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| 2. |
- Berglund, Per, et al.
(författare)
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2-Methylalkanoic acids resolved by esterification catalysed by lipase from Candida rugosa : Alcohol chain length and enantioselectivity
- 1993
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Ingår i: Tetrahedron Asymmetry. - 0957-4166. ; 4:8, s. 1869-1878
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Tidskriftsartikel (refereegranskat)abstract
- Enantiomerically pure (R)-2-methyldecanoic acid and (S)-2-methyl-1-decanol were prepared in a multi gram scale by esterification reactions catalysed by lipase from Candida rugosa. The enantiomeric ratios (E-values) were determined as a function of the chain length of the alcohol used as the complementary substrate in cyclohexane. In the resolution of 2-methyldecanoic acid the highest value (E = 37 ± 5) was obtained, when either 2-hexanol, 1-heptanol or 1-octanol were used. In contrast, when resolving 2-methyloctanoic acid, the E-values increased continually with increasing chain length of the alcohol used. 1-Hexadecanol gave the highest value: E > 100. The E-values were determined from the enantiomeric excess (ee) of the product at a conversion below 0.4. After two consecutive esterification reactions enantiomerically pure (R)-2-methyldecanoic acid, >99.8% ee, and after subsequent reduction of the ester produced, (S)-2-methyl-1-decanol, 96.7% ee, were obtained.
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| 6. |
- Lalos, Othon, et al.
(författare)
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Urodynamics in women with stress incontinence before and after surgery
- 1993
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Ingår i: European Journal of Obstetrics, Gynecology, and Reproductive Biology. - : Elsevier. - 0301-2115 .- 1872-7654. ; 48:3, s. 197-205
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Tidskriftsartikel (refereegranskat)abstract
- Pad test, cystometry and analysis of micturition were performed in 36 women with stress incontinence before and a year after operation with either retropubic urethrocystopexy (n = 22) or pubococcygeal repair (n = 14). There was no difference in the subjective cure rate between the two groups of women (77% and 79%, respectively). The pad test 1 year after operation showed that 59% of the women in the urethrocystopexy group and 43% of the women in the pubococcygeal repair group had stopped leaking urine. The bladder volume had increased in both groups and the intravesical pressure of the bladder filled to the maximum had increased in the pubococcygeal repair group. The functional length of the urethra, intravesical pressure at maximal urine flow, maximal urine flow rate and urethral conductance were not affected by either operation. Pad test was a more accurate test for an objective evaluation of urine leakage before operation than were the urodynamic investigation or continence tests.
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| 8. |
- Simonsson, Per, et al.
(författare)
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Serotonin-stimulated phosphoinositide hydrolysis in platelets from post-withdrawal alcoholics
- 1992
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Ingår i: Alcohol and Alcoholism. - 1464-3502. ; 27:6, s. 607-612
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Tidskriftsartikel (refereegranskat)abstract
- It has previously been reported that serotonin-stimulated second messenger formation is inhibited in platelets from alcoholics undergoing detoxification. Serotonin-stimulated signal transduction was therefore analysed in platelets from young post-withdrawal alcoholics to elucidate whether the previously reported inhibition is a state or trait marker of alcoholism. No difference between post-withdrawal alcoholics and controls was found with regard to serotonin-stimulated [32P]-phosphatidylinositol 4,5-bisphosphate hydrolysis or [32P]-phosphatidic acid formation. The results indicate that the inhibited serotonin2 receptor function seen in alcoholics undergoing detoxification is a state-dependent rather than a trait-dependent marker.
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