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Article
Derivative of an image that corrupted by additive noise
اشتقاق صورةِ أفسدتْ بضوضاءِ مضافِة

Author: Suhad. A. Hamdan سهاد عبد الكريم حمدان
Journal: Iraqi Journal of Physics المجلة العراقية للفيزياء ISSN: 20704003 Year: 2014 Volume: 12 Issue: 23 Pages: 30-35
Publisher: Baghdad University جامعة بغداد

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Abstract

In this paper the behavior of the quality of the gradient that implemented on an image as a function of noise error is presented. The cross correlation coefficient (ccc) between the derivative of the original image before and after introducing noise error shows dramatic decline compared with the corresponding images before taking derivatives. Mathematical equations have been constructed to control the relation between (ccc) and the noise parameter.

في هذه البحث، سلوك نوعية الميل الذي طبّق على صورة مشوبة بالضوضاء مقدّمة. معامل الإرتباط المتقاطع بين إشتقاق الصورة الأصلية قبل وبعد اضافة الضوضاء لاحظنا هبوط مثير في المشتقة مقارن بمعامل الإرتباط المتقاطع بين الصورة الأصلية والصورة بعد الحصول على خطأ ضوضاء. من هذه النتائج معادلات رياضية بنيت التي ربطت بين معامل الإرتباط المتقاطع ومعاملات الضوضاء.


Article
Estimation of the Folic Acid Using Zero Order, Area Under Curve and First Derivative Spectrophotometric Methods in Pure and Marketed Tablet Formulations

Authors: Ruba F. Al beea --- Hend A. Abbas --- Rawa M. M. Taqi --- Dhifaf A. Abdulabbas
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2017 Volume: 20 Issue: 3 Pages: 34-41
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

Three simple, inexpensive and nontoxic spectrophotometric methods have been used for determination folic acid in pure and market formulation tablets. Linearity was founded in the range 6- 20 mg.l-1 for the all three methods, the detection limits was found to be 0.261 for zero order method, 0.006 for AUC method and 3.800 for first derivative method. The RSD% was found to be less than 0.856 indicating a good accuracy and precision of three proposed methods. The results of zero order, AUC and first derivative methods were statistically compared with those obtained by the official standard method using the F-test and t-test and found to be a good agreement.


Article
Zero order and first Derivative Spectrophotometric Determination of pb(II) by Complex with N,N'-cyclohexane-l,2-diylidene-bis (4-methaxybenzoythydrazide) (CHMBH)
طريقة الترتيب الصفري والمشتقة الاولى لتقدير الرصاص باستخدام التعقيد مع ن, ن- سايكلوهيكسان-1,2-دايلادين-ثنائي(4-ميثاكسي بنزويثايدرازايد) (CHMBH)

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Abstract

In this work, two novel, accurate and reliable spectrophotometric methods have been developed for the determination of pb(II) ion by complexion with the ligand N,N'-cyclohexane-l,2-diylidene-bis(4-methaxybenzoythydrazide (CHMBH). In this study, pb(II) ion was determined by the application of Zero order and first Derivative Spectrophotometric by measuring the amplitude at 258 nm, The linearity ranges for both methods were found to be 20–55 mg/l, Limit of Detection and Quantitation were found to be 0.33 mg/l and 1 mg/l for zero order and 1.438 mg/l and 4.360 mg/l for first derivative method respectively.Both methods have good accuracy found to be 99.594% and 100.497% respectively.

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