bluuebunny/crossref_metadata_2025_split huggingface dataset:
Exploring the half-metallic behavior and spintronic potential of Cr-doped CaTe
Authors: Drissi El Bouzaidi M. , Ahl Laamara R. 
Published: November 2024

The pursuit of miniaturized, high-performance electronic devices has intensified research into novel materials with extraordinary properties. While semiconductors lead the way in optoelectronics and energy harvesting, the burgeoning field of spintronics utilizing electron charge and spin promises revolutionary advances in information processing and storage. A critical component of spintronics is identifying materials with half-metallic behavior, characterized by complete spin polarization at the Fermi level. This study explores chromium (Cr)-doped CaTe as a candidate for half-metallic behavior. Using advanced computational techniques, we investigate the impact of Cr doping on the electronic and magnetic properties of CaTe. Our findings reveal that Cr-doped CaTe exhibits significant crystal field splitting and exchange splitting energies, leading to robust magnetic properties and half-metallic behavior across varying doping concentrations. Notably, the Curie temperature of Cr-doped CaTe exceeds room temperature starting from a 14% Cr concentration, highlighting its practical viability for spintronic applications. The results underscore the potential of Cr-doped CaTe for integration into spintronic devices, offering insights into the electronic structure and magnetic interactions essential for developing next-generation spintronic technologies.
KEY WORDS: Half-metallic behavior, Spintronics, Chromium doping, Curie temperature, Magnetic properties, CaTe (Calcium telluride).
Bull. Chem. Soc. Ethiop. 2025, 39(2), 341-350.
DOI: https://dx.doi.org/10.4314/bcse.v39i2.12
Incorporation of ginger peel polyphenol into yogurt improves its stability: Physicochemical and microbiological characterizations
Authors: A. Almehizia Abdulrahman , A. Al-Omar Mohamed , M. Naglah Ahmed , A. Zen Amer , Abdur Rouf Md. , Husna Nupur Asmaul , Saydar Rahamn Md. , Majid A. Adam Abdel , Anisur Rahman Mazumder Md. 
Published: November 2024

Microencapsulation is a novel process of plant-extracted polyphenol enrichment into yogurt to extend storage stability with improved quality. This study was intended to develop and characterize functional yogurt that had been microencapsulated with ginger-extracted polyphenol to observe stability at refrigeration temperature (4 ± 1 °C). The phenolic content, microencapsulation efficiency, physiochemical properties, texture, microbiological, and sensory properties were evaluated. The microencapsulation efficiency was found to be 94.40 ± 0.05%. In comparison to the dairy yogurt, the polyphenol-enriched yogurt was darker and had a lower a* (redness to greenness) value and a higher b* (yellowness to blueness) value. Yogurt with added polyphenols decreased the rate at which the pH changed. The phenolic yogurt sample outperformed the control yogurt in terms of water-holding capacity and syneresis. The texture of the treated sample was also superior after three weeks of storage compared to the control. In phenolic yogurt, the rate of Lactobacillus viability decline was reduced. Including ginger extract in yogurt reduced the sensory score in color, flavor, taste, and overall acceptability, but the decreasing rate was reduced. This study demonstrates that the ginger extract polyphenol can be effectively microencapsulated to increase yogurt stability under refrigeration.
KEY WORDS: Ginger, Polyphenols¸ Microencapsulation, Yogurt, Shelf life
Bull. Chem. Soc. Ethiop. 2025, 39(2), 201-213.
DOI: https://dx.doi.org/10.4314/bcse.v39i2.2
ДИЭЛЕКТРИЧЕСКИЕ СВОЙСТВА ПРИРОДНЫХ, МОДИФИЦИРОВАННЫХ И ОБЛУЧЕННЫХ ЦЕОЛИТОВ
Authors: Хачатрян Шаен В. 
Published: November 2024

Dielectric permittivity (ε=ε՛–iε՛՛) of the natural, modified and irradiated zeolite is measured depending on frequency of a variable electrical field. It has been carried out that dielectric permittivity and dielectric losses factor of Ba2+ modified zeolite depending on electric field frequency monotonously decreases. With increase of a doze of an irradiation up to 1015 el/cm2 the maximum of dielectric parameter is observed, and at a doze of 3‧1016 el/cm2 this parameter strongly decreases. It is supposed, that such behaviour of tanδ is connected with occurring structural changes in the elementary cell of zeolite at introduction of ions Ba2+ and irradiation.
Anticuerpos antinucleares. Conceptos básicos. Relación con las manifestaciones clínicas
Authors: Label Marcelo , Bendjuia Gabriela , Merenzon Sabrina , Label Andrés 
Published: November 2024

La detección de autoanticuerpos en las enfermedades reumatológicas autoinmunes sistémicas denominadas colagenopatías es de gran valor para apoyar el diagnóstico clínico, y en ocasiones permite detectar y clasificar subtipos. Los actuales trabajos buscan la posibilidad de utilizar biomarcadores de las distintas enfermedades como predictores de la evolución clínica. Por ejemplo, intentan integrar marcadores clásicos de activación, como el componente 3 del complemento (C3) con autoanticuerpos como los anti-dsDNA o los anti-Sm en el lupus eritematoso sistémico. La técnica de inmunofluorescencia indirecta sobre las células HEp-2 es la más utilizada como tamizaje. Detecta la presencia de autoanticuerpos, brinda una idea de su cantidad al titularla y además el patrón en ocasiones permite inferir cuál es el antígeno blanco que luego debe corroborarse con otras técnicas. En esta revisión describimos la nueva taxonomía propuesta por un conjunto de expertos en 2014 y actualizada en septiembre 2021 enfatizando el correlato clínico y la utilidad de los principales anticuerpos anticelulares. El objetivo es comunicar los conceptos actuales con esquemas y tablas que puedan resultar útiles para los profesionales en su práctica.
Cuestiones penales sobre la humanización de la pena
Authors: Muñoz Arango Campo Elías 
Published: November 2024

El Estado tiene la pena como una reacción penal contra el delito, y los fines y la función de la pena han evolucionado reconociendo el principio de humanidad y de dignidad de las personas, por tanto la pena no puede tener un carácter utilitarista y retributivo, sino que de be cumplir fines de prevención general y especial, y más que nada respetar la dignidad del condenado, y para ello las legislaciones como la nuestra se han encargado de consagrar principios, postulados básicos, aunque desde hace mucho tiempo, hay una brecha entre los que dice la ley y la realidad, porque aunque se han establecido algunas políticas, lo cierto es que la grave situación carcelaria es preocupante por el hacinamiento carcelario.
José Luis Romany, in memoriam. La actualidad de una pregunta irredenta
Authors: Rubio Garrido Alberto , Serrano Lanzarote Begoña 
Published: November 2024

Durante cinco años de la década de los 70, José Luis Romany fotografió, dibujó y midió decenas de viviendas vernáculas del entorno de Dénia. El objetivo principal era identificar sistemas constructivos y tipos arquitectónicos propios de la casa popular en esa zona. Sus dibujos y anotaciones fueron tomadas a lápiz a mano alzada durante las visitas en pequeños cuadernos escolares de dibujo. Repasó alguno de estos dibujos a tinta durante sus largas ausencias en Madrid. Tenía en mente realizar un estudio en profundidad, pero este proyecto quedó truncado. Todo ello fue objeto de sendas exposiciones, en 2007 y 2016.
Su reciente fallecimiento nos conmina a recuperar no solo su trabajo. Nos obliga a repensar nuestro lugar respecto de aquel patrimonio al que tanta atención dedicó y del que tan poco queda. Más allá del valor de su testimonio, hoy se impone la pregunta por la relación de nuestro presente con un pasado no tan lejano con el que ya apenas si compartimos nada. ¿Qué hacer con aquella límpida arquitectura vernácula que hoy, frente a la dignidad de una ruina o la humillación de verse transformada en vulgar chaletón, reclama ser partícipe del presente?
José Oubrerie ha dibujado los planos. París 21 mayo 1964
Authors: Oubrerie José , Burriel Bielza Luis 
Published: November 2024

El documento está compuesto de 2 elementos:
José Oubrerie et Luis Burriel. José Oubrerie ha dibujado los planos. París 21 mayo 1964. LC. Revue de recherches sur Le Corbusier Nº 10, 176 - 202.
José Oubrerie. eXeRGue. LC. Revue de recherches sur Le Corbusier Nº 10, 203 - 240.
A SYSTEMATIC REVIEW OF BLOOD LIPID PROFILES IN VIETNAMESE ADULTS FROM 2010 TO 2023
Authors: Le Thi Thao Linh , Nguyen Viet Thanh , Duong Thuy An , Tran Linh Thao , Dang Cong Son , Nguyen Ha Duy , Dang Kim Anh , Nguyen Le Tuan Anh , Le Thi Huong 
Published: November 2024

Background: Dyslipidemia, which is caused by abnormalities blood lipid profiles including increased total cholesterol, triglycerides, LDL-C, and decreased HDL-C, has posed significant health risks including cardiovascular diseases, diabetes mellitus type 2, and other pathologies for people over the world, Vietnam included. The purpose of the systematic review was to focus on the information of blood lipid profiles including the mean value of blood lipid indicators and the prevalence of dyslipidemia among Vietnamese adults in the last 13 years from 2010 to 2023. Method: We explored studies reporting data in adults residing in Vietnam based on key terms such as dyslipidemia, blood lipid, cholesterol, LDL, HDL, triglyceride. The included studies were extracted from Pubmed/ Medline, Web of Science, Embase, CINANL, and 26 websites of medical-related journals in Vietnam. The publication timeframe of included studies ranged between January 01, 2010, to December 31, 2023. The selected studies had an observational study design. Studies that were pulished in languages other than Vietnamese and English were not considered for this systematic review. Findings: 105 articles were included in the systematic review. The mean value of TC, TG, HDL-C, and LDL-C of reported data was ranged from 3.38 to 6.79, 1.06 to 4.96, 0.96 to 1.96, and 2.00 to 4.36 mmol/l, respectively. The mean prevalence of dyslipidemia of included articles was 67.6%. The majority of articles (21/49) reported the prevalence of dyslipidemia as more than 75%. The rates of increased TC, TG, and LDL-C were mainly in the range of 25 to less than 50%, while that of decreased HDL-C was mostly less than 25%. Conclusion: Dyslipidemia is relatively common among adults in Vietnam. It is imperative to prioritize the identification and management of lipid abnormalities in order to prevent potential severe health problems in the future.
From “Can AI think?” to “Can AI help thinking deeper?”: Is use of Chat GPT in higher education a tool of transformation or fraud?
Authors: DİLEKLİ YALÇIN , BOYRAZ SERKAN 
Published: November 2024

This research was conducted to see if using ChatGPT prompts students to think more deeply through reflection reports. The case study method and qualitative research methodology were used to carry out this study. Five graduate students in the Curriculum and Instruction department at Aksaray University's Social Sciences Institute who were teachers in various subjects and employed at various state school levels participated in the study. It was found that the majority of participants accepted all of the information presented by ChatGPT based on a citation as true, did not feel the need to control data reliability, and could be manipulated by ChatGPT while doing self-evaluation. Additionally, despite the fact that they prepared reflective reports in which they compared their essays with ChatGPT and included questions that prompted them to think critically and reflectively, as well as the fact that they had taken a graduate-level course on the teaching of higher order thinking skills, it was acknowledged that they could not demonstrate the expected performance in using higher order thinking skills other than to a limited extent. The onus should be on educators to pioneer positive examples of how to utilize ChatGPT and provide direction on how to harness its potential, supported by critical thinking, rather than to avoid using it and identify it as a tool to be avoided.
Reactive chlorine-, sulfur-, and nitrogen-containing volatile organic compounds impact atmospheric chemistry in the megacity of Delhi during both clean and extremely polluted seasons
Authors: Mishra Sachin , Sinha Vinayak , Hakkim Haseeb , Awasthi Arpit , Ghude Sachin D. , Soni Vijay Kumar , Nigam Narendra , Sinha Baerbel , Rajeevan Madhavan N. 
Published: November 2024

Abstract. Volatile organic compounds (VOCs) significantly impact the atmospheric chemistry of polluted megacities. Delhi is a dynamically changing megacity, and yet our knowledge of its ambient VOC composition and chemistry is limited to few studies conducted mainly in winter before 2020 (all pre-COVID-19). Here, using a new extended volatility range high-mass-resolution (10 000–15 000) proton transfer reaction time-of-flight mass spectrometer, we measured and analysed ambient VOC mass spectra acquired continuously over a 4-month period, covering “clean” monsoon (July–September) and “polluted” post-monsoon seasons, for the year 2022. Out of 1126 peaks, 111 VOC species were identified unambiguously. Averaged total mass concentrations reached ∼ 260 µg m−3 and were > 4 times in the polluted season relative to the cleaner season, as driven by enhanced emissions from biomass burning and reduced atmospheric ventilation (∼ 2). Among 111, 56 were oxygenated, 10 contained nitrogen, 2 chlorine, 1 sulfur, and 42 were pure hydrocarbons. VOC levels during polluted periods were significantly higher than most developed world megacities. Methanethiol, dichlorobenzenes, C6 amides, and C9 organic acids/esters, which have previously never been reported in India, were detected in both the clean and polluted periods. The sources were industrial for methanethiol and dichlorobenzenes, purely photochemical for the C6 amides, and multiphase oxidation and partitioning for C9 organic acids. Aromatic VOC / CO emission ratio analyses indicated additional biomass combustion/industrial sources in the post-monsoon season, along with year-round traffic sources in both seasons. Overall, the unprecedented new information concerning ambient VOC speciation, abundance, variability, and emission characteristics during contrasting seasons significantly advances current atmospheric composition understanding of highly polluted urban atmospheric environments like Delhi.
Mental Health and Psychological Wellbeing of Employees to Manage Post COVID-19 Crisis: Insights from Hospitality Industry
Authors: Bhuiyan Kamrul Hasan , Kowser Ali Mohammad , Santus Kumar Deb  
Published: November 2024

COVID-19 pandemic has driven the world towards socio-economic emergency and psychological distress. This unprecedented but far-reaching consequence has devastated the service sector, particularly the hospitality industry. The purpose of this study was to explore the impact of managing mental health as well as psychological wellbeing of the employees in the hospitality industry to manage the crisis of post COVID-19 in terms of depression, anxiety and stress. This study used quantitative research methods and data were collected from a sample of 253 employees of hospitality industry using a purposing sampling technique. More emphasize were given to Dhaka, Chattagram and Sylhet divisions due to proximity of hospitality properties. The cross-sectional survey form was designed to measure the mental health and psychological wellbeing of employees in the hospitality industry whereas DASS-21 (Depression, Anxiety and Stress Scale) was used as screening instrument. The multinomial logistic regression was used to test the relationship among the variables. The results of the study show that 52% of the respondents are suffering from moderate to severe level of depression, 66% of the respondents are suffering from moderate to extremely severe level of anxiety but almost 90% of the respondents are not stressed or have mild stress symptoms. In addition, likelihood test results of DASS-21 shows that pandemic had a significant negative impact on initiative to work, panic, and agitated for the employees of hospitality industry, which still have a dominance. The findings of this study will assist the researchers, top management; and government to understand mental health and psychology of employees.
The Petrogenesis of the Lower Critical Zone and Lower Group Chromitites, Eastern Bushveld Complex: Incremental Development of Igneous Layering and Injection of Chromite Slurries
Authors: Scoon Roger N. , Mark Bristow D. , Reichhardt Friedrich Johannes , Mitchell Andrew A. 
Published: November 2024

Abstract
The petrogenesis of the mafic-ultramafic layered rocks of the Bushveld Complex, South Africa, remains uncertain despite more than a century of intensive research. There is little evidence for the existence of a shallow crustal magma chamber, a principle entrenched in the scientific literature for many years, and we prefer an alternative hypothesis in which igneous layering developed from successive intrusive events. Geochemical discontinuities are explained by radical switches in the composition of intruding parental magmas. Here we investigate the origin of the Lower Critical zone, a sequence of five pyroxenitic and two peridotitic units containing the Lower Group (LG) of chromitites, of which LG6 is a major resource for chromium ore in the eastern limb. The pyroxenitic and peridotitic units are not part of magmatic cycles. Two discrete lineages of parental magma are recognized: a pyroxenitic magma sourced from deep crustal staging chambers, and a mantle-derived peridotitic magma. The pyroxenitic units reveal an absence of modal layering (with the exception of the 0.1- to 1-m-thick layers of chromitite) and limited height-related fractionation trends (enstatite: En86–811). Magma was fed as thin laminae. Intrusion rates were insufficient to create a magma reservoir because the supply of magma matched the rate of batch crystallization. There is little evidence of a fractionated residue having been removed. The recognition of minor geochemical trends of Mg- and Fe-enrichment in the pyroxenitic units reflects minor oscillations in the composition of the parental magma. The composition of the orthopyroxene and of the Cr spinel was primarily established at depth. The anomalous concentrations of chromite are explained by the introduction of pyroxenitic magmas containing crystals of Cr spinel, sufficiently abundant in some cases as to have created crystal slurries. The Cr spinel was entrained at depth, in the staging chambers. Each layer of chromitite is related to injection of a crystal slurry. The tiny size of the rounded xenocrysts of Cr spinel facilitated the mobile and dynamic nature of slurries. Coarse-grained mosaics of Cr spinel developed in the compacted layers of chromitite from prolonged periods of annealing. The irregular spacing of the chromitites, and occurrence of variable concentrations of disseminated Cr spinel in the pyroxenites, is explained by fluctuations in the proportion of entrained xenocrysts, rather than changes in the composition of the melt fraction of the magma. The peridotitic units are interpreted as sills, the chromitite layers having been inherited from the earlier formed pyroxenitic stratigraphy. The most primitive layers of dunite and harzburgite (olivine: Fo90-85 in which Fo = forsterite) accumulated in the center of sills, where a high magma flux facilitated growth of pegmatitic oikocrysts.
Alteration, Gold Deportment, Quartz Textures, and Fluid Characteristics in the Red Dot Deposit at Marigold Mine, Nevada
Authors: Huff Dante , Fithian Matthew T. , Fulton Anne , Holley Elizabeth A. 
Published: November 2024

Abstract
The Battle Mountain mining district in north-central Nevada hosts a variety of magmatic-hydrothermal ore deposits, as well as sedimentary rock-hosted Au deposits that lack a conclusive relationship to magmatism. Mining of the sedimentary rock-hosted deposits has been primarily limited to oxidized zones, so there is little information available about the hypogene sulfide characteristics and mineralizing processes. Marigold mine is located in the northern Battle Mountain mining district and comprises multiple deposits, including the Red Dot deposit. The Red Dot deposit includes a mineralized sulfide zone recently intersected by deep drill holes, which provides an opportunity to examine hypogene mineralization styles and relationships.
At Red Dot, early-stage pre-ore pyrite is enriched in Hg and Ni but contains less As than ore-stage pyrite and little to no Ag or Au. Ore-stage quartz lacks fluid inclusions but produces a yellow cathodoluminescence response typical of low-temperature hydrothermal environments. Ore-stage pyrite occurs as arsenian pyrite rims enriched in Au, As, Ag, Cu, and Sb that overgrow pre-ore pyrite; these rims have δ34S stable isotope values consistent with porphyry pyrite elsewhere in the district. Alteration styles include decarbonization, carbonation, sericitization, silicification, sulfide precipitation, and oxidation. The absence of zonation in the alteration styles suggests Red Dot is distal to any causative porphyry stock. District aeromagnetic data indicate an absence of any buried igneous bodies beneath Marigold, providing additional evidence that Red Dot is distal to any magmatic-hydrothermal fluid source.
Red Dot is ideally situated along a complex structural network capable of focusing fluids from laterally distant sources into the host rocks repeatedly through time. Cretaceous magmatic-hydrothermal fluids related to the emplacement of the Trenton Canyon Stock or local quartz monzonite dikes at Marigold mine may have caused the early-stage alteration and sulfide mineralization at Red Dot. The early-stage alteration and sulfide mineralization could also be attributed to the emplacement of felsic dikes at the Lone Tree and Trenton Canyon Au deposits during the Eocene. Apatite and zircon (U-Th)/He data support an Eocene formation age for ore-stage quartz and pyrite.
The alteration styles, ore-stage sulfide textures, geochemical signature, base metal and Au mineralization, and distal nature of Red Dot most closely resemble the Cove deposit, 25 km to the south. At Cove, overprinting polymetallic and Carlin-like Au mineralization are genetically related to Eocene magmatic-hydrothermal fluids. We suggest that Red Dot represents a similar expression of magmatic-hydrothermal mineralization, but at a greater distance from the causative intrusion and in different host rocks that underwent ideal preparation for interaction with mineralizing fluids.