ISSN: 1817-2695

Volume 43, Issue 1

Volume 43, Issue 1, Spring 2017, Page 43-170


CORE-POLARIZATION EFFECTS ON E2 TRANSITIONS IN EXOTIC NUCLEUS 70Ni

Journal of Basrah Researches (Sciences), Volume 43, Issue 1, Pages 43-51

The structure of 70Ni nucleus is studied by using Particle-Vibration Coupling Model (PVCM), which
separates the nucleus into three systems, vibrating core and two interacting neutrons. The vibration of the
core is represented by single quadrupole phonon, and the two neutrons are assumed to occupy the state
1g9/2 and interacted by MSDI. A very well reproduction for the positive parity states of 70Ni is obtained by
applying the PVCM. The core polarization effect that includes particle-hole excitation from the proton
states of the core, to the states outside the model space with 2ℏω, is very necessary to reproduce the
reduced E2 transition probability.

Solvent Effects on Performance of P3HT: PCBM Organic Solar Cell

Journal of Basrah Researches (Sciences), Volume 43, Issue 1, Pages 62-71

Regioregularpoly(3-hexylthiophene)(P3HT):[6,6]-phenylC61-
butyricacidmethylester (PCBM) active layer were found to significantly increase
organic solar cell performance. photovoltaic devices with three solvents, Toluene (T),
Xylene (X), and co-solvent Toluene:Xylene (T:X) were fabricated. The physical
properties of these devices with different solvents are investigated. In this paper, we
find that, absorption spectrum of the blend becomes more broad with different
solvents, which is highly desirable for photovoltaic devices. Films morphology is
evaluated by Atomic Force Microscopy (AFM). X-Ray diffraction (XRD) samples
and External Quantum Efficiency (EQE) measurements are also performed for the
active layers. The Power Conversion Efficiency (PCE) enhancement for the device
with (T:X) is more significant than for other solvents. With different solvents, the
solar cells upon (T:X) give (PCE) of 0.176%, in contrast to 0.144% for (T), and
0.079% for (X), devices.

Effect of Rockwool Fibers on the Mechanical Properties and Average Time of Burning of Low Density Polyethylene

Journal of Basrah Researches (Sciences), Volume 43, Issue 1, Pages 52-61

The mechanical properties and average time of burning of composite were
made from low density polyethylene with different wt% of Rockwool fibers
(1, 2.5, 5, 7.5, 10)% w/w and found that the best ration of composites 7.5%.
The elastic deformation properties of samples were evaluated by Loadedelongation
measurement. The stress - strain results found that the elastic
properties decrease with increasing of Rockwool fibers, while 10% is the best
ratio that achieved best average time of Burning (ATB).

QSAR STUDIES OF AMINO ACIDS CONJUGATED 2-AMINO-ARYLTHIAZOLE AS ANTI-BACTERIAL

Journal of Basrah Researches (Sciences), Volume 43, Issue 1, Pages 72-85

Quantitative structure-activity relationships (QSAR) of 16 thiazole derivatives
against five types of bacteria, namely: Klebsiella pneumoniae, Staphylococcus aereus,
Escherichia coli, Bacillus substilis and Pseudomonas areginosa, was carried out. Physiochemical
parameters were obtained computationally by optimization of chemical structures
at minimum energy using molecular mechanics (MM+) theory and the semi-empirical
molecular orbital (AM1) method. Then, multiple linear regression (MLR) analysis used to
correlate changes in chemical structure and experimental antibacterial activity. Moreover, it
is found that some descriptors are in strong dependences to provide good information and
play important roles to evaluate antibacterial activity of thiazole derivatives. Results, 20
equations were found statistically with correlation coefficient rang (0.806-0.955). In
addition, within the current QSAR study, the quality of the discriminant models was
determined on the basis of correlation coefficient (R2
), Fisher ratio (F), and standard error
(S). Consequently, five good models with high correlation coefficient (R2
>0.9) were
nominated as valuable theoretical base to improve 15 other subset predicted structures of
amino acids conjugated 2-amnio-arylthiazole demonstrating anti-bacterial activity, and most
of them showed good antibacterial activities against positive gram of bacteria.

Simultaneous Approximation by Szὰsz-Kantorovich Operators

Journal of Basrah Researches (Sciences), Volume 43, Issue 1, Pages 100-107

In this paper, we study the simultaneous approximation by Szὰsz-Kantorovich type operators. We prove that these operators are converged to the function being approximated. Also, we discuss a Voronovaskaja-type asymptotic formula in simultaneous approximation for these operators.

On New Coincidence and Fixed Point Results for Single-Valued Maps in Partial Metric Spaces

Journal of Basrah Researches (Sciences), Volume 43, Issue 1, Pages 130-137

In the present paper, we are interested in the study of the concept T, f  generalized
condition B and combined with the concept of partial metric space and prove some
common fixed point results in such a space. Our results generalize, extend and unify many
results. Example is given showing the validly of our results.