Dose-response characteristics of an amorphous silicon EPID

2005 ◽  
Vol 32 (10) ◽  
pp. 3095-3105 ◽  
Author(s):  
Peter Winkler ◽  
Alfred Hefner ◽  
Dietmar Georg
Keyword(s):  
Amorphous Silicon ◽  
Dose Response ◽  
Response Characteristics

Varying dose–response characteristics of different immunoassays and an in-vitro bioassay for FSH are responsible for changing ratios of biologically active to immunologically active FSH

1990 ◽  
Vol 127 (3) ◽  
pp. 523-532 ◽  
Author(s):  
F. Jockenhövel ◽  
S. A. Khan ◽  
E. Nieschlag
Keyword(s):  
Sertoli Cell ◽  
Dose Response ◽  
Serum Levels ◽  
Biologically Active ◽  
Testicular Function ◽  
In Vitro Bioassay ◽  
Great Caution ◽  
Response Characteristics ◽  
Infertile Men

ABSTRACT Serum FSH levels in fertile and infertile men were determined by applying the Sertoli cell in-vitro bioassay and six different immunoassays. Bioassay and immunoassay estimates were significantly correlated (r ranging from 0·78 to 0·86; P<0·01). On average, all immunoassays measured lower FSH concentrations in samples with low FSH levels and higher FSH concentrations in those with high FSH levels compared with the bioassay. Ratios of bioactivity to immunoreactivity (B/I) were highest in fertile men and lowest in men with severe disturbances of testicular function. Depending on which immunoassay was used these differences were either significant or only marginal. Dose–response characteristics for WHO FSH standard preparation 78/549, used in the bioassay as well as in the immunoassays, were different between immunoassays and the bioassay, suggesting that decreasing B/I ratios with increasing FSH serum levels were method-related and reflected different slopes of the dose–response characteristics of the assays, rather than being true changes in the molecular composition of FSH. The present investigation underlines the necessity of choosing the immunoassay used for comparison with the bioassay carefully and of validating the system in regard to parallelism between dose–response characteristics. B/I ratios must be interpreted with great caution and previous studies which report changing B/I ratios in various endocrine situations may have to be reevaluated. Journal of Endocrinology (1990) 127, 523–532

scholarly journals Short-Term Dose–Response Characteristics of 2-Iminobiotin Immediately Postinsult in the Neonatal Piglet After Hypoxia-Ischemia

Stroke ◽  
2013 ◽  
Vol 44 (3) ◽  
pp. 809-811 ◽  
Author(s):  
S. Tracey Bjorkman ◽  
Zoe Ireland ◽  
Xiyong Fan ◽  
Willem M. van der Wal ◽  
Kit C.B. Roes ◽  
...  
Keyword(s):  
Dose Response ◽  
Short Term ◽  
Response Characteristics ◽  
Neonatal Piglet ◽  
Hypoxia Ischemia
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