Kinetics of the wood impregnation process. Modeling and experiment

1999 ◽  
Vol 72 (4) ◽  
pp. 590-598 ◽  
Author(s):  
M. A. Brich ◽  
V. P. Kozhin ◽  
V. K. Shchitnikov
RSC Advances ◽  
2019 ◽  
Vol 9 (28) ◽  
pp. 16167-16175 ◽  
Author(s):  
Shiping Zhan ◽  
Jingchang Wang ◽  
Weijing Wang ◽  
Liyun Cui ◽  
Qicheng Zhao

In this work, drug-loaded polymer microparticles were prepared by a supercritical solution impregnation (SSI) process with nitrendipine as the model drug and PLLA–PEG–PLLA as the drug carrier.


2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Valery Bühl ◽  
Paulina Pizzorno ◽  
Cristina Álvarez ◽  
Mariela Pistón ◽  
Nelly Mañay

2016 ◽  
Vol 39 (2) ◽  
pp. 208-218 ◽  
Author(s):  
Stefan Rönsch ◽  
Jakob Köchermann ◽  
Jens Schneider ◽  
Steffi Matthischke

The Analyst ◽  
2015 ◽  
Vol 140 (3) ◽  
pp. 869-879 ◽  
Author(s):  
M. Champeau ◽  
J.-M. Thomassin ◽  
C. Jérôme ◽  
T. Tassaing

High pressure FTIR micro-spectroscopy to follow the kinetics of the drug loading during the supercritical CO2 assisted impregnation process.


2018 ◽  
Vol 267 ◽  
pp. 458-465 ◽  
Author(s):  
Téné Rosine Zinkoné ◽  
Imma Gifuni ◽  
Laurence Lavenant ◽  
Jérémy Pruvost ◽  
Luc Marchal

2018 ◽  
Vol 24 (21) ◽  
pp. 2383-2393 ◽  
Author(s):  
Lek Wantha

Polymorphism is a behavior of a substance to crystallize into more than one district crystal structures. Preferential formation of a polymorph depends strongly on the kinetics of the relevant mechanisms. Solutionmediated polymorphic transformation is an important mechanism in crystallization of organic compounds from solution. Knowing its kinetics allows us to understand the process and control the polymorphic formation. In this review, concepts, kinetics, and process modeling of crystallization and solution-mediated polymorphic transformation are examined and summarized.


Author(s):  
J. F. DeNatale ◽  
D. G. Howitt

The electron irradiation of silicate glasses containing metal cations produces various types of phase separation and decomposition which includes oxygen bubble formation at intermediate temperatures figure I. The kinetics of bubble formation are too rapid to be accounted for by oxygen diffusion but the behavior is consistent with a cation diffusion mechanism if the amount of oxygen in the bubble is not significantly different from that in the same volume of silicate glass. The formation of oxygen bubbles is often accompanied by precipitation of crystalline phases and/or amorphous phase decomposition in the regions between the bubbles and the detection of differences in oxygen concentration between the bubble and matrix by electron energy loss spectroscopy cannot be discerned (figure 2) even when the bubble occupies the majority of the foil depth.The oxygen bubbles are stable, even in the thin foils, months after irradiation and if van der Waals behavior of the interior gas is assumed an oxygen pressure of about 4000 atmospheres must be sustained for a 100 bubble if the surface tension with the glass matrix is to balance against it at intermediate temperatures.


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