autotrophic and heterotrophic respiration in needle fir and quercus-dominated stands in a cool-temperate forest, central investigate annual variation in soil respiration (r (s)) and its components [autotrophic (r (a)) and heterotrophic (r (h))] in relation to seasonal changes in soil temperature (st) and soil water content (swc) in an abies holophylla stand (stand a) and a quercus-dominated stand (stand q), we set up trenched plots and measured r (s), st and swc for 2 years. the mean annual rate of r (s) was 436 mg co(2) m(-2) h(-1), ranging from 76 to 1,170 mg co(2) m(-2) h(-1), in stand a and 376 mg co(2) m(- ...201020204671
sesquiterpenoids and triterpenoids from abies holophylla and their bioactivities.six previously unreported and 11 known terpenoids were isolated from abies holophylla. the structures of the six compounds were established as two unusual bisabolane sesquiterpenoids, three nortriterpenoids, and one 3,4-seco-triterpenoid based on the detailed analysis of their 1d and 2d nmr spectroscopic data. in addition, electronic circular dichroism (ecd) calculations and molecular orbital (mo) analysis were used to assign the absolute configuration of one bisabolane sesquiterpenoid, abiesesq ...201222169016
bioactive lignans from the trunk of abies holophylla.six new lignans (1-6) were isolated from the trunk of abies holophylla maxim, together with 11 known lignans (7-17). the structures of 1-7 were elucidated by spectroscopic methods, acid hydrolysis, and use of the modified mosher's method. the effects of the isolates on nerve growth factor induction in a c6 rat glioma cell line were evaluated. compounds 6, 7, and 13 showed significant induction of nerve growth factor secretion at concentrations of 10 μm. compounds 1, 5, 6, and 16 showed moderate ...201324224862
comparison of the diversity of basidiomycetes from dead wood of the manchurian fir (abies holophylla) as evaluated by fruiting body collection, mycelial isolation, and 454 this study, three different methods (fruiting body collection, mycelial isolation, and 454 sequencing) were implemented to determine the diversity of wood-inhabiting basidiomycetes from dead manchurian fir (abies holophylla). the three methods recovered similar species richness (26 species from fruiting bodies, 32 species from mycelia, and 32 species from 454 sequencing), but fisher's alpha, shannon-wiener, simpson's diversity indices of fungal communities indicated fruiting body collection a ...201525933635
erratum to: comparison of the diversity of basidiomycetes from dead wood of the manchurian fir (abies holophylla) as evaluated by fruiting body collection, mycelial isolation, and 454 sequencing. 201626318323
diterpenes from the trunk of abies holophylla and their potential neuroprotective and anti-inflammatory activities.eleven new abietane-type diterpenes, holophyllins d-n (1-11), and 17 known analogues (12-28), were isolated from a meoh extract of the trunk of abies holophylla. the chemical structures of 1-11 were determined through spectroscopic data analysis, including nmr ((1)h and (13)c nmr, dept, (1)h-(1)h cosy, hmqc, hmbc, and noesy) and hrfabms methods. all isolated compounds (1-28) were evaluated for their cytotoxicity against four human tumor cell lines (a549, sk-ov-3, sk-mel-2, and hct-116), for thei ...201626812172
holophyllane a: a triterpenoid possessing an unprecedented b-nor-3,4-seco-17,14-friedo-lanostane architecture from abies holophylla.a novel triterpenoid, holophyllane a (1), featuring a b-nor-3,4-seco-17,14-friedo-lanostane, along with its putative precursor, compound 2 were isolated from the methanol extract of the trunks of abies holophylla. the 2d structure and relative configuration of 1 were initially determined via analysis of 1d and 2d nmr spectroscopic data and the assignment was confirmed by quantum mechanics-based nmr chemical shift calculations. the absolute configuration was established by comparison of the exper ...201728252664
comparative analysis of chemical compositions and antimicrobial activities of essential oils from abies holophylla and abies koreana activities of essential oils from abies holophylla and abies koreana.the chemical compositions and antibacterial and antifungal activities of essential oils extracted from abies holophylla and a. koreana were investigated. gc-ms analysis revealed that 38 compounds comprised 95.88% of the a. holophylla essential oil, with the main components being bicyclo[2.2.1]heptan-2-ol (28.05%), delta3-carene (13.85%), alpha-pinene (11.68%), camphene (10.41%), dl-limonene (7.61%), beta-myrcene (7.11%), trans-caryophyllene (5.36%), and alpha- bisabolol (3.67%). in the essential ...200919420993
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