scholarly journals Physico-Chemical Tables Vol I Chemical Engineering and Physical Chemistry

Nature ◽  
1903 ◽  
Vol 67 (1736) ◽  
pp. 314-315
Author(s):  
J. A. H.
Metals ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 556 ◽  
Author(s):  
Nathalie Leclerc ◽  
Sophie Legeai ◽  
Maxime Balva ◽  
Claire Hazotte ◽  
Julien Comel ◽  
...  

This paper presents recent views on a hybrid process for beneficiation of secondary raw materials by combined electroleaching of targeted metals and electrodeposition. On the basis of several case studies with aqueous solutions or in ionic liquid media, the paper describes the potential and the limits of the novel, hybrid technique, together with the methodology employed, combining determination of speciation, physical chemistry, electrochemistry, and chemical engineering. On one hand, the case of electroleaching/electrodeposition (E/E) process in aqueous media, although often investigated at the bench scale, appears nevertheless relatively mature, because of the developed methodology, and the appreciable current density allowed, and so it can be used to successfully treat electrode materials of spent Zn/MnO2 batteries or Ni/Cd accumulators and Waelz oxide. On the other hand, the use of ionic liquids as promising media for the recovery of various metals can be considered for other types of wastes, as shown here for the case of electrodes of aged fuel cells. The combined (E/E) technique could be successfully used for the above waste, in particular by the tricky selection of ionic liquid media. Nevertheless, further investigations in physical chemistry and chemical engineering appear necessary for possible developments of larger-scale processes for the recovery of these strategic resources.


Author(s):  
Jagbir Rehal ◽  
Vinod Beniwal ◽  
B. S. Gill

Information on the physico-chemical, engineering and functional properties of soybean is pertinent to design equipment for the grading, pretreatments and processing. It will also help to decide the right end-use of the valuable crop as it has various diverse applications. This study evaluated these properties of two popular cultivars of soybean grown in Punjab, India viz. SL-744 and SL-958 and the investigations revealed that the grains of SL-958 are bolder and heavier than SL-744 with lighter color, greater hydration capacity, swelling capacity and volume making it more suitable for applications which require soaking and heat processing. SL-744 exhibits higher water absorption and oil absorption capacities as well as foaming capacity hence it can be used in baking industry where these properties are desirable for improving the texture, consistency and flavor of the prepared products.


1942 ◽  
Vol 4 (11) ◽  
pp. 101-112 ◽  

The little town of Prenzlau not far from Berlin was for many generations the home of the Nernst family. One of its scions, grandson of the Lutheran pastor there in Napoleonic times, settled on the land and farmed a large estate on the Royal domains. It was here that Gustav Nernst, the father of the great scientist, was born. He joined the Prussian civil service and became a judge. While he was posted at Briesen, in West Prussia, his wife, née Ottilie Nerger, gave birth on 25 June, 1864, to their third child, christened Walther Hermann. Originally Walther Nernst seemed likely to follow in the footsteps of his ancestors. He was deeply interested in classics and literature and indeed at one time desired to become a poet. But his chemistry master at Graudenz Gymnasium inspired him with a love of that subject. As boys will, he gradually got together materials for a small laboratory in the cellar of his father’s house and thenceforward to the day of his death his allegiance to science never wavered. Though he passed out of the Gymnasium as head of the school and his Latin composition ranked as one of the best of the year, he devoted his time at the university entirely to natural science. He attended courses at the universities of Zürich, Wuerzburg and Graz where Professor von Ettinghausen especially exercised a great influence upon him. Having taken his degree under Friedrich Kohlrausch at Wuerzburg in 1886 he worked with Ostwald at Leipzig for some years where his interest in the then border-line subject between physics and chemistry, crystallised. In 1891, he became Reader in Physics at Göttingen where a year later he married Emma Lohmeyer, the daughter of a distinguished surgeon. In 1894 he was invited to accept a chair at Munich, but he preferred to remain at Göttingen. Here the university built him a new physico-chemical laboratory and he became the first professor of that subject. He was nominated Geheimrat in 1904 and a year later became Professor of Physical Chemistry in Berlin. He remained in the capital for the rest of his official life. For two years (1922-1924) he was President of the Physikalisch-Technische Reichsanstalt, but the call of the university was too strong and he returned as Professor of Physics and Director of the Physical Laboratory in 1924 until his retirement in 1934.


2007 ◽  
Author(s):  
Ioannis A. Bitsanis ◽  
Evangelos Manias ◽  
Theodore E. Simos ◽  
George Maroulis

2016 ◽  
Vol 682 ◽  
pp. 321-326 ◽  
Author(s):  
Piotr Palimąka ◽  
Stanislaw Pietrzyk ◽  
Tomasz Sak

Electrical conductivity is one of the most important physico-chemical parameters in chemical engineering as well as in the technology of many industrial process. Especially in the metals production by the electrolysis from molten salts or metals recovery from slags in the electric furnaces, where the great energy is needed.In this work the continuously varying cell constant (CVCC) technique for measuring conductivity of non-ferrous slags and molten salts was used. This is high-accuracy technique, which requires no calibration. The technique was verified by measuring conductivity of standard KCl solution and molten KCl. A good agreement was obtained between measured and commonly accepted literature values. The results of measured conductivity of KF-AlF3 melts were compared with data obtained by other authors. It was proved that CVCC technique can measure accurately the electrical conductivity of high-temperature molten salts and metallurgical slags.


2021 ◽  
Author(s):  
Leonardo Baptista

<div> The present manuscript intends to propose using the Google Colab platform to teach and solve physical chemistry problems using Python computational language. Seven Jupyter notebooks were written and made available for the students via Google Colab supplementary material of the physical chemistry course of the chemical engineering course of the Technological Faculty of the Rio de Janeiro State University. These notebooks include several problems extracted from the course bibliography and solved with the use of Python language. The scripts show how the students can perform linear and polynomial regressions, fit math models to given data, perform numerical integration and plot creation using Python and its standards libraries. The Colab platform was chosen because it is free to use, does not require the installation, setup, and configuration of Python packages and their libraries in the students’ personal computers. It is a multiuser and collaborative environment, ideal for remote classes. The notebooks can be shared between instructor and students or between the students, which easy the communication and track of students’ progress. Indeed, this resource can be useful even after the end of the pandemic. This manuscript describes the platform, its advantages, how it was applied in our physical chemistry course, and the students’ feedback at the end of the term. All notebooks are available as Supplementary Material of the manuscript, translated from Portuguese to English since our course is entirely in Portuguese. I hope the material and experience shared in this manuscript can be helpful to chemistry instructors who intend to abroad their pedagogical methods to engage more students in the undergraduate courses. </div>


1915 ◽  
Vol 15 (1) ◽  
pp. 33-35
Author(s):  
John Brownlee

In a large number of cases the curves which describe the rate at which ferments, antibodies, etc., disappear in the body accord in form with the equations of physical chemistry, but not so as to be readily interpretable. If one molecule, two molecules, etc., take part in a reaction then it is clear that the indices in the equations must bear certain relations to whole numbers. Failure to conform to these relations seems at first sight to imply that a fraction of a molecule takes part in a reaction, but this is not necessarily the case. Such a failure has been found to appear when the curves of many vital phenomena, e.g. the disappearance of agglutins in an organism, are fitted to physico-chemical equations. A possible meaning, however, can easily be seen.


2009 ◽  
Vol 20 (2) ◽  
pp. 255 ◽  
Author(s):  
Thomas H. Spurling ◽  
David H. Solomon

Sefton Hamann was born in Christchurch, New Zealand, on 8 January 1921 and died in Melbourne on 12 January 2009. He had a distinguished career in Australia's CSIRO as a scientist, as Chief of the Divisions of Physical Chemistry (1960?1966) and Applied Chemistry (1966?1974) and as Chairman of the Applied Chemistry Laboratories Committee (1974?1978). He was internationally recognized for his lifelong contributions to the physico-chemical effects of pressure. He made a major contribution to the nation through his work on the polymer banknote.


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