Relevant bibliographies by topics / SCIENCE / Chemistry / General

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'SCIENCE / Chemistry / General'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 July 2024

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'SCIENCE / Chemistry / General.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "SCIENCE / Chemistry / General"

1

Cekovic, Zivorad. "Challenges for chemical sciences in the 21st century." Chemical Industry 58, no. 4 (2004): 151–57. http://dx.doi.org/10.2298/hemind0404151c.

Full text
Abstract:
Chemistry and chemical engineering have changed very significantly in the last half century. From classical sciences they have broadened their scope into biology, medicine, physics, material science, nanotechnology, computation and advanced methods of process engineering and control. The applications of chemical compounds, materials and knowledge have also dramatically increased. The development of chemical sciences in the scientifically most advanced countries, at the end of the last century was extrapolated to the next several decades in this review and challenges for chemists and chemical engineers are described. Research, discovery and invention across the entire spectrum of activities in the chemical sciences, from fundamental molecular-level chemistry to large-scale chemical processing technology are summarized. The strong integration of chemical science and engineering into all other natural sciences, agriculture, environmental science, medicine, as well as into physics, material science and information technology is discussed. Some challenges for chemists and chemical engineers are reviewed in the following fields: i) synthesis and manufacturing of chemical products, ii) chemistry for medicine and biology, iii) new materials, iv) chemical and physical transformations of materials, v) chemistry in the solving of energy problems (generation and savings), vi) environmental chemistry: fundamental and practical challenges.
APA, Harvard, Vancouver, ISO, and other styles
2

Ghibaudi, Elena. "Levi’s Periodic System vs. Mendeleev’s Periodic System: two engaged views of chemistry between science and literature." Pure and Applied Chemistry 91, no. 12 (December 18, 2019): 1941–47. http://dx.doi.org/10.1515/pac-2019-0604.

Full text
Abstract:
Abstract A comparison between the figures of Levi and Mendeleev is proposed, based on their peculiar ways of conceiving their professional role of chemist, their life experiences, their achievements and their thought. The Weltanschauung of these two figures, despite their having lived in distinct historical periods and their belonging to distinct cultures, was deeply influenced by the fact of being chemists: chemistry was – for both of them – a tool for interpreting the world around them and acting effectively in it. The chemistry Levi talks about in his writings is not just a narrative pretext: it is part of his vision of the world and a means of survival in the hellish context of the extermination camp. Similarly, Mendeleev’s idea of chemistry was always related to the life context and the human condition: this explains his pedagogical concerns and the attention payed to social, economic and cultural issues typical of his time. Both Levi and Mendeleev were chemists for whom chemistry was a means of civil engagement. Their writings show that chemistry was a source of inspiration for their ethics.
APA, Harvard, Vancouver, ISO, and other styles
3

Whittingham, M. Stanley. "Materials in the Undergraduate Chemistry Curriculum." MRS Bulletin 15, no. 8 (August 1990): 40–45. http://dx.doi.org/10.1557/s0883769400058942.

Full text
Abstract:
Although solids are one of the three states of matter, and the solid state is pervasive throughout science and our lives, students would not know it from the standard chemistry curriculum, which still emphasizes small molecules. Despite this education, a significant proportion (more than 30%) of all chemists end up as practitioners of materials chemistry, either in inorganic solids or in polymers, and they must therefore obtain on-the-job education. Not only should this need be reflected in the curriculum, but it should be possible through modern areas of chemistry such as materials to bring some of the excitement of the practicing chemist to the undergraduate student's first chemistry course, perhaps turning around the flight from science, and from chemistry and physics in particular. The American Chemical Society is encouraging this approach through the proposal of a certified BS degree in chemistry with emphasis in materials. To place the present position in perspective, one only needs to look at the recent figures tabulated by the National Science Foundation; there is a tremendous attrition of students planning to major in science and engineering during the freshman year (See Table I).Potential science majors are indeed there, but they are being lost due to their first experiences, which are usually in general chemistry and calculus, and a lesser number in biology and physics. It is therefore imperative that these courses encourage students rather than kill their enthusiasm.
APA, Harvard, Vancouver, ISO, and other styles
4

Pandey, J. "Future scope and trends of natural chemistry." Pharmaceutics and Pharmacology Research 4, no. 1 (December 23, 2020): 01–03. http://dx.doi.org/10.31579/2693-7247/024.

Full text
Abstract:
Green science is else called sustainable sciences. The structure is utilized of chemical compounds and techniques that diminish age of perilous i.e. hazardous compound substances. Green science applies corner to corner the life-cycle of a chemical compound, including its assembling, use, plan, and at last removal. Green science is extremely useful in avoidance of contamination at the atomic level, it gives creative scientific arrangements, and it lessens the negative effects of compound on human health and the environment. Green science's 12 standards (Prevent squander, Maximize particle economy, Plan less risky concoction amalgamation, Design more secure synthetic concoctions and items, Use more secure solvents what's more, response conditions and Increase vitality productivity and so on.). Green science assume significant job in pharmaceutical in creating innovatory medicate conveyance strategies which are not so much poisonous but rather more valuable, viable with least symptoms and could help a large number of patients.
APA, Harvard, Vancouver, ISO, and other styles
5

de Berg, Kevin Charles. "The significance of the origin of physical chemistry for physical chemistry education: the case of electrolyte solution chemistry." Chem. Educ. Res. Pract. 15, no. 3 (2014): 266–75. http://dx.doi.org/10.1039/c4rp00010b.

Full text
Abstract:
Physical Chemistry's birth was fraught with controversy, a controversy about electrolyte solution chemistry which has much to say about how scientific knowledge originates, matures, and responds to challenges. This has direct implications for the way our students are educated in physical chemistry in particular and science in general. The incursion of physical measurement and mathematics into a discipline which had been largely defined within a laboratory of smells, bangs, and colours was equivalent to the admission into chemistry of the worship of false gods according to one chemist. The controversy can be classified as a battle betweendissociationistson the one hand andassociationistson the other; between theEuropeanson the one hand and theBritishon the other; between theionistson the one hand and thehydrationistson the other. Such strong contrasts set the ideal atmosphere for the development of argumentation skills. The fact that a compromise position, first elaborated in the late 19th century, has recently enhanced the explanatory capacity for electrolyte solution chemistry is challenging but one in which students can participate to their benefit.
APA, Harvard, Vancouver, ISO, and other styles
6

Nikolić, Nikola D., Dragan M. Đorđević, Maja N. Stanković, Nenad S. Krstić, Milica G. Nikolić, and Vladimir D. Dimitrijević. "Chair of General and Inorganic Chemistry." Chemia Naissensis 1, no. 1 (2018): 64–71. http://dx.doi.org/10.46793/chemn1.1.064n.

Full text
Abstract:
Researchers from the Chair published over 50 scientific papers in the field of inorganic chemistry, geochemistry, bioinorganic chemistry, organometallic compounds, the chemistry of coordination compounds, tests of inorganic materials (construction materials, electrode materials, natural minerals, etc.), the development of chemically modified biosorbents. Also, they are participants in a number of national and international projects in the field of basic research and technological development, as well as projects for the popularization of science.
APA, Harvard, Vancouver, ISO, and other styles
7

Togni, Antonio. "What is Philosophy of Chemistry and Why is it Important." CHIMIA 77, no. 5 (May 31, 2023): 353. http://dx.doi.org/10.2533/chimia.2023.353.

Full text
Abstract:
Chemistry is a science fundamentally characterized by the ability of making its own study objects. Chemistry's unique sign language and representations of structural formulas are highly predictive tools. These aspects, together with the richness of qualitative models, make chemistry highly attractive for philosophical studies. However, philosophy of chemistry is, within the philosophy of science, a still relatively young discipline.
APA, Harvard, Vancouver, ISO, and other styles
8

Abu Zarga, Musa H. "Preface." Pure and Applied Chemistry 83, no. 9 (January 1, 2011): iv. http://dx.doi.org/10.1351/pac20118309iv.

Full text
Abstract:
It was a great honor for the University of Jordan to organize the 11th Eurasia Conference on Chemical Sciences (EuAsC2S-11), which was held at the Dead Sea, Jordan from 6 to 10 October 2010.The main objective of the Eurasia Conferences is to give young chemists and graduate students from developing countries the opportunity to meet and interact with eminent scientists from all over the world.The theme of the 11th Eurasia Conference, “ChemistryCares”, underlines the role of chemistry in society and the responsibility of chemists to improve our lives.The scientific program featured 12 plenary lectures, 108 invited lectures, 36 oral presentations, and more than 100 poster presentations. The topics covered the following major themes:Natural Products ChemistryPharmaceutical Chemistry and Drug DesignBioorganic ChemistryOrganic SynthesisHeterocyclic ChemistryBioinorganic and Inorganic ChemistryCoordination ProgrammingMaterials Science and NanochemistryRenewable Energy and Water ResearchPhysical and Computational ChemistryAnalytical ChemistryElectrochemistryMolecular Aspects of Liquids and SolutionsEducational ChemistryIn addition, there were 4 workshops, 5 panel discussions, and 5 scientific exhibitions.The conference was attended by 630 participants from 59 countries. Many of the participants were young chemists from Jordan and other developing countries who had the opportunity to meet and interact with prominent scientists from around the world, including three Nobel laureates.We are grateful to all who contributed to the success of the conference, especially the speakers and the national and international sponsors.Musa H. Abu ZargaConference Editor
APA, Harvard, Vancouver, ISO, and other styles
9

Roberts, Lissa. "Filling the Space of Possibilities: Eighteenth-Century Chemistry's Transition from Art to Science." Science in Context 6, no. 2 (1993): 511–53. http://dx.doi.org/10.1017/s0269889700001496.

Full text
Abstract:
The ArgumentThis paper charts eighteenth-century chemistry's transition from its definition as an art to its proclaimed status as a science. Both the general concept of art and specific practices of eighteenth-century chemists are explored to account for this transition. As a disciplined activity, art orients practitioners' attention toward particular directions and away from others, providing a structured space of possibilities within which their discipline develops. Consequently, while chemists throughout the eighteenth century aspired to reveal nature's “true voice,” the path of their investigations was directed by and toward their laboratory manipulations. So long as the chemical community maintained an ethos of polite cooperation and eschewed theoretical wrangling, this point was hidden by a rhetoric of “matter of fact” reporting. But as “facts” mounted in the 1770s and 1780s, especially in pneumatic chemistry, cooperation gave way to contention as chemists sought to name and organize their findings without the guidance of a communally accepted “natural” system. Lavoisier and his fellow “new” chemists offered a forceful solution to this dilemma by introducing a revolutionary network of theories, nomenclature, and instruments that unabashedly fused the productive manipulation of their laboratory work with what they claimed as the structure and activity of nature.
APA, Harvard, Vancouver, ISO, and other styles
10

Calis, Sevgul. "Recognition of the tools used in general chemistry laboratory of science teacher candidates and determination of their levels of knowledge." New Trends and Issues Proceedings on Humanities and Social Sciences 4, no. 1 (August 26, 2017): 175–80. http://dx.doi.org/10.18844/prosoc.v4i1.2252.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "SCIENCE / Chemistry / General"

1

Rodriguez, Christian. "Investigating the Impact of College-Level General Chemistry Curricula on General Chemistry Students' Conceptions of Organic Acidity and Oxidation-Reduction." Thesis, State University of New York at Stony Brook, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10932210.

Full text
Abstract:

Chemistry students have historically struggled with conceptually understanding organic acidity and oxidation-reduction. Previously dominant approaches towards remediating students? misconceptions has been challenged by Explanatory Coexistence, which eludes to a competition between conceptions held within individuals. Conceptual reprioritization may be associated with the restructuring of conceptual dominance hierarchies, which may occur once a conceptual competition concludes. Investigation of conceptual reprioritizations of general chemistry students? conceptions of organic acidity and oxidation-reduction performed across multiple demographics using Rasch analysis, student interviews and argumentation quality assessment. Student samples belonged to two different general chemistry courses that used different curricula. One used a reform-based curriculum, that compared to the traditional curriculum, focused on discussion and argumentation. Student conceptions were captured, and tracked via repeated measures, using the ACIDI and ROXCI concept inventories. Results indicated both inventories were capable of detecting conceptual reprioritizations after instruction from both curricula. Student achievement was consistent across multiple demographic characteristics. Evidence of argumentation quality and its association with conceptual reprioritizations of organic acidity and dominant, scientifically accepted redox conceptions was collected. Individual interviews suggested conceptual reprioritizations may be attributed to their respective curricula, while also adding insight into thought processes that arose while taking both inventories. Suggestions for future work is also discussed, highlighting the development of community standards, ACIDI and ROXCI responses databases to assess general student representation, and modification of both inventories.

APA, Harvard, Vancouver, ISO, and other styles
2

Clayton, Hayley J. "Synthesis and coordination chemistry of ligands for supramolecular chemistry and sensing applications." Thesis, University of Huddersfield, 2008. http://eprints.hud.ac.uk/id/eprint/6954/.

Full text
Abstract:
A series of multidentate N-donor ligands have been synthesised all containing pyridyl and pyridyl/thiazole units and their coordination behaviour is described. The ligands are classified into four types; i) terpyridine containing pyridyl/thiazole ligands (L1-3); ii) pyridyl/thiazole ligands containing a 3,3′-disubstituted bipyridine core. (L4-8); iii) 2,2′-bipyridine containing a crown ether moiety (L9-11); and iv) a 2,2′- bipyridine derived ligand containing a urea functional group in the 3,3′-positions (L12). Chapter II describes terpyridyl/pyridyl/thiazole ligands: - the synthesis of (L1-3) is described and the complexes ([Cu(L1)][ClO4]2, [Ni(L2)][ClO4]2, [Co(L2)][ClO4]2, [Cd3(L3)2][ClO4]6) structurally characterised. Partitioning of the ligands (L1-3) is dependant on the position of the thiazole ring within the ligand chain. This partitioning is found to occur at a position adjacent to that of the thiazole ring in all but the L2 ligand complexes, where it is partitioned preferentially at a position creating favourable coordination geometry for the metal ion. Chapter III describes 3,3′-disubstituted pyridyl/thiazole ligands (L4-8): - the novel potentially hexadentate ligands (L4, 5), the potentially octadentate ligand (L6) and the potentially tetradentate ligands (L7, 8) have been synthesized and structurally characterised. All ligands are found to partition at the central pyridine unit due to unfavourable steric interactions to form a pyridyl/thiazole/pyridyl-binding domain (L4-6) and the pyridyl/thiazole-binding domain (L7,8). The substituents are found to dominate the control of the formation of complexes produced ([Zn(L4)][ClO4]2, [Cd(L5)][ClO4]2, [Cd2(L6)2][ClO4]2, [Cd2(L8)2][ClO4]2). Chapter IV, Section 1 describes ditopic bipyridine/crown ether ligands: - the synthesis of (L9-11) is described and the Ru (II) complexes (L9-11) structurally characterised. The Ru(II) complexes of these 3,3′-disubstituted crown ether species were found to luminesce. Modulation of the luminescent properties of the ruthenium complex was investigated with a selection of common cations but resulted in little or no response. Chapter IV: - Section 2- Ditopic bipyridine/urea ligands: - the novel ligand containing urea substituent side chains (L12) has been synthesised and a ligand containing both pyridine and urea substituents has been synthesised and characterised. A ruthenium complex (X) was synthesised with ligand (L12) and (bipy)2RuCl2, the resulting structure confirmed via 1H & 13C NMR as well as electrospray mass spectrometry (ESI-MS). Unfortunately no complexes have been structurally characterised due to the instability and decomposition of the complex after a short period of time. The ruthenium complex however was found to luminesce; ligand/anion recognition studies with complex (X) and a selection of common anions showed a marked change, a ten fold increase in the luminescence was observed with the addition of H2PO4 - when in a non-aqueous solvent.
APA, Harvard, Vancouver, ISO, and other styles
3

Gorman, Stephen Anthony. "The chemistry of some di- and tri-phenylmethane dyes." Thesis, University of Central Lancashire, 1998. http://clok.uclan.ac.uk/7918/.

Full text
Abstract:
Two series of dyes have been prepared: a comprehensive series of novel, unsymmetrical Malachite Green type dyes containing different amino substituents in the 4-positions of the phenyl rings and a series of symmetrical Michier's Hydrol Blue type dyes. Both series of dyes have been synthesised from the relevant carbinols or hydrols. The amino substituents used were dimethylamino, diethylamino, pyrrolidino, piperidino, morpholino, thiomorpholino and N-methylpiperazino. The rates of ailcalirie hydrolysis of the dyes at various hydroxide ion concentrations and temperatures have been investigated with a view to elucidating the reaction mechanism and the nature of substituent effects. The rate data obtained for each dye studied have been used to obtain thermodynamic activation parameters and to test the applicability of an isokinetic relationship in the dye systems. The various methods of computation and their results have been compared and discussed in relation to literature data for similar dyes. A stopped-flow technique was used for the kinetic investigation of the fast reactions associated with the unstable dyes studied. The analysis of kinetic data using single substituent parameter regression techniques has enabled substituent constants for piperidine, thiomorpholine and N-methylpiperazine to be interpolated. The steric and electronic effects of the terminal amino substituents on the visible absorption spectra of the dyes have been examined in solvents of varying acidity. The steric and electronic symmetry of the Malachite Green type dyes has been investigated and is discussed. The results from the spectral investigation and the kinetic study indicate that diphenylmethane dyes are considerably less stable than the corresponding triphenylmethane dyes and the reasons for this behaviour are discussed. In addition, piperidino, morpholino, thiomorpholino and N-methylpiperazino are less able to stabilise a dye by electron donation than dimethylamino, diethylamino and pyrrolidino and the reasons for this behaviour are also discussed. The 'H and 13C nmr spectra of the dyes and carbinols have been recorded. Certain chemical shifts have been used to determine the relative electron donor ability of the terminal amino groups. The results from the 'H and 13C nmr spectra are discussed in relation to the steric and electronic effects of the heterocycic moieties.
APA, Harvard, Vancouver, ISO, and other styles
4

Phillips, Katherine Reece. "Sol-Gel Chemistry of Inverse Opals." Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:33493452.

Full text
Abstract:
Controlling nano to microscale structuration enables one to alter a material’s optical, wetting, mechanical, and chemical properties. Structuration on this scale can be formed from spherical building blocks; in particular, monodisperse, spherical colloids assemble into crystals that can be used to template an ordered, porous structure known as an inverse opal. The structure’s porosity and periodicity provide control over both light (photonic effects) and fluid flow (wetting effects). Controlling the composition allows chemical functionality to be added to the ordered, porous structure. Inverse opals are widely used in many applications that take advantage of these properties, including optical, wetting, sensing, catalytic, and electrode applications; however, high quality structures are necessary to maintain consistent properties. Many of their properties stem from the structure itself, so controlling inverse opals’ structure (including the local composition) provides the ability to control their properties, with the potential to improve some applications and potentially enable additional ones. This thesis explores how molecular precursors can be used to control colloidal assembly and therefore alter the optical and wetting properties of high quality inverse opals. Using a bio-inspired approach, highly ordered, crack-free, silica inverse opals can be grown by co-assembling the colloidal template with a sol-gel matrix precursor using evaporation-induced self-assembly. Using sol-gel chemistry, the size, shape, and charge of the precursor can be controlled, which can be used to tune the colloidal assembly process. Here, we use the sol-gel chemistry of the precursors to control both the morphology and composition of these photonic structures. In particular, temperature-induced condensation of the silica sol-gel matrix alters the shape of an inverse opal’s pores (Chapter 2), and silica and titania precursors can be mixed to make hybrid oxide structures (Chapter 3). Additionally, rationally designed precursors enable the fabrication of crack-free inverse opals in materials beyond silica, which we show for titania as a proof-of-concept (Chapter 4). By controlling the structure and composition with sol-gel chemistry, we can tailor both the optical and wetting properties, as discussed in the second part of each chapter; these properties have important effects for the various applications. In this way, sol-gel chemistry can be used to assemble inverse opals with complex functionality.
Chemistry and Chemical Biology
APA, Harvard, Vancouver, ISO, and other styles
5

Kapadia, Rasesh Dilranjan. "Applications of NMR imaging in materials science." Case Western Reserve University School of Graduate Studies / OhioLINK, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=case1055794721.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Aborways, Marwa M. "Oxidative bromination and ring expansion in organic chemistry." Thesis, University of Huddersfield, 2016. http://eprints.hud.ac.uk/id/eprint/30280/.

Full text
Abstract:
This thesis is composed of two independent research projects. The first major project discussed is electrophilic halogenation using inorganic halides in the presence of oxidant. This includes the conversion of tertiary propargyl alcohols in to α,α-dihaloketones. In addition, the oxidative bromination of a range of alkylbenzene derivatives using the inexpensive oxidant Oxone and sodium bromide is described with up to 4 C-H bonds being functionalised in this process. The second part of this thesis focuses on using silacyclobutanes in our aim to access new siliconcontaining chemical space. Silacyclobutanes are useful in organic synthesis because of their exciting reactivity based on their high Lewis acidity and ring strain. We describe our efforts at developing catalytic conditions for the Pd-mediated dimerisation of silacyclobutanes, as well as our preliminary results on the nickel-catalysed enantioselective ring expansion of benzosilacyclobutane with aldehydes. After Tamao-Fleming oxidation, this reaction produces extremely useful chiral benzylic alcohols.
APA, Harvard, Vancouver, ISO, and other styles
7

Alyazouri, Ayman. "Analytical chemistry and phytoextraction of hexavalent chromium with Portulaca oleracea." Thesis, University of Huddersfield, 2010. http://eprints.hud.ac.uk/id/eprint/9637/.

Full text
Abstract:
Phytoextraction in the UAE desert soil (sandy, calcareous, less than 0.5% humus, and pH 7.9) has been studied. Twelve suspected polluted sites were investigated for contamination with eight heavy metals and sixteen local plants from the UAE desert were evaluated for their ability to accumulate heavy metals. The soil of Ajman industrial zone demonstrated high amounts of total chromium (1800 mg/kg) and of hexavalent chromium (97 mg/kg) which is a significant environmental threat. Portulaca oleracea (Purslane) has been shown to be the best candidate for Cr(VI) accumulation. Total chromium concentration exceeded 4600 mg/kg in roots and 1400 mg/kg in stems confirming the role of P. oleracea as a Cr(VI) accumulator. More than 95% of the accumulated Cr(VI) was reduced to the less toxic Cr(III) within the plant. The uptake of Cr(VI) by this plant has been investigated. The uptake of Cr(VI) increased as its concentration in soil increased between 50 and 400 mg/kg. The highest Cr(VI) uptake was observed at the high pH and low organic matter content of soil confirming the phytoextraction efficiency of P. oleracea in soils found in the UAE. The uptake of Cr(VI) increased in the presence of sulfate anion (suggesting that chromate uses the same carriers of sulfate in root cells) while nitrate and phosphate retarded the uptake. Potassium and ammonium ions, but not sodium ions, enhanced the uptake of Cr(VI) confirming the effect of accompanying cations. EDTA enhanced the translocation factor of chromium from roots to shoots in plants irrigated with either Cr(III) or Cr(VI). HPLC-MS analysis showed that ascorbic acid is the main antioxidant that reduced Cr(VI) to Cr(III) which is then mostly translocated to shoots after chelation with organic acids such as oxalate since glutathione and phytochelatins were not observed at significant levels in the tissues of plants exposed to Cr(VI).
APA, Harvard, Vancouver, ISO, and other styles
8

Bright, Vivien Bianca. "Street canyon atmospheric composition : coupling dynamics and chemistry." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4414/.

Full text
Abstract:
A new model for the simulation of street canyon atmospheric chemical processing has been developed, by integrating an existing Large-Eddy Simulation (LES) dynamical model of canyon atmospheric motion with a detailed chemical reaction mechanism, the Reduced Chemical Scheme (RCS), comprising 51 chemical species and 136 reactions, based upon a subset of the Master Chemical Mechanism (MCM). The combined LES-RCS model is used to investigate both the effects of mixing and chemical processing upon air quality within an idealised street canyon. The effect of the combination of dynamical (segregation) and chemical effects is determined by comparing the outputs of the full LES-RCS canyon model with those obtained when representing the canyon as a zero-dimensional box model (i.e. assuming mixing is complete and instantaneous). The LES-RCS approach predicts lower (canyon-averaged) levels of NOX, OH and HO2, but higher levels of O3, compared with the box model run under identical chemical and emission conditions. Chemical processing of emissions within the canyon leads to a significant increase in the Ox flux from the canyon into the overlying boundary layer, relative to primary emissions, for the idealised case and a number of pollution scenarios considered. These results demonstrate that within-canyon atmospheric chemical processing can substantially alter the concentrations of pollutants injected into the urban canopy layer, compared with the raw emission rates within the street canyon and that such variations have a considerable effect on average within canyon concentrations and the flux of pollutants out of the canyon into the urban background environment.
APA, Harvard, Vancouver, ISO, and other styles
9

McDonald, Niall A. "Synthesis of novel redox-active building blocks for supramolecular and materials chemistry." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/1904/.

Full text
Abstract:
Supramolecular chemistry involves the study of noncovalent interactions that take place between molecules. A supramolecule or host-guest complex is formed when a noncovalentbinding or complexation event occurs between two such molecules. Hydrogen bonds, electrostatics, ?-stacking, hydrophobic effects and Van der Waals forces are all types of noncovalent interactions. The incorporation of redox active molecules into supramolecular systems is desirable, as they can be used as a convenient way of observing changes in a systems environment. This study involves the synthesis of a range of different redox active molecules, incorporated into supramolecular or materials devices. Firstly, two novel polymerisable flavin monomers have been synthesised. Attempts to polymerise these monomers, followed by characterisation to determine the physical and electronic properties were carried out. Secondly, a porphyrin system capable of binding to a flavin moiety has been prepared, and these complexes have been studied using physical and electrochemical techniques. This system offers an insight into the relationship between the porphyrin and flavin in nature. Furthermore, it would also serve to show how metals in close proximity to the flavin moiety can affect its supramolecular and electrochemical properties. A redox active ureidopyrimidinone system, capable of forming very strong dimer complexes, has been synthesised. This is able to tautomerise in solution, and using a combination of physical and electrochemical techniques, these supramolecular interactions have been studied. A polymer also displaying these properties has also been prepared and studied to understand the supramolecular properties it possesses. The results of this study will hopefully contribute significantly to the body of chemical research in the area of supramolecular and materials chemistry, with a variety of interesting results and scope for further expansion of these projects.
APA, Harvard, Vancouver, ISO, and other styles
10

Camp, Emma F. "Ecological and physiological responses of hard corals to variations in seawater carbonate chemistry." Thesis, University of Essex, 2015. http://repository.essex.ac.uk/15340/.

Full text
Abstract:
It is predicted that ocean acidification (OA) threatens coral reefs worldwide, by lowering seawater pH which in turn compromises essential metabolic processes such as carbonate genesis of corals. Inshore waters however, experience different spatial and temporal carbonate chemistry variability, raising questions over the future impact of OA within these habitats. It also remains unclear whether local biogeochemical conditions of some marine habitats can buffer, or provide a refuge against OA. The thesis systematically examines the response (ecological abundance, distribution, recruitment, and metabolic expenditure) of corals that have expanded their niche into variable pH habitats, to assess both the potential impact of OA and whether any habitats may act as a refuge against its effects by: (i) establishing robust methods to measure the local carbonate chemistry and the metabolic activity of corals in situ, (ii) characterising the natural carbonate chemistry variability over different temporal and spatial scales, and evaluating the biological versus abiotic control of non-reef habitats, (iii) quantifying the metabolic expenditure of corals living within non-reef habitats and assessing whether there are similarities in the physiological responses of corals existing in different regions to ascertain commonalities, and finally (iv) testing the impact of future predicted changes in temperature and pH on the physiological responses of corals from different variability habitats. The thesis demonstrates that across bioregion sites non-reef habitats exist that have highly variable carbonate chemistry but still house corals. These non-reef habitats have very different carbonate chemistry, influencing both their own susceptibility to future OA and their potential services (buffering versus pre-conditioning) for local coral populations. Future studies can expand on this work by assessing the molecular differences of corals found within these highly-variable habitats to explore further the potential of adaptation and/or acclimatisation of coral species to low pH.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "SCIENCE / Chemistry / General"

1

Whitten, Kenneth W. General chemistry. 5th ed. Forth [i.e. Fort] Worth: Saunders College Pub., 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

McQuarrie, Donald A. General chemistry. 2nd ed. Oxford: Freeman, 1987.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

McQuarrie, Donald A. General chemistry. 3rd ed. New York: W.H. Freeman and Co., 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Ebbing, Darrell D. General chemistry. 2nd ed. Boston: Houghton Mifflin, 1987.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Pauling, Linus. General chemistry. New York: Dover Publications, Inc., 1988.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

D, Gammon Steven, ed. General chemistry. 8th ed. New York: Houghton Mifflin Company, 2005.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

1949-, Wrighton Mark S., ed. General chemistry. 5th ed. Boston: Houghton Mifflin Company, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ebbing, Darrell D. General chemistry. 6th ed. Boston: Houghton Mifflin, 1999.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Ebbing, Darrell D. General chemistry. Edited by Wrighton Mark S. 1949-. 4th ed. Boston: Houghton Mifflin, 1993.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Ebbing, Darrell D. General chemistry. 4th ed. Boston: London, 1993.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "SCIENCE / Chemistry / General"

1

Jenkins, Dave Allen, and Diana Mason. "Gamification in General Chemistry." In Active Learning in College Science, 439–49. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-33600-4_27.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Demoranville, Leonard T., and Jeffrey E. Fieberg. "Developing the Evidence: Using the History of Science to Teach the Process of Science." In Chemistry in General Education, 95–110. Washington, DC: American Chemical Society, 2023. http://dx.doi.org/10.1021/bk-2023-1462.ch006.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Hawk, Jennifer L. "Say “Fromage”: Development and Implementation of a General Education Study Travel Science Course Focused on the Science of Cheese." In Chemistry in General Education, 35–48. Washington, DC: American Chemical Society, 2023. http://dx.doi.org/10.1021/bk-2023-1462.ch003.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Neiles, Kelly Y. "Scientific Storytelling: A First-Year Seminar Course Centered on Science Communication." In Chemistry in General Education, 151–61. Washington, DC: American Chemical Society, 2023. http://dx.doi.org/10.1021/bk-2023-1462.ch010.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Niaz, Mansoor, and Arelys Maza. "Nature of Science in General Chemistry Textbooks." In SpringerBriefs in Education, 1–37. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1920-0_1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Payton-Stewart, Florastina, Jayalakshmi Sridhar, and Richard Peters. "Development of Pedagogical Methods for Training Undergraduates in Skills of Science Communication to the Public." In Chemistry in General Education, 179–91. Washington, DC: American Chemical Society, 2023. http://dx.doi.org/10.1021/bk-2023-1462.ch012.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Sridhar, Jayalakshmi. "Undergraduate Core Course on Science Communication to the Public and Its Impact on Public Policy Creation." In Chemistry in General Education, 163–77. Washington, DC: American Chemical Society, 2023. http://dx.doi.org/10.1021/bk-2023-1462.ch011.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ellis, Arthur B. "General Chemistry as a Curriculum Pressure Point: Development ofTeaching General Chemistry: A Materials Science Companion." In Advances in Chemistry, 71–75. Washington, DC: American Chemical Society, 1995. http://dx.doi.org/10.1021/ba-1995-0245.ch011.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Niaz, Mansoor, and Bayram Coştu. "Analysis of Turkish General Chemistry Textbooks Based on a History and Philosophy of Science Perspective." In Critical Analysis of Science Textbooks, 199–218. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-4168-3_10.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Testa, Stephen M. "On Utilizing Forensic Science To Motivate Students in a First-Semester General Chemistry Laboratory." In ACS Symposium Series, 93–108. Washington, DC: American Chemical Society, 2019. http://dx.doi.org/10.1021/bk-2019-1324.ch006.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "SCIENCE / Chemistry / General"

1

Arifin, B. "GChem: Assisting students learning in general chemistry." In 2012 IEEE Symposium on Humanities, Science and Engineering Research (SHUSER). IEEE, 2012. http://dx.doi.org/10.1109/shuser.2012.6268865.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Tulegenova, G. A., A. B. Sagynbazarova, and K. SH Urasgaliev. "A lecture together as an innovative method in teaching toxicological chemistry." In General question of world science. Наука России, 2021. http://dx.doi.org/10.18411/gq-31-03-2021-43.

Full text
Abstract:
The article discusses the lecture method, together in the teaching of toxicological chemistry at the Department of Pharmaceutical Disciplines, which provides knowledge, the formation of skills and development of the students' value system, professional skills and competencies.
APA, Harvard, Vancouver, ISO, and other styles
3

Suyono, Suyono, Harun Nasrudin, and Bertha Yonata. "Chemical Education Student Science Process Skills, in Specific and in General Content." In Proceedings of the National Seminar on Chemistry 2019 (SNK-19). Paris, France: Atlantis Press, 2019. http://dx.doi.org/10.2991/snk-19.2019.47.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Jia, Linfang, and Dan Liang. "The Construction of General Chemistry Course in the New Media Era." In 2018 8th International Conference on Social science and Education Research (SSER 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/sser-18.2018.102.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Stoenoiu, Carmen Elena, and Lorentz Jäntschi. "A Computer Based Evaluation System: Design, Implementation and Results on General Chemistry." In 2023 International Conference on Computational Science and Computational Intelligence (CSCI). IEEE, 2023. http://dx.doi.org/10.1109/csci62032.2023.00282.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Purba, Jamalum, Harvei Desmon Hutahaean, and Freddy Tua Musa Panggabean. "E-Learning General Chemistry Learning (Stoichiometry) Based on Computer Based Test." In Proceedings of the 4th International Conference on Innovation in Education, Science and Culture, ICIESC 2022, 11 October 2022, Medan, Indonesia. EAI, 2022. http://dx.doi.org/10.4108/eai.11-10-2022.2325497.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Purba, Jamalum, Freddy Tua Musa Panggabean, Ani Sutiani, and Adi Widarma. "Development of general chemistry teaching materials in integrated network based on high order thinking skills." In THE 8TH ANNUAL INTERNATIONAL SEMINAR ON TRENDS IN SCIENCE AND SCIENCE EDUCATION (AISTSSE) 2021. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0114422.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Pahlawan, Muhammad Fahri Reza, and Rudiati Evi Masithoh. "Vis-NIR Spectroscopy and PLS-Da Model for Classification of Arabica and Robusta Roasted Coffee Bean." In Life Science, Materials and Applied Chemistry. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/p-60bbc9.

Full text
Abstract:
Visible-Near Infrared (Vis-NIR) spectroscopy combined with partial least squares discriminant analysis (PLS-DA) was used to classify Arabica and Robusta roasted coffee beans. The number of coffee beans analyzed was 200 samples consisting of 5 origins (Flores, Temanggung, Aceh Gayo, Jawa, and Toraja). Reflectance spectra with a wavelength of 450-950 nm were used to build two types of models, namely single-origin and general models. Single-origin Flores, Temanggung, Aceh Gayo, and Toraja models performed very well to classify coffee beans samples from the same origin with Sen, Spe, Acc, and Rel of 1, as well as TFN and TFP of 0. General PLS-DA model with baseline correction pretreatment yields Sen, Spe, Acc, and Rel of 0.97, as well as TFN and TFP of 0.04. Based on this paper, it was concluded that Vis-NIR combined with PLS-DA perform well in classifying roasted coffee beans based on the variety.
APA, Harvard, Vancouver, ISO, and other styles
9

Zhang, Lizhu, and Dongyan Tang. "Exploration on the Flipped Classroom Teaching Mode on General Chemistry of International Students." In 2017 2nd International Conference on Education, Management Science and Economics (ICEMSE 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/icemse-17.2017.46.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Sugiharti, Gulmah, Abdul Hamid, and Mukhtar Mukhtar. "Improvement of Learning Outcomes by Direct Instruction (DI) Learning Model in General Chemistry Course." In Proceedings of The 5th Annual International Seminar on Trends in Science and Science Education, AISTSSE 2018, 18-19 October 2018, Medan, Indonesia. EAI, 2019. http://dx.doi.org/10.4108/eai.18-10-2018.2287302.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "SCIENCE / Chemistry / General"

1

Mehta, Goverdhan, Alain Krief, Henning Hopf, and Stephen A. Matlin. Chemistry in a post-Covid-19 world. AsiaChem Magazine, November 2020. http://dx.doi.org/10.51167/acm00013.

Full text
Abstract:
The long-term impacts of global upheaval unleashed by Covid-19 on economic, political, social configurations, trade, everyday life in general, and broader planetary sustainability issues are still unfolding and a full assessment will take some time. However, in the short term, the disruptive effects of the pandemic on health, education, and behaviors and on science and education have already manifested themselves profoundly – and the chemistry arena is also deeply affected. There will be ramifications for many facets of chemistry’s ambit, including how it repositions itself and how it is taught, researched, practiced, and resourced within the rapidly shifting post-Covid-19 contexts. The implications for chemistry are discussed hereunder three broad headings, relating to trends (a) within the field of knowledge transfer; (b) in knowledge application and translational research; and (c) affecting academic/professional life.
APA, Harvard, Vancouver, ISO, and other styles
2

Peters, Vanessa, Deblina Pakhira, Latia White, Rita Fennelly-Atkinson, and Barbara Means. Designing Gateway Statistics and Chemistry Courses for Today’s Students: Case Studies of Postsecondary Course Innovations. Digital Promise, August 2022. http://dx.doi.org/10.51388/20.500.12265/162.

Full text
Abstract:
Scholars of teaching and learning examine the impacts of pedagogical decisions on students’ learning and course success. In this report, we describes findings from case studies of eight innovative postsecondary introductory statistics and general chemistry courses that have evidence of improving student completion rates for minoritized and low-income students. The goal of the case studies was to identify the course design elements and pedagogical practices that were implemented by faculty. To identify courses, Digital Promise sought nominations from experts in statistics and chemistry education and reviewed National Science Foundation project abstracts in the Improving Undergraduate STEM Education (IUSE) program. The case studies courses were drawn from 2- and 4-year colleges and were implemented at the level of individual instructors or were part of a department or college-wide intervention. Among the selected courses, both introductory statistics (n = 5) and general chemistry (n = 3) involved changes to the curriculum and pedagogy. Curricular changes involved a shift away from teaching formal mathematical and chemical equations towards teaching that emphasizes conceptual understanding and critical thinking. Pedagogical changes included the implementation of peer-based active learning, formative practice, and supports for students’ metacognitive and self-regulation practices.
APA, Harvard, Vancouver, ISO, and other styles
3

Liu, Cheng-Hsin, Ha L. Nguyen, and Omar M. Yaghi. Reticular Chemistry and Harvesting Water from Desert Air. AsiaChem Magazine, November 2020. http://dx.doi.org/10.51167/acm00007.

Full text
Abstract:
Although chemists, in general, are concerned with the art and science of constructing molecules and understanding their behavior, for a long time the idea that such molecules can be linked together by strong bonds to make infinite, extended structures were fraught with failure. The notion of using molecular building blocks to make such structures invariably led to chaotic, ill-defined materials and therefore not only defying the chemists’ need to exert their will on the design of matter but also preventing them from deciphering the atomic arrangement of such products. The field remained undeveloped for most of the twentieth century, and it was taken as an article of faith that linking molecules by strong bonds to make extended structures is a “waste of time” because “it doesn’t work.”
APA, Harvard, Vancouver, ISO, and other styles
4

Keinan, Ehud. The 18th Asian Chemical Congress and the 20th General Assembly of the FACS. AsiaChem Magazine, November 2020. http://dx.doi.org/10.51167/acm00015.

Full text
Abstract:
Most global challenges, including global warming, food for everybody, the race for sustainable energy, water quality, dwindling raw materials, and health problems, are chemical problems by nature. Therefore, Humankind cannot meet these challenges without the chemical sciences and will not solve any of these problems without global cooperation. Chemists have always been doing much better than politicians in meeting these challenges, working together across borders through unique collaboration and friendship. Despite fundamentally different political systems and cultural diversity, chemists go beyond borders, find each other, share their findings, and solve problems together.
APA, Harvard, Vancouver, ISO, and other styles
5

LeDuc, Jamie, Ryan Maki, Tom Burri, Joan Elias, Jay Glase, Brenda Moraska Lafrancois, Kevin Peterson, David Vandermeulen, and Ben Vondra. Voyageurs National Park interior lakes status and impact assessment. National Park Service, February 2022. http://dx.doi.org/10.36967/nrr-2289923.

Full text
Abstract:
Voyageurs National Park (VNP) is a water-based park that includes part or all of four large lakes and twenty-six smaller lakes commonly referred to as “interior lakes”. The 26 interior lakes of VNP are important aquatic resources with differing size and depth, water chemistry, trophic status, fish communities, and visitor use. Despite the remote location of these lakes, they have been impacted by multiple stressors, including contaminants and non-native species. This assessment provides key information in support of a science-based management plan for these lakes. The objectives of this assessment were to: 1) assess the status of each of the interior lakes and categorically rank the lakes from least to most impacted; 2) use the results to make specific science-based management and restoration recommendations for the most impacted lakes; and 3) make general recommendations that may be useful in managing all of Voyageurs National Park’s interior lakes. When all factors considered in this analysis (water quality, fish mercury concentrations, and fish community characteristics) were combined and assessed, thirteen lakes were classified as most impacted, nine as moderately impacted, and three as least impacted. Although nearly half of the lakes were classified as most impacted in this assessment, many of these lakes are in excellent condition compared to other lakes in the region. The factor-by-factor impact status of the lakes was considered to help describe the condition of the lakes and the potential for restoration. No local management options were identified to mitigate the mercury contamination in these lakes as research has shown the sources of the contamination to arrive from regional and global sources. Similarly, no management actions were identified to reduce nutrient concentrations in the lakes ranked most impacted for nutrient conditions as these are remote lakes with minimal or no development within their watersheds, and it was also noted that paleolimnological studies have shown that the nutrient status of the interior lakes was relatively unchanged from pre-European settlement conditions. Finally, for the lakes in which presumed introduced fish species are present, piscicides were considered as a potential management action. Piscicides were not recommended as a strategy to eradicate introduced fish species as it was determined that genetic conservation of the populations of native fish species still present in these lakes was more valuable than eradicating the introduced species.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'SCIENCE / Chemistry / General' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography