Fungal metabolites. Part IV. The structure of ergoflavin: X-ray analysis of tetra-O-methylergoflavin di-p-iodobenzoate

1966 ◽  
pp. 18 ◽  
Author(s):  
A. T. McPhail ◽  
G. A. Sim ◽  
J. D. M. Asher ◽  
J. Monteath Robertson ◽  
J. V. Silverton
Keyword(s):  
Fungal Metabolites ◽  
X Ray

Fungal metabolites. Part VII. Stereochemistry of gibberellic acid: X-ray analysis of methyl bromogibberellate

1966 ◽  
pp. 1577 ◽  
Author(s):  
F. McCapra ◽  
A. T. McPhail ◽  
A. I. Scott ◽  
G. A. Sim ◽  
D. W. Young
Keyword(s):  
Gibberellic Acid ◽  
Fungal Metabolites ◽  
X Ray

Novel sesquiterpenoids from the fairy ring fungus, Marasmiusoreades

1989 ◽  
Vol 67 (5) ◽  
pp. 773-778 ◽  
Author(s):  
William A. Ayer ◽  
Peter A. Craw ◽  
Thomas J. Stout ◽  
Jon Clardy
Keyword(s):  
Crystal Structure ◽  
Hydroxyl Groups ◽  
Spectroscopic Methods ◽  
Fungal Metabolites ◽  
Liquid Cultures ◽  
X Ray ◽  
Crystallographic Study

The structures of four new drimane-type sesquiterpenes 1–4 produced in liquid cultures of the fairy ring fungus, Marasmiusoreades, have been determined by a combination of chemical and spectroscopic methods. The structure assigned to one of these sesquiterpenes (1) has been confirmed by an X-ray crystallographic study. An unprecedented feature of all four sesquiterpenes is the biosynthetic elaboration of C8–C12 and C15 of the drimane skeleton to a dioxabicyclooctane moiety. In addition, two of the sesquiterpenes possess an uncommon α orientation of the hydroxyl groups at C3. Keywords: sesquiterpenes, fungal metabolites, drimanes, fairy ring mushroom, crystal structure.

Fungal metabolites Part 9. Isolation and X-Ray structure determination of alternarian acid from Alternaria mali Sp.

Tetrahedron ◽  
1984 ◽  
Vol 40 (13) ◽  
pp. 2451-2455 ◽  
Author(s):  
Derek J. Chadwick ◽  
Ian W. Easton ◽  
Robert A.W. Johnstone
Keyword(s):  
Structure Determination ◽  
Fungal Metabolites ◽  
X Ray

Space and Time Distribution of Hard X-Ray Emission in a Loop at the Beginning of a Flare

1994 ◽  
Vol 144 ◽  
pp. 275-277
Author(s):  
M. Karlický ◽  
J. C. Hénoux
Keyword(s):  
Time Distribution ◽  
Electron Bombardment ◽  
Spatial Evolution ◽  
Superthermal Electrons ◽  
Flare Loop ◽  
X Ray ◽  
Superthermal Electron ◽  
Flare Loops ◽  
Chromospheric Evaporation ◽  
Temporal And Spatial

AbstractUsing a new ID hybrid model of the electron bombardment in flare loops, we study not only the evolution of densities, plasma velocities and temperatures in the loop, but also the temporal and spatial evolution of hard X-ray emission. In the present paper a continuous bombardment by electrons isotropically accelerated at the top of flare loop with a power-law injection distribution function is considered. The computations include the effects of the return-current that reduces significantly the depth of the chromospheric layer which is evaporated. The present modelling is made with superthermal electron parameters corresponding to the classical resistivity regime for an input energy flux of superthermal electrons of 109erg cm−2s−1. It was found that due to the electron bombardment the two chromospheric evaporation waves are generated at both feet of the loop and they propagate up to the top, where they collide and cause temporary density and hard X-ray enhancements.

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