research centers


Search results: Found 3

Listing 1 - 3 of 3
Sort by

Article
Interferences study for Selenium determination using of on Liquid Nitrogen Trap Hydride generation atomic absorption Spectrometry

Author: Niran J. Al-Salihi
Journal: basrah journal of science البصرة للعلوم ISSN: 18140343 Year: 2009 Volume: 27 Issue: 1C english Pages: 70-79
Publisher: Basrah University جامعة البصرة

Loading...
Loading...
Abstract

A method has been developd determine selenium by hydride generation atomic absorption using nitrogen trapping technique. A series of experiments was performed to obtain the optimum condition. The results show that this method has the advantage of being sensitive, accurate, rapid and simple. Transition metal and other hydride forming elements interferences on the determination of selenium was studied. A substantial increase in the range of interference – free determination of selenium can be achieved by increasing the hydrochloride acid concentration

Keywords

: HGAAS --- Interferences --- selenium --- D.L --- linear range


Article
Using of articulators in the construction Of crown and bridges work in Baghdad:(A survey study) Dr. Ammar A. Alsa'ady, B. D.S., M.Sc., Ph.D.*

Author: Dr. Ammar A. Alsa'ady, B. D.S., M.Sc., Ph.D.* د.عامر السعدي
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2008 Volume: 5 Issue: 2 Pages: 142-147
Publisher: Al-Mustansyriah University الجامعة المستنصرية

Loading...
Loading...
Abstract

Articulators are surrounded by an aura of mystery, but at the end of the day they are a tool to help a dentist to give his patient a successful restoration, saving time money and hassle.This study was conducted to obtain data from which some preliminary judgments could be made regarding the articulators being used for fixed partial denture laboratory procedure in dental practice. Data were collected from a questionnaire sent to 15 fifteen dental laboratories (which performed fixed prostheses only) in Baghdad, the number of the technicians employed by the laboratory were 55, the number of the dentists deal with the specified laboratory were 524 dentists including (Professional dentists 180, Post-graduate dental students 46 and Junior dentists 298), the type of the fixed-prosthodontics (cast metal, PFM, and All-ceramic) and the percentage of each type of work, the percentage of using articulators and the type of the articulators and the percentage of there uses included (simple hinge, semi-adjustable and fully-adjustable).Results showed that the percentage of articulators being used was 16.66% in comparison to the percentage of hand articulation 83.33% distributed as 99.66% used simple articulators, 0.33% semi-adjustable articulators and 0% for fully adjustable articulators.


Article
PROTECTION OF MULTI INPUT MULTI OUTPUT MOBILE COMMUNICATION AGAINST MANMADE JAMMING AND INTERFERENCES

Authors: Jamal Mohammed Rasool --- Noor Jamal Jihad
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2019 Volume: 23 Issue: 2 Pages: 93-99
Publisher: Al-Mustansyriah University الجامعة المستنصرية

Loading...
Loading...
Abstract

Recently, the use of mobile communications has become very popular but a huge problem of manmade and other kinds of interferences have been appeared and there are specific manners which many people used against this kind of communication although CDMA techniques has a good protection of these kinds of noise which don't mention it in this paper .Multiple Inputs Multiple outputs (MIMO) techniques has high capacity, increased diversity, and interference suppression. In this paper the model of receiver with MIMO techniques has introduced by using MATLAB 2014b to show the scan of the beam of antenna and measure the received power to get the best situation to make the call by suppression the signal from the direction which is many more the specific threshold.

Listing 1 - 3 of 3
Sort by
Narrow your search

Resource type

article (3)


Language

English (3)


Year
From To Submit

2019 (1)

2009 (1)

2008 (1)