research centers


Search results: Found 2

Listing 1 - 2 of 2
Sort by

Article
Welding procedures of Turbine Blades by Using ER 309L Austenitic Filler Wire

Authors: H. A. Olaa --- K.H. Abbas --- S. A. Emad --- A.H. Fadhil
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2017 Volume: 35 Issue: 1 Part (A) Engineering Pages: 68-75
Publisher: University of Technology الجامعة التكنولوجية

Loading...
Loading...
Abstract

In the present work it has been investigated the repair of LP-blades steam turbine made of AISI 410 martensitic stainless steels (MSS) by GTAW welding, the repair welding carried out by using ER 309L as consumable filler wire. PWHT was carried out at 1100ᵒC for 1h. The structure-property relationships of the weldments were established based on the current modes employed by utilizing combined techniques of optical microscopy, line/point and EDS analysis. Results showed that Micro-hardness along the base and HAZ regions increased after PWHT as compared to in state of as-welded. After welding process, microstructure photographs of weld-metal region revealed two phase the vermicular δ-Ferrite and γ-austenite matrix. HAZ region consisted of tempered lath martensite with carbides. Line/Point analysis revealed the direction of segregation, whereas chromium was increased in core and depleted in boundary, while nickel was depleted in core and increased in boundary, this support the δ – ferrite was primarily solidified.


Article
Study of some serum biochemical changes of experimental diabetes mellitus in Donkey
دراسة لبعض التغيرات للصفات الكيموحيوية لمرض السكري المستحدث في الحمير

Loading...
Loading...
Abstract

This study was conducted to induce experimental diabetes in donkeys and assess some serum biochemical changes in diabetes mellitus.Fifteen donkeys were used in this experiment and divided into two groups:A. Treatment group which include (11) donkeys . Diabetic group. denoted by Dm.B. Control group which includes (4) donkeys denoted by Cm. Animals were housed in field .The animals were left tow weeks for adaptation. Diabetes mellitus was induced by i.v injection of alloxan monohydrate at dose rate 100 mg/kg dissolved in 25 ml of normal saline, while the control groups were injected with 25 ml of normal saline. Blood was collected before injection of alloxan monohydrate and after that (10,20.30,40)days to check fasting and random serum glucose.The laboratory tests including serum glucose, serum urea, serum creatinine, serum cholesterol, serum lactate dehydrogenase , We found out the following result according to the periods of the experiments: Serum glucose level was elevated starting from the 1st 10 days period after induction of diabetes mellitus. It reached its peak levels on day(20,30,40). Serum urea, serum creatinine, serum cholesterol, serum lactate dehydrogenase were elevated in diabetic donkeys,in control groups, but there were no significant difference.

أجريت الدراسة الحالية لتقييم بعض الصفات الكيموحيوية المتمثلة بتركيز السكر والكولسترول واليوريا وأنزيم الكيرياتين عند استحداث مرض السكري في الحمير باستخدام مادة الالوكسان .استخدم في التجربة 15 من الحمير والتي قسمت بصورة عشوائية إلى مجموعتين تضمنت المجموعة الأولى (المعاملة ) 11 من الحمير والتي حقنت بمادة الالوكسان بجرعة 100ملغم/كغم .أما المجموعة الثانية (سيطرة) والتي تضمنت 4 حمير حقنت بمحلول الملح الفسلجي بجرعة 25 مل/حيوان . تم جمع عينات الدم خمس مرات (قبل الحقن ,40,30,20,10 يوم بعد الحقن) وعلى مرحلتين وهما مرحلة الصوم ومرحلة إعطاء الغذاء .أشارت نتائج التجربة إلى ارتفاع عالي المعنوية (p<0.01) لمادة الالوكسان على تركيز السكر عند (10 و20 و30 و40 )يوم خلال مرحلة الصوم بينما وجد تأثير معنوي (p<0.05) عند (20 و30)يوم وارتفاع عالي المعنوية(p<0.01) عند 40 يوم خلال مرحلة أعطاء الغذاء .كما نلاحظ ارتفاع معنوي(p<0.05) عند 10 يوم بعد الحقن وارتفاع عالي المعنوية(p<0.01) عند 20 و 30 و40 يوم بعد الحقن .أما بالنسبة لمستوى اليوريا فقد أشارت النتائج إلى تأثير عالي المعنوي(p<0.01) عند 40 يوم بعد الحقن .كما أثرت المعاملة تأثيرا عالي المعنوية(p<0.01) على مستوى أنزيم الكيرياتين عند 20 و 30 40 يوم بعد الحقن.كما أثرت المعاملة تأثيرا معنوياً (p<0.05) على مستوى أنزيم LdH عند 40يوم بعد الحقن.

Listing 1 - 2 of 2
Sort by
Narrow your search

Resource type

article (2)


Language

English (2)


Year
From To Submit

2017 (1)

2013 (1)