Jorma Jalonen's research while affiliated with University of Oulu and other places
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Publications (49)
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Interlaboratory comparisons for the analysis of mineral oil have indicated that many laboratories have problems in producing data of acceptable quality, mainly because of variations in the gas chromatographic settings used in the determination. A D-optimal design was therefore utilized to study the effects of six different GC operating settings on...
Interlaboratory comparisons for the analysis of mineral oil in polluted soil using the GC-FID method indicate that extraction and cleanup conditions have significant effects on the analytical results. In this investigation a ruggedness test was performed on the extraction and cleanup method for the determination of total petroleum hydrocarbons in s...
In this investigation two methods were used for estimating the measurement uncertainty due to sampling and analysis of petroleum hydrocarbon contaminated soil. Analysis of variance (ANOVA) was used for type A evaluation of the measurement uncertainty. The results showed that the statistical evaluation of measurement uncertainty can be complicated b...
Research papers in different fields of analytics indicate that the effect of matrix-induced chromatographic response enhancement (matrix effect) is a commonly encountered problem in gas chromatography applications. In this paper, an example of the effect of sample matrix on the quantitative determination of total petroleum hydrocarbons (TPH) by GC–...
Diuron, a widely used herbicide and antifouling biocide, has been shown to persist in the environment and contaminate drinking water. It has been characterized as a "known/likely" human carcinogen. Whereas its environmental transformation and toxicity have been extensively examined, its metabolic characteristics in mammalian livers have not been re...
Hydrolysis and speciation of aluminium sulfate octadecahydrate Al2(SO4)3·18H2O was studied by electrospray time of flight mass spectrometry (ESI TOF MS). Several novel polymeric species were determined. Highly charged polymers, characterized by other methods, such as the Keggin cation [Al13O4(OH)24(H2O)12]7+ and the octameric aluminium hydroxide cl...
Three non-specific methods for the extraction of total petroleum hydrocarbons (TPH) from soil into organic solvent were compared.
The techniques used for sample preparation were Soxhlet extraction, closed-vessel microwave-assisted extraction, and CEN shake
extraction. The total concentrations of extracted compounds in the boiling point range of C10...
Biotransformations of profenofos were studied in vitro. Two metabolites, desthiopropylprofenofos and hydroxyprofenofos, were detected by LC–MS after incubation of profenofos with human liver homogenates and different mammalian liver microsomes. The rank order of desthiopropylprofenofos formation in liver microsomes based on intrinsic clearance (Vma...
ElectroSpray Ionization-Mass Spectrometry (ESI-MS) and computational methods (DFT, MP2, and COSMO) were used to investigate the hydrolysis products of aluminium chloride as a function of sulfate concentration at pH 3.7. With the aid of computational chemistry, structural information was deduced from the chemical compositions observed with ESI-MS. M...
In order to provide additional information for risk assessment of the fungicide metalaxyl, the main objectives were (1) to elucidate the interactions of metalaxyl with different human liver cytochrome P450 enzymes, (2) to tentitatively identify and (semi)quantify metabolites in vitro and (3) to identify human CYP enzymes responsible for metabolism....
2002). Factors affecting growth of cell suspension cultures of Hypericum perforatum L. (St. John's wort) and production of hypericin. In Vitro Cellular and Developmental Biology-Plant, 38: 58-65. Barnes J., Anderson L. A., Phillipson D. J. (2001). St. John's wort (Hypericum perforatum L.): a review of its chemistry, pharmacology and clinical proper...
Hypericum perforatum L. is a traditional medicinal plant that has been used for the treatment of depression. Cultures of compact callus aggregates (CCA) and shoots were established to investigate production of hypericin, pseudohypericin and hyperforin in highly and partly differentiated tissues of H. perforatum L., as well as accumulation of biomas...
The hydrolysis reactions of FeCl3 in 0.1 mM aqueous solutions were monitored by electrospray ionisation time-of-flight mass spectrometry (ESI-ToF-MS). In contrast to the other ionisation techniques, electrospray ionisation provides information on the composition of the elemental cores even in water and salt cluster ions. Therefore, the technique fa...
Hydrolysis of 0.100, 0.010, and 0.001 mol L−1 aqueous solutions of AlCl3·6H2O, each at two pH values ranging from 3.27 to 7.00, was compared by electrospray ionization time-of-flight mass spectrometry. The differences between 4 h and 14 day aged solutions were also studied. Various charges and compositions for species of the same size were observed...
Phenolic compounds from the aerial parts of medicinal plant Rhodiola rosea were identified using LC/MS experiments with time-of-flight and triple quadrupole instruments, providing accurate mass and CID fragmentation data about the compounds. Supercritical fluid extraction (SFE) was used to remove non-polar compounds from the samples, followed by li...
The 13C NMR technique is used for the measurement of the first dissociation constant of sucrose (HL) in highly alkaline solutions. In 1.0 M NaCl/NaOH medium and for 25 °C, the concentration dissociation constant (pK1) was 13.1 ± 0.3; and, for 60 °C, pK1 = 12.30 ± 0.05. The β-d-fructofuranosyl ring was found to be responsible for dissociation. The N...
A new infrared spectroscopic method suitable for determining total fatty alcohol and fatty acid ester concentrations in industrial oils has been developed. Oil samples were diluted with toluene (1:3 w/w), the toxicity and volatility of which are relatively low compared with more commonly used IR solvents, like carbon tetrachloride or carbon disulfi...
Our objective was to study in vivo the role of CYP2C and CYP3A4 in the disposition of 3-keto-desogestrel after administration of desogestrel, by using the selective inhibitors fluconazole (CYP2C) and itraconazole (CYP3A4).
This study had a three-way crossover design and included 12 healthy females, the data from 11 of whom were analyzed. In the fir...
This study focuses on the biodegradability measurements of tall oil-based wood preservatives and their raw materials in groundwater as determined by the respirometric BOD OxiTop method. Certain substances were also analyzed in standard conditions described by OECD 301 F. Results show that creosote oil, a traditional wood preservative, does not biod...
Our objective was to study the effect of the antiplatelet agents clopidogrel and ticlopidine on bupropion (INN, amfebutamone) hydroxylation, a probe reaction for cytochrome P450 (CYP) 2B6 activity.
Twelve healthy male volunteers took a single 150-mg oral dose of bupropion either alone or after pretreatment with 75 mg clopidogrel once daily or 250 m...
The dramatically increased number of new chemical entities (NCE) used in drug discovery has raised a demand for efficient and rapid drug metabolism screening techniques. The aim of this study was to develop a global in vitro metabolic interaction screening test utilising the N-in-1 approach. A cocktail consisting of 10 CYP-selective probes with kno...
The dramatically increased number of new chemical entities (NCE) used in drug discovery has raised a demand for efficient and rapid drug metabolism screening techniques. The aim of this study was to develop a global in vitro metabolic interaction screening test utilising the N-in-1 approach. A cocktail consisting of 10 CYP-selective probes with kno...
The molecular complex formation of six macrocyclic and six acyclic polyethers with tropylium and 4-methoxyphenyltropylium tetrafluoroborates was observed and characterized in the gas phase by fast atom bombardment mass spectrometry (FABMS), to obtain information on intrinsic molecular interactions in the absence of the complicating effect of solvat...
Earlier characterization of some hydrolysis products of AlCl3·6H2O was confirmed by electrospray ionization tandem mass spectrometry with increasing collision energy of projectile ions. At lower collision energies, the aqua ligands were stripped off. At higher energies, two hydroxo groups formed a bridging oxo group with loss of one water molecule....
Cinnamyl alcohol was added to the media of compact callus aggregates (CCA) of Rhodiola rosea for stimulating the production of cinnamyl glycosides. The biotransformation reaction produced high amounts of rosin, while only a very low amount of rosavin was produced. As the consumption rate of cinnamyl alcohol was much higher than production of rosin,...
Endophytes are found in meristematic bud tissues of Scots pine (Pinus sylvestris L.) especially prior to growth, which would suggest their involvement in growth of the bud. To test this hypothesis, production of phytohormones by two bacterial (Methylobacterium extorquens, Pseudomonas synxantha) and one fungal endophyte (Rhodotorula minuta) was stud...
The hydrolysis reactions of AlCl3 in 0.1 M aqueous solutions at pH 3.27–4.20 were monitored by electrospray ionization time-of-flight mass spectrometry (ESI-ToF MS) as a function of time. The cationic and anionic ESI mass spectra of aluminum(III) solutions gave strong evidence of the presence of a variety of monomeric and polymeric complexes. Compe...
The round-leaved sundew Drosera rotundifolia L. produces medicinally active naphthoquinones, mainly 7-methyljuglone and plumbagin. Winter buds of seed propagated plants from different provinces in Finland were used in the initiation of culture in this experiment. After surface disinfestation treatment the plants were propagated in modified half str...
Rhodiola rosea L. (Golden Root) has been used for a long time as an adaptogen in Chinese traditional medicine and is reported to have many pharmacological properties. Along its known secondary metabolites tyrosol (1), salidroside (rhodioloside) (2), rosin (3), rosarin (4), rosavin (5), sachaliside 1 (6) and 4-methoxy-cinnamyl-O-beta-D-glucopyranosi...
Hypericum perforatum L. (St. John's Wort) has been used in modern medicine for treatments of depression and neuralgic disorders. An HPLC method with photodiode array detection for the rapid determination of the major active compounds, naphthodianthrones and phloroglucinols, has been developed. The method permits the determination of hypericin, prot...
Rhodiola rosea L. (Golden Root) has been used for a long time as an adaptogen in Chinese traditional medicine and is reported to have many pharmacological properties. A liquid chromatographic (LC) method with mass spectrometric (MS) detection based on selected ion monitoring (SIM) was developed for determining salidroside, sachaliside 1, rosin, 4-m...
The concentration of 7-methyljuglone was studied in the round-leaved sundew Drosera rotundifolia L. collected from different regions in Northern Finland. Samples for analysis were collected from peat bogs and sandpit habitats. The mean concentration of 7-methyljuglone varied from 1.0 to 2.3% of dry weight. Variation between years in the amount of 7...
Summary
Rhodiola rosea L. (Golden Root) has been used for a long time as an adaptogen in Chinese traditional medicine and is reported to have many
pharmacological properties. The first liquid chromatographic method for simultaneous determination of eight phenylpropanoids
of the plant, including its main bioactive compounds, was developed. The meth...
Liquid chromatography-electrospray time-of-flight mass spectrometry (HPLC-ESI/TOF/MS) and a novel NMR technique, developed to maximise the sensitivity obtained from the standard NMR spectrometer, have been applied to the identification of the phenolic constituents of Eleutherococcus senticosus. In addition, molecular modelling and dihedral bond ang...
The effect of plant density (10 cm, 20 cm and 30 cm × 50 cm) on the plant growth, herbage yield, essential oil production and composition of Hungarian type peppermint (Mentha piperita L. var. sylvestris Sole) was studied in field experiments in Ruukki, Northern Finland (64°40′N and 25°05′E) in two two-year experiments. In the first growing season,...
Hypericum perforatum L. (St. John's Wort) has long been known as a medicinal plant, and has been used for the treatment of depression and neuralgic disorders. Its main active constituents are believed to be a naphthodianthrone, hypericin, and a phloroglucinol, hyperforin. A sensitive high performance liquid chromatography (HPLC)/electrospray tandem...
beta-Oxidation of amino acyl coenzyme A (acyl-CoA) species in mammalian peroxisomes can occur via either multifunctional enzyme type 1 (MFE-1) or type 2 (MFE-2), both of which catalyze the hydration of trans-2-enoyl-CoA and the dehydrogenation of 3-hydroxyacyl-CoA, but with opposite chiral specificity. MFE-2 has a modular organization of three doma...
Fragmentations of three triphenylethylene compounds (toremifene and its two metabolites) with different functional side-chain groups (alcohol, acid and amine) were studied. The compounds were dissociated by collision-induced dissociation (CID) in the interface region of an electrospray ionization source (ESI(+)) and in the collision cell of a tripl...
Crown ether complexes of six-membered N-heteroaromatic cations and the closely related bicyclic purinium cation (6) have been studied by 1H NMR, mass spectrometric and crystallographic methods. The stability constants for the complexes were determined by 1H NMR titration in acetonitrile solution and the complexation stoichiometry by 1H NMR and ESI...
Assays for endogenous ouabain, a cardiac glycoside believed to be involved in blood pressure and volume regulation, are characterized by laboratory-specific plasma values that are measured by different assays. Because of this variability, our study focused on the development of a new (125)I-labeled ouabain derivative for RIA of high sensitivity.
We...
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...
Mentha x piperita L., and five other Mentha species of mint were grown in Northern Finland at the North Ostrobothnia Research Station of the Agricultural Research Center at latitude 64°40′N and 25°05′E. To investigate the influence of harvest dates on the oil composition, leaves were collected at an early flowering stage (50% of buds) (I) and when...
Complexation of six aromatic, nitrogen-containing cations with various crown ethers has been studied using 1H NMR, mass spectrometric and crystallographic methods. Hydrogen bonding appears to be the most important interaction in complexation, but minor eects such as p-stacking or cationÈp interactions have also been observed. The stability constan...
The hydrodistilled leaf oil of sweet cicely [Myrrhis odorata (L.) Scop.] grown in Finland was analyzed by GC and GC/MS. (E)-Anethole (83.1%) was found to be the major constituent among the 39 compounds identified.
Epiermization of 3-hydroxyacyl-CoA, which has been shown to occur as a two-step dehydration-hydration reaction (Hiltunen, J. K., Palosaari, P. M., and Kunau, W.-H. (1989) J. Biol. Chem. 264, 13536-13540; Smeland, E., Jianxun, L., Chu, C., Cuebas, D., and Schulz, H. (1989) Biochem. Biophys. Res. Commun. 160, 988-992) was studied in rat liver. Subcel...
A comparison of different isolation methods for volatile compounds from the leaves ofLedum palustre has been carried out. The aim of the investigation was not to identify all the isolated compounds, though some new compounds were found. Methods used were steam distillation, Soxhlet extraction with n-hexane and the purge & trap technique.
The result...
Citations
... The selection of different probe drugs for in vitro and in vivo evaluation of CYP enzyme activity was based on the recommendations given by United States Food and Drug Administration (USFDA) regulatory authority and the literature preference [22,27,34,[37][38][39][40]. Previous reports have demonstrated the selection criteria of probe substrates for CYPs which includes the availability of substrate and metabolite standards, selectivity, sensitivity, sufficient metabolite production at low substrate concentrations, effect of organic solvents, intersubstrate interactions, metabolic and kinetic properties, etc. [41,42]. In each case, the substrate is metabolized exclusively or primarily by its specific enzyme. ...
... The results revealed that shoot cultures exhibited higher efficiency in terms of biomass and hypericin production, regardless of flask or bioreactor scale. Additionally, bioreactors outperformed flask-scale production in terms of hypericin, pseudohypericin, and hyperforin yields using shoot cultures (Karppinen et al. 2004). The impact of carbon Transgenic plants of Nicotiana tabacum and Lactuca sativa overexpressing Hyp-1 showed decreased efficiency in Agrobacterium-mediated expression. ...
... Hence, for a long time mainly other non-European Drosera species have been used for pharmaceutical purposes [8], namely D. madagascariensis oe. and D. pe/tata Sm. [9,10]. While for D. rotundifo/ia NO levels between 1.0 and 2.3 % have been reported [11][12][13][14], much lower amounts of max. 0.063 % were detected in various sampies of D. madagascariensis by Krenn et al. [9,10] . ...
... The example of such constituents is hypericins, stored in secretory glands present in leaves, stems, and petals of Hypericum perforatum and related species [20]. Since the nonorganized cultures of the above plants yielded only low amounts of naphthodianthrones, bioreactor-grown Hypericum shoots were evaluated as their alternative source [20,[49][50][51]. Another example is artemisinine, a sesquiterpene lactone being the essential drug in malaria treatment. ...
... 62 The former investigations reported that M. piperita oil composition are found menthol and menthone as major compounds. [63][64][65][66][67][68][69][70] The diversity in antioxidant capacities with the reported that one may be attributed to different procedures followed or a different geographical environment, plant type, seasonality, physiological age of the plant, and the method of oil isolation. 40 The antioxidant capacity of mints greatly depends on the presence of phenolics compounds. ...
... For comprehensive and rapid screening, ordinary single substrate assays are cumbersome and slow. The N-in-one approach allows nine major CYP enzymes (CYP1A2, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP2D6, CYP2E1, and CYP3A4) to be simultaneously monitored using ten probe reactions (Turpeinen et al., 2005; Tolonen et al., 2007). The aim of this work was to investigate the potential inhibitory interactions of a selection of widely used pesticides belonging to different chemical groups by the N-in-one assay and to 0887-2333/$ -see front matter Ó 2012 Elsevier Ltd. ...
... No caso da ocorrência de um passivo ambiental como o derramamento de combustíveis em sistemas de águas superficiais e subterrâneas, há uma necessidade cada vez maior de reabilitação dessas áreas, tanto para as populações locais quanto para a indústria (Chiu et al., 2017;Saari, 2009). Apesar disso, os acidentes com derramamento não são a única fonte desse tipo de contaminação. ...
... According to the Food and Agricultural Organization (FAO)/World Health Organization (WHO), acceptable cyanide level in edible plants is 10 mg HCN/kg dry weight. [32] Over the past few years, several methods of extraction for genus Rhodiola have been proposed to obtain the best extraction efficiency, considering most of all: water, [14,17,19,[33][34][35][36][37][38] ethanol, [10,18,19,25,34,37,[39][40][41][42][43][44][45][46][47][48] methanol [9,16,23,[49][50][51][52][53][54][55][56][57][58] and also acetone [59] and ethylacetate [19] as solvents. ...
... The smell may cause headaches to some people. The chemical compositions of the essential oils (EOs) of the entire plant or separated aerial parts (mostly shoots) of Rh. tomentosum have been studied in some European countries [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19], the Far East and Siberia [20][21][22][23][24][25], and Asian countries [17,[26][27][28][29][30][31][32][33][34][35][36][37]. A lot research works have been focused on the evaluation of bioactivities of marsh rosemary extracts. ...
... Hydrolysis is more often than not involved in metal-oxo cluster formation, especially in water environment [78,138,178]. It requires a water molecule to form an oxo-cluster precursor from the dissolving metal-bearing compound [86]. ...