@article {574,
	title = {Complementary on-line preconcentration strategies for steroids by capillary electrophoresis},
	journal = {Journal of Chromatography A},
	volume = {1013},
	number = {1-2},
	year = {2003},
	note = {ISI Document Delivery No.: 727KJTimes Cited: 47Cited Reference Count: 4416th International Symposium on Microscale Separation and AnalysisJAN 17-22, 2003SAN DIEGO, CALIFORNIA},
	month = {Sep},
	pages = {65-76},
	type = {Proceedings Paper},
	abstract = {Complementary on-line preconcentration strategies are needed when analyzing different classes of solutes in real samples by capillary electrophoresis (CE) with UV detection. The performance of three different on-line preconcentration (focusing) techniques under alkaline conditions was examined in terms of their selectivity and sensitivity enhancement for a group of steroids, including classes of androgens, corticosteroids and estrogens. Electrokinetic focusing of large sample injection plugs (up to 28\% of effective capillary length or 22.1 cm) directly on-capillary can be tuned for specific classes of steroids based on changes in their mobility (velocity) using a multi-section electrolyte system in CE. A dynamic pH junction was applied for the selective resolution and focusing of weakly acidic estrogens using borate, pH 11.0 and pH 8.0 in the background electrolyte and the sample, respectively. Sweeping, using an anionic bile acid surfactant and neutral gamma-cyclodextrin (gamma-CD) under alkaline conditions (pH 8), resulted in focusing and separation of the moderately hydrophobic (non-ionic) classes of steroids, such as androgen and corticosteroids. Optimal focusing and resolution of all test steroids under a single buffer condition was realized by a dynamic pH junction-sweeping format using borate, pH 11.0 and bile acid surfactant with gamma-CD in the BGE, whereas the sample is devoid of surfactant at pH 8.0. The design of selective on-line focusing strategies in CE is highlighted by the analysis of microgram amounts of ethynyl estradiol derived from a female contraceptive pill extract using the dynamic pH junction method, which resulted in over a 100-fold enhancement in concentration sensitivity. (C) 2003 Elsevier B.V. All rights reserved.},
	keywords = {dynamic pH, dynamic pH junction, EPINEPHRINE, FLUORESCENCE DETECTION, INDUCED, INJECTION, MICELLAR ELECTROKINETIC CHROMATOGRAPHY, NEUTRAL ANALYTES, sample preparation, SAMPLE SELF-STACKING, SEPARATION, steroids, sweeping, TAURODEOXYCHOLATE, ZONE-ELECTROPHORESIS},
	isbn = {0021-9673},
	url = {<Go to ISI>://000185656900009},
	author = {Britz-McKibbin, P. and Ichihashi, T. and Tsubota, K. and Chen, D. D. Y. and Terabe, S.}
}
@article {3174,
	title = {EFFECT OF CONTIGNASTEROL ON HISTAMINE-RELEASE INDUCED BY ANTIIMMUNOGLOBULIN-E FROM RAT PERITONEAL MAST-CELLS},
	journal = {Journal of Pharmaceutical Sciences},
	volume = {83},
	number = {9},
	year = {1994},
	note = {ISI Document Delivery No.: PF413Times Cited: 26Cited Reference Count: 9},
	month = {Sep},
	pages = {1234-1235},
	type = {Article},
	abstract = {In rat peritoneal mass cells induced by anti-immunoglobulin E (anti-IgE), contignasterol (1) inhibited histamine release in a dose-dependent manner. On the other hand, a reduction product of contignasterol (2) did not inhibit histamine release from mast cells induced by anti-IgE.},
	keywords = {SPONGE, steroids},
	isbn = {0022-3549},
	url = {<Go to ISI>://A1994PF41300008},
	author = {Takei, M. and Burgoyne, D. L. and Andersen, R. J.}
}
@article {2901,
	title = {BLANCASTEROL, A CYTOTOXIC 9,11-SECOSTEROID ISOLATED FROM THE NORTHEASTERN PACIFIC MARINE SPONGE PLERAPLYSILLA SP},
	journal = {Tetrahedron},
	volume = {49},
	number = {39},
	year = {1993},
	note = {ISI Document Delivery No.: LY711Times Cited: 17Cited Reference Count: 11},
	month = {Sep},
	pages = {8757-8760},
	type = {Article},
	abstract = {Blancasterol (1), a cytotoxic 9,11-secosteroid, has been isolated from the marine sponge Pleraplysilla sp. collected off the coast of Vancouver Island. The structure of blancasterol (1) was solved by analysis of spectroscopic data.},
	keywords = {steroids},
	isbn = {0040-4020},
	url = {<Go to ISI>://A1993LY71100005},
	author = {Pika, J. and Andersen, R. J.}
}
