Influence of working pressure and lasing energy of Al plasma in laser-induced breakdown spectroscopy

Qusay Adnan Abbas

doi:10.30723/ijp.v17i40.406

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Publication Date

Fri Mar 01 2019

Journal Name

Iraqi Journal Of Physics

Volume

17

Issue Number

40

DOI

10.30723/ijp.v17i40.406

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Influence of working pressure and lasing energy of Al plasma in laser-induced breakdown spectroscopy

LIBS

plasma characteristics

OES

electron temperature

electron density

Qusay Adnan Abbas

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Aluminum plasma was generated by the irradiation of the target
with Nd: YAG laser operated at a wavelength of 1064 nm. The
effect of laser power density and the working pressure on spectral
lines generating by laser ablation, were detected by using optical
spectroscopy. The electron density was measured using the Stark
broadening of aluminum lines and the electron temperature by
Boltzmann plot method it is one of the methods that are used. The
electron temperature Te, electron density ne, plasma frequency
and Debye length increased with increasing the laser peak
power. The electron temperature decrease with increasing gas
pressure.

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Fri Mar 01 2024

Journal Name

Nano Biomedicine And Engineering

Silver Nanoparticles Synthesized by Cold Plasma as an Antibiofilm Agent against Staphylococcus epidermidis Isolated from Acne

biofilm

cold plasma

Heba

Nisreen Kh.

Rafal H.

Maryam M.

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silver nanoparticle which synthesized by.

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(6)

Publication Date

Wed Mar 18 2020

Journal Name

Baghdad Science Journal

Differentiation of Adipose-Derived Mesenchymal Stem Cells into Neuron-Like Cells induced by using β-mercaptoethanol

Nestin

adipose cells

neurogenesis

differentiation

neurofilament

Maeda

Ahmed M.

Rafal H

Aesar

Aseel

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Background: Adipose derived-mesenchymal stem cells have been used as an alternative to bone marrow cells in this study. Objective: We investigated the in vitro isolation, identification, and differentiation of stem cells into neuron cells, in order to produce neuron cells via cell culture, which would be useful in nerve injury treatment. Method: Mouse adipose mesenchymal stem cells were dissected from the abdominal subcutaneous region. Neural differentiation was induced using β-mercaptoethanol. This study included two different neural stage markers, i.e. nestin and neurofilament light-chain, to detect immature and mature neurons, respectively. Results: The immunocytochemistry results showed that the use of β-mercaptoethanol resulted in

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(4)

Publication Date

Tue Sep 01 2020

Journal Name

Clinical Plasma Medicine

Breast cancer treatment using cold atmospheric plasma generated by the FE-DBD scheme

Ban H.

Ahmed Majeed

Hamid H.

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Background Cold atmospheric plasma (CAP) is widely used in the cancer therapy field. This type of plasma is very close to room temperature. This paper illustrates the effects of CAP on breast cancer tissues both in vivo and in vitro. Methods The mouse mammary adenocarcinoma cell line AN3 was used for the in vivo study, and the MCF7, AMJ13, AMN3, and HBL cell lines were used for the in vitro study. A floating electrode-dielectric barrier discharge (FE-DBD) system was used. The cold plasma produced by the device was tested against breast cancer cells. Results The induced cytotoxicity percentages were 61.7%, 68% and 58.07% for the MCF7, AMN3, and AMJ13 cell lines, respectively, whereas the normal breast tissue HBL cell line exhibited very li

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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

Sat Jan 01 2022

Journal Name

Journal Of The Mechanical Behavior Of Materials

Performance of concrete thrust block at several burial conditions under the influence of thrust forces generated in the water distribution networks

Murtadha Hardan

Amer Farouq

Basim Hussien

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AbstractThis study was prepared to investigate the performance and behavior of concrete thrust blocks supporting pipe fittings. In the water distribution networks, it is always necessary to change the path of the pipes at different degrees or to create new branches. In these regions, an unbalanced force called the thrust force is generated. In order to counter this force, these regions are supported with concrete blocks. In this article, the system components (soil, pipe with its bend and thrust blocks) have been numerically modeled and simulated by the ABAQUS CAE/2019 software program in order to study the behavior and stability of the thrust block with different burial conditions (several b ... Show More

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(1)

Publication Date

Wed Apr 01 2020

Journal Name

Canadian Journal Of Physics

Influence of the variation in the Hubbard parameter (U) on activation energies of CeO2-catalysed reactions

Hussein A.

Mohammednoor

Zainab N.

M. Mahbubur

Mansour H.

Zhong-Tao

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Accurate description of thermodynamic, structural, and electronic properties for bulk and surfaces of ceria (CeO₂) necessitates the inclusion of the Hubbard parameter (U) in the density functional theory (DFT) calculations to precisely account for the strongly correlated 4f electrons. Such treatment is a daunting task when attempting to draw a potential energy surface for CeO₂-catalyzed reaction. This is due to the inconsistent change in thermo-kinetics parameters of the reaction in reference to the variation in the U values. As an illustrative example, we investigate herein the discrepancy in activation and reaction energies for steps underlying the partial and full hydrogenation of acetyl

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(12)

(11)

Publication Date

Fri Feb 01 2019

Journal Name

Journal Of Economics And Administrative Sciences

Specification and charateristics manager in general hospitals Asurvey Study in Al-Rusafa Health Directorate Hospitals

director specifications -manager properties -general hospitals

علي حسون

كريم بهار

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Abstract

This current study aims to know the characteristics of the doctors’ impact on success “doctors who work as managers specifically”.

The sample contains from (60) doctors work in the three hospitals in Baghdad, The data collected with questionnaire, the main personnel characteristics the desire to work as hospitals managers. The study contains three chapters. The first is to the theoretical, background. The second is methodology and the third is the data analysis and also explains the results and conclusions and the recommendations. Specification and characteristics manager in general hospitals

A survey Study in Al-Rusafa Health Directorate Hospitals

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Publication Date

Wed Dec 01 2021

Journal Name

Journal Of Physics: Conference Series

Evaluation the Safety and Security Procedures used In X-ray Clinics in Al-Harthiya-Baghdad

Thuraya

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AbstractRadiation is a form of energy, its emitted either in the form of particles such as α-particles and β-particles (beta particles including the electron and the positron) or waves such as sunlight, X-rays and γ-rays. Radiation found everywhere around us and it comes from many different sources naturally or man-made sources. In this study a questionnaire was distributed to people working in the field of X-rays that used for a medical imaging (X-ray and CT-scan) to evaluate the extent of awareness and knowledge in estimate the damage of ionizing radiation as a result of wrong use. The questionnaire was distributed to medical clinics in Al-Harithiya in Baghdad, which it’s considered as ... Show More

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(2)

(1)

Publication Date

Thu Jan 24 2019

Journal Name

Al-kindy College Medical Journal

Bacterial Profile and Antimicrobial Susceptibility in Neonatal sepses, Al -Alwyia Pediatric Teaching Hospital in Baghdad

Early onset sepsis (EOS)

Late onset sepsis (LOS)

Neonatal Sepsis

antimicrobial resestance

Tareef Fadhil

Assad Muhsen

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Background: Neonatal septicemia is a major health problem in developing countries furthermore data on bacteriological profile in early onst sepses (EOS) and late neonatal sepsis (LOS) are lacking in context of continuous change in bacteriological profile and increasing resistant strains. Objectives: The study done to determine the pattern of organisms implicated in neonatal septicemia in a neonatal care unit and to measure the degree of bacterial resistance to some antibiotics.

Type of the study : cross –sectional study.

Methods: Confirmed cases of neonatal septicemia admitted at Al-Alwyia pediatric teaching hospital for the period from January 20

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(1)

Publication Date

Fri Apr 30 2021

Journal Name

Al-kindy College Medical Journal

Knowledge and Attitude of Family Doctors Regarding the Provision of Psychological Health Care in Primary Health Care Centers in Baghdad Al-Karkh

knowledge and attitude

psychological health care

primary health care centers

Al-Karkh district

Baghdad

family doctors

Hassanein M.

Reem J.

Sally Alaa

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Background: Mental health is integrated into PHC as a strategy of WHO to fill the gap in mental health treatment. Part of this strategy needs a level of task shifting so that mental health care is provided by different level of PHC workers and not only specialists such as psychiatrists and psychologists.

Objectives: To assess the knowledge and attitudes of family doctors regarding the provision of psychological health in PHCC and if there is an association between the certificates of these family doctors and their Knowledge and attitudes to psychological health.

Subjects and Methods: A cross-sectional descriptive study with analytic elements was conducted in 8 famil

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