Broad antibacterial spectrum of endophytic fungi isolated from halophyte Suaeda fruticosa in Algeria

The purpose of this work was to isolate and evaluate the antimicrobial potential of endophytic fungi isolated from Suaeda fruticosa. Endophytic isolates were identified at the genus level. The genera Fusarium (33.33%), Phoma (26.67%), Penicillium (13.33%), and Aspergillus (13.33%) were more prevalent, while Trichoderma genus (6.67%) was less common. The isolated fungal endophytes were screened for their potential antifungal and antibacterial activities. Most isolates showed different levels of inhibitory activity against at least one of the pathogens. The best inhibition percentages were those obtained by Penicillium sp. 1; 74, 71, 65, and 47% against Fusarium oxysporum f.sp. albedinis, Fusarium oxysporum f.p. ciccri, Fusarium solani var. coeruleum and Phytophthora infestans respectively. Regarding antibacterial activity, the zones of inhibition ranged from 0 to 25.5 mm. Fusarium isolates and Phoma sp. 4 showed the greatest antibacterial activity, the highest activity was observed with Fusarium sp.5 and Fusarium sp. 1, which gave zones of inhibition of 25.5 and 22.5 mm respectively against B. cereus ATCC 10876. Gram-positive bacteria were more sensitive to endophyte isolates than Gram-negative bacteria. From the results of the present work, it is possible to conclude that endophytic fungi isolated from Suaeda fruticosa could be a promising source of bioactive compounds and deserve further study. DOI: http://dx.doi.org/10.5281/zenodo.702827

Antimicrobial activity of endophytic fungi associated with halophytic species Salsola vermiculata

Endophytic fungi are known for their production of bioactive compounds with antibacterial and antifungal activity. In this study, an evaluation of the antibacterial and antifungal activity of endophytic fungi isolated from Salsola vermiculata, a halophyte species collected from Chott el Hodna, M'sila (Algeria) was carried out. The eleven isolated endophytic fungi were identified as belonging to the genera Alternaria sp., Aureobasidium sp., Phoma sp., Chrysosporium sp., Fusarium sp., Aspergillus sp., Papulaspora sp., Ulocladium sp., Humicola sp. and Pencillium sp. The antimicrobial activity of endophyte isolates was tested against phytopathogenic fungi and pathogenic bacteria using the dual culture and the agar plug diffusion methods respectively. The higher percentage inhibition of 79% was obtained by the isolate Penicillium sp. 1 against Fusarium oxysporum f.sp. ciccri. All isolated endophytic fungi showed antibacterial activity against at least one pathogenic bacterium, the greatest effect was obtained by Fusarium sp. against Pseudomonas aeruginosa ATCC 27853 and Bacillus cereus ATCC 10876 with inhibition zones of 26.33 and 25.33 mm respectively. After the comparison of the means of the zones of inhibition, the isolate Chrysosporium sp. was the most active against all pathogenic bacteria with average inhibition zones of 20.55 mm. DOI: http://dx.doi.org/10.5281/zenodo.703603

Simplified numerical approach for incremental sheet metal forming process

The current work presents a finite element approach for numerical simulation of the incremental sheet metal forming (ISF) process, called here ‘‘ISF-SAM’’ (for ISF-Simplified Analysis Modelling). The main goal of the study is to develop a simplified FE model sufficiently accurate to simulate the ISF process and quite efficient in terms of CPU time. Some assumptions have been adopted regarding the constitutive strains/stresses equations and the tool/sheet contact conditions. A simplified contact procedure was proposed to predict nodes in contact with the tool and to estimate their imposed displacements. A Discrete Kirchhoff Triangle shell element called DKT12, taking into account membrane and bending effects, has been used to mesh the sheet. An elasto-plastic constitutive model with isotropic hardening behaviour and a static scheme have been adopted to solve the nonlinear equilibrium equations. Satisfactory results have been obtained on two applications and a good correlation has been shown compared to experimental and numerical results, and at the same time a reduction of CPU time more than 60% has been observed. The bending phenomenon studied through the second application and the obtained results show the reliability of the DKT12 element

Extraction of Urban Areas Using Spectral Indices Combination and Google Earth Engine in Algerian Highlands (Case Study: Cities of Djelfa, Messaad, Ain Oussera)

The fundamental difficulty in mapping urban areas, especially in semi-arid and arid environments, is the separation of built-up areas from bare lands, owing to their similar spectral characteristics. Accordingly, this study aims to identify the suitable spectral index that can provide high differentiation, between urban areas and bare lands, in semi-arid areas of three cities of the province of Djelfa, namely, Djelfa, Messaad, and Ain Oussera (Algerian central highlands), through a selection of four spectral indices including Urban Index (BUI), Band ratio for built-up area (BRBA), Normalized Difference Tillage Index (NDTI) and Dry Bare-soil Index (DBSI). In order to increase the mapping accuracy of the built-up in studied areas, a multi-index approach has been applied focusing on identifying an adequate combination of spectral indices of remote sensing that provides the highest performance compared to the images of sentinel 2A. The multi-index approach was developed using three spectral indices combinations and was created using a layer stack process. For forming bare land layer stacking data, both NDTI and DBSI indices were used, while the built-up area layer stacking data was made with both BUI and BRBA indices. The main process was carried out on the Cloud Computing Platform based on geospatial data of Google Earth Engine (GEE) and using machine learning classification by the Support Vector Machine (SVM) algorithm, based on imagery from sentinel 2A acquired during the dry season. The results indicated that the thresholds of the built-up areas are difficult to delineate and distinguish from bare land efficiently with a single index. The obtained results also revealed that the use of multi-index including BUI index provided the best results as they showed the highest effects with NDTI index and DBSI index compared to BRBA index, where the overall accuracies of the multi-index (DBSI/ NDTI/ BUI) were 98.7% in Djelfa, 96.5% in Messaad, and 97.87 % in Ain Oussera, and the kappa coefficients were 97.3%, 85.4%, and 95.3% respectively. These results show that this multi-index is effective and reliable and can be considered for use in other areas with similar characteristics.

Sintering Behavior of CNT Reinforced Al6061 and Al2124 Nanocomposites

Ball milling and spark plasma sintering were successfully used to produce carbon nanotube reinforced Al6061 and Al2124 nanocomposites which have potential applications in the fields of aerospace, automotive, electronics, and high precision instrumentation. Al2124 and Al6061 nanocomposite powders containing 0.5 to 2 wt.% CNTs prepared through sonication and wet ball milling were spark plasma sintered at 400, 450, and 500°C for 20 minutes under a pressure of 35 MPa. CNTs were better dispersed, and less agglomerated and had good adhesion to the matrix in composites containing 1 wt.% CNTs. The increase of CNT content to 2 wt.% led to the formation of CNT clusters which resulted in less uniform and homogenous composite powders. Almost full densification of Al6061 reinforced with CNTs was achieved at 500°C. Also, CNTs reinforced Al2124 nanocomposites reached very high densities at 500°C. Composites reinforced with 1 wt.% CNTs displayed better densification compared to composites containing 2 wt.% CNTs. The increase of CNTs content from 0.5 to 1 wt.% increased the hardness of the Al6061 and Al2124 alloys to maximum values. Further increase of CNTs content to 2 wt.% decreased the hardness to values lower than that of the monolithic alloys

The problematic linguistics in building second generation curricula \u27linguistic approach in the curriculum of the fourth year of primary education\u27

The research is an applied linguistic approach, based on the content analysis method .Its topic is how to deal with the problematic linguistics, and its manifestations in the curricula of the second generation in Algeria, taking the Arabic language curriculum for the fourth year of primary school-as it is the last school year that has been reformed (2018) -as a sample for study and analysis .In this study, we will focus on the procedural handling of the curricula in the following points: its dealing with linguistic activities, its view of the functional roles that the Arabic language can advance in, the targeted linguistic fields, and how the contents are distributed. All of these points are considered as a test of the usefulness of the cognitive and methodological arguments on which the curriculum is based

A Comparative Mixed-Methods Study of Algerian University Students’ Interaction with Fiction Works and their Movie Adaptations through Reading and Watching

Abstract: This research delves into the engagement of Algerian university students with literary works and their corresponding film adaptations. Focusing on 1st-year English department students at Mostafa Benboulaid University, Algeria, a comparative mixed-methods approach is employed to study preferences, cross-cultural understanding, and motivations. Five literary works Khaled Hosseini's The Kite Runner, Suzanne Collins' The Hunger Games, Paulo Coelho's The Alchemist, Stieg Larsson's The Girl with the Dragon Tattoo, and Antoine de Saint-Exupéry's The Little Prince and their movie adaptations form the basis of this investigation. Data was collected from surveys distributed to 200 university students, along with additional inputs from interviews, creative writing samples, and tests across four student cohorts. Results highlight the enhancement in self-expression, identity exploration, and social communication, comparing students' comprehension, interpretation, evaluation, and enjoyment across both mediums. The findings underscore the potential benefits of leveraging movie adaptations as educational tools, with particular relevance during crises, such as the pandemic. Keywords: Literary works and film adaptations, Algerian university students, mixed-methods analysis, reading and viewing, cross-cultural understanding

Desarrollo de un entorno multilingüe para la plataforma wifitickets

La plataforma wifitickets ofrece acceso condicional a Internet, al estilo de un tarificador clásico. Se pretende dotar a la plataforma diseñarla en la nueva tecnología, es decir HTML5 usando estilos CSS3, Javascript, Jquery en lo cúal de integrar en la página animaciones, en su vez hemos usado esta tecnología para que se viera en los dispositivos tanto móviles como tabletsEscuela Técnica Superior de Ingeniería de TelecomunicaciónUniversidad Politécnica de Cartagen

Genetic adaptability of durum wheat to salinity level at germination stage

Faculty of Sciences, University of Tunis El Manar, Tunis from April to May 2010 to improve salt tolerance during germination stage. For this purpose, two crosses and their progenies (F1, F2, BC1Ps and BC1Pr) were used based on shoot length at different salinity levels (0, 50, 75, 100, 150 and 200 mmol/L). Significant differences for salt tolerance between means of generations were observed in all the treatments. Separate generation means analysis indicated that inheritance of resistance to salt at germination stage was dependent upon the level of salinity. With low salinity level (50 and 75 mmol/L), only additive and dominance effects were implicated in the genetic control of this trait. For moderate salinity level (100 and 150 mmol/L) in the two crosses, genetic interactions were solicited and the digenic epistatic model was sufficient to explain variation in generation means. However, for the 200 mmol/L treatment, none of these models explained the variations in generation means and probably, higher order interactions or genes linkage were solicited. The estimated values of narrow-sense heritability were dependent on the cross and the salinity level and ranged between 29 and 90%. The results of this study indicated that selection in specific environments is useful for enhancing resistance to salt, but it may not be effective in providing resistance across a wide range of environments.Keys words: Durum wheat, genetic-adaptability, salinity level

Epistemological Linguistics in the Arabic Linguistics between Methodological Presence and Contextualized Grounding

تحاول هذه الدراسة عرض حال التلقي العربي للسانيات العرفانيّة، من خلال التنظير لأهم المفاهيم والمرتكزات التي قام عليها هذا الأنموذج اللساني الذي يمثل حقلا معرفيا جديدا ظهر في الغرب، وأصبح يوما بعد يوم يعرف انتشارا واسعا. فالعرفانيّة انفردت بخصوصية الجمع بين اللغة والمعرفة، كما أنها تهتم بوصف القدرات المعرفية للمتكلمين، وتركز على كل ما يقع في ذهن المتكلم عندما يتواصل باللغة، وهي بذلك تتجاوز البنية الشكلية للغة لتخترق أعماق صورها الإدراكيّة. فهل اطلع اللغويّون العرب على هذا المنجز؟ وهل أحاط أسلافنا بها خبرا في كتاباتهم؟ وبناء على هذا، تتوخى دراستنا استعراض: مفهوم اللسانيات العرفانيّة، وظروف نشأتها، والبحث عن جذورها في التراث العربي الإسلامي، هادفة إلى تسليط الضوء على مدى تفاعل هذه الدراسة اللسانية المعاصرة مع البحث اللغوي العربيThis study attempts to present the status of Arab reception of Epistemological Linguistics by theorizing the most important concepts and foundations upon which this linguistic model is based. This model represents a new field of knowledge that emerged in the West and has gained widespread popularity over time. Epistemological Linguistics stands out for its unique fusion of language and knowledge. It is concerned with describing the cognitive abilities of speakers and focuses on everything that occurs in the mind of a speaker during language communication, going beyond the formal structure of language to penetrate the depths of its cognitive images. Have contemporary Arab linguists been acquainted with this achievement? Did our ancestors have knowledge of it in their writings? Based on this, our study aims to review the concept of Epistemological Linguistics, the circumstances of its emergence, and the search for its roots in Arab-Islamic heritage. The objective is to shed light on the extent of interaction between this contemporary linguistic study and Arabic linguistic research