Dynamics of a single Condensing Two-Phase Bubble

Basma A. Abdul-Majeed; Hussien B. Eliwy

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Publication Date

Sun Sep 30 2007

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

Volume

8

Issue Number

3

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Dynamics of a single Condensing Two-Phase Bubble

condensing bubble

two-phase bubble

dynamics of bubble

Basma A. Abdul-Majeed

Hussien B. Eliwy

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The dynamics of a single condensing two-phase bubble of two different dispersed-continuous systems were studied. The systems were, CCl₄ - water and CCl₄ - 100% glycerol. Cinephotography was used to determine the change in height, diameter and time. These results were used to determine the experimental rise velocity of the bubble, which was compared with a theoretical one based on some equations used. It was found that the velocity of the first system remained almost constant, while it decreased gradually for the second system.

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Publication Date

Tue Sep 29 2020

Journal Name

Reaction Kinetics, Mechanisms And Catalysis

Development of two-step noncatalytic esterification of waste cooking oil for biodiesel preparation

Biodiesel production · Esterifcation reaction · Waste cooking oil

Zahraa A.

Alaa K.

Israa M.

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An innovative two-step noncatalytic esterifcation technique was proposed to synthesize alkyl esters from free fatty acids simulated in waste cooking oil, as a pretreatment process for biodiesel production, without adding any catalyst under normal conditions of pressure and temperature. The efect of methanol:oil molar ratio, reaction time, mixing rate, and reaction temperature were investigated. The results confrmed that the conversion of the reaction was increased when increasing the methanol molar ratio and decreased in prolonged reaction temperature. High conversion (94.545%) was successfully achieved at optimized conditions of 115:1, 65:1 methanol:oil molar ratio in the frst step and second step, respectively, other conditions i

(7)

Publication Date

Tue Jan 17 2017

Journal Name

International Journal Of Computer Applications

Improving of Photovoltaic Cell Performance by Cooling using Two different Types of Fins

Hussein

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(5)

Publication Date

Tue Dec 20 2022

Journal Name

Bulletin Of The Iraq Natural History Museum (p-issn: 1017-8678 , E-issn: 2311-9799)

FIRST RECORD OF TWO PARASITOID WASPS OF THE FAMILY CHALCIDIDAE (HYMENOPTERA) IN IRAQ

Brachymeria

Chalcididae

Chalcis

New record

Karbala

Parasitoid.

Ali A. Kareem

Hossein Lotfalizadeh

Ayad Alsendi

Raad Kareem Aljaafari

Sienaa M. Al-Zurfi*

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The family Chalcididae (Order: Hymenoptera) is known as one of the large chalcidoid wasps with some distinct morphological characters. The first occurrence of two parasitoid species belonging to this family was reported in the Al-Husayniya district Karbala Province, Iraq; which are: Brachymeria podagrica (Fabricius, 1787) and Chalcis myrifex (Sulzer, 1776). Both species were collected by using the sweeping net from orchards during July 2020.

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Publication Date

Tue Jul 13 2021

Journal Name

Journal Of Craniofacial Surgery

Comparison of Two Botulinum Toxin Injection Methods for Treatment of Excessive Gingival Display

Hussain Adnan

Salwan Y.

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Background: Hyperfunction of the muscles of the upper lip is considered as the most common cause of excessive gingival display (EGD). The aim of this study was to demonstrate the effectiveness of botulinum toxin (BT) injection as a conservative treatment for EGD due to muscular hyperfunction and to compare the outcome of 2 injection methods. Material and methods: This study included 40 participants who were randomly assigned into 2 groups of 20 each, The first group received 2.5IU BT injection at 1 point per side (2-points group), while the second group received a total of 5 IU of BT at 2 points per side (4-points group). The outcome variables were the reduction in the central and lateral gingival display expressed as the difference between

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Publication Date

Sun Sep 25 2022

Journal Name

American Scientific Research Journal For Engineering, Technology, And Sciences

Design and Fabrication of an Electromechanical Tester to Perform Two-dimensional Tensile Testing for Flexible Materials

ncoder

Load cell

Synchronous stepper linear actuator

Two-dimensional tensile testing

Karrar A.

Furat I.

Wisam

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There are many diseases that affect the arteries, especially those related to their elasticity and stiffness, and they can be guessed by estimating and calculating the modulus of elasticity. Hence, the accurate calculation of the elastic modulus leads to an accurate assessment of these diseases, especially in their early stages, which can contribute to the treatment of these diseases early. Most of the calculations used the one-dimensional (1D) modulus of elasticity. From a mechanical point of view, the stresses to which the artery is subjected are not one-dimensional, but three-dimensional. Therefore, estimating at least a two-dimensional (2D) modulus of elasticity will necessarily be more accurate. To the knowledge of researchers, there i

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Publication Date

Tue Dec 30 2025

Journal Name

Journal Of Baghdad College Of Dentistry

A Comparison between the Horizontal Condylar and Bennett Angles of Iraqi Full Mouth Rehabilitation Patients by Using Two Different Articulator Systems (An In-Vivo Study)

Maan R

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Background: Errors of horizontal condylar inclinations and Bennett angles had largely affected the articulation of teeth and the pathways of cusps. The aim of this study was to estimate and compare between the horizontal condylar (protrusive) angles and Bennett angles of full mouth rehabilitation patients using two different articulator systems. Materials and Methods: Protrusive angles and Bennett angles of 50 adult males and females Iraqi TMD-free full mouth rehabilitation patients were estimated by using two different articulator systems. Arbitrary hinge axis location followed by protrusive angles and Bennett angles, estimation was done by a semiadjustable articulator system. A fully adjustable articulator system was utilized to locate th

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(1)

Publication Date

Mon Jan 01 2024

Journal Name

Anais Da Academia Brasileira De Ciências

Morphological study for Accipitrid birds (Accipitridforms, Accipitridae) in Iraq; part two

A part two of Accipitridae Family members that belong to three genera: Circus

Gyps

and Neophron were documented as morphometrics

distribution ranges

and conservation status were reviewed and comprehensively discussed. A total of 29 voucher specimens belong to six species which are conserved in the “Iraq Natural History Research Center and Museum INHM” as follow: Marsh Harrier Circus aeruginosus (Linnaeus

1758)

Hen Harrier Circus cyaneus (Linnaeus

1766)

Montagus Harrier Circus pygargus (Linnaeus

1758)

Pallid Harrier Circus macrourus (Gmelin

1770)

Egyptian vulture Neophron percnopterus (Linnaeus

1758)

and Griffon vulture Gyps fulfus (Hablitz

1783). The results revealed significant criteria about near threatened NT species IUCN and Birdlife International listed as Pallid Harrier Circus macrourus

and Endangered (EN) species as Egyptian vulture Neophron percnopterus globally decreasing population trend.

HIND D.

KHALIDA I.

AFKAR M.

SUHAD Y.

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Publication Date

Sun Mar 01 2020

Journal Name

International Journal Of Modern Physics E

Investigation of halo structure of neutron rich 14B, 15C, 19C and 22N nuclei in the two body model

Halo nuclei

two-body model

cosh potential.

Ahmed N.

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The two body model of (Core+n) within the radial wave functions of the cosh potential has been used to investigate the ground state features such as the proton, neutron and matter densities, the root mean square (RMS) nuclear proton, neutron, charge and mass radii of unstable neutron-rich 14B, 15C, 19C and 22N nuclei. The calculated results show that the two body model with the radial wave functions of the cosh potential succeeds in reproducing neutron halo in these nuclei.

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Publication Date

Fri Apr 01 2016

Journal Name

Journal Of Engineering

Separation of Lead (Pb2+) and Cadmium (Cd2+) from Single and Binary Salt Aqueous Solutions Using Nanofiltration Membranes

Hollow fiber membrane

Nanofiltration

Wastewater

Heavy metals

Ahmed Abed

Qusay Fadhil

Salwa Hadi

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The present work reports on the performance of three types of nanofiltration membranes in the removal of highly polluting and toxic lead (Pb²⁺) and cadmium (Cd²⁺) from single and binary salt aqueous solutions simulating real wastewaters. The effect of the operating variables (pH (5.5-6.5), types of NF membrane and initial ions concentration (10-250 ppm)) on the separation process and water flux was investigated. It was observed that the rejection efficiency increased with increasing pH of solution and decreasing the initial metal ions concentrations. While the flux decreased with increasing pH of solution and increasing initial metal ions concentrations. The maximum rejection of lead and cadmium ion

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Publication Date

Sat Jan 01 2022

Journal Name

Brazilian Dental Science

Association of matrix metalloproteinase-1-1607 1G/2G single nucleotide polymorphism genotypes with periodontitis in Iraqi population

Raghad

Hadeel Mazin

Ayser

Sarhang Sarwat

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