Excess Molar Enthalpies of Tetrahydrofuran or Diisopropyl Ether + 1-Alkanols at 298.15 K, Using a Newly Designed Flow Mixing Cell for an Isothermal Microcalorimeter

2001 ◽  
Vol 46 (5) ◽  
pp. 1274-1279 ◽  
Author(s):  
Ángel Piñeiro ◽  
Ángeles Olvera ◽  
Gonzalo García-Miaja ◽  
Miguel Costas
Keyword(s):  
Diisopropyl Ether ◽  
Excess Molar Enthalpies ◽  
Flow Mixing ◽  
Isothermal Microcalorimeter

Chemiluminescence Determination of Glucose, Fructose and their Mixture by the Stopped-Flow Mixing Technique

2003 ◽  
Vol 141 (1-2) ◽  
pp. 73-78 ◽  
Author(s):  
Tomás Pérez-Ruiz ◽  
Carmen Martínez-Lozano ◽  
Virginia Tomás ◽  
José Fenoll
Keyword(s):  
Stopped Flow ◽  
Flow Mixing

The Effect of Incorporating Vessel Compliance in a Computational Model of Blood Flow in a Total Cavopulmonary Connection (TCPC) with Caval Centerline Offset

2004 ◽  
Vol 126 (6) ◽  
pp. 709-713 ◽  
Author(s):  
J. C. Masters ◽  
M. Ketner ◽  
M. S. Bleiweis ◽  
M. Mill ◽  
A. Yoganathan ◽  
...  
Keyword(s):  
Blood Flow ◽  
Power Loss ◽  
Fluid Dynamic ◽  
Reducing Power ◽  
Pressure Head ◽  
Congenital Defects ◽  
Total Cavopulmonary Connection ◽  
Flow Mixing ◽  
The Right ◽  
Cavopulmonary Connection

Background—The total cavopulmonary connection (TCPC), a palliative correction for congenital defects of the right heart, is based on the corrective technique developed by Fontan and Baudet. Research into the TCPC has primarily focused on reducing power loss through the connection as a means to improve patient longevity and quality of life. The goal of our study is to investigate the efficacy of including a caval offset on the hemodynamics and, ultimately, power loss of a connection. As well, we will quantify the effect of vessel wall compliance on these factors and, in addition, the distribution of hepatic blood to the lungs. Methods—We employed a computational fluid dynamic model of blood flow in the TCPC that includes both the non-Newtonian shear thinning characteristics of blood and the nonlinear compliance of vessel tissue. Results—Power loss in the rigid-walled simulations decayed exponentially as caval offset increased. The compliant-walled results, however, showed that after an initial substantial decrease in power loss for offsets up to half the caval diameter, power loss increased slightly again. We also found only minimal mixing in both simulations of all offset models. Conclusions—The increase in power loss beyond an offset of half the caval diameter was due to an increase in the kinetic contribution. Reduced caval flow mixing, on the other hand, was due to the formation of a pressure head in the offset region which acts as a barrier to flow.

ChemInform Abstract: Resolution of Secondary Alcohols Using Lipase in Diisopropyl Ether.

ChemInform ◽  
1989 ◽  
Vol 20 (44) ◽  
Author(s):  
H. S. BEVINAKATTI ◽  
A. A. BANERJI ◽  
R. V. NEWADKAR
Keyword(s):  
Diisopropyl Ether ◽  
Secondary Alcohols

Structural effects on chemo- and enantioselectivity of Candida antarctica lipase B - Resolution of β-amino esters

2002 ◽  
Vol 80 (6) ◽  
pp. 565-570 ◽  
Author(s):  
Szilvia Gedey ◽  
Arto Liljeblad ◽  
László Lázár ◽  
Ferenc Fülöp ◽  
Liisa T Kanerva
Keyword(s):  
Key Words ◽  
Candida Antarctica ◽  
Diisopropyl Ether ◽  
The Other ◽  
Candida Antarctica Lipase B ◽  
Candida Antarctica Lipase ◽  
Structural Effects ◽  
Lipase B ◽  
Amino Esters ◽  
Catalyzed Reactions

The Candida antarctica lipase B-catalyzed reactions of five β-amino esters with neat butyl butanoate and with 2,2,2-trifluoroethyl butanoate in diisopropyl ether were studied, as were the reactions of the same β-amino esters and their N-butanamides with neat butanol. The possibility for sequential resolution, where the amino and ester functions of the substrate both react with an achiral butanoate, became less likely with increasing size of the substrate from ethyl 3-aminobutanoate (1a) to pentanoate (1b) or larger. On the other hand, the alcoholyses of N-acylated β-amino esters successfully proceeded in butanol with E > 100. Gram-scale resolution of the N-butanoylated 1a was performed to demonstrate the usefulness of the method. Key words: lipase, interesterification, acylation, alcoholysis, resolution, β-amino esters.

Sign in / Sign up

Export Citation Format

Share Document