research centers


Search results: Found 100

Listing 1 - 10 of 100 << page
of 10
>>
Sort by

Article
The effect of training costs on the quality of products according to ISO 10015
] اثر كلف التدريب على نوعية المنتجات بموجب المواصفة القياسية ISO10015

Author: منال جبار سرور
Journal: Al-Rafidain University College For Sciences مجلة كلية الرافدين الجامعة للعلوم ISSN: 16816870 Year: 2008 Issue: 22 Pages: 15-39
Publisher: Rafidain University College كلية الرافدين الجامعة

Loading...
Loading...
Abstract

The research aims to measure the effect of training costs on the quality of products for Babil liquid batteries plant NO.(1) through out the training courses costs that are held inside and outside the factory , and to show the training affect for better quality performance to reduce the number of defected units. The hypothesis of this research " Expending on quality training according to well planned training courses will decrease the defective units number & costs & reducing the production costs to get better profits and to increase the company,s share market " . Some statistical methods were used to analyse the failure causes in the productive divisions , and these methods are " paretto analyse " & " cause & effect diagram " to show the main reasons for the arising of defects to cure them and to reach the required quality for the units.

هدف البحث الى قياس اثر كلف التدريب على النوعية لمعمل بابل (1) للبطاريات السائلة من خلال كلف الدورات التدريبية المقامة داخليا وخارجيا وبيان اثر التدريب على تحسن الاداء النوعي للانتاج بتقليل عدد الوحدات المعابة واستند البحث الى فرضية مفادها " ان الانفاق من اجل التدريب على النوعية بموجب دورات تدريبية مخطط لها يؤدي الى تخفيض عدد الوحدات المعابة وكلفها وتخفيض كلف الانتاج وتحسين الارباح وزيادة حصة الشركة بالسوق . وقد تم اعتماد بعض الاساليب الاحصائية لتحليل اسباب الفشل بالاقسام الانتاجية كتحليل باريتو ومخطط السبب والتأثير للوقوف على الاسباب الرئيسية في ظهور العيوب لمحاولة معالجتها والوصول بالمنتجات الى مستوى المطابقة للمواصفات .


Article
Effect of Adding some Additives and Drying Method on Compressive Strength of Gypsum Products

Authors: Wael Abdul Razak وائل عبد الرزاق --- Ihab N. Yassin ايهاب ياسين --- Firas Abd Kati فراس عبد كاطع
Journal: Tikrit Journal for Dental Sciences مجلة تكريت لعلوم طب الاسنان ISSN: 20731213 Year: 2017 Volume: 5 Issue: 2 Pages: 25-32
Publisher: Tikrit University جامعة تكريت

Loading...
Loading...
Abstract

Gypsum products (dental plaster and stone) are widely used indentistry. However, the main problem with any gypsum productsis reproduction of fine details and dimensional stability. Thecurrent study was conducted to assess the effect of incorporatingvarious additives (i.e. cured resin, pulverised stone, pulverisedplaster, and glass fibers) and drying method on compressivestrength of gypsum products. A total of 160 specimens weredivided into 2 groups according to the method of drying (air andmicrowave). For each drying method, each group was subdivideddepending on the type of material used into 2 groups; dentalplaster and dental stone. Variuos additives were used forreinforcement; cured resin, pulverised plaster, pulverised stone,and glass fibers. The unmodified group was considered as control.The specimens were dried and the compressive strength test wasapplied on all specimens. All specimens' data were statisticallyanalysed via ANOVA, Tukey and independent T tests.Thecompressive strength of gypsum products was significantlyinfluenced by the type of additive used. The specimens reinforcedwith glass fibers, cured resin, pulverised plaster, and stone had agreater value of mean compressive strength compared withunmodified groups. Statistically, highly significant differenceswere observed among all dried groups (P≤0.001). As well, themicrowave specimens were more resistant to compressiveloadings than air dried specimens. No significant differences,however, were recorded between the two drying methods(P>0.05).The glass fibers have a significant effect on compressivestrength of gypsum products. The pulverised particles and curedresin can be added at 1 % by weight to enhance the mechanicalproperties of plaster and stone. Microwave drying for 5 minutescan fasten the drying time and permit early manipulation of plasterand stone models.


Article
22- RESIDUAL DISTRIBUTION OF LEAD, CHROMIUM AND COBALT IN DAIRY PRODUCTS AND THEIR BY-PRODUCTS MANUFACTURED FROM MILK SPIKED WITH THESE METALS

Author: Hiba S. Al-Naemi
Journal: Basrah Journal of Veterinary Research. مجلة البصرة للابحاث البيطرية ISSN: 18138497 Year: 2018 Volume: 17 Issue: 1 Pages: 257-276
Publisher: Basrah University جامعة البصرة

Loading...
Loading...
Abstract

The research study the distribution patterns and residues behavior of Pb, Cr and Cobetween dairy products [yoghurt, cheese and fatty dairy products ( kishfa, Gaymer andcream)] and their by-products (whey and skim milk) manufactured fromexperimentally polluted raw ewe̓ s, buffalo̓ s and cow̓ s milk were investigated usingAtomic Absorption Spectrophotometer (AAS). The studied metals (Pb, Cr and Co)were concentrated in both cheese and fatty dairy products (kishfa, gaymer and cream)as they recorded concentration factors in cheese produced from raw ewe̓ s, buffalo̓ sand cow̓ s milk of 3.849, 3.466 and 2.452, 3.804, 2.938 and 2.342 and 2.995, 2.682and 2.336 folds, respectively and 3.693, 3.164 and 2.339, 3.347, 2.773 and 2.242 and2.601, 2.156 and 2.14 folds, respectively in kishfa, gaymer and cream produced fromraw ewe̓ s, buffalo̓ s and cow̓ s milk compared with metals concentrations reported inraw milk used for preparing these products, whereas the by-products of cheese andfatty dairy products processing (whey and skim milk, respectively) contained Pb, Crand Co concentrations lower than these present in raw milk as they recorded reductionlevels of 71.6, 58 and 31.7, 63.7, 39.5 and 27 and 31.4, 20 and 9.5%, respectively inwhey and 37.3, 29.9 and 12.1, 41.7, 27 and 19.3 and 21.3, 7.8 and 5.2%, respectivelyin skim milk. Yoghurt processed from the raw ewe̓ s, buffalo̓ s and cow̓ s milkcontained Pb, Cr and Co metals at mean concentration levels similar to and slightlyless than those found in raw milk as the reduction levels amounted 0, 0.6 and 1, 0.1,0.7 and 1.4 and 0.6, 0.8 and 1.9%, respectively. Generally, metals exhibited significantdifferences (p˂0.05) in their distribution and residues behavior in dairy products andtheir by-products and comparable to raw milk used in processing as they arranged as follows: cheese> fatty dairy products (kishfa, Gaymer and cream)> raw milk>yoghurt> skim milk> whey, except yoghurt and raw milk which difference was notsignificant (p˂0.05). Also, metals found in studying dairy products in the order of Pb >Cr > Co, in contrast to their by-products as they arranged reversibly. Finally, metalsconcentrated in cheese and kishfa produced from raw ewe̓ s milk, in addition to cheeseand gaymer produced from raw buffalo̓ s milk at levels significantly higher (p˂0.05)than those present in cheese and cream produced from raw cow̓ s milk.

Keywords

Lead --- Chromium --- Cobalt --- Dairy products.


Article
Neutron Yield From Gamma Ray Incineration of Radioactive Fission Products
الحصيلة النيوترونية الناتجة من أحراق نواتج الأنشطار المشعة بأشعة كاما

Loading...
Loading...
Abstract

The neutron flux in this paper, which is generated as a result of γ incineration of the radioactive fisssion products isotopes has been evaluated .It is obvious from this paper that the neutron flux value depends on the number of incineration nuclei and the nuclear cross-section of the incinerated isotopes, and the neutron flux is directly dependent on γ-ray flux. The neutron flux increases from 1010to 1017n/s.gm as the irradiation flux increases from 1016to 1020 γ/cm2.s. It is concluded that the γ-incineration technique can be used to produce a switchable neutron source of high flux.

في هذا البحث تم حساب فيض النيوترونات الناتجة من احراق المخلفات المشعة الناتجة من التفاعل الانشطاري.اوضحت النتائج بان فيض النيوترونات يعتمد على عدد النوى المحترقة وعلى مساحة المقطع العرضي للتفاعل كذلك تبين ان فيض النيوترونات الناتجة بسبب الحرق يتناسب طرديا مع فيض كاما المستخدم لتشعيع النظائر حيث يزداد فيض النيوترونات من 1010الى 1017نيوترون/ثانية 0غرام عندما يزداد اشعة كاما من 1016الى 1020كاما/سم2..ثانية وعليه يمكن اعتبار هذه التقنية كمصدر نيوتروني ذو فيض عالي يمكن التحكم والسيطرة عليه


Article
Evaluation of some adhesive materials for repairing gypsum models

Author: Radhwan H Hasan
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2005 Volume: 5 Issue: 6 Pages: 185-191
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

The aim of this study was to evaluate some adhesive materialsthat are used in dentistry for repairing of gypsum cast.The specimens were prepared with dimensions 121×16×10mm length, width and thickness, respectively. The total numberof specimens was 96 (48 specimens for dental plaster,while the other 48 specimens were for dental stone). The lengthof each specimen was measured and recorded on its surface,then the specimens were fractured into two pieces and reattachedtogether with one of the three adhesive materials, reattachmentwas done either immediately (time= 0) or after 4minutes of adhesive application. These specimens were dividedinto six groups for each gypsum product, which involved:Group 1: Control, unrepaired specimens; group 2: Polycarboxylatecement, time= 0; group 3: Polyacrylic acid solution,time= 0; group 4: Polyacrylic acid solution, time= 4 minutes;group 5: Cyanoacrylate adhesive, time= 0; group 6: Cyanoacrylateadhesive, time= 4 minutes. The length of each specimenwas measured again and differences in length for each repairedspecimen was measured. Then all specimens were subjectedto the flexure of transverse strength test. Data were analyzedusing analysis of variance and Duncan’s Multiple RangeTest.The results indicated that using of cyanoacrylate adhesive,time= 0 and polyacrylic acid solution, time = 4 minuteshad significantly higher transverse strength providing maximumadhesion for each gypsum product. The results of this studyalso showed that there were dimensional changes with polycarboxylatecement adhesive and such changes not observedwith cyanoacrylate and polyacrylic acid solution adhesives.


Article
The effect of infestation by Red-Rust Flour Beetle Tribolium castaneum Hbst. on the quality of Flour and Its Products.
تأثير الإصابة بخنفساء الطحين الصدئية الحمراءHbst. Tribolium castaneum على نوعية الطحين والمواد المصنعة منه

Author: O.S. Mohammad أسامة سعيد محمد
Journal: Tikrit Journal for Agricultural Sciences مجلة تكريت للعلوم الزراعية ISSN: 18131646 Year: 2012 Volume: 12 Issue: 4 Pages: 132-136
Publisher: Tikrit University جامعة تكريت

Loading...
Loading...
Abstract

Abstract The results showed that there were significant differences in the numbers of the rust-red flour beetle Tribolium castaneum among dealings of the three treatments: 2, 3 and 4 pairs of the beetle / 0.5 kg flour, after a period of 3 months of infection, which was reflected on the properties of flour in general and when compared with uninfected sample in different qualities covered by the sensory evaluation form approved by the American Institute of baking showing a significant decrease of the loaf volume , specific volume and also taste, colour and smell of the pulp , chewing and textures in addition to colour of the crust . These pairs of the 3 treatments has produced large numbers of insect individuals : larvae and pupae and adults, resulted in 147, 268 and 316 individuals respectively , it was found that the size of loaf made from healthy flour sample increased than the size of the plant samples infected about 37.5%. For the color and crust appearance the healthy sample of dough showed 30-48 % exceeds than the infected samples. With respect to internal characteristics the color of the pulp, smell and taste surpassed the sound sample of 38.5% - 45.5%, 59-84% and 74-157% respectively. For the two recipe of chewing and strength 57-62% and 87-122 % for the three treatments. In total, the external and internal characteristic of the sample outperformed the sound samples infected by about 54% comparing with the 1st treatment till to 70 % for the 3rd treatment... As the proportion of gluten of samples infected weak compared amounted to treatment the first 25% and for the second 23% and the third 22%, while in comparison, 32%, resulting in recipes desirable loaf manufactured from the infected flour of the three treatments.

الخلاصة أظهرت نتائج الدراسة وجود اختلاف معنوي واضح في أعداد خنفساء الطحين الصدئية الحمراء بمعاملاتها الثلاث زوجين وثلاثة وأربعة أزواج / نصف كيلوغرام طحين بعد فترة 3 أشهر من العدوى الصناعية ومقارنة بالعينة السليمة مما انعكس على خواص الطحين ومواصفاته بشكل عام في الصفات التي شملتها استمارة التقييم الحسي المعتمدة من قبل المعهد الأمريكي للتخبيز كالحجم والحجم النوعي ولون وصفة القشرة وطعم ولون ورائحة اللب والمضغ والقوام ، وقد أنتجت الأزواج من الحشرات أعداد كبيرة من اليرقات والعذارى والكاملات خلال فترة التجربة، إذ نتج عنها 147 فرد من المعاملة الأولى و287 فرد من الثانية و316 فرد من الثالثة ، مما نتج عنه تأثيرات معنوية وواضحة لكثير من الصفات الحسية للوف المصنع منها مقارنة بالطحين غير المصاب، فقد وجد أن حجم اللوف المصنع من طحين العينة السليمة تفوق بنسبة 37.5 % على حجمه المصنع من العينات المصابة وفي صفة لون القشرة تفوقت العينة السليمة على المصابة بنسبة 75 %، وفي صفة التحبب بنسبة تراوحت بين 30 – 48 %، وقي صفات لون اللب ورائحته وطعمه بنسبة تراوحت بين 38.5 – 45.5 % و 59 – 84 % و 74 – 157 % على التوالي وفي صفتي المضغ والقوام تراوحت النسبة بين 57 – 62 % و 87 – 122 % للمعاملات الثلاثة، وفي المجموع العام للصفات الداخلية والخارجية تفوقت العينة السليمة على العينات المصابة بنسبة تراوحت من 54% في المعاملة الأولى وحتى 70 % في المعاملة الثالثة. كما كانت نسبة الكلوتين للعينات المصابة ضعيفة مقارنة بالسليمة وبلغت 25 % و 23% و 22 % للمعاملات الثلاثة على التوالي بينما كانت في المقارنة 32 % ، مما نتج عنه صفات غير مرغوبة من قبل المستهلك للوف المصنع من الطحين المصاب في المعاملات الثلاثة.


Article
Properties of High Performance Self Compacting Concrete Continuously Exposed in Oil Products
خواص الخرسانة عالية الاداء والذاتية الرص المعرضة للمشتقات النفطية

Authors: Shaker.A.Al-Mashhadany --- Wasan Ismail Khalil --- Ali Adel Ali
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2014 Volume: 32 Issue: 8 Part (A) Engineering Pages: 2030-2055
Publisher: University of Technology الجامعة التكنولوجية

Loading...
Loading...
Abstract

Self compacted concrete (SCC) is a new generation of concrete. Its behavior after exposure to oil products is still unknown. This investigation includes producing SCC and investigate its properties after different exposure periods (28,60,90,120,150 and 180 days) to water or different oil products (crude oil, gas oil , motor oil and fuel oil ). The mechanical properties (compressive strength, splitting tensile strength, modulus of rupture and static modulus of elasticity) and dynamic properties (Ultrasonic pulse velocity and dynamic modulus of elasticity), length change, total absorption and density of SCC were studied. The results show that compressive strength, splitting tensile strength, modulus of rupture and static modulus of elasticity, ultrasonic pulse velocity, dynamic modulus of elasticity and density for SCC specimens continuously exposed to water are increase as the exposure period increased. Generally the results indicate a reduction in all these properties as the exposure period to oil products increased.

تعتبر الخرسانة ذاتية الرص جيل جديد من الخرسانة ومازال سلوكها بعد التعرض للمشتقات النفطية غير معروف. يتضمن البحث إنتاج خرسانة ذاتية الرص و التحري عن خواصها بعد تعرضها لفترات مختلفة (180,150,120,90,60,28 يوم) الى الماء او المشتقات النفطية المختلفة (نفط خام, دهن سيارات, نفط اسود وكاز). الخواص التي درست هي, الخواص الميكانيكية, (مقاومة الانضغاط ، ومقاومة الشد، مقاومه الانثناء، ومعامل المرونة الاستاتيكي) الخواص الديناميكية (الموجات فوق الصوتية , ومعامل المرونة الديناميكي ), التغير بالطول و الامتصاص الكلي والكثافة للخرسانة ذاتية الرص بعد التعرض للمشتقات النفطية بشكل مستمر. اظهرت النتائج ان مقاومة الانضغاط ، ومقاومة الشد، مقاومة الانثناء، ومعامل المرونة الاستاتيكي, الموجات فوق الصوتية, ومعامل المرونة الديناميكي و الكثافة لنماذج الخرسانة ذاتية الرص المغمورة بشكل مستمر في الماء ازدادت بزيادة فترة الغمر. بشكل عام اظهرت النتائج انخفاضا في خواص الخرسانة ذاتية الرص بزيادة فترة التعرض للمشتقات النفطية.


Article
Effect of disinfectant agents on certain physical and mechanical properties of type IV dental stone

Authors: Hanan Abdul- Rahman Khalaf حنان عبد الرحمن خلف --- Mithaq Radhi Mohammed ميثاق راضي محمد
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2014 Volume: 26 Issue: 1 Pages: 24-31
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: Dental stone casts come into contact with impression materials and becomes susceptible to cross contamination from saliva and blood. This study was done to evaluate the physical and mechanical properties of dental stone type IV after treatments with various disinfecting agents and regimes (methods).Materials and Methods: Type IV dental stone and different types of disinfecting agents were used and divided into seven groups: G1: dental stone without disinfection (control group), G2: dental stone mixed with silver nitrate powder 0.5% , G3: dental stone mixed with silver nitrate powder 1%, G4: dental stone mixed with copper sulfate powder 0.5%, G5: dental stone mixed with copper sulfate powder 1% ,G6: dental stone immersed in propanol 70% and G7: dental stone immersed in ethanol 70%.Setting time, linear setting expansion, surface detail reproduction, compressive strength of type IV dental stone as well as compatibility with auto mixing addition silicone impression material were evaluated. The statistical analysis were conducted by ANOVA test followed by LSD test (p<0.05), also chi square test was used.Results: The compressive strength, linear setting expansion, surface detail reproduction and compatibility of stone specimens was affected to a higher extent by mixing with silver nitrate powder 1%, copper sulfate powder 1% while treating the stone specimens with the disinfecting powders at low concentrations as well as immersion of stone specimens in either ethanol or propanol for 15 minutes produce less effect on the previous tested properties. Conclusion: Silver nitrate 0.5%, copper sulfate 0.5% powders as well as 15 minutes immersion in 70% ethanol or 70% propanol did not promote adverse alterations in most of evaluated properties of type IV dental stone


Article
The Effect of Products Cooling on the Pollutants Emission from a Continuous Combustion Chamber
تأثير تبريد نواتج الاحتراق على انبعاث الملونات من مسجرة احتراق ثابتة الضغط

Authors: Abdul AL-Kadhim M.Hasan --- Abdul Sattar Jawad --- Murtadha Shubber Amran
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 1 Part (A) Engineering Pages: 12-21
Publisher: University of Technology الجامعة التكنولوجية

Loading...
Loading...
Abstract

This paper presents the effect of products cooling on the pollutants emission of (carbon monoxide [CO], unburned hydrocarbon [UHC], nitrogen oxide [NOX], and Soot) from a continuous combustion chamber. Products cooling technique was accomplished by installing heat exchanger in the way of the exhaust gases. The water flow rate through heat exchanger was varied from 0 to 30 liters per minute with 10 liters per minute increment. With a droplet size of 80 µm for gas oil fuel and kerosene fuel, and local equivalence ratio was varied from 0.8 to 1.4. When using the products cooling technique it was found that the NOX is inversely proportional with increasing the water flow rate through heat exchanger with the maximum decrease in NOX emissions of 18.76%. But , CO , UHC and soot are directly proportional to increasing the water flow rate through heat exchanger as the maximum increase in CO , UHC and soot were (27.43%,26.32%,19.87%) respectively .also found the emissions from gas oil fuel more than kerosene fuel .

تم أنجاز دراسة عملية حول تأثير تبريد نواتج الاحتراق على انبعاث الملوثات احادي اوكسيد الكاربون (CO)، الوقود الغير محترق(UHC)،اكاسيد النيتروجين) (NOXبالإضافة الى السخام من حجرة الاحتراق المستمر. عملية تبريد النواتج تمت بوضع مبادل حراري في طريق غازات العادم. تدفق الماء عبر المبادل الحراري تم تغييره من 0 الى 30 لتر في الدقيقة بزيادة مقدارها 10 لتر في الدقيقة في كل مرة , قطر قطيرات الوقود 80 مايكرومتر عند استخدام زيت الغاز و الكيروسين كوقود وذلك بزيادة ضغط التذرية وكذلك النسبة المكافئة المحلية قد تراوحت بين 0.8 الى 1.4. عند استخدام تقنية تبريد نواتج الاحتراق وجد أن NOX يتناسب عكسيا مع زيادة تدفق الماء من خلال المبادل الحراري وأن الحد الأقصى في خفض انبعاثات NOX هو 18.76٪. في المقابل، CO، UHC والسخام ويتناسب طرديا مع زيادة معدل تدفق الماء خلال المبادل الحراري وأن أقصى زيادة في CO ، UHC والسخام هي (27.43٪، 26.32٪، 19.87(%. ووجد أن الانبعاثات من زيت الغاز تكون أكثر من الانبعاثات الناتجة عن وقود الكيروسين.


Article
Content of Amino Acids in Poultry Meat Products
محتوى الأحماض الأمينية في منتجات لحوم الدواجن

Author: A. Motlak أكرم مطلك صويح
Journal: Kufa Journal For Veterinary Medical Sciences مجلة الكوفة للعلوم الطبية البيطرية ISSN: 20779798 Year: 2016 Volume: 7 Issue: 1 Pages: 81-88
Publisher: University of Kufa جامعة الكوفة

Loading...
Loading...
Abstract

This work presents the results of detailed studies of protein quality of 13 kinds of poultry products; presents the results of the determination of amino acids from a total of 108 samples. Demonstrates the results of protein studies and discusses the importance of poultry fats (content of selected fatty acids), salts, nitrates and minerals. Based on the appraisal of the manufacturing process steps the study considers their possible impact on the biological value of the final products that are consumed in standard amounts, pointing out some of the possible adverse effects on the biological value of poultry raw material, adverse impacts of some added substances, increased by final processing. Results of studies of poultry products also prove that the use of additives must be prudent and there should be the maximum extent of use limited as much as possible; there must be carefully considered the necessity of each technological step and its impact on the raw material, finished product as well as the consumer's health.

العمل يعرض نتائج نوعية البروتين الموجود في 13 نوع من منتجات لحوم الدواجن ويظهر نتائج انواع ومقادير الأحماض الأمينية المتواجدة فيها, وتوضح الدراسة نتائج البروتين ومناقشة اهمية الدهون والأملاح والنترات والمعادن في منتجات لحوم الدواجن مستندة الى تقييم خطوات عمليات التصنيع والفحص البكتريولوجي وتاثيراتها المحتملة على القيم البايولوجية لهذه المنتجات ومراقبة الأثار السلبية لبعض المواد المضافة والتي يجب ان تستخدم بكميات محدودة قدرالأمكان وان تدرس بعناية قصوى كل خطوة من عمليات التصنيع وتاثيراتها على المواد الخام او المنتج النهائي ومدى تأثيراتها على صحة المستهلك.

Listing 1 - 10 of 100 << page
of 10
>>
Sort by
Narrow your search

Resource type

article (100)


Language

English (39)

Arabic (35)

Arabic and English (21)


Year
From To Submit

2019 (10)

2018 (15)

2017 (12)

2016 (12)

2015 (9)

More...