Long-Term Stability of Aqueous Solutions of Luteinizing Hormone-Releasing Hormone Assessed by an In Vitro Bioassay and Liquid Chromatography

1984 ◽  
Vol 73 (6) ◽  
pp. 819-821 ◽  
Author(s):  
Yi-Fan Shi ◽  
Richard J. Sherins ◽  
David Brightwell ◽  
Joseph F. Gallelli ◽  
Dulal C. Chatterji
Keyword(s):  
Liquid Chromatography ◽  
Luteinizing Hormone ◽  
Aqueous Solutions ◽  
In Vitro Bioassay ◽  
Luteinizing Hormone Releasing Hormone ◽  
Releasing Hormone ◽  
Term Stability ◽  
Long Term Stability

Involvement of H1 Histamine Receptor in Basal and Estrogen-Stimulated Luteinizing Hormone-Releasing Hormone Secretion in Rats in vitro

1987 ◽  
Vol 45 (3) ◽  
pp. 191-196 ◽  
Author(s):  
Akira Miyake ◽  
Shirou Ohtsuka ◽  
Takamichi Nishizaki ◽  
Keiichi Tasaka ◽  
Toshihiro Aono ◽  
...  
Keyword(s):  
Luteinizing Hormone ◽  
Hormone Secretion ◽  
Histamine Receptor ◽  
Luteinizing Hormone Releasing Hormone ◽  
Releasing Hormone

scholarly journals Long-Term Stability of a RAFT-Modified Bulk-Fill Resin-Composite under Clinically Relevant versus ISO-Curing Conditions

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5350
Author(s):  
Niklas Graf ◽  
Nicoleta Ilie
Keyword(s):  
Fracture Mechanism ◽  
Resin Composite ◽  
Bending Test ◽  
Depth Sensing ◽  
Matrix Formulation ◽  
Curing Conditions ◽  
Term Stability ◽  
Long Term Stability

The addition of RAFT (reversible addition-fragmentation chain transfer) agents to the matrix formulation of a bulk-fill resin composite can significantly decrease the required curing time down to a minimum of 3 s. Evaluating the long term-stability of this resin composite in relation to varied curing conditions in an in-vitro environment was this study’s goal. Specimens were produced according to either an ISO or one of two clinical curing protocols and underwent a maximum of three successive aging procedures. After each one of the aging procedures, 30 specimens for each curing condition were extracted for a three-point bending test. Fragments were then stereo-microscopically characterized according to their fracture mechanism. Weibull analysis was used to quantify the reliability of each aging and curing combination. Selected fragments (n = 12) underwent further testing via depth-sensing indentation. Mechanical values for either standardized or clinical curing were mostly comparable. However, changes in fracture mechanism and Weibull modulus were observed after each aging procedure. The final procedure exposed significant differences in the mechanical values due to curing conditions. Curing conditions with increased radiant exposure seemingly result in a higher crosslink in the polymer-matrix, thus increasing resistance to aging. Yet, the clinical curing conditions still resulted in acceptable mechanical values, proving the effectiveness of RAFT-polymerization.

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