jablonkagroup/rise_ai_scientists huggingface dataset:
Source:  (article, 2025-06-28)
Field: Chemistry — Analytical Chemistry

SMARTPHONES AS ANALYTICAL TOOLS TO STUDY THE PHOTODEGRADATION OF FOOD DYES IN A LABORATORY SETTING The use of smartphones as analytical tools represents an innovative approach that expands the possibilities for measurement in the field of chemistry.Thanks to their high-resolution cameras and advanced sensors, these devices can perform functions similar to those of traditional equipment such as UV-Vis spectrophotometers.Furthermore, their portability, low cost, and ease of use make them an attractive alternative, allowing students to interact with emerging technologies and promoting hands-on learning while reducing dependence on expensive equipment.In this study, a method has been developed for students of the course "Advanced Sample Preparation Methods.Sustainability in the Laboratory," of the Master's program in Experimental Techniques in Chemistry at the University of Valencia.The activity has as its main objective to introduce the smartphone as an analytical tool to study and optimize, in a collaborative way, the photodegradation conditions of persistent organic pollutants in a continuous system.To this end, synthetic food dyes are used as models of contaminants and a photodegradation system based on a suspension of titanium dioxide (TiO) activated with ultraviolet light has been designed.The methodological approach of the practice allows students to reinforce and apply their knowledge in a real environment, learning to assemble and operate a continuous photodegradation system, analyse the efficiency of the process and compare analytical techniques such as UV-Vis spectrophotometry and colorimetric analysis with smartphones.In addition, the structure of the practice encourages collaborative work and critical evaluation of the results, promoting comprehensive training in sustainable chemical analysis techniques. Photodegradation ; Computer science ; Multimedia ; Chemistry ; Photocatalysis Dye analysis and toxicity ; Biosensors and Analytical Detection ; Advanced Chemical Sensor Technologies
Authors: Ayat Ahmed shukran | Leqaa Hussein Kadhim
Source: Journal of Kufa for Chemical Sciences (article, 2025-12-19)
Field: Chemistry — Physical and Theoretical Chemistry

A Theoretical Study of Chemical Reactivity of Mefenamic acid Through DFT Reactivity Descriptors Using density functional theory (DFT), the geometry optimized has been studied at ground state, B3LYP, and 6-311G basis sets. The identification of donor sites is aided by theoretical features such as shape and the HOMO-LUMO gap detected by DFT simulations. Mefenamic acid's global reactivity properties at the B3LYP/6-311G level have been calculated in Global softness (S), global hardness (η), global affinity (A), ionization potential (I), electro negativity (χ), chemical potential (μ), global electrophilicity index (ω), and global softness (S) are some of the descriptors of global reactivity. Reactivity (psychology) ; Density functional theory ; Mefenamic acid ; Electrophile ; Ionization ; Basis (linear algebra) Crystallography and molecular interactions ; Advanced Chemical Physics Studies ; Protein Structure and Dynamics
Authors: B. Folkers | Carolien Castenmiller | Alexander Brinkman | Kirsten Stadermann
Source: Research Square (preprint, 2025-12-01)
Field: Chemistry — Physical and Theoretical Chemistry

The Role of Demonstration Materials in Quantum Education: Content, Trends and Gaps in Scientific Research Quality (philosophy) ; Focus (optics) ; Range (aeronautics) ; Quantum ; Educational research Various Chemistry Research Topics ; Science Education and Pedagogy ; Nanotechnology research and applications
Authors: Andreas J. Bornschlegl | Attila J. Mozer | Jessie A. Posar | Jianchang Wu | Juan S. Rocha‐Ortiz | Patrick Duchstein | M. Reina | Alejandro Ortíz | Braulio Insuasty | Dirk Zahn | Justin Davies | Marco Petasecca | Larry Lüer | Christoph J. Brabec
Source: Energy & Environmental Science (article, 2025-11-28)
Field: Materials Science — Polymers and Plastics

Uncovering gamma-stable organic semiconductors: large-scale screening and predictive modelling for radiation-hard applications Inert gamma degradation of 46 organic hole transport materials reveal a high average ionizing dose tolerance of more than 10 kGy, with BODIPY molecules exceeding 100 kGy. Organic molecules ; Degradation (telecommunications) ; Organic chemicals ; Ionizing radiation Polymer Nanocomposite Synthesis and Irradiation ; Organic Electronics and Photovoltaics ; Radiation Effects in Electronics
Authors: Arzu Pashayeva | Khalil Nagiyev | M Debora | S ; Inna | B Ron | S Avargil | O Herscovitz | Y Dori | D Marchak | I Shvarts-Serebro | R Blonder | A Johnstone | G Thomas | J Clark | A Paivio | H Wu | P Shah | S Watson | R Watson | J Wilcox | P Pollet | S Freeman | S Eddy | P Blessinger | J Carfora | A Lawson | M Abraham
Source: BSU- Journal of Chemistry and Material Sciences (article, 2025-01-01)
Field: Chemistry — Physical and Theoretical Chemistry

INTEGRATIVE APPROACHES CHARACTERIZINGNEW INSTRUCTIONAL METHODS IN THETEACHING OF CHEMISTRY This article provides an extensive analysis of the significance and application prospects of integrative approaches characterizing new instructional methods in chemistry education.It explains that in the modern education system, the implementation of innovative teaching methods, particularly integrative approaches, plays a crucial role in facilitating interdisciplinary integration and allowing students to comprehend topics in a broader and deeper context.The article explores how these approaches in chemistry teaching effectively enhance students' theoretical and practical knowledge.The focus is on contemporary teaching methods such as Problem-Based Learning (PBL), Project-Based Learning (PjBL), cooperative learning, the use of digital technologies, and practical laboratory work.These methods have significant potential to develop students' critical and analytical thinking skills, making learning more engaging and meaningful by confronting them with real-life problems.The ability of teachers to implement these new methods and their role in the teaching process is a central theme of the article.Additionally, the use of digital resources in the teaching process, the adaptation of teaching materials to the integrative approach, and the development of infrastructure are thoroughly discussed.The challenges encountered in applying integrative teaching approaches and ways to overcome them are also analyzed.The article also presents examples of new teaching methods successfully implemented in various parts of the world.The article concludes that integrative approaches in chemistry education make a significant contribution to the learning process and are vital tools for improving the quality of education.The widespread application of these approaches is important for enriching students' learning experiences and fostering the development of scientific thinking. Mathematics education ; Computer science ; Chemistry ; Management science ; Psychology ; Engineering Various Chemistry Research Topics ; Science Education and Pedagogy ; Innovative Teaching Methods
Authors: Kurniati Abidin | Jasruddin Daud Malago | Fatimah A. Noor | Toto Winata
Source: Jurnal Neutrino Jurnal Fisika dan Aplikasinya (article, 2025-10-30)
Field: Materials Science — Materials Chemistry

EXPLORING RAMAN SPECTROSCOPY OF CNTs: INFLUENCE OF HOTWIRE TEMPERATURES ON RBM, D AND G BANDS USING HWC-VHF-PCVD Carbon Nanotubes (CNTs) are nanostructured materials that offer mechanical, electrical, and thermal advantages, making them attractive for various technological applications. In this study, CNTs were synthesized using the Hot Wire Cell-Very High Frequency-Plasma Enhanced Chemical Vapor Deposition (HWC-VHF-PECVD) with hotwire temperature variation (225 °C, 275 °C, and 325 °C) as the main variable. Characterization of CNTs was conducted through Raman spectroscopy to evaluate the effect of hotwire temperature variation on the structure and quality of CNTs. The Raman test identified a characteristic RBM (Radial Breathing Mode) band around 100-300 cm⁻¹, a D-band around 1350 cm⁻¹ associated with structural defects, a G-band around 1580 cm⁻¹ indicating sp² carbon bonds, and a 2D-band around 2650-2700 cm⁻¹ associated with the graphitic layer stack. The quantitative analysis of Raman spectra showed ID/IG ratios of 0.94, 0.76, and 0.86 for CNTs synthesized at 225°C, 275°C, and 325°C, respectively, confirming that CNTs grown at 275°C exhibit the lowest structural disorder and highest graphitic crystallinity. The results show that the intensity of the G-band at 275°C hotwire temperature is higher than that at 225°C and 325°C, indicating better CNTs quality at this temperature. In addition, the Raman shift in the RBM-band for 275°Chotwire temperature is higher compared to 225°C and 325°C, indicating a variation in the diameter of the synthesized CNTs. This characterization reveals that the control of hotwire temperature greatly affects the structure and quality of CNTs, which is important for the optimization of the synthesis process and its application in the future. Raman spectroscopy ; Characterization (materials science) ; Carbon nanotube ; Analytical Chemistry (journal) ; Chemical vapor deposition ; Intensity (physics) ; Deposition (geology) Carbon Nanotubes in Composites ; Graphene research and applications ; Boron and Carbon Nanomaterials Research
Authors: Дмитро Бреславський | Павло Паламарчук | Олег Костянтинович Морачковський
Source: Scientific periodicals of Ukraine (article, 2025-12-29)
Field: Materials Science — Materials Chemistry

ПОВЗУЧІСТЬ ТА ПОШКОДЖУВАНІСТЬ ОБОЛОНКИ ТВЕЛУ ПРИ СТАТИЧНОМУ ТА ЦИКЛІЧНОМУ НАВАНТАЖЕННІ The paper presents an approach to solving the problem of creep of the nuclear reactor fuel rod cladding under the conditions of its contact interaction with the fixing element using a specially developed user subroutine for the finite element analysis software. The cases of time-invariant and cyclic loading, which is caused by the action of the flow washing the fuel, are considered. The problem is solved on the basis of a full three-dimensional formulation, materials with isotropy of creep-damage properties are considered. In the case of analysis of cyclic deformation with accumulation of hidden damage, amplitude contact stresses and stresses arising during forced oscillations of the fuel rod are taken into account. To take into account the processes of accumulation of hidden damage due to creep, a specially developed subroutine is used to add to the calculation scheme the function of integration in time of the evolution equation for the scalar damage parameter. In this subroutine, in the case of taking into account the cyclic loading, a transition to the equivalent creep problem is also performed, obtained by using the method of two time scales and averaging over the period, the stress cycle asymmetry functions are determined for each integration point of the finite element model. The results of numerical simulation of the creep of the fuel cladding when it is in contact with the fixing element for the case of static and dynamic creep are obtained. The cladding material is zirconium alloy. In the case of taking into account cyclic loading, a significant acceleration of creep processes and accumulation of hidden damage and a reduction in the time to the occurrence of a macroscopic defect are demonstrated. The place of its occurrence is determined, which corresponds to the inner surface of the fuel cladding opposite the location of the fixing element. Finite element method ; Creep ; Subroutine ; Cladding (metalworking) ; Plasticity ; Isotropy ; Amplitude ; Stress (linguistics) Nuclear Materials and Properties ; Nuclear Engineering Thermal-Hydraulics ; Elasticity and Wave Propagation
Authors: Wang Xian | Hua Zhou | Duanyang Geng | Zehao Zha | Zhengzhong Li
Source: INMATEH Agricultural Engineering (article, 2025-08-29)
Field: Materials Science — Biomaterials

DISCRETE ELEMENT PARAMETER CALIBRATION AND OPTIMIZATION OF LAMINARIA JAPONICA BASED ON GP-PSO-XGBOOST MODEL During the mechanized harvesting of Laminaria japonica, it is prone to breakage and damage, resulting in an increased loss rate. To accelerate the optimization of harvesting equipment for Laminaria japonica, this study established a simulation model based on the discrete element method. The Hertz-Mindlin with Bonding contact model was used, and parameters of Laminaria japonica were calibrated through shear tests. Using the maximum shear force (Fmax) as the test indicator, the optimal parameters were obtained through Plackett-Burman test, the steepest climb test, Box-Behnken test, and the GP-PSO-XGBoost regression prediction model. The results indicated that when the coefficient of restitution of Laminaria japonica-steel was 0.45, the normal stiffness per unit area was 303 MN/m3, the shear stiffness per unit area was 378 MN/m3, and the bonding radius was 0.70 mm, the relative error of Fmax was 0.75%. The average error of the Fmax for samples at different thicknesses was 3.09%, and the relative error of the maximum puncture force in puncture test was 5.59%. Finally, a discrete element model of the whole Laminaria japonica was established. This study offers theoretical support for the development and optimization of harvesting equipment for Laminaria japonica. Japonica ; Discrete element method ; Mathematics ; Box–Behnken design ; Structural engineering ; Statistics ; Engineering ; Response surface methodology ; Mechanics ; Physics ; Botany ; Biology Calcium Carbonate Crystallization and Inhibition ; Soil Mechanics and Vehicle Dynamics ; Agricultural Engineering and Mechanization
Authors: Arzu Pashayeva | Khanimbaji Mammadova
Source: SCIENTIFIC WORK (article, 2025-04-10)
Field: Chemistry — Physical and Theoretical Chemistry

Organic Chemistry Lessons: A Creative Approach to Laboratory Work in Developing Students' Competency Skills This article examines the impact of integrating a creative approach into laboratory work in organic chemistry lessons to enhance students' competency development.The enrichment of traditional laboratory practices with innovative methods, fostering problem-solving skills, and encouraging independent research are explored.The study provides examples of how laboratory work can enhance students' critical thinking, practical skills, and scientific inquiry abilities.The discussed approaches not only increase the effectiveness of modern chemistry education but also stimulate students' interest in scientific processes and uncover their creative potential. Work (physics) ; Mathematics education ; Medical education ; Psychology ; Pedagogy ; Chemistry ; Engineering ; Engineering ethics ; Medicine ; Mechanical engineering Various Chemistry Research Topics
Authors: Godfrey Pisirai Marumure | Jeanne Kriek
Source: Science education international (article, 2025-09-30)
Field: Chemistry — Physical and Theoretical Chemistry

Teachers’ Teaching Strategies, Opportunities, and Challenges When Developing Conceptual Understanding of Redox Reactions Teaching redox reactions requires careful investigation as learners often display a range of misconceptions, particularly in connecting the chemistry levels of representation: macroscopic, sub-microscopic, and symbolic. This study explores teachers’ teaching strategies, opportunities, and challenges when developing conceptual understanding of redox reactions. The study is guided by the pedagogical link-making framework while supported by the expanding triangle chemistry-learning framework. An interpretive approach was followedusing an interview protocol and observation criteria document to collect qualitative data. A purposely sampled group of ten chemistry teachers teaching in public schools in rural settings were interviewed, and three had lessons video/audio recorded and transcribed verbatim and analyzed using ATLAS-ti. The study results displayed as networks, Sankey frequency diagrams and text show that teachers used various strategies from passive to active strategies. Teachers adopted passive and active teaching strategies to enhance learners’ learningprogression of concepts. Teaching opportunities are presented as the positive applications of dimensions for conceptual understanding, contextualized analogical models and the provision of relevance of redox reactions. The teachers’ active teaching strategies enhanced the relevance of the concepts by connecting them to learners’ lives. Teaching challenges were limited content knowledge leading to challenges in shifting across levels of representation, particularly from the sub-microscopic level. Teachers demonstrated inadequate pedagogical skills that enhance conceptual understanding. Recommendations include developing focused professional development in pedagogical content knowledge of the particulate nature of matter, particularly the sub-microscopic level of representation of difficult topics and switching across different levels of representation. Relevance (law) ; Conceptual framework ; Representation (politics) ; Teaching method ; Science education ; Concept learning ; Qualitative research ; Professional development ; Faculty development Various Chemistry Research Topics
Authors: Arzu Pashayeva | Xanımbacı Məmmədova
Source: SCIENTIFIC WORK (article, 2025-04-10)
Field: Chemistry — Physical and Theoretical Chemistry

Organic Chemistry Lessons: A Creative Approach to Laboratory Work in Developing Students' Competency Skills This article examines the impact of integrating a creative approach into laboratory work in organic chemistry lessons to enhance students' competency development.The enrichment of traditional laboratory practices with innovative methods, fostering problem-solving skills, and encouraging independent research are explored.The study provides examples of how laboratory work can enhance students' critical thinking, practical skills, and scientific inquiry abilities.The discussed approaches not only increase the effectiveness of modern chemistry education but also stimulate students' interest in scientific processes and uncover their creative potential. Work (physics) ; Mathematics education ; Chemistry ; Psychology ; Engineering ; Pedagogy ; Engineering ethics ; Mechanical engineering Various Chemistry Research Topics
Authors: Salastri Rohiat | Diana Rochintaniawati | R Riandi
Source: Journal of Tropical Chemistry Research and Education (article, 2025-10-01)
Field: Chemistry — Physical and Theoretical Chemistry

Micro-Scale Approach in Organic Chemistry Learning as an Innovative Strategy to Support Sustainable Development Goals (SDGS) The micro-scale approach in organic chemistry learning offers an innovative solution to enhance the effectiveness of the teaching and learning process while supporting the Sustainable Development Goals (SDGs). This study aims to describe the implementation of the micro-scale approach in the curriculum of an organic chemistry course at a higher education institution. This approach emphasizes the use of small quantities of chemicals, simple laboratory equipment, and eco-friendly techniques to minimize laboratory waste, operational costs, and negative environmental impacts. The research method involves qualitative analysis to evaluate the effectiveness of this approach in terms of learning outcomes and its relevance to the SDGs, particularly those related to quality education. The results reveal that the micro-scale approach has not yet been implemented in organic chemistry learning. However, organic chemistry lecturers and students have a general understanding of the concept of the micro-scale approach. Moreover, both lecturers and students recognize that the micro-scale concept aligns with the objectives of sustainable development. This study concludes that the micro-scale approach is an innovative and effective strategy to support sustainability-oriented organic chemistry learning. The implementation of this approach is expected to serve as a replicable learning model across various educational institutions, contributing to broader SDGs achievements Relevance (law) ; Curriculum ; Quality (philosophy) ; Sustainable development ; Process (computing) ; Sustainability ; Chemistry education Various Chemistry Research Topics ; Problem and Project Based Learning
Authors: Weiyi Ying | Zheng Yang | Xiang Liu | Qingrong Yao | Jiang Wang
Source: Materials (article, 2025-05-16)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Effects of Lanthanum Element and Heat Treatment on Phase Formation and Magnetic Properties of SmFe10V2 Melt-Spun Ribbons The effects of the La element and heat treatment on the phase composition and magnetic properties of SmFe<sub>10</sub>V<sub>2</sub> melt-spun ribbons are studied by X-ray diffraction (XRD) and vibrating sample magnetometry (VSM). The XRD results show that the Sm<sub>1-<i>x</i></sub>La<i><sub>x</sub></i>Fe<sub>10</sub>V<sub>2</sub> (<i>x</i> = 0, 0.2, 0.4) and SmLa<i><sub>y</sub></i>Fe<sub>10</sub>V<sub>2</sub> (<i>y</i> = 0.1, 0.2, 0.3) melt-spun ribbons are composed of the 1:12 main phase with a ThMn<sub>12</sub> structure, α-Fe phase and α-La phase, and the phase formation of the SmLa<sub>0.2</sub>Fe<sub>10</sub>V<sub>2</sub> melt-spun ribbon is not changed after annealing at different temperatures (700-900 °C) and times (10-60 min). The XRD results indicate that La substitution in Sm<sub>1-<i>x</i></sub>La<i><sub>x</sub></i>Fe<sub>10</sub>V<sub>2</sub> ribbons has a negative effect on the formation of the 1:12 main phase, while the addition of a small amount of La into SmLa<i><sub>y</sub></i>Fe<sub>10</sub>V<sub>2</sub> ribbons does not affect the formation of the 1:12 main phase. The VSM measurements show that La substitution would result in decreases in the magnetic properties of Sm<sub>1-<i>x</i></sub>La<i><sub>x</sub></i>Fe<sub>10</sub>V<sub>2</sub> ribbons. With the increase in La substitution, the coercivity of the ribbon decreases to 2.7 kOe with <i>x</i> = 0.2 and 0.43 kOe with <i>x</i> = 0.4. However, the magnetic properties of SmLa<i><sub>y</sub></i>Fe<sub>10</sub>V<sub>2</sub> ribbons with a small amount of La (<i>y</i> = 0.2) are improved. Furthermore, the experimental results for the SmLa<sub>0.2</sub>Fe<sub>10</sub>V<sub>2</sub> ribbon after different heat treatments show that the magnetic properties become better initially and then become worse. Finally, the best magnetic properties (H<sub>cj</sub> = 5.12 kOe, B<sub>r</sub> = 6.89 kGs, M<sub>r</sub>/M<sub>s</sub> = 0.75, (BH)<sub>max</sub> = 6.78 MGOe) for the SmLa<sub>0.2</sub>Fe<sub>10</sub>V<sub>2</sub> ribbon are obtained after annealing at 800 °C for 10 min. Materials science ; Lanthanum ; Phase (matter) ; Melt spinning ; Composite material ; Metallurgy ; Chemistry ; Inorganic chemistry Magnetic Properties of Alloys ; Rare-earth and actinide compounds ; Magnetic and transport properties of perovskites and related materials