Mohamed El-Mogy | Cairo University (original) (raw)

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Papers by Mohamed El-Mogy

Research paper thumbnail of Effect of active and passive modified atmosphere packaging on quality attributes of fresh cut red cabbage

Research paper thumbnail of Effect of Hot Water Dips and Modified Atmosphere Packaging on Extend the Shelf Life of Bell Pepper Fruits

Research paper thumbnail of Influence of compost, amino and humic acids on the growth, yield and chemical parameters of strawberries

Journal of medicinal plant research

Research paper thumbnail of Field evaluation of some biological formulations against Thrips tabaci (Thysanoptera: Thripidae) in onion

World Applied Sciences Journal

Research paper thumbnail of Improving Strawberry fruit storability by edible coating as a carrier of thymol or calcium chloride

The aim of this study was to improve strawberry fruit storability by testing the effect of edible... more The aim of this study was to improve strawberry fruit storability by testing the effect of edible coating with soy or wheat gluten protein as a carrier of thymol, which mainly presents in the essential oil of thyme plants and calcium chloride on quality of strawberry fruits. Thymol and calcium chloride were applied during preparing the edible coating film. Coating fruits with thymol carried by soy protein or white gluten and CaCl 2 carried by soy protein showed the lowest weight loss percentage. Treating fruits with thymol carried by soy protein or white gluten did not exhibit any change in fruit appearance until 9 days of storage. All treatments maintained ascorbic acid content, firmness, TSS, total sugar and reduced the total colony, molds and yeasts compared to control. Fruits coated with thymol carried by soy protein or white gluten was the most effective treatments. In addition, coating fruits with thymol carried by soy protein or white gluten recorded the lowest values of anthocyanin, higher chroma and higher hue angle compared to control fruits.

Research paper thumbnail of Impact of Bio- and Organic Fertilizers on Potato Yield, Quality and Tuber Weight Loss After Harvest

Potato Research, 2014

ABSTRACT

Research paper thumbnail of Prevalence of Escherichia coli O157:H7 on spinach and rocket as affected by inoculum and time to harvest

Scientia Horticulturae, 2014

Irrigation water is an important vehicle for dissemination of human pathogens to plants. As conta... more Irrigation water is an important vehicle for dissemination of human pathogens to plants. As contamination in an early stage of the production chain cannot necessarily be counteracted later, cultural measures to reduce the contamination risk need to be adopted during primary production. In a two-factorial greenhouse experiment, we studied the impact of inoculum density and the interval between irrigation and harvest on the prevalence of an inoculated gfp-tagged non-pathogenic strain of Escherichia coli O157:H7. The strain was inoculated with the irrigation water at a density of log 5.6, log 6.6 and log 7.6 CFU ml −1 into the phyllosphere of fully grown crops of rocket and spinach (BBCH 49). The crops were then harvested after 3, 24, 48 and 72 h. The introduced strain decreased exponentially in numbers within 72 h, to 49.6%, 52.6% and 50.6%, respectively, in the spinach and to 58.5%, 67.4% and 73.4% in the rocket. No differences were found in the number of the total viable count of aerobic bacteria and of Enterobacteriaceae as assessed on tryptic soy agar (TSA) and violet red bile dextrose agar (VRBD), respectively. Sequencing of the 16S rRNA genes of randomly selected isolates from VRBD were identified as Enterobacter cloaceae, Enterobacter ludwigii, Pantoea sp. and Raoultella planticola as the dominant Enterobacteriaceae species in the rocket and spinach phyllosphere. We found that cessation of irrigation for three days seems not to be an adequate sanitisation treatment to exclude the possibility of viable E. coli O157:H7 cells on spinach or rocket.

Research paper thumbnail of Cassia oil for controlling plant and human pathogens on fresh strawberries

Food Control, 2012

The inhibitory effects of cassia oil on the human pathogen Escherichia coli serotype O157:H7 and ... more The inhibitory effects of cassia oil on the human pathogen Escherichia coli serotype O157:H7 and the plant pathogen Botrytis cinerea were tested in vitro at different concentrations (200e800 ppm). Cassia oil exhibited antibacterial and antifungal activity against both pathogens. Cassia oil at 400e800 ppm inhibited the growth of E. coli O157:H7 in vitro and on the surface of treated strawberries. Cassia oil also completely inhibited the growth of B. cinerea at 400e800 ppm. Spore germination and germ tube elongation of the pathogens in potato dextrose broth were strongly inhibited in the presence of 100 ppm cassia oil. Cassia oil at all concentrations reduced the percentage of decayed strawberries. Experiments on reducing the development of natural decay in strawberries gave similar results. None of the quality parameters tested (colour, total soluble solids, pH, total acidity and ascorbic acid) was affected by cassia oil treatment. Storage experiments on strawberry showed that the percentage weight loss was reduced by cassia oil treatment. Hence, cassia oil could be an alternative to synthetic chemicals for controlling human and plant pathogens on fruits such as strawberries during postharvest and storage.

Research paper thumbnail of Effect of active and passive modified atmosphere packaging on quality attributes of fresh cut red cabbage

Research paper thumbnail of Effect of Hot Water Dips and Modified Atmosphere Packaging on Extend the Shelf Life of Bell Pepper Fruits

Research paper thumbnail of Influence of compost, amino and humic acids on the growth, yield and chemical parameters of strawberries

Journal of medicinal plant research

Research paper thumbnail of Field evaluation of some biological formulations against Thrips tabaci (Thysanoptera: Thripidae) in onion

World Applied Sciences Journal

Research paper thumbnail of Improving Strawberry fruit storability by edible coating as a carrier of thymol or calcium chloride

The aim of this study was to improve strawberry fruit storability by testing the effect of edible... more The aim of this study was to improve strawberry fruit storability by testing the effect of edible coating with soy or wheat gluten protein as a carrier of thymol, which mainly presents in the essential oil of thyme plants and calcium chloride on quality of strawberry fruits. Thymol and calcium chloride were applied during preparing the edible coating film. Coating fruits with thymol carried by soy protein or white gluten and CaCl 2 carried by soy protein showed the lowest weight loss percentage. Treating fruits with thymol carried by soy protein or white gluten did not exhibit any change in fruit appearance until 9 days of storage. All treatments maintained ascorbic acid content, firmness, TSS, total sugar and reduced the total colony, molds and yeasts compared to control. Fruits coated with thymol carried by soy protein or white gluten was the most effective treatments. In addition, coating fruits with thymol carried by soy protein or white gluten recorded the lowest values of anthocyanin, higher chroma and higher hue angle compared to control fruits.

Research paper thumbnail of Impact of Bio- and Organic Fertilizers on Potato Yield, Quality and Tuber Weight Loss After Harvest

Potato Research, 2014

ABSTRACT

Research paper thumbnail of Prevalence of Escherichia coli O157:H7 on spinach and rocket as affected by inoculum and time to harvest

Scientia Horticulturae, 2014

Irrigation water is an important vehicle for dissemination of human pathogens to plants. As conta... more Irrigation water is an important vehicle for dissemination of human pathogens to plants. As contamination in an early stage of the production chain cannot necessarily be counteracted later, cultural measures to reduce the contamination risk need to be adopted during primary production. In a two-factorial greenhouse experiment, we studied the impact of inoculum density and the interval between irrigation and harvest on the prevalence of an inoculated gfp-tagged non-pathogenic strain of Escherichia coli O157:H7. The strain was inoculated with the irrigation water at a density of log 5.6, log 6.6 and log 7.6 CFU ml −1 into the phyllosphere of fully grown crops of rocket and spinach (BBCH 49). The crops were then harvested after 3, 24, 48 and 72 h. The introduced strain decreased exponentially in numbers within 72 h, to 49.6%, 52.6% and 50.6%, respectively, in the spinach and to 58.5%, 67.4% and 73.4% in the rocket. No differences were found in the number of the total viable count of aerobic bacteria and of Enterobacteriaceae as assessed on tryptic soy agar (TSA) and violet red bile dextrose agar (VRBD), respectively. Sequencing of the 16S rRNA genes of randomly selected isolates from VRBD were identified as Enterobacter cloaceae, Enterobacter ludwigii, Pantoea sp. and Raoultella planticola as the dominant Enterobacteriaceae species in the rocket and spinach phyllosphere. We found that cessation of irrigation for three days seems not to be an adequate sanitisation treatment to exclude the possibility of viable E. coli O157:H7 cells on spinach or rocket.

Research paper thumbnail of Cassia oil for controlling plant and human pathogens on fresh strawberries

Food Control, 2012

The inhibitory effects of cassia oil on the human pathogen Escherichia coli serotype O157:H7 and ... more The inhibitory effects of cassia oil on the human pathogen Escherichia coli serotype O157:H7 and the plant pathogen Botrytis cinerea were tested in vitro at different concentrations (200e800 ppm). Cassia oil exhibited antibacterial and antifungal activity against both pathogens. Cassia oil at 400e800 ppm inhibited the growth of E. coli O157:H7 in vitro and on the surface of treated strawberries. Cassia oil also completely inhibited the growth of B. cinerea at 400e800 ppm. Spore germination and germ tube elongation of the pathogens in potato dextrose broth were strongly inhibited in the presence of 100 ppm cassia oil. Cassia oil at all concentrations reduced the percentage of decayed strawberries. Experiments on reducing the development of natural decay in strawberries gave similar results. None of the quality parameters tested (colour, total soluble solids, pH, total acidity and ascorbic acid) was affected by cassia oil treatment. Storage experiments on strawberry showed that the percentage weight loss was reduced by cassia oil treatment. Hence, cassia oil could be an alternative to synthetic chemicals for controlling human and plant pathogens on fruits such as strawberries during postharvest and storage.