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

scholarly journals ADSORPTION OF GIBBERELLIC ACID ONTO NATURAL KAOLIN FROM TATAKAN, SOUTH KALIMANTAN

2010 ◽  
Vol 9 (3) ◽  
pp. 373-379 ◽  
Author(s):  
Sunardi Sunardi ◽  
Yateman Arryanto ◽  
Sutarno Sutarno
Keyword(s):  
Adsorption Isotherm ◽  
Gibberellic Acid ◽  
Adsorption Capacity ◽  
Contact Time ◽  
Adsorption Process ◽  
Langmuir Adsorption Isotherm ◽  
Purification Process ◽  
X Ray ◽  
Langmuir Adsorption ◽  
Batch System

Adsorption of gibberellic acid (GA3) onto raw and purified kaolin from Tatakan, South Kalimantan was investigated in this study. Purification process was done by sedimentation to obtain relative pure kaolinite. Raw and purified kaolin samples were characterized by Fourier transformed infrared (FTIR) spectroscopy and X-ray diffractometer (XRD). The adsorption process was carried out in a batch system and the effect of pH, contact time and GA3 concentration were experimentally studied to evaluate the adsorption capacity. The amount of GA3 adsorbed was determined by UV spectrophotometer. The result showed that the raw kaolin from South Kalimantan consist of 53.36% kaolinite, 29.47% halloysite, 4.47% chlorite, 11.32% quartz and 1.38% christobalite and the purified kaolin consist of 73.03% kaolinite, 22.6% halloysite, 0.77% chlorite, 1.37% quartz and 2.23% christobalite Adsorption experimental indicate that the optimum adsorption took place at pH 7 and contact time for 4 h. Adsorption of GA3 was described by the Langmuir adsorption isotherm model with adsorption capacity of 8.91 mg/g on raw kaolin and 10.38 mg/g on purified kaolin.   Keywords: kaolin, gibberellic acid, adsorption

Action of gibberellic acid in a dwarf maize mutant: an X-ray microanalysis study

1980 ◽  
Vol 120 (1) ◽  
pp. 73-84 ◽  
Author(s):  
D. Neumann ◽  
A. G. S. Jánossy
Keyword(s):  
Gibberellic Acid ◽  
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 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
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