Odd Electrons of Nanomaterials: A New Approach to Computational Chemical Engineering

2007 ◽  
Author(s):  
Elena F. Sheka ◽  
Theodore E. Simos ◽  
George Maroulis
Keyword(s):  
Chemical Engineering ◽  
New Approach

scholarly journals Antisystem-Approach (ASA) for Engineering of Wide Range of Dynamic Systems

2021 ◽  
Vol 3 (1) ◽  
pp. 52-66
Author(s):  
Serge Zacher
Keyword(s):  
Mathematical Model ◽  
Dynamic System ◽  
Dynamic Systems ◽  
Chemical Engineering ◽  
Original System ◽  
New Approach ◽  
Analysis And Design ◽  
Wide Range ◽  
Newton’S Laws ◽  
Definition Of

Following the famous third physical Newton’s laws, “for every action there is an equal and opposite re-action”, a new approach for analysis and design of dynamic systems was introduced by [Zacher, 1997] and called «Antisystem-Approach» (ASA). According to this approach, a single isolated dynamic system does not exist alone. For every dynamic system, which transfers its inputs into outputs with an operator A in one direction, there is an equal system with the same operator A, which transfers other inputs into outputs in opposite direction. The antisystem does not have to be a physical system; it can also be a mathematical model of the original system. The most important feature of ASA is the exact balance between a system and its antisystem, which is called “energy” or “intensity”. In the group theory the system and antisystem are denote as antisymmetric. They build duality, which is common in many branches of sciences as mathematics, physics, biology etc. In the twenty years since first publication of the ASA there were developed different methods and applications, which enable to simplify the engineering, analysing the antisystem instead of original system. In the proposed paper is given the definition of ASA und are shown its features. It is described, how the ASA was used in electrical and chemical engineering, automation, informatics. Only several applications will be discussed, although ASA-solutions are common and could be used for wide range of dynamic systems.

scholarly journals Chemical Engineering via Art

2008 ◽  
Vol 2 (1) ◽  
pp. 51-56
Author(s):  
Abraham Tamir
Keyword(s):  
Chemical Engineering ◽  
Scientific Journals ◽  
Art And Science ◽  
New Approach

The major aim of this article is to demonstrate via art different aspects of Chemical Engineering. This is a new approach developed by the author to describe scientific and engineering subjects via art, thus making them more understandable and easy to percept. The author has reached this conclusion after teaching several times a course on “The Interaction Between Art and Science” as well as writing articles in several scientific journals.

Akbari-Ganji's Method

2017 ◽  
pp. 246-273
Keyword(s):  
Differential Equation ◽  
Partial Differential Equation ◽  
Differential Equations ◽  
Boundary Conditions ◽  
Chemical Engineering ◽  
Solid Mechanics ◽  
Nonlinear Partial Differential Equation ◽  
The Other ◽  
Partial Differential ◽  
New Approach

The nonlinear partial differential equation governing on the mentioned system has been investigated by a simple and innovative method which we have named it Akbari-Ganji's Method or AGM. It is notable that this method has been compounded by Laplace transform theorem in order to covert the partial differential equation governing on the afore-mentioned system to an ODE and then the yielded equation has been solved conveniently by this new approach (AGM). One of the most important reasons of selecting the mentioned method for solving differential equations in a wide variety of fields not only in heat transfer science but also in different fields of study such as solid mechanics, fluid mechanics, chemical engineering, etc. in comparison with the other methods is as follows: Obviously, according to the order of differential equations, we need boundary conditions so in the case of the number of boundary conditions is less than the order of the differential equation, this method can create additional new boundary conditions in regard to the own differential equation and its derivatives. Therefore, a solution with high precision will be acquired. With regard to the afore-mentioned explanations, the process of solving nonlinear equation(s) will be very easy and convenient in comparison with the other methods.

Application of biofilm theory to the prediction of sulfide production from bioslimes

1994 ◽  
Vol 29 (10-11) ◽  
pp. 537-543
Author(s):  
G. A. Holder
Keyword(s):  
Chemical Engineering ◽  
Industrial Effluent ◽  
Limited Range ◽  
Operating Conditions ◽  
Rational Approach ◽  
Empirical Correlations ◽  
New Approach ◽  
Biochemical Processes ◽  
The United Kingdom ◽  
Sulfide Production

The problems caused by the formation of sulfide within sewerage systems are briefly reviewed. The mechanism by which the hydrogen sulfide is produced within sewers and the procedures for controlling its production are briefly outlined. In order to design effectively for sulfide control a reliable means of predicting the rate of sulfide production is desirable. The different procedures which have been developed in Australia, the United Kingdom and the U.S.A. (i.e. the equations developed respectively by Thistlethwayte, Boon and Lister, and Pomeroy) are, however based on empirical correlations of experimental data, and hold over a limited range of operating conditions. These procedures are also known to be unreliable. The desirability of replacing the present procedures by a more rational approach is demonstrated. A major advantage of the new approach, which is based upon a chemical engineering analysis of the mass transport and biochemical processes which occur, is that, whereas the previous procedures were developed essentially for domestic sewage, the more rational approach can be applied to sewage containing a high proportion of industrial effluent.

A new approach to the optimal design of industrial chemical-engineering apparatuses

2012 ◽  
Vol 46 (5) ◽  
pp. 437-445 ◽  
Author(s):  
D. S. Dvoretskii ◽  
S. I. Dvoretskii ◽  
G. M. Ostrovskii ◽  
B. B. Polyakov
Keyword(s):  
Optimal Design ◽  
Chemical Engineering ◽  
New Approach ◽  
Industrial Chemical

The O–C diagrams of minor planets − a new approach to modelling the rotation

1999 ◽  
Vol 173 ◽  
pp. 185-188
Author(s):  
Gy. Szabó ◽  
K. Sárneczky ◽  
L.L. Kiss
Keyword(s):  
Error Analysis ◽  
Time Dependence ◽  
Theoretical Work ◽  
Minor Planet ◽  
Minor Planets ◽  
New Approach ◽  
Preliminary Results ◽  
Ccd Observations

AbstractA widely used tool in studying quasi-monoperiodic processes is the O–C diagram. This paper deals with the application of this diagram in minor planet studies. The main difference between our approach and the classical O–C diagram is that we transform the epoch (=time) dependence into the geocentric longitude domain. We outline a rotation modelling using this modified O–C and illustrate the abilities with detailed error analysis. The primary assumption, that the monotonity and the shape of this diagram is (almost) independent of the geometry of the asteroids is discussed and tested. The monotonity enables an unambiguous distinction between the prograde and retrograde rotation, thus the four-fold (or in some cases the two-fold) ambiguities can be avoided. This turned out to be the main advantage of the O–C examination. As an extension to the theoretical work, we present some preliminary results on 1727 Mette based on new CCD observations.

A New Approach to the Demonstration of Oxidase-Localization Using Tannic Acid Or Catechin

1973 ◽  
Vol 31 ◽  
pp. 698-699
Author(s):  
V. Mizuhira ◽  
Y. Futaesaku
Keyword(s):  
Cross Section ◽  
Tannic Acid ◽  
Elastic Fiber ◽  
The Other ◽  
New Approach ◽  
Tissue Block ◽  
Active Reaction ◽  
The Cross

Previously we reported that tannic acid is a very effective fixative for proteins including polypeptides. Especially, in the cross section of microtubules, thirteen submits in A-tubule and eleven in B-tubule could be observed very clearly. An elastic fiber could be demonstrated very clearly, as an electron opaque, homogeneous fiber. However, tannic acid did not penetrate into the deep portion of the tissue-block. So we tried Catechin. This shows almost the same chemical natures as that of proteins, as tannic acid. Moreover, we thought that catechin should have two active-reaction sites, one is phenol,and the other is catechole. Catechole site should react with osmium, to make Os- black. Phenol-site should react with peroxidase existing perhydroxide.

Sign in / Sign up

Export Citation Format

Share Document