Rise Velocity and Drag Coefficient of Collapsing Two-Phase Bubble Condensing in an Immiscible Liquid

Basma A. Abdul-Majeed

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Publication Date

Sat Jun 30 2007

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

Volume

8

Issue Number

2

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Rise Velocity and Drag Coefficient of Collapsing Two-Phase Bubble Condensing in an Immiscible Liquid

rise velocity

drag coefficient

two phase bubble

collapse of two phase bubble

Basma A. Abdul-Majeed

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Collapse of the vapor bubble condensing in an immiscible is investigated for n-pentane and n-hexane vapors condensing in cold water and n-pentane in two different compositions of glycerin- water mixture. The rise velocity and the drag coefficient of the two-phase bubble are measured.

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Publication Date

Thu Apr 20 2023

Journal Name

Ibn Al-haitham Journal For Pure And Applied Sciences

Design of New V Shaped Thermotropic Liquid Crystals containing Heterocyclic

thiazolidine-2

4-dione

heterocyclic

thermotropic LC

V liquid crystals

Athraa

Nisreen

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The characterization and design of this study of new liquid crystals with a V shape compounds containing thiazolidine-2,4-dione and 1,3-phenylene as a core unite with mesophase properties were reported. Preparation and characterization of chloroacetic acid, water, and thiourea to produce thiazolidine-2,4-dione [I] in the presence of strong hydrochloric acid. The 4-hydreoxybenzaldehyde and n-alkyl bromide were reacted with potassium hydroxide to create the n-alkoxy benzaldehyde., then the compound [I] reacted with [II]n in presence of piperidine to produce compounds [III]n. Also, converted resorcinol to a corresponding compound [IV] by refl

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(3)

Publication Date

Wed Sep 30 2020

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

Application of Emulsion Liquid Membrane Process for Cationic Dye Extraction

dye extraction

Methylene Blue (MB)

cationic dye

emulsion liquid membrane.

Manal Adnan

Wasan Omar

Huda Adil

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In the present work studies were carried out to extract a cationic dye (Methylene Blue MB) from an aqueous solution using emulsion liquid membrane process (ELM). The organic phase (membrane phase) consists of Span 80 as emulsifier, sulfuric acid solution as stripping agent and hexane as diluent.

In this study, important factors influencing the extraction of methylene blue dye were studied. These factors include H₂SO₄ concentration in the stripping phase, agitation speed in the dye permeation stage, Initial dye concentration and diluent type.

More than (98%) of Methylene blue dye was extracted at the following conditions: H₂SO₄ concentration (1.25) M, agitation

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Publication Date

Fri Sep 24 2021

Journal Name

Indonesian Journal Of Chemistry

Molecular Imprinted of Nylon 6 for Selective Separation of Procaine by Solid-Phase Extraction

Muhammed Emad

Sumayha Muhammed

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The study is based on the selective binding ability of the drug compound procaine (PRO) on a surface imprinted with nylon 6 (N6) polymer. Physical characterization of the polymer template was performed by X-ray diffraction and DSC thermal analysis. The imprinted polymer showed a high adsorption capacity to trap procaine (237 µg/g) and excellent recognition ability with an imprinted factor equal to 3.2. The method was applied to an extraction column simulating a solid-phase extraction to separate the drug compound in the presence of tinoxicam and nucleosimide separately and in a mixture of them with a recovery rate more than the presence of tinoxicam and nucleosimide separately and in a mixture of them with a recovery rate of more t

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(3)

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

Mon Jul 12 2021

Journal Name

Egyptian Journal Of Chemistry

GC-FID estimation of BTEX compounds in liquid oil resulting from catalytic pyrolysis of used tires

Dr. Muna

Sanaa

Raeda

Salam

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Thermal decomposition of used tires was studied under atmospheric pressure and thermal heating program up to 350 °C for 110-120 min in a glass reactor. The effects of using MgO or SiO2 as catalyst in the thermal pyrolysis of tires waste on the yield ratio, reaction time, initial degree of decomposition also the contents of BTEX compounds in resulting pyrolytic oil was estimated via GC-FID. The results showed that the MgO catalyst gave a gas output in proportion of 17.063%, a liquid in a proportion of 38.245% and a solid product in proportion of 44.733%, while the SiO2 catalyst gave proportions of 14.308%, 40.161% and 45.448% for gas, liquid and solid products respectively. The results revealed that the thermal pyrolysis produced minor cont

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Publication Date

Tue Jan 01 2019

Journal Name

Association Of Arab Universities Journal Of Engineering Sciences

Experimental and numerical investigation on the behavior of reinforced reactive powder concrete two-way slabs under static load

Mechanical properties of RPC

reactive powder concrete

steel fibres

steel fibres modelling

two-way slab.

Hala

Shatha

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This paper studied the behaviour of reinforced reactive powder concrete (RPC) two-way slabs under static load. The experimental program included testing three simply supported slabs of 1000 mm length, 1000 mm width, and 70 mm thickness. Tested specimens were of identical properties except their steel fibers volume ratio (0.5 %, 1 %, and 1.5 %). Static test results revealed that, increasing steel fibers volume ratio from 0.5% to 1% and from 1% to 1.5%, led to an increase in: first crack load by (32.2 % and 52.3 %), ultimate load by (36.1 % and 17.0 %), ultimate deflection by (33.6 % and 3.4 %), absorbed energy by (128 % and 20.2 %), and the ultimate strain by (1.1 % and 6.73 %). The stiffness and ductility of the specimens also increased. A

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Publication Date

Sat Oct 03 2026

Journal Name

Sciences Journal Of Physical Education

Using two types of electronic questions by applying the Quiz Creator program in the method of guided discovery and its effect on learning and maintaining a motor chain on the throat

two types of electronic questions

QUIZ CREATOR

guided discovery

throat

Ayad

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Publication Date

Mon Mar 01 2021

Journal Name

Journal Of Physics: Conference Series

Synthesis of Ag/Au (core/shell) nanoparticles by laser ablation in liquid and study of their toxicity on blood human components

Mayada A.

Falah A-H.

Ala F.

Uday M.

Sarah K.

Majid S.

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Abstract<p>Q-switch Nd: YAG laser of wavelengths 235nm and 1,460nm with energy in the range 0.2 J to 1J and 1Hz repetition rate was employed to synthesis Ag/Au (core/shell) nanoparticles (NPs) using pulse laser ablation in water. In this synthesis, initially the silver nano-colloid prepared via ablation target, this ablation related to Au target at various energies to creat Ag/Au NPs. Surface Plasmon Resonance (SPR), surface morphology and average particle size identified employing: UV-visible spectrophotometer, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The absorbance spectra of Ag NPs and Ag/Au NPs showed sharp and single peaks around 400nm and 410nm, respec</p> ... Show More

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Publication Date

Thu May 09 2024

Journal Name

Polymer Bulletin

Synthesis, characterization and investigation of liquid crystalline properties for some cross-link polymers containing melamine

Maha T.

Basma J.

Jumbad H.

Ammar H.

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(1)

Publication Date

Fri Jul 01 2016

Journal Name

Tetrahedron

Novel bent-core mesogenic of 4-amino-triazole derivatives: synthesis, characterization and liquid crystalline study

Ivan Hameed R.

Ali Hussein R.

Ziad Hussein J.

Dhafir T.A.

Alaa Hussein J.

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