Publications by authors named "Hammadi A"

The increasing consumer demand for natural and sustainable food preservation methods has highlighted the potential of lactic acid bacteria (LAB) and their bioactive metabolites, particularly bacteriocins, as effective antimicrobial agents. This study aimed to isolate and characterize strains from Algerian traditional dried figs marinated in olive oil, a nutrient-dense and underexplored food matrix. Twelve isolates were identified as using MALDI-TOF MS and 16S rRNA gene sequencing, ensuring precise taxonomic classification.

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Introduction: COPD is a major public health concern, often complicated by cardiovascular comorbidities. Single inhaler triple therapy (SITT) has been proposed as a superior treatment option compared to single inhaler double therapies (SIDT) as LABA/LAMA and LABA/ICS. This systematic review and meta-analysis aim to evaluate the comparative efficacy of these therapies in reducing cardiovascular mortality, major adverse cardiovascular events (MACEs), and all-cause mortality (ACM).

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Pure and barium (Ba)-doped copper sulfide nanostructures were synthesized by the chemical co-precipitation method at room temperature. The pure and Ba-doped CuS nanoparticles have been compared structurally, morphologically, and optically using X-ray diffraction (XRD), transmission electron microscopy (TEM), total reflection X-ray fluorescence (TXRF), diffuse reflectance spectroscopy (DRS) and photoluminescence (PL) spectroscopy. The results of X-ray diffraction (XRD) showed that the CuS nanostructures have a hexagonal structure with crystallite sizes ranging from 15.

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Article Synopsis
  • The study investigates how varying concentrations of Zn ions affect the optical properties of BaNiZnFeO ferrites, showcasing the ability to tune the band gap through Zn doping.
  • X-ray diffraction (XRD) confirmed that the material maintained a single-phase structure and exhibited changes in grain size and lattice parameters with increased Zn content.
  • UV-visible spectroscopy demonstrated that the band gap and electrical properties improved with higher Zn concentrations, indicating potential uses in optoelectronics and energy storage applications.
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Estimating spatiotemporal maps of greenhouse gases (GHGs) is important for understanding climate change and developing mitigation strategies. However, current methods face challenges, including the coarse resolution of numerical models, and gaps in satellite data, making it essential to improve the spatiotemporal estimation of GHGs. This study aims to develop an advanced technique to produce high-fidelity (1 km) maps of CO and CH over the Arabian Peninsula, a highly vulnerable region to climate change.

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Background: Clinical trials (CTs) in children are critical for understanding and treating childhood diseases. However, there trials require prior permission from parents. We evaluated parental attitudes and perceptions regarding the recruitment of their children in CTs.

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Future space exploration missions will expose astronauts to various stressors, making the early detection of mental stress crucial for prolonged missions. Our study proposes using functional near infrared spectroscopy (fNIRS) combined with multiple machine learning models to assess the level of mental stress. The objective is to identify and quantify stress levels during 240 days confinement scenario.

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Alopecia areata (AA) is an autoimmune disorder that manifests as nonscarring hair loss and imposes a substantial disease burden. The current study, using an e-claims database, assesses the disease burden, comorbidities, treatment patterns, specialties involved in the diagnosis of AA, healthcare resource utilization (HCRU), and associated costs in privately insured patients with AA in Dubai, United Arab Emirates. The retrospective longitudinal secondary study was conducted using Dubai Real-World Database e-claims data during 01 January 2014 to 30 June 2022.

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Article Synopsis
  • * Tralokinumab is a new monoclonal antibody that blocks interleukin 13, which plays a key role in causing itching and skin issues.
  • * A case study reports a 40-year-old woman with severe dyshidrotic eczema who was successfully treated with tralokinumab, marking the first documented success of this treatment for this specific condition.
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This paper presents a high-gain low-noise amplifier (LNA) operating at the 5G mm-wave band. The full design combines two conventional cascode stages: common base (CB) and common emitter (CS). The design technique reduces the miller effect and uses low-voltage supply and low-current-density transistors to simultaneously achieve high gain and low noise figures (NFs).

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Introduction: PTEN controls upstream PI3K relatives, such as AKT. PTEN gene mutations have been documented to affect outcomes in main or distant malignancies, including breast cancer (BC). PTEN gene deletions are common in a variety of human cancers.

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Iodide ions from radioactive iodine isotopes are common contaminants present in nuclear wastewater from nuclear power plants which are considered hazardous contaminants to be released in water sources even at low concentrations due to their association with metabolic disorders, therefore its removal from the nuclear wastewater effluents is necessary. Chitosan beads are natural and cost-efficient adsorbents that have been used for ion removal from wastewater. However, issues of poor selectivity persist in achieving high-efficiency iodide ion removal.

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Vitiligo is a common chronic autoimmune disorder characterized by skin and hair depigmentation that affects 0.5%-2.0% of the global population.

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Early detection of mental stress is particularly important in prolonged space missions. In this study, we propose utilizing electroencephalography (EEG) with multiple machine learning models to detect elevated stress levels during a 240-day confinement. We quantified the levels of stress using alpha amylase levels, reaction time (RT) to stimuli, accuracy of target detection, and functional connectivity of EEG estimated by Phase Locking Value (PLV).

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The aim of this work was to synthesize 0.02 and 0.06 Mg-doped ZnO nanoparticles (NPs) using the aqueous extract of Plectranthus barbatus leaf.

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We present a theoretical study of the [3+2] cycloaddition (32CA) reactions of N-benzyl fluoro nitrone with a series of maleimides producing isoxazolidines. We use the Molecular Electron Density Theory at the MPWB1K/6-311G(d) level. We focus on the reaction mechanism, selectivity, solvent, and temperature effects.

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Nanomaterials have unique physicochemical properties compared to their bulk counterparts. Besides, biologically synthesized nanoparticles (NPs) have proven superior to other methods. This work aimed to biosynthesize zinc oxide (ZnO) NPs using an aqueous extract of seed.

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Porocarcinoma is a rare skin malignancy that should be suspected in patients with chronic skin lesions. Although it usually affects the elderly population in sun-exposed areas, it may be seen in younger populations and in nonexposed areas such as the groin.

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In this paper, tri-phase FeO-MgO-CuO nanocomposites (NCs) and pure CuO, FeO and MgO nanoparticles (NPs) were prepared using sol-gel technique. The physical properties of the prepared products were examined using SEM, XRD, and UV-visible. The XRD data indicated the formation of pure CuO, FeO and MgO NPs, as well as nanocomposite formation with FeO (cubic), MgO (cubic), and CuO (monoclinic).

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Objectives: The study aims to explore the risk factors, clinical characteristics, and outcomes of mpox infection in Abu Dhabi, United Arab Emirates (UAE).

Methods: A prospective cohort study was conducted at two communicable disease centers in Abu Dhabi, UAE and patients admitted with confirmed mpox infections between May 01, 2022 and December 31, 2022 were included in our study.

Results: A total of 176 mpox patients were admitted, of which 93% (n = 164) were men and mean age was 30.

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Hierarchical aggregates of anatase TiO nanoribbons/nanosheets (TiO-NR) and anatase TiO nanoparticles (TiO-NP) were produced through a one-step solvothermal reaction using acetic acid or ethanol and titanium isopropoxide as solvothermal reaction systems. The crystalline structure, crystalline phase, and morphologies of synthesized materials were characterized using several techniques. According to our findings, both TiO-NR and TiO-NP were found to have polycrystalline structures, with pure anatase phases.

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