Hoda Mohamed El-Gharabawy
@du.edu.eg
Faculty of Science
Damietta University
RESEARCH INTERESTS
Microbiology, Mycology, Macrofungi
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Hoda M El-Gharabawy
CRC Press
Hoda M. El-Gharabawy and Mamdouh S. Serag
CRC Press
Amira A. El-Fallal, Taha M. El-Katony, Mahmoud M. Nour El-Dein, Nourhan G. Ibrahim, and Hoda M. El-Gharabawy
Egypts Presidential Specialized Council for Education and Scientific Research
S OLID state fermentation system (SSFS) efficiency depends on the proper selection of the microorganisms, substrates and environmental conditions. In this study, we investigated and optimized the antioxidant activity of the SSFS constructed using Pleurotus floridanus or Paecilomyces variotii on rice straw. The genotypic effect on antioxidant activity surpassed that of the environmental conditions. Peroxidase (POX) activity was expressed only in Pleurotus floridanus , but catalase (CAT) activity was expressed in both fungi, in favor of Paecilomyces variotii. The activities of both enzymes were maximized at low pH, low temperature and with ammonium chloride as the N source, but high moisture was optimal for POX and low moisture was optimal for CAT. Phenolic and flavonoid contents were higher in Paecilomyces variotii than Pleurotus floridanus , with preference for high moisture, low pH and urea in Paecilomyces variotii , and low moisture, low pH, and sodium nitrate in Pleurotus floridanus . The reducing power of Paecilomyces variotii was higher than that of Pleurotus floridanus , with positive moisture-dependence, low temperature, and gelatin preferences in Paecilomyces variotii , and negative moisture- and temperature-dependence and urea-preferences in Pleurotus floridanus . The 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging activity was higher in Paecilomyces variotii than Pleurotus floridanus , with negative dependence on moisture and temperature and limited nitrogen source effects in both fungi . Regarding the incubation period, maximal antioxidant activity was observed with a shorter incubation in the Paecilomyces variotii SSFS and a longer incubation in the Pleurotus floridanus SSFS.
Hoda M. El-Gharabawy, Caio A. Leal-Dutra, and Gareth W. Griffith
Elsevier BV
Shadia A. Elsayed, Hoda M. El‐Gharabawy, Ian S. Butler, and Faten M. Atlam
Wiley
Amira El-Fallal, Ahmed El-Sayed, and Hoda El-Gharabawy
Egypts Presidential Specialized Council for Education and Scientific Research
AGARICACEAE is a widely distributed monophyletic family of saprotrophic fungi,includes a large number of genera and species of nutritional and medicinal mushrooms. However, few literatures have been published on wild members of Agaricaceae in Egypt. Two basidiomycetes from family Agaricacea were recorded for the first time in Egypt during macrofungal surveys. The first; Podaxis pistillaris fallal (Lin.Ex.Pers) Fr.;a desert puffball was growing solitary on sandy soils in Zaranik protected area at North Sinai during spring season. The second; Leucocoprinus birnbaumii EGDA (Corda) Singer; a gilled mushroom was growing in small group on a dead stump of lemon tree in El-Sinania orchards at Damietta during autumn season. The collected agaricoid were identified based on macro and microscopic laboratory features. Phylogenetic analysis of ITS sequences was used to confirm the fungal identification and verify their taxonomic position with other related genera. A detailed description of both species and the ecological features of their habitat are provided.
Hoda Mohamed El-Gharabawy, Amira Ali El-Fallal, and Ahmed Kassem A. El-Sayed
Schweizerbart
Yangang Xing, Matthew Brewer, Hoda El-Gharabawy, Gareth Griffith, and Phil Jones
IOP Publishing
In order to improve energy performance of buildings, insulation materials (such as mineral glass and rock wools, or fossil fuel-based plastic foams) are being used in increasing quantities, which may lead to potential problem with materials depletions and landfill disposal. One sustainable solution suggested is the use of bio-based, biodegradable materials. A number of attempts have been made to develop biomaterials, such as sheep wood, hemcrete or recycled papers. In this paper, a novel type of bio insulation materials – mycelium is examined. The aim is to produce mycelium materials that could be used as insulations. The bio-based material was required to have properties that matched existing alternatives, such as expanded polystyrene, in terms of physical and mechanical characteristics but with an enhanced level of biodegradability. The testing data showed mycelium bricks exhibited good thermal performance. Future work is planned to improve growing process and thermal performance of the mycelium bricks.
HM El-Gharabawy
Mushroom Research Foundation
Wood decay fungi found on living or dead trees in fruit orchards in the Nile Delta region of Egypt were isolated into pure culture and their ligninolytic capabilities examined. Growth on ash sawdust was monitored by quantification of ergosterol and laccase/peroxidase activities using the model substrate ABTS. Two species from the polyporoid clade of order Polyporales exhibited faster growth and greater enzymatic activity than two isolates from the phlebioid clade but these differences were not reflected in dry weight loss of wood. Cellophane strips impregnated Remazol Brilliant Blue dye and MnCl 2 impregnated plates were used to show the distinctive spatiotemporal patterns for the four species.