dalia samak

Mrs. dalia samak


Research Focus & Metrics

Academic Career Length

9Years (2018-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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9 March 2020 in Animals
Verified
Journal Article
Open access
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Mohamed E.  Abd El-HackMohamed E. Abd El-Hack
Mohamed E. Abd El-Hack
Mahmoud AlagawanyMahmoud Alagawany
Mahmoud Alagawany
Hazem ShaheenHazem Shaheen
Hazem Shaheen
DSdalia samak
dalia samak
SOSarah I. Othman
Sarah I. Othman
MSMahmoud Sitohy
Mahmoud Sitohy
Poultry enterprises have sustained rapid development through the last three decennaries. For which reason, higher utilization of antibacterial, either as therapeutic or growth promoting agents, has been accepted. Owing to the concern of developing bacterial resistance among populations towards antibiotic generations, accumulation of antibacterial remaining’s in chicken products and elevating shopper request for outcomes without antibacterial remaining’s, looking for unconventional solutions that could exchange antibacterial without influencing productiveness or product characters. Using natural alternatives including ginger, garlic prebiotics, organic acids, plant extracts, etheric oils and immune stimulants have been applied to advance the performance, hold poultry productiveness, prevent and control the enteric pathogens and minimize the antibacterial utilization in the poultry production in recent years. The use of a single replacement or ideal assemblage of different choices besides good supervision and livestock welfare may play a basic role in maximizing benefits and preserving poultry productiveness. The object of this review was to support an outline of the recent knowledge on the use of the natural replacements (ginger and its derivatives) in poultry feed as feed additives and their effects on poultry performance, egg and meat quality, health as well as the economic efficiency.

22 April 2020 in Molecules
Verified
Journal Article
Open access
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MFMayada R. Farag
Mayada R. Farag
Mahmoud AlagawanyMahmoud Alagawany
Mahmoud Alagawany
MJMay N. Bin Jumah
May N. Bin Jumah
SOSarah I. Othman
Sarah I. Othman
AKAsmaa Khafaga
Asmaa Khafaga
Mohamed E.  Abd El-HackMohamed E. Abd El-Hack
Mohamed E. Abd El-Hack
The incidence of adverse reactions in food is very low, however, some food products contain toxins formed naturally due to their handling, processing and storage conditions. 5-(Hydroxymethyl)-2-furfural (HMF) can be formed by hydrogenation of sugar substances in some of manufactured foodstuffs and honey under elevated temperatures and reduced pH conditions following Maillard reactions. In previous studies, it was found that HMF was responsible for harmful (mutagenic, genotoxic, cytotoxic and enzyme inhibitory) effects on human health. HMF occurs in a wide variety of food products like dried fruit, juice, caramel products, coffee, bakery, malt and vinegar. The formation of HMF is not only an indicator of food storage conditions and quality, but HMF could also be used as an indicator of the potential occurrence of contamination during heat-processing of some food products such as coffee, milk, honey and processed fruits. This review focuses on HMF formation and summarizes the adverse effects of HMF on human health.

31 July 2020 in Molecules
Verified
Journal Article
Open access
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HSHamida Saleh
Hamida Saleh
Atef MK NassarAtef MK Nassar
Atef MK Nassar
Ahmed E. NoreldinAhmed E. Noreldin
Ahmed E. Noreldin
DSdalia samak
dalia samak
NENorhan Elshony
Norhan Elshony
Yasser El-SayedYasser El-Sayed
Yasser El-Sayed
Fipronil (FIP) is an insecticide commonly used in many fields, such as agriculture, veterinary medicine, and public health, and recently it has been proposed as a potential endocrine disrupter. The purpose of this study was to inspect the reproductive impacts of FIP and the possible protective effects of cerium nanoparticles (CeNPs) on male albino rats. Rats received FIP (5 mg/kg bwt; 1/20 LD50), CeNPs (35 mg/kg bwt) and FIP+CeNPs per os daily for 28 days. Serum testosterone levels, testicular oxidative damage, histopathological and immunohistochemical changes were evaluated. FIP provoked testicular oxidative damage as indicated by decreased serum testosterone (≈60%) and superoxide dismutase (≈50%), glutathione peroxidase activity (≈46.67%) and increased malondialdehyde (≈116.67%) and nitric oxide (≈87.5%) levels in testicular tissues. Furthermore, FIP induced edematous changes and degeneration within the seminiferous tubules, hyperplasia, vacuolations, and apoptosis in the epididymides. In addition, FIP exposure upregulated interleukin-1β (IL-1β), nitric oxide synthase 2 (NOS), caspase-3 (Casp3) and downregulated the Burkitt-cell lymphomas (BCL-2), inhibin B proteins (IBP), and androgen receptor (Ar) mRNA expressions Casp3, nitric oxide synthase (iNOS), ionized calcium-binding adapter molecule 1(IBA1), and IL-1β immunoreactions were increased. Also, reduction of proliferating cell nuclear antigen (PCNA), mouse vasa homologue (MVH), and SOX9 protein reactions were reported. Interestingly, CeNPs diminished the harmful impacts of FIP on testicular tissue by decreasing lipid peroxidation, apoptosis and inflammation and increasing the antioxidant activities. The findings reported herein showed that the CeNPs might serve as a supposedly new and efficient protective agent toward reproductive toxicity caused by the FIP insecticide in white male rats.

26 April 2018 in Environmental Science and Pollution Research
Verified
Journal Article
Closed access
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Mohamed E.  Abd El-HackMohamed E. Abd El-Hack
Mohamed E. Abd El-Hack
DSdalia samak
dalia samak
Ahmed E. NoreldinAhmed E. Noreldin
Ahmed E. Noreldin
Muhammad ArifMuhammad Arif
Muhammad Arif
HYHilal S. Yaqoob
Hilal S. Yaqoob
Ayman Abdel Aziz SwelumAyman Abdel Aziz Swelum
Ayman Abdel Aziz Swelum

24 January 2022 in Environmental Science and Pollution Research
Verified
Journal Article
Closed access
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HGHossam Gafar
Hossam Gafar
MLMohamed Lebda
Mohamed Lebda
KSKadry M. Sadek
Kadry M. Sadek
MEMohamed S. Elfeky
Mohamed S. Elfeky
Yasser El-SayedYasser El-Sayed
Yasser El-Sayed
TAtarek abouzed
tarek abouzed

29 March 2021 in Veterinary World
Verified
Journal Article
Open access
SESahar M. El-Sheshtawy
Sahar M. El-Sheshtawy
AEAmal F. El-Zoghby
Amal F. El-Zoghby
NSNesreen A. Shawky
Nesreen A. Shawky
DSdalia samak
dalia samak
Background and Aim: Aflatoxins (AFs) are potent toxic metabolites produced from Aspergillus species. Whose existence in poultry ration leads to drastic economic losses, notably in duck, as the most susceptible poultry species. This study aimed to determine tissue residues of AFs, alterations in selected clinical chemistry variables in serum, mainly during the exposure period, and lycopene and silymarin's possible roles as herbal treatments against aflatoxicosis in Pekin duckling. Materials and Methods: The study used one hundred and twenty one-day-old Pekin ducklings and classified them into four groups comprising 30 ducklings in each group. The control group (G1) ducklings were fed a mycotoxin-free ration, and G2 received a naturally contaminated ration with 30 ppb of AFs. G3 and G4 consumed contaminated rations with AFs with 30 ppb for 2 weeks and were treated with lycopene 100 mg/kg or silymarin 600 mg/kg/food, respectively, for 10 days. Serum activities of alanine transaminase and alkaline phosphatase (ALP), glutamyl transferase, ALP, total protein and albumin creatinine and uric acid concentrations, oxidant/antioxidant parameters (malondialdehyde [MDA], total antioxidant capacity (TAC), glutathione S-transferase (GST), and catalase [CAT]), and hepatic AFs residue were determined. Lycopene and silymarin were used for the treatment of aflatoxicosis for another 10 days. Results: Hepatic and kidney parameters were elevated in the AFs intoxicated group and reduced in the lycopene- and silymarin-treated groups. They had elevated MDA and AFs residues with decreased antioxidant parameters (TAC, GST, and CAT) in the AFs group. At the same time, treatment with lycopene or silymarin had reversed the action of AFs on MDA, elevated the hepatic residue, and improved antioxidant activity. Conclusion: Lycopene and silymarin, with their potent antioxidant activity, can be used to reverse the harmful effects of AFs on hepatic and kidney tissue.