Real characters in blocks

We consider real versions of Brauer's k(B) conjecture, Olsson's conjecture and Eaton's conjecture. We prove the real version of Eaton's conjecture for 2-blocks of groups with cyclic defect group and for the principal 2-blocks of groups with trivial real core. We also characterize G-classes, real and rational G-classes of the defect group of a block B

Agronomical and phytochemical investigation of Hyssopus officinalis

Hyssop (Hyssopus officinalis L.) obtained from various commercial sources was grown for three years (1990-1992) in Finland. Yield characteristics, flower colour, volatile oil content/composition and its antimicrobial quality were studied. For comparison, Scottish-grown hyssop was included in oil and quality determinations. The description of the flower colour given by the seed firms was not a reliable indicator of the true colour in many cases. Oil yield was satisfactory and oil composition was rather uniform. Only one different chemotype was identified, this was derived from a Romanian seed source. There was considerable variation in herb yield between plants from different sources. The total fresh herb yield was 0.5-3.2 kg/m2, the dry leaf yield was 67-326 g/m2. Seed germination was satisfactory (76-99%), offering opportunities for seed production of varieties with different characteristics

Cartan Invariants and Central Ideals of Group Algebras

Abstract. In this paper we investigate general properties of Cartan invariants of a finite group G in characteristic 2. One of our results shows that the Cartan matrix of G in characteristic 2 contains an odd diagonal entry if and only if G contains a real element of 2-defect zero. We also apply these results to 2-blocks of symmetric groups and to blocks with normal or abelian defect groups. The second part of the paper deals with annihilators of certain ideals in centers of group algebras and blocks

Evaluation of biomass potential and oil yield of Myrica gale L. for possible field cultivation

vokMTT Mikkel