Common intersection point independent of temperature for compressed liquid mixtures

1995 ◽  
Vol 269-270 ◽  
pp. 371-379 ◽  
Author(s):  
A. Boushehri ◽  
E.K. Goharshadi
Keyword(s):  
Liquid Mixtures ◽  
Intersection Point ◽  
Compressed Liquid ◽  
Common Intersection ◽  
Common Intersection Point

Common intersection point independent of pressure, a new regularity

2004 ◽  
Vol 113 (1-3) ◽  
pp. 133-141 ◽  
Author(s):  
Elaheh K. Goharshadi ◽  
Alireza Naseri Mood
Keyword(s):  
Intersection Point ◽  
Common Intersection ◽  
Common Intersection Point

scholarly journals Graphical and computational methods for determining the stability constants of mono- and polynuclear complexes with a common intersection point of the family of formation curves

2020 ◽  
Vol 2 (2) ◽  
pp. 70-77
Author(s):  
Igor Povar ◽  
◽  
Oxana Spinu ◽  
Boris Pintilie
Keyword(s):  
Experimental Data ◽  
Stability Constants ◽  
Critical Evaluation ◽  
Intersection Point ◽  
Computational Method ◽  
Tabular Data ◽  
The Family ◽  
Common Intersection ◽  
The Stability ◽  
Common Intersection Point

Aqueous polynuclear systems have been analyzed, for which the family of formation curves intersects at a common point. The analyzed graphical and computational method for determining the stability constants can be used as initial values within the iterative calculation process. In some cases, the stability constants are calculated using only the coordinates of the common intersection point. The obtained equations could be of special interest when the experimental data can be interpreted in several models. In these cases, given the large volume of experimental data, the calculation is simple and the model can certainly be chosen with high safety. The obtained equations may also be applied for critical evaluation of tabular data if the coordinates of the intersection point are known. A series of real polynuclear systems have been analyzed and useful conclusions have been made.

Alternative Inverse Kinematic Equations for General RRP and RRR Regional Structures of Manipulators

1996 ◽  
Author(s):  
Peregrine E. J. Riley
Keyword(s):  
Degrees Of Freedom ◽  
Joint Angle ◽  
Inverse Kinematic ◽  
Intersection Point ◽  
Degree Polynomial ◽  
Six Degrees Of Freedom ◽  
Common Intersection ◽  
Position And Orientation ◽  
Spatial Positioning ◽  
Orientational Structure

Abstract Many manipulators with six degrees of freedom are constructed with two distinct sections, a regional structure for spatial positioning, and an orientational structure having a common intersection point for the joint axes. With this arrangement, inverse kinematic solutions for position and orientation may be found separately. While solutions for general three link manipulators have been available since the work of Pieper in 1969, this paper presents new forms of the inverse kinematic equations for general RRP and RRR regional structures. Cartesian coordinates of the F-surface (generated by movement of the outer two joints) together with the outer joint angle are used as the equation variables. In addition, a second degree polynomial approxiamation of the equation may be used for quick iteration to a solution. It is hoped that these new equations will be useful by themselves and in workspace regions where solutions using equations in terms of the joint variables are numerically inaccurate or impossible.

scholarly journals Activation of pepsin (EC 3.4.4.1) by heavy-metal ions including a contribution to the mode of action of copper sulphate in pig nutrition

1976 ◽  
Vol 36 (1) ◽  
pp. 15-22 ◽  
Author(s):  
M. Kirchgessner ◽  
M. G. Beyer ◽  
H. Steinhart
Keyword(s):  
Turnover Rate ◽  
Maximum Velocity ◽  
Intersection Point ◽  
Ferrous Ions ◽  
Pepsin Activity ◽  
Nickel Ions ◽  
Common Intersection ◽  
Haemoglobin S ◽  
Variable Substrate ◽  
Substrate Concentrations

1. Kinetic experiments were done with pepsin (EC 3.4.4.1) using haemoglobin as a substrate in the presence of different metal cations.2. The activation of peptic hydrolysis with higher concentrations of cupric ions added to the reaction mixture was determined from turnover-rate curves in experiments with constant substrate concentration. With a Cu2+ concentration greater than 1.67 × 10-4M activation was obtained3. Nickel ions at a concentration of 8.33 × 10-4 M and at higher concentrations also increased pepsin activity. Additions of ferrous ions and zinc ions had no effect.4. Experiments were done using variable substrate concentrations in the presence of different Cu2+ concentrations. The concentrations of haemoglobin ([S]) at half maximum velocity were determined. The double-reciprocal plots of [S] v. reaction velocity (v) (i.e. I/[S] v. I/v) had no common intersection point. Therefore the kinetics did not correspond to any of the known kinetics. The activation brought about by Cu2+ cannot easily be explained by the study of the kinetics. Certain simple explanations of the phenomenon can be eliminated.

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