About
63
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Introduction
Microalgae - Biofuel - Microbial fermentation - Environmental Microbiology
Current institution
Additional affiliations
National Research Centre, Egypt
Position
- Professor
December 2001 - November 2020
December 2001 - July 2020
Publications
Publications (63)
The recent restrictions imposed by the European Union on the use of antibiotics as growth promoters in animal feed have led to a significant increase in the demand for alternative protein sources. Algae, recognized for their abundance and nutritional value, have emerged as a promising substitute for soybeans in animal nutrition. Although the curren...
Selenium nanoparticles (SeNPs) are used in several sectors as antitumor, antimicrobial, and environmental adsorbents. Thus, the present research objective was the production of bacterial-SeNPs as an active and environmentally-friendly antibacterial and adsorbent agents and application into novel nanocomposite filter. From a total of 25 samples (soi...
In a greenhouse belong to Pomology Department, National Research Centre, Cairo, Egypt conducted the present work during 2022/2023aims of this study was to investigate the effect of nanotechnology on improving the efficiency of jojoba oil biological control of nematodes and root environmental protection. The investigated concentrations of treatments...
The fibrous wastes generated from the mills of textile production can be recycled and converted into high add-values products to be implemented in several applications. The current study aimed to employ commercial free cellulase enzyme to partially hydrolyze (activate) the polyester cotton blended (PET/C) fibrous wastes by creation functional group...
Developing special textiles (for patients in hospitals for example) properties, special antimicrobial and anticancer, was the main objective of the current work. The developed textiles were produced after dyeing by the novel formula of natural (non-environmental toxic) pigments (melanin amended by microbial-AgNPs). Streptomyces torulosus isolate OS...
This edited volume, Pseudomonas aeruginosa - New Perspectives and Applications, is a collection of reviewed and relevant research chapters, offering a comprehensive overview of recent developments in immunology and microbiology. Chapters address such topics as P. aeruginosa and hospital-acquired infections, the multidrug resistance of P. aeruginosa...
The study examined the impact of adding oregano extract and/or rosemary to broiler diets to counteract the growth inhibition caused by heat stress (HS). It also investigated the effects on the activity of digestive enzymes, microbiological composition, and the expression of antioxidant and tight junction-related proteins. Three hundred- and fifty-d...
The accumulation of textile wastes, without use, leads to many environmental and economic problems, so they must be recycled and given "smart" properties to be useful in many applied fields. Immobilization of nanoparticles, particularly biosynthesized one, on textile surfaces may provide additional bioactive capabilities, such as antimicrobial and...
.Various synthetic nematicides are currently used effectively in the control of plant parasitic nematodes. However, these nematicides have adverse effects on humans and the environment. Neem oil is eco-friendly alternatives to synthetic nematicides. The effectiveness of repeated neem oil application in suppressing the root-knot nematodes infestatio...
A plastic-type flat panel photobioreactor (PTFPP) prototype was designed for microalgae cultivation as biodiesel feedstock. The growth, biomass, and lipid production of the oleaginous microalga Scenedesmus obliquus were optimized through the enhanced design and cultivation conditions in the PTFPP. The optimization conditions include cultivation of...
Polyester/cotton (PET/C) blended fabric wastes are produced daily in huge amounts, which constitutes an economic loss and an environmental threat if it is not reused appropriately. Modern textile waste recycling technologies put much effort into developing fabric materials with unique properties, such as bioactivity or new optical goods based on mo...
Microbial nanotechnology is currently helping to address human needs in many areas of life. One of these fields is the production of cellulose nanomaterials, which are used in many medical, agricultural, environmental and industrial applications. In this study, the novel strain Aspergillus nidulans optical density 1 (OD1) was isolated as cellulolyt...
The isolation of lipid-rich cellulolytic fungi was targeted to be investigated as bioflocculant agents for microalgae harvesting. The fungal isolate coded MD1 was selected based on its lipid content, cellulolytic activity, and its harvesting efficiency for the freshwater oleaginous microalga Chlorella sp. The selected fungus which was molecularly i...
Copper is an essential element for the metabolism of plants and animals, and has wide applications
in the agricultural and industrial sectors. On the other hand, copper nanoparticles (Cu-NPs)
have become widely used for research and application, which increases the chances of its spread
and potential environmental exposure to this element. Therefor...
The wide spread of nanotechnology applications currently carries with it the possibility of polluting the environment with the residues of these nanomaterials, especially those in the metallic form. Therefore, it is necessary to study the possibility of treating and removing various nanoscale metal pollutants in environmentally friendly ways. The p...
Semiconductors are the basic building block and basic elements of modern electrical devices and machines. N-type metal oxide semiconductor (MOS) is particularly interesting due to their unique properties and wide applications. Because of their enormous applications and importance, semiconductors are believed to play a major role in facilitating mod...
The effect of fermentation by Saccharomyces cerevisiae on biological properties of cinnamon ( Cinnamomum cassia ) was investigated. The study demonstrated that the extract of S. cerevisiae -fermented cinnamon (S.C.FC) has antioxidants higher than non-fermented one. The optimum results for antioxidant yield were noted with 10 ⁷ CFU S. cerevisiae /10...
The current study aimed to study the effect of foliar application of nano-NPK fertilizer to one-year-old Fig trees (cv. Black Mission) in terms of tree growth performance as well as on soil microbial activity. The investigated concentrations of nano-NPK were 100, 200, 300, 400 and 500 ppm in addition to the control treatment applied for two seasons...
World face several challenges the most decisive climatic changes , freshwater poverty and poor usage efficiency for natural resources (soil & water) particularly in developing countries. Applying Nanotechnology may represent a smart mechanism toward sustainable agricultural. Much efforts have been exerted to utilizing nano-technology and producing...
Currently, bionanotechnologies are attracting great interest due to their promising results and potential benefits on many aspects of life. In this study, the objectives was to biosynthesis CuO-NPs using cell-free extract(s) of copper-resistant fungi and use them in bioremediation of textile industry wastewater. Out of 18 copper-resistant fungal is...
Searching for molluscicidal agents of biological origin is mandatory to avoid the drawbacks of using chemical molluscicides. Algae are good candidates as sources of compounds with molluscicidal properties, especially if they are combined with modern techniques such as nanotechnology. This study aimed to evaluate the molluscicidal activity of two al...
Environmental application of nanomaterials to treat air, soil and wastewater pollutants has several advantages due to the unique properties of the nanoparticles. In the literature, there are many positive reports of effective treatment processes for different environmental pollutants based on nanotechnology. However, successful laboratory-scale exp...
New trends in knowledge acquisition and advances in several disciplines have led to the fusion of hitherto separate lines of specialties. In life sciences, the coming together of diverse disciplines including engineering, law, computer science, ethics and social values in unison with life sciences gave birth to biotechnology in the 20th century. Mo...
Microbial biotechnology mainly aims to use microorganisms and their biological processes to improve life, through obtaining a direct product for human use or an indirect useful service such as bioremediation and environmental cleanup. The field of microbial nanotechnology as a branch of microbial biotechnology has become more active and attractive...
The color of food is a critical factor influencing its general acceptance. Owing to the effects of chemical colorants on health, current research is directly aimed at producing natural and healthy food colorants from microbial sources. A pigment-producing fungal isolate, obtained from soil samples and selected based on its rapidity and efficiency i...
Soil, in particular, is subjected to a wide range of xenobiotics such as chemical fertilizers, pesticides, solid wastes, heavy metals, solvents, and hydrocarbons. The biological treatment methods differ according to the nature of the target pollutant and according to the nature of the contaminating environment. Nanomaterials have unique properties...
Many organic or inorganic substances like heavy metals, dyes, pesticides, and agricultural wastes containing hazardous materials are discharged to soil by sources like agriculture processes, industrial wastewater, and municipal wastewater. There is a real need to monitor xenobiotics especially herbicides and soil-applied pesticides in soil before t...
There are two ways for preparing nanotextiles, one of them is by preparing nanofibers and the other is by adding nanomaterials to textiles fabrications or other ingredients. Nanowastes exist in wastewater and surrounding environments through residues nanomaterials and/or residues of fibers. These nanowastes make a lot of negative environmental impa...
Improving the content and production of high-value ketocarotenoid pigments is critical for the commercialization of microalgal biorefineries. This study reported the use of magnesium aminoclay (MgAC) nanoparticles for enhancement of astaxanthin production by Haematococcus pluvialis in photoautotrophic cultures. Addition of 1.0 g/L MgAC significantl...
Enzymes as specific natural biocatalysts are present in all living organisms and they play
a key role in the biochemical reactions inside, as outside the cell. Despite the wide range
of environmental, medical, agricultural, and food applications, the high cost, nonreusability, and limited stability of soluble (non-immobilized) enzymes are considere...
Microalgae have been considered as one of the most promising biomass feedstocks for various industrial applications such as biofuels, animal/aquaculture feeds, food supplements, nutraceuticals, and pharmaceuticals. Several biotechnological challenges associated with algae cultivation, including the small size and negative surface charge of algal ce...
Microalgae have been considered as one of the most promising biomass feedstocks for various industrial applications such as biofuels, animal/aquaculture feeds, food supplements, nutraceuticals, and pharmaceuticals. Several biotechnological challenges associated with algae cultivation, including the small size and negative surface charge of algal ce...
In this study, silver nanoparticles (AgNPs) were green-synthesized extracellularly by the action of bioactive compounds in cultural filtrates of green microalga Scenedesmus obliquus (KY621475). The influences of six different nitrogen sources (i.e., NaNO3, CO(NH4)2, (NH4)2CO3, KNO3, NH4NO3, and (NH4)2SO4) on extracellular biosynthesis of AgNPs were...
A huge amount of agricultural waste produced in agri-aquacultural farms could play a positive and important role in different aspects starting from decreasing rate of soil degradation till raising soil fertility besides maintaining activity and diversity of microorganism community in soil, thereby good and effective managing of recycling these agri...
Environmental applications of selective lignin-degrading fungi and enzymes are of great interest as alternate technologies for paper industry (biopulping), biofuels, organic fertilizers, animal feeds. For this reason, the current study aimed to isolate selective delignifying fungi to convert the abundant lignocellulosic agricultural wastes into val...
Enzymes as specific natural biocatalysts are present in all living organisms and they play a key role in the biochemical reactions inside, as outside the cell. Despite the wide range of environmental, medical, agricultural, and food applications, the high cost, non-reusability, and limited stability of soluble (non-immobilized) enzymes are consider...
The current study evaluates harvesting microalga Scenedesmus obliquus at different growth phases using chitosan, an anionic bioflocculating polymer. Different concentrations of chitosan were applied at different cultural pH levels and at different growth stages. The flocculation efficiency was evaluated in S. obliquus cultures with various cell den...
The current study evaluates harvesting microalga Scenedesmus obliquus at different growth phases using chitosan, an anionic bioflocculating polymer. Different concentrations of chitosan were applied at different cultural pH levels and at different growth stages. The flocculation efficiency was evaluated in S. obliquus cultures with various cell den...
This study aimed at isolation, screening and characterization of indigenous L-asparaginase producing bacteria from Egyptian agricultural soils. Several soil bacterial isolates were screened, and plate assayed for their abilities to produce, biotechnological and environmental important enzyme, L-asparaginase. Nine isolates belong to seven genera wer...
Local single cell microalgae isolated from a wastewater swamp and identified as Scenedesmus obliquus were used to determine its applicability for utilization of domestic wastewater for biomass and lipid production. Secondary treated domestic wastewater with or without mixing of growth medium was used to cultivate S. obliquus for the biomass and lip...
Microalgal biomass production cost at pilot scale could be reduced via reduction of harvesting cost. Among different microalgal downstream methods which include centrifugation, filtration gravity sedimentation, flotation and screening, flocculation is considered as an effective low-cost harvesting technique. Dual flocculants system is an advanced f...
Harvesting of microalgae Scenedesmus sp. (strain A1) using the natural polymer chitosan was investigated. Different chitosan concentrations, i.e., 10, 20, 40, 60 and 80 ppm were used in the pH range 6 to 10 and cultural cell densities values equivalent to 1, 2 and 3 abs680. Without the addition of chitosan, the increase in pH of the culture led to...
Two low quality sewage effluents monthly collected during January 2012 to July
2012from Abu-Rawash and Zenine sewer plants were chemically analyzed and compared with
Nile river water to evaluate their irrigation suitability. Sewage effluent samples were
characterized for their pH, electrical conductivity (EC), sodium adsorption ratio (SAR) as well...
The relationship among irrigation water type, soil characterization and production of cultivated crops are widely closed. El-Salam canal in North of Sinai consisted of mixture of both drainage and Nile water (1:1 ratio) is main source of irrigation. Long application period of such water in Gelbana region, El-Tina plain beside poor drainage, all led...
The production of biodiesel from algae is one of the promising alternative fuel for diesel engines. Algae oil was extracted from microalgae Scenedesmus obliquus. The biodiesel was produced from algal oil by transesterification. Biodiesel blends of 10 and 20% were prepared. Fatty acid analysis showed that fuel properties of S. obliquus were highly a...
Lignocellulosic materials are hugely abundant agricultural biomass, which their bioconversion occurs by various microorganisms. Environmental conditions greatly affect the biological processes and the diversity of living organisms. The aim of this study was to isolate and characterize cellulolytic and hemicellulolytic fungi and clearlying thier div...
Surface low quality water samples were periodically collected at monthly intervals from El-Salam Canal at start (west Port Said) and middle (Balloza region) points. Samples were microbiologically analyzed for their microbial biomass and bacterial pathogens comparing with River Nile. Results showed that high densities of microbial biomass existed at...
Low quality water samples were regularly collected at monthly intervals from Belbeis and Bahr El-Bakar agricultural drains as well as from River Nile and analyzed for their microbial and pathogenic biomass. Results confirmed the being of high densities of microbial biomass as well as both classical and new indicator pathogenic bacteria, yet at high...
A case study was performed to monitor changes in microbial biomass and bacterial pathogens in the effluent of two important sewer plants that discharges their effluents in agricultural irrigation canals in Giza, Egypt. The studied effluents collected monthly for microbiologically analysis from El-Mohtamadia canal (Zenen sewer plant) and Abu-Rawash...
Control of water pollution and environmental protection are major issues to preserve living conditions for the future in Egypt. Polychlorinated biphenyl (PCBs) in sewaged soil were decontaminated in two experiments, a column experiment irrigated with regular water and a field experiment irrigated with treated sewage effluent. Decontamination of the...
Control of water pollution and environmental protection are major issues to preserve living conditions for the future in Egypt. Polychlorinated biphenyl (PCBs) in sewaged soil were decontaminated in two experiments, a column experiment irrigated with regular water and a field experiment irrigated with treated sewage effluent. Decontamination of the...
Nowadays the limited water resources in Egypt lead to use the sewage effluent in agriculture; however, there are concerns about the long-term accumulation and potential effects of aliphatic hydrocarbons contained in the sewage effluent used. In two columns and field experiments respectively irrigated with regular water or treated sewage effluent, t...
A microalgae isolate obtained from a wastewater swamp in Zifta, Gharbia Governorate, Egypt identified as Chlorella sp. M2 was examined for biomass and lipid production in Bold Basal Medium (BBM) containing different concentrations of some nitrogen sources (urea, ammonium carbonate, potassium nitrate, ammonium nitrate, and sodium nitrate). Chlorella...
A total of 96 bacterial cultures were isolated from soil. Seventeen bacterial isolates were selected following their cultivation on solid media containing 100 mg · L −1 carbofuran as the sole source of carbon and nitrogen. Of the 17 isolates, 10F, 11M, 17N, 23B and 26M were specifically chosen because of their relatively higher growth efficiency an...
Microalgal lipids are the oils of the future for sustainable biodiesel production. One of the most important decisions in obtaining oil from microalgae is the choice of species. A total of 45 algal cultures were isolated from a freshwater lake at Wonju, South Korea. Five microalgal isolates were selected based on their morphology and ease of cultiv...
A total of 96 bacterial cultures were isolated from soil. Seventeen bacterial isolates were selected following their cultivation on solid media containing 100 mg · L carbofuran as the sole source of carbon and nitrogen. Of the 17 isolates, 10F, 11M, 17N, 23B and 26M were specifically chosen because of their relatively higher growth efficiency and g...
