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jih-1660
A New Biological System For Detecting Environmetal Carcinogens And /Or Mutagenes And Their Adversary
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A  new  test  system  for  detecting  environment  carcinogenes and/or  mutagenes  and  their  adversary  It  has  been  induced.  One hundred and fifty   mutants   were isolated from   the basidiomycete fungus Coprinus cinereus   which were   resistant to guanine analogue S- az.aguanine .All the spontaneous and induced with UV light origin mutants were isolated from the wild type strains Bc9/6.6 and  Hd5.5

.These mutants were te ted on selective medium containing  different

concentrations of the analogue and also to their ability to usc purine bases and their degredated  products as  a sole  nitrogene source were tested ; and their ability to grow on HAT   medium was tested . According  to  the results obtained  from these test;  mutants  were

classified into four phenotypic groups for each  iJd -type strain .

All  the  8-az.aguanine  resistant  mutants  were  d.ikaryotized   with

compatible wild strains. The dikaryons produced were unable to grow on  medium           containing        8-az.aguanine                     which               establish the recessiveness of the mutations to their respective wi ld-type alleles. Complementation   test  detcrmind  four  genes   which  controll   the resi stance  to 8- azaguaninc in Coprinus cincres   .These genes were desi gnated  azg-1, azg-2, azg'-3, azg-4.Three of these genes azg-1, azg-2 and azg'-4werc carried by Bc9/6.6 and Hl /5.5 mutants. While, azg-3 gene  was found in Bc9/6.6 mutants only.

These  genes  are determ.ind for  the  first  time  in  fungus coprinus cinereus  .

Mutants which carry azg-1  gene were characterized by their inability to use   hypozanthine and                                              guanine as a sole nitrogen source in the

medium ; their failure to grow  on HAT medium  and their resistance

to all concentrations of 8- az.aguanine used.This gene is considered to

 

 

 

 

IBN AL- HAITHAM J.FOH PURE & API'L.SCI.         VOL.19(4) 2006

 

represent  a mutation led to   lose or   modify the specificity of the enzyme hypoxauthine -guanine phosphoribosyl transferase (HGPRT) whi ch play an important role in transferring hypoxauthine and guanine to their nucleotides  by salvage pathway.

Spore analysis indi cated that azg'-1  gene locted in linkage group II

,since it gave a distance of 28 map units with the mating type gene

B.

The assessment of the cytotoxic , mutagn ic and antimutagc•tic role of

the  aqueous extract of  garl ic     (Allium  sativum  L.)  against the genotoxic effect of mitomycin - C

( MMC ) evaluate the ability of the mutagen to induce mutation in

HGPRT gene by    using the asexual spores (oidia )of Copninus cineraus for the strain AZG78 and by depending on the viabil ity and mutation rate in HGPRT gene test .To assess cytotoxity and mutagenecity of garlic extract , gradual concentrations were prepared . The concentration of choice was considered with respect to  two factors ; high survi val rate and low mutagenic  activity (similar to negative control ). To examine the antimutagenic  effects of  the extract, an interation was made between the crude  extract and the mutagen   MMC with respect to three kinds of treatments before , aOer and with mutagen . The study concentrated on two sides 1- on the toxic and /or m utagenic effect of the aqueous extract of garlic . 2 - Antimutagenic activity of the extract with respect to   the mutageen MMC . However,   this activity was dependent on the type of the treatment . The extract showed best antimutagenic activity when it was used before the mutagen , so itis considered as desmutagen to the genotox i c effects of MMC.

These data support the hypothesis that garlic compounds may be eflicacius in preventions of cancer and also we could use the HGPRT

gene as  a  sensitive biological  system  in  detecting environmental mutagenes or carcinogens and their adversary .

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Publication Date
Tue Jan 02 2018
Journal Name
Journal Of Educational And Psychological Researches
The impact of learning strategies in the collection of biology and their systemic thinking
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Research Summary The aim of the search for knowledge of the effect generative learning strategy in: 1 - Achievement of the second grade. 2 - Systemic thinking for the second grade students when studying the biology. The study sample increased (60) students distributed into two equal experimental and control groups. Prepare the test of 40 pieces of multiple choice type and prepare a test for systematic thinking according to three skills 1. Understand the relationships between the parts of the systemic form and complement the sentences given 2 - complement the relationships between parts of the systemic form 3. Building the systemic form. It was a search result 1- There is a difference of statistical significance (at level 0.05) between th

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Publication Date
Sat Apr 01 2017
Journal Name
Journal Of Economics And Administrative Sciences
strategic Vigilance and their impact in Organizational success: Exploratory Research General AL-Faris company
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Abstract

The present search addressed the "strategic Vigilance and their impact in Organizational success "Where has the objective of strategic Vigilance and Organizational success of increasing importance at the present time, for being fairly modern topics, which have a tremendous impact on the success of organizations.                                                                  &

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Publication Date
Sun Jun 05 2016
Journal Name
Baghdad Science Journal
Preparation of Unsaturated Polyester Nanocomposites and Studying Their Mechanical Properties Using some Inorganic Additives
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In this study three inorganic nano additives, namely; CaCO3, Al2O3 and SiO2 were used to prepare nanocomposites of unsaturated polyester in order to modify their mechanical properties, i.e. tensile strength, elongation, impact and hardness. The results indicated that all the three additives were effective to improve the mechanical properties up to 4% by weight. The effectiveness of them follows the order : CaCO3 > Al2O3 > SiO2 This is due to their particle size in which CaCO3 (13nm), Al2O3 (20-30nm) and SiO2 (15-20nm).

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Publication Date
Wed Nov 19 2014
Journal Name
Journal Of Biosciences
Caspase-like proteins: Acanthamoeba castellanii metacaspase and Dictyostelium discoideum paracaspase, what are their functions?
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Publication Date
Tue Jun 10 2025
Journal Name
Journal Of Physical Education
Teaching competencies and Their Relationship With Work Satisfaction of physical educators In Baghdad governorate
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The study aimed to identify the degree of teaching competencies and job satisfaction of the teachers of physical education in the province of Baghdad, and then find the relationship between them. Use the descriptive approach in the style of associative relationships, the research community represented by teachers of physical education in the departments of education Karh (first, second, third) in the province of Baghdad. (522) teachers and (324) school principals distributed in (324) medium within the administrative configurations of these directorates for the academic year (2016 - 2017). The measure (teaching competencies) included (47) words distributed across seven areas. And the measure of (job satisfaction) included (15) words. After t

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Publication Date
Tue Jun 10 2025
Journal Name
Al–bahith Al–a'alami
Public relations of Iraqi companies and their role in the marketing of national products
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based on the importance of public relations in companies, I will discussed the issue of public relations and its role in marketing national products, given what these companies represent of great importance in terms of providing products and services to large segments of Iraqi society, which necessitated the need to search and investigate the role and importance of activities that Provides public relations in Iraqi companies in all categories( public, private and mixed).
the study tables and theirinterpretations, results and recommendations, and the studyreachedseveralresults, including the positive and the negative, the positive including the success in marketing the products by the number of companies in the Fairswhere the level of

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Publication Date
Thu Dec 01 2022
Journal Name
Baghdad Science Journal
Simultaneous Ratio Derivative Spectrophotometric Determination of Paracetamol, Caffeine and Ibuprofen in Their Ternary Form
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A new, accurate, precise and economic two spectrophotometric methods for determination of Paracetamol (Par), Ibuprofen (Ibu), and Caffeine (Caf) were suggested. Those methods were the first and second ratio derivative spectrum using a double devisor. Par, Ibu, and Caf showed many useful peaks for their quantified determination. The validity of all analysis modes for determination of the three compounds, peak to baseline, peak area and peak to peak were according to ICH. The linearity of two methods was between 5 µg/ml as a lower concentration and 50 µg/ml as the highest concentration for three compounds. Recovery percentage was around 100% and relative standard deviation was less than 2.6%. The methods were applied successfully in the

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Publication Date
Wed Jun 15 2022
Journal Name
Al-adab Journal
THE SEMIOTIC COMPONENT OF LACUNS AND THEIR BASIC TYPES IN THE LANGUAGE: THEORETICAL SUBSTANTIATION
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The article attempts to provide the theoretical fundamentals for the semiotic component of lacunae in a language. The definitions of the following notions have been represented: 1) lacunarity as a complex phenomenon that works in the modes of language, speech and speech behaviour; 2) lacuna as a gap, an empty space, which lacks something, which may be characteristic of a written work. The author of the article considers the main classes of lacunae, among which are: 1) generic lacunae, which reflect the absence of a common name for a class of objects; 2) species lacunae are the absence of specific names, names of individual types of objects or phenomena; 3) intralingual lacunae are found within the paradigms of one language; 4) interlanguage

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Publication Date
Sun Apr 28 2024
Journal Name
Iraqi Journal Of Agricultural Sciences
COMPARISON OF TWO TYPES OF SENSORS AND THEIR EFFECT ON SPRAY QUALITY PEAR TREES
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This study was aimed to reduce the amount of the sprayed solution lost during trees spraying.  At the same time, the concentration of the sprayed solution on the target (tree or bush) must be ensured and to find the best combination of treatments. Two factors controls the spraying process: (i) spraying speed (1.2 km/h, 2.4 km/h, 3.6 km/h), and (ii) the type of sensor. The test results showed a significant loss reduction percentage. It reached (6.05%, 5.39% and 2.05%) at the speed (1.2 km/h, 2.4 km/h, 3.6 km/h), respectively. It was noticed that when the speed becomes higher the loss becomes less accordingly. The interaction between the 3.6 km/h speed and the type of Ultrasonic sensor led to a decrease in the percentage of the spray

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Publication Date
Sat Dec 01 2018
Journal Name
Journal Of Economics And Administrative Sciences
International Auditing Standards and their role in rationalizing the auditor's personal judgment in Iraq"
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The impact of the auditor's personal judgment starts from the beginning of the audit process to the formation of the final opinion and the issuance of the report, and because of the possibility of bias in the auditor's judgment for various reasons that may relate to the auditor himself or the circumstances surrounding it, which requires assessing the current reality of the auditor's personal judgments In the local environment and determining their determinations. To clarify the concept and determinants of the auditor's personal judgments when implementing the audit work, prepare the report and determine the role of the international auditing standards in rationalizing the auditor's personal judgment when conducti

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