scholarly journals Kinetic studies of the metabolism of foreign organic compounds. 3. The conjugation of phenols with glucuronic acid

1952 ◽  
Vol 52 (3) ◽  
pp. 416-419 ◽  
Author(s):  
H. G. Bray ◽  
Brenda G. Humphris ◽  
W. V. Thorpe ◽  
K. White ◽  
P. B. Wood
Keyword(s):  
Organic Compounds ◽  
Glucuronic Acid ◽  
Kinetic Studies

scholarly journals The copolymeric structure of dermatan sulphate produced by cultured human fibroblasts. Different distribution of iduronic acid- and glucuronic acid-containing units in soluble and cell-associated glycans

1975 ◽  
Vol 151 (3) ◽  
pp. 477-489 ◽  
Author(s):  
A Malström ◽  
I Carlstedt ◽  
L Åberg ◽  
L Å Fransson
Keyword(s):  
Glucuronic Acid ◽  
Human Fibroblasts ◽  
Periodate Oxidation ◽  
Kinetic Studies ◽  
Acid Sulphate ◽  
Iduronic Acid ◽  
Cultured Human Fibroblasts ◽  
Structural Differences ◽  
Extracellular Polymer ◽  
Testicular Hyaluronidase

The structure of dermatan [35S]sulphate-chondroitin [35S]sulphate copolymers synthesized and secreted by fibroblasts in culture was studied. 35S-labelled glycosaminoglycans were isolated from the medium, a trypsin digest of the cells and the cell residue after 72h of 35SO42-incorporation. The galactosaminoglycan component (dermatan sulphatechondroitin sulphate copolymers) was isolated and subjected to various degradation procedures including digestion with testicular hyaluronidase, chondroitinase-AC and-ABC and periodate oxidation followed by alkaline elimination. The galactosaminoglycans from the various sources displayed significant structural differences with regard to the distribution of various repeating units, i.e. IdUA-GalNAc-SO4 (L-iduronic acid-N-acetyl-galactosamine sulphate), GlcUA-GalNAc-SO4 (D-glucuronic acid-N-acetylgalactosamine-sulphate) and IdUA(-SO4)-GalNAc (L-iduronosulphate-N-acetylgalactosamine). The galactosaminoglycans of the cell residue contained larger amounts of IdUA-GalNAc-SO4 than did those isolated from the medium or those released by trypsin. In contrast, the glycans from the latter 2 sources contained large proportions of periodate-resistant repeat periods [GlcUA-GalNAc-SO4 and IdUA(-SO4)-GalNAc]. Periods containing L-iduronic acid sulphate were particularly prominent in copolymers found in the medium. Kinetic studies indicated that the 35S-labelled glycosaminoglycan of the cell residue accumulated radioactivity more slowly than did the glycans of other fractions, indicating that the material remaining with the cells was not exclusively a precursor of the secreted polymers. The presence of copolymers rich in glucuronic acid or iduronic acid sulphate residues in the soluble fractions may be the result of selective secretion from the cells. Alternatively, extracellular, polymer-level modifications such as C-5 inversion of L-iduronic acid to D-glucuronic acid, or sulphate rearrangements, would yield similar results.

scholarly journals Wet Oxidation of Dairy Sewage

2012 ◽  
Vol 19 (1) ◽  
pp. 29-38
Author(s):  
Klara Piotrowska ◽  
Mirosław Imbierowicz ◽  
Andrzej Chacuk
Keyword(s):  
Kinetic Model ◽  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Organic Compounds ◽  
Reduction Rate ◽  
Kinetic Studies ◽  
Wet Oxidation ◽  
Tank Reactor ◽  
Good Agreement

Wet Oxidation of Dairy Sewage Results of kinetic studies on the process of wet oxidation of dairy sewage are presented. Experiments were carried out in a stirred batch tank reactor at the oxygen partial pressure equal to 1 MPa and at temperature ranging from 473 to 523 K. Dairy sewage was subjected to oxidation at a natural pH close to 4. The efficiency of decomposition of organic compounds was estimated on the basis of TOC measurement. The highest TOC reduction rate reached 79.6%. A kinetic model of the process was proposed and its parameters were determined experimentally. Good agreement of the experimental and calculated results was obtained.

scholarly journals Kinetic studies of the metabolism of foreign organic compounds. 4. The conjugation of phenols with sulphuric acid

1952 ◽  
Vol 52 (3) ◽  
pp. 419-423 ◽  
Author(s):  
H. G. Bray ◽  
Brenda G. Humphris ◽  
W. V. Thorpe ◽  
K. White ◽  
P. B. Wood
Keyword(s):  
Sulphuric Acid ◽  
Organic Compounds ◽  
Kinetic Studies

scholarly journals Physicochemical and Adsorption Characteristics of Divinylbenzene-co-Triethoxyvinylsilane Microspheres as Materials for the Removal of Organic Compounds

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2396
Author(s):  
Alicja Bosacka ◽  
Małgorzata Zienkiewicz-Strzalka ◽  
Małgorzata Wasilewska ◽  
Anna Derylo-Marczewska ◽  
Beata Podkościelna
Keyword(s):  
Organic Compounds ◽  
Spherical Shape ◽  
Kinetic Studies ◽  
Inorganic Materials ◽  
Molar Ratio ◽  
Water And Wastewater Treatment ◽  
Molar Ratios ◽  
X Ray Scattering ◽  
Complementary Techniques ◽  
Saxs Analysis

In this work, organic-inorganic materials with spherical shape consisting of divinylbenzene (DVB) and triethoxyvinylsilane (TEVS) were synthesized and investigated by different complementary techniques. The obtained microspheres may be applied as sorbent systems for the purification of organic compounds from water. The hybrid microspheres combine the properties of the constituents depending on the morphologies and interfacial bonding. In this work, the influence of the molar ratio composition of crosslinked monomer (DVB) and silane coupling agent (TEVS) (DVB:TEVS molar ratios: 1:2, 1:1 and 2:1) on the morphology and quality of organic-inorganic materials have been examined. The materials were analysed using small angle X-ray scattering (SAXS) analysis, low-temperature nitrogen sorption, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) to provide information on their structural and surface properties. Moreover, thermal analysis was performed to characterize the thermal stability of the studied materials and the adsorbent-adsorbate interactions, while adsorption kinetic studies proved the utility of the synthesized adsorbents for water and wastewater treatment.

scholarly journals Kinetic studies of the metabolism of foreign organic compounds. 2. The formation of phenols from certain precursors

1952 ◽  
Vol 52 (3) ◽  
pp. 412-415 ◽  
Author(s):  
H. G. Bray ◽  
Brenda G. Humphris ◽  
W. V. Thorpe ◽  
K. White ◽  
P. B. Wood
Keyword(s):  
Organic Compounds ◽  
Kinetic Studies
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