Reference high-efficiency nonpolar packed columns for the gas—liquid chromatography of nanogram amounts of steroids part I. Retention time data

1968 ◽  
Vol 38 ◽  
pp. 439-459 ◽  
Author(s):  
Frantz A. Vandenheuvel ◽  
A.Sally Court
Keyword(s):  
Liquid Chromatography ◽  
Retention Time ◽  
High Efficiency ◽  
Packed Columns ◽  
Gas Liquid Chromatography ◽  
Time Data

Sorbents with cross-linked polysiloxane phases for gas—liquid chromatography with packed columns

1990 ◽  
Vol 509 (1) ◽  
pp. 85-91 ◽  
Author(s):  
V.G. Berezkin ◽  
K.N. Shukurova ◽  
V.R. Alishoev ◽  
E.Yu. Sorokina ◽  
F.G. Shaligin ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Packed Columns ◽  
Gas Liquid Chromatography

Classification of some dermatophytes by pyrolysis–gas–liquid chromatography

1973 ◽  
Vol 19 (4) ◽  
pp. 403-407 ◽  
Author(s):  
J. W. Carmichael ◽  
Awatar S. Sekhon ◽  
Lynne Sigler
Keyword(s):  
Liquid Chromatography ◽  
Mating Type ◽  
Retention Time ◽  
Gas Liquid Chromatography ◽  
Mating Types ◽  
Random Drift ◽  
Characteristic Peak ◽  
Pyrolysis Gas ◽  
Arthroderma Benhamiae

Samples from dried colonies of 21 strains of Nannizzia and Arthroderma were analyzed by pyrolysis–gas–liquid chromatography. Characteristic peak patterns produced by all the strains were used as markers to correct random drift in retention time so that corresponding peaks in different pyrograms could be homologized. Variation in sample size was compensated for by comparing peaks on each pyrogram with a particular major component and scoring them simply as 0 (absent), 1 (small), or 2 (large). Proximities were calculated and analyzed for clusters by the TAXMAP procedure. The analysis always grouped replicate samples together in the same cluster. Opposite mating types of the same species were sometimes placed in the same cluster and sometimes in separate clusters. The (+) mating type of Arthroderma benhamiae was placed in a cluster with both mating types of Nannizzia gypsea and N. obtusa, while the (−) mating type replicates of A. benhamiae were placed in a cluster by themselves. Finding a greater difference between pyrograms of different mating types of one species than between pyrograms of different species was unexpected and requires further investigation.

Biosynthesis of Gibberellins in Barley and Dwarf Rice Seedlings

1974 ◽  
Vol 1 (2) ◽  
pp. 199 ◽  
Author(s):  
KF Faull ◽  
BG Coombe ◽  
LG Paleg
Keyword(s):  
Biological Activity ◽  
Liquid Chromatography ◽  
Retention Time ◽  
De Novo ◽  
Mevalonic Acid ◽  
Biologically Active ◽  
Gas Liquid Chromatography ◽  
Rice Seedlings ◽  
Kaurenoic Acid ◽  
Gibberellin A1

Incorporation studies with 14 CO2 suggested that 11-day-old barley seedlings biosynthesized an A1- like gibberellin de novo and that the biosynthesized gibberellin completely turned over within 12 h. Exogenous [14C]mevalonic acid, supplied in a variety of ways, was not incorporated into the gibberellins of barley seedlings. Barley seedlings, which failed to elongate in response to exogenous ent-kaurenoic acid, metabolized exogenous [17-14C]ent-kaurenoic acid to a few compounds, but not to a biologically active gibberellin. Dwarf rice seedlings (cv. Tan-ginbozu), which elongated in response to exogenous ent-kaurenoic acid, metabolized exogenous [17-14C]ent-kaurenoic acid to a number of radioactive compounds, one of which behaved like [14C]gibberellin A1 in that it showed radioactivity and biological activity at the expected retention time during gas-liquid chromatography.

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