29 results match your criteria: "University of Science and Technology Houari Boumediene (USTHB)[Affiliation]"

Introduction:  Research on the association between blood groups and cardiovascular diseases (CVDs) in Africa, including Algeria, is notably limited, with a primary focus on blood donors. This narrow scope hinders a comprehensive understanding of the genetic diversity of blood groups and their potential links to CVD risk within the African context. To bridge this knowledge gap, this study proposes to investigate the distribution of blood group genotypes and their association with CVD prevalence, aiming to enhance knowledge within the African context and contribute to global insights into the relationship between blood groups and CVD.

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The present study aimed to assess organ doses and the associated cancer risks related to secondary radiation (photons and neutrons) exposure during 3D Conformational Radiotherapy (3D-CRT) for patients with prostate cancer in Algeria. To this purpose, a detailed geometric Monte Carlo (MC) modeling of the LINAC, combined with a hybrid whole-body phantom was carried out. The secondary radiation doses were calculated in patient's organs, both within and outside the field.

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Equation of state and universal solid phase of one-dimensional dipolar fluids.

J Phys Condens Matter

December 2024

Laboratoire de Physique et Chimie Théoriques, LPCT-UMR CNRS 7019, Université de Lorraine, 1 Boulevard Arago, 57070 Metz, France.

Macroscopic and structural properties of one-dimensional (1D) dipolar fluids are investigated theoretically. The equation of state is fully explored by means of analytical limiting laws, integral equations and corroborating Monte Carlo simulations. An interesting mapping with the Tonks gas (i.

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The exchange of medical images and patient data over the internet has attracted considerable attention in the past decade, driven by advancements in communication and health services. However, transferring confidential data through insecure channels, such as the internet, exposes it to potential manipulations and attacks. To ensure the authenticity of medical images while concealing patient data within them, this paper introduces a high-capacity and reversible fragile watermarking model in which an authentication watermark is initially generated from the cover image and merged with the patient's information, photo, and medical report to form the global watermark.

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Theoretical Study of Copper Squarate as a Promising Adsorbent for Small Gases Pollutants.

Molecules

July 2024

Laboratory of Thermodynamics and Molecular Modeling, Faculty of Chemistry, University of Science and Technology Houari Boumediene (USTHB), BP32, El Alia, Bab Ezzouar, Algiers 16111, Algeria.

Article Synopsis
  • - Copper squarate is a metal-organic framework with a unique structure that allows for the adsorption of small pollutants, primarily greenhouse gases, while also showing some capability for larger pollutants.
  • - The study employs theoretical methods, mainly density functional theory, to analyze how effectively this material adsorbs different molecules, revealing a range of adsorption energies and the impact of water on this process.
  • - Results indicate that copper squarate is an effective adsorbent for small pollutants and greenhouse gases, but water presence inhibits its adsorption capabilities; furthermore, Monte Carlo simulations were used to assess adsorption isotherms for various molecules.
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Conductive polymers such as polypyrrole have been widely used as pseudo-capacitive electrodes for supercapacitors. This work demonstrates a simple method to improve the performance of conductive polymer electrodes by adding montmorillonite in order to perform capacitive behavior. Conductive composite polymers (CCPs) based on montmorillonite/polypyrrole (MMT/PPy(Cl)) have been synthesized by polymerization using FeCl as an oxidizing agent.

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Abstract: Myasthenia gravis (MG) is an autoimmune disease of multifactorial etiology in which genetic factors and cytokines seem to play an important role. The aim of this study was to investigate potential associations of cytokines single nucleotide polymorphisms (SNPs) and MG in Algerian patients. We performed a case-control study that included 27 patients and 74 healthy subjects.

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Dialects have received bigger interest in recent years as they are increasingly used on the web and social media. Because Algerian Arabic dialects suffer from a lack of appropriate speech corpora for speech recognition, a rich dialect corpus is needed to approach Algerian Accent recognition. The latter remains a key feature in the field of Forensic Voice Comparison (FVC) systems.

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Culturing the desert microbiota.

Front Microbiol

April 2023

CEA, CNRS, BIAM, LEMiRE, Aix-Marseille Université, Saint-Paul-lèz-Durance, France.

Over the last 30 years, the description of microbial diversity has been mainly based on culture-independent approaches (metabarcoding and metagenomics) allowing an in-depth analysis of microbial diversity that no other approach allows. Bearing in mind that culture-dependent approaches cannot replace culture-independent approaches, we have improved an original method for isolating strains consisting of "culturing" grains of sand directly on Petri dishes (grain-by-grain method). This method allowed to cultivate up to 10% of the bacteria counted on the surface of grains of the three sites studied in the Great Western Erg in Algeria (Timoudi, Béni Abbès, and Taghit), knowing that on average about 10 bacterial cells colonize each grain.

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Bacterial diversity and community structure in the rhizosphere of the halophyte Halocnemum strobilaceum in an Algerian arid saline soil.

Extremophiles

June 2022

Team of Soil Biology, Laboratory of Organisms Biology and Physiology, Faculty of Biological Sciences, University of Science and Technology Houari Boumediene (USTHB), BP 32 El Alia, 16111, Bab Ezzouar, Algiers, Algeria.

Hypersaline ecosystems host a particular microbiota, which can be specifically recruited by halophytes. In order to broaden our knowledge of hypersaline ecosystems, an in natura study was conducted on the microbiota associated with the halophyte Halocnemum strobilaceum from alkaline-saline arid soil in Algeria. We collected and identified a total of 414 strains isolated from root tissues (RT), root-adhering soil (RAS), non-adhering rhizospheric soil (NARS) and bulk soil (BS) using different NaCl concentrations.

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This work aims to synthesize and characterize a material that can be used as an effective catalyst for photocatalytic application to remove both organic and inorganic compounds from wastewater. In this context, sillenite BiZnO (BZO) in a pure phase was synthesized using the sol-gel method. Before calcination, differential scanning calorimetry (DSC) analysis was done to determine the temperature of the formation of the sillenite phase, which was found to be 800 °C.

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Effects of iron ions, doping methods and nanotubular morphology on TiO solar photocatalytic performance.

Water Sci Technol

June 2021

Laboratory of Transfer Phenomena (LPDT), Faculty of Mechanical and Process Engineering, University of Science and Technology Houari Boumediene (USTHB), El Alia, BP32, Bab Ezzouar, 16111 Algiers, Algeria E-mail:

The effects of Fe and Fe as TiO cocatalysts were studied, and the experimental results showed that Fe was more efficient than Fe, which needed an intermediate reaction to produce hydroxyl radicals. TiO was modified with the aim of improving its structural, optical, and adsorption properties, thus improving its photocatalytic performance. The light range of the catalyst activation process was expanded, which increased the catalyst's ability to absorb visible light.

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Is protein carbonylation a biomarker of seed priming and ageing?

Funct Plant Biol

May 2021

University of Science and Technology Houari Boumediene (USTHB), Faculty of Biological Sciences, Laboratory of Biology and Physiology of Organisms, BP 32 El Alia, 16111 Bab Ezzouar Algiers (Algeria); and Corresponding author. Email:

For a long time, it has been known that seed priming allows the improvement of plant production and tolerance to abiotic stresses. However, a negative effect on the longevity of the seeds thus primed was observed; these mechanisms are still poorly understood. In addition, it has been shown by several authors that seed ageing is associated with the oxidation and particularly with carbonylation of protein.

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Heavy metal concentrations in wild and farmed gilthead sea bream from southern Mediterranean Sea-human health risk assessment.

Environ Sci Pollut Res Int

June 2021

Laboratory of Conservation and Valorization of Marine Resources, National Higher School of Marine Science and Coastal Management (ENSSMAL), University Campus of Dely Ibrahim, Bois des Cars, 16320, Algiers, Algeria.

Arsenic, cadmium, copper, lead, and zinc concentrations in the edible part of wild and farmed Sparus aurata from Algerian coastal were determined. The highest concentrations of cadmium (0.0078 mg kg wet weight), copper (0.

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Atomic and Molecular Species Post-2 μs Dynamics in Laser-Induced Carbon Plasmas in Air.

Appl Spectrosc

March 2021

Laboratory of Theoretical Computational Chemistry and Photonics, Faculty of Chemistry, University of Science and Technology Houari Boumediene (USTHB), BP 32 El-alia, Bab Ezzouar, Algiers 16111, Algeria.

Laser-induced carbon plasma in air undergoes various physicochemical processes that affect the kinetic chemistry of species of the plasma plume. We report the time- and space-resolved characterization of carbon plasma produced by infrared nanosecond laser into air at atmospheric pressure. Investigating the laser fluence effect highlights dissociation for fluences >40 J cm, and recombination processes in the fluence range of 10-40 J cm.

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Distillation time effecting on the composition of essential oils and their antioxidant and antimicrobial activities.

Z Naturforsch C J Biosci

March 2021

Laboratory of Industrial Process Engineering Sciences, Faculty of Mechanical and Process Engineering, University of Sciences and Technology Houari Boumediene (USTHB), Bab Ezzouar, Algiers, Algeria.

The essential oils (EOs) of Munby, an aromatic and medicinal plant endemic in Algeria, were extracted by different hydrodistillation times (30 min, 1, 2 and 3 h) and analyzed by GC and GC-MS. The chromatographic analysis showed that thymol (32.7-45.

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Background: Cerastes cerastes venom contains several bioactive proteins with inhibitory potential of platelet aggregation and blood coagulation.

Objective: The current study deals with purification, characterization and determination of structural properties of Cc-PDE, the first phosphodiesterase from Cerastes cerastes venom.

Material And Methods: The purification process consists of three successive chromatographies including G75-Sephadex size exclusion, DEAE exchange chromatography and affinity using Sildenafil as a main PDEs' specific inhibitor.

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Background: Integrating genome-wide gene expression patient profiles with regulatory knowledge is a challenging task because of the inherent heterogeneity, noise and incompleteness of biological data. From the computational side, several solvers for logic programs are able to perform extremely well in decision problems for combinatorial search domains. The challenge then is how to process the biological knowledge in order to feed these solvers to gain insights in a biological study.

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A hypercaloric diet induces hepatic oxidative stress, infiltration of lymphocytes, and mitochondrial reshuffle in Psammomys obesus, a murine model of insulin resistance.

C R Biol

December 2019

Institut Curie, Centre de recherche, 91405 Orsay, France; INSERM, U1196, 91405 Orsay, France; CNRS, UMR9187, 91405 Orsay, France; Université Paris-Sud, Université Paris-Saclay, 91190 Saint-Auban, France.

The aim of this study was to show, for the first time, the effect of a hypercaloric diet on the mitochondrial reshuffle of hepatocytes during the progression from steatosis to steatohepatitis to cirrhosis in Psammomys obesus, a typical animal model of the metabolic syndrome. Metabolic and oxidative stresses were induced by feeding the animal through a standard laboratory diet (SD) for nine months. Metabolic parameters, liver malondialdehyde (MDA) and glutathione (GSH), were evaluated.

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Vigna unguiculata seed priming is related to redox status of plumule, radicle and cotyledons.

Funct Plant Biol

June 2019

University of Science and Technology Houari Boumediene (USTHB), Faculty of Biological Sciences, Laboratory of Biology and Physiology of Organisms, BP 32 El Alia, 16111 Bab Ezzouar Algiers (Algeria).

Pre-germination treatments represent the physiological methods that improve plant production by modulating the metabolic activities of germination before the emergence of the radicle. It was suggested that reactive oxygen species (ROS) play a crucial role in signalling seed germination. Our work consisted in studying changes in the redox status in the embryonic axis (radicle and plumule) and in cotyledons of Vigna unguiculata (L.

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The use of data issued from high throughput technologies in drug target problems is widely widespread during the last decades. This study proposes a meta-heuristic framework using stochastic local search (SLS) combined with random forest (RF) where the aim is to specify the most important genes and proteins leading to the best classification of Acute Myeloid Leukemia (AML) patients. First we use a stochastic local search meta-heuristic as a feature selection technique to select the most significant proteins to be used in the classification task step.

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Background: During the last years, several approaches were applied on biomedical data to detect disease specific proteins and genes in order to better target drugs. It was shown that statistical and machine learning based methods use mainly clinical data and improve later their results by adding omics data. This work proposes a new method to discriminate the response of Acute Myeloid Leukemia (AML) patients to treatment.

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This work represents the first initiative to analyze the distribution of in Algeria and to evaluate the biological potential of the isolates. A total of 157 isolates were recovered, with at least one isolate in 94.4% of the samples.

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Psammomys obesus, a unique model of metabolic syndrome, inflammation and autophagy in the pathologic development of hepatic steatosis.

C R Biol

March 2017

Institut Curie, Centre de Recherche, 91405 Orsay, France; Inserm, U1196, 91405 Orsay, France; CNRS, UMR9187, 91405 Orsay, France; Université Paris-Sud, Université Paris-Saclay, 91190 Saint-Auban, France.

The aim of our transmission electron microscope study was to show, for the first time, the alteration of liver cells involved in the evolution of steatosis to steatohepatitis on a murine model of the diet-induced metabolic syndrome, Psammomys obesus. This pathologic evolution was induced by using the standard laboratory diet during 10 months, and analyzed with metabolic studies and the immunohistochemistry technique. Four months later, hepatocytes charged with lipid vacuoles were involved in autophagy.

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