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Article
Concentration of Hydrogen Peroxide by Batch Distillation Column

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Abstract

An investigation was conducted to study the concentration of hydrogen peroxide by vacuum distillation. The effect of the process variables (such as vacuum pressure, pa lime of distillation and packing height of the column used in the distillation process) on the concentration of hydrogen peroxide were investigated. During the third stage of distillation (95 wt. %)concentration was obtained.Box-Wilson central composite rotatable design is used to design the experimental work for the mentioned variables. It was found that the concentration of hydrogen peroxide increases with:Jncreasing vacuum pressure, decreasing reflux ratio, increasing the time of distillation and increasing the packing height.The second order polynomial regression analysis of the objective response (concentration of hydrogen peroxide).


Article
COMPARISON BETWEEN HYDROGEN PEROXIDE, ICED PACKS AND NON AGENT PACKS IN TONSILLECTOMY HAEMOSTSIS
مقارنة بين استعمال الشاش المنقوع ببيرو كسيد الهيدروجين ، بالسائل الملحي البارد و الشاش غير المنقوع في عملية استئصال اللوزتين

Authors: Dr .Mushtaq Nemaa د. مشتاق نعمة --- Dr. Moayad Naji Majeed د. مؤيد ناجي مجيد --- Dr .Ali Abid Saadoon Al –Guzi د. علي عبد سعدون
Journal: Thi-Qar Medical Journal مجلة ذي قار الطبية ISSN: 19929218 Year: 2011 Volume: 5 Issue: 3 Pages: 8-15
Publisher: Thi-Qar University جامعة ذي قار

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Abstract

ABSTRACT Objectives: Tonsillectomy is one of the operations most frequently performed by otolaryngologists, who are in search of a technique of tonsillectomy where the operation time and operative blood loss is reduced. This study was carried outto evaluate the effect of hydrogen peroxide 3% in comparison with iced normal saline on tonsillectomy times, blood loss during the surgery and on the number of packs used.Methods: Analytical cross sectional study was performed on thirty patients was carried out in the Department of Otolaryngology of AL-Habbobi General Hospital,AL-Nassyria, Iraq, in the period from the 1st week of March 2010 till the last week of November 2010. Tonsillectomy was performed using hydrogen peroxide 3% as a haemostatic agent in Group A(n = 15 tonsils), while in Group B (n = 15 tonsils) iced normal saline was used where as no agent was used with the gauze pack in GroupC(n=30 tonsils). Results: The application of pack socked with hydrogen peroxide 3% or iced saline in the tonsillar fossae reduced the operation time , the operative blood loss and also reduced the number of packs used in Group A and B in comparison with non agent method . The results were statistically significant. Conclusion: The local application of 3% hydrogen peroxide on the tonsillar bed after tonsillectomy is beneficial to decreasing the volume of blood loss more than other applications;while no significant difference between group A and B regarding the number of packs used and duration of operation

الخلاصة: عملية استئصال اللوزتين هي إحدى أكثر العمليات التي تجري من قبل جراحي الأنف والأذن والحنجرة اللذين يبحثون في الطرق التي تؤدي إلى اختصار وقت العملية وكمية خسارة الدم أثناء اجرائها0في هذه الدراسة كان الهدف هو أجراء مقارنة بين فائدة استعمال الشاش المنقوع ببيرو كسيد الهيدروجين 3%,مع الشاش المنقوع بالمحلول الملحي البارد في اختصار وقت العملية ,كمية الدم المفقود وعدد لفات الشاش المستخدم 0طريقة العمل : أجريت هذه الدراسة التحليلية المقطعية على ثلاثين مريضا"(60لوزة) في صالة عمليات الأنف ولأذن والحنجرة في مستشفى الحبوبي العام في الناصرية –العراق للفترة منذ الأسبوع الأول من شهر آذار 2011الى الأسبوع الأخير من شهر تشرين الثاني 2011 تم تقسيم اللوزات الى ثلاث مجاميع ,مجموعة أ(15 للوزة) ,مجموعة ب(15 لوزة) والمجموعة الثالثة ج(30 لوزة) 0استعمل للمجموعة الأولى الشاش المنقوع بمادة بيرو كسيد الأوكسجين 3% وللمجموعة الثانية الشاش المنقوع بالمحلول الملحي البارد في حين لم يستخدم أي محلول مع الشاش في المجموعة الثالثة0النتائج: أظهرت النتاج أن الوقت كان اقصر وكمية خسران الدم وعدد لفات الشاش اقل في المجموعة التي استخدم فيها بيرو كسيد الهيدروجين 3%0الاستنتاج: استعمال بيرو كسيد الهيدروجين 3% ذو فائدة واضحة في اختصار وقت العملية وتقليل كمية الدم المفقود وعدد لفات الشاش المستخدم أثناء عملية استئصال اللوزتين أكثر من المحلول البارد والذي هو أفضل بدوره من الشاش غير المنقوع


Article
An Evaluation of the Effect of Bleaching Agent on Microhardness of a New Silorane-Based Restorative System and Methacrylate-Based Restorative Material

Authors: Shatha Abdul Kareem --- Rasha Hameid Jehad
Journal: Journal of University of Babylon مجلة جامعة بابل ISSN: 19920652 23128135 Year: 2012 Volume: 20 Issue: 1 Pages: 385-363
Publisher: Babylon University جامعة بابل

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Abstract

Background: The high reactivity of hydrogen peroxide used in bleaching agents have raised important questions on their potential adverse effects on physical properties of restorative materials. The purpose of this in vitro study was to evaluate the effect of in-office bleaching agents on the microhardness of a new Silorane-based restorative material in comparison to methacrylate-based restorative material.Materials and method: Forty specimens of Filtek™ P90 (3M ESPE,USA) and Filtek™ Supreme XT (3M ESPE, USA) of (8mm diameter and 3m height) were prepared. All specimens were polished with Sof-Lex disks (3M ESPE, USA). All samples were rinsed and stored in incubator 37˚C for 24 hours in DDW. Ten sample of each material were subjected to 37.5% hydrogen peroxide gel (Pola office +, SDI)for 8 minutes while exposed to light curing device, this step was repeated three times for 3 weeks. While the other ten samples for each material was served as control. All specimens were subjected to microhardness test using digital microhardness tester to determine the VHN (Vickers Hardness Number)Results : The Filtek™ P90 exhibited higher microhardness value than Filtek™ Supreme XT. After hydrogen peroxide treatment, both types of composites exhibited low microhardness values but still Filtek™ P90 is harder than Filtek™ Supreme XT.Conclusion : In-office hydrogen peroxide bleaching agent resulted in reduction in microhardness values for both composite materials. Silorane- based composite is more affected by the bleaching agent than methacrylate-based composite.


Article
The effect of 35% H2O2 and 22%carbamide peroxide on compressive strength of composite resin

Authors: Majida K.W. AL-Hashimi ماجدة الهاشمي --- Aliaa M. Jabbar علياء محمد جبار
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2011 Volume: 23 Issue: 4 Pages: 16-19
Publisher: Baghdad University جامعة بغداد

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Abstract

Back ground: The compressive strength of composite resin may be affected by bleaching agent. This study wasconducted to evaluate the effect of two different bleaching agents; at home (22% carbamide peroxide) and inoffice; light activated (35% hydrogen peroxide) bleaching agent on the compressive strength of light curedcomposite resin; spectrum (submicron hybrid composite).Material and methods: A total number of 20 samples were prepared,10 samples for each type of bleaching agentwhich were divided in to 2 groups; first group was subjected to at-home bleaching for one day. The second groupwas subjected to at-home bleaching for one week, The third group was subjected to the in-office (35% H2O2) for oneday. The forth group was subjected to in-office bleaching for three days.Results: There were statistically significant differences between the tested groups (p=0.048). Highly significantreduction of the compressive strength of composite was observed subsequent to treatment with H2O2 for three times.Conclusion: Reduced compressive strength was detected in composite when it was subjected to bleaching processwith H2O2 carbamide peroxide.


Article
EFFECTS OF ACETIC ACID AND HYDROGEN PEROXIDE ON THE MICROBIOLOGICAL QUALITY AND SKIN APPEARANCE OF POULTRY CARCASSES
تأثير حامض الخليك وبيروكسيد الهيدروجين على المحتوى الميكروبي ومظهر الجلد لذبائح الدواجن

Author: AlaaT.Abdul Wahid آلاء طارق عبد الواحد
Journal: Basrah Journal of Veterinary Research. مجلة البصرة للابحاث البيطرية ISSN: Print:18138497 E; 24108456 Year: 2008 Volume: 7 Issue: 2 Pages: 97-100
Publisher: Basrah University جامعة البصرة

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Abstract

The microbiological quality and skin appearance of poultry carcasses were determined after acetic acid and hydrogen peroxide spray. Acetic acid at 1% concentrations showed a significant effect(P<0.05)in reducing total mesophilic bacteria count, total coli form count, Escherichia coli count and Staphylococcus aureus count when compared with a sample without treatment,10.50x103,1.03x103,7.5x101,1.05 x102 and 27.47x103, 2.71x103, 4.41x102, 2.74x102 cfu/cm2 respectively. No differences were observed in skin appearance due to 1% acetic acid treatment. Hydrogen perioxide at 1% concentrations did not significantly(P>0.05) effect the microbial load when compared with asample without treatment,26.33x103, 2.61x103,3.70x102,2.63x102and 27.47x103 ,2.71x103,4.41x102,2.74x102 cfu/cm2 respectively. The skin of carcasses treated with H2O2 ,was bleached and bloated.

تم استقصاء تاثير المعامله الكيميائيه باستخدام حامض الخليك وبيروكسيد الهيدروجين على النوعيه الميكروبيه ومظهر الجلد لذيائح الدواجن،وقد اظهرت النتائج تاثير معنويا في معدلات العد البكتير ي الكلي، عد بكتريا القولون ، بكتريا الاشيريشيا القولونيه والمكورات العنقوديه الذهبيه المعامله بحامض الخليك بالمقارنه مع العينه الغبر معامله 10.5X 10 3 ، 1.03X 310، 7.5X 110 ، 1.05 X 210 و 27.47X 310، 2.71X 310 ،4.41X 210 ، 2.74X210 و.ت.م /سم2 على التوالي ، لم يلحظ اختلاف على مظهر الجلد للعينه المعامله بحامض الخليك. كما اوضحت النتائج ان اضافه بيروكسيد الهيدروجي الى ماء لم يوثر على النوعيه الميكروبيه للذبيحه بالمقارنه مع العينه الغبر معامله 26.33X 10 3،2.61 X 10 3،3.70X 10 2 ،2.63X 10 2 و 27.47X 310 ، 2.71X 310،4.41X 210 ، 2.74X210و.ت.م /سم2 على التوالي . جلد الذبيحة المعامله ببيروكسيد الهيدروجين اصبح مبيض ومنتفخ المظهر.


Article
Changes in Color and Roughness with Laser Bleaching using different Peroxide Concentrations

Author: Fadi Al Hano
Journal: Journal of Oral and Dental Research مجلة طب الفم والاسنان ISSN: 23106417 Year: 2013 Volume: 1 Issue: 1 Pages: 6-12
Publisher: Iraqi Association for Oral Research الجمعية العراقية لبحوث طب الفم

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Abstract

Purpose: The use of different H2O2 concentrations for in-office bleaching has been questioned. Thus, theaim of this study was to evaluate the efficiency of laser bleaching on color changes and surface roughnessof bovine enamel with different peroxide concentrations. Materials and methods: Forty eight bovine incisors cleaned and labial surface polished up to #1200. Halfof them were artificially stained with black tea and divided into three subgroups and bleached according tothe concentration of H2O2 (15%, 25% and 35% ) (n=8). Specimens were bleached with laser hybrid system(DMC Whitening Lase II, Sao Paulo, Brazil). CIE Lab color system was used to evaluate color using VitaEasyshade Spectrophotometer (Ivoclar Vivadent, Liechtenstien). The remaining specimens were used forsurface roughness evaluation following bleaching. The enamel roughness (Ra) values were measured by StylusProfilometer (Suf-Corder SE 1200, Tokyo, Japan) and Atomic force microscopy (AA3000,Bosten,USA)before and after bleaching. Data were analyzed with Paired sample T-test to evaluate color changes andRa values at each concentration. ANOVA and Tukey test were used to evaluate the difference between thegroups with different bleaching agent concentrations. All tests were computed at 5% significance level. Results: Significant increases in degree of lightness (L*) values observed following bleaching at all concentrations.Different concentrations of peroxide produced significantly different Ra values. Bleachingwith 35% agent produced significantly higher L* value than 15% but similar to 25%. Exposing enamel tohigh peroxide concentration (25% and 35%) significantly increased Ra value in comparison to unbleachedenamel.Conclusion: Color changes and surface roughness of bovine enamel were influenced by hydrogen peroxideconcentrations of DMC laser bleaching system.


Article
Determination of hydrogen peroxide in some local pharmaceutical disinfectants by continuous flow injection analysis via turbidimetric (T180o) and scattered light effect at two opposite positions (2N90o ) using Ayah 4SW-3D-T180o -2N90o -Solar - CFI Analyser
تقدير بيروكسيد الهيدروجين في بعض المطهرات الصيدلانية باستخدام تحليل الحقن الجرياني المستمر عن طريق قياس التعكريه (T180° ) وتأثير استطاره الضوء عند اتجاهين متعاكسين (2N90° ) باستخدام المحلل Ayah 4SW-3D-T180o -2N90o -Solar - CFI

Authors: Nagam S. Turkey Al-Awadie نغم شاكر تركي العوادي --- Ahmed F. Khudhair أحمد فاضل خضير
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2015 Volume: 56 Issue: 1C Pages: 577-592
Publisher: Baghdad University جامعة بغداد

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Abstract

An indirectly method is used to determine hydrogen peroxide. The method based on oxidation of chromium (III) ion by hydrogen peroxide in basic medium to form chromate ion which react with barium (II) ion to produce a yellow precipitate (BaCrO4). Under the optimum established conditions, the linear range of 0.50-25.00 mmol L-1 along with correlation coefficient (r) of 0.9992, Limit of detection (LOD) 0.68 µg / 100 µL, precision expressed as relative standard deviation for six replication measurements at 5.0 mmol.L-1 H2O2 of less than 2% were obtained for hydrogen peroxide. The developed method was successfully applied for the estimation of H2O2 in three pharmaceuticals preparation of different companies using continuous flow injection or stop-flow injection technique.

تم التقدير غير المباشر لبيروكسيد الهيدروجين من خلال تكوين راسب أصفر من كرومات الباريوم الناتج من اكسدة آيون الكروم (III) بأستعمال بيروكسيد الهيدروجين في الوسط القاعدي لتكون آيون الكرومات الذي يتفاعل مع آيون الباريوم(II) اذ كان مدى الخطية لمحلول بيروكسيد الهيدروجين بين (0.50-25.00) مللي مول.لتر-1 مع معامل الارتباط (r) 0.9992 , تم الحصول على حد كشف (L.O.D) 0.68 مايكروغرام 100 مايكرولتر و الانحراف القياسي النسبي المئوي لتركيز 5.0 مللي مول.لتر-1 أقل من 2% (n = 6). طبقت الطريقة بنجاح لتقدير بيروكسيد الهيدروجين في ثلاث مستحضرات صيدلانيه( شركات مختلفه) باستخدام جريان مستمر او جريان توقف.


Article
Antioxidant activity of Linalool

Authors: Majid S. Jabir --- Ali A. Taha --- Usama I. Sahib
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 1 Part (B) Scientific Pages: 64-67
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In recent years, Essential oils from their various aromatic plants hadbeen reported to be used in treating of many types of cancer due to their antitumoractivity. In addition, numerous studies had investigated the highest capability ofchemopreventive phytochemicals compound to act as anticancer drugs. In thepresent research, the antioxidant activity of Linalool on free radicals compoundswas studied. The Antioxidant activity was performed using two methods, DPPHand Hydrogen Peroxide (H2O2) Scavenging Capacity. The DPPH scavengingactivity demonstrated that Linalool had antioxidant activity comparing withascorbic acid. Linalool demonstrated moderate antioxidant activity with50.57471% compared with ascorbic acid that showed 86%. Meanwhile, H2O2scavenging capacity methods investigated that Linalool exhibited moderatescavenging activity 56.36% comparing with ascorbic acid that showed 65%. Theresults of this study investigated that the Linalool can be used as easily accessiblesource of natural antioxidants. It can able to be used in the treating several typesof cancers as a result of antioxidant activity of it.


Article
Effect of 38%hydrogen peroxide agent on color change of composite resins stained with tea and coffee beverages (An in vitro study)

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Background: The esthetic application of bleaching materials has gained popularity,with consequences for teeth and restorative materials. The purpose of this an invitro study was to investigate the effect of in-office bleaching agent (38%hydrogen peroxide) on the color change of three composite resins after stainingwith tea and coffee beverages.Materials and Methods: Sixty disc-shaped samples from three different compositeresins (Tetric Ceram, Tetric Flow and Tetric Evo Ceram) were used in this study.The samples of each group were randomly divided into two subgroups accordingto type of beverages (tea and coffee) used for staining of samples. After stainingof composite resins the total color change (ΔE1 ) was calculated usingspectrophotometer, then the samples immersed in WHITEsmile® office bleachingagent for 15 min x 3 times with a 7 days interval followed by ΔE2 calculation.Data were subjected to the ANOVA, LSD and student t-test at 0.05 significancelevel.Results: The results revealed that, there was clinically significant color change ΔE>3.3 with a statistically highly significant differences (P=0.000) for all the groups.Coffee causes more discoloration than tea. After bleaching, the samples becamewhiter in color and only appreciable by skillful operator but considered clinicallyacceptable ΔE1 - ΔE2 < 3.3.Conclusion: Tea and coffee beverages causes discoloration in composite but thiseffect was depended on the type of beverages and composite resins. The most ofcolor change occurred with Tetric Flow composite resin after immersion in coffeebeverage. The bleaching agent (38% hydrogen peroxide) can remove the stainingof composite resins and make its color clinically acceptable.


Article
A comparative study evaluates the effect of Hydrogen peroxide 38% and Carbamide peroxide 35% bleaching products on enamel microhardness (In vitro study)

Author: Dr. Reem Hassan Majeed, BDS. MSc د. ريم حسان مجيد
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2012 Volume: 9 Issue: 2 Pages: 164-171
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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The aim of this study was to compare the effect of two professional bleachingproducts (in-office Opalescence Boost hydrogen peroxide 38%) and (home bleachingOpalescence carbamide peroxide 35%) on enamel microhardness.The sample consist of thirty maxillary first premolars teeth (freshly extracted),caries free obtained from children aged 12 years old under routine orthodontictreatment. The teeth were sectioned mesiodistally parallel to the long axis of tooth andmounted on acrylic mold. The specimens were divided into two halves buccal andpalatal as per treatment, the buccal half served as experimental, while the palatal halfserved as control (1) and kept in artificial saliva at 37c0 for two weeks. Microhardnesstest were obtained before and after bleaching.Results indicated that teeth specimens submitted to Opalescence carbamideperoxide 35% showed highly significant reduction in enamel microhardness P<0.01,while no-significant difference in enamel microhardness in specimens submitted toOpalescence Boost 38% hydrogen peroxide P>0.05.In this study Opalescence carbamide peroxide 35% leads to the significantdecrease in enamel microhardness compared to Opalescence Boost hydrogenperoxide 38%.

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