Structure dependence of gamma ray irradiation effects on polyurethane and epoxy resin studied by PAL technique

Hayder S. Hussain

doi:10.30723/ijp.v13i27.274

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Publication Date

Mon Feb 04 2019

Journal Name

Iraqi Journal Of Physics

Volume

13

Issue Number

27

DOI

10.30723/ijp.v13i27.274

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Structure dependence of gamma ray irradiation effects on polyurethane and epoxy resin studied by PAL technique

Polyurethane

Epoxy resin

PAL technique.

Hayder S. Hussain

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Positron annihilation lifetime (PAL) technique has been employed to
study the microstructural changes of polyurethane (PU), EUXIT 101
and epoxy risen (EP), EUXIT 60 by Gamma-ray irradiation with the
dose range (95.76 - 957.6) kGy. The size of the free volume hole and
their fraction in PU and EP were determined from ortho-positronium
lifetime component and its intensity in the measured lifetime spectra.
The results show that the irradiation causes significant changes in the
free volume hole size (V_h) and the fractional free volume (F_h), and
thereby the microstructure of PU and EP. The results indicate that
the γ-dose increases the crystallinity in the amorphous regions of PU
and increase the cross-linking of EP.

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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

Tue Aug 01 2017

Journal Name

Journal Of Multidisciplinary Engineering Science And Technology (jmest)

Study The Influence Of Sn Dopant On The Surface Topography And Some Physical Properties Of CdSe Films Prepared By Evaporation Technique

Tahir

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Publication Date

Fri Mar 20 2020

Journal Name

Plant Archives (09725210) 20 (2)‏

Influence of some factor on somatic embryos induction and germination of date palm CV barhi by using cell suspension culture technique.‏

Moayad Rajab Abood

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Publication Date

Tue May 01 2018

Journal Name

Journal Of Physics: Conference Series

The Effect of Multi Wall Carbon Nanotubes on Some Physical Properties of Epoxy Matrix

Tagreed M.

Suad hammed

Entisar E.

Hadeel Abdul-Jabbar

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Publication Date

Thu Jun 29 2023

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

The Effects of Operating Variables on Efficancy of Water Disinfection by Sodium Hypochlorite Using Al-Wathba Wastewater

Water disinfection

Sodium hypochlorite

Most Probable Number Test

Selleck Model

Bashaer Mahmoud

Majid I.

Wameath S.

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The aim of this investigation was to study the impact of various reaction parameters on wastewater taken from Al-Wathba water treatment plant on Tigris River in south of Baghdad, Iraq with sodium hypochlorite solution. The parameters studied were sodium hypochlorite dose, contact time, initial fecal coliform bacteria concentration, temperature, and pH. In a batch reactor, different concentrations of sodium hypochlorite solution were used to disinfect 1L of water. The amount of hypochlorite ions in disinfected water was measured using an Iodimetry test for different reaction times, whereas the Most Probable Number (MPN) test was used to determine the concentration of coliform bacteria. Total Plate Count (TPC) was utilized in this study to

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Publication Date

Wed Oct 16 2013

Journal Name

International Journal Of Pharmacy And Pharmaceutical Sciences

Effects of mucoadhesive polymers combination on the properties of lisinpril buccal tablets prepared by wet granulation method

Ahmed A.

Laith H.

Mowafaq M.

Omar Saeb

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(4)

Publication Date

Thu Nov 08 2018

Journal Name

Iraqi National Journal Of Nursing Specialties

Evaluation the effect of burning investment and black sand materials on the surface roughness of acrylic resin denture base

heat cured denture base acrylic resin

surface roughness

polishing material

Makarem

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Objective: The aim of this study was to evaluate the effect of pumice, burning investment material
and black sand on the surface roughness of heat cure acrylic resin.
Methodology: Sixty specimens were prepared from pink heat cure acrylic resin, the specimens
where grouped into; 20 specimens which polished with pumice and water (control group); 20
specimens which polished with investment material (after burning it) and water; and 20 specimens
which polished with black sand and water. The average surface roughness of specimens after
polishing procedure had been determined by profilometer (surface roughness tester).
Results: Through the application of ANOVA and LSD tests, the result of this study showed that there
wa

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Publication Date

Fri Apr 01 2022

Journal Name

Chalcogenide Letters

The dependence of the energy density states on the substitution of chemical elements in the Se6Te4-xSbx thin film

B. A.

J. S.

Rihab Nassr

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The energy density state are the powerful factor for evaluate the validity of a material in any application. This research focused on examining the electrical properties of the Se6Te4- xSbx glass semiconductor with x=1, 2 and 3, using the thermal evaporation technique. D.C electrical conductivity was used by determine the current, voltage and temperatures, where the electrical conductivity was studied as a function of temperature and the mechanical electrical conduction were determined in the different conduction regions (the extended and localized area and at the Fermi level). In addition, the density of the energy states in these regions is calculated using the mathematical equations. The constants of energy density states are det

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(17)

Publication Date

Wed Mar 10 2021

Journal Name

Baghdad Science Journal

Preparation of phenolic resin complexes

Firyal

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in this worl three types of complexed phenolic resins were prepared using various additives such as and improving the aim of this work higher mechanical properties this work is done

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Publication Date

Wed Mar 10 2021

Journal Name

Baghdad Science Journal

toxic and accumulation effects of cadmium and lead on microeystis

fikrat m.

thaer I.

Athraa K

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The study included a statement toxicity of some heavy metals individually and collectively and the existence of plant nutrients in the center Agirenk bluish green moss growth and Askhaddm biomass as an indicator of the study, in addition to portability moss on the accumulation of the metal

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