Results
repositories = "University of Oulu Repository - Jultika"
> : "Oulun yliopisto, Luonnontieteellinen tiedekunta, Biologian laitos"
(x)
Variation in grazing tolerance and restoration of meadow plant communities
Author(s) :
Hellström, Kalle
Description :
Abstract
The area of traditionally managed semi-natural meadows is declining throughout Europe. Knowledge of how to restore their species richness is urgently needed. Community manipulations by means of grazing and mowing and, on the other hand, knowledge of species-level responses as well as th...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Post-embryonic growth and fine-structural organization of arthropod photoreceptors : a study involving selected species of insects and crustaceans
Author(s) :
Keskinen, Essi
Description :
Abstract
Arthropod photoreceptors are versatile sense organs. Any investigation of these organs has to consider that their structure and functional limitations at the moment of fixation depend on many factors: species, sex, developmental and nutritional state of the animal, time of day and ambient ...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Biotechnological approaches in lily (Lilium) production
Author(s) :
Pelkonen, Veli-Pekka
Description :
Abstract
Biotechnology has become a necessity, not only in research, but also in the culture and breeding of lilies. Various methods in tissue culture and molecular breeding have been applied to the production of commercially important lily species and cultivars. However, scientific research data o...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Thermoregulatory consequences of starvation and digestion in birds
Author(s) :
Laurila, Mirja
Description :
Abstract
In homeothermic birds and mammals, several thermoregulatory adaptations have evolved for surviving in unstable, food-restricted conditions. This study focuses on two adaptive mechanisms in pigeons (Columba livia) and quails (Coturnix coturnix japonica): hypothermia and the adaptive use obl...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Dihydropyridine receptors in skeletal muscle with comparative reference to muscle development and exercise in mouse and salmon
Author(s) :
Mänttäri, Satu
Description :
Abstract
The dihydropyridine receptor (DHPR) in the skeletal muscle plasma membrane functions as a voltage sensor for excitation-contraction coupling. In the present work the expression and special features of DHPR were studied under various conditions. In order to localize and visualize the DHP...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
The yield and essential oil content of mint (Mentha ssp.) in Northern Ostrobothnia
Author(s) :
Aflatuni, Abbas
Description :
Abstract
Peppermint (Mentha x piperita L.) oil is one of the most popular and widely used essential oils, mostly because of its main components menthol and menthone. Peppermint oil is used for flavouring pharmaceuticals and oral preparations. Corn mint is the richest source of natural menthol. Carv...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Genetic structure at different spatial scales in metapopulations of Silene tatarica
Author(s) :
Tero, Niina
Description :
Abstract
The genetic structure at different spatial scales and growing habitats was studied on Silene tatarica, using AFLP and microsatellite markers. S. tatarica is a rare perennial plant occurring along riverbanks and shores of two annually flooding rivers in Finland. Regional scale analysis base...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Variation in the blood chemical constituents of reindeer : significance of season, nutrition and other extrinsic and intrinsic factors
Author(s) :
Säkkinen, Hannele
Description :
Abstract
Reindeer management in the Fennoscandian area is currently facing challenges such as degradation of winter pastures, which may lead in the most severely affected areas to a concurrent decline in reindeer herd productivity. The use of often expensive supplementary feeding to prevent product...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Flowering time and natural selection in Arabidopsis lyrata
Author(s) :
Riihimäki, Mona-Anitta
Description :
Abstract
Arabidopsis lyrata is a close outcrossing relative of Arabidopsis thaliana, the model organism of plant physiology and molecular biology. I studied variation in flowering time and the factors shaping the variation within and between A. lyrata populations in different environments. The role...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined
Adaptation, population viability and colonization-extinction dynamics of Silene tatarica in riparian habitats
Author(s) :
Jäkäläniemi, Anne
Description :
Abstract
Plants in riparian environments have to tolerate disturbances like floods and erosion. In the absence of disturbances, habitats will gradually become unfavorable for early-successional species. This can have fundamental consequences not only for adaptation at the individual level, but also...
Repository :
University of Oulu Repository - Jultika
Language(s) :
Undetermined