Inhibiting Effect of H2S on Toluene Hydrogenation Over a MoS2/Al2O3 Catalyst. [Erratum to document cited in CA120:79857]

1995 ◽  
Vol 34 (4) ◽  
pp. 1500-1500 ◽  
Author(s):  
Slavik Kasztelan ◽  
Denis Guillaume
Keyword(s):  
Toluene Hydrogenation ◽  
Inhibiting Effect ◽  
Al2o3 Catalyst

Kinetics of toluene hydrogenation on Ni/Al2O3 catalyst

1993 ◽  
Vol 48 (22) ◽  
pp. 3813-3828 ◽  
Author(s):  
Lars Peter Lindfors ◽  
Tapio Salmi ◽  
Stefan Smeds
Keyword(s):  
Toluene Hydrogenation ◽  
Kinetics Of ◽  
Al2o3 Catalyst

Inhibiting effect of decan-1-ol on the transformation of n-hexadecane over a Pt/SiO2–Al2O3 catalyst

2010 ◽  
Vol 100 (1-2) ◽  
pp. 165-172 ◽  
Author(s):  
A.S. Guedes ◽  
C. Fontaine ◽  
C. Bouchy ◽  
S. Brunet
Keyword(s):  
Inhibiting Effect ◽  
Al2o3 Catalyst

Inhibiting effect of oxygenated model compounds on the HDS of dibenzothiophenes over CoMoP/Al2O3 catalyst

2010 ◽  
Vol 383 (1-2) ◽  
pp. 14-23 ◽  
Author(s):  
M. Philippe ◽  
F. Richard ◽  
D. Hudebine ◽  
S. Brunet
Keyword(s):  
Model Compounds ◽  
Inhibiting Effect ◽  
Al2o3 Catalyst

Plasmatic and Platelet Anti-Plasmins and Anti-Activators

1967 ◽  
Vol 18 (03/04) ◽  
pp. 404-415 ◽  
Author(s):  
G. J. H den Ottolander ◽  
B Leijnse ◽  
H. M. J Cremer-Elfrink
Keyword(s):  
Platelet Suspension ◽  
Inhibiting Effect

SummaryDirect antiplasmin and anti-urokinase can be measured with artificial clots to which plasma, serum or platelet suspension is added incubated in plasmin or urokinase respectively. Whilst only 3% of the total antiplasmin in the blood is present in the platelets, there is 40% of the total antiurokinase present in the platelets. The properties of this thrombocytic anti-urokinase are discussed. Only 60% is soluble in water. By heating this solution the inhibiting effect increases. Platelet anti-activator is also active against other activators but has not the same properties as anti-urokinase. Implications of these findings are discussed.

A COMPARISON BETWEEN THE EXOPHTHALMOS INHIBITING EFFECTS OF SODIUM-D- AND SODIUM-L-THYROXINE IN GUINEA PIGS

1962 ◽  
Vol 41 (4) ◽  
pp. 619-624 ◽  
Author(s):  
Björn Tengroth ◽  
Uno Zackrisson
Keyword(s):  
Hyaluronic Acid ◽  
Pituitary Gland ◽  
Guinea Pigs ◽  
Anterior Lobe ◽  
Optical Isomers ◽  
Connective Tissues ◽  
Response Curves ◽  
Experimental Animals ◽  
Inhibiting Effect ◽  
Caloric Effect

ABSTRACT The general change in the connective tissues which occurs in animals with experimentally produced exophthalmos, consists in an increase in the amount of hyaluronic acid, which binds the water in the connective tissue. Many regard this process as a stimulation of the mucinous system in the connective tissues, and consider this an explanation of the phenomenon of exophthalmos. When the experimental animals are injected with thyroxine or thyroid extract, the reaction observed is opposite to that seen following the injection of the anterior lobe of the pituitary gland. In the former case, there is a reduction in the amount of hyaluronic acid and consequently a decrease in the water content in the connective tissues. In the experiments in question, Na-d-thyroxine and Na-l-thyroxine), in crystalline form, were tested for their inhibiting effect on the development of exophthalmos in experimental animals. The animals used were male albino guinea-pigs. An extract of the anterior lobe of the pituitary gland (TSH Organon)) was used to produce exophthalmos. In previous work (Tengroth 1961), it was shown, using an X-ray measuring technique, that d-thyroxine, despite its poor caloric effect, like l-thyroxine had an exophthalmos-inhibiting effect. When comparing the dose-response curves of the exophthalmos-inhibiting properties of both these optical isomers, it appears that d-thyroxine has an inhibiting effect which is significantly greater than that of l-thyroxine. The significance of this observation is discussed.

Conversion of fructose into methyl lactate over SnO2/Al2O3 catalystin flow regime

2020 ◽  
pp. 43-47
Author(s):  
S.V. Prudius ◽  
◽  
N.L. Hes ◽  
A.M. Mylin ◽  
V.V. Brei ◽  
...  
Keyword(s):  
Flow Reactor ◽  
Practical Interest ◽  
Dimethyl Acetal ◽  
Racemic Mixture ◽  
Process Conditions ◽  
Impregnation Method ◽  
Aqueous Methanol ◽  
Methyl Lactate ◽  
Al2o3 Catalyst ◽  
Target Reaction

In recent years, numerous researchers have focused on the development of catalytic methods for processing of biomass-derived sugars into alkyl lactates, which are widely used as non-toxic solvents and are the starting material for obtaining monomeric lactide. In this work, the transformation of fructose into methyl lactate on Sn-containing catalyst in the flow reactor that may be of practical interest was studied. The supported Sn-containing catalyst was ob-tained by a simple impregnation method of granular γ-Al2O3. The catalytic ex-periments were performed in a flow reactor at temperatures of 160-190 °C and pressure of 3.0 MPa. The 1.6-9.5 wt.% fructose solutions in 80% aqueous methanol were used as a reaction mixture. It was found that addition to a reac-tion mixture of 0.03 wt.% potassium carbonate leads to the increase in selec-tivity towards methyl lactate on 15% at 100% conversion of fructose. Prod-ucts of the target reaction С6Н12О6 + 2СН3ОН = 2С4Н8О3 + 2Н2О were ana-lyzed using 13C NMR method. The following process conditions for obtaining of 65 mol% methyl lactate yield at 100% fructose conversion were found: use of 4.8 wt.% fructose solution in 80% methanol, 180 °С, 3.0 МПа and a load on catalyst 1.5 mmol C6H12O6/mlcat/h at contact time of 11 minutes. The cata-lyst productivity is 2.0 mmol C4H8O3/mlcat/h and the by-productі are 1,3-dihydroxyacetone dimethyl acetal (20%) and 5-hydroxymethylfurfural (10%). It should be noted that a racemic mixture of L- and D-methyl lactates has been obtained by conversion of D-fructose on the SnO2/Al2O3 catalyst. The SnO2/Al2O3 catalyst was found to be stable for 6 h while maintaining full fruc-tose conversion at 55–70% methyl lactate selectivity. After regeneration the catalyst completely restores the initial activity.

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