| 1. |
- Sjöblom, Rolf
(författare)
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Molecular reorientations in some hydrogen bonded solids
- 1975
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Proton magnetic resonance second moments and relaxation times at various temperatures are reported for tri- and dimethyl ammonium iodide, bromide, chloride and hydrogen oxalate, and for most of the twenty common amino acids. A general procedure is described for the calculation of theoretical second moments and relaxation times in dipolar solids. In several cases, this procedure is applied to determine the molecular reorientations present as well as the corresponding activation barriers. The results are discussed with particular reference to hydrogen bonding.
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| 2. |
- Petersson, Göran, 1941
(författare)
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Branched deoxyaldaric acids from alkaline degradation of carbohydrates: Structure determination by mass spectrometry of trimethylsilyl derivatives
- 1975
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Ingår i: Carbohydrate Research. ; 43, s. 1-8
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Tidskriftsartikel (refereegranskat)abstract
- The deoxyaldaric acids corresponding in structure to the 3-deoxy-2-C-(hydroxymethyl)aldonic (isosaccharinic) acids have been identified as products of treatment of various carbohydrates with alkali and oxygen-alkali. The structures of the acids were determined from the mass spectra of their Me3Si derivatives on the basis of previously known, specific fragmentation reactions. The g.l.c.-m.s. technique was used, and g.l.c. retention data are given. The identified species are 2-deoxy-3-C-(hydroxymethyl)tetraric, 3-deoxy-2-C-hydroxymethyl-erythro-pentaric, 3-deoxy-2-C-hydroxymethyl-threo-pentaric, 2-methyltartronic, 2-(2-hydroxyethyl)tartronic, and 2-(2,3-dihydroxypropyl)tartronic acids. Their formation from 4-O-substituted uronic and ulosonic acids is briefly discussed.
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| 3. |
- Dave, Göran, 1945, et al.
(författare)
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Biological and toxicological effects of solvent extraction chemicals: Range finding acute toxicity in the rainbow trout (Salmo gairdnerii Rich.) and in the rat (Rattus norwegicus L.)
- 1978
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Ingår i: Hydrometallurgy. - 0304-386X. ; 3:3, s. 201-216
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Tidskriftsartikel (refereegranskat)abstract
- The acute toxicity of twelve solvent extraction chemicals was studied in the albino rat after intraperitoneal injection of the chemicals, and in the rainbow trout (Salmo gairdnerii Rich.) after exposure to the chemicals in the aquaria water. The tested chemicals included the following technical products: one primary aliphatic amine (Primene JM-T), two secondary aliphatic amines (Amberlite LA-1 and Adogen 283), two tertiary aliphatic amines (Adogen 383 and Alamine 336), one quaternary amine (Aliquat 336), two organophosphorus compounds (TBP, tributyl phosphate and HDEHP, di-(2-ethyl)-hexylphosphoric acid), one synthetic carboxylic acid (Versatic 10), one naphthalene-sulphonic acid (NA-SUL AS-50), one substituted oxime (LIX 64N) and one aliphatic alcohol (2-ethylhexanol). The intraperitoneal 96 hours LD 50 in the rat for the tested chemicals varied between less than 50 mg/kg b.w. to more than 5000 mg/kg b.w. Ninety six hours LC 50 in the rainbow trout was not possible to determine for three of the twelve tested chemicals due to their low water solubility. When determined, the LC 50 at 15°C was in the range 0.11–56 mg/l based on the amounts added. The present study discusses the acute toxicity of the chemicals mentioned above, gross pathological changes in the rat and behavioural changes in the fish.
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| 4. |
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| 5. |
- Abrahamsson, Jonas, 1954, et al.
(författare)
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Cholesteryl sulphate and phosphate in the solid state and in aqueous systems.
- 1977
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Ingår i: Chemistry and physics of lipids. - 0009-3084. ; 19:3, s. 213-22
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Tidskriftsartikel (refereegranskat)abstract
- Cholesteryl sodium sulphate (CS) crystallizes as the dihydrate, the crystal structure of which is known. On heating the dihydrate, solid state phase transitions are observed at 65 degrees C and 95 degrees C and melting occurs at 165 degrees C. The structure of the high temperature phase has not been determined. Cholesteryl dihydrogen phosphate (CP) is not isostructural with any phases of CS. It undergoes a phase transition at 50 degrees C and melts at 190 degrees C. In systems with water CS is unstable whereas it was possible to determine the phase diagram of CP. In most of the composition range a crystalline hydrate is in equilibrium with a gel-phase. The latter has remarkable properties in that lamellar order exists with the 46 A lipid bilayer interleaved with water layers up to 1000 A. The monofilm behaviour of CS and CP at different pH levels is also reported.
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| 6. |
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| 7. |
- Löwendahl, Lars, 1940, et al.
(författare)
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Phenolic compounds in kraft black liquor
- 1978
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Ingår i: Svensk Papperstidning. ; 81:12, s. 392-396
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Tidskriftsartikel (refereegranskat)abstract
- The prominent phenolic compounds with one aromatic ring in kraft black liquor were analysed by a combination of liquid chromatography, gas chromatography and mass spectrometry. Extracted spruce meal was cooked both under mild, conventional conditions and under extremely severe conditions. In all, the analyzed phenolic compounds amounted to 0.6 kg per 100 kg of dry wood under conventional conditions. In addition to 2-methoxyphenol, vanillin and 4-hydroxy-3-methoxyacetophenone, several phenolic alcohols and carboxylic acids with the same aromatic substitution were isolated and identified. The yield of related 3,4- dihydroxyphenylsubstituted compounds increased under severe conditions.
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| 8. |
- Dave, Göran, 1945, et al.
(författare)
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Effects of insulin on the fatty acid composition of the total blood plasma lipids in the european EEL, Anguilla anguilla L
- 1979
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Ingår i: Comparative Biochemistry and Physiology A. - 1095-6433. ; 62:3, s. 649-653
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Tidskriftsartikel (refereegranskat)abstract
- 1.1. The fatty acid composition of plasma total lipids in the European eel, Anguilla anguilla L., was studied 3, 10, 24, 96, 168 and 336 hr after i.p. injection of bovine insulin (100 i.u./kg body wt) dissolved in glycine-NaOH buffer solution. Control eels were treated by buffer solution only. 2.2. The insulin-treated eels showed an elevated percentage of palmitoleic acid (16:1) 3 and 336 hr post-injection compared to buffer-treated control eels. 3.3. Insulin caused a significant decrease in the percentage of oleic acid (18:1) 336 hr post-injection. 4.4. Besides the observations mentioned above insulin was not found to have any pronounced effects on the fatty acid composition of total blood plasma lipids.
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| 9. |
- Dave, Göran, 1945, et al.
(författare)
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Metabolic and hematological effects of starvation in the European eel, Anguilla anguilla L.—I. Carbohydrate, lipid, protein and inorganic ion metabolism
- 1975
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Ingår i: Comparative Biochemistry and Physiology A. - 1095-6433. ; 52:3, s. 423-430
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Tidskriftsartikel (refereegranskat)abstract
- 1.The effects of starvation on different metabolities in blood, liver and muscle and the level of cortisol and some inorganic ions in plasma were studied in eels, Anguilla anguilla L., after 11, 47, 96 and 164 days. 2.During the first 96 days the eels apparently used mainly liver and muscle triglycerides and this utilization was accompanied by an increase in water content. 3.Between 47 and 96 days the levels of blood glucose and muscle glycogen increased followed by a decrease. 4.Between 96 and 164 days there was a marked decrease in liver glycogen and plasma protein while the triglyceride and water content of liver and muscle was unaffected. 5.The alterations in cholesterol and phospholipids and the possible role of LCAT (lecithin:cholesterol acyltransferase) in the regulation of these parameters is discussed. 6.During the entire starvation period the level of inorganic phosphate in blood plasma decreased and the level of blood lactate, plasma sodium and plasma cortisol increased. 7.The plasma chloride initially decreased followed by an increase after 96 days. These alterations in plasma chloride are discussed in relation to hematological studies and the level of plasma protein.
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| 10. |
- Dave, Göran, 1945, et al.
(författare)
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Metabolic and hematological effects of starvation in the european eel, Anguilla anguilla L.—III. Fatty acid composition
- 1976
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Ingår i: Comparative Biochemistry and Physiology - Part B: Biochemistry & Molecular Biology. - 1096-4959 .- 1879-1107. ; 53:4, s. 509-515
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Tidskriftsartikel (refereegranskat)abstract
- 1.1. Fatty acid composition in liver and muscle was studied in the European eel (Anguilla anguilla L.) after 11, 47, 96 and 164 days of starvation during the winter season. 2.2. The changes in muscle were small compared with those in liver. 3.3. In both liver and muscle there was a marked decrease in 14:0.∗ 4.4. In the liver starvation caused a decrease in 16:1, 18:1, 20:1 and/or 18:3 and an increase in 20:4, 20:5, 22:4 and 22:5. 5.5. The observed changes are discussed in relation to differences in distributional pattern among the lipid classes, to α- and β-positional preferences and to environmental temperature.
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