Kirkuk Journal of Science

In this research, new coated carbon electrodes were constructed and used for the
determination of Sildenafil citrate (SILC) drug. The electrodes were constructed by preparing
ion-pair for (SILC) with phosphotungstic acid (PTA) or phosphomolybdic (PMA) acid using
dibutyl phthalate (DBP) as a plasticizer. These electrodes showed good sensitivity towards
SILC with linear range of (1.010-7
-1.010-2
) M, correlation coefficient, (0.9990), the life
time (120) days, optimum temperature range (23-65)
oC and optimum pH range (2-5) for both
electrodes, limit of detection (5.05510-8
and 5.11610-8
) M, slope (57.29 and 59.10)
mV/decadefor SILC-PTA and SILC-PMA electrodes respectively. These electrodes were
successfully applied for determination of SILC in pure and pharmaceutical preparation
form(tablets) with recovery of not less than 98%.

The main purpose of this paper, is study the ideas of order- Convergence of filters in a
Riesz spaces and that is through prove an important theorems related to the some properties
Riesz spaces. So we established that the intersection and union all subsets of the collection of
all proper filters ????(ℳ) were converge to point in Riesz space it's the same convergence point
the filter there exist in these subsets and proved that order-convergence for intersection
(union) two filters to intersection (union) two different points in Riesz space is equivalent to
the set consist of two convergence points we could write it by using these filters .

This article focuses on the quality of data mining algorithms in terms of the accuracy
ratio and time consumption. So, in order to figure out the best algorithm among the
classification and clustering algorithms, the WEKA program will be testing all algorithms
using a real dataset from the size effect on defect proneness for open source software. The
Mozilla product is adopted as an example of open source software. The dataset that is used in
this paper represents the output of the study of the size effect on defect proneness in the open
source software. The study of Mozilla product shows a significant relationship between the
size of software and the number of defect proneness in software. The Mozilla product study
produced a dataset to be as inputs of the WEKA program in order to compare the data mining
tools (algorithms). We use the Naive Bayes, Decision Trees J48, Expectation-maximization
for classifying and K-Star and Simple KMeans for clustering methods. The findings
demonstrate the difference between the algorithms according to the accuracy, and the time
consuming to reach the result in each algorithm. Furthermore, the effect of the software size is
significant on defect proneness. Finally, the experiments are conducted in WEKA with the
aim of this research is finding out the best algorithm in terms of accuracy and timeconsuming. At the end, the paper will be figuring out the best algorithm in order to choose
and depending on it in the tests of classification and clustering.

In this paper calculation spectroscopic and vibrational properties using Semi-empirical
method, through the results showed the IR spectra, the value of the lowest amount of total
energy for H2Pc molecule was equal to (−7049.071Kcal⁄mol) for (C16-H41) and
(−7049.07Kcal⁄mol) for (C27-H43), for MgPc molecule is equal to (−6974.54Kcal⁄mol)
for (C17-H42) and (−6974.55Kcal⁄mol) for (C28-H44), and after that equilibrium distance is
(r = ????eq = 1.09A°
) for each molecule. The theoretical and experimental results were
compared to the energy gap, for H2Pc (5.67 eV), (5.04 eV), for MgPc (5.043 eV), (2.73 eV),
respectively.

This Study aims to calculate the drought index by application the de Martine equation
and determine the type of climate for rainy months in the three selected stations in Iraq
(Mosul, Baghdad and Nasiriya) by use data of (Rainfall and Temperature) for the period
ranged (1970 to 2010), which was recorded from the "Iraqi Meteorological Organization and
seismology" in Baghdad.
The results appears that the climate is humid in the months (December and January), the
climate is variable between (wet and semiarid) in the months (February, March, April and
November), while the climate is variable between (semiarid and arid) in the months (May and
October) as a result of variation the values of (Rainfall and Temperature) for rainy months in
the three studying stations.
In this research the relationship between values of drought index and the rainfall amount
and temperatures has been showing by calculation the correlation coefficient and also
obtained simple linear regression by applying program of Microsoft excel (2010), the results
indicated the existence of strong linear correlation between the drought index and rainfall in
the three studying stations values between (0.96) – (0.98), while the results showed the
occurring of strong inverse correlation between the drought index and temperatures in the
three studying stations values between (-0.93) – (-0.98) in the three stations.

The study was conducted in the laboratories of College of Education for
women/University of Tikrit and Environmental Laboratory in Science College/University of
Kirkuk, for the period from July 2018 until end of December 2018, during which 773 fish
were collected, including 358 fish from fishes of education ponds (Cyprinus carpio and
Barbus lutens) and 415 from Lower Zab River fish (Barbus sharpeyi, Barbus xanthopterus,
Silurus glanis).
The results recorded the infection of fish with three types of external primary parasites:
Trichodina elegini in B. xanthopterus and breeding pond fish (C. carpio and donkeys),
Chilodonella cyprinid by 7.9% in C. carpio fish from ponds and B. xanthopterus fish by 7.5%
and 5.4% in B. sharpeyi fish, and there was no infection in S. glanis and B. lutens fish ,
Einaria sinensis, 14.8% in S. glanis fish, 9.589% in C. carpio fish from ponds, 8.17% in B.
xanthopterus and 6.081% in B. sharpeyi fish.
Changes were recorded in some of physical and chemical properties of water samples, as
fluctuations in the average temperature of water were recorded between 26.7-11.5 ° C in river
stations and 28-19 ° C in ponds stations, and the discretion values showed site rates ranging
from 28.9-21.6 NTU to water in river stations and 24. 6-20 NTU in ponds stations, a rate of
electrical conductivity was recorded565-369micemens /cm for water in river stations and 690-
408 micrometers / cm in ponds stations, pH values ranged between 8.3-7.2 in river sites and
8.4-7 in ponds, and scored Variations in oxygen biomarker values between 4.4-0.6 mg / l in
river stations and 5.2-1.9 in ponds.

The study was conducted in the laboratories of College of Education for
women/University of Tikrit and Environmental Laboratory in Science College/University of
Kirkuk, for the period from July 2018 until end of December 2018, during which 773 fish
were collected, including 358 fish from fishes of education ponds (Cyprinus carpio and
Barbus lutens) and 415 from Lower Zab River fish (Barbus sharpeyi, Barbus xanthopterus,
Silurus glanis).
The results recorded the infection of fish with three types of external primary parasites:
Trichodina elegini in B. xanthopterus and breeding pond fish (C. carpio and donkeys),
Chilodonella cyprinid by 7.9% in C. carpio fish from ponds and B. xanthopterus fish by 7.5%
and 5.4% in B. sharpeyi fish, and there was no infection in S. glanis and B. lutens fish ,
Einaria sinensis, 14.8% in S. glanis fish, 9.589% in C. carpio fish from ponds, 8.17% in B.
xanthopterus and 6.081% in B. sharpeyi fish.
Changes were recorded in some of physical and chemical properties of water samples, as
fluctuations in the average temperature of water were recorded between 26.7-11.5 ° C in river
stations and 28-19 ° C in ponds stations, and the discretion values showed site rates ranging
from 28.9-21.6 NTU to water in river stations and 24. 6-20 NTU in ponds stations, a rate of
electrical conductivity was recorded565-369micemens /cm for water in river stations and 690-
408 micrometers / cm in ponds stations, pH values ranged between 8.3-7.2 in river sites and
8.4-7 in ponds, and scored Variations in oxygen biomarker values between 4.4-0.6 mg / l in
river stations and 5.2-1.9 in ponds.