Dynamic analysis of a harvested fractional-order biological system with its discretization
(25)
(19)
Publication Date
Tue Sep 01 2020
Journal Name
Meta Gene
(5)
Publication Date
Tue Oct 10 2023
Journal Name
Current Trends In Biotechnology And Pharmacy
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Publication Date
Mon Jul 01 2019
Journal Name
Journal Of Physics: Conference Series
Measurement of uranium concentration in the water samples collected from the areas surrounding in Al-Tuwaitha nuclear site using the CR-39 detector
Abstract. In this research, the uranium concentration in (16) water samples collected from some agricultural areas surrounded with AlTuwitha nuclear site in Baghdad-Iraq was measured by using a CR-39 detector. The concentration of uranium in this study was from (0.6 ± 0.33mg/l) to (2.51 ± 0.49 mg/l), and the weighted average for the concentrations (1.262 ± 0.402 mg/l). The results showed it is a concentration of uranium level in water samples studied is higher than the allowed limit recommended by WHO and ICRP.
(1)
(1)
Publication Date
Thu Feb 16 2023
Journal Name
Iraqi Journal Of Pharmaceutical Sciences ( P-issn 1683 - 3597 E-issn 2521 - 3512)
Qualitative and Quantitative Estimation or Chemical Constituents from Leaves and Roots of Iraqi Agave Attenuata by GC-MS and RP-HPLC(Conference Paper) #
Keywords: Agave attenuata
phenolic compounds
steroidal saponins
gas chromatography/ mass spectroscopy(GC/MS)
reverse phase-high performance liquid chromatography (RP-HPLC)
This research concentrate on cultivated Iraqi Agave attenuata dried leaves and roots, because of little studies on this plant especially on the root that lead to the eager of study and comparison of phytochemical constituents between leaves and root. Extraction of bioactive constituents was carried out using several solvents with increasing polarity (n-hexane, ethyl acetate and methanol) by soxhlet apparatus. Steroidal saponins in Agave genus is well documented in many species, lightening the minds in this research on extraction method which is specific for steroidal saponins. Phytochemical screening was done by GC/MS for n-hexane fraction, qualitative and quantitative estimation of several bioactive constituents (caffe
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(1)
Publication Date
Sat Dec 01 2018
Journal Name
Journal Of Economics And Administrative Sciences
Comparison Between Ordinary Methods (LS,IV) and Robust Methods (2SWLS,LTS,RA) to estimate the Parameters of ARX(1,1,1) Model for Electric Loads
أنموذج الانحدار الذاتي بوجود متغير خارجي (ARX)
الكشف عن القيم الشاذة
طريقة المربعات الصغرى الاعتيادية (OLS)
طريقة المتغيرات المساعدة ذات الخطوات الاربعة (4SIV)
طريقة المربعات الصغرى الموزونة ذات المرحلتين (2SWLS)
طريقة المربعات الصغرى المشذبة (LTS)
مقدرات التباينات الذاتية للبواقي(RA).
(ARX)
The Outliers Detection
Ordinary Least Squares Method
Four-Step Instrumental Variables Method
Two-Stage Weighted Least Squares Method
Least Trimmed Squares Method
Residual Auto-covariances Estimators.
Abstract:
The models of time series often suffer from the problem of the existence of outliers that accompany the data collection process for many reasons, their existence may have a significant impact on the estimation of the parameters of the studied model. Access to highly efficient estimators is one of the most important stages of statistical analysis, And it is therefore important to choose the appropriate methods to obtain good estimators. The aim of this research is to compare the ordinary estimators and the robust estimators of the estimation of the parameters of
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Publication Date
Wed Aug 28 2019
Journal Name
International Journal Of Drug Delivery Technology
Synthesis, Characterization and Screening their Antibactrial Activity of some New Oxazepine and Diazepine Compounds Containing 1,3,4-Oxadiazole Ring Derived from L-Ascorbic Acid
1
3
4-oxadiazole
Schiff base
1
3-oxazepine
1
3-diazepine
L-Ascorbic acid
The search involve the synthesis of some new 1,3-oxazepine and 1,3-diazepine derivatives were synthesized from Schiff base. The Schiff base (VIII) prepared from reaction of aldehyde (IV) derived from L-ascorbic acid with aromatic amine ([2-(4- nitrophenyl)-5-(4-aminophenyl)-1,3,4-oxadiazole] (VII). Oxazepine compounds (IX-XI) were synthesized from the cyclic condensation of Schiff base (VIII) with (maleic, phthalic and 3-nitrophthalic) anhydride, compounds (IX-XI) that were reacted with p-methoxyaniline to give diazepine derivatives (XII-XIV). The structures of the new synthesized compounds have been confirmed by physical properties and spectroscopy measurements such as FTIR, and some of them by 1 H-NMR, 13 CNMR, Mass, and evaluated
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(2)
Publication Date
Thu Feb 01 2024
Journal Name
Journal Of Materials Science
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(4)
Publication Date
Fri Jan 01 2021
Journal Name
Artificial Intelligence For Covid-19
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(25)
Publication Date
Sat Jun 04 2022
Journal Name
Journal Of Inorganic And Organometallic Polymers And Materials
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Publication Date
Tue Dec 07 2021
Journal Name
2021 14th International Conference On Developments In Esystems Engineering (dese)
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