Thermodynamic characteristics of the adsorption of organic substances on the ionic adsorbent barium sulfate with a modified surface. 2. Adsorption of aliphatic and some heterocyclic nitrogen- and oxygen-containing compounds

The purpose of this work is to study the process of neutralization of vapors of a mixed solvent of the brand 650 by the adsorption‑catalytic method. The essence of the method consists in the concentration of solvent components on the sorbent, thermal desorption followed by periodic flameless catalytic oxidation of accumulated organic substances to carbon dioxide and water. Synthetic zeolite of the NaX brand was used as a sorbent, and a porous material based on foam ceramics of the Al2O3/SiO2 composition with a highly developed modified surface with an active catalytic phase was used as a catalyst. The mixed solvent contains, xylenes, ethylcellosol, n‑butanol. It is shown that the value of the sorption volume of zeolite for each class of the considered compounds is influenced by certain factors: the length and structure of the carbon skeleton, the position of the hydroxyl group (for alcohols and esters), the number of methyl groups in the composition of molecules (for the production of benzene). The conversion rate of the mixed solvent components was 65.4–90.1 %.

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Series of Organic Substances

Scientific American ◽

10.1038/scientificamerican07121884-7103csupp ◽

1884 ◽

Vol 18 (445supp) ◽

pp. 7103-7104

Author(s):

Otto Schnurrer

Keyword(s):

Organic Substances

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Hydrogenation Comes to Revolutionize Gasoline Production , Organic Substances Reduce Boiler Scale, and more

Scientific American ◽

10.1038/scientificamerican0929-252 ◽

1929 ◽

Vol 141 (3) ◽

pp. 252-254

Keyword(s):

Organic Substances ◽

Gasoline Production

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Investigations on the Nature of Hemophilia A

Thrombosis and Haemostasis ◽

10.1055/s-0038-1654959 ◽

1963 ◽

Vol 09 (01) ◽

pp. 030-052 ◽

Cited By ~ 4

Author(s):

Eberhard Mammen

Keyword(s):

Factor Viii ◽

Human Plasma ◽

Barium Sulfate ◽

Freeze Drying ◽

Room Temperature ◽

Hemophilia A ◽

Normal Human Plasma ◽

Normal Human ◽

And Storage ◽

Prothrombin Activation

SummaryIn this paper an inhibitor is described that is found in hemophilic plasma and serum different from any till now described inhibitor. The inhibitor only inhibits prothrombin activation in the “intrinsic clotting systems”. This inhibitor is probably not present in normal human plasma or serum. It is destroyed by ether and freeze drying, is labile to acid and storage at room temperature. It is stable upon dialysis and has not been adsorbed on barium sulfate, aluminum hydroxide or kaolin. It precipitates at 50% v/v saturation with alcohol. The nature of this inhibitor seems to be a protein or lipoprotein.Factor VIII was isolated from hemophilic plasma. The amount isolated was the same as from normal plasma and the activity properties were not different. Hemophiliacs have normal amounts of factor VIII.

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“In vitro” Neutralization with Oxalate Ion of the Anticoagulant Effect of Heparin

Thrombosis and Haemostasis ◽

10.1055/s-0038-1654928 ◽

1961 ◽

Vol 05 (02) ◽

pp. 314-318 ◽

Cited By ~ 1

Author(s):

W. O Cruz ◽

L Meis ◽

C. P Dietrich

Keyword(s):

Calcium Oxalate ◽

Aluminium Hydroxide ◽

Barium Sulfate ◽

Anticoagulant Effect ◽

Normal Plasma ◽

Oxalate Ion

SummaryHeparinized blood or plasma coagulates if, after addition of oxalate, recalcification follows. Of the decalcifying agents only oxalate ion has been suitable for demonstrating this phenomenon. Oxalate seem to accomplish two different roles connected with this effect: a fundamental one, i. e., to sensitize a heparinlipoprotein complex to the action of an anti-heparin factor found in normal plasma or serum and a secondary one, related to its capacity to adsorb this antiheparin factor. The latter is removable by centrifugation. This anti-heparin oxalate factor, which is able to counteract the action of heparin after previous addition of oxalate, was found in sequestrened, Dowex 50 resin plasma or in serum, but is not active in citrated plasma. This factor was removed from plasma by adsorption with barium sulfate, aluminium hydroxide or calcium oxalate and was eluted from these adsorbants after incubation with saline.

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A Simple Method for Preparing Fibrinogen

Thrombosis and Haemostasis ◽

10.1055/s-0038-1655637 ◽

1966 ◽

Vol 16 (01/02) ◽

pp. 198-206 ◽

Cited By ~ 26

Author(s):

W Straughn ◽

R. H Wagner

Keyword(s):

Barium Sulfate ◽

Caproic Acid ◽

Aminobutyric Acid ◽

Gamma Aminobutyric Acid ◽

Human Fibrinogen ◽

Simple Method ◽

High Yields ◽

Marked Stability

SummaryA simple new procedure is reported for the isolation of canine, bovine, porcine, and human fibrinogen. Two molar β-alanine is used to precipitate fibrinogen from barium sulfate adsorbed plasma. The procedure is characterized by dependability and high yields. The material is 95% to 98% clottable protein but still contains impurities such as plasminogen and fibrin-stabilizing factor. Plasminogen may be removed by adsorption with charcoal. The fibrinogen preparations exhibit marked stability to freezing, lyophilization, and dialysis. Epsilon-amino-n-caproic acid and gamma-aminobutyric acid which were also studied have the property of precipitating proteins from plasma but lack the specificity for fibrinogen found with β-alanine.

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ABOUT HEAT CAPACITY OF TITANIUM CARBIDE TiCx

Alternative Energy and Ecology (ISJAEE) ◽

10.15518/isjaee.2019.01-03.056-066 ◽

2019 ◽

pp. 56-66

Author(s):

I. Khidirov ◽

V. V. Getmanskiy ◽

A. S. Parpiev ◽

Sh. A. Makhmudov

Keyword(s):

Heat Capacity ◽

High Temperature ◽

Titanium Carbide ◽

Temperature Dependence ◽

Carbon Concentration ◽

Room Temperature ◽

Thermodynamic Characteristics ◽

Liquid Nitrogen Temperature ◽

Analysis Data ◽

Thermal Excitation

This work relates to the field of thermophysical parameters of refractory interstitial alloys. The isochoric heat capacity of cubic titanium carbide TiCx has been calculated within the Debye approximation in the carbon concentration range x = 0.70–0.97 at room temperature (300 K) and at liquid nitrogen temperature (80 K) through the Debye temperature established on the basis of neutron diffraction analysis data. It has been found out that at room temperature with decrease of carbon concentration the heat capacity significantly increases from 29.40 J/mol·K to 34.20 J/mol·K, and at T = 80 K – from 3.08 J/mol·K to 8.20 J/mol·K. The work analyzes the literature data and gives the results of the evaluation of the high-temperature dependence of the heat capacity СV of the cubic titanium carbide TiC0.97 based on the data of neutron structural analysis. It has been proposed to amend in the Neumann–Kopp formula to describe the high-temperature dependence of the titanium carbide heat capacity. After the amendment, the Neumann–Kopp formula describes the results of well-known experiments on the high-temperature dependence of the heat capacity of the titanium carbide TiCx. The proposed formula takes into account the degree of thermal excitation (a quantized number) that increases in steps with increasing temperature.The results allow us to predict the thermodynamic characteristics of titanium carbide in the temperature range of 300–3000 K and can be useful for materials scientists.

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