A theoretical and protection study was conducted of the corrosion behavior of carbon steel surface with different concentrations of the derivative (Quinolin-2-one), namly (1-Amino-4,7-dimethyl-6-nitro-1H-quinolin-2-one (ADNQ2O)). Theoretically, Density Functional Theory (DFT) of B3LYP/ 6-311++G (2d, 2p) level was used to calculate the optimized geometry, physical properties and chemical inhibition parameters, with the local reactivity to predict both the reactive centers and to locate the possible sites of nucleophilic and electrophilic attacks, in vacuum, and in two solvents (DMSO and H2O), all at the equilibrium geometry. Experimentally, the inhibition efficiencies (%IE) in the saline solution (of 3.5%) NaCl were studied using potentiometric polarization measurements. The results revealed that the (%IE) for carbon steel corrosion by ADNQ2O is (89.88%). The obtained thermodynamic parameters support the physical adsorption mechanism. The adsorption followed the Langmuir isotherm. The surface change on carbon steel was studied using SEM (Scanning Electron Microscopy).
This research involves the civilized vision of the trends and approaches of philosophical thought in the Islamic Orient, whose objectives were to show Islamic philosophy and the pioneers of thought in it and the most important products that crystallized after its emergence in the Islamic world
The words in the Holy Qur’an are distinguished by the
accuracy of expression, their elegance, the lightness of their
performance, the harmony of their timbre, as well as the ease of
their pronunciation. We find the coarse words in which the
movement of sounds and the hesitation of the soul are mixed, as
it was distinguished by the abundance of its words indicating the
same meaning without a phenomenon that the reader or the
listener notices
this research talks about the weakness that had happened in the construction of the sentences which effected on the syntactic meaning . it considers an important problems faced the languages .
Using religious characters which come from religion is a significant means that poets applied in their texts. The Iraqi poet Adib Kamal Aldin applied religious characters as an active means helping the theme of the text and playing a great role in expanding the meanings and their implications in the text.
المنازعات والحروب الاهلية في العالم الثالث نموذجاً الصومال وافغانستان
لقد أرسى الفنان العراقي القديم، بلا ريب، الأسس الأولى للفنون فكانت وما زالت أعماله مصدرا مهما للمدارس الفنية كافة منذ العصور التاريخية وما قبلها، وداولتها الحضارات المتعاقبة في أرضه وخارجها حتى أصبح فن الرافدين يطبع كثيرا من خصائصه وسماته على تلك الحضارات. وعندما بزغ نور الإسلام السرمدي وبدد
Praise be to God, Lord of the Worlds, and prayers and peace be upon our master and beloved Muhammad and all his family and companions. As for what follows: The research presented the synonymous and common verbal expressions mentioned in the book Al-Taliq Al-Mughni on Sunan Al-Daraqutni by the scholar Sheikh Shams Al-Haq Muhammad Al-Azeem Abadi
ان الهدف من البحث هو تقويم منهاج الفيزياء للصف الاول الثانوي في الجمهورية اليمنية