Dielectric relaxation of styrene-isoprene diblock copolymer solutions: a common solvent system

1992 ◽  
Vol 25 (6) ◽  
pp. 1699-1704 ◽  
Author(s):  
Ming Long Yao ◽  
Hiroshi Watanabe ◽  
Keiichiro Adachi ◽  
Tadao Kotaka
Keyword(s):  
Dielectric Relaxation ◽  
Diblock Copolymer ◽  
Solvent System

Dielectric relaxation of styrene-isoprene diblock copolymer solutions: a selective solvent system

1991 ◽  
Vol 24 (23) ◽  
pp. 6175-6181 ◽  
Author(s):  
Ming Long Yao ◽  
Hiroshi Watanabe ◽  
Keiichiro Adachi ◽  
Tadao Kotaka
Keyword(s):  
Dielectric Relaxation ◽  
Diblock Copolymer ◽  
Solvent System ◽  
Selective Solvent

Fractionation of a diblock copolymer in a demixing-solvent system

1993 ◽  
Vol 49 (7) ◽  
pp. 1265-1275 ◽  
Author(s):  
Ji??í Pode??va ◽  
Jaroslav Stejskal ◽  
Pavel Kratochvíl
Keyword(s):  
Diblock Copolymer ◽  
Solvent System

Surface segregation in model symmetric polyolefin diblock copolymer melts

1994 ◽  
Vol 4 (12) ◽  
pp. 2231-2248 ◽  
Author(s):  
Mohan Sikka ◽  
Navjot Singh ◽  
Frank S. Bates ◽  
Alamgir Karim ◽  
Sushil Satija ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Surface Segregation ◽  
Copolymer Melts

STUDIES ON THYROIDAL COLLOID PINOCYTOSIS USING A DOUBLE ISOTOPE TECHNIQUE

1972 ◽  
Vol 70 (1) ◽  
pp. 48-55 ◽  
Author(s):  
Mario A. Pisarev ◽  
Noe Altschuler ◽  
Leslie J. DeGroot
Keyword(s):  
Acid Phosphatase ◽  
Thyroid Hormone ◽  
Trichloroacetic Acid ◽  
Specific Activity ◽  
Acid Precipitation ◽  
Solvent System ◽  
Blood Stream ◽  
Radioactive Materials ◽  
Isotope Technique ◽  
Double Isotope

ABSTRACT The process of secretion of the thyroid hormone involves several steps: pinocytosis of thyroglobulin, fusion of the colloid droplets with the lysosomes, digestion of thyroglobulin by a cathepsin, dehalogenation of tyrosines and release of thyronines into the blood stream. The present paper describes a double isotope technique for studying the first two steps. Thyrotrophin (TSH) administration to rats increased the radioactivity present in all fractions, specially in the 15 000 × g pellet. When the subcellular distribution of acid phosphatase was determined, the highest specific activity was found in this fraction, thus indicating the presence of lysosomes. The content of radioactive materials in the 15 000 × g pellet was analyzed by trichloroacetic acid precipitation and by ascending paper chromatography using n-butanol:ethanol:ammonium hydroxide (5:1:2;v/v) as solvent system. The results obtained showed that 90% of the radioactivity was protein bound and strongly suggest that this material is thyroglobulin.

Sign in / Sign up

Export Citation Format

Share Document