research centers


Search results: Found 13

Listing 1 - 10 of 13 << page
of 2
>>
Sort by

Article
A Mathematical Model to Determination of Alum Amount Added for the Purpose of Coagulation in Water Purification Plants

Authors: Hassan A. Omran --- Mizher A. Kadhim
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 4 Part (A) Engineering Pages: 456-460
Publisher: University of Technology الجامعة التكنولوجية

Loading...
Loading...
Abstract

Chemicals are used to increase the settling velocity for suspended deposition colloids which are not settled in sedimentation tanks in water purification plants . For this purpose, the alum is used in wide spread across the water purification projects in Iraq. This research contains studying the factors that effect on alum amount added by conducting laboratory tests of water samples from Euphrates river at the purification plant in AL-Musayyab city over ten years (with monthly rate). It was noted that the amount added depends heavily on the turbidity of water entering the purification plant, in addition to water temperature and its pH. The results of laboratory tests have been approved, which included the measurement of the turbidity, pH, temperature, and the value of alum added. Since this method is applicable in all water purification plants. The results during the period of ten years are accredited, and subjected to multi -regression analysis. A mathematical model was conducted to calculate the alum dose, which must be added depending on the raw water turbidity, temperature, and pH. This model also has been examined by using data of another years and gave satisfactory results to be up to 91% each. This model compensates the use of the Jar-test of raw water to determine the amount of alum that must be added and sufficient by measuring the turbidity, temperature, and pH of the raw water only, and then calculating the value of the required dose of alum.

Keywords

Alum Dose --- Coagulation --- Turbidity --- pH


Article
Determination of Radon Concentration and Annual Effective Dose Inside Houses in Left Side of Mosul City During Winter
تحديد مستويات تركيز الرادون والجرعة المؤثرة السنوية في الدور السكنية لبعض أحياء الساحل الأيسر من مدينة الموصل شتاءً

Author: Sabah Y. Hasan صباح يوسف حسن
Journal: Rafidain journal of science مجلة علوم الرافدين ISSN: 16089391 Year: 2018 Volume: 27 Issue: 2E Pages: 65-71
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

In this study, radon concentration, annual effective dose, potential alpha energy concentration (PAEC), and average of lung cancer per million persons from radon were measured using (closed can technique) containing CR-39 nuclear track detector. Measurements were carried during winter season inside twenty four hoses in eight locations in the left side of Mosul City. The average radon concentration ranged between (52.97±5.315 to 74.98±5.433) Bq.m-3 with an average value (62.36±7.518) Bq.m-3 which is much lower than the recommended by ICRP action level (200-600) Bq.m-3. The results showed that the potential alpha energy concentration ranged between (5.71×10-3±0.566 ×10-3 to 8.11×10-3 ±0.586 ×10-3) WLM with an average value (6.7×10-3±0.820×10-3) WLM, while the annual effective dose ranged between (1.34±0.134 to 1.89±0.137) mSvy-1 with an average value (1.57±0.189) mSvy-1. It is observed that this value less than the recommended levels (3-10) mSvy-1 reported by ICRP. The average lung cancer cases per year per million persons were found to be 28.3±3.404, there were no induction of existence of radon problems in this survey

في هذه الدراسة تم تحديد معدل تركيز الرادون، الجرعة المؤثرة السنوية ومعدل خطر الاصابة بسرطان الرئة لكل مليون شخص، وقد اجريت الدراسة خلال فصل الشتاء على 24 منزلا في ثمانية احياء سكنية شرق مدينة الموصل باستخدام مجراعات رادونية تراكمية تمت معايرتها مسبقا وهي محتوية على كواشف الحالة الصلبة للمسارات النووية نوع CR-39 خلال فصل الشتاء. تراوحت تراكيز الرادون بين (52.97±5.315 - 74.98±5.433) Bq.m-3 وبمعدل (62.36±7.518) Bq.m-3. تعد هذه القيم اقل من القيم المسموح بها من قبل ICRP التي تتراوح بين (200-600) Bq.m-3. تراوحت تراكيز طاقة الفا الكامنة بين (5.71×10-3±0.566 ×10-3 - 8.11×10-3 ±0.586 ×10-3) WLM وبمعدل (6.7 ×10-3±0.820×10-3) WLM، في حين تراوحت الجرعة المؤثرة السنوية بين (1.34±0.134 - 1.89±0.137) mSvy-1 وبمعدل (1.57±0.189) mSvy-1 وهي اقل من المستوى الذي اوصت به ICPR والبالغ (3-10) mSvy-1. أظهرت النتائج بأن خطر الإصابة بسرطان الرئة السنوي يساوي 28.3±3.404 لكل مليون شخص، كما تبين بأنه ليس هناك خطراً للرادون في المناطق قيد الدراسة.


Article
Estimation the annual dose for residents in the area around the berms of Al-Tuwaitha nuclear site using RESRAD software
تخميين الجرعة السنوية للمقيمين في المنطقة حول سواتر موقع التويثة النووي باستخدام برنامج RESRAD

Authors: Hussein Jabbar Mugar حسين جبار موجر --- Mahdi Hadi Jasim مهدي هادي جاسم
Journal: Iraqi Journal of Physics المجلة العراقية للفيزياء ISSN: 20704003 Year: 2018 Volume: 16 Issue: 37 Pages: 23-31
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

RESRAD is a computer model designed to estimate risks and radiation doses from residual radioactive materials in soil. Thirty seven soil samples were collected from the area around the berms of Al-Tuwaitha site and two samples as background taken from an area about 3 km north of the site. The samples were measured by gamma-ray spectrometry system using high purity germanium (HPGe) detector. The results of samples measurements showed that three contaminated area with 238U and 235U found in the study area. Two scenarios were applied for each contaminated area to estimate the dose using RESRAD (onsite) version 7.0 code. The total dose of resident farmer scenario for area A, B and C are 0.854, 0.033 and 2.15×10-3 mSv.yr-1, respectively. While suburban resident scenario for area A, B and C are 0.807, 0.031 and 2.04×10-3 mSv.yr-1, respectively.

RESRAD هو نموذج حاسوبي مصمم لتقدير المخاطر والجرعات الإشعاعية من المواد المشعة المتبقية في التربة. سبعة وثلاثون نموذج جمع من المنطقة المحيطة بسواتر موقع التويثة وأنموذجان كخلفية اشعاعية اخذت من منطقة تبعد حوالي 3 كم شمال الموقع. النماذج قيست بواسطة نظام قياس طيف أشعة غاما بأستعمال كاشف الجرمانيوم عالي النقاء (HPGe). نتائج قياس العينات بينت بأن هناك ثلاثة مناطق ملوثة باليورانيوم-238 و اليورانيوم-235 وجدت في منطقة الدراسة. تم تطبيق سيناريوهان لكل منطقة ملوثة لتقدير الجرعة باستخدام RESRAD (onsite) الإصدار 7.0. الجرعة الكلية لسيناريو المزارع المقيم للمناطق A وB وC كانت 0.854 و0.033 و 2.15×10-3 ملي سيفرت لكل سنة على التوالي, بينما سيناريو المقيم في الضاحية للمناطق A وB و C كانت 0.807 و 0.031 و 2.04×10-3 ملي سيفرت لكل سنة على التوالي.


Article
Role of Low-Dose Human Chorionic Gonadotropin Following Clomiphene Citrate in Folliculogenesis and Ovulation in Infertile Women

Authors: Omaima I. Khalaf --- Manal T. Al-Obaidi --- Lubna A. Al-Anbari
Journal: Iraqi Journal of Embryos and Infertility Researches المجلة العراقية لبحوث الأجنة والعقم ISSN: eISSN: 26166984 / pISSN: 22180265 Year: 2018 Volume: 8 Issue: 1 Pages: 29-37
Publisher: Al-Nahrain University جامعة النهرين

Loading...
Loading...
Abstract

Background:Ovulation disorders, usually presents as menstrual disturbance, arethe cause of infertility in around 25% of couples who have difficulty to conceive.The drug most commonly prescribed for the induction of ovulation is clomiphenecitrate (CC). If the patient does not ovulate after the use of CC, the choice wasto add gonadotropins. Gonadotropin therapy is very expensive with significantrisks of high order multiple gestations and ovarian hyperstimulation syndrome.Human chorionic gonadotropin hCG can function as a surrogate for LH and occupiesLH receptors for more than 24 hours allowing prolonged stimulation alsoit has longer half-life and greater affinity for the LH receptor.Objective: The purpose of this study was to compare the effectiveness of lowdosehuman chorionic gonadotropin (hCG) in the late follicular phase to induceovulation in clomifene citrate resistant patients who had previously failed toovulate on clomiphene citrate (CC) alone.Subjects,Materials and Methods: A total of 71 patients who attend infertilityclinic in the High Institute of Infertility Diagnosis and Assisted ReproductiveTechnologies, Al-Nahrain University, where prospectively randomly assignedinto two groups. hCG Group received 100 mg dose of CC from day 5 of menstrualcycle for 5 days, then each patient received 200 IU hCG (DICLAIR®)subcutaneous injection daily when the largest follicle mean diameter was 12 mmor larger starting on day twelve of menstrual cycle. Non-hCG group received 150mg dose of CC from day 5 of menstrual cycle for 5 days, and both groups weremonitored with transvaginal ultrasound. Ultrasound measurements of folliclenumber and growth, ovulation, endometrial thickness and pattern were recordedand compared between the two groups. Student t test and fisher exact test wereused for statistical comparison between the two groups.Results: The low-dose hCG group had significantly higher percentage of ovulatorycycles (80% vs 44.4% P value 0.006). There was no significant difference inthe endometrial thickness between the groups but it appears higher in hCG group(10.55±1.82 vs. 9.62 ± 1.87 in non-hCG group, p value 0.056). Non significantbut higher incidence of echogenic (luteinized) endometrium 48 hour post ovulationin hCG group (36/40 (90%) vs. 20/25 (80%) for non-hCG group p-value =0.288).Conclusions: The use of low-dose hCG after CC in the late follicular phase resultsin continued follicle growth, higher ovulation rate. This treatment offers anefficient and cost-effective alternative before gonadotropin therapy for this typeof patients.


Article
Occupational Radiation Exposure to Workers Used 18F-DG

Authors: A.A. Wabdan --- H.M. Yassin --- M.S. El- Nagdy1
Journal: Al-Mustansiriyah Journal of Science مجلة علوم المستنصرية ISSN: 1814635X Year: 2018 Volume: 29 Issue: 4 Pages: 100-105
Publisher: Al-Mustansyriah University الجامعة المستنصرية

Loading...
Loading...
Abstract

The increasing interest of medical institutes in the development of imaging services to include the hybrid system [Positron Emission Tomography combined with Computed Tomography (PET/CT)], this system is acquiring explosive growth due to its ability to accurately detect and stage many types of cancer and follow the progress of treatments. An increasing demand for use of (18F-FDG PET) in oncology has been the main reason for its growth. The physical characteristics of positron emissions result in higher radiation risk for staff and growing use of PET/CT for diagnostic purposes increase radiation exposure.The objective of this study was to estimate the radiation exposure to the medical physicists, technicians and nurses working in three Egyptian nuclear medicine institutes under our investigations, based on the whole body collective dose measured by thermoluminescent dosimeters (TLDs) and the effective dose per study received by medical staff were measured by electronic pocked dosimeters and the finger doses by ring dosimeter during a period of six months. The (mean± SD) dose measured per PET/CT procedure were (2.45±0.137, 3.22±0.218 and 1.69±0.11) μSv for the medical physicist, technician and nurse respectively. The (mean± SD) dose measured per MBq of 18F-FDG were (7.35±0.43, 9.73±0.66 and 5.13±0.33) nSv/MBq for the medical physicist, technician and nurse respectively. The (mean± SD) finger dose measured per 18F-FDGPET/CT scans were (179.9±24.94, 8.82±2.912 and 24.15±4.164) μSv for the medical physicist, technician and nurse respectively

Keywords

PET/CT --- Radiation Dose --- 18F-FDG.


Article
A Comparison between Low Dose and Standard Dose Computed Tomography Scan in Detection of Urolithiasis

Author: Ahmed Danoon Marsoul, Huda Ali Rasool1, Muhammed Ridha Judi
Journal: Medical Journal of Babylon مجلة بابل الطبية ISSN: 1812156X 23126760 Year: 2018 Volume: 15 Issue: 3 Pages: 258-262
Publisher: Babylon University جامعة بابل

Loading...
Loading...
Abstract

Background: Computed tomography (CT) (standard and low‑dose CT [LDCT] scan) has become the reference technique in medical imagingfor urinary calculi, to diagnose, plan treatment, and explore differential diagnosis of renal colic. Objective: This study was done to comparethe low‑dose nonenhanced CT scan with standard dose CT scan in the detection of urolithiasis. Materials and Methods: Cross‑sectionalstudy conducted from 2017 to 2018 in Al‑Hilla teaching general hospital on 60 patients undergone unenhanced (native) spectral detectorCT (SDCT) and LDCT, the patients were scanned by Siemens CT system, 64 slice using automated tube current modulation, all CT scan wereperformed without oral or intravenous contrast. Results: This study showed that 93 stones detected by SDCT scan and 89 stones detected byLDCT scan, mean age of patients 44.2 ± 7.3 and mean of body mass index 26.3 ± 3.1, male constitute 56.6% (34) and female 43.4% (26). In46.6% of patients had stone in the left side and 53.4% show stone in right side, most of patients presented solitary stone which appear 73.4%,11.6% of patients had double stone, 5% had triple stone, 6.6% had four stones, and 3.45% had 5 or more stone at investigation, 10.8% ofstones lie in ureter, 7.6% of stones in renal pelvis, 13.9% in upper calyx, 28% in lower calyx, and 39.7% lie in middle calyx, according tosize of stones 11.9% of stones had size <3 mm, 35.4% of stones range 3–5 mm, 34.5% size range 6–10 mm, 12.9% 11–15 mm in size, 3.25 ofstones had size range 16–20 mm and only 2.1% of stone had size >20 mm. In standard CT scan, the current mean was 283.2 while in LDCTscan the mean was 126.1 mA, sensitivity is (93%) and specificity (100%) of LDCT in reference SDCT. Conclusion: LDCT scans provideeffective methods of identifying and evaluating urinary tract stones, high diagnostic accuracy, sensitivity, and specificity are maintained despitesignificant radiation dose reduction compared to standard dose CT.


Article
Measurement of Percentage Depth Dose (PDD) for 6 MeV in water phantom and homogenous actual planning
قياس نسبة الجرعة العميقة (PDD) للطاقة (6 MeV) لوسط مائي مع التصميم العلاجي الحقيقي المتجانس للمرضى

Authors: Raghdah H. Hasan رغده حارث حسن --- Samar I. Essa سمر عمران عيسى --- Manwar A. AL-Naqqash منور عبدالاله النقاش
Journal: Iraqi Journal of Physics المجلة العراقية للفيزياء ISSN: 20704003 Year: 2018 Volume: 16 Issue: 37 Pages: 1-6
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Radiotherapy is the branch of clinical medicine concerned with the application of ionizing radiation in the treatment of disease. And it is used to killing of cancer cells in a tissue using ionizing radiation while keeping the sparing of healthy cells at acceptable level. X-ray beams are used to deposit absorbed dose at depth within a patient at the site of the tumor. The aim of this work is studying the relationship between the depth dose and the field size in water phantom and homogenous actual planning. In our work, the dose distribution at different depths (zero-18 cm) deep at1cm interval treated with field size (10×10 and 20×20) cm2 were studied.Results show that high similarity between water phantom and actual planning for this reason water is taken as phantom for Quality Assurance (QA) and calculation the depth dose. When increasing the field size, the percentage of surface dose increases that this could be caused by an increase of the amount of scattering in the larger fields. Conclusion: There is almost no difference in depth dose between homogenous planning and water phantom.

العلاج الإشعاعي هو فرع من فروع الطب السريري المعنية بتطبيق الإشعاعات المؤينة في علاج المرض. ويستخدم الإشعاع المؤين لقتل الخلايا السرطانية في الأنسجة مع الحفاظ على الخلايا السليمة عند مستوى مقبول. ويستخدم شعاع الأشعة السينية لترسيب الجرعة الممتصة في العمق داخل المريض في موقع الورم. الهدف من الدراسة هو دراسة العلاقة بين جرعة العمق والحجم في الوسط المائي والتصميم العلاجي المتجانس للمرضى تم دراسة توزيع الجرعة في أعماق مختلفة (0 - 18 سم) وللحجم (10 × 10 و 20 × 20) سم2.أظهرت النتائج التشابه الكبير بين الوسط المائي والتصميم العلاجي للمرضى لذلك تم استخدام الماء لحساب جرعة العمق. عند زيادة الحجم فان نسبة جرعة الأشعة تزداد على السطح وهذا يمكن أن يكون ناجما عن زيادة كمية تشتت الأشعة في الاحجام الكبيرة. من هذا البحث تم الاستنتاج انه لا يوجد تقريبا أي فرق في جرعة العمق بين التخطيط الفعلي المتجانس للمرضى والوسط المائي.


Article
Measurement of Radon Gas Concentrations and Hazard Effects in Underground Water Samples in Karbala Governorate of Iraq

Authors: A.A. Hasan --- I.T. Al-Alawy
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 2 Part (C) Pages: 118-122
Publisher: University of Technology الجامعة التكنولوجية

Loading...
Loading...
Abstract

One of the most characterizations of social health is the existenceavailability of sources irrigation water. Since the main source of water,contamination is radon gas. Six regions in Karbala province in Iraq werechosen to evaluate Radon level in underground water-samples by using(SSNTD-CR-39) Detector. The current measurements showed that highestlevel was in Al-Horr region to be 4.152±2.2Bq/L, where lowest concentrationwas in Hay-Rumdan 2.165±1.6Bq/L. The maximum Annual-Effective Dose(AED) was found in Al-Horr to be 14.34±3.5µSv/y, whereas the minimal valueindicated at Hay-Rumdan 8.66±3.1µSv/y. In general, it has been found thatRadon-level concentration, in the studied groundwater-samples, was less thanallowed permissible value 11.1Bq/L and annual effective-doses were below therecommended international value 1mSv/y. Therefore, groundwater in allunderground water studied in Karbala province is safe where the focus ofradon obsession is not a public concern


Article
Biosynthesis , Characterization and Removal Efficiency for Petroleum Leakage of the Cofe2o4 Nanoparticles

Authors: Haydar Matz Muhy --- Fatih Duman
Journal: Al-Mustansiriyah Journal of Science مجلة علوم المستنصرية ISSN: 1814635X Year: 2018 Volume: 29 Issue: 3 ICSSSA 2018 Conference Issue Pages: 21-28
Publisher: Al-Mustansyriah University الجامعة المستنصرية

Loading...
Loading...
Abstract

Magnetic nanoparticles are widely used in areas such as biosensors, data storage devices, waste water treatment and biomedicine due to their biocompatibility and low toxicity. In this study, biosynthesis of the CoFe2O4 nanoparticle (NP) was carried out using the bark extract of Aesculus hippocastanum plant as a reducing and capping agent. Synthesized NPs were char-acterized by ultraviolet-visible spectrophotometer (Uv-Vis.), Dynamic Light Scattering (DLS), zeta load, X-Ray Dust Diffraction (XRD), Fourier Transformed Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy, Raman, BET, and Thermogravimetric Thermal Analysis (TGA). The Lethal dose value (LD50) and the crude oil removal efficiency were examined. The characteristic light absorption of the CoFe2O4NP has been measured at 330 nm, surface charge of +14.4 mV, mean size of 75 nm and effective diameter of 432 nm. The XRD analy-sis revealed that the particle structure was in the cubic spinel structure with functional groups bound by FT-IR analysis and Raman data. It has been noted that the CoFe2O4NP, which was synthesized by biological method, can remove a 78.5% of the crude oil from the contaminat-ed water. It has been determined that the NP’s have a low toxic effect on D. magna (LD50= 728.267 ppm). In this study, it has been suggested that the CoFe2O4 NP with A. hippocasta-num bark extract could be synthesized by a cheap, relatively easy and environmentally friendly method which used for purification of contaminated water bodies.


Article
The Use of Alpha and Gamma Spectroscopy to Determine the Annual Dose Due to Consumption of some Food Materials Containing lead Isotopes 210Pb and 214Pb
استخدام كل من مطيافية الفا وكاما في تحديد الجرعة السنوية الناجمة عن تناول بعض المواد الغذائية الحاوية على نظائر الرصاص 210Pb و214Pb

Authors: Assima M. Al-Emam عاصمة محمود الإمام --- Ahmed K. Mheemeed احمد خلف محيميد
Journal: Rafidain journal of science مجلة علوم الرافدين ISSN: 16089391 Year: 2018 Volume: 27 Issue: 1A Pages: 145-157
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

The current study aims to determine the radioactivity concentrations of 210Pb and 214Pb isotopes in food used by Iraqi people. Thirty four samples were collected, some are produced inside the country and others are imported and available in local markets at some Iraqi governorates, these foods are Potatoes, wheat, milk and fishes. To estimate the radioactivity concentration of 210Pb, the chemical separation method was used and 210Pb and 214Pb isotopes were deposited on silver disks. Alpha spectroscopy was used to find the spectrum of alpha particles emitted from 210Pb and 214Pb isotopes. Gamma ray spectroscopy was used to determine the radioactivity concentration of 214Pb. The annual intake and radiation dose due to the consumption of foods containing 210Pb and 214Pb isotopes were calculated. The total annual dose from the ingestion of 210Pb and 214Pb isotopes in foods are 99.01 μSv/y and 22.49 nSv/y, respectively

تهدف الدراسة الحالية إلى تحديد تركيز النشاط الاشعاعي لنظائر الرصاص 210Pb و214Pb في بعض الأغذية التي يستهلكها الفرد ألعراقي حيث جمعت (34) عينة من بعض المحافظات العراقية منها المنتجة داخل القطر ومنها المستوردة والمتوفرة في الأسواق المحلية. شملت هذه الأغذية البطاطا والحنطة والأسماك والحليب. ولإيجاد تركيز النشاط الاشعاعي للرصاص 210Pb، استخدمت طريقة الفصل الكيميائي وترسيب البولونيوم 208Po و 210Poعلى أقراص الفضة. واستخدمت مطيافية ألفا لإيجاد طيف تلك الجسيمات المنبعثة من نظائر البولونيوم 208Po و 210Poفضلا عن استخدام مطيافية أشعة كاما لإيجاد تركيز النشاط الاشعاعي للرصاص 214Pb. تم حساب مقدار التناول اليومي والجرعة السنوية الناتجة من تناول الأغذية التي تحتوي على نظيري الرصاص 210Pb و 214Pb. أشارت النتائج بان الجرعات السنوية الكلية نتيجة تناول المواد الغذائية قيد الدراسة هي بحدود 99.01 μSv/y و 22.49 nSv/y لنظائر الرصاص 210Pb و 214Pb على التوالي.

Listing 1 - 10 of 13 << page
of 2
>>
Sort by
Narrow your search

Resource type

article (13)


Language

English (10)

Arabic (2)


Year
From To Submit

2018 (13)