضرة لمنع نمو البكتريا و الكائنات المجهرية الاخرى التي تنمو في سوائل التبريد .


Article
The Effect of Silver-Zinc Zeolite Incorporation on Some Properties of Condensation Silicone Impression Material

Authors: Rehab A. Al-Azawi رحاب العزاوي --- Widad A. Al-Naqash وداد النقاش
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2016 Volume: 28 Issue: 4 Pages: 22-27
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: elastomeric impression materials are indicated when a high degree of accuracy is required, due to their excellent properties like details reproduction, dimensional stability and tear strength but with main two disadvantages those are their hydrophilicity as well as the absence of antibacterial activity. This study aimed to evaluate the effect of incorporation of 0.5% wt Ag-Zn zeolite into condensation silicone through the following tests; setting time, dimensional stability, reproduction of details, wettability, and hardness .Materials and methods: one hundred specimens were constructed of condensation silicone, divided into two groups for the first 50 specimens one0.5% by wt Ag -Zn zeolite was added, keeping the other fifty specimens without addition. Then each group further subdivided into five subgroups according to the conducted test. The tests performed were; setting time, dimensional stability, reproduction of details, hardness and wettability.Results: A statistically non-significant effect on the setting time and reproduction of details tests was observed, combined with a highly significant increase of wettability of condensation silicone after incorporation of 0.5% wt Ag-Zn zeolite with non-significant increase of dimensional change of condensation silicone following incorporation of 0.5% wt Ag-Zn zeolite. Hardness test results shoed statistically significant increase following the addition of Ag-Zn zeolite.Conclusion: Ag-Zn zeolite incorporated into condensation silicone, improved wettability which determine the extent to which an impression material replicates the structures of the oral cavity and production of bubble-free gypsum die. It also showed a statistically significant increase in the hardness of condensation silicone impression material, and had no effect on setting time, reproduction of details and dimensional stability.


Article
Silver Nanoparticles Synthesized by Using Matricaria chamomilla Extract and Effect on Bacteria Isolated from Dairy Products
تخليق جزيئات الفضة النانوية باستخدام مستخلص نبات البابونج Matricaria chamomilla وتأثيره على بكتيريا المعزولة من منتجات الألبان.

Author: Payman A. Kareem بيمان علي كريم
Journal: Diyala Journal For Pure Science مجلة ديالى للعلوم الصرفة ISSN: 83732222 25189255 Year: 2018 Volume: 14 Issue: 4 Pages: 176-187
Publisher: Diyala University جامعة ديالى

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Abstract

This study was conducted for the synthesis of small sized silver nanoparticles using the plant extract of Matricaria chamomilla. Matricaria chamomilla is rapid, non-toxic, eco-friendly, cost effective for the synthesis of nanoparticles. The results showed that the color formed by combining the extract with the 1mM silver nitrate solution changed to deep brown. The synthesis and characterization of silver nanoparticles was confirmed by ultraviolet-visible spectrophotometry and Fourier Transform Infrared Spectrometry techniques. UV-VIS was also used of showed peak absorption measurements in the wavelength 430 nm. FTIR spectrum indicates for detection of functional groups responsible for the formation on the surface of the nanoparticles. When evaluating effectiveness of silver nitrate with the plant extract on Staphylococcus aureus, Escherichia coli and Brucella melitensis. The result showed the synergistic action of AgNO3 and the plant extract leading to enhance antibacterial activity.

أجريت هذه الدراسة لتخليق جسيمات الفضة النانوية الصغيرة الحجم باستخدام مستخلص نبات البابونج Matricaria chamomilla هو عامل مختزل ومناسب للبيئة لإنتاج الجسيمات النانوية .وأظهرت النتائج أن تغير لون المزيج المتكون من المستخلص و1 mM نترات الفضة إلى اللون البني الداكن. ووصفت الجسيمات الفضة النانوية المصنعة باستخدام جهاز طيف الأشعة فوق البنفسجية وتقنيات التحليل الطيفي الأشعة تحت الحمراء FTIR .أظهر الطيف المرئي للأشعة فوق البنفسجية للمحلول المائي الذي يحتوي على الجسيمات الفضة النانوية عند طول الموجي 430 نانومتر. يشير FTIR للكشف عن مجموعات وظيفية مسؤولة عن تشكيل على سطح الجسيمات النانوية. عند تقييم فعالية نترات الفضة مع المستخلص النباتي على المكورات العنقودية الذهبية، الإشريكية القولونية والبروسيلا مليتنسيس. وأظهرت النتيجة العمل التآزري من AgNO3 والمستخلص النبات مما يؤدي إلى تعزيز النشاط المضاد للبكتيريا.

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