Studying the optical properties of ( Cr2O3:I ) thin films prepared by spray pyrolysis technique

Gailan Asad Kazem

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Publication Date

Tue May 01 2012

Journal Name

Iraqi Journal Of Physics

Volume

10

Issue Number

17

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Studying the optical properties of ( Cr2O3:I ) thin films prepared by spray pyrolysis technique

Cr2O3 thin film

optical properties of Cr2O3

spray pyrolysis

Gailan Asad Kazem

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Undoped and Iodine (I)–doped chrome oxide (Cr2O3)thin films have been prepared by chemical spray pyrolysis technique at substrate temperatures(773K) on glass substrate. Absorbance and transmittance spectra have been recorded as a function of wavelength in the range (340-800 nm) in order to study the optical properties such as reflectance, Energy gap of allowed direct transition, extinction coefficient refractive index, and dielectric constant in real and imagery parts all as a function of wavelength. It was found that all the investigated parameters affect by the doping ratios.

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Publication Date

Tue Dec 01 2020

Journal Name

Al-khwarizmi Engineering Journal

Studying the Radial and Tangential Velocity Components of the Epithelization Healing Post Photorefractive Keratectomy Surgery of the Human Eye

Nebras H.

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Photorefractive keratectomy (PRK) is the refractive technique that began with a physical scraping of the epithelial layer of cornea subsequent by laser treatment. Post this procedure to about 48 hours the removed epithelial layer regenerated to protect the eye again. The regeneration process (called re-epithelization) started from the limbus of the cornea toward the central part of it. The re-epithelization mechanism consists of a change in cell density (mitosis) and cell concentration (migration) with a velocity in two directions: radial and tangential. In the present study, an estimation for both radial (responsible for the overlapped layers toward the outward direction of the cornea) and tangential comp

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Publication Date

Wed Feb 20 2019

Journal Name

Political Sciences Journal

The Earidler the earliey shiaa polifical thought studying on the Al- sheikh Al-tossy political ideas

أ.م.د.جواد كاظم

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Abstract This research deals with the Al-Tossy contribution Islamic government and explain the directions of early shiaa political thoughts and knowing the opinions of Al-Shakh Al- Tossy in the Islamic Government

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Publication Date

Mon Apr 01 2019

Journal Name

Biochem. Cell. Arch

Improvement the surface properties of metal valves used in agriculture engine by using CO<inf>2</inf> laser beam

Sameer K. Fayyadh1

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(9)

Publication Date

Sun Jan 01 2017

Journal Name

Food And Nutrition Sciences

Optimization of Culture Conditions to Produce Phytase from &lt;i&gt;Aspergillus tubingensis SKA&lt;/i&gt;

Samar S.

Khalida A.

A. B.

Marie K.

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The effects of nutrients and physical conditions on phytase production were investigated with a recently isolated strain of Aspergillus tubingensis SKA under solid state fermentation on wheat bran. The nutrient factors investigated included carbon source, nitrogen source, phosphate source and concentration, metal ions (salts) and the physical parameters investigated included inoculum size, pH, temperature and fermentation duration. Our investigations revealed that optimal productivity of phytase was achieved using wheat bran supplemented with: 1.5% glucose. 0.5% (NH4)2SO4, 0.1% sodium phytate. Additionally, optimal physical conditions were 1 × 105 spore/g substrate, initial pH of 5.0, temperature of fermentation 30˚C and fermentation dura

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(8)

Publication Date

Thu Jan 01 2015

Journal Name

Journal Of Plant Interactions

Photosynthetic and biochemical characterization of in vitro-derived African violet (<i>Saintpaulia ionantha</i>H. Wendl) plants to ex vitro conditions

Yaser Hassan

Mohammed El-Sayed

Hanady Salim

Hail Z

Jaime A Teixeira

Michael P

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(19)

Publication Date

Mon Apr 06 2020

Journal Name

August

INFLUENCE OF SOME FACTOR ON SOMATIC EMBRYOS INDUCTION AND GERMINATION OF DATE PALM CV BARHI BY USING CELL SUSPENSION CULTURE TECHNIQUE

This study was done to examine different concentrations of mercuric chloride (Hgcl2) for Explants sterilization and different concentration of NAA) mg/L with 2iP for their effect on initiation primary callus and subsequent embryogenesis in Phoenix dactyliferae cultivar Barhi. Leaf primordial and shoot tips were excised from 2-3 years old offshoot. The result showed that contamination percentage decreased with an increase in concentration of Hgcl2 for two explants where in the control (0.0)% gave highest value 75% and 62.5% of contamination for leaf primordial and shoot tip respectively while the addition (0.1)% gave a significant decrease 37.5 and 0% for explants respectively. The Explants were inoculated onto Murashiege and Skoog

1962 (MS) medium supplemented with 2iP 3mg/L and containing 0

25

50 or 100 mg/L of NAA

the addition (50) mg/L of NAA gave highest value 68.8% in percentage of callus initiation with significant difference from addition 0% gave lowest value (18.8)%

as well Explants of shoot tip gave significant difference was 53.1% while leaf primordial gave 28.1%

Primary callus was transferred to fresh MS medium containing (0

5

10 and 20) mg/L of NAA with 3mg/L 2iP

Results were recorded after 12 weeks. A highest value of embryonic callus induction percentage or fresh weight and dry weight 87.5% or 1.56g and 0.47g for the character respectively for the treat 20 mg/L while control treatment 0.0 gave the lowest value 12.5% or 0.37g and 0.14g for same character respectively. Inoculated 1g fresh biomass into a 250 ml Erlenmeyer flask containing 50 ml MS liquid medium supplemented with NAA 20mg/L and agitated at 150 rpm by shaker to making suspension culture the measurements of packed cell volume ( pcv) or fresh and dry weight taken weekly for 12 weeks

maximum values were reached in the eighth week of PCV and fresh weight but the dry weight reached to highest value in seventh week

then the curve began to decline gradually until it reached stability in the last two weeks. The cell suspension was Diluted to different initial cell density of 100

500

10000

50000 and 100000 cells /ml with hemocytometer. The initial cell number of (10000) cells gave significant different of plating efficiency PE (11.6)% while (100) cells gave lowest value 1.8% of PE.

Ali A.

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Publication Date

Fri Feb 28 2020

Journal Name

Neuroquantology

Using X-Ray Films for Evaluation efficiency of Unsaturated Polyester Reinforced by Lead Oxide as Shielding for Medical X-ray Devices

Auday T.

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The largest use of x-ray in medical by dentists, employers or persons that needed by patients with specific conditions, lead to higher exposure of x-ray that may cause many diseases. In the present work radiography films have been used in evaluating the efficiency of using unsaturated polyester polymer reinforced with lead oxide (PbO) as shield material for medical x-ray devices, many parameters studied like concentration and thickness that they are increasing the attenuation of x-ray in them. The results show that the attenuation of X-ray increasing with concentration of reinforced material and with thickness, and the optical density decreases with increasing concentration from 0% to 50%, we chose 30% as suitable concentration to increase

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Publication Date

Sat Jun 02 2018

Journal Name

American Academic Scientific Research Journal For Engineering, Technology, And Sciences

Girder Load Share for the Curved I-Girder Bridge Subjected to the Point Load

Amer

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Publication Date

Thu Jun 02 2016

Journal Name

American Scientific Research Journal For Engineering, Technology, And Sciences

Girder Load Share for the Curved I-Girder Bridge Subjected to the Point Load

A. M.

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The objective of this research is to study experimentally and theoretically the girder vertical load share of the curved I-Girder bridges subjected to the point load in addition to the self-weigh and supper imposed dead loads. The experimental program consist of manufacturing and testing the five simply supported bridge models was scaled down by (1/10) from a prototype of 30m central span. The models carriageway central radii are 30 m, 15m or 10m. The girder spacing of the first two models is 175 mm with an overall carriageway width of 650mm. The girder spacing of the other three bridge models is 200mm with the overall carriageway width of 700 mm. The overall depth of the composite section was 164 mm. To investigate the effect of live load

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Publication Date

Wed Jun 30 2004

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

Studying the Factors Effects on the Flowability of ZnO-CuO/γAl2O3 Catalyst Through Hopper Before Tableting Process

Malek M.

Mazin A.H.

Ali Y.

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