Synthesis of MgH2 using autocatalytic effect of MgH2

Abstract Detailed evidence has been accumulating that at least one chain reaction occurs during the coagulation of blood. Both the metamorphosis of platelets and the development of thrombokinase appear to be involved. The autocatalytic effect may serve a function in making possible the growth of a hemostatic plug. It also offers advantages in the physiologic control of the clotting mechanism. It is likely that the chain reaction occurs in most instances where a thrombus forms, and plays some part in its propagation. The chain reaction is a potentially explosive phenomenon which demands an adequate countermechanism. With materials derived from blood, reactions have long since been demonstrated which can reduce thrombokinase activity, inactivate thrombin and liquefy fibrin. These reactions may help to maintain the fluidity of the circulating blood by removing the products of smoldering clotting reactions. Such effects could help to delimit the growth of a hemostatic plug, or to end the propagation of a thrombus. While it is now possible to correlate in this way the data on blood coagulation with present knowledge of hemostasis and thrombosis, critical gaps in our understanding still remain.

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Effect of Size on Degradation of Porous Poly(Lactic Acid) Scaffold

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.311-313.1741 ◽

2011 ◽

Vol 311-313 ◽

pp. 1741-1745

Author(s):

Chao Guo ◽

Xiao Bo Sheng ◽

Cheng Lin Chu ◽

Yin Sheng Dong

Keyword(s):

Molecular Weight ◽

Lactic Acid ◽

Mass Loss ◽

Porous Scaffold ◽

Repeat Unit ◽

Poly Lactic Acid ◽

Porous Scaffolds ◽

Degradation Behaviors ◽

The Difference ◽

Autocatalytic Effect

Poly (lactic acid) (PLA) scaffolds with different sizes are often fabricated for various requirements. A cellular automaton simulation was used to investigate the effect of the size on the degradation behaviors of porous PLA scaffolds. Four porous PLA scaffolds with 90% initial porosity and different sizes were established by a novel repeat unit method. Mass loss and the change in molecular weight during the degradation were simulated. The results indicate that mass loss is related to the size of the porous scaffold while molecular weight change is independent on the size. With the size of the porous scaffold increasing, the mass loss increases while the difference in mass loss between the scaffolds with different sizes decreases. All these changes can be attributed to the difference in the autocatalytic effect and corresponding oligomer diffusion ability of the porous scaffolds with different sizes.

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Polymerization Reactions under high Pressure. I. Some Experiments with Isoprene and Butyraldehyde

Rubber Chemistry and Technology ◽

10.5254/1.3535507 ◽

1930 ◽

Vol 3 (3) ◽

pp. 472-482

Author(s):

J. B. Conant ◽

C. O. Tongberg

Keyword(s):

High Pressure ◽

Room Temperature ◽

High Pressures ◽

Order Reaction ◽

Pressure Coefficients ◽

First Order ◽

Rate Of Polymerization ◽

Energy Relationships ◽

Temperature And Pressure ◽

Autocatalytic Effect

Abstract 1. The rate of polymerization of isoprene under high pressures has been studied. The reaction is subject to positive catalysis by peroxides and negative catalysis by hydroquinone. Although the reaction is of a high order, the rate is approximately in accord with a first order reaction presumably because of an autocatalytic effect. The temperature and pressure coefficients of the rate have been estimated. The solubility and elasticity of the product depend on the extent to which the isoprene has been polymerized; when the polymerization is practically complete at room temperature at 12,000 atm. the product is very insoluble 2. The action of high pressures on n-butyraldehyde produces a solid only slightly soluble in organic solvents. It reverts to n-butyraldehyde rapidly. It is suggested that this polymer is similar to the well-known polymers of formaldehyde but that the energy relationships are such that the polymer is stable only at high pressures.

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Autocatalytic effect in the processes of metal oxide reduction. II. Kinetics of molybdenum oxide reduction

Journal of Solid State Chemistry ◽

10.1016/0022-4596(91)90350-q ◽

1991 ◽

Vol 92 (2) ◽

pp. 436-448 ◽

Cited By ~ 15

Author(s):

Jerzy Słoczyn´ski ◽

Waldemar Bobin´ski

Keyword(s):

Metal Oxide ◽

Molybdenum Oxide ◽

Oxide Reduction ◽

Metal Oxide Reduction ◽

Kinetics Of ◽

Autocatalytic Effect

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Experimental studies of iron transformations kinetics and autocatalysis during its physicochemical removal from underground water

Water Science & Technology Water Supply ◽

10.2166/ws.2021.428 ◽

2021 ◽

Author(s):

S. Yu Martynov ◽

V. L. Poliakov

Keyword(s):

Experimental Data ◽

Mathematical Model ◽

Experimental Studies ◽

Underground Water ◽

Model Parameters ◽

Kinetic Coefficients ◽

Transfer Equations ◽

The Mathematical Model ◽

Autocatalytic Effect ◽

Forms Of Iron

Abstract The mathematical model of physicochemical iron removal from groundwater was developed. It consists of three interrelated compartments. The results of the experimental research provide information in support of the first two compartments of the mathematical model. The dependencies for the concentrations of the adsorbed ferrous iron and deposited hydroxide concentrations are obtained as a result of the exact solution of the system of the mass transfer equations for two forms of iron in relation to the inlet surface of the bed. An analysis of the experimental data of the dynamics of the deposit accumulation in a small bed sample was made, using a special application that allowed to select the values of the kinetic coefficients and other model parameters based on these dependencies. We evaluated the autocatalytic effect on the dynamics of iron ferrous and ferric forms. The verification of the mathematical model was carried out involving the experimental data obtained under laboratory and industrial conditions.

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