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Article
Effect of Different Refrigerant Injection Techniques on Heat Pumpcycle Performance
تأثير حقن مائع التثليج بتقنيات متعددة على اداء مضخة حرارية

Authors: Abdual Hadi N. Khalifa --- Johain j. faraj --- Anmar Adnan
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2014 Volume: 32 Issue: 10 Part (A) Engineering Pages: 2576-2586
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Refrigerant injection techniques are considered as modifications to vapor compression refrigeration systems to improve the performance of these systems when operating at high or low ambient temperatures. In this study a liquid and vapor refrigerant injections were implemented using heat exchangers arrangement. An investigation to the effects of these techniques on the performance of refrigeration cycle was conducted. A decrease in discharge temperature was obtained using hybrid injection cycles from 20% to 19% when the ambient temperature varies from 14C to 8C. Also the decrease in pressure ratio varied from 24% at an ambient temperature of 14C to 18% at 8C. The enhancement in performance factor varied from 35% at 14 C to 28% at 8 C.

تعد تقنية حقن مائع التثليج احد انوع التحويرات التي تم اجراءها على منظومة التثليج الانضغاطية، وخاصة تلك التي تعمل عتد ظروف جوية قاسية ذات درجات حرارة مرتفعة جدا او منخفضة جدا. استخدمت تقنية حقن سائل او بخار مائع الثليجباستخدام بعض المبادلات الحرارية. وتم اجراء دراسة استقصائية لمعرفة تأثير هذه التقنية على معامل اداء مضخة حرارية. ومن خلال النتائج العملية يمكن القول ان استخدام تقنية الحقن الهجينة ( حقن سائل وبخار مائع التثليج في وقت واحد) يمكن ان تقلل درجة حرارة بخار التجهيز بمقدار 19 الى 20% عن تغير درجة حرارة المحيط من 14 الى 18 درجة مئوية. في حين ان انخفاض ضغط الدفع تراوح من 14 الى 18% عند درجة حرارة خارجية تساوي 8 درجات مئوية. وتراوح التحسين في 35% عند درجة حرارة خارجية تساوي 14 درجة مئوية الى 28% عند درجة حرارة خارجية تساوي 8 درجات مئوية.


Article
The effect of sulcular injection of meloxicom on biochemical parameter of rabbit

Authors: Hashim D. Musa هاشم موسى --- Lekaa M. Ibrahim لقاء ابراهيم
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 4 Pages: 88-91
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Meloxicam is an NSAID of the oxicam class that acts by inhibiting prostaglandin synthesis and inducibleCOX-2, thereby exerting anti-inflammatory effect. This study aimed to evaluate the level of alkaline phosphetase andhigh sensitivity C - reactive protein as response to sulcular injection of meloxicom using a rabbit model.Material and method: Forty five male rabbits of the same species were divided into three groups. Group 1 whichincluded 20 rabbits that injected with meloxicon in a dose equal to the human therapeutic dose /kg .Group 2 whichincluded 15 rabbits that injected with normal saline. Group 3 which included 10 rabbits used as control group. Five mlof blood was collected from the rabbits ear vien for biochemical analysis at deferent time interval. Biochemicalanalysis included alkaline phosphetase (ALP) which analyzed by using Biolabo kit and High sensitivity C- reactiveprotein (hs- CRP) was measured using ELISA technique.Results: The result showed that the level of ALP after 1 day of sulcular injection in group 1 was 101.25 then it wasdecrease to 97.50 after 14 days while mean of ALP in group 2 was 70.33 After 1 day of injection and reach to 74.67After 14 days and this almost near to the mean value of control groupStatistic description of hs-CRP for group 1 was decreased. The mean value from 11.617 after 1 day to 3.639 after 14days. For group 2 also there was decreased in the mean from 11.556 after 1 day to 3.536 after 14 days, while for thecontrol group the mean value was 3.170 .Conclusions: The sulcular injection of NSAIDs seems to be of particular interest. This may help to further reduceadverse systemic effects of NSAIDs in treatment of periodontal disease safely.


Article
The palatal injection: A painless approach

Authors: Wafaa KH FATHIE --- Tahani A AL-SANDOOK --- Rayan S HAMID
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2001 Volume: 1 Issue: 3 Pages: S379-S384
Publisher: Mosul University جامعة الموصل

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Abstract

A painless approach to the well known painful palatal injection using topical application of pressure is described. Seventy dental patients requiring anesthesia of the palatal tissue (soft and hard) for:surgical procedures were chosen for the study. A highly significant value (p>0.01) of a painless injection was noticed when the ipsilateral side was compared with the contralateral side in the same patient. Further studies on this approach are recommended to further evaluate its success.


Article
Isolation of some microorganisms from Iraqi patients with chronic maxillary sinusitis.

Authors: Suhaila M. Al-Salloum --- Sarmad M. Zeiny
Journal: Journal of the Faculty of Medicine مجلة كلية الطب ISSN: 00419419 Year: 2007 Volume: 49 Issue: 1 Pages: 138-143
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Maxillary sinusitis is one of the most common infections of humans. Sinusitis can be defined as an inflammation of the membrane lining of any sinus, especially one of the paranasal sinuses. Objective: To determine the causative microorganisms of chronic maxillary sinusitis. Patients: Forty five chronic sinusitis patients were involved in the present study. Methods: Sampling method were sinus specimens (aspiration or injection aspiration). Results: Haemophilus species, Streptococcus pneumoniae (S.pneumoniae) and Moraxella catarrhalis (M.catarrhalis) were the most frequent isolates; in addition Penicillium and Cladosporium species were isolated from some chronic sinusitis patients. Conclusion: Chronic sinusitis could be caused by either bacterial species or by fungal species; most bacterial isolates were Haemophilus species followed by S.pneumoniae and M.catarrhalis. The incidences of chronic sinusitis were more at patients age (20-29 years) old groups.


Article
The Influence of Water Injection on Two - Shaft Gas Turbine Performance with Regeneration
تأثير حقن الماء على أداء محرك توربيني ثنائي المحور مع أعادة التوليد

Author: Muthana K. Aldoory
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2010 Volume: 28 Issue: 2 Pages: 416-430
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

A two-shaft gas turbine type GT-85-2-H has been modified and convertedinto a research unit. The main modifications consist of incorporating regenerationsystem and water spray system in the inlet air duct of the GT-85-2-H gas turbine.The influence of regeneration and water injection in the air intake on gas turbineperformance has been studied. The results show that regeneration improves thethermal efficiency by about 56% due to reduction in the fuel consumption, andreduces the power output due to back pressure losses that occur because of theregenerative system by about 20.67%.The brake specific fuel consumption isreduced by about 59%.Water injection strongly affects the power output. Water injection tends toincrease the brake power output by about 47%.The thermal efficiency is alsoincreased by about 30%.The specific fuel consumption is reduced by about 29%.

وتحويله إلى وحدة بحثية. GT-85-2-H تم تحوير محرك توربيني ثنائي المحور من نوعالتحويرات الرئيسية تضمنت اضافة منظومة اعادة التوليد ومنظومة تذرية المياه في مدخلالتوربيني. كما تم دراسة تأثيرات إعادة التوليد وحقن GT-85-2-H ضاغط الهواء لمحركالماء على أداء التوربين الغازي. اظهرت النتائج أن أعادة التوليد يحسن الكفاءة الحرارية بحوالي56% بسبب الانخفاض الحاصل في استهلاك الوقود ويقلل القدرة الخارجة بسبب خسائر الضغطالرجعي الحاصلة بسبب منظومة اعادة التوليد وبحوالي % 20.67 كما تم تقليل استهلاك الوقودالنوعي وبحوالي % 59 . حقن الماء يؤثر وبصورة كبيرة على القدرة الخارجة حيث يميل إلىزيادة القدرة الخارجة وبحوالي % 47 . الكفاءة الحرارية ازدادت أيضاً وبحوالي % 30 كما تم. تقليل استهلاك الوقود النوعي وبحوالي % 2


Article
Monitoring Electrophilic Substitution for Determination of Amino Compounds by Flow Injection Chemiluminescence Methods
رصد التعويض الالكتروفيلي لتقدير المركبات الأمينية بواسطة طريقة تحليل الحقن الجرياني – البريق الكيميائي

Author: Diyar Salahuddin Ali ديار صلاح الدين علي محمد
Journal: Tikrit Journal of Pure Science مجلة تكريت للعلوم الصرفة ISSN: 18131662 Year: 2009 Volume: 14 Issue: 3 Pages: 42-48
Publisher: Tikrit University جامعة تكريت

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Abstract

Flow injection chemiluminescence procedure is described for determination of some amino compounds, based on their reaction with bromine produced from reaction of bromate/bromide mixture in acidic medium. Some bromine is consumed and the rest catalyze the chemiluminescence intensity of luminol/H2O2 system. The flow injection chemiluminescence methods with merging zone principle were conducted instantly through an on-line design. Sampling rate was 95 s.h-1 . Amino compounds such as aniline, 1-naphthyl amine, o-anisidine, 2-methyl aniline and acryl amide were determined and best working conditions for their determinations were optimized. Linear calibrations of these compounds were in the range 1x10-7 – 1x10-2 M with correlation coefficients of (0.989), (0.985), (0.992), (0.997) and (0.980) respectively.

تم وصف طريقة جديدة متطورة لتقدير مركبات الآمين بتقنية تحليل الحقن الجرياني- البريق الكيميائي باستخدام تقنية اندماج المناطق على أساس تفاعلها مع محلول البروم الناتج من تفاعل البروميد مع البرومات في الوسط الحامضي. سرعة التقنية بلغت 95 أنموذج / ساعة . من المركبات الأمينية التي استخدمت في هذه الطريقة مركبات الانيلين , أورثوأنيسدين , 2- ميثيل أنيلين , 1- نفثيل أمين و أكريل أميد . تم الحصول على مديات مستقيمة لمنحنيات المعايرة بين 1x10-2 – 1x10-7 مع معاملات التغير 0.989 , 0.985 , 0.992 ,0.997 و 0.980 على التوالي.


Article
13- THE ROLE OF PHENOL INJECTION IN THE TREATMENT OF PILONIDAL SINUS DISEASE

Author: Qais K Baqirim
Journal: Basrah Journal of Surgery مجلة البصرة الجراحية ISSN: 16833589 / ONLINE 2409501X Year: 2009 Volume: 15 Issue: 1 Pages: 78-80
Publisher: Basrah University جامعة البصرة

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Abstract

The aim of this study was to determine the impact of phenol injection on the outpatienttreatment of the sacrococcygeal pilonidal sinus disease. A prospective analysis was taken offorty patients between June 2002 to June 2006 as an outpatient. Age, sex, state of sinuses atinitial presentation & the recovery time was analyzed. Phenol injection applied on 40 patients,37 males & 3 females. Forty percent of the patients required one injection while 55 % of thepatients had two applications. The recovery time was between 1-3 months. Recurrence wasobserved in 15% (6 patients). Phenol treatment is simple, easy & inexpensive method that canapplied on an outpatient basis, decreasing both recurrence rate & the morbidity.


Article
A Clinical Evaluation of the Periodontal Ligament Injection

Author: Rayan S Hamid
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2012 Volume: 12 Issue: 2 Pages: 356-362
Publisher: Mosul University جامعة الموصل

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Abstract

ABSTRACTAims The periodontal ligament injection in isolated areas of the mandible was clinically evaluated us-ing only a conventional dental cartridge syringe. Materials and Methods: One hundred subjects requir-ing extractions of either premolars or molars participated in the study. Results: A high percentage of success rate (85%) was achieved but with unfavorable comment from the patient in regard to a painful injection. Duration of surgical anesthesia following the injection proved to be adequate in almost all extractions performed. Conclusions: New devices for performing this injection appear to have some advantage over the conventional syringe technique. However, these devices were unfortunately unavail-able at the area of study. Further studies are recommended to further evaluate its success and also to determine the response of both the periodontal ligament and pulpal tissue in cases were restorative treatment of teeth is to be undertaken for example crowns, bridges and fillings


Article
A simple Flow Injection-Spectrophotometric Determination of Copper(II) using 4-(6-bromo-2-benzothiazolylazo) Pyrogallol as chromogenic agent

Authors: N.A.Nasser --- D.N.Taha --- K.H.Kahdim
Journal: Journal of University of Babylon مجلة جامعة بابل ISSN: 19920652 23128135 Year: 2013 Volume: 21 Issue: 7 Pages: 2544-2554
Publisher: Babylon University جامعة بابل

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Abstract

A simple and facial flow injection method coupled with spectrophotometer detection was developed to determination of copper(II). The FIA system based on the reaction of Copper (II) with 4-(6-bromo-2-benzothiazolylazo) pyrogallol (4-Br-BTAP) at pH 5.8 with an absorption maximum at 570 nm. The optimum FIA variables were investigated. The proposed method has a linear calibration range 0.01-7.0 μg.mL-1 of copper(II) with the regression whereas the observed detection limit was 0.008 μg.mL-1 and the percentage of recovery of 103.64%. The proposed method was shown good precision with relative standard deviations was 0.96%. The sampling frequency was 120 determinations per hour. The method has been applied to the determination of copper in filling and metallic wire.

طريقة حقن جرياني بسيطة وسهلة تم دمجها مع الطريقة الطيفية لتقدير ايون النحاس الثنائي .ان نظام الحقن الجرياني يعتمد على تفاعل ايون النحاس الثنائي مع الكاشف العضوي 4-(6-برومو-2-بنزوثيازوليل ازو) بايروگالول(4-Br-BTAP) عند pH=5.8 وعند الامتصاص الاعظم 570 نانومتر. متغيرات الطريقة المتبعة بالحقن الجرياني تم دراستها. مدى الخطية لمنحنى المعايرة كان بحدود 0.01-7.0 مايكروغرام. مل-1 من ايون النحاس الثنائي, وان قيمة حد الكشف كانت 0.008 مايكروغرام. مل-1, ونسبة الاستيعادية %103.64 . الطريقة المقترحة ذات دقة عالية إذ ان قيمة الانحراف المعياري النسبي تساوي %0.96 . معدل قياس النماذج بالساعة كان 120 تقدير بالساعة. تم تطبيق الطريقة لتقدير النحاس في حشوة اسنان وسلك معدني.


Article
Application of Factorial Design for Optimization of Flow-Injection Spectrophotometric Determination of Tetracycline in Some Pharmaceutical Formulations
تطبيق تصميم المضروب لإيجاد الظروف المثلى للحقن الجرياني المطيافية الضوئية لتقدير التتراسايكلين في بعض التركيبات الدوائية

Author: Chinar Mohammed Risheed جنار محمد رشيد
Journal: Tikrit Journal of Pure Science مجلة تكريت للعلوم الصرفة ISSN: 18131662 Year: 2013 Volume: 18 Issue: 3 Pages: 56-62
Publisher: Tikrit University جامعة تكريت

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Abstract

A simple and rapid flow injection (FI) spectrophotometric procedure for the determination of tetracycline (TC) has been developed. The method is based on the injection of 150 μl standard or sample solution into a distilled water carrier stream which merged at the merging zone with ferric nitrate solution with the optimum flow rate of 1.5 mL/min, subsequently the reaction will occur inside the reactor coil, forming brown color product that monitored at 418 nm. The flow injection experimental conditions were optimized by means of full factorial design. Under the optimum conditions, calibration graph was obtained over the range 2.0-120 μg/ml with a detection limit of 1.0 μg/ml. The correlation coefficient and molar absorptivity were 0.9994 and 4.343x103 L/mol.cm respectively. The results showed a good precision and accuracy. The method was successfully applied to the determination of tetracycline in pharmaceutical formulations and showed good agreement with those obtained by the standard method at 95% confidence level, with a sample throughput of 60/h.

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