Publications by authors named "Gamil E Ibrahim"

Article Synopsis
  • Cellulose, a key component of lignocellulosic biomass, can be broken down into glucose by cellulases, which are important for apple juice production as they help clarify the juice and reduce sedimentation.
  • A new bacterial isolate, Bacillus licheniformis strain-MA1, was identified as a cellulase producer, and conditions were optimized to significantly boost enzyme production using agricultural waste such as corn cob.
  • The optimized cellulase treatment led to a notable increase in apple juice yield (88.2%) compared to untreated juice (75.4%), along with a higher extraction of volatile compounds, enhancing the juice's quality.
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The current study aimed to evaluate the hydrolysis of whole fat milk (WFM) and sweet whey (SW) using β-galactosidase (β-gal) after covalent immobilization onto activated alginate/tea waste (Alg/TW) beads as a novel carrier. The optimum temperature for free and Alg/TW/β-gal was 40 °C and the ideal pH was 7.0.

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Background: Because humans lack α-galactosidase, foods containing certain oligosaccharides from the raffinose family, such as soybeans and other legumes, may disrupt digestion and cause flatulence.

Results: Aspergillus niger NRC114 α-galactosidase was purified using protein precipitation, gel filtration, and ion exchange chromatography steps, which resulted in a 123-fold purification. The purified enzyme was found to be 64 kDa using the SDS-PAGE approach.

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Background: α-Galactosidase is widely distributed in plants, microorganisms, and animals, and it is produced by different fungal sources. Many studies have confirmed the valuable applications of α-galactosidase enzymes for various biotechnological purposes, like the processing of soymilk.

Results: Aspergillus niger NRC114 was exploited to produce the extracellular α-galactosidase.

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Fatigue and rapid exhaustion are common complaints among construction workers, as a result of high-effort levels, physical overexertion, weather and long physically demanding work hours. This study aimed to fortify cloudy apple juice with riboflavin (vitamin B2) to evaluate changes in chemical composition, antioxidant activity and volatile compounds in the fortified juice and to study its effect on the volunteer construction workers complaining of fatigue resulting from demanding physical duties. Analysis of volatile compounds in the fortified cloudy apple juice using Gas Chromatography and Gas Chromatography-Mass Spectrometry identified thirty-four volatile compounds including esters, alcohols, aldehydes and acids.

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Background Ectopic visceral fat is a major risk factor for obesity complications including insulin resistance and metabolic syndrome. Ultrasonography is a simple bedside screening tool used for the assessment of ectopic visceral fat including fatty pancreas. This study investigates the association between insulin resistance, metabolic syndrome and fatty pancreas detected by ultrasound in children with obesity.

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