Effects of fear and refuge strategy dependent on predator in food web dynamics

Hussein Abdullah; Dahlia Khaled Bahlool

doi:10.28919/cmbn/8530

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Publication Date

Mon Jan 01 2024

Journal Name

Communications In Mathematical Biology And Neuroscience

Issue Number

72

DOI

10.28919/cmbn/8530

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Effects of fear and refuge strategy dependent on predator in food web dynamics

prey-predator model

cooperation

refuge

fear

scavenger

bifurction

ecology

food web.

Hussein Abdullah

Dahlia Khaled Bahlool

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Publication Date

Mon Sep 01 2025

Journal Name

The Peerian Journal

The Effect of Environmental Factors on Plant Growth: An Analytical Study of Environmental Variables and Their Physiological Response – A Review Article

Plant growth

environmental factors

photosynthesis

environmental pollutants

climate change

Sanaa

Rouya Mohammed

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The essay discusses how different environmental factors affect plant growth by explaining how each factor affects the physiological processes within the plant. The essay begins by explaining the effect of temperature on plant growth, as high or low temperatures can significantly affect the rate of photosynthesis and lead to a reduction in water and nutrient absorption. It also discusses the light intensity impacting plants because the more appropriate the light intensity is, the more enhanced the plant's photosynthesis ability, and in the excess or insufficient light condition, the growth can be inhibited. Additionally, the article outlines the effect of water shortage on the plant because this leads to the closure of stomata to avoid water

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Publication Date

Fri Mar 27 2020

Journal Name

Plant Archives 20 (supplement 1), 1666-1670‏

INFLUENCE OF SOME FACTOR ON SOMATIC EMBRYOS INDUCTION AND GERMINATION OF DATE PALM CV BARHI BY USING CELL SUSPENSION CULTURE TECHNIQUEث‏

Moayad Rajab Abood

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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

Thu Mar 01 2012

Journal Name

Journal Of Accounting And Financial Studies ( Jafs )

The Impact of Islamic Financial Inspection Thought on the Development of Inspection and comparing it with Positive Thought: Theoretical Comparative Study

إيمان شاكر

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You Mohammed, you're prophet of God and I'm Gabriel)). With this heavenly call which Mohammed, the messenger of God (may God's mercies be on him), got and when he left Hiraa cave and after getting the aye ((read with your God's name)), a new period of mankind's history started. From that time, the greatest state was established. There was no public treasury and no public financial resources at that time. Abu Baker (God bless him) spent a lot of money to support the costs of the new mission. After Al-Hijra, the bases of establishing the Islamic state were available but it lacked administrative and financial organizing. Therefore the prophet was very keen to find Islamic system which ensures justice and availability of

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Publication Date

Wed Jul 22 2015

Journal Name

Plant Growth Regulation

Effect of photosynthetic photon flux density on growth, photosynthetic competence and antioxidant enzymes activity during ex vitro acclimatization of Dieffenbachia cultivars

M.E.

YH

HN

HZ

HS

MP

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(11)

Publication Date

Sun Jan 01 2023

Journal Name

Aip Conference Proceedings

Comparison consequence of violet and red laser irradiation on the optical properties of cobalt dioxide (CoO2) thin films prepared via (SCSPT)

Mushtaq Talib

Bahaa T.

Nathera

Mohammed Sh.

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(1)

Publication Date

Mon Dec 05 2022

Journal Name

Baghdad Science Journal

Synthesis, Identification, Theoretical Study, and Effect of the New Heterocyclic System from Ciprofloxacin Derivatives on the Activity of Some Liver Enzymes

Ciprofloxacin

Liver enzymes

Mannich reactions

Spectrum

Synthesis

Amaal S.

Zahraa T.

Selvana A.

Wasan A. R.

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The target of this study was to synthesize several new Ciprofloxacin drug analogs by providing a nucleophilic substitution procedure that provides new functionality at the carboxylic group location. The analogs were synthesized, designed, and characterized by ¹HNMR, and FTIR. The synthetic path began from the reaction of ciprofloxacin drug with morpholine to give compound[B], ciprofloxacin derivative was linked with a variety of primary and secondary amines to give compounds[B1-B9]. The above-mentioned prepared compounds [B3 and B5] were applied to liver enzymes, and the increase in the activity of these enzymes was observed. In addition, a theoretical study was conducted to study the energies and properties of the prepared co

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(2)

Publication Date

Mon Nov 18 2024

Journal Name

Molecular Crystals And Liquid Crystals

Synthesis and liquid crystal properties of a new class of calamitic mesogens based on twin 1,3,4-thiadiazole derivatives with imine linkage

Ivan Hameed R.

Jumbad H.

Ammar H.

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(2)

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

Wed Sep 15 2021

Journal Name

Journal Of Baghdad College Of Dentistry

The effect of contact time between alginate impression material and type III dental stone on the surface properties of stone casts

Suha F

Atyaf M

Najwah Y

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Background: Alginate impression material is the irreversible hydrocolloid material that is widely used in dentistry. The contact time between alginate and gypsum cast could have a detrimental effect on the properties of the gypsum cast. The objective of this study is to evaluate the impact of various contact time intervals of Alginate impressions & type III dental stone on surface properties of stone cast. Materials and Methods: Time intervals tested were 1hour, 6 hours and 9 hours. Surface properties of stone cast evaluated were surface detail reproduction, hardness and roughness. Surface detail reproduction was determined using cylindrical brass test block in accordance with ISO 1563. Surface roughness was measured by profilometer

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