Person:
EL-Newishy, Ahmed El-Hussein

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0000-0002-6349-3282
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57015428200
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Name
Ahmed El-Hussein EL-Newishy
Last Name
EL-Newishy
First Name
Ahmed El-Hussein
Main Affiliation
Galala University
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Professor

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Now showing 1 - 5 of 5
  • Publication
    Metadata only
    Life cycle assessment of using laser treatment and nanomaterials to produce biogas through anaerobic digestion of slurry
    (Springer, 2021-02-09) Samer, M.; Hijazi, O.; Abdelsalam, E. M.; Attia, Y. A.; Yacoub, I. H.; Bernhardt, H.; EL-Newishy, Ahmed El-Hussein
    Recently, laser radiation and nanomaterials have been utilized to improve biogas yield via anaerobic digestion of herd’s manure through biostimulating methanogenic bacteria. Yet, laser irradiation and nanomaterials as anaerobic bacteria stimulant could have environmental impacts that have not been assessed or known. The aim of the current research was to understand and evaluate variable laser doses in the presence of nickel nanoparticles (Ni NPs) and their environmental impacts during the production of biogas from treated manure. A life cycle assessment scheme was employed to achieve this aim. The used laser doses were 0.5 h, 1 h and 2 h and correlated to 1-h incandescent light exposure, where all treatments received 2 g/m3 Ni NPs. The outcomes were conferred in the pattern of specific influences for the biogas utilization and production as an energy source. The studied impacts were global warming, greenhouse gas emissions mitigation, acidification, eutrophication, ozone layer depletion, freshwater ecotoxicity and prospective human toxicity. Results revealed that laser irradiation with the addition of Ni NPs during the biostimulation of anaerobic digestion has the least environmental adverse effects when compared to the control group.
  • Publication
    Metadata only
    Exploring ATR Fourier transform IR spectroscopy with chemometric analysis and laser scanning microscopy in the investigation of forensic documents fraud
    (Elsevier, 2021-03) Farid, S.; Kasem, M.A.; Zedan, A.F.; Mohamed, G.G.; EL-Newishy, Ahmed El-Hussein
    Forensic examiners are overwhelmed every day by many cases of official and other business documental forgery. Many cases of which involve the addition or deletion of one or more similar writing/copying paper(s) to the original document. Another challenge that faces the examiners is the determination of the intersected signature lines chronological sequence. This suggests a forgery case in that instance if such modifications are made without the consent of all parties. The importance of the documents under question mandates the usage of non-destructive discriminative analytical methods. The main tool used by the forensic examiners in the Egyptian medicine forensic authority is the Video spectral comparator (VSC). However, in many times the latter doesn’t give conclusive suggestions to the examiner who becomes hesitant to give a fair judgement on the case. The current study investigated the use of a molecular spectroscopic technique like Fourier transform infrared spectroscopy (FTIR) in the discrimination between writing/copying papers and the sequence of the used writing inks by Atomic force microscopy (AFM) as non-destructive techniques. The apparently similar used papers were from the commonly used documents under question in the Egyptian market. We investigated 12 different main types of office/copying paper and the toner inks of two different laser printers versus three brands of blue ballpoint pens in the Egyptian market. FTIR spectroscopy and AFM were found to be potential tools that can be combined with VSC in the discrimination between different papers and determining the chronological sequence of writing inks. Principal component analysis (PCA) as a multivariate analysis tool achieved a satisfactory discrimination capacity between the 12 papers in the FTIR region 830–1185 cm−1.
  • Publication
    Metadata only
    Photodynamic therapy-based tuberculosis treatment
    (Elsevier, 2021) Houreld, Nicolette N.; EL-Newishy, Ahmed El-Hussein
    Tuberculosis (TB) is an infectious communicable bacterial disease that has been a global health burden for many years, with an estimated one in four people infected with the disease. TB is an airborne disease caused by the bacillus Mycobacterium tuberculosis. It typically infects the lungs (pulmonary TB) but can also affect other sites, such as the brain and spine (extrapulmonary TB). The occurrence of drug-resistant TB (DR-TB) has greatly affected treatment outcomes. A novel alternative treatment for TB has emerged over the last few years called photodynamic therapy (PDT). Typically, PDT is used for the treatment of various cancers, but its use in the treatment of drug-resistant pathogenic microorganisms (antimicrobial PDT or antimicrobial photoinactivation) is gaining popularity. PDT is minimally invasive and involves the combination of a photosensitizer (PS), molecular oxygen, and laser light at a specific wavelength. The result is the production of reactive oxygen species (ROS) that selectively damage target cells in an athermic manner.
  • Publication
    Open Access
    Enhancement of Labneh Quality by Laser-Induced Modulation of Lactocaseibacillus casei NRRL B-1922
    (MDPI, 2022-03-18) Elshaghabee, Fouad M. F.; Mohamed, Mahmoud S. M.; EL-Newishy, Ahmed El-Hussein
    Labneh is positioned in the top ranking of the bestselling dairy products all over the world due to its health benefits and delicious taste. Labneh production depends mainly on probiotic bacteria in the fermentation of milk. Probiotic bacteria have many health benefits, which are driven by their selective bioactive metabolites that quantitively affect the fermentation products. The current investigation aimed to study the implementation of photobiomodulation through the irradiation of Lacticaseibacillus casei NRRL-B-1922 by a He–Ne laser (630 nm) with different laser doses (3, 6 & 12 J/cm2) prior to milk fermentation. This procedure sought to improve the probiotic bacteria’s activities while enhancing the labneh’s characteristics and consequently produce a more favorable labneh product with better marketing qualities. The photobiostimulated bacterial starter was found to induce increased titratable acidity with the moisture reduction of the labneh product under cold storage conditions for 20 days. The effect was most prominent when using a 12 J/cm2 laser dose. The flavor-aiding components, mainly diacetyl and acetaldehyde compounds, and sensory scores were increased in the labneh produced by irradiated L. casei when compared to the non-radiated probiotic culture after storing the products under cold conditions for 20 consecutive days. Moreover, the antioxidant and proteolytic activities of labneh produced by treated L. casei (12 J/cm2 laser dose) after cold storage were significantly elevated by 41 and 14%, respectively. In conclusion, we can report significantly improved selected characteristics in the final products after the employment of photobiomodulation process, the potential application of this concept on the industrial scale, and its implications on lengthening the product shelf life with improved qualities.
  • Publication
    Open Access
    Identification and differentiation between olive oil from different Al Jouf olive field areas by optical spectroscopic techniques
    (AIP Publishing, 2022-10-26) Khedr, Amal Abdelfattah; Imam, Hisham; Alhajoj, Abdullah M.; EL-Newishy, Ahmed El-Hussein
    Identification and determination of the authenticity of the produced olive oil by potential spectroscopic techniques have become of nutritional importance to human diet. The study of olive oil is significantly important in trade and business due to the commercial fraud that occurs in the associated business. Al Jouf city, which lies in the northern part of the Kingdom of Saudi Arabia, is famous for its production of the finest quality of olive oil in the kingdom. There is a need to develop feasible in situ identification techniques for the recognition of and discrimination between different olive oil products. One main laser spectroscopic technique known for its superiority over other conventional techniques as an elemental analytical tool is laser induced breakdown spectroscopy (LIBS). Inductive couple plasma mass spectrometry is also a well-known conventional technique with very high sensitivity to most of the elements to the range of parts per billion. However, it requires extensive sample preparation and consumes a lot of time. It has been used as a reference technique to validate the results of the LIBS technique. Moreover, phenolic compounds, which are essential in various types of functional food and folk medicine, were investigated using conventional vibrational analytical tools such as Fourier transform infrared spectroscopy.