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Phonon Confinement Effect on Lattice Thermal Conductivity of Zn4Sb3 Quantum Well Structure
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We have theoretically investigated the in-plane lattice thermal conductivity of Zn4Sb3single quantum well structure taking into account spatial confinement of phonons. The calculations were carried out for free-surface quantum wells with thickness 8.5nm in the room temperature. We show that the lattice thermal conductivity is a significant reduce. The reduction is mostly due to the drop in the average group velocity caused by the spatial confinement of acoustic phonons and the corresponding increase in phonon relaxation rates. The predicted decrease is important for the anticipated applications of Zn4Sb3 nanostructure materials for room-temperature thermoelectric devices. Our theoretical results are in a good agreement with available experimental data for Zn4Sb3 quantum wells

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Publication Date
Fri Dec 01 2023
Journal Name
Iop Conference Series: Earth And Environmental Science
Chemotaxonomy of Twelve Mimosoideae Species in Iraq
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Abstract<p>Samples of twelve species belong to mimosoideae were collected from baghdad. The current study aimed to screen the bioactive compounds from leaves methanol extracts of twelve species from Mimosoideae to assess the phytochemical compounds properties. The twelve species of Mimosoideae<italic>were Acacia cyanophylla</italic>Lindl.<italic>, Acacia farnesiana</italic>(L.) Willd.<italic>, Albizia lebbeck</italic>(L.) Benth.,<italic>Albizia julibrissin</italic>Durazz<italic>, Calliandra haematocephala, Leucaena leucocephala</italic>subsp<italic>leucocephala, Leucaena leucocephala</italic>subsp.<italic>glabrata, Mimosa pudica</italic>L.,<j></j></p> ... Show More
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Publication Date
Thu Jun 01 2017
Journal Name
International Journal Of Advanced Research
Article Detail - International Journal of Advanced Research
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The bandwidth requirements of the telecommunication network users increased rapidly during the last decades. Optical access technologies must provide the bandwidth demand for each user.The passive optical

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Publication Date
Mon Apr 01 2002
Journal Name
Renewable Energy
The optoelectronic properties of CdSe:Cu photoconductive detector
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Publication Date
Mon Jun 03 2024
Journal Name
Research Journal Of Chemistry And Environment
Molecular study of two medicinal leech species
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he genus Hirudo is an invertebrate animal that got major concerns to human. However, genetics of Hirudo has been unwell considered in Iraq. In order to gain a deeper understanding in the outline of the genetic of Hirudo that were used in alternative medicine clinics, nineteen specimens of Hirudo were obtained. Fourteen of them (H.verbana, n=10; H. orientalis, n=4) were obtained from some different clinics and scientific centres in Baghdad, Iraq between January and March 2022, these specimens were considered as non-local leeches. The other (native isolates) leeches (H. orientalis, n=5) were collected in 2014 from two localities in Erbil, northern Iraq. ITS-2, COI and 12S-rRNA of Hirudo spp were amplified using conventional polymerase chain r

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Publication Date
Thu Apr 21 2016
Journal Name
Australian Journal Of Basic And Applied Sciences
Sensing Properties of (In2O3:Eu) Thin Films
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Thin films of iridium doped indium oxide (In2O3:Eu)with different doping ratio(0,3,5,7,and 9%) are prepared on glass and single crystal silicon wafer substrates using spray pyrolysis method. The goal of this research is to investigate the effect of doping ratio on of the structural, optical and sensing properties . The structure of the prepared thin films was characterized at room temperature using X-ray diffraction. The results showed that all the undoped and doped (In2O3:Eu)samples are polycrystalline in structure and nearly stoichiometric. UV-visible spectrophotometer in the wavelength range (200-1100nm)was used to determine the optical energy gap and optical constants. The optical transmittance of 83% and the optical band gap of 5.2eV

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Publication Date
Wed Jan 01 2020
Journal Name
Opción
Mass customization under the internet of things
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Mass customization under the internet of things

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Publication Date
Mon Dec 30 2019
Journal Name
حولیات أداب عین شمس
Difficulty of translating collocations in the Quran
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Publication Date
Fri Aug 26 2022
Journal Name
International Journal Of Health Sciences
Inhancment of meropenem potency by methotrexate nanoparticles
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The MTX was converted to MTX  nanoparticles  by the modified method based on changing the pH gradually . For the first time MTX NPs+Meropenem complex were prepared and evaluated as a potential tool to overcome antimicrobial resistance and to improve pharmacokinetics of the drug, the results showed that the antibacterial activity of complex (MTX NPs plus MEM) has increased (from 1( µg/ml) to >0.5( µg/ml) for p1 , from 2( µg/ml) to 1( µg/ml) for p10 and from 8( µg/ml) to 4( µg/ml) for p48).

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Publication Date
Mon Jul 01 2024
Journal Name
Medical Journal Of Babylon
Epidemiology of Colorectal Polyps in Iraqi Patients
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Abstract<sec> <title>Background:

A colorectal polyp (CRP) is a growth on the lining of the colon or rectum. The incidence of CRPs is rapidly increasing with age. They are most often benign. The rectum is the most commonly affected site.

Objectives:

To determine the incidence, clinical presentation, and histopathologic types of CRP in Iraqi patients.

Materials and Methods:

It is a cross-sectional screening study conducted in the medical c

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Publication Date
Wed Mar 02 2022
Journal Name
The Iraqi Postgraduate Medical Journal
Expression of p53 in Pancreatic Ductal Adenocarcinoma
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Pancreatic adenocarcinoma is one of the major causes of cancer death in the world. Alterations in p53 tumor suppressor gene