Search Results - "Lapinjoki, S. P."

An Electron Microscope Study of Resin Production and Secretion by the Glands of Seedlings of Betula pendula Roth by Raatikainen, O. J., Taipale, H. T., Pelttari, A., Lapinjoki, S. P.

“…Transmission and scanning electron microscopy were used to study the ultrastructure and secretory processes of resin glands on shoot stems of Betula pendula…”
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Metabolism of Inorganic Carbon Taken Up by Roots in Salix Plants by VUORINEN, A H., VAPAAVUORI, E. M., RAATIKAINEN, O., LAPINJOKI, S. P.

“…The metabolic products of inorganic carbon taken up through the roots from nutrient solution were studied in willow plants. Willow cuttings (Salix cv. Aquatica…”
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Determination of fat-soluble vitamins in a pharmaceutical dosage form by solid-phase extraction and reversed-phase liquid chromatography by Savolainen, K E, Pynnönen, K M, Lapinjoki, S P, Vidgren, M T

“…A rapid and precise method for the determination of fat-soluble vitamins from a water-based multivitamin mixture was developed utilizing solid-phase extraction…”
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Growth signal transduction: rapid activation of covalently bound ornithine decarboxylase during phosphatidylinositol breakdown by Mustelin, T, Pösö, H, Lapinjoki, S P, Gynther, J, Andersson, L C

“…We have previously shown that treatment of T lymphocytes with mitogenic ligands induces a rapid activation of ornithine decarboxylase (ODC) through a mechanism…”
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Gas chromatographic-mass spectrometric analysis of major indole alkaloids of Catharanthus roseus by Ylinen, M, Suhonen, P, Naaranlahti, T, Lapinjoki, S P, Huhtikangas, A

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Isolation of Catharanthus alkaloids by solid-phase extraction and semipreparative HPLC by Naaranlahti, T, Nordström, M, Lapinjoki, S P, Huhtikangas, A, Lounasmaa, M

“…A combination of moderate-pressure chromatography on C18 sorbent and preparative HPLC is developed for rapid isolation of alkaloids from Catharanthus roseus…”
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Identification of indole alkaloids of Catharanthus roseus with liquid chromatography/mass spectrometry using collision-induced dissociation with the thermospray ion repeller by Auriola, S, Naaranlahti, T, Kostiainen, R, Lapinjoki, S P

“…Fragmentation of protonated molecular ions produced from catharanthine, tabersonine, ajmalicine and serpentine in a high-performance liquid chromatography…”
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Possible involvement of humoral regulation in the effects of elevated cerebral 4-aminobutyric acid levels on the polyamine metabolism in brain by Lapinjoki, S P, Pulkka, A E, Laitinen, S I, Pajunen, A E

“…It has been reported in several recent studies that the manipulation of cerebral 4-aminobutyric acid (GABA) level results in unexpected changes in the cerebral…”
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Diurnal levels of polyamines and activities of ornithine and S-adenosyl-L-methionine decarboxylases in mouse brain by Lapinjoki, S P, Hietala, O A, Pajunen, A E, Piha, R S

“…The levels of putrescine and spermine in mouse brain were rather constant at different times of day, as were the activities of ornithine and…”
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Metabolic consequences of inhibition of cerebral adenosylmethionine decarboxylase by methylglyoxal bis(Guanylhydrazone) by Hietala, O A, Pulkka, A E, Lapinjoki, S P, Laitinen, P H, Pajunen, A E

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On the metabolism of ornithine in synaptosomal preparations by Lapinjoki, S P, Pajunen, A E, Pulkka, A E, Piha, R S

“…The present results show that ornithine is metabolized to glutamate by isolated synaptosomes from mouse cerebral cortex. Under the experimental conditions used…”
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Phenothiazines and structurally related compounds as inhibitors of adenosylmethionine decarboxylase: effects on the purified enzyme by Hietala, O A, Lapinjoki, S P, Pajunen, A E

“…The effects of chlorpromazine, imipramine, thioridazine, chlorprothixene, amitriptyline, desipramine and triflupromazine on adenosylmethionine decarboxylase…”
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Contribution of pi-electrons to the inhibition of S-adenosyl-L-methionine decarboxylase by aromatic tricyclic compounds by Lapinjoki, S P, Gynther, J

“…Eleven structural analogs with norharmane (9H-pyrido [3, 4-b] indole) as the basic structure were used to study structure-activity relations of…”
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Development and structure of resin glands on tissues of Betula pendula Roth. during growth by Lapinjoki, S.P, Elo, H.A, Taipale, H.T

“…Betula pendula Roth. and a number of other species of the genus are known to excrete resinous chemicals on juvenile shoots and twigs as deterrents against…”
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Histological and chemical comparison of triterpene and phenolic deterrent contents of juvenile shoots of Betula species by Taipale, H.T. (Kuopio Univ. (Finland). Dept. of Pharmaceutical Chemistry), Haermaelae, L, Rousi, M, Lapinjoki, S.P

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Electrochemical detection of indole alkaloids of Catharanthus roseus in high-performance liquid chromatography by Naaranlahti, T, Ranta, V P, Jarho, P, Nordström, M, Lapinjoki, S P

“…Hydrodynamic voltammograms for indole and five indole alkaloids with different amino functions were obtained in order to evaluate the applicability of…”
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Decarboxylation of 1,2,3,4-tetrahydro-beta-carboline-1-carboxylic acids in brain homogenate and catalysis by pyridoxal-5'-phosphate by Gynther, J, Lapinjoki, S P, Airaksinen, M M, Peura, P

“…[Carboxyl-14C] labelled 1,2,3,4-tetrahydro-beta-carboline-1-carboxylic acid (I) and 1-methyl-1,2,3,4-tetrahydro-beta-carboline-1-carboxylic acid (II) were…”
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The effect of polyamines on the enzymes of the 4-aminobutyric acid metabolism in mouse brain in vitro by Lapinjoki, S.P., Pajunen, A.E.I., Hietala, O.A., Piha, R.S.

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The inverse changes of mouse brain ornithine and S-adenosylmethionine decarboxylase activities by chlorpromazine and imipramine. Dependence of ornithine decarboxylase induction on beta-adrenoceptors by Hietala, O A, Laitinen, S I, Laitinen, P H, Lapinjoki, S P, Pajunen, A E

“…Intraperitoneal injection of chlorpromazine and imipramine increases mouse brain ornithine decarboxylase but decreases S-adenosyl-L-methionine decarboxylase…”
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An enzyme-linked immunosorbent assay for the antineoplastic agent vincristine by Lapinjoki, S P, Veräjänkorva, H M, Huhtikangas, A E, Lehtola, T J, Lounasmaa, M

“…An enzyme-linked immunosorbent assay for vincristine was developed, based on a new procedure for synthesizing the hapten-protein conjugate. In both the…”
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