Lymphoepithelioma-like carcinoma of the breast: a case report and review of the literature

Lymphoepithelioma-like carcinoma of the breast is uncommon with only 21 patients documented in the literature. It can wrongly be diagnosed as medullary carcinoma and certain types of lymphoma due to undifferentiated proliferation of malignant epithelial cells with prominent lymphoid infiltration. In this paper, we present a case of LELC of the breast in a 64-year-old female with breast LELC and a discussion based on a review of the literature

Physicochemical characterization and antioxidant properties of essential oils of M. pulegium (L.), M. suaveolens (Ehrh.) and M. spicata (L.) from Moroccan Middle-Atlas

The cosmetics and food fields are based on the use of synthetic substances to protect their products against oxidation. However, synthetic antioxidants were reported to have negative effects on human health. The interest to develop natural antioxidants from plants has been growing in recent decades. The aim of this study was to determine the antioxidant properties of three essential oils (EOs) of M. pulegium (L.), M. suaveolens (Ehrh.) and M. spicata (L.) from the Azrou and Ifrane regions. The organoleptic characteristics, yields and physical properties were determined for the selected EOs. Their chemical compositions were identified using GC-MS; then, their antioxidant activities were evaluated using the DPPH• free radical scavenging activity and were compared with the ascorbic acid standard. The determined physicochemical parameters of dry matter and EOs demonstrated their good quality. The analysis of the EOs showed the dominance of pulegone (68.86–70.92%) and piperitenone (24.81%), piperitenone oxide (74.69–60.3%), and carvone (71.56–54.79%) and limonene (10.5–9.69%) for M. pulegium, M. suaveolens and M. spicata, respectively, from Azrou and Ifrane. Additionally, the antiradical tests demonstrated the remarkable power of these EOs, especially M. pulegium EO (IC50 = 15.93 mg/mL), which recorded the best activity compared with ascorbic acid (IC50 = 8.849 mg/mL). The obtained results indicated that these EOs could be applied as natural antioxidants in the food industry.Axencia Galega de Innovación | Ref. IN607A2019/0

STUDIES OF DIELECTRIC RELAXATION AND AC CONDUCTIVITY BEHAVIOR IN LAMELLAR DOUBLE HYDROXIDE

The frequency dependent dielectric and conductivity behavior of a Zn-Al layered double hydroxides (LDH), with Cl– interlayer anion and with Zn/Al ratio R=2, have been studied. The formation of layered double hydroxides (LDH) and changes in the structural properties were investigated by x-ray diffraction (XRD), FTIR and ICP. Electric and dielectric properties were studied over a frequency range of [200Hz–1MHz] and in the temperature from 300K to 375K. These Studies show that the relaxation contribution is superimposed by electrode polarization effect. The appearance of peak for each temperature in the imaginary part of permittivity and modulus suggests the presence of relaxing dipoles in the layered double hydroxides.  On increase of temperature, the peak shifts towards higher frequency side suggesting the speed up the relaxation time. The variation of ac conductivity with frequency obeys Jonscher power law except a small deviation in the low frequency region due to electrode polarization effect. The dc conductivity increases with increase in temperature. The temperature dependence of the relaxation times for all samples showed Arrhenius behavior, from which the activation energy was derived

Effect of heat treatment on the photocatalytic activity of alpha-Fe2O3 nanoparticles: towards diclofenac elimination

alpha-Fe2O3 nanoparticles were synthesized via a straightforward method. XRD, FTIR, SEM, ESR, and DRS techniques investigated the influence of various calcination temperatures on the crystal structure, optical, and photocatalytic properties of the samples. The obtained results demonstrated that the average crystallite size increased with the increase in the calcination temperature. Measured and computed optical properties were in accordance and the bandgap energy decreased with the increase in the calcination temperature. The highest photocatalytic degradation efficiency for diclofenac (DCF) was obtained with the sample calcinated at 300 degrees C (96%). The photocatalytic process occurs because of the presence of OH center dot radicals. The addition of H2O2 led to the inhibition of OH center dot radicals that H2O2 scavenged

Synthèse bibliographique : étude des propriétés physico-chimiques du phosphogypse Marocain

La production de l’acide phosphorique au monde engendre l’accumulation d’une grande quantité d’un sous-produit acide appelé phosphogypse (PG). La grande partie de ce PG est rejetée sans aucun traitement dans l’environnement, ce qui forme une source significative de contamination à longue durée. Le PG Marocain est principalement formé par le sulfate de calcium, à côté de diverses impuretés telles que les phosphates, les fluorures, les matières organiques, les métaux lourds et les éléments radioactifs. Cet article détaille en particulier les différentes propriétés physico-chimiques du PG Marocain. La compréhension de ces propriétés permet en générale d’identifier les différents agents de contamination de l’environnement contenus dans ce résidu. De plus, les facteurs affectant la présence des différentes sortes d’impuretés dans le PG sont aussi discutés

Dielectric Properties, AC Conductivity, and Electric Modulus Analysis of Bulk Ethylcarbazole-Terphenyl

Electrical and dielectric properties for bulk ethylcarbazole-terphenyl (PEcbz-Ter) have been studied over frequency range 1 kHz–2 MHz and temperature range (R.T –120°C). The copolymer PEcbz-Ter was characterised by using X-ray diffraction. The frequency dependence of the dielectric constant (εr′) and dielectric loss (εr″) has been investigated using the complex permittivity. εr′ of the copolymer decreases with increasing frequency and increases with temperature. AC conductivity (σac) data were analysed by the universal power law. The behaviour of σac increases with increasing temperature and frequency. The change of the frequency exponent (s) with temperature was analysed in terms of different conduction mechanisms, and it was found that the correlated barrier-hopping model is the predominant conduction mechanism. The electric modulus was used to analyze the relaxation phenomenon in the material

Moroccan phosphate-based cathode materials: A sustainable solution for high energy Na-ion batteries and a cleaner future

Sodium-ion batteries (SIBs) are gaining increasing attention as a promising alternative to lithium-ion batteries (LIBs) for grid-scale energy storage applications. This is due to the abundance and low cost of sodium resources. Among the key components of SIBs, cathode materials play a critical role in determining performance and overall cost. Phosphate framework materials have become an attractive option for electrode materials in SIBs due to their high structural stability, facile reaction mechanism, and rich structural diversity. In this review, we discuss recent advances in the exploration of phosphate framework materials, including fluorophosphates, pyrophosphates, and carbonphosphates. Additionally, we highlight the relationship between the materials' structure, composition, and performance. Furthermore, we examine Morocco's potential to leverage its rich phosphate resources for the development of a sustainable and economically viable energy storage industry. As one of the world's largest producers and exporters of phosphate, the research and development of sodium ion phosphate batteries in Morocco has the potential to promote the growth of the renewable energy sector and reduce dependence on fossil fuels

The Study of Peri-Urban Soil Contamination in the Kenitra Region, Morocco – Characterization and Assessment Using a Statistical Approach

The peri-urban solid waste in the Kenitra region is experiencing a significant change in terms of quantity and quality. High concentrations of both inorganic and organic materials are present in these wastes, posing a significant threat of pollution. This research seeks to analyze the extent of soil contamination by heavy metals, providing valuable insights to prompt proactive interventions and propose alternative solutions for sustainable waste management. The objective of this work is to study peri-urban soil contamination in the Kenitra region-Morocco. For that several soil contamination indicators have been analyzed, namely: nitrogenous, fertilizer and heavy metals concentration, soil pH, ... Etc. The analyzed soil samples were taken of water from the different points at the levels of the studied region. The analysis shows that the studied soils are polluted with Zn, Mg, Cu, Ni, Cr, Cd, Pb, and other chemical elements. The results obtained suggest a correlation between soil pollution and the concentrations of the measured heavy metals. Furthermore, the analysis shows that heavy metals, contamination is particularly related to the presence of lead, cadmium, and zinc. The zinc contamination in the soil is about 390 mg/kg for a standard of between 0.2 and 2 mg/kg. Lead concentrations are 53 mg/kg for a standard of 0.3 mg/kg. Based on Moroccan standards the soil is contaminated by lead, cadmium, and zinc