Autor: Abdallah, F.M. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Genetic characterization of Infectious Bursal Disease Viruses isolated from the vaccinated broiler chicken flocks in Egypt during 2015-2016
Autorzy:: Abou El-Fetouh, M.S.
Abdallah, F.M.
Tematy:: IBDV
broiler
very virulent
variant
RT-PCR; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2087678.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Etiology and pathology of epidemic outbreaks of avian influenza H5N1 infection in Egyptian chicken farms
Autorzy:: Ali, A.
Elmowalid, G.
Abdel-Glili, M.
Sharafeldin, T.
Abdallah, F.
Mansour, F.
Nagy, A.
Ahmed, B.
Abdelmoneim, M.
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/30849.pdf Link otwiera się w nowym oknie
Opis:: Epidemic outbreaks of avian influenza (AI) virus H5N1 have been frequently reported in Egypt during the last nine years. Here we investigate the involvement of AI H5N1 in outbreaks of acute respiratory disease that occurred in several commercial chicken farms in Egypt in 2011, and we describe to the pathology caused by the virus in the course of the outbreak. Twenty-one chicken farms with history of acute respiratory symptoms and high mortalities were screened for AI H5N1. Virus identification was based on hemagglutination inhibition test, and PCR detection and sequencing of the hemagglutinin and neuraminidase genes. Virus distribution was determined by immunohistochemical staining of AI antigens in organs of infected birds. Standard H&E staining was performed for histological examination of affected organs. Eighty-one % of the examined birds, representing 100% of the screened farms, were positive for AI H5N1 virus. Phylogenetic analysis of the hemagglutinin and neuraminidase genes of the isolated virus reveals its affiliation to clade 2.2.1. Viral antigens were localized in the endothelial cells of the heart, liver, lungs and skin, where pathological lesions including congestion, hemorrhages, multifocal inflammation and necrosis were concurrently observed. According to the pattern of the viral antigen and lesion distribution in the visceral organs, we suggest cardiovascular and circulatory failures as the probable cause of death during these outbreaks. In conclusion, the present study further confirms the epidemic status of AI H5N1 virus in Egypt and reveals the highly pathogenic nature of the local isolates.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: New approach for the ores add-value. Case study: the physical beneficiation of white sand in El-Harra area, Bahariya Oasis, Western Desert, Egypt
Autorzy:: Fawzy, Mona M.
El-Arafy, Reda A.
Abdel, Gawad Ahmed E.
El-Zalaky, Mohammed A.
Alshamy, Abdallah S.
Ismail, Ahmed Mousad
Abdel-Azeem, Marwa M.
Roshdi, Rania
Negm, Sameh H.
Nasr, T.
Mira, Hamid E.
Mohammaden, Tarek F.
Tematy:: added value
physical beneficiation
silica index
White Sand
El-Harra
Bahariya Oasis; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Powiązania:: https://bibliotekanauki.pl/articles/58972523.pdf Link otwiera się w nowym oknie
Opis:: Integration of the remote sensing techniques including the thermal emission and reflection radiometer (ASTER) thermal infrared (TIR) data, and the silica index (SI) algorithms have enabled the discovery of a previously unknown white sand deposit in the El-Harra region of the Bahariya Oasis. The physical, chemical, and mineralogical characterization of El-Harra white sand was achieved using the binocular microscope, X-Ray Diffraction (XRD), X-Ray Fluorescence spectrometry (XRF) and Scanning Electron Microscopy (SEM). The sample was physically beneficiated using attrition scrubbing, shacking table concentration and magnetic separation while its heavy mineral content was conducted via heavy liquid separation. The chemical and grain size analysis before and after the physical treatment pointed to clear enhancing in both the chemical and grain size specifications, where the oxide ratios of SiO2, Al2O3, Fe2O3 and CaO moved from 96.87, 0.82, 0.13 and 1.27% to 99.53, 0.05, 0.05 and 0.13%, respectively. On the other hand, the ratio of grain size (–0.5/+0.125 mm) was raised from 79.48% to 82.04% from the total sample weight. Comparing these data with their corresponding in both the British and American Standard Specifications of White Sand confirmed the validity of the physical beneficiation in raising the grade of the investigated white sand from low valuable ore to the globally highest one which means higher marketing prices and the availability to use the treated white sand in a wide spectrum of technological and strategic applications. Furthermore, the heavy minerals content and species is another add value, where their content was assigned as 0.3 mass% from the head sample including ilmenite, rutile, zircon, leucoxene and green silicates. This simply means each 1000 tons of physically beneficiated white sand yield 3 tons of the heavy minerals.
Dostawca treści:: Biblioteka Nauki