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Search Results: 1 - 10 of 411215 matches for " M. Abd El-Wahab "
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Molecular identification of mango malformation pathogens in Egypt  [PDF]
Wafaa M Haggag, M Hazza, M. M Saker, M. Abd El-Wahab
Advances in Bioscience and Biotechnology (ABB) , 2011, DOI: 10.4236/abb.2011.24033
Abstract: Diagnostic tests by molecular biology is made for studying the relations among Fusarium species for linking production of proteins, degree of relationship and occurrence of malformation. Determination of proteins for isolates causing-disease by SDS-PAGE explained there’s specific band for each fungus and there are common bands among some isolates of fungi. Since, band with MW 30 KDa represented only in F. proliferatum and F. oxysporum and F. subglutinans respectively. This band considered as specific band for these isolates, which released high pathogenisity effect. RAPD–PCR markers were used to discriminate variations between Fusarium isolates and causing disease. There is specific band for each fungus which act as molecular marker for each fungus and there are some bands common among some isolates of pathogenic fungi. The dendrogram shows there is degree of relationship between F. sterilihyphosum and F. proliferatum; between F. moniliforme and F. subglutinans; between F. oxysporum and F. chlamydospore; the degree of relationship among F. subglutinans, F. proliferatum and F. sterilihyphosum and degree of relationship among F. moniliforme, F. sterilihyphosum, F. proliferatum and F. subglutinans
Mango Malformation: I. Toxin Production Associated with Fusarium Pathogens  [PDF]
Wafaa Haggag M., Hazza M., Sehab A., Abd El-Wahab M.
American Journal of Plant Sciences (AJPS) , 2011, DOI: 10.4236/ajps.2011.22030
Abstract: Eight Fusarium species i.e. F. subglutinans, F. solani, F. oxyspoum, F. sterilihyphosum, F. proliferatum, F. monili-forme, F. avena and F. chlamydspore isolated from mango malformed disease were tested for their ability to cause mango malformation disease and their production of moniliformin and total fumonisins (FB1 + FB2) using HPLC. A evaluated for moniliformin production, seven isolates were toxin producers, the production levels ranging from 0.51 to 8.90 µg/ml. The higher levels were produced by Fusarium subglutinans (8.51 µg/ml). Moderate concentrations of moniliformin was produced by F.moniliforme (6.90 µg/ml), F. oxysporum (6.30 µg/ml), F. proliferatum (4.10 μg/ml) and F. sterilihyphosum (1.10 μg/ml). Separation and identification of Fumonisin that was isolated from the pathogen- causing disease are made by (HPLC). A evaluated for total fumonisin production (FB1 + FB2), seven isolates were toxin producers, the production levels ranging from 0.10 to 8.30 µg/ml. The higher levels were produced by F. monili-forme (8.30 µg/ml. Moderate concentrations of fumonisin was produced by F .proliferatum (0.64 µg/ml) and F. subglutinans (0.50 µg/ml). Strong positive correlations between moniliformin and total fumonisins (FB1 + FB2) activities and malformation disease incidence by F. subglutinans, F. solani, F. oxyspoum, F. sterilihyphosum, F. proliferatum was observed.
Mango malformation: II. mangiferin changes associated with fusarium pathogens  [PDF]
Wafaa M. Haggag, Mahmoud Hazza, Mohamed E. Abd El-Wahab
Agricultural Sciences (AS) , 2011, DOI: 10.4236/as.2011.23038
Abstract: Mangiferin (1,3,6,7-tetrahydroxy xanthone-C2-b-D-glucoside) promoted vegetative growth and exhibited inhibitory role on the occurrence of malformation. Mangiferin changes associated with mango malformation pathogens were followed after inoculated mango seedlings (three years) with malformation pathogens i.e. Fusa-rium subglutinans, F. sterilihyphosum, F. oxysporum and F. proliferatum. Mangiferin remained at lower level in leaves of malformed shoots as compared to healthy one. The floral malformation was observed to be associated with the reduction of mangiferin. Strong positive correlations between mangiferin activity and malformation incidence were observed. Mangiferin level at panicle initiation may give a possible estimate of malformation incidence in mango.
Potential Activity of Camel Milk-Amylase and Lactoferrin against Hepatitis C Virus Infectivity in HepG2 and Lymphocytes
Esmail M. El-Fakharany,Ashraf Tabll,Abeer Abd El-Wahab,Bakry M.Haroun
Hepatitis Monthly , 2008,
Abstract: Background and Aims: To exploring which camel milk proteins, have the ability to inhibit and/or blocking the hepatitis C virus (HCV) entry and replication inside the cells system.Methods: Using human peripheral blood mononuclear cells (PBMCs) and hepG2 cells system, three experiments were setup: 1) cells treated with amylase or lactoferrin then infected with HCV; 2) HCV treated with amylase or lactoferrin then used to infect the cells; and 3) HCV infected cells were treated with amylase or lactoferrin. RNA was extracted, RT-PCR and nested PCR were run, in addition to immune-staining the cells to localize the viral molecule within the cells foci.Results: Camel milk-amylase and lactoferrin were in vitro tested the ability to inhibit the HCV entry and replication inside the human peripheral blood and hepG2. Amylase could not able to inhibit nor blocking the viral replication. However, lactoferrin demonstrate a clear ability to inhibit the viral entry into both cells system when pre-interact with the virus, but fault to protect the cells before infection. The virus replication inside the cells was completely blocked only when the infected cells were treated with lactoferrin.Conclusions: Camel lactoferrin was demonstrated a remarked in vitro ability to completely inhibit the HCV entry into PBMC, hepG2 and replication inside those cells system.
Effect of Acridine and Ascorbic Acid on Rhizobia of Legume Trees
El-Adl,Zaied K.A.,Abd El-Wahab,Nassef M.A
Pakistan Journal of Biological Sciences , 2001,
Abstract: The present study aimed to induce a great variation exists among Rhizobium spp. that nodulate Leucaena leucocephala and Sesbania sesban, through the treatment with acridine and ascorbic acid and selection of strains for efficiency of the symbiotic association appears possible. Bacteria were isolated from nodules of both hosts growing in Egyptian soil, subcultured, and verified to be rhizobia. The isolates varied significantly in their resistance to antibiotics and NaCl, their growth on different carbohydrate sources, and their effect on the pH of culture media. Most isolates showed intermediate antibiotic resistance, the capacity to use numerous carbohydrates, and a neutral to acid pH response. The mean generation times of these isolates ranged from 4.813 to 6.437 and 4.600 to 6.523 for Sesbania sesban and Leucaena leucocephala, respectively. Both acridine orange and ascorbic acid appeared genotoxic hazards effect on all rhizobial strains examined here. They demonstrated a dose-response for decreasing cell survival at the levels that are not excessively toxic to the bacteria. The standard assay with pre-incubation was quite toxic to the bacteria than plate incorporation test. Acridine orange and ascorbic acid shows an increase in the number of auxotrophic mutants over the spontaneous value this is evidence for their mutagenicity caused by DNA damage. The biochemical mutants obtained in this study were identified using nine plates of minimal medium each was supplemented with different combinations of four growth factors. From the results reported here, it can be concluded that acridine mutagenesis is due to an enhancement of mismatch repair. In addition, ascorbic acid may be mutagenic and cytotoxic through the generation of hydrogen peroxide.
Application of Modified Bagasse as a Biosorbent for Reactive Dyes Removal from Industrial Wastewater  [PDF]
Abd El-Aziz A. Said, Aref A. M. Aly, Mohamed M. Abd El-Wahab, Soliman A. Soliman, Aly A. Abd El-Hafez, V. Helmey, Mohamed N. Goda
Journal of Water Resource and Protection (JWARP) , 2013, DOI: 10.4236/jwarp.2013.57A003
Abstract:

Propionic acid modified bagasse was used for the removal of reactive yellow 2 and reactive blue 4. The effects of pH, contact time, initial dye concentrations, adsorbent particle size and adsorbent dose on the adsorption of the two dyes were investigated. Additionally, the desorption process and intra-particle diffusion were studied. Acidic pH values were favorable for adsorption of both dyes. The equilibrium adsorption data were best fitted with the Freundlich isotherm for reactive yellow 2 and the Langmiur isotherm for reactive blue 4. The values of their corresponding constants were determined. The kinetic for dye adsorption is well described by a pseudo-first order kinetic model for the reactive yellow 2 and by pseudo-second order for the reactive blue 4. The investigation revealed that the hydroxyl groups of bagasse and the carboxylic group of propionic acid play a great role in the removal of both reactive dyes.

Effect of Cichorium intybus L. on fatty liver induced by oxytetracycline in albino rats.
Eman G.E. Helal* , Samia M. Abd El-Wahab* , Atef M.Moussa Sharaf**
Egyptian Journal of Hospital Medicine , 2011,
Abstract: Background: Fatty liver is now one of the most common diseases in Egypt. People prefer to use the medicinal plants instead of using chemical compounds because they are cheap and have few side effects compared to chemical compounds.The current investigation was carried out to examine the possible potential therapeutic and protective effects of Cichorium intybus (chicory) against oxytetracyclin-induced fatty liver in an attempt to understand its mechanism of action, which may pave the way for possible therapeutic applications. Material and Methods: Albino rats were divided into two major groups, 15 rats for each. The first group was divided into three sub-groups: a) control, b) fatty liver group; that was injected intraperitonealy with oxytetracycline (120mg/kg) for three consecutive days resulting in steatosis and c) chicory treated group; which was treated with chicory water extract (70 mg/kg) for 30 days after fatty liver induction . All animals were scarified after 33 days of the beginning of the experiment. The second group was divided into three subgroups: a) control, b) fatty liver group; that was injected intraperitonealy with oxytetracycline (120mg/kg) for three consecutive days and c) drug protection group; which received chicory for 15 days before induction of fatty liver, then sacrificed after induction of fatty liver (3 days). Blood samples were collected for biochemical analysis. Liver specimens were obtained and fixed in 10% formalin for histological study. Results: Fatty liver groups showed high significant increase in serum glucose, cholesterol, triglycerides, LDL cholesterol, ALAT, ASAT, GGT, LDH, urea, creatinine and A/G ratio while total protein, albumin, globulin and HDL cholesterol were significantly decreased compared to control group. These biochemical changes were accompanied with histopathological alterations in fatty liver tissue. The treatment with chicory ameliorated most of the evaluated biochemical parameters and improved the induced degenerative histopathological changes. The pre-treatment with chicory before the induction of fatty liver gave some protection against factors that experimentally induced fatty liver. Conclusion: Chicory as diet additive is recommend for fatty liver patients or those people who have hyperlipidemic family history.
Effect of Zingiber officinale on fatty liver induced by oxytetracycline in albino rats
Eman G.E. Helal* , Samia M. Abd El-Wahab* , Atef M. Moussa Sharaf**
Egyptian Journal of Hospital Medicine , 2012,
Abstract: Fatty liver causes were markedly increased in Egyptian people throughout last years. People prefer to use the medicinal plants instead of using chemical compounds because they are cheap and have few side effects compared to chemical compounds. Ginger is a natural dietary rhizome with anti-oxidative, anti-inflammatory, and anti-carcinogenic activities. The aim of this study was to evaluate the possible potential therapeutic and protective effects of Zingiber officinale (ginger) against oxytetracyclin-induced fatty liver in an attempt to understand its mechanism of action, which may pave the way for possible therapeutic applications. Material and Methods: Albino rats were divided into two major groups, 15 rats for each. The first group was divided into three sub-groups: a) control, b) fatty liver group; that was injected intraperitonealy with oxytetracycline (120mg/kg) for three consecutive days and c) ginger treated group; which was treated with ginger water extract (125 mg/kg) for 30 days after fatty liver induction . All animals were scarified after 33 days of the beginning of the experiment. The second group was divided into three subgroups: a) control, b) fatty liver group; that was injected intraperitonealy with oxytetracycline (120 mg/kg) for three consecutive days and c) ginger protective group; which received ginger for 15 days before induction of fatty liver, then sacrificed after induction of fatty liver (3 days). Blood samples were collected for biochemical analysis. Liver specimens were obtained and fixed in 10% formalin for histological study. Results: Fatty liver groups showed high significant increase in serum glucose, cholesterol, triglycerides, LDL cholesterol, ALAT, ASAT, GGT, LDH, urea, creatinine and A/G ratio while total protein, albumin, globulin and HDL cholesterol were significantly decreased compared to control group. These biochemical changes were accompanied with histopathological alterations in fatty liver tissue. The treatment with ginger ameliorated most of the evaluated biochemical parameters and improved the induced degenerative histopathological changes. The pre-treatment with ginger before the induction of fatty liver gave some protection against factors that experimentally induced fatty liver. Conclusion: Ginger as diet additive is recommend for fatty liver patients or those people who have hyperlipidemic family history.
Effect of curcuma longa L. on fatty liver induced by oxytetracycline in albino rats.
Eman G.E. Helal , Samia M. Abd El-Wahab and Ghada A. Zedan
Egyptian Journal of Hospital Medicine , 2011,
Abstract: Background: Curcuma longa has been shown to be a potent anti-inflammatory, antioxidant and anticarcinogenic agent. The present investigation aimed at examining the possible potential protective effect of curcuma against oxytetracyclin-induced fatty liver in an attempt to understand its mechanism of action, which may pave the way for possible therapeutic applications. Material and Methods: Albino rats were divided into two major groups, 15 rats for each. The first group was divided into three sub-groups: a) control, b) fatty liver group; that was injected intraperitonealy with oxytetracycline ( 120mg/kg ) for three consecutive days resulting in steatosis and c) curcuma treated group; which was treated with curcuma ( 0.4 % of diet ) for 30 days after fatty liver induction . All animals were scarified after 33 days of the beginning of the experiment. The second group was divided into three subgroups: a) control, b) fatty liver group and c) drug protection group; which received curcuma for 15 days before induction of fatty liver, then sacrificed after induction of fatty liver (3 days). Blood samples were collected for biochemical analysis. Liver specimens were obtained and fixed in 10 % formalin for histological study. Results: Fatty liver groups showed high significant increase in serum glucose, cholesterol, triglycerides, LDL cholesterol, ALT, AST, GGT, LDH, total protein, albumin, globulin, urea and creatinine while HDL cholesterol and A/G ratio were significantly decreased compared to control group. Histopathological changes were detected in liver tissue of fatty liver rats. The treatment with curcuma ameliorated the biochemical parameters and histological changes. The pre-treatment with curcuma before the induction of fatty liver also ameliorated the results but they did not turn back to the normal values. Conclusion: It is recommend to using curcuma as diet additive for fatty liver patients or those people who have hyperlipidemic family history.
Synthesis and characterization of new diiodocoumarin derivatives with promising antimicrobial activities
Hany M. Mohamed,Ashraf H. F. Abd EL-Wahab,Ahmed M. EL-Agrody,Ahmed H. Bedair
Beilstein Journal of Organic Chemistry , 2011, DOI: 10.3762/bjoc.7.199
Abstract: A series of 6,8-diiodocoumarin-3-N-carboxamides (4–11) were prepared. Treatment of ethyl 6,8-diiodocoumarin-3-carboxylate (1) with ethyl cyanoacetate/NH4OAc gave ethyl 2-(3-carbamoyl-6,8-diiodocoumarin-4-yl)-2-cyanoacetate (12) and 2-amino-4-hydroxy-7,9-diiodocoumarino[3,4-c]pyridine-1-carbonitrile (13), and treatment with acetone in the presence of NH4OAc or methylamine gave the ethyl 4-oxo-2,6-methano-2-methyl-3,4,5,6-tetrahydro-8,10-diiodobenzo[2,1-g]-2H-1,3-oxazocine-5-carboxylate derivatives 14a,b. All compounds were evaluated for their antimicrobial activity and the compounds 12–14a,b exhibited a pronounced effect on all tested microorganisms.
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