Department Of Physical Chemistry Research Articles

Recent Progress on Combustion Characteristics of Ammonia-Based Fuel Blends and Their Potential in Internal Combustion Engines

Review Recent Progress on Combustion Characteristics of Ammonia-Based Fuel Blends and Their Potential in Internal Combustion Engines Denghao Zhu , and Bo Shu * Department of Physical Chemistry, Physikalisch-Technische Bundesanstalt, Bundesallee 100, DE-38116 Braunschweig, Germany * Correspondence: bo.shu@ptb.de Received: 21 November 2022 Accepted: 22 December 2022 Published: 18 January 2023 Abstract: Ammonia has recently attracted numerous attentions from researchers and policy makers as promising energy and hydrogen carrier for mitigating the carbon footprints in the energy sector. The mature infrastructure for the production, storage, and transportation of ammonia allows a quick role of ammonia in energy systems. By applying green hydrogen and renewable energies, green ammonia can be produced, which makes ammonia even more attractive. Prior to the commercial use of ammonia for large-scale energy systems, e.g., internal combustion engines and stationary gas turbines, a fundamental understanding of the ignition and combustion behaviors of ammonia is essential. In the past decades, a lot of studies on ammonia combustion have been published. Those studies covered broad topics including experimental and numerical investigations which were either fundamental or practical oriented. To continuously follow state-of-the-art and to provide a brief overview of the most recent research on ammonia combustion so that others can easily identify the most relevant work, this review summarizes the recent progress on combustion characteristics of ammonia and ammonia fuel blends as well as their potential use in internal combustion engines. Combining the advantages and drawbacks identified in both fundamental and practical studies, a clearer road map for ammonia application is given.

Department of Physical Chemistry, School of Chemical Sciences, University of Madras, Chennai 600 025, Tamilnadu, India

Department of Physical Chemistry, School of Chemical Sciences, University of Madras, Chennai 600 025, Tamilnadu, India

In memoria of professor Dmytro Bilotsky

On April 30, 2020, on the 102nd year of his life, Doctor of Chemical Sciences Dmytro Petrovych Bilotsky passed away in Australia. Professor Bilotsky D. P. - a man of heroic and difficult destiny. He was born on November 8, 1918 and came from a poor Ukrainian peasant family, which together with the whole village moved to Siberia in tsarist times. His parents died in 1921 during a famine, and the three-year-old boy was first adopted by his brother, who lived in the same village. In the turbulent years of the formation of Soviet Union and the “dekulakization” of hard-working peasants, Dmytro moved from Siberia to Kyrgyzstan. After graduating from the Geotopographic College in Bishkek, he served in the Red Army and was to retire in 1941. But the war was on the border… During the war, Dmytro Petrovych lost his leg at the front. Back in 1944, he entered the Faculty of Chemistry of Chernivtsi University, then after three years of graduate school at the Department of Physical Chemistry, he completed and later defended his dissertation in Kharkiv. In 1956 he was appointed as head of the Department of Inorganic Chemistry. He later became an associate professor, and in the 1960s he began working on his own doctoral dissertation, which he defended in 1972 in Moscow and became a professor. He retired at age 70 and later moved with his family to Australia. Choosing a scientific topic for the department, Dmytro Petrovych focused on a promising new direction - semiconductor chemistry. This was a time when people began to use semiconductors in various devices. The first practically used semiconductor substances were mainly simple substances, such as germanium, tellurium, and silicon, but later it became known that some compounds also have semiconductor properties. For potential practical use, it was necessary to synthesize new semiconductor compounds. Dmytro Petrovych was able to predict the prospects of his chosen scientific direction. He sought and soon established scientific connections with the best specialists in this field. And already from the end of the 50's he established scientific contacts with such authorities of semiconductor chemistry in the USSR. His works were included in textbooks ("Introduction to the Chemistry of Semiconductors" by Ugay), monographs by Chizhikov and Shchaslyvii "Tellurium and Tellurides", "Selenium and Selenides", Prochukhan's "Triple Systems". The list of publications includes 241 scientific papers. Dmytro Petrovych was the supervisor of dozens of diploma theses and 10 candidate dissertations (PhD). Many graduates of the department have already become candidates and doctors of sciences. Dmytro Petrovych possessed many features of character that attracted students and staff of the department: high culture, patience, politeness… We all respected and loved him for his diligence, wisdom, erudition, principled news, justice, modesty, sensitivity, and kindness. As long as we are, we will remember him as a Man with a capital letter.

THE ROLE OF SURFACTANTS IN LIQUID SOAPS AND ITS ANTIMICROBIAL PROPERTIES

22Dec 2019 THE ROLE OF SURFACTANTS IN LIQUID SOAPS AND ITS ANTIMICROBIAL PROPERTIES S. Nazdrajic and A. Bratovcic Senior Assistant, Faculty of Education, University Dzemal Bijedic in Mostar, University Campus bb, 88000 Mostar, Bosnia and Herzegovina Associate Professor, Department of Physical Chemistry and Electrochemistry, Faculty of Technology, University of Tuzla, Univerzitetska 8, 75000 Tuzla, Bosnia and Herzegovina

Current Trends in Semiconductor Photoelectrochemistry

ADVERTISEMENT RETURN TO ISSUEPREVEnergy FocusNEXTCurrent Trends in Semiconductor PhotoelectrochemistryCsaba Janáky*†‡ and Krishnan Rajeshwar§View Author Information† Department of Physical Chemistry and Materials Science, University of Szeged, Szeged 6720, Hungary‡ MTA-SZTE “Lendület” Photoelectrochemistry Research Group, Rerrich Square 1, 6720 Szeged, Hungary§ Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, Texas 76019, United StatesCite this: ACS Energy Lett. 2017, 2, 6, 1425–1428Publication Date (Web):May 22, 2017Publication History Received15 May 2017Accepted16 May 2017Published online22 May 2017Published inissue 9 June 2017https://doi.org/10.1021/acsenergylett.7b00413Copyright © 2017 American Chemical SocietyRIGHTS & PERMISSIONSArticle Views3703Altmetric-Citations7LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (5 MB) Get e-AlertsSUBJECTS:Electrodeposition,Electrodes,Photonics,Semiconductors Get e-Alerts

Historia Ogrodu Botanicznego Uniwersytetu Stefana Batorego w Wilnie (1919–1939)

Historia Ogrodu Botanicznego Uniwersytetu Stefana Batorego w Wilnie (1919–1939)

Erratum: Insight into the template effect of vesicles on the laccase-catalyzed oligomerization of N-phenyl-1,4-phenylenediamine from Raman spectroscopy and cyclic voltammetry measurements.

Scientific Reports 6: Article number: 30724; published online: 26 August 2016; updated: 07 October 2016 In the original version of this Article, Peter Walde was incorrectly affiliated with: University of Belgrade-Faculty of Pharmacy, Department of Physical Chemistry and Instrumental Methods, VojvodeStepe 450, 11221 Belgrade, Serbia.

Comment on “Observation of the Marcus Inverted Region for Bimolecular Photoinduced Electron-Transfer Reactions in Viscous Media”

ADVERTISEMENT RETURN TO ISSUEPREVCommentNEXTComment on “Observation of the Marcus Inverted Region for Bimolecular Photoinduced Electron-Transfer Reactions in Viscous Media”Gonzalo Angulo*†, Arnulf Rosspeintner‡, Marius Koch§, and Eric Vauthey‡View Author Information† Institute of Physical Chemistry, Polish Academy of Sciences, 44/52 Kasprzaka, 01-224 Warsaw, Poland‡ Department of Physical Chemistry, University of Geneva, 30 Quai Ernest Ansermet, CH-1211 Geneva, Switzerland§ Department of Chemistry, Princeton University, 08540 Princeton, New Jersey, United States*G. Angulo. Fax: +48 22 343 33 33. Tel: +48 22 343 20 86. E-mail: [email protected]Cite this: J. Phys. Chem. B 2016, 120, 36, 9800–9803Publication Date (Web):August 18, 2016Publication History Received1 July 2016Revised24 July 2016Published online30 August 2016Published inissue 15 September 2016https://doi.org/10.1021/acs.jpcb.6b06610Copyright © 2016 American Chemical SocietyRIGHTS & PERMISSIONSArticle Views937Altmetric-Citations5LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (495 KB) Get e-AlertsSUBJECTS:Aromatic compounds,Kinetic parameters,Solvents,Transfer reactions,Viscosity Get e-Alerts

From toothpaste to "implant-paste": A new product for cleaning dental implants

Event Abstract Back to Event From toothpaste to "implant-paste": A new product for cleaning dental implants Ashwaq A. Al-Hashedi1, 2*, Marco Laurenti3* and Faleh Tamimi1* 1 McGill University, Faculty of Dentistry, Canada 2 Sana'a University, Department of Prosthodontic Dentistry, Yemen 3 Complutense University of Madrid, Department of Physical Chemistry, Spain Oral biofilm can accumulate onto the surface of dental implants causing infection and compromising implant survival. Available prophylaxis and toothpastes present limited efficiency in cleaning implant surfaces because they were all originally designed for cleaning teeth not implants. In fact, they are made of organic thickeners and surfactants that could bind to titanium and alter its properties. Prophylaxis pastes completely inorganic in composition could be more effective in cleaning dental implants than organic–based toothpastes. We discovered a new class of inorganic colloidal suspensions with extreme thixotropic behaviour. They are biocompatible and have rheological properties suitable for prophylaxis paste thickening agents. Objectives: This study aimed at developing a prophylaxis paste optimized for cleaning dental implants while preserving their surface integrity ʺthe first implant-pasteʺ. Methods: The implant-paste was developed by combining an inorganic thickening agent made of a nanocrystalline colloidal suspension (Nanocrystalline Magnesium Phosphate) and polishing nanoparticles of hydrated silica. The implant-paste formulation was optimized to decontaminate titanium surfaces coated with oral biofilm and compared to a commercial toothpaste (Colgate; Colgate-Palmoliven, USA). Surface morphology, bacterial attachment and chemical properties of titanium surfaces were analyzed and comparisons between different products were done using one-way ANOVA and independent samples t tests. Results: Optimized inorganic prophylaxis paste made of nanocrystalline magnesium phosphate gel (10% w/w) and (30% w/w) hydrated silica was superior to brushing alone and Colgate toothpaste in removing titanium surfaces contaminants and it did not cause surface alteration. The thixotropic and inorganic nature of the nanocrystalline magnesium phosphate implant-paste is ideal for cleaning implant surfaces because unlike the Colgate toothpaste it does not contain organic-based thickeners that adhere tightly on titanium surfaces and change their surface chemistry. Conclusion: A prophylaxis paste based on inorganic thickening agent is more efficient in decontaminating implant surfaces than a commercial toothpaste with organic thickening agents. Keywords: Implant, Clinical relevance, gel, Novel material Conference: 10th World Biomaterials Congress, Montréal, Canada, 17 May - 22 May, 2016. Presentation Type: Poster Topic: Biomaterials in dental applications Citation: Al-Hashedi AA, Laurenti M and Tamimi F (2016). From toothpaste to "implant-paste": A new product for cleaning dental implants. Front. Bioeng. Biotechnol. Conference Abstract: 10th World Biomaterials Congress. doi: 10.3389/conf.FBIOE.2016.01.02126 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 27 Mar 2016; Published Online: 30 Mar 2016. * Correspondence: Dr. Ashwaq A Al-Hashedi, McGill University, Faculty of Dentistry, Montreal, QC, Canada, ashwaq.al-hashedi@mail.mcgill.ca Dr. Marco Laurenti, Complutense University of Madrid, Department of Physical Chemistry, Madrid, Spain, marco.laurenti@mcgill.ca Dr. Faleh Tamimi, McGill University, Faculty of Dentistry, Montreal, QC, Canada, faleh.tamimimarino@mcgill.ca Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Ashwaq A Al-Hashedi Marco Laurenti Faleh Tamimi Google Ashwaq A Al-Hashedi Marco Laurenti Faleh Tamimi Google Scholar Ashwaq A Al-Hashedi Marco Laurenti Faleh Tamimi PubMed Ashwaq A Al-Hashedi Marco Laurenti Faleh Tamimi Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.

Hydrogel and bacterial cellulose mats behavior with calcium phosphate deposition.

Event Abstract Back to Event Hydrogel and bacterial cellulose mats behavior with calcium phosphate deposition. Paula Braga Daltro1, Gildásio De Cerqueira Daltro2, Gabriel Molina De Olyveira1, Pierre Basmaji3 and Antônio Carlos Guastaldi1 1 IQ-UNESP/Brazil, Department of Physical Chemistry, Brazil 2 UFBA, College Hospital Complex Prof. Edgard Santos (COM-HUPES), Brazil 3 Innovatec's - Biotechnology Research and Development, Biotechnology Research and Development, Brazil Bacterial cellulose (BC) has become established as a remarkably versatile biomaterial and can be used in a wide variety of applied scientific applications, especially for medical devices . Although it’s hydrogel form is it’s natural form, the dehydrated membrane has been focus in research worldwide. This work aims to compare the differences in both bacterial cellulose conditions related of calcium phosphate deposition. Kokubo’s methodology based on a simulated body fluid(SBF) to mimic the calcium phosphate in the blood was used for incorporation of calcium phosphate in Bacterial cellulose. Thermal Analysis, Scanning Electron microscopy, and X-ray diffraction were used to better note the differences between the previously water stateted BC and the dry up state.Thermal analysis show considerable discrepancies when exposed to a heating increase of 10°C/min. A difference is also noted in DSC with the amount of heat injected to the samples. SEM shows a different fiber organization where the hydrogel has closer fibers than the dry membrane. X-ray diffraction shows higher differences in crystallinity, bacterial cellulose mats clearly is amorphous while hydrogel show much clearer peaks and better calcium phosphate phase definition. UNESP-IQ-Chemistry Institute; Innovatec´s-Biotechnology Research and Development.

Reply to “Comment on ‘Determination of Nucleus Density in Semicrystalline Polymers from Nonisothermal Crystallization Curves’”

ADVERTISEMENT RETURN TO ISSUEPREVCommentNEXTReply to “Comment on ‘Determination of Nucleus Density in Semicrystalline Polymers from Nonisothermal Crystallization Curves’”Alfréd Menyhárd*Alfréd MenyhárdLaboratory of Plastics and Rubber Technology, Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, Műegyetem rakpart 3. H/1, H-1111 Budapest, HungaryInstitute of Materials Science and Environmental Chemistry, Research Center for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary*E-mail [email protected] (A.M.).More by Alfréd Menyhárd, Márton BredácsMárton BredácsInstitute of Materials Science and Environmental Chemistry, Research Center for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, HungaryMore by Márton Bredács, Gergely SimonGergely SimonInstitute of Materials Science and Environmental Chemistry, Research Center for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, HungaryMore by Gergely Simon, and Zsuzsanna HorváthZsuzsanna HorváthLaboratory of Plastics and Rubber Technology, Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, Műegyetem rakpart 3. H/1, H-1111 Budapest, HungaryInstitute of Materials Science and Environmental Chemistry, Research Center for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, HungaryMore by Zsuzsanna HorváthCite this: Macromolecules 2015, 48, 20, 7735Publication Date (Web):October 8, 2015Publication History Received22 September 2015Accepted29 September 2015Published online8 October 2015Published inissue 27 October 2015https://doi.org/10.1021/acs.macromol.5b02051Copyright © 2015 American Chemical SocietyRIGHTS & PERMISSIONSArticle Views446Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (135 KB) Get e-AlertsSUBJECTS:Chemical calculations,Crystallization,Kinetic modeling,Nucleation Get e-Alerts

The Effect of Activation Method on the Adsorption Performance of Saw-Dust Activated Carbon

Aims: The present study was conducted to evaluate the ability of modified saw dust to remove para - nitrophenol (PNP) from aqueous solution. Metho dology: Batch adsorption studies were carried out under varying conditions of initial pH, contact time and temperature . The performance of saw dust activated carbon was characterized by BET surface area FTIR and SEM. Three simplified kinetic models including pseudo - first order, pseudo - second order and intra particle diffusion were selected to follow the adsorption process. P lace and Duration of Study : Experiments were carried out in the National Rese arch Center, Department of Physical Chemistry at laboratory of Surface Chemistry and Catalysis. Study Design : The adsorption abilities of saw dust after thermal and chemical treatment were investigated for its efficiency in removing para - nitrophenol (PNP) from aqueous solution. Results: The Langmuir, Freundlich and Temkin models were used to describe the adsorption equilibrium studies of saw dust activated carbon. Results showed that the Langmuir isotherm showed better fit than Freundlich and Temkin isother m. The kinetic data were found to follow the pseudo - second order model. Intraparticle diffusion is not the sole rate controlling factor. The

Allen Joseph Bard—a tribute on the occasion of his 80th birthday

With this Festschrift issue of the Journal of Solid State Electrochemistry, we bow before Allen Joseph Bard, the outstanding scientist and educator, the great electrochemist, and bright intellectual. We celebrate his 80th birthday which gives an excellent opportunity to express our high esteem to Allen, a superb and innovative researcher on behalf of the community of electrochemists and electroanalytical chemists. Allen Joseph Bard is Hackerman-Welch Regents Chair Professor of chemistry and director of Center for Electrochemistry at the University of Texas at Austin. Born on December 18, 1933 in New York City, he started his studies at the City College of New York, and got his summa cum laude B.Sc. degree in chemistry, in 1955. He continued his studies in chemistry at Harvard University, obtained both M.A. in 1956 and Ph.D. degrees in chemistry in 1958, where James J. Lingane, then a leading researcher in the field of electroanalytical chemistry, was his mentor. He started to work at the University of Texas in 1958, and became a professor there in 1967. It is certainly not easy to summarize all the activities and achievements of Professor Bard. This would require a whole book or at least a complete volume of the journal. He is the author of more than 900 research papers, the number of citation of his works is more than 50,000, his Hirsch index is 120. He is 11th in the recent Hirsch index list of all chemists. Those are just the actual numbers in the beginning of the year 2013, because in the last 3 years, his citation number was ca. 3,000 in each year. He also has 24 patents. And Al is still very active, continues to publish papers (e.g., 26 in 2012 alone!), writes, and edits books. The organizers of any conference are happy to invite him to present plenary lectures and research talks since he always attracts a large audience.We had the great pleasure of working with Allen on the Electrochemical Dictionary (Springer) that first appeared in 2008, and the second, revised edition in 2012 enjoying his wise advices, profound knowledge, and meticulous checking of all entries. He wrote excellent books: Chemical Equilibrium, Electrochemical Methods—Fundamental and Application with L.R. Faulkner and Integrated Chemical Systems: A Chemical Approach to Nanotechnology. The ’Bard-Faulkner’ (1980, 2nd edition 2001) is on the bookshelf of practically every electrochemist, and has been used in teaching courses for thousands of graduate students. Prof. Bard edited several book series including Electroanalytical Chemistry, Encyclopedia of the Electrochemistry of Elements, Encyclopedia of Electrochemistry (with M. Stratmann), and a fundamental book: Standard Potentials in Aqueous Solutions (with R. Parsons and J. Jordan). Allen Bard pioneered the development of the scanning electrochemical microscope, which allows for high-resolution chemical imaging of surfaces and the study of chemical G. Inzelt (*) Department of Physical Chemistry, Institute of Chemistry, Eotvos Lorand University, Pazmany Peter setany 1/A, 1117 Budapest, Hungary e-mail: inzeltgy@chem.elte.hu

Functionalization of Graphene: Covalent and Non-Covalent Approaches, Derivatives and Applications

ADVERTISEMENT RETURN TO ISSUEPREVReviewFunctionalization of Graphene: Covalent and Non-Covalent Approaches, Derivatives and ApplicationsVasilios Georgakilas†, Michal Otyepka‡, Athanasios B. Bourlinos‡, Vimlesh Chandra§, Namdong Kim§, K. Christian Kemp§, Pavel Hobza‡§⊥, Radek Zboril*‡, and Kwang S. Kim*§View Author Information† Institute of Materials Science, NCSR “Demokritos”, Ag. Paraskevi Attikis, 15310 Athens, Greece‡ Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic§ Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, Korea⊥ Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic*R.Z.: e-mail address [email protected]; telephone +420-58-563-4947; fax +420-58-563-4958. K.S.K.: e-mail address [email protected]; telephone +82-54-279-2110; fax +82-54-279-8137.Cite this: Chem. Rev. 2012, 112, 11, 6156–6214Publication Date (Web):September 25, 2012Publication History Received31 January 2012Published online25 September 2012Published inissue 14 November 2012https://doi.org/10.1021/cr3000412Copyright © 2012 American Chemical SocietyRIGHTS & PERMISSIONSACS AuthorChoiceArticle Views151245Altmetric-Citations3073LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (78 MB) Get e-AlertsSUBJECTS:Composites,Functionalization,Nanoparticles,Oxides,Two dimensional materials Get e-Alerts

Synthesis, and Structural and Thermal Characterizations of Tetrasulfonated Poly(arylene biphenylsulfone ether) Copolymer Ion Conducting Electrolytes

Department of Physical Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai, IndiaReceived September 14, 2011, Accepted September 21, 2011High molecular weight tetrasulfonated poly(arylene biphenylsulfone ether) (TsPBPSEH) copolymers contain-ing up to four pendant sulfonate groups per repeat unit were synthesized via aromatic nucleophilic displacementcondensation from 4,4'-bis(4-chloro-3-sulfonatophenylsulfonyl)biphenyl-2,2'-disulfonate (SBCSBPD), 4,4'-dichlorodiphenylsulfone (DCDPS) and 4,4'-(hexafluoroisopropylidene)diphenol (6F-BPA). The synthesizedcopolymers were structurally characterized using

The Active Constituents of the Vegetable Purgatives Containing Anthracene Derivatives

Summary A review of the published theories which seek to account for the activity of purgative drugs containing anthracene derivatives is given. The relative activity of anthracene derivatives occurring as (a) glycosides, (b) anthranols and (c) anthraquinones, in certain crude drugs has been determined by biological means. A similar investigation of isolated glycosides, anthranols and anthraquinones has been carried out. The results show that the anthracene derivatives are highly active as anthranol glycosides; less active as free anthranols and much less active as free anthraquinones. The more complex aglycone (dianthranol) of sennoside A is more active than the simple anthranol of aloe emodin. The theory is advanced that the sugar moiety of the glycoside not only acts as a “transporter” of the active aglycone, enabling it to reach the large intestine, but is also a “protector” which prevents oxidation of the aglycone to the relatively (orally) inactive anthraquinone. The experiments also show that a determination of “total anthraquinones” irrespective of their form of occurrence will be no guide to biological activity. Further work on the glycoside fraction of these crude drugs is being carried out. I would like especially to thank Mr. T. C. Lou for performing all the bio-assays included in this paper, for preparing the pure anthracene compounds and for much valuable assistance and many useful suggestions during the course of the work. I am also grateful to the Pharmacology Department of this School for facilities for carrying out the bio-assays; and to the Department of Physical Chemistry for the loan of certain spectrophotometric equipment necessary for the colorimetric assays. Acknowledgments are made to Sandoz Products Ltd.*** for the gift of sennosides A and B, and to Mr. A. H. Fenton for the preliminary biological work.

Physical Chemistry at the University of Geneva.

A brief historical overview of physical chemistry at the University of Geneva as well as a description of the present research activities at the department of physical chemistry are presented.

Ronald Harry Ottewill OBE FRS. 8 February 1927 — 4 June 2008

Ron Ottewill was educated at Southall County School and at Queen Mary College, London, where he obtained a first-class honours degree in chemistry and then a PhD, under the supervision of Dr D. C. Jones. He moved to Cambridge (Fitzwilliam College) in 1952 on a Nuffield Fellowship, and joined the famous Colloid Science Department, which had been founded by Eric Rideal FRS. There Ron worked with Paley Johnson on antibody–antigen interactions, before becoming an assistant director of research in 1958. After a six-month spell in Theo Overbeek's laboratory in Utrecht during 1956, Ron's research interests turned to what was to become his main research theme over the years, namely the preparation, characterization and properties of model colloidal dispersions. In particular, he became interested in the interactions between particles, which underpin the stability of particulate dispersions. In 1964 Ron Ottewill was invited to move to Bristol University, in the main to set up a new one-year postgraduate MSc course in surface chemistry and colloids. At Bristol, Ron's research group expanded greatly, as did his international reputation. He was promoted to Reader in 1966 and to a personal chair in 1971. In 1982 he became the fourth Leverhulme Professor and Head of the Department of Physical Chemistry. He also served periods as Chair of the School of Chemistry and as Dean of Science. He received many prizes and honours, the two greatest being his election to the Fellowship of the Royal Society in 1982 and the award of an OBE in 1989. He was invited to give seminars and to collaborate with academia and with industry, all around the world. Outside the university he served on many committees and was involved in the foundation of several academic societies. Ron Ottewill supervised 99 successful PhD students and published more than 300 scientific papers. He formally retired in 1992 but retained an active interest in science till the last.

Nikolai Izmailov (1907-1961): An appreciation

Nikolai Izmailov (1907-1961): An appreciation

Per Ekwall and Physical Chemistry 1 in Lund: Ion Binding and Microstructure in Relation to Phase Behavior

The research in the Department of Physical Chemistry 1 at Lund University includes topics such as surfactant self‐assembly; polymers, solutions, gels and phase behavior, polymer‐surfactant systems; protein and protein‐amphiphile systems; adsorption and surface forces; experimental methodology in colloid science; and theory and modeling. (Annual Report (2004) Physical Chemistry 1; Lund University; Sweden.) How different research topics emerge is, of course, in many cases a complicated story and there are often long traces back. In this treatise, looking back on connections, we will demonstrate that early contacts with Per Ekwall have to a considerable extent influenced our research directions. As we will describe, the early contacts concerned experimental studies of ion binding in concentrated surfactant systems. These inspired further studies of ion binding in a range of colloid systems and these, in turn, theoretical work on electrostatic interactions. Per Ekwall and his coworker Krister Fontell also introduced us into the fascinating subject of cubic liquid crystals, which inspired us into the problem of connectivity versus discreteness of surfactant self‐assemblies. Another significant aspect of the contacts with Per Ekwall and his group was that we learned the important role of phase diagrams in understanding surfactant systems. After analyzing briefly the early contacts we will exemplify some of our work on ion binding and on microstructure; aspects on phase diagrams are discussed by Håkan Wennerström in another article in this volume.