Nasreen R. Jber
@nahrainuniv.edu.iq
College of Science, Chemistry Department
Al-Nahrain University
Professor, Ph.D. in Chemistry Science
Associate Dean for Scientific Affairs/ College of Science/ Al-Nahrain University
EDUCATION
Professor, Ph.D. in Chemistry Science
RESEARCH INTERESTS
Organic Chemistry, liquid crystal synthesis
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Lamees A. Abdullah, Hamsa N. Naser, Alaa A. Rashad, and Nasreen R. Jber
Springer Science and Business Media LLC
, Karrar M. Juaila, Nasreen R. Jber, and
Al-Nahrain Journal of Science
In this study, synthesis of [D-H] via reaction of compound [C] with p-alkoxybenzaldehyde. The derivative [C] that produces from reaction the 4-amino-5-(4-aminophenyl)-4H-1,2,4-triazole-3-thiol with phosphory l chloride. The synthesized derivatives are characterized by 1HNMR and FTIR spectroscopies. The antibacterial activity of the obtained thiadiazol derivatives [D-H] was screened against Gram-positive bacteria viz.(Staphylococcus aureus, Bacillus subtilis) and Gram-negative bacteria viz. (Escherichia coli) by disc diffusion method, the results showed that compound [H]has the highest activity toward Bacillus subtilis and Staphylococcus aureus, while compounds [D]showed the highest activity toward E. coli.
Mehdi Salih Shihab, Nasreen Raheem Jber, and Mariam Sadoon Mohsin
Pleiades Publishing Ltd
Lamees A. Abdullah, Farah G. Khalid, Rawa K. Ibrahim, Aseel I. Mahmood, Alaa A. Rashad, and Nisreen R. Jber
Springer Science and Business Media LLC
, Zahraa M. Abdnoor, Nasreen R.Jber, , Aliaa Saadoon Abdul-Razaq, and
Al-Nahrain Journal of Science
The helicobacter pylori affected urease and pepsin enzymes in the stomach, so the object of this study is to screen the effect of bis 1,3,4-oxadiazole and bis 1,2,4, triazole derivatives compounds on h-pylori urease enzyme in vitro. The results show that urease was inhibited by all produced compounds when the concentration increased. The most effective urease inhibitor is determined to be the compounds (A3e, A3c, A3d and B3c). The clinical study involved studying the pepsin enzyme activity level in H-pyloripatients and control, the results found that the activity of pepsin elevated in h-pylori patients as compared with control. The prepared compounds were screened on pepsin enzyme in vitro and showed that all the prepared compounds decreased the pepsin activity as the concentration increased. The nitrogen heterocyclic compounds. This study concludes that nitrogen-containing heterocyclic compounds have an important future in the treatment of Helicobacter pylori disease.
, Asmaa A. Jawad, Nasreen R. Jber, , Baneen S. Rasool, , Abbas K. Abbas, and
Al-Nahrain Journal of Science
The review generalizes and systematizes in this review the results of research on the synthesis and properties of tetrazole derivatives and the properties of tetrazole compounds, and synthetic routes. In medical chemistry, the tetrazole compounds play a big role in medicinal applications such as antibacterial, anticancer, and effects on the central nervous system.
Aqel M. Rasol and Nasreen R. Jber
AIP Publishing
Zinah Hussein Ali, Nasreen R. Jber, and Abbas Khudhair Abbas
AIP Publishing
Zinah H. Ali and Nasreen R. Jber
AIP Publishing
Zainab Jasim and Nasreen R. Jber
AIP Publishing
, Aqeel M. Rasol, Nasreen R. Jber, and
Al-Nahrain Journal of Science
In this work, two new mesomorphic bent-rod shape compounds containing bis-oxadiazole rings are described. The relationship between the compound structure and the mesomorphic behavior as 3,3'-benzene-1,4-diylbis[5-(4-nitrophenyl)-1,2,4-oxadiazole] and 3,3'-benzene-1,4-diylbis[5-(4-chlorophenyl)-1,2,4-oxadiazole] were established using different terminal groups (i.e.,NO2, Cl). The mesomorphism was categorized using POM and DSC, while the compounds structure were characterized using FT-IR and 1HNMR.
, Zinah H. Aliand, Nasreen R. Jber, and
Al-Nahrain Journal of Science
This review provides brief information concerning with the dendrimer. The supramolecular organization of selected examples of liquid-crystalline dendrimers within lamellar, columnar and nematic phases is reported. It is shown that tuning of the mesomorphic structure can be achieved by an appropriate molecular design depending upon the chemical nature of the terminal mesogenic groups, dendritic core and dendrimer generation. The pseudospherical shape of a dendrimer arises from its structure, which consists of an internal region (the core) which is connected to repeating units constituting a radial branching pattern.
, Zainab Jasim, Nasreen R. Jber, and
Al-Nahrain Journal of Science
This paper is the first that deals with the new synthesis of nematic liquid crystal titled bis-[5-yl-phenylbenzidine-4`-butyloxyphenly-2-yl-1,3,4-oxadiazole] and secondly discusses research on materials that can be used in stationary phase by using (GLC) as a type of chromatography. The usage of bis-[5-yl-phenylbenzidine-4`-butyloxyphenly-2-yl-1,3,4-oxadiazole]nematic phase has resulted in a lot of superb separations of a lot of poly aromatic hydrocarbons. The retention time change in an unusual way with temperature, appearance a significant increase at the normal liquid transmission point; as expected, that impact is reduced with further planar compounds. FT-IR and 1HNMR were used to characterize the synthesized chemical structure, and POM and DSC were used to investigate the liquid crystalline characteristics.
, Abbas Khudhair Abbas, Nasreen R. Jber, and
Al-Nahrain Journal of Science
This contribution, direct new azo compounds synthesis via coupling benzidine with 4-hydroxy or alkoxy benzaldehyde (A1-A7). Schiff`s bases (B1-B7) were synthesized by condensation of azo compounds (A1-A7) and 2-aminobenzothiazole. New seven compounds of oxazepines derivates (C1-C7) have synthesized via the reaction between phthalic anhydride and Schiff bases, which that previously prepared to produce seven organic compounds as heterocyclic. As well, the oxazepines synthesized have characterized via (FT-IR, and 1HNMR spectroscopy for several of them) and physical properties have recorded. Finally, oxazepine compounds have tested against bacteria two kinds as gram positive and gram negative.
Lamees A. Abdullah, Farah G. Khalid, Alaa A. Rashad, and Nasreen R. Jber
AIP Publishing
This study reported the photoluminescence (PL) of nematic liquid crystal (LC) doped with gold nanoparticles (AuNPs). Our results demonstrated PL emission intensity of MBBA LC is improved with doping AuNPs, and the improvement of PL intensity increased with elevating concentration of AuNPs. As well as, the emission peak is changed due to presence of AuNPs. It was showed PL emission peak of LC has been shifted towards longer wavelength by 78nm in presence of 0.1 AuNPs. A small amount of AuNPs can be improved the PL intensity.This study reported the photoluminescence (PL) of nematic liquid crystal (LC) doped with gold nanoparticles (AuNPs). Our results demonstrated PL emission intensity of MBBA LC is improved with doping AuNPs, and the improvement of PL intensity increased with elevating concentration of AuNPs. As well as, the emission peak is changed due to presence of AuNPs. It was showed PL emission peak of LC has been shifted towards longer wavelength by 78nm in presence of 0.1 AuNPs. A small amount of AuNPs can be improved the PL intensity.
Alaa Adnan Rashad, Nasreen Raheem Jber, and Mehdi Salih Shihab
Elsevier BV
Linh I Awad and Nasreen R Jber
Dr. Yashwant Research Labs Pvt. Ltd.
In this study, new compounds of discotic liquid crystalline dendrimers are prepared which is derived from 1,3,5-triphenylbenzene. The synthesis of these compounds shows the effect of dendrimer unit on the mesogenic properties. The structures of prepared compounds characterized by using spectroscopic method e.g. FT-IR and 1HNMR. The liquid crystalline phases of prepared compounds was identified by using the hot-stage polarizing optical microscope (POM) and differential scanning calorimeter (DSC).
Nasreen R. Jber, Nisreen H. Karam, and Ammar H. Al-Dujaili
Informa UK Limited
Abstract The design, synthesis, and characterization of a star shaped 2,4,6-tris-(4`-carboxyphenoxy)-1,3,5-triazine liquid crystalline with columnar discotic mesophase properties establish H-bond interactions with 3,5-dialkoxypyidine were reported. The structures of the synthesized compounds were actually determined by elementary analysis, and FT-IR, 1HNMR, 13CNMR, and mass spectroscopy. The mesomorphic properties of these mesogens were examined using differential scanning calorimetry (DSC) and optical polarizing microscopy (OPM). The synthesized molecules exhibited enantiotropic hexagonal columnar liquid crystal, which depends for the H- bond complex in a 1:3 ratio.