ISSN: 1817-2695

Volume 36, Issue 1

Volume 36, Issue 1, Winter 2010, Page 1-64


The Electronic Excitations of the Desorbed Species Throughout Sputtering Process

H. B. Salman and J. M. Al-Mukh; A. R. Ahmed

Journal of Basrah Researches (Sciences), Volume 36, Issue 1, Pages 1-18

In the present work , theoretical study is presented to calculate the neutralization probability throughout the ground state channel and the neutralization probability throughout the excited state channel for the desorbed particle throughout the sputtering process . The Hamiltonian that describes the system is written taking into account the ground and the excited states of the sputtered particle. We get use of Heisenberg equations of motion to derive the equations of motion that describe the system . To simplify the solution of the equations , wide band approximation is used then the law of charge conservation is investigated . The equations are solved numerically and the sputtered atom – surface interaction is investigated along its classical trajectory as it goes far away from the surface . Extended model parameterization is presented to check the general features of sputtered atom – surface interaction and the concept of interference energy is discussed . Our treatment is applied to real system , that is the sputtering of atom from polycrystalline silver surface . The neutralization probabilities throughout ground state and the excited state channels are calculated as a function of time , the normal velocity component of the sputtered atom and for different values of the strength of interaction that related to the electronic structure of sputtering region . The results we get show qualitative agreement with the experimental data and with results of the de – excitation model . These results are emploied to calculate the photon yield as a function of the sputtering atom’s normal velocity component and for different values of interaction strength .

Anatomy study of adventitios buds of date palm (Phoenix dactylifera L.) c.v Barhi in vitro

Aqil.A.S.Al -Khalifa Usama N.J.Al-meer

Journal of Basrah Researches (Sciences), Volume 36, Issue 1, Pages 31-37

Vegetative micro propagation of date palm (Phoenix dactylifera L.) has been established through formation of adventitious buds from culture of white nodular callus in synthetic media containing high level of the cytokinin (2ip)(5 and 10 mg/l)for 6 months. Histological examination of the adventitious buds formation revealed the nodules in the subculture masses to be a pro buds initiated from meristematic cells located in the superficial layers of the organogenesis callus,it was found that buds initiated from compact aggregates cells proliferate through successive divisions into bipolar structures which appear as free nodules embedded in the callus mass. Upon transferring the buds formation tocultured on nutrient medium of (MS)salts full strength supplemented 30 g/l sucrose,0.25 g/l ctivated charcoal ,7 g/l agar,(1,2) mg/l NAA and cytokinins (2iP)(5,10)mg/l. completed their growth and developed into entire plantlets.

Effect of spraying with zinc Fe mixture and growth seasons on growth and flowers of Rosa hybrida L .c v. sultani .

Sammera Mohamed Salih Al-samaraee

Journal of Basrah Researches (Sciences), Volume 36, Issue 1, Pages 52-58

The object of study was to in vestiges the effect of spraying of Zinc and Fe-mixture at concentration(0+0,20+20,40+40,60+60)
mg/Land growth seasons(autumn and spring) on growth and flowers of
Rosa hybrida L.cv. sultani . A results of this study that the;

1-Plants treated with Zinc and Fe- mixture at concentration 20+20 and 40+40 mg/L showed increase significant on all vegetative growth ,flowering, nitrogen, phosphorus and potassium .

2-The results showed significant increase for the plants grown during the autumn season in plant height, length of the flower stem ,diameter of flower ,fresh and dry weight of flower .while plant grown during the spring season gave significant increase in the number of branches ,leaves ,flowers ,hastening and reduced in the number of days to initiation and development .

3-The interaction between the Zinc and Fe- mixture and growth season showed significant increase in plant height, length of the flower stem ,diameter of flower ,fresh and dry weight of flower .While the interaction between the growth season and Zinc and Fe- mixture gave significant increase on number of branches ,leaves flowers and also hastening reduced in the number of days to flower bud and development.

Determination of Nitrate, Nitrite and Chloride in Ground water of Some Wells / Basrah, South of Iraq

Ala; Muayad H.Mohammed; a A. Mizhir and Ammar Kadhim Al-Ba

Journal of Basrah Researches (Sciences), Volume 36, Issue 1, Pages 59-64

A survey is done to estimate the nitrate in the underground water of some wells in the South of Iraq (Khor Al–Zubair , Zubair and Safwan) during November 2008 . Twenty wells were selected with different depths ranged 7–12 m in Khor Al–Zubair and 17–25 m in Safwan and Al–Zubair. The aim of this study is the evaluation of ions of nitrate, nitrite and chloride by using the portable conductivity meter then measuring electrical conductivity in the field depending on samples from Shatt Al–Arab as control samples. The values recorded within this study were 98 mg.l-1 for nitrate and 2750 mg.l-1for chloride in wells with low depths. Low values were recorded 15–100 mg.l-1 for nitrate and 500–3000 mg.l-1 for chloride in wells with high depths. The recorded values were more than the allowed values and which indicated that ground waters are polluted with nitrate.