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Assya Petrova Kalina Alipieva Emanuela Kostadinova Daniela Antonova Maria Lacheva Melania Gjosheva Simeon Popov Vassya Bankova 《Chemistry Central journal》2007,1(1):33
Background
Mushrooms in the genus Agaricus have worldwide distribution and include the economically important species A. bisporus. Some Agaricus species are inedible, including A. placomyces and A. pseudopratensis, which are similar in appearance to certain edible species, yet are known to possess unpleasant odours and induce gastrointestinal problems if consumed. We have studied the chemical composition of these mushrooms using GC-MS. 相似文献3.
Tatsuya?MarutaEmail author Ivan?N.?Landjev Assya?Rousseva 《Designs, Codes and Cryptography》2005,34(1):5-15
We denote by mr,q(s) the minimum value of f for which an {f, r-2+s ; r,q }-minihyper exists for r 3, 1 s q–1, where j=(qj+1–1)/(q–1). It is proved that m3,q(s)=1(1+s) for many cases (e.g., for all q 4 when
) and that mr,q(s) r-1+s1+q for 1 s q – 1,~q 3,~r 4. The nonexistence of some [n,k,n+s–qk-2]q codes attaining the Griesmer bound is given as an application.AMS classification: 94B27, 94B05, 51E22, 51E21 相似文献
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From a biologically active fraction of extract from the fungus Fomitopsis pinicola, a new lanostane triterpene was isolated, 3alpha-acetyloxylanosta-8,24-diene-21-ol (1), along with two known triterpenic acids, (2) and (3). The structures of the compounds were elucidated based on their spectral properties. [structure: see text] 相似文献
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