Publications

Export 14888 results:
Sort by: Author Title Type [ Year  (Asc)]
2023
Noshy, P. A., N. A. E. Yasin, M. M. Rashad, A. M. Shehata, F. M. S. Salem, E. M. El-Saied, and M. Y. Mahmoud, "Zinc nanoparticles ameliorate oxidative stress and apoptosis induced by silver nanoparticles in the brain of male rats.", Neurotoxicology, vol. 95, pp. 193-204, 2023. Abstract

The current study was conducted to investigate the possible ameliorative role of zinc nanoparticles (Zn NPs) against silver nanoparticles (Ag NPs)-induced oxidative and apoptotic brain damage in adult male rats. Twenty-four mature Wistar rats were randomly and equally divided into four groups: control group, Ag NPs group, Zn NPs group, and Ag NPs + Zn NPs group. Rats were exposed to Ag NPs (50 mg/kg) and/or Zn NPs (30 mg/kg) daily by oral gavage for 12 weeks. The results revealed that exposure to Ag NPs significantly increased malondialdehyde (MDA) content, decreased catalase and reduced glutathione (GSH) activities, downregulated the relative mRNA expression of antioxidant-related genes (Nrf-2 and SOD), and upregulated the relative mRNA expression of apoptosis-related genes (Bax, caspase 3 and caspase 9) in the brain tissue. Furthermore, severe neuropathological lesions with a substantial increase in the caspase 3 and glial fibrillary acidic protein (GFAP) immunoreactivity were observed in the cerebrum and cerebellum of Ag NPs-exposed rats. Conversely, co-administration of Zn NPs with Ag NPs significantly ameliorated most of these neurotoxic effects. Collectively, Zn NPs can be used as a potent prophylactic agent against Ag NPs-induced oxidative and apoptotic neural damage.

Helal, M., M. A. Ali, A. H. Nadrin, Y. I. Awad, N. K. Younis, B. M. Alasyed, M. Jamal, D. H. Eid, H. A. Soliman, S. A. Eissa, et al., "Association between IRS-1, PPAR-γ and LEP genes polymorphisms and growth traits in rabbits", Animal BiotechnologyAnimal Biotechnology, vol. 34, issue 7: Taylor & Francis, pp. 2391 - 2399, 2023. AbstractWebsite
n/a
Fadel, F., N. El-Anwar, F. A. W. A. Maksoud, N. Mohamed, and Y. Ramadan, Cardiovascular Complications and Indoxyl Sulfate Are Related to Longer Duration of End Stage Renal Disease in Children, , vol. 3, issue 1, pp. 50 - 56, 2023. AbstractWebsite

Background: Indoxyl sulfate (IS) is a non-dialyzable gut-derived uremic toxin that is reported to be cardiotoxic in patients with advanced chronic kidney disease stages.Aim of the Work: The aim of this study was to investigate the role of IS as a risk factor for cardiovascular complications in children with end stage kidney disease (ESKD) on regular HD.Patients and Methods: This is a cross-sectional analytical study that included children with ESKD on regular hemodialysis (HD) for at least 6 months following at Nephrology Unit of Cairo University Pediatric Hospitals. Serum IS level was measured for all patients by the enzyme-linked immunosorbent assay (ELISA). Cardiac complications was assessed using the M mode and 2D transthoracic echocardiography.Results: The study comprised 88 children with ESKD on regular HD for a mean ± SD of 31.94 ± 26.05 months, with a mean age ± SD of 9 ± 3.2 years (range 3.3- 14 years). Of them 52 (59.1%) were males. Obstructive uropathy (28.4%), and focal segmental glomerulosclerosis (20.5%), were the main causes of ESKD in the study group. Cardiovascular complications were identified in 48 (54.5%) patients in the form of dilated cardiomyopathy in 44 (50%) children with decreased fractional shortening <30% and moderate to severe left ventricular hypertrophy above 95th for age and gender in 10 (11.4%). Cardiovascular affection correlated with duration of HD, hypertension, and IS serum level (p=<0.001 for each). Hypertension was reported in 55 (62.5%) of patients, and vascular access related complications were evident in 40 (45.4%) patients with thrombosis being the commonest complication in 16 (18.1%). The mean IS was 29.14 ± 17.43 μg/ml in ESKD patients with normal cardiac function, and 77 ± 15.18 μg/ml among those with cardiac compromise (p < 0.001). The IS level correlated with longer duration of HD (p= 0.002), and older age (p= 0.043). IS level and duration of HD did not predict cardiomyopathy, (p=0.192), and (p=0.760) respectively.Conclusion: Cardiac complications are common among children on HD. Both cardiovascular complications and IS accumulation correlated positively with longer duration of HD, and age of children with ESKD. IS is non-dialysable and there is a need to control its production from the gut.

Fadel, F., N. El-Anwar, F. A. W. A. Maksoud, N. Mohamed, and Y. Ramadan, Cardiovascular complications and indoxyl sulfate are related to longer duration of end stage renal disease in children, , vol. 3, issue 1: Cairo University, Faculty of Medicine, Department of Pediatrics, pp. 50 - 56, 2023. Abstract
n/a
Abbas, E. Y., M. I. Ezzat, N. M. Ramadan, A. Eladl, W. H. E. Hamed, M. M. Abdel-Aziz, M. teaima, H. M. E. Hefnawy, and E. Abdel-Sattar, "Characterization and anti-aging effects of Opuntia ficus-indica (L.) Miller extracts in a d-galactose-induced skin aging model", Food & Function, vol. 14, issue 7: The Royal Society of Chemistry, pp. 3107 - 3125, 2023. AbstractWebsite

Opuntia ficus-indica (L.) Miller (OFI), belonging to the family Cactaceae, is widely cultivated not only for its delicious fruits but also for its health-promoting effects, which enhance the role of OFI as a potential functional food. In this study, the in vitro collagenase and elastase enzyme inhibitory effects of extracts from different parts of OFI were evaluated. The most promising extracts were formulated as creams at two concentrations (3 and 5%) to investigate their effects on a d-galactose (d-gal)-induced skin-aging mouse model. The ethanolic extracts of the peel and cladodes exhibited the highest enzyme inhibitory effects. Cream made from the extract of OFI peel (OP) (5%) and cream from OFI cladodes extract (OC) (5%) significantly decreased the macroscopic aging of skin scores. Only a higher concentration (5%) of OC showed the normalization of superoxide dismutase (SOD) and malondialdehyde (MDA) skin levels and achieved significant improvements as compared to the vitamin E group. Both OC and OP (5%) showed complete restoration of the normal skin structure and nearly normal collagen fibres upon histopathological examination. The Ultra-Performance Liquid Chromatography High Resolution Mass Spectrometry (UHPLC-ESI-TOF-MS) metabolite profiles revealed the presence of organic acids, phenolic acids, flavonoids, betalains, and fatty acids. Flavonoids were the predominant phytochemical class (23 and 22 compounds), followed by phenolic acids (14 and 17 compounds) in the ethanolic extracts from the peel and cladodes, respectively. The anti-skin-aging effects could be attributed to the synergism of different phytochemicals in both extracts. From these findings, the OFI peel and cladodes as agro-waste products are good candidates for anti-skin-aging phytocosmetics.

Sakr, O. G., A. Gad, K. Cañón-Beltrán, Y. N. Cajas, R. Prochazka, D. Rizos, and P. G. Rebollar, "Characterization and identification of extracellular vesicles-coupled miRNA profiles in seminal plasma of fertile and subfertile rabbit bucks", Theriogenology, vol. 209, pp. 76 - 88, 2023. AbstractWebsite

Seminal plasma (SP) provides essential nutrients, transport, and protection to the spermatozoa during their journey through the male and female reproductive tracts. Extracellular vesicles (EVs) are one of the main components of the SP with several biomolecular cargoes, including miRNAs, that can influence spermatozoa functions and interact with the cells of the female reproductive tract. This study aimed to isolate, characterize, and identify the miRNA expression profiles in the SP-EVs isolated from fertile (F) and subfertile (S) rabbit bucks that could serve as fertility biomarkers. In this study, the methods to isolate and identify EVs including exosomes, from SP of 3 F and S bucks have been developed. Ultracentrifugation and size exclusion chromatography analysis were using to isolate EVs from SP of F and S males that were qualitative and quantitively characterised using transmission electron microscopy, nanoparticle tracking analysis and western blotting. In addition, total RNA, including miRNA, was isolated, sequenced and identified from SP-EVs samples. Different SP-EVs concentrations (8.53 × 1011 ± 1.04 × 1011 and 1.84 × 1012 ± 1.75 × 1011 particles/mL of SP; P = 0.008), with a similar average size (143.9 ± 11.9 and 115.5 ± 2.4 nm; P = 0.7422) in F and S males, respectively was observed. Particle size was not significantly correlated with any kinetic parameter. The concentration of SP-EVs was positively correlated with the percentage of abnormal forms (r = 0.94; P < 0.05) and with the percentage of immotile spermatozoa (r = 0.88; P < 0.05). Small-RNA-seq analysis identified a total of 267 and 244 expressed miRNAs in the F and S groups, respectively. Two miRNAs (let-7b-5p and let-7a-5p) were the top most abundant miRNAs in both groups. Differential expression analysis revealed that 9 miRNAs including miR-190b-5p, miR-193b-5p, let-7b-3p, and miR-378–3p, and another 9 miRNAs including miR-7a-5p, miR-33a-5p, miR-449a-5p, and miR-146a-5p were significantly up- and downregulated in the F compared to the S group, respectively. The SP from F and S rabbit males contains EVs with different miRNA cargo correlated with spermatogenesis, homeostasis, and infertility, which could be used as biomarkers for male fertility and potential therapies for assisted reproductive technologies.

Tantawy, M. A., I. A. Wahba, Samah S Saad, and N. K. Ramadan, Classical versus chemometrics tools for spectrophotometric determination of fluocinolone acetonide, ciprofloxacin HCl and ciprofloxacin impurity-A in their ternary mixture, , vol. 17, issue 1, pp. 49, 2023. AbstractWebsite

Green, simple, accurate and robust univariate and chemometrics assisted UV spectrophotometric approaches have been adopted and validated for concurrent quantification of fluocinolone acetonide (FLU), ciprofloxacin HCl (CIP) together with ciprofloxacin impurity-A (CIP imp-A) in their ternary mixture. Double-divisor ratio spectra derivative (DDRD) method has been used for determination of FLU. On the other hand, the first (D1) and second (D2) derivative approaches have been applied for the quantification of CIP and CIP imp-A, respectively. For the ratio difference (RD), derivative ratio (DR), and mean centering of ratio spectra (MC) methods, CIP and its impurity A have been simultaneously determined. The acquired calibration plots were linear over the concentration range of 0.6–20.0 μg/mL, 1.0–40.0 μg/mL and 1.0–40.0 μg/mL for fluocinolone acetonide, ciprofloxacin HCl, and ciprofloxacin impurity-A, respectively. The chemometrics methods namely; partial least squares (PLS) and artificial neural networks (ANN) were used for the concurrent determination of the three adopted components via using twenty-five mixtures as calibration set and fifteen mixtures as validation one. The investigated approaches were validated in accordance with International Council for Harmonisation (ICH) guidelines, and statistically compared with the official ones. The proposed methods were acceptably applied to the examination of FLU and CIP in their pure powders and pharmaceutical ear drops.

Tantawy, M. A., I. A. Wahba, Samah S Saad, and N. K. Ramadan, Classical versus chemometrics tools for spectrophotometric determination of fluocinolone acetonide, ciprofloxacin HCl and ciprofloxacin impurity-A in their ternary mixture, , vol. 17, issue 1, pp. 49, 2023. AbstractWebsite

Green, simple, accurate and robust univariate and chemometrics assisted UV spectrophotometric approaches have been adopted and validated for concurrent quantification of fluocinolone acetonide (FLU), ciprofloxacin HCl (CIP) together with ciprofloxacin impurity-A (CIP imp-A) in their ternary mixture. Double-divisor ratio spectra derivative (DDRD) method has been used for determination of FLU. On the other hand, the first (D1) and second (D2) derivative approaches have been applied for the quantification of CIP and CIP imp-A, respectively. For the ratio difference (RD), derivative ratio (DR), and mean centering of ratio spectra (MC) methods, CIP and its impurity A have been simultaneously determined. The acquired calibration plots were linear over the concentration range of 0.6–20.0 μg/mL, 1.0–40.0 μg/mL and 1.0–40.0 μg/mL for fluocinolone acetonide, ciprofloxacin HCl, and ciprofloxacin impurity-A, respectively. The chemometrics methods namely; partial least squares (PLS) and artificial neural networks (ANN) were used for the concurrent determination of the three adopted components via using twenty-five mixtures as calibration set and fifteen mixtures as validation one. The investigated approaches were validated in accordance with International Council for Harmonisation (ICH) guidelines, and statistically compared with the official ones. The proposed methods were acceptably applied to the examination of FLU and CIP in their pure powders and pharmaceutical ear drops.

Abdelgwad, M., W. Tawfik, A. Zedan, and O. Radwan, Determination of Saturated and Unsaturated Hydrocarbons in Petroleum Oil Pesticides using FTIR Spectroscopy, , pp. - , 2023. AbstractWebsite

Petroleum oil pesticides are used as acaricides, insecticides, and herbicides. Oils can cause phytotoxicity if oils contain unsaturated hydrocarbons. Traditional chemical methods to determine unsulfonated residue (UR), such as the ASTM D483 and MT (57), depending on sulfuric acid 98% reagent. The present study introduces a new optical spectroscopic method using FTIR to determine unsaturated Petroleum oil pesticides. The integral intensities of the bands at about 1640 to 1643 cm−1 correspond to ν(C=C). In alkynes, (C≡C 2140-2100 cm-1). Three technical petroleum oil samples are collected from three different companies in Egypt. (El-Mostakble for Chemicals Co.(S1), Kafr El-Zayate for Pesticides and Chemicals (KZ)(S2), and Misr Petroleum Refining Co(S3). FTIR results showed peaks demonstrated more absorbance while transmittance decreased in all samples at 1643 to 1640 cm-1 and 2121 cm-1 when adding 1-octene 99% and 1-Heptyne 99% to the oil of all samples. Therefore, FTIR can detect and determine unsaturated technical petroleum oils. Moreover, the method of FTIR has advantages in preventing exposure to the toxicity of acids and can differentiate between carbon double bond and triple bond

Abdelaziem, A., A. M. Mohamed, Y. M. Yousry, R. Borayek, A. S. Razeen, N. Zhang, S. Chen, L. Zhang, K. Lin, and Z. Liu, "Effect of poling on the dielectric properties of synthesized β-poly (vinylidene fluoride) foam", Journal of Applied PhysicsJournal of Applied Physics, vol. 133, issue 12: American Institute of Physics, pp. 124101, 2023. AbstractWebsite
n/a
Ratep, A., A. AbdelAziem, M. Y. Hanfi, K. A. Mahmoud, and I. Kashif, Enhancing gamma-ray shielding with bismuth oxide-infused boron oxides, , vol. 56, issue 2, pp. 143, 2023. AbstractWebsite

The objective of this study is to explore how the replacement of barium oxide (BaO) by bismuth oxide (Bi2O3) affects the optical, structural and gamma rays shield ability of borate glasses. To accomplish this, a series of borate-based glasses was fabricated according the chemical formula 60B2O3 + (40-x) BaO + xBi2O3, where 0 < x < 10 wt.%. X-ray diffraction confirmed that an amorphous phase was present at all fabricated glasses. Thermal analysis indicated that Bi2O3 could serve as a glass modifier for all values of x greater than zero. Furthermore, the optical absorption profile showed that the samples had a greater absorption rate as x increased within the 1–4 eV photon energy range, with only minor fluctuations beyond 4 eV. Monte Carlo simulation demonstrated that increasing the concentration of Bi2O3 led to an increased radiation-absorbing capacity, where the linear attenuation coefficient of the fabricated glasses enhanced by 26% from 74.48 to 94.17 cm−1 at gamma ray energy of 0.015 MeV. Simultaneously, the half value thickness for the fabricated glasses reduced from 3.99 to 3.73 cm, raising the Bi2O3 concentration between 0 and 10 wt.%, respectively. These results indicate that adding Bi2O3 to boron oxides can significantly improve shielding the ability of the material to against gamma rays, alter the glass samples, and potentially be cost-effective. This study could lead to faster synthesis processes for glass modifiers, with important implications for designing and producing materials to shield against harmful gamma rays in industrial and medical applications.

Kachapila, M., M. Monahan, A. O. Ademuyiwa, Y. M. Adinoyi, B. M. Biccard, C. George, D. N. Ghosh, J. Glasbey, D. G. Morton, O. Osayomwanbo, et al., Exploring the cost-effectiveness of high versus low perioperative fraction of inspired oxygen in the prevention of surgical site infections among abdominal surgery patients in three low- and middle-income countries, , vol. 7, pp. 100207, 2023. AbstractWebsite

BackgroundThis study assessed the potential cost-effectiveness of high (80–100%) vs low (21–35%) fraction of inspired oxygen (FiO2) at preventing surgical site infections (SSIs) after abdominal surgery in Nigeria, India, and South Africa.
Methods
Decision-analytic models were constructed using best available evidence sourced from unbundled data of an ongoing pilot trial assessing the effectiveness of high FiO2, published literature, and a cost survey in Nigeria, India, and South Africa. Effectiveness was measured as percentage of SSIs at 30 days after surgery, a healthcare perspective was adopted, and costs were reported in US dollars ($).
Results
High FiO2 may be cost-effective (cheaper and effective). In Nigeria, the average cost for high FiO2 was $216 compared with $222 for low FiO2 leading to a −$6 (95% confidence interval [CI]: −$13 to −$1) difference in costs. In India, the average cost for high FiO2 was $184 compared with $195 for low FiO2 leading to a −$11 (95% CI: −$15 to −$6) difference in costs. In South Africa, the average cost for high FiO2 was $1164 compared with $1257 for low FiO2 leading to a −$93 (95% CI: −$132 to −$65) difference in costs. The high FiO2 arm had few SSIs, 7.33% compared with 8.38% for low FiO2, leading to a −1.05 (95% CI: −1.14 to −0.90) percentage point reduction in SSIs.
Conclusion
High FiO2 could be cost-effective at preventing SSIs in the three countries but further data from large clinical trials are required to confirm this.

Gad, A., K. Joyce, N. G. Menjivar, D. Heredia, C. S. Rojas, D. Tesfaye, and A. Gonella-Diaza, "Extracellular vesicle-microRNAs mediated response of bovine ovaries to seasonal environmental changes", Journal of Ovarian Research, vol. 16, issue 1, pp. 101, 2023. AbstractWebsite

Among the various seasonal environmental changes, elevated ambient temperature during the summer season is a main cause of stress in dairy and beef cows, leading to impaired reproductive function and fertility. Follicular fluid extracellular vesicles (FF-EVs) play an important role in intrafollicular cellular communication by, in part, mediating the deleterious effects of heat stress (HS). Here we aimed to investigate the changes in FF-EV miRNA cargoes in beef cows in response to seasonal changes: summer (SUM) compared to the winter (WIN) season using high throughput sequencing of FF-EV-coupled miRNAs. In addition to their biological relevance, the potential mechanisms involved in the packaging and release of those miRNAs as a response to environmental HS were elucidated.

Safaa, H., R. Khaled, S. Isaac, R. Mostafa, M. Ragab, D. A. A. Elsayed, and M. Helal, Genome-wide in silico characterization, validation, and cross-species transferability of microsatellite markers in Mallard and Muscovy ducks, , vol. 21, issue 1, pp. 105, 2023. AbstractWebsite

Microsatellites are important markers for livestock including ducks. The development of microsatellites is expensive and labor-intensive. Meanwhile, the in silico approach for mining for microsatellites became a practicable alternative. Therefore, the current study aimed at comparing whole-genome and chromosome-wise microsatellite mining approaches in Muscovy and Mallard ducks and testing the transferability of markers between them. The GMATA software was used for the in silico study, and validation was performed using 26 primers.

Valdenaire, A., A. E. Giba, M. Stoffel, X. Devaux, L. Foussat, J. - M. Poumirol, C. Bonafos, S. Guehairia, R. Demoulin, E. Talbot, et al., "Heavily Doped Si Nanocrystals Formed in P-(SiO/SiO2) Multilayers: A Promising Route for Si-Based Infrared Plasmonics", ACS Applied Nano MaterialsACS Applied Nano Materials, vol. 6, issue 5: American Chemical Society, pp. 3312 - 3320, 2023. AbstractWebsite
n/a
Zhang, M., J. - M. Poumirol, N. Chery, H. Rinnert, A. E. Giba, R. Demoulin, E. Talbot, F. Cristiano, T. Hungria, V. Paillard, et al., "Hyperdoped Si nanocrystals embedded in silica for infrared plasmonics", Nanoscale, vol. 15, issue 16: The Royal Society of Chemistry, pp. 7438 - 7449, 2023. AbstractWebsite

We present the experimental realization of plasmonic hyperdoped Si nanocrystals embedded in silica via a combination of sequential low energy ion implantation and rapid thermal annealing. We show that phosphorus dopants are incorporated into the nanocrystal cores at concentrations up to six times higher than P solid solubility in bulk Si by combining 3D mapping with atom probe tomography and analytical transmission electron microscopy. We shed light on the origin of nanocrystal growth at high P doses, which we attribute to Si recoiling atoms generated in the matrix by P implantation, which likely increase Si diffusivity and feed the Si nanocrystals. We show that dopant activation enables partial nanocrystal surface passivation that can be completed by forming gas annealing. Such surface passivation is a critical step in the formation of plasmon resonance, especially for small nanocrystals. We find that the activation rate in these small doped Si nanocrystals is the same as in bulk Si under the same doping conditions.

Fathy, M. M., A. A. Elfiky, Y. S. Bashandy, M. M. Hamdy, A. M. Elgharib, I. M. Ibrahim, R. T. Kamal, A. S. Mohamed, A. M. Rashad, O. S. Ahmed, et al., "An insight into synthesis and antitumor activity of citrate and gallate stabilizing gold nanospheres", Scientific Reports, vol. 13, issue 1, 2023. AbstractWebsite

Both gallic and citrate are well-established antioxidants that show promise as new selective anti-cancer drugs. Gold nanoparticles (AuNPs) as well can be developed as flexible and nontoxic nano-carriers for anti-cancer drugs. This article evaluating the efficiency and biocompatibility of gallic acid and citrate capping gold nanoparticles to be used as anti-cancer drug. The biosafety and therapeutic efficiency of prepared nano-formulations were tested on Hela and normal BHK cell line. Gold nanospheres coated with citrate and gallate were synthesized via wet chemical reduction method. The prepared nano-formulations, citrate and gallate coated gold nanospheres (Cit-AuNPs and Ga-AuNPs), were characterized with respect to their morphology, FTIR spectra, and physical properties. In addition, to assess their cytotoxicity, cell cycle arrest and flow cytometry to measure biological response were performed. Cit-Au NPs and Ga-Au NPs were shown to significantly reduce the viability of Hela cancer cells. Both G0/G cell cycle arrest and comet assay results showed that genotoxic effect was induced in Hela cells by Cit-Au NPs and Ga-Au NPs. The results of this study showed that Cit-Au NPs and Ga-AuNPs inhibit the growth of metastatic cervical cancer cells, which could have therapeutic implications. © 2023, The Author(s).

Sadek, K. M., S. El Moshy, I. A. Radwan, D. Rady, M. M. S. Abbass, A. A. El-Rashidy, C. E. Dörfer, and K. M Fawzy El-Sayed, "Molecular Basis beyond Interrelated Bone Resorption/Regeneration in Periodontal Diseases: A Concise Review", International Journal of Molecular Sciences, vol. 24, issue 5, 2023. Abstract

Periodontitis is the sixth most common chronic inflammatory disease, destroying the tissues supporting the teeth. There are three distinct stages in periodontitis: infection, inflammation, and tissue destruction, where each stage has its own characteristics and hence its line of treatment. Illuminating the underlying mechanisms of alveolar bone loss is vital in the treatment of periodontitis to allow for subsequent reconstruction of the periodontium. Bone cells, including osteoclasts, osteoblasts, and bone marrow stromal cells, classically were thought to control bone destruction in periodontitis. Lately, osteocytes were found to assist in inflammation-related bone remodeling besides being able to initiate physiological bone remodeling. Furthermore, mesenchymal stem cells (MSCs) either transplanted or homed exhibit highly immunosuppressive properties, such as preventing monocytes/hematopoietic precursor differentiation and downregulating excessive release of inflammatory cytokines. In the early stages of bone regeneration, an acute inflammatory response is critical for the recruitment of MSCs, controlling their migration, and their differentiation. Later during bone remodeling, the interaction and balance between proinflammatory and anti-inflammatory cytokines could regulate MSC properties, resulting in either bone formation or bone resorption. This narrative review elaborates on the important interactions between inflammatory stimuli during periodontal diseases, bone cells, MSCs, and subsequent bone regeneration or bone resorption. Understanding these concepts will open up new possibilities for promoting bone regeneration and hindering bone loss caused by periodontal diseases.

El-Shemy, A. A., M. Bosila, H. Mekky, F. Radwan, K. M. ELBAYOUMI, M. M. Amer, and M. Elaish, Molecular diagnosis and identification of avian influenza H5N8 in Pekin ducks, , vol. 87, 2023. Abstract
n/a
Ateia, E. E., O. Rabie, and A. T. Mohamed, "Multi-susceptible single-phased hexaferrite with significant magnetic switching properties by selectively doping", Physica Scripta, vol. 98, issue 6: IOP Publishing, pp. 065801, 2023. AbstractWebsite

An effective combustion technique is used to synthesize Sr0.8La0.2Fe12-xCuxO19 (x = 0,1) M-type strontium hexagonal ferrite nanoparticles (SHFNPs). The impact of La and La-Cu substitution on the structural, microstructural, and magnetic characteristics of SHFNPs is scrutinized. The samples are characterized using several experimental techniques, such as x-ray diffraction (XRD), Raman spectroscopy (RS), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), and vibrating sample magnetometer (VSM). The obtained results reveal that the single lattice structure of the substituted strontium hexaferrite can be acquired by transforming Fe3+ to Fe2+ on the 2a site. Raman spectroscopy (RS) verifies the formation of all crystallographic sites of hexaferrite. The broadening of 4f2 and 12k peaks indicates the presence of disorder at the crystal sites resulting from the change in the chemical environment after doping with Cu2+ ions. FESEM images reveal flat hexagonal facets of the particle that signify the magneto-plumbite structure. The magnetic results provide high values of both intrinsic coercivity and (BH)max. The obtained data constitute good magnetic characteristics for perpetual magnet applications. Furthermore, the reduced coercivity of the Sr0.8La0.2Fe11CuO19 (SLCHF) sample with high magnetizations can be used to create microwave absorbing and data storage materials.

Rashad, Y. M., Z. A. M. Baka, and T. A. A. Moussa, "Mycotoxins and Their Producers: Diversity, Side Effects and Control", Plant Mycobiome: Diversity, Interactions and Uses: Springer, pp. 1 - 27, 2023. Abstract
n/a
Kamal, S. M., T. A. Ali, and N. A. D. I. A. H. RAFAT, New designs of 4 × 2 photonic crystal encoders using ring resonators, , vol. 55, issue 3, pp. 261, 2023. AbstractWebsite

Optical encoders are pivotal elements in optical communication applications. There is much need for ultra-compact and high-speed novel designs. This work proposes two new designs of fast, compact 4 × 2 optical encoders using two dimensional photonic crystals. The proposed structures consist of square lattice silicon rods embedded in an air background. The operation of these encoders is based on the wave interference technique. The encoders are designed to help in achieving better performance through increasing the contrast ratio and decreasing the power loss and the return loss. The PWE method is used to analyze the photonic band gap. We used FDTD simulation to obtain the electric field distribution inside each structure and the normalized output power. We prove that the scattering rods improve the directivity of the light toward the desired paths and decrease the backward reflection. The proposed encoders have small footprint areas of 204.8 and 160.4 μm2 and operate at wavelength 1550 nm. They achieve low response time (254 and 163 fs) and high contrast ratio (6.69 and 12.9 dB). Simplicity and compactness of the designs make them suitable for optical signal processors and photonic integrated circuits. Another advantage of these designs is that low input power is enough for the encoders’ operation, because there is no non-linear materials included. Our designs compete with the published works in the last few years especially in their footprint and response time.