Search results for: R. Hiltunen

Items from 1 to 20 out of 29 results

article

Nasa, Nemesia and Euphrasia: new alternate hosts of Cronartium spp.

J. Kaitera, R. Hiltunen, J. Hantula, M.‐L. Desprez‐Loustau

Susceptibility of 18 alternate host species to Cronartium flaccidum or C. ribicola was tested. Alive test plants were inoculated in the greenhouse and the formation of Cronartium uredinia and telia was followed on the plants for 8 weeks. Cronartium flaccidum formed uredinia and telia on Bartsia alpina and Euphrasia stricta (Orobanchaceae), Nasa triphylla and N. urens (Loasaceae), Nemesia floribunda...

article

Tannins, flavonoids and stilbenes in extracts of African savanna woodland trees Terminalia brownii, Terminalia laxiflora and Anogeissus leiocarpus showing promising antibacterial potential

E.Y.A. Salih, M. Kanninen, M. Sipi, O. Luukkanen, more

South African Journal of Botany > 2017 > 108 > C > 370-386

Terminalia laxiflora, Terminalia brownii and Anogeissus leiocarpus are used as decoctions, macerations, infusions and fumigations in East and West African traditional medicine for treatment of infectious diseases and their symptoms. Using this ethnopharmacological information as a guideline for our research and owing to the fact that these species have not been subjected to in depth antibacterial...

article

Cronartium rust sporulation on hemiparasitic plants

J. Kaitera, R. Hiltunen, J. Hantula

Plant Pathology > 64 > 3 > 738 - 747

Susceptibility of potential alternate host plants to pine stem rusts belonging to Cronartium spp. was artificially tested in Finland during 2012–2013. Forty‐three species representing 11 plant families were inoculated in the laboratory; 34 species (11 families) were inoculated in the greenhouse with aeciospores of Cronartium flaccidum or C. ribicola. Twenty‐one selected species (10 families) were...

article

Fruiting and sporulation of Thekopsora and Chrysomyxa cone rusts in Picea cones and Prunus leaves

J. Kaitera, R. Hiltunen, T. Kauppila, M. Pitkäranta, more

Forest Pathology > 44 > 5 > 387 - 395

Natural fruiting and sporulation of cone rusts were investigated in cones of Picea spp. and leaves of Prunus spp. in a botanical garden in northern Finland in 2007–2012. Thekopsora areolata was the most frequent cone rust in Picea abies cones, where it colonizes the host tissues and hinders normal seed development. Aecia of T. areolata were also common in cones of Picea engelmannii and occasionally...

article

Antimycobacterial activity of ellagitannin and ellagic acid derivate rich crude extracts and fractions of five selected species of Terminalia used for treatment of infectious diseases in African traditional medicine

P. Fyhrquist, I. Laakso, S. Garcia Marco, R. Julkunen-Tiitto, more

South African Journal of Botany > 2014 > 90 > Complete > 1-16

Ten crude extracts and their solvent partition fractions from five species of Terminalia collected in Tanzania were assessed for antimycobacterial effects using Mycobacterium smegmatis ATCC 14468 as a model organism. We report here, for the first time, on antimycobacterial effects of root and stem bark extracts of Terminalia sambesiaca and Terminalia kaiserana as well as of fruit extracts of Terminalia...

article

PP258-SUN BLOOD SELENIUM LEVELS (B-SE) IN NON-CANCER AND CANCER PATIENTS IN FINLAND FROM 1987 TO 2012

K. Mahlberg, K. Jaakkola, P. Lähteenmäki, R. Hiltunen

Clinical Nutrition > 2013 > 32 > Supplement 1 > S120

article

Effect of polyethyleneglycol on coenzyme Q10 bioavailability from nanosystems in vitro

M. V. Karlina, V. M. Kosman, O. N. Pozharitskaya, A. N. Shikov, more

Pharmaceutical Chemistry Journal > 2012 > 46 > 4 > 241-244

Coenzyme Q10 (CoQ10) is a natural antioxidant of the oil-soluble benzoquinone group that is involved in electron transport in mitochondria. CoQ10 possesses a broad spectrum of pharmacological activity. However, its insolubility in water and low bioavailability upon peroral administration are significant disadvantages. The present work was aimed at a biopharmaceutical evaluation of nanosystems (NS)...

article

Susceptibility of Pedicularis spp. to Cronartium ribicola and C. flaccidum in Finland

J. Kaitera, R. Hiltunen

Forest Pathology > 41 > 3 > 237 - 242

Aeciospores of Cronartium ribicola and C. flaccidum were collected from several locations in Finland and used to inoculate Pedicularis spp. and some known and suspected alternate hosts in 2008–2009. In all trials, C. ribicola formed uredinia and telia on leaves of Ribes nigrum. No uredinia or telia of C. ribicola formed on older leaves of Pedicularis spp. but both uredinia and telia were found on...

article

Elevated plasma fibrinogen caused by inadequate α-linolenic acid intake can be reduced by replacing fat with canola-type rapeseed oil

T. Seppänen-Laakso, I. Laakso, T. Lehtimäki, R. Rontu, more

Prostaglandins, Leukotrienes and Essential Fatty Acids (PLEFA) > 2010 > 83 > 1 > 45-54

The effects of canola-type rapeseed oil (RSO) on serum lipids, plasma fibrinogen, lipid oxidation and fatty acids were studied in three groups of subjects, two of which had not been consuming fish in their habitual diets. Forty-two volunteers (35 women, 7 men, 16–62 years) replaced fat with RSO for 6 weeks in a parallel design. The average cholesterol and fibrinogen concentrations were 5.0mmol/l and...

article

Biopharmaceutical study of nanosystems containing betulin for inhalation administration

M. V. Karlina, O. N. Pozharitskaya, A. N. Shikov, V. G. Makarov, more

Pharmaceutical Chemistry Journal > 2010 > 44 > 9 > 501-503

Betulin, a triterpenoid present in birch bark, possesses a broad spectrum of biological activity. Its bioavailability is limited by low solubility in water whereas the shape and size of particles are not suited for administration via inhalation. One of the main drawbacks of inhalation preparations is low bioavailability because of the sedimentation of particles in the mouth. The present work was aimed...

article

Salvia species as potential sources in the treatment of Alzheimer's disease

K. Dastmalchi, D. Dorman, H. Vuorela, R. Hiltunen

European Journal of Pharmaceutical Sciences > 2008 > 34 > 1 Supplement > S38

article

Preliminary antiproliferative effects of some species of Terminalia, Combretum and Pteleopsis collected in Tanzania on some human cancer cell lines

P. Fyhrquist, L. Mwasumbi, P. Vuorela, H. Vuorela, more

Fitoterapia > 2006 > 77 > 5 > 358-366

Methanolic extracts (25 μg/ml) of species belonging to the genera of Combretum, Terminalia and Pteleopsis, collected during a field expedition in Tanzania in 1999, were screened for their antiproliferative and cytotoxic effects against three human cancer cell lines (HeLa, cervical carcinoma; T 24, bladder carcinoma; and MCF 7, breast carcinoma). A leaf extract of Combretum fragrans and a fruit extract...

article

Effect of an acid treatment on the phytochemical and antioxidant characteristics of extracts from selected Lamiaceae species

M. Koşar, H.J.D. Dorman, R. Hiltunen

Food Chemistry > 2005 > 91 > 3 > 525-533

Aqueous-methanol extracts were prepared from basil (Ocimum basilicum L.), bay (Laurus nobilis L.), oregano (Origanum vulgare L.), rosemary (Rosmarinus officinalis L.), sage (Salvia officinalis L.), savory (Satureja hortensis L.) and thyme (Thymus vulgaris L.) by maceration and their phytochemical and antioxidant characteristics were assessed. Each extract was submitted to an acid treatment (1.2 N...

article

Fe(III) reductive and free radical-scavenging properties of summer savory (Satureja hortensis L.) extract and subfractions

H.J.D. Dorman, R. Hiltunen

Food Chemistry > 2004 > 88 > 2 > 193-199

Satureja hortensis L. (summer savory) is an annual herb belonging to the family Lamiaceae. It is used as a condiment and as a plant in traditional folk medicine to treat infectious diseases and disorders. A number of studies have suggested that the activity of Satureja hortensis may relate to the antioxidant properties of its secondary metabolites. Therefore, this study attempts to characterise the...

article

An Improved HPLC Post-Column Methodology for the Identification of Free Radical Scavenging Phytochemicals in Complex Mixtures

M. Koşar, D. Dorman, K. Başer, R. Hiltunen

Chromatographia > 2004 > 60 > 11-12 > 635-638

The importance of natural antioxidants principally relates to their health-promoting properties. The discovery of new sources of established compounds or more potent compounds is a costly exercise and any technique capable of aiding this procedure would be highly significant. An approach combining chromatographic separation, component analysis and post-column identification of free radical scavenging...

article

Characterisation of the antioxidant properties of de-odourised aqueous extracts from selected Lamiaceae herbs

H.J.D. Dorman, A. Peltoketo, R. Hiltunen, M.J. Tikkanen

Food Chemistry > 2003 > 83 > 2 > 255-262

De-odourised aqueous extracts of four commonly consumed herbs belonging to the Lamiaceae family, i.e. oregano (Origanum vulgaris L.), rosemary (Rosmarinus officinalis L.), sage (Salvia officinalis L.) and thyme (Thymus vulgaris L.), were investigated for their antioxidant properties. Various experimental models were used for the characterisation of the activity, including iron reduction capacity,...

article

Effect of β-sitosterol on precipitation of cholesterol from non-aqueous and aqueous solutions

L. Christiansen, M. Karjalainen, T. Seppänen-Laakso, R. Hiltunen, more

International Journal of Pharmaceutics > 2003 > 254 > 2 > 155-166

The aim of the present work was to study the solubility and phase behaviour of the β-sitosterol-cholesterol mixed crystals in the presence and absence of water. Cholesterol, β-sitosterol and 3:1, 1:1 and 1:3 mixtures of these were co-precipitated from acetone and acetone-water solutions. Precipitated crystals were analysed using powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC),...

article

Propagation of Angelica archangelica Plants in an Air-Sparged Bioreactor from a Novel Embryogenic Cell Line, and their Production of Coumarins

M. Eeva, T. Ojala, P. Tammela, B. Galambosi, more

Biologia Plantarum > 2003 > 46 > 3 > 343-347

A spontaneously embryogenic cell line of the coumarin producing angelica [Angelica archangelica (L.) subsp. archangelica] was established via callus formation from seedlings grown from sterilized seeds on semi-solid, hormone-free modified B5 medium. The cell line has retained its embryogenic capacity for 5 years. The highest coumarin production for the cell line after 3 weeks of cultivation was achieved...

article

An Improved On-Line HPLC-DPPH Method for the Screening of Free Radical Scavenging Compounds in Water Extracts of Lamiaceae Plants

M. Kosar, H. J. D. Dorman, O. Bachmayer, K. H. C. Baser, more

Chemistry of Natural Compounds > 2003 > 39 > 2 > 161-166

An on-line HPLC-1,1-diphenyl-2-picrylhydrazyl (DPPH*) method has been improved for the detection of polar and nonpolar radical scavenging compounds from complex plant extracts. Eight water extracts were prepared from steam-distilled essential oil-extracted Lamiaceae plants (Origanum vulgare L., O. Onites L., O. Minutiflorum O. Schwartz et P. H. Davis, O. Syriacum L., Satureja cuneifolia Ten., Thymbra spicata...

article

Analysis of fatty acids by gas chromatography, and its relevance to research on health and nutrition

T. Seppänen-Laakso, I. Laakso, R. Hiltunen

Analytica Chimica Acta > 2002 > 465 > 1-2 > 39-62

Gas chromatography (GC) has been an indispensable analytical technique ever since the first exciting steps in the application of fatty acid determinations in oilseed plant breeding, biosynthesis and human metabolism. Present-day GC methods with high-quality capillary columns allow sensitive and reproducible fatty acid analyses, as well as the characterization of complex mixtures of geometric isomers...

Publication date

Set your own date range

INFONA - science communication portal

Search results for: R. Hiltunen

Nasa, Nemesia and Euphrasia: new alternate hosts of Cronartium spp.

Tannins, flavonoids and stilbenes in extracts of African savanna woodland trees Terminalia brownii, Terminalia laxiflora and Anogeissus leiocarpus showing promising antibacterial potential

Cronartium rust sporulation on hemiparasitic plants

Fruiting and sporulation of Thekopsora and Chrysomyxa cone rusts in Picea cones and Prunus leaves

Antimycobacterial activity of ellagitannin and ellagic acid derivate rich crude extracts and fractions of five selected species of Terminalia used for treatment of infectious diseases in African traditional medicine

PP258-SUN BLOOD SELENIUM LEVELS (B-SE) IN NON-CANCER AND CANCER PATIENTS IN FINLAND FROM 1987 TO 2012

Effect of polyethyleneglycol on coenzyme Q10 bioavailability from nanosystems in vitro

Susceptibility of Pedicularis spp. to Cronartium ribicola and C. flaccidum in Finland

Elevated plasma fibrinogen caused by inadequate α-linolenic acid intake can be reduced by replacing fat with canola-type rapeseed oil

Biopharmaceutical study of nanosystems containing betulin for inhalation administration

Salvia species as potential sources in the treatment of Alzheimer's disease

Preliminary antiproliferative effects of some species of Terminalia, Combretum and Pteleopsis collected in Tanzania on some human cancer cell lines

Effect of an acid treatment on the phytochemical and antioxidant characteristics of extracts from selected Lamiaceae species

Fe(III) reductive and free radical-scavenging properties of summer savory (Satureja hortensis L.) extract and subfractions

An Improved HPLC Post-Column Methodology for the Identification of Free Radical Scavenging Phytochemicals in Complex Mixtures

Characterisation of the antioxidant properties of de-odourised aqueous extracts from selected Lamiaceae herbs

Effect of β-sitosterol on precipitation of cholesterol from non-aqueous and aqueous solutions

Propagation of Angelica archangelica Plants in an Air-Sparged Bioreactor from a Novel Embryogenic Cell Line, and their Production of Coumarins

An Improved On-Line HPLC-DPPH Method for the Screening of Free Radical Scavenging Compounds in Water Extracts of Lamiaceae Plants

Analysis of fatty acids by gas chromatography, and its relevance to research on health and nutrition

Filter options

Publication date

Content availability

Keywords

Data set

Journal

INFONA - science communication portal

Search results for: R. Hiltunen

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Content availability

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options