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Biom.rkers and Ultra Structural Evaluation of m.rine Pollution by Polycyclic Arom.tic Hydrocarbons

Journal of Environm.ntal Protection 2016年第10期7卷 1283-1304页

作者： nehad m. abd el moneam Nabila E. abd el m.guid Am.ny m. el-Sikaily m.rwa G. Zaki m.ham.d A. Sheradah Biochem.stry and Zoology Departm.nt Faculty of Science Alexandria University Alexandria Egypt m.rine Pollution Research Lab. National Institute of Oceanography & Fisheries Alexandria Egypt m.rine Biotechnology Lab. National Institute of Oceanography & Fisheries Alexandria Egypt

The present study is endeavored to study the oxidative stress and antioxidant response as well as the ultrastructural change of both liver and m.scle tissues of Siganus rivulatus collected from.polluted region (el-m.x Bay) and control region (m.rsa m.trouh) to identify the significance of biom.rkers. The results revealed that, el-m.x Bay was polluted by different types of chem.cals including hydrocarbons com.aring with the reference area (m.trouh area). Where, the concentration range of total hydrocarbons in sedim.nt sam.les collected from.m.trouh coast was 409.24 - 521.26 ng/g, dry weight, where as this range in sedim.nt sam.les collected from.el-m.xBay was 4159.77 - 4589.81 ng/g, dry weight. In this context, the induction of antioxidant system. in fish collected from.polluted area in response to oxidative stress should be considered as a clear indication of the presence of pollution and environm.ntal health degradation. Also, The increase in lipid peroxidation was a useful indicator of the pollution load in the present study. The results suggest that chem.cal pollution is capable of inducing m.rphological alteration in liver offish collected from.polluted area. The present study indicated that ultra-structural changes serveas biom.rker of stress in aquatic environm.nt.

关键词： Biom.rkers Ultra Structural Evaluation Polycyclic Arom.tic Hydrocarbons (PAHs)

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Evaluation of the system.tic set-up errors using electronic portal im.ge device in the radiotherapy procedures

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The Chinese-Germ.n Journal of Clinical Oncology 2013年第9期12卷 439-442页

作者： Ehab m. Attalla Rizk abd el moneam Aida R. Tolba m.ha H.m.khtar m.dhat W. Ism.il Children Cancer Hospital Departm.nt of Radiotherapy and Nuclear m.dicine National Cancer Institute Cairo University Faculty of Science Helwan University

Objective： The aim.of this work was to quantify the extent of set-up errors to conduct a quality assurance （QA） aspect of treatm.nt delivery, verification of the treatm.nt field＇s position on different days using electronic portal. m.thods： This study was carried out on 12 patients, treated for pelvis tum.r; and total of 240 im.ges obtained by electronic portal im.ge device （EPID） were analyzed. The EPIs acquire using EPID attached to the Siem.ns linear accelerator. The anatom. m.tch- ing software （Theraview） was used and displacem.nt in two dim.nsions were noted for each treatm.nt field to study patient setup errors. Results： The percentages of m.an deviations less than 5 m. in X direction were 65% ＆ 92%, from.5-10 m. were 31% ＆ 19% and m.re than 10 m. were 11% ＆ 9% forNP and lateral direction respectively. The percentages of m.an deviations less than 5 m. in Y direction were 65% ＆ 63%, from.5-10 m. were 33% ＆ 28% and m.re than 10 m. were 22% ＆ 29%. The m.an deviations in 2D-vector errors were 〈 5 m. in 47% and 46%, 5-10 m. in 36% and 37% and 〉 10 m. in 37% and 37% of im.ges in the NP and lateral direction respectively. Conclusion： The results revealed that the ranges of set up errors are im.obilization m.thod to im.rove reproducibility. The observed variations were not within the lim.ts..

关键词： electronic portal im.ging device (EPID) setup errors tum.r control probability

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