Omar Emam

Omar Emam
كلية التربية النوعية - جامعة بنها · الاقتصاد المنزلى

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16
Publications
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170
Citations
Citations since 2017
0 Research Items
22 Citations
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201720182019202020212022202301234
201720182019202020212022202301234
201720182019202020212022202301234
Introduction
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Publications

Publications (16)
Article
Powdered black pepper from Egyptian markets, was irradiated with different recommended doses of gamma rays (5.0 and 10.0 kGy) and with microwaves for different periods (20, 40 and 75 s) to improve its hygienic quality. The most common bacterial isolates were of three genera Bacillus, Clostridium and Micrococcus (7.5 x 10(6)), whereas the predominan...
Article
Powdered black pepper from Egyptian markets, was irradiated with different recommended doses of gamma rays (5.0 and 10.0 kGy) and with microwaves for different periods (20, 40 and 75 s) to improve its hygienic quality. The most common bacterial isolates were of three generaBacillus, Clostridium andMicrococcus (7.5 106), whereas the predominant fung...
Article
This experiment was carried out on Egyptian semi-dried date fruits “El-Seidi CV.” which are used to process paste of dates. It is aimed to compare the effect of irradiation (1.5, 3.0 kGy) and fumigation with methyl bromide (MB) on physical, chemical and mycological characters, especially production of aflatoxins during storage of the dates for long...
Article
Two currently operating international X-ray observatories MIR-KVANT and GRANAT are caring a number of coded mask telescopes with imaging capabilities in wide energy range from 2 up to 1300 keV. The Galactic Center region is the highest priority target for these instruments. Their results in 1988–1990 demonstrate the efficiency of coded mask telesco...
Article
We describe the design, construction and performance of a novel type of position sensitive multiwire proportional counter intended for use in a proposed coded mask all-sky X-ray monitor. The sensitive volume is in the form of a cylindrical shell inside a tubular carbon fibre window. The electronic system uses multichannel preamplifier chips develop...
Article
It is reported that a new transient X-ray source, KS 1947 + 300, was discovered through observations of the GS 2023 + 338 field. The observations took place on June 8, 1989. The average flux in the 2 - 27 keV band was equal to 70 + or - 10 mCrab at that time. Thereafter the flux from the source decreased and, by August 19, the upper limit (3 sigma)...
Article
The results of the Large Magellanic Cloud (LMC) observations in the 2 to 30 keV band by the coded mask imaging spectrometer instrument of the Mir-Kvant X ray observatory are presented. The observations were performed during the period Nov. 1988 to Jun. 1989. An upper limit on the flux from supernova SN1987A is found to be 0.6 mCrab in this band. Th...
Article
Details of five X ray bursts seen during a survey of the galactic bulge are presented. They were made with the coded-mask imaging X ray spectrometer between Oct. 1988 and Apr. 1989. The bursts are shown to originate from the previously known burst sources 1702-429, 1728-337 and from close to SLX1744-299. The results which showed that there are in f...
Article
Results of LMC observations in the 2-27 keV band on the Kvant X-ray observatory are presented. The flux from SN 1987A is found to be 0.6 mCrab in this band. Spectral observations of LMC X-1, LMC X-2, LMC X-3, and PSR 0540-693 are reported.
Article
Full-text available
This paper presents a high performance Data Processing Unit (DPU) with a SpaceWire RMAP Interface. Over 1000 MIPS / 800 MFLOPS performance at 800 MHz CPU clock is achieved with a high performance PowerPC CPU. The DPU has three SpaceWire links operating at up to 100 Mbits/s, two of which with RMAP. These are used to connect the DPU to other SpaceWir...

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