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Journal articles on the topic 'Environmental chemistry Mathematics'

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Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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1

Bruggemann, Rainer, and Lars Carlsen. "Partial Order in Environmental Chemistry." Current Computer-Aided Drug Design 16, no. 3 (June 2, 2020): 257–69. http://dx.doi.org/10.2174/1573409915666190416160350.

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Background: The theory of partial order is a branch of Discrete Mathematics and is often seen as pretty esoteric. However, depending on a suitable definition of an order relation, partial order theory has some statistical flavor. Here we introduce the application of partial order for environmental chemistry. Objective : We showed that partial order is an instrument, which at the same time, has both data exploration - and evaluation potency. Methods: The partial order theory was applied in this study. It depends on four indicators which describe the environmental hazards of chemicals. Results : Nineteen organic chemicals were found within a monitoring study in the German river Main and were taken as an exemplary case. The results indicated that chemicals can have a high risk on the environment, however, the type of risk is different and should not conceptually merge into a single quantity. Conclusions: Partial order theory is of help to define different regulations and environmental management plans.

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2

Ziegel, Eric R., and J. Einax. "Chemometrics in Environmental Chemistry: Statistical Methods." Technometrics 38, no. 4 (November 1996): 412. http://dx.doi.org/10.2307/1271332.

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3

Fernholz, L., S. Morgenthaler, and W. Stahel. "Statistics in Genetics and in the Environmental Sciences. (Trends in Mathematics)." Molecules 6, no. 12 (December 31, 2001): 1059. http://dx.doi.org/10.3390/61201059.

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4

Glavič, Peter. "Quantities and Units in Chemical and Environmental Engineering." Standards 2, no. 1 (February 7, 2022): 43–51. http://dx.doi.org/10.3390/standards2010004.

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The International System of Quantities (ISQ) shall be used in education and textbooks, in scientific and engineering journals, in conference papers and proceedings, in industry, among others. The names of quantities together with their symbols and units are being published by the International Organization for Standardization, the standard ISO 80000 Quantities and units, composed of 13 parts. Mathematics and natural sciences (physics, light and radiation, acoustics, physical chemistry, atomic and nuclear physics, condensed matter physics) compose most of the parts. In addition, some engineering disciplines (mechanics, thermodynamics, electromagnetism) and characteristic numbers are covered. The units are based on the International System of Units (SI). Unfortunately, chemical and process engineering, as well as environmental engineering and engineering economics, are not dealt with in the standard. In this paper, they are proposed as an additional part of the ISO standard with a tentative name Chemical and environmental engineering. The additional part of the standard is suggested to include (a) reaction and separation engineering together with mass transfer and reaction kinetics, (b) process design, control, and optimization, (c) process economics, mathematical modeling, operational research, and (d) environmental engineering with climate change, pollution abatement, an increase in resource efficiency, zero waste and circular economy. The number of quantities is planned but not limited to about 70, the average of ISO 80000 parts. Each quantity item contains a quantity name and definition (including an equation if suitable), SI unit, and remarks (running number will be added later). The rules are defined in ISO 80000-1 General rules, and the practice of the other ISO 80000 parts is respected; the quantities already included in the other parts are not repeated. In addition, the IUPAC (International Union of Pure and Applied Chemistry) Green Book rules are respected. The literature used included traditional textbooks, encyclopedias, handbooks from the chemical engineering and environmental fields. Some common mistakes in printing symbols of quantities and units are mentioned.

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Becker, Joanne Rossi. "Research, Reflection, Practice: Gender and Mathematics: An Issue for the Twenty-First Century." Teaching Children Mathematics 9, no. 8 (April 2003): 470–73. http://dx.doi.org/10.5951/tcm.9.8.0470.

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Is gender still a salient equity issue for today's mathematics classrooms? Although considerable progress in women's participation in mathematics has been achieved in the last twentyfive years, inequities still exist. For example, women represent less than fifteen percent of the employed scientists and engineers in computer science, mathematics, agricultural science, environmental science, chemistry, geology, physics and astronomy, economics, and engineering (NSF 1996). Females score an average of thirty points lower than males on the mathematics section of the SAT. Despite more than two decades of intervention, parity remains a vision for the future. This article discusses our role as teachers in giving girls an equitable foundation in mathematics in the elementary grades.

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Miertus, Stanislav, and Vladimir Frecer. "Continuum models of environmental effects on molecular structure and mechanisms in chemistry and biology." Journal of Mathematical Chemistry 10, no. 1 (1992): 183–204. http://dx.doi.org/10.1007/bf01169174.

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7

Hunter, Margaret A. "Opportunities for Environmental Science and Engineering Outreach through K–12 Mathematics Programs." Environmental Engineering Science 23, no. 3 (May 2006): 461–71. http://dx.doi.org/10.1089/ees.2006.23.461.

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8

Welton, Tom. "Solvents and sustainable chemistry." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 471, no. 2183 (November 2015): 20150502. http://dx.doi.org/10.1098/rspa.2015.0502.

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Solvents are widely recognized to be of great environmental concern. The reduction of their use is one of the most important aims of green chemistry. In addition to this, the appropriate selection of solvent for a process can greatly improve the sustainability of a chemical production process. There has also been extensive research into the application of so-called green solvents, such as ionic liquids and supercritical fluids. However, most examples of solvent technologies that give improved sustainability come from the application of well-established solvents. It is also apparent that the successful implementation of environmentally sustainable processes must be accompanied by improvements in commercial performance.

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9

Frischknecht, P. M. "Environmental science education at the Swiss Federal Institute of Technology (ETH)." Water Science and Technology 41, no. 2 (January 1, 2000): 31–36. http://dx.doi.org/10.2166/wst.2000.0040.

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In 1987 ETHZ, the Swiss Federal Institute of Technology, first offered a degree course in environmental sciences. The curriculum is based upon a comprehensive view of the environment and its systems. The first two years of the programme cover a multidisciplinary basic education in mathematics, natural and social sciences. For their advanced education in the fifth to nineth semesters the students select one of four science disciplines (Chemistry/Microbiology, Physics, Biology or Environmental Hygiene) and one of four environmental systems (Aquatic Systems, Atmosphere, Terrestrial Systems or Anthroposphere). The education in natural sciences is accompanied by a compulsory case study, which is implemented as a didactic tool to teach ecological problem-solving, and courses in environmental social sciences and environmental technology. During the professional practical training of about four months, students gain insight into the constraints of a professional environment. In the tenth semester a diploma project - equivalent to a master's thesis - is carried out.

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10

Huzinaga, S., S. Katsuki, and O. Matsuoka. "Effective Hamiltonian method for environmental effects." Journal of Mathematical Chemistry 10, no. 1 (1992): 25–39. http://dx.doi.org/10.1007/bf01169169.

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11

Pardo, R., E. Barrado, and Y. Castrillejo. "Chemometric aspects of an environmental study." Journal of Chemometrics 3, S1 (March 30, 2005): 315–21. http://dx.doi.org/10.1002/cem.1180030524.

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12

Karpudewan, Mageswary, Zurida Ismail, and Wolff-Michael Roth. "THE EFFICACY OF A GREEN CHEMISTRY LABORATORY-BASED PEDAGOGY: CHANGES IN ENVIRONMENTAL VALUES OF MALAYSIA PRE-SERVICE TEACHERS." International Journal of Science and Mathematics Education 10, no. 3 (June 11, 2011): 497–529. http://dx.doi.org/10.1007/s10763-011-9295-y.

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13

Stapanian, M. A. "Some issues in chemometrics with environmental applications." Journal of Chemometrics 5, no. 3 (May 1991): 121–28. http://dx.doi.org/10.1002/cem.1180050302.

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14

Trevors, J. T., and M. H. Saier. "Mathematics: The Basis for Quantitative Knowledge." Water, Air, & Soil Pollution 209, no. 1-4 (December 23, 2009): 1–2. http://dx.doi.org/10.1007/s11270-009-0300-9.

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15

Fatayah, Fatayah, Ika Farida Yuliana, and Rendy Priyasmika. "STEM INTEGRATED CHEMISTRY LEARNING EFFECTIVENESS (SCIENCE, TECHNOLOGY, ENGINEERING, AND MATHEMATICS) IN THE TIME OF COVID-19." JCER (Journal of Chemistry Education Research) 6, no. 1 (August 15, 2022): 72–76. http://dx.doi.org/10.26740/jcer.v6n1.p72-76.

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Abstract. The purpose of this study was to determine the effectiveness of STEM (Science, Technology, Engineering, and Mathematics) integrated learning on the material of molecular form for Class X MA Al-Khoiriyah students. The research design used in this research is descriptive analysis. The stages of this research consist of 3 (three) stages, namely pre-research, testing the validation of research tools, and implementing STEM integrated learning. As for knowing the effectiveness is measured by indicators, namely the level of student learning completeness after integrated STEM learning activities and the resulting STEM products. From the analysis of the final test, it can be seen that of the ten students who were the research subjects, 80% had achieved completeness and the resulting STEM product was in the good category so it can be concluded that STEM integrated learning is effectively used in molecular geometry learning. Keywords: Effectiveness, STEM, Chemistry, Molecular geometry

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16

Prather, Michael J. "Lifetimes and time scales in atmospheric chemistry." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 365, no. 1856 (May 18, 2007): 1705–26. http://dx.doi.org/10.1098/rsta.2007.2040.

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Atmospheric composition is controlled by the emission, photochemistry and transport of many trace gases. Understanding the time scale as well as the chemical and spatial patterns of perturbations to trace gases is needed to evaluate possible environmental damage (e.g. stratospheric ozone depletion or climate change) caused by anthropogenic emissions. This paper reviews lessons learned from treating global atmospheric chemistry as a linearized system and analysing it in terms of eigenvalues. The results give insight into how emissions of one trace species cause perturbations to another and how transport and chemistry can alter the time scale of the overall perturbation. Further, the eigenvectors describe the fundamental chemical modes, or patterns, of the atmosphere's chemical response to perturbations.

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17

Garner, Forest C., Martin A. Stapanian, and Kirk E. Fitzgerald. "Finding causes of outliers in multivariate environmental data." Journal of Chemometrics 5, no. 3 (May 1991): 241–48. http://dx.doi.org/10.1002/cem.1180050311.

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18

Do Thi Thanh, Thu, and Dao Pham Thi Bich. "Developing competence of applying knowledge and skills for high school students through teaching STEM topics integrated with environmental protection education in Chemistry." Journal of Science Educational Science 66, no. 4E (November 2021): 271–82. http://dx.doi.org/10.18173/2354-1075.2021-0207.

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Through the STEM project teaching model, students can apply integrated knowledge in fields such as Science, Technology, Engineering and Mathematics into specific issues of practice. By participating in STEM topics, students can connect with communities and organizations to develop necessary competencies for themselves, especially the competence of applying knowledge and skills. The paper studied the design of integrated teaching activities according to the STEM teaching model in general and illustrates activities through the topic "Production of dishwashing liquid from plant waste" in order to develop the competence of applying knowledge and skills for high school students including application in environmental protection education.

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19

Elvia, Rina, Salastri Rohiat, and Sura Menda Ginting. "Identifikasi Miskonsepsi Mahasiswa Pada Pembelajaran Daring Matematika Kimia Melalui Tes Diagnostik Three Tier Multiple Choice." Hydrogen: Jurnal Kependidikan Kimia 9, no. 2 (December 31, 2020): 84. http://dx.doi.org/10.33394/hjkk.v9i2.4422.

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The aim of this study is to determine the misconceptions of Chemistry Mathematics course participants during online learning in Chemistry Education Study Program, University of Bengkulu in the 2020/2021 academic year. This research starts with an online learning process for 4 meeting using Zoom meeting application and Google Classroom using synchronous and asynchronous methods. The method used to detect misconceptions is to provide a Three tier multiple choice diagnostic test consisting of multiple choice question, clear reasons in the form of an essay, and the level of confidence in answering and giving reasons. The tool used in this research is attest tool in the form of a diagnostic test and non-test tool in the form of an interview. Data collection techniques were conducted through test sheets in the form of a Google Forms application and short interviews about diagnostic tests in the form of videos. Data analysis was conducted on response options, reasons, and confidence in responding. The results showed that online learning had an impact on the misconceptions about Chemistry Mathematics course participants with a range of 0-50% where the highest misconception identification results were found in the application of inverse trigonometric functions by 50%,while 0% misconceptions were obtained in the basic concepts of algebraic functions and conversion of rational equations into a partial fractions.

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20

Purwanto, Agung. "PENGARUH PAKET PEMBELAJARAN PENDIDIKAN LINGKUNGAN HIDUP DAN GAYA KOGNITIF TERHADAP KEMAMPUAN MEMECAHKAN MASALAH LINGKUNGAN (Studi Eksperimen pada Jurusan Kimia, FMIPA Universitas Negeri Jakarta)." Jurnal Ilmiah Pendidikan Lingkungan dan Pembangunan 13, no. 1 (May 4, 2017): 55–68. http://dx.doi.org/10.21009/plpb.131.05.

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The objective of the research was aimed at finding out whether there is effect of the environmental education learning package and cognitive style on environmental problem solving skills. This research conducted was exsperiment methode. The target of population is the students at the Mathematics and Natural Sciences at the State University of Jakarta. Then accessible of population is Department of Chemistry and take it by randomly (n=40).The research came five conclusions are follow: the first, as a whole the ability of students problem-solving learning environment in an integrated package of environmental education is high than the monolithic environmental education learning package; the second, the ability of students problem-solving learning environment in field independent style cognitive is not high than the field dependent style cognitive; the third, interaction effect between learning and cognitive styles environmental education package; the fourth, the ability of students to solve environmental problems based on cognitive style of field dependent on an integrated learning package environmental education lower than on learning environmental education monolithic package, and the five, there is the ability of students to solve environmental problems based on field independent cognitive styles in an integrated learning package environmental education is high than on learning environmental education monolithic package.

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21

Thoma, Greg J., Danny D. Reible, Kalliat T. Valsaraj, and Louis J. Thibodeaux. "Efficiency of capping contaminated sediments in situ. 2. Mathematics of diffusion-adsorption in the capping layer." Environmental Science & Technology 27, no. 12 (November 1993): 2412–19. http://dx.doi.org/10.1021/es00048a015.

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22

Baitureeva, G. K., and Z. K. Kuanysheva. "The problem of the development of interdisciplinary connection of chemistry and mathematics by solving tasks of chemical content." Bulletin of Kazakh National Women's Teacher Training University, no. 1 (April 4, 2022): 27–35. http://dx.doi.org/10.52512/2306-5079-2022-89-1-27-35.

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23

Crofts, Jonathan J., and Ernesto Estrada. "A statistical mechanics description of environmental variability in metabolic networks." Journal of Mathematical Chemistry 52, no. 2 (November 12, 2013): 675–88. http://dx.doi.org/10.1007/s10910-013-0288-7.

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24

Valderrama, E., and R. J. Wheatley. "An environmental pseudopotential approach to molecular interactions: Implementation in MOLPRO." Journal of Computational Chemistry 24, no. 16 (October 1, 2003): 2075–82. http://dx.doi.org/10.1002/jcc.10353.

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25

Laurent, Adèle D., Vitaly N. Glushkov, Thibaut Very, and Xavier Assfeld. "Toward the understanding of the environmental effects on core ionizations." Journal of Computational Chemistry 35, no. 15 (April 18, 2014): 1131–39. http://dx.doi.org/10.1002/jcc.23604.

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26

Stapanian, Martin A., Forest C. Garner, Kirk E. Fitzgerald, George T. Flatman, and John M. Nocerino. "Finding suspected causes of measurement error in multivariate environmental data." Journal of Chemometrics 7, no. 3 (May 1993): 165–76. http://dx.doi.org/10.1002/cem.1180070304.

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27

Meissner, Mirosław. "In Memoriam. Elżbieta Maria Walerian, Ph.D., D.Sc." Archives of Acoustics 39, no. 1 (March 1, 2015): 153–54. http://dx.doi.org/10.2478/aoa-2014-0017.

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Abstract Elżbieta M. Walerian, Ph.D., D.Sc., a retired employee of the Institute of Fundamental Technological Research of the Polish Academy of Sciences (IPPT PAN), passed away after a serious illness, on the 26th December 2013. She was one of the scientific leaders in the Section of Environmental Acoustics of IPPT PAN and her career, educational and organizational activities were inseparably linked with the acoustics. Elżbieta Walerian was born on August 9th 1950 in Poznań. She graduated from the Faculty of Mathematics, Physics and Chemistry of the Adam Mickiewicz University in Poznań, receiving her Master of Science degree in the environmental acoustics in 1973. Five years later, under the supervision of Professor Ignacy Malecki, she obtained her PhD title, in the physical acoustics, in IPPT PAN in Warsaw. In 1979 she began working at the Section of Environmental Acoustics of IPPT PAN, where she dealt with the diffraction of acoustic waves and a description of the sound field produced by vehicles moving in an urban area.

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28

Pop, Viorel. "Mathematical Models Issues of Environmental Management." Studia Universitatis „Vasile Goldis” Arad – Economics Series 25, no. 1 (May 1, 2015): 60–73. http://dx.doi.org/10.1515/sues-2015-0005.

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Abstract Today the world is facing, more and more, different sources of pollution, the most affected areas being the proximity of big industrial centers (e.g.: chemistry, mining and metallurgy, machinery building etc.). Baia Mare industrial area is a typical one for such a situation. To maintain a clean and healthy environment in Baia Mare city and in the surrounding areas, important costs are needed. The usefulness of the mathematical models consists in the possibility of mathematical processing of industrial parameters evolutions, with relevant interpretations on various influences and their correction for achieving the set goals (maximizing financial efficiency, environmental protection with the compliance of legal requirements etc.)

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29

Duong Thi Kim, Oanh, and Hang Nguyen Thi Thai. "INTEGRATED STEM EDUCATION BY COMBINING PROJECT-BASED LEARNING WITH THE BSCS 5E INSTRUCTIONAL MODEL IN CHEMISTRY SUBJECT FOR THE GRADE 12." Journal of Science Educational Science 67, no. 3 (July 2022): 209–19. http://dx.doi.org/10.18173/2354-1075.2022-0059.

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STEM education is not a new pedagogical approach in the world, but it would be a new approach in Vietnamese education where students are familiar with learning separated disciplines to acquire academic knowledge in class. To better prepare students about knowledge and skills to adapt to the 4th Industrial Revolution requirements, integrated education of four disciplines, including Science, Technology, Engineering, and Mathematics (STEM), has been promoted in high schools in Vietnam. In the general education program, Chemistry is a subject in the natural sciences group at the high school level (Grade 10, 11 and 12). Chemistry helps students acquire core knowledge about chemistry and apply this knowledge to life. This article aims to clarify the concept, instructional models of integrated STEM education and Project-Based Learning (PBL) - one of the teaching methods commonly applied in integrated STEM education to stimulate students to learn actively and experientially. On the other hand, a combined PBL with the BSCS 5E instructional model to deploy integrated STEM education in a STEM learning project named “Zero waste” of Chemistry 12 is also thoroughly analyzed. Quantitative and qualitative findings on the development of STEM skills of 352 students participating in the “Zero Waste” project in the three-school year at Dao Son Tay high school in Thu Duc City, Vietnam, reveal that their STEM skills were developed. Some minor recommendations on effectively organizing integrated STEM education in Chemistry 12 will be proposed.

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Zhou, Zhi-Wu, Julián Alcalá, Moacir Kripka, and Víctor Yepes. "Life Cycle Assessment of Bridges Using Bayesian Networks and Fuzzy Mathematics." Applied Sciences 11, no. 11 (May 27, 2021): 4916. http://dx.doi.org/10.3390/app11114916.

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At present, reducing the impact of the construction industry on the environment is the key to achieving sustainable development. Countries all over the world are using software systems for bridge environmental impact assessment. However, due to the complexity and discreteness of environmental factors in the construction industry, they are difficult to update and determine quickly, and there is a phenomenon of data missing in the database. Most of the lost data are optimized by Monte Carlo simulation, which greatly reduces the reliability and accuracy of the research results. This paper uses Bayesian advanced fuzzy mathematics theory to solve this problem. In the research, a Bayesian fuzzy mathematics evaluation and a multi-level sensitivity priority discrimination model are established, and the weights and membership degrees of influencing factors were defined to achieve comprehensive coverage of influencing factors. With the support of theoretical modelling, software analysis and fuzzy mathematics theory are used to comprehensively evaluate all the influencing factors of the five influencing stages in the entire life cycle of the bridge structure. The results show that the material manufacturing, maintenance, and operation of the bridge still produce environmental pollution; the main source of the emissions exceeds 53% of the total emissions. The effective impact factor reaches 3.01. At the end of the article, a big data sensitivity model was established. Through big data innovation and optimization analysis, traffic pollution emissions were reduced by 330 tonnes. Modeling of the comprehensive research model; application; clearly confirms the effectiveness and practicality of the Bayesian network fuzzy number comprehensive evaluation model in dealing with uncertain factors in the evaluation of the sustainable development of the construction industry. The research results have made important contributions to the realization of the sustainable development goals of the construction industry.

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Thornton, Anthony R., Avraham J. van der Horn, Elena Gagarina, Wout Zweers, Devaraj van der Meer, and Onno Bokhove. "Hele-Shaw beach creation by breaking waves: a mathematics-inspired experiment." Environmental Fluid Mechanics 14, no. 5 (April 17, 2014): 1123–45. http://dx.doi.org/10.1007/s10652-014-9350-7.

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32

Cruz-Monteagudo, Maykel, Humberto González-Díaz, Guillermín Agüero-Chapín, Lourdes Santana, Fernanda Borges, Elena Rosa Domínguez, Gianni Podda, and Eugenio Uriarte. "Computational chemistry development of a unified free energy Markov model for the distribution of 1300 chemicals to 38 different environmental or biological systems." Journal of Computational Chemistry 28, no. 11 (August 2007): 1909–23. http://dx.doi.org/10.1002/jcc.20730.

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33

Alvarez-Guerra, Manuel, Davide Ballabio, José Manuel Amigo, Javier R. Viguri, and Rasmus Bro. "A chemometric approach to the environmental problem of predicting toxicity in contaminated sediments." Journal of Chemometrics 24, no. 7-8 (November 25, 2009): 379–86. http://dx.doi.org/10.1002/cem.1264.

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34

Pushcharovsky, D. Yu. "The Modern Crystallography: Is It Useful for the Earth’s Sciences?" Moscow University Bulletin. Series 4. Geology, no. 1 (December 15, 2022): 3–23. http://dx.doi.org/10.33623/0579-9406-2023-1-3-23.

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Formed in XVII century at the junction between mineralogy and mathematics subsequently crystallography is considered as the science which is closer to physics, chemistry, biology and even to medicine. Due to this fact, the community, associated with the Earth’s sciences, accepts it with some restraint. The importance of the most advanced crystallographic approaches, the results obtained and the new insights which contribute the further development of the new scientific ideas about the composition and the structure of the Earth and some terrestrial planets are considered.

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Koam, Ali N. A., Ali Ahmad, and Ashfaq Ahmed Qummer. "On the Study of Reverse Degree-Based Topological Properties for the Third Type of p th Chain Hex-Derived Network." Journal of Mathematics 2021 (November 3, 2021): 1–12. http://dx.doi.org/10.1155/2021/4540276.

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Vertices and edges are made from a network, with the degree of a vertex referring to the number of connected edges. The chance of every vertex possessing a given degree is represented by a network’s degree appropriation, which reveals important global network characteristics. Many fields, including sociology, public health, business, medicine, engineering, computer science, and basic sciences, use network theory. Logistical networks, gene regulatory networks, metabolic networks, social networks, and driven networks are some of the most significant networks. In physical, theoretical, and environmental chemistry, a topological index is a numerical value assigned to a molecular structure/network that is used for correlation analysis. Hexagonal networks of dimension t are used to build hex-derived networks, which have a wide range of applications in computer science, medicine, and engineering. For the third type of hex-derived networks, topological indices of reverse degree based are discussed in this study.

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36

Boyes, Edward D., Alec P. LaGrow, Michael R. Ward, Thomas E. Martin, and Pratibha L. Gai. "Visualizing single atom dynamics in heterogeneous catalysis using analytical in situ environmental scanning transmission electron microscopy." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378, no. 2186 (October 26, 2020): 20190605. http://dx.doi.org/10.1098/rsta.2019.0605.

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Progress is reported in analytical in situ environmental scanning transmission electron microscopy (ESTEM) for visualizing and analysing in real-time dynamic gas–solid catalyst reactions at the single-atom level under controlled reaction conditions of gas environment and temperature. The recent development of the ESTEM advances the capability of the established ETEM with the detection of fundamental single atoms, and the associated atomic structure of selected solid-state heterogeneous catalysts, in catalytic reactions in their working state. The new data provide improved understanding of dynamic atomic processes and reaction mechanisms, in activity and deactivation, at the fundamental level; and in the chemistry underpinning important technological processes. The benefits of atomic resolution-E(S)TEM to science and technology include new knowledge leading to improved technological processes, reductions in energy requirements and better management of environmental waste. This article is part of a discussion meeting issue ‘Dynamic in situ microscopy relating structure and function’.

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37

Denham, Mike. "Book review: Chemometrics in environmental chemistry—statistical methods, ed. by J. Einax, Berlin, Springer, 1995, ISBN 0-387-58941-4, xvi+330 pp, DM 198." Journal of Chemometrics 11, no. 2 (March 1997): 179. http://dx.doi.org/10.1002/(sici)1099-128x(199703)11:2<179::aid-cem457>3.0.co;2-w.

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38

Eriksson, Lennart, Erik Johansson, Martin M�ller, and Svante Wold. "On the selection of the training set in environmental QSAR analysis when compounds are clustered." Journal of Chemometrics 14, no. 5-6 (2000): 599–616. http://dx.doi.org/10.1002/1099-128x(200009/12)14:5/6<599::aid-cem619>3.0.co;2-8.

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39

Tlidi, M., M. G. Clerc, D. Escaff, P. Couteron, M. Messaoudi, M. Khaffou, and A. Makhoute. "Observation and modelling of vegetation spirals and arcs in isotropic environmental conditions: dissipative structures in arid landscapes." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 376, no. 2135 (November 12, 2018): 20180026. http://dx.doi.org/10.1098/rsta.2018.0026.

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We report for the first time on the formation of spirals like vegetation patterns in isotropic and uniform environmental conditions. The vegetation spirals are not waves and they do not rotate. They belong to the class of dissipative structures found out of equilibrium. Isolated or interacting spirals and arcs observed in South America (Bolivia) and North Africa (Morocco) are interpreted as a result of curvature instability that affects the circular shape of localized patches. The biomass exhibits a dynamical behaviour with arcs that transform into spirals. Interpretation of observations and of the predictions provided by the theory is illustrated by recent measurements of peculiar plant morphology (the alfa plant, or Stipa tenacissima L.) originated from northwestern Africa and the southern part of the Iberian Peninsula. This article is part of the theme issue ‘Dissipative structures in matter out of equilibrium: from chemistry, photonics and biology (part 2)’.

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Coutinho, Isabel Ribau. "Engaging Students in Chemistry and Physics with an Active Methodology." Advances in Social Sciences Research Journal 9, no. 12 (January 5, 2023): 488–508. http://dx.doi.org/10.14738/assrj.912.13708.

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Science, technology, engineering, and mathematics (STEM) play an important role in the global economy through technological innovation, creation, and problem-solving in this century. But it is difficult to capture students’ attention to it, and the loss of students in the STEM field hinders society's development, and Portugal is no exception. The students feel that this field is difficult, they feel disappointed as the academic outcomes are more difficult to obtain in the upper secondary, and they easily give up on this area and/or choose other fields. To mesmerize students in the science area and reinforce their positive emotions a project was elaborated based on flipped classrooms with a laboratory station model and started in September 2021. A study case was designed to perceive the impact of the laboratory station methodology and flipped classrooms on the motivation of upper-secondary science students. Self-response questionnaires were applied before and after an intervention phase where students had flipped classrooms and laboratory stations, experimental classes, during one school year. This research concludes that this teaching methodology allows students to maintain motivation throughout the school year. The teacher´s attitudes regarding school, learning and teaching processes, influence students and can trigger positive emotions concerning overcoming school difficulties and barriers they found during their learning journey. It is essential to disseminate these results, as they can help teachers to face the difficulties of engaging students in the learning process in the science field. As the limitation of this study is the small sample (26 students), this study will be replicated with new students in 10th grade and students who were part of this study will continue to be followed as this methodology will continue to be applied in 11grade.

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Altermark, Bjørn, Steinar Thorvaldsen, Elin Moe, Arne O. Smalås, and Nils P. Willassen. "Sequence comparison and environmental adaptation of a bacterial endonuclease." Computational Biology and Chemistry 31, no. 3 (June 2007): 163–72. http://dx.doi.org/10.1016/j.compbiolchem.2007.03.003.

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LAISNIMA, LHONY, and TIURLINA SIREGAR. "MODUL PEMBELAJARAN BERBASIS SCIENCE, TECHNOLOGY, ENGINEERING AND MATHEMATICS (STEM) UNTUK MENINGKATKAN HASIL BELAJAR DAN KETERAMPILAN PROSES PESERTA DIDIK PADA MATERI REDOKS DAN SEL ELEKTROLISIS." Jurnal Ilmu Pendidikan Indonesia 8, no. 2 (June 16, 2020): 84–90. http://dx.doi.org/10.31957/jipi.v8i2.1237.

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This research is a research and development that aims to find out, increase learning outcomes and process skills of students using the Chemistry module by using the module development method. The sample of the research class XII IPA YABT Christian High School. The results showed that: Increased student learning outcomes n-Gain an average of 0.53 with a moderate category. Improved students' process skills by using STEM-based modules on redox material and Electrolysis Cells in the skilled category (78%).

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Faraldo-Gómez, José D., and Benoît Roux. "Characterization of conformational equilibria through Hamiltonian and temperature replica-exchange simulations: Assessing entropic and environmental effects." Journal of Computational Chemistry 28, no. 10 (2007): 1634–47. http://dx.doi.org/10.1002/jcc.20652.

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Saleh, Muhammad Fajri Ramadhan Muslim, Miswan Miswan, and Riska Septiana. "ANALISIS KADAR TIMBAL (Pb) PADA BERBAGAI TUMBUHAN DI KAWASAN STASIUN PENGISIAN BAHAN BAKAR UMUM (SPBU) KOTA PALU." Biocelebes 16, no. 2 (December 31, 2022): 146–53. http://dx.doi.org/10.22487/bioceb.v16i2.16132.

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Exhaust gas produced by motorized vehicles releases lead (Pb) into the environment and can be absorbed into plant tissues. This study aimed to examine the content of lead (Pb) accumulated in leaves. Sampling used purposive sampling as a sampling method at four gas stations in Palu City. Pb levels were determined by atomic absorption spectrophotometry (AAS) at the Laboratory of Analytical and Environmental Chemistry, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Tadulako University. The results showed that the highest to lowest lead absorption in the leaves was Syzygium myrtifolium Walp; 0.75 mg/l from Tawaeli gas station, Bouganvillea spectabilis Willd; 0.67 mg/l from Maluku gas station, Polyalthia longifolia var. pendula; 0.67 mg/l at Yos Sudarso gas stations, and Dracaena reflexa Lam; 0.58 mg/l from Diponegoro gas station. The concentration of lead (Pb) found in each plant from gas stations is still below the maximum threshold set by SNI 01-7387:2009, which is 0.5-3 ppm. The ambient air content around the gas station is still below the air quality standard for measuring the lead (Pb) 2 g/m3 parameter.

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Koam, Ali N. A., Ali Ahmad, and Yasir Ahmad. "Computation of reverse degree-based topological indices of hex-derived networks." AIMS Mathematics 6, no. 10 (2021): 11330–45. http://dx.doi.org/10.3934/math.2021658.

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<abstract><p>Network theory gives an approach to show huge and complex frameworks through a complete arrangement of logical devices. A network is made is made of vertices and edges, where the degree of a vertex refers to the number of joined edges. The degree appropriation of a network represents the likelihood of every vertex having a particular degree and shows significant worldwide network properties. Network theory has applications in many disciplines like basic sciences, computer science, engineering, medical, business, public health and sociology. There are some important networks like logistical networks, gene regulatory networks, metabolic networks, social networks, derived networks. Topological index is a numerical number assigned to the molecular structure/netwrok which is used for correlation analysis in physical, theoretical and environmental chemistry. The hex-derived networks are created by hexagonal networks of dimension $ t $, these networks have an assortment of valuable applications in computer science, medical science and engineering. In this paper we discuss the reverse degree-based topological for third type of hex-derived networks.</p></abstract>

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Nweze, Bernadine Ngozi, and Comfort Ngozichukwuka Ogwu. "Effect of Computer-Aided Instruction on Chemistry Students’ Achievement in Organic Chemical Nomenclature in Enugu Education Zone of Enugu State, Nigeria." British Journal of Education 10, no. 13 (October 15, 2022): 68–77. http://dx.doi.org/10.37745/bje.2013/vol10n136877.

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This study investigated the effect of Computer-Aided Instruction on chemistry students’ achievement in organic chemical nomenclature in Enugu Education zone of Enugu State, Nigeria. One research question and one hypothesis guided the study. The design of the study adopted was quasi experimental, pretest-post test, non equivalent control design. The sample for the study comprised of 308 chemistry students (122 male and 186 female) purposively sampled from a population of 2,734 SS1chemistry students in Enugu Education zone of Enugu state. The instrument used for data collection was Teacher Made Organic Nomenclature Achievement Test (TMONAT) with 20 items multiple choice test. The instrument was constructed by the researchers and validated by two experts, one from the department of science education and one from the department of mathematics computer education (measurement and evaluation unit, Enugu State University of Science and Technology, (ESUT). TMONAT achieved a reliability of 0.87 calculated using kuder Richardson 20 (KR-20). Treatment lasted for six weeks. Mean and standard deviation were used to answer research questions while hypothesis was tested at 0.05 significance using Analysis of Covariance (ANCOVA). Males and Females were taught using computer-aided instruction (CAI). The findings of the study revealed that male and female chemistry students taught organic chemical nomenclature (OCN) with Computer-Aided Instruction (CAI) were almost at par in their achievement in OCN. Gender has no significance influence on students’ achievement in OCN with CAI. Based on the findings, it was recommended among others that Curriculum planners should include CAI as a model of instruction that promotes gender-equity.

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Mehler, Ernest L. "Self-consistent, nonorthogonal group function approximation: An ab initio approach for modelling interacting fragments and environmental effects." Journal of Mathematical Chemistry 10, no. 1 (1992): 57–91. http://dx.doi.org/10.1007/bf01169171.

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JiJi, Ren�e D., Greger G. Andersson, and Karl S. Booksh. "Application of PARAFAC for calibration with excitation-emission matrix fluorescence spectra of three classes of environmental pollutants." Journal of Chemometrics 14, no. 3 (2000): 171–85. http://dx.doi.org/10.1002/1099-128x(200005/06)14:3<171::aid-cem591>3.0.co;2-p.

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Thorvaldsen, Steinar, and Elinor Ytterstad. "Environmental adaptation of proteins: Regression models with simple physicochemical properties." Computational Biology and Chemistry 33, no. 5 (October 2009): 351–56. http://dx.doi.org/10.1016/j.compbiolchem.2009.07.002.

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Ijirana, Ijirana, Sitti Aminah, Supriadi Supriadi, and Detris Poba. "Ability of Chemistry Problem Solving of Senior High School Students in Palu Sulawesi Tengah." Jurnal Akademika Kimia 10, no. 2 (May 30, 2021): 64–71. http://dx.doi.org/10.22487/j24775185.2021.v10.i2.pp64-71.

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The research is purposed to describe the problem-solving ability of the Senior High School XI grader students in Palu city. The measurement of the problem-solving ability could be determined by solving the exercises of Hydrocarbon and Thermochemistry topics using the Polya’s sequences; consisting of understanding the problem, devising, doing the plan, and evaluating. The ability of students’ problem solving is classified well in every sequence in case of the number of high category students is 60%. The samples are 240 of 507 XI grade students learning chemistry in SMAN 3 and SMA Madani Terpadu in Palu City. The data of problem-solving is determined by providing a test in the form of a validated assay. The result shows the average of XI graders in Palu City only capable of solving the problem without understanding, devising, and evaluating while solving hydrocarbon topics. The ability is not even possessed by students in Thermochemistry. It implies that senior high school students in Palu could not represent the problem in the form of figure, symbol, statement, and mathematics statement or have not been able to devise the problem solving and correlate the obtained result with the related theory or concept. Therefore, the students should be trained to solve the problem in learning by application the problem-solving sequences.

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