Results
repositories = "University of Oulu Repository - Jultika"
> : "Oulun yliopisto, Luonnontieteellinen tiedekunta, Biologian laitos"
(x)
Characterization of Lactobacillus bacteriophage LL-H genes and proteins having biotechnological interest
Author(s) :
Vasala, Antti
Description :
Abstract
Two regions of the genome of the Lactobacillus delbrueckii subsp. lactis bacteriophage LL-H were characterized, representing 14 % of the phage genome. The first region of 2497 bp contained genes encoding phage structural proteins and the second region of 2498 bp genes involved in lytic f...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Female receptivity, song requirement and preferences in Drosophila virilis and D. montana
Author(s) :
Isoherranen, Eija
Description :
Abstract
Most models of sexual selection focus on coevolution of male
sexual trait and female preference for the trait. However, whether
the female preference modifies the male trait depends on the overall
receptivity of females, on the importance of the male trait for
the females, on female sa...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Mate choice and genetic variation in male courtship song in Drosophila montana
Author(s) :
Suvanto, Leena
Description :
Abstract
This thesis deals with factors affecting mate choice as well
as with genetic variation in male courtship song in Drosophila
montana. Males, which produced song with a high carrier
frequency, were found to court females, and also to succeed in
their courtship more often than the males p...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Habitat requirements of juvenile salmonids : towards ecologically-based fisheries management in boreal streams
Author(s) :
Mäki-Petäys, Aki
Description :
Abstract
For effective management of stream salmonids, it is essential to (i) assess the productive potential of a stream in relation to species-specific habitat requirements, and to (ii) identify the key factors underlying any bottleneck periods during the life cycle of a fish. For this purpose, t...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Surface structure, wax and methanol-extractable compounds in Scots pine and Norway spruce needles enhanced UV-B
Author(s) :
Kinnunen, Heli
Description :
Abstract
Increased amounts of epicuticular waxes and UV-absorbing compounds, such as flavonoids, and smaller leaf/needle surface area are plant defence mechanisms against UV-B radiation. The response of the needle epicuticular waxes of Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Effects of copper and nickel on subarctic Scots pine needles
Author(s) :
Kukkola, Eija
Description :
Abstract
Three different studies were conducted to elucidate the effects of copper (Cu) and nickel (Ni) on Scots pine needles. One was the Monchegorsk smelter emission gradient study on the Kola Peninsula, Russia, the second was the 3-year seedling and 6-year adult tree low-level CuNi and acid rain...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Effects of ultraviolet-B radiation (UV-B) on needle anatomy and glutathione status of field-grown pines
Author(s) :
Laakso, Kirsi
Description :
Abstract
It has been suggested that pine needles protect themselves against UV-B radiation via anatomical and chemical changes in the epidermal layer. This could lead to growth reductions if more assimilates are allocated to the protection mechanisms in the epidermis at the expense of the photosynt...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Genetic basis of adaptation: bud set date and frost hardiness variation in Scots pine
Author(s) :
Hurme, Päivi
Description :
Abstract
The genetic basis of large adaptive differences in timing
of bud set and frost hardiness between natural populations of Scots
pine (Pinus sylvestris L.) was studied with
the aid of RAPD markers and quantitative genetic tools. Steep clinal
variation was found for both traits among Finnish S...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Studies on the lichen genus Usnea in East Fennoscandia and Pasific North America
Author(s) :
Halonen, Pekka
Description :
Abstract
The shrubby Usnea species of East Fennoscandia and the whole known Usnea flora of British Columbia were studied. Furthermore, the status and distribution of Usnea hirta and U. longissima, which have divergent habitat requirements and distribution patterns, were surveyd in East Fennoscandia...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Phylogeny and phylogeography of European Parids
Author(s) :
Kvist, Laura
Description :
Abstract
Mitochondrial DNA sequences were used to study the phylogeny, population structure and colonisation history of Parus species.
The phylogenetic relationships of seven European and three American species were examined by sequencing a part of the cytochrome b gene. Phylogenetically the clos...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined