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1.

Mycotoxins produced by Aspergillus fumigatus species isolated from molded silage.

Cole, R J; Kirksey, J W; Dorner, J W; Wilson, D M; Johnson, J C; Johnson, A N; Bedell, D M; Springer, J P; Chexal, K K; Clardy, J C; Cox, R H.

J Agric Food Chem ; 25(4): 826-30, 1977.

Article in English | MEDLINE | ID: mdl-328548

Subject(s)

Animal Feed/analysis , Aspergillus fumigatus/metabolism , Mycotoxins/isolation & purification , Silage/analysis , Zea mays/analysis

2.

Mycotoxins produced by Aspergillus fumigatus isolated from silage.

Cole, R J; Kirksey, J W; Dorner, J W; Wilson, D M; Johnson, J; Bedell, D; Springer, J P; Chexal, K K; Clardy, J; Cox, R H.

Ann Nutr Aliment ; 31(4-6): 685-91, 1977.

Article in English | MEDLINE | ID: mdl-350117

ABSTRACT

Results are presented which show that Aspergillus fumigatus was one of the predominant fungi contaminating moldy silage. Growth of A. fumigatus on silage appeared to depend on a preliminary aerobic fermentation by other natural microflora in silage. The clavine alkaloid, fumigaclavine A, and a new clavine alkaloid designated fumigaclavine C were produced by A. fumigatus. The LD50 of fumigaclavine C was approximately 150 mg/kg oral dose in day-old cockerels.

Subject(s)

Animal Feed , Aspergillus fumigatus/metabolism , Food Microbiology , Mycotoxins/biosynthesis , Silage , Animals , Chickens , Lethal Dose 50 , Male , Mycotoxins/isolation & purification

3.

Austin, a novel polyisoprenoid mycotoxin from Aspergillus ustus.

Chexal, K K; Spinger, J P; Clardy, J; Cole, R J; Kirksey, J W; Dorner, J W; Cutler, H G; Strawter, B J.

J Am Chem Soc ; 98(21): 6748, 1976 Oct 13.

Article in English | MEDLINE | ID: mdl-972231

Subject(s)

Aspergillus/metabolism , Mycotoxins/isolation & purification , Terpenes/isolation & purification , Chemical Phenomena , Chemistry

4.

The biosynthesis of fungal metabolites. Part VIII. Identification of N-benzoyl-L-phenylalanyl-L-phenylalaninol acetate, a metabolite of Aspergillus glaucus.

Cox, R E; Chexal, K K; Holker, J S.

J Chem Soc Perkin 1 ; (5): 578-88, 1976.

Article in English | MEDLINE | ID: mdl-943409

Subject(s)

Aspergillus/metabolism , Dipeptides/isolation & purification , Methods , Phenylacetates/isolation & purification , Phenylalanine/analogs & derivatives , Spectrum Analysis

5.

Amino-acids and peptides Part XVI. Synthesis of cyclo-[L-(alpha-amino)-beta-alanylglycyl-D-(alpha-amino)-beta-alanylglycyl] and related fourteen-membered cyclotetrapeptides.

Hassall, C H; Tyson, R G; Chexal, K K.

J Chem Soc Perkin 1 ; (19): 2010-3, 1976.

Article in English | MEDLINE | ID: mdl-1033192

Subject(s)

Oligopeptides/chemical synthesis , Peptides, Cyclic/chemical synthesis , Amino Acid Sequence , Methods

6.

Amino-acids and peptides. Part XVIII. Studies relating to the synthesis and conformation of a novel bicyclic peptide system.

Chexal, K K; Handa, B K; Hassall, C H; Thomas, W A.

J Chem Soc Perkin 1 ; (19): 2019-24, 1976.

Article in English | MEDLINE | ID: mdl-1033194

Subject(s)

Peptides, Cyclic/chemical synthesis , Amino Acid Sequence , Magnetic Resonance Spectroscopy , Protein Conformation , X-Ray Diffraction

7.

The biosynthesis of fungal metabolites. Part VI. Structures and biosynthesis of some minor metabolites from variant strains of Aspergillus variecolor.

Chexal, K K; Holker, J S; Simpson, T J.

J Chem Soc Perkin 1 ; (6): 549-54, 1975.

Article in English | MEDLINE | ID: mdl-1170194

Subject(s)

Aspergillus/metabolism , Benzopyrans/biosynthesis , Dibenzoxepins/biosynthesis , Xanthenes/biosynthesis

8.

The biosynthesis of fungal metabolites. Part V. Structure of variecoxanthones A, B, and C, metabolites of Aspergillus variecolor; conversion of variecoxanthone a into (plus or minus)-de-c-prenylepishamixanthone.

Chexal, K K; Holker, J S; Simpson, T J; Young, K.

J Chem Soc Perkin 1 ; (6): 543-8, 1975.

Article in English | MEDLINE | ID: mdl-1170193

Subject(s)

Aspergillus/metabolism , Xanthenes/biosynthesis , Ketones/biosynthesis

9.

The biosynthesis of fungal metabolites. Part VII. Production and biosynthesis of 4,7-dimethoxy-5-methylcoumarin in Aspergillus variecolor.

Chexal, K K; Fouweather, C; Holker, J S.

J Chem Soc Perkin 1 ; (6): 554-6, 1975.

Article in English | MEDLINE | ID: mdl-1170195

Subject(s)

Aspergillus/metabolism , Coumarins/biosynthesis , Methyl Ethers/biosynthesis

10.

Thin-layer chromatography of biflavonyls on silica gel. Structure-chromatographic behaviour correlations.

Chexal, K K; Handa, B K; Rahman, W.

J Chromatogr ; 48(3): 484-92, 1970 May 06.

Article in English | MEDLINE | ID: mdl-5445097

Subject(s)

Chromatography, Thin Layer , Flavonoids/analysis , Chemical Phenomena , Chemistry , Methylation , Plant Extracts/analysis , Stereoisomerism

11.

Some optically active biflavones from Podocarpus gracilior.

Chexal, K K; Handa, B K; Rahman, W.

Chem Ind ; 1: 28, 1970 Jan 03.

Article in English | MEDLINE | ID: mdl-5412978

Subject(s)

Flavonoids/isolation & purification , Plants/analysis , Chemical Phenomena , Chemistry , Optical Rotatory Dispersion

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