Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Dennis Barrett"'
Autor:
Dennis Barrett
In this thesis we consider nonholonomic Riemannian manifolds, and in particular, left- invariant nonholonomic Riemannian structures on Lie groups. These structures are closely related to mechanical systems with (positive definite) quadratic Lagrangia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::763ee3c24db09c678ed6d5f360b19343
https://doi.org/10.21504/10962/7554
https://doi.org/10.21504/10962/7554
Autor:
Hayden S, Wool, Dennis, Barrett
Publikováno v:
Medical economics. 92(7)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::05bb2304c7734bd4f1de3299d63847a1
https://pubmed.ncbi.nlm.nih.gov/26298996
https://pubmed.ncbi.nlm.nih.gov/26298996
Properties of vacuum residual fractions from Australian shale oils compared with a petroleum bitumen
Publikováno v:
Fuel. 69:267-269
Crude shale oils derived from oil shale deposits at Julia Creek, Stuart and Rundle in Australia were processed to produce vacuum residual bitumens. The properties of these bitumens were compared with those of a petroleum bitumen. All were subjected t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d816f9b2adb990ebb5f07df7bc57ba0
https://doi.org/10.1016/0016-2361(90)90188-v
https://doi.org/10.1016/0016-2361(90)90188-v
Autor:
Dennis Barrett, Thomas D. Yager
Publikováno v:
Biochimica et Biophysica Acta (BBA) - General Subjects. 802:215-220
We have studied the kinetics with which proteins are coupled to CNBr-agarose beads. We find that coupling can be represented adequately by a rate equation which is firt-order in protein concentration and first-order in the ‘concentration’ of bead
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b3780bc99c9ba87b17264d78007cb05
https://doi.org/10.1016/0304-4165(84)90164-8
https://doi.org/10.1016/0304-4165(84)90164-8
Autor:
Dennis Barrett, Nancy A. Davidson
Publikováno v:
Journal of Insect Physiology. 21:1447-1452
Xanthine dehydrogenase activity is assayed by following the oxidation of pterin to isoxanthopterin by spectrofluorometry at the reaction's wavelength peaks: excitation, 344 nm; emission, 412 nm. The method is sensitive to less than 0·1 μU of activi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f43fe64c04eef15bf5232305e094af8a
https://doi.org/10.1016/0022-1910(75)90206-1
https://doi.org/10.1016/0022-1910(75)90206-1
Autor:
Dennis Barrett
Publikováno v:
Developmental Biology. 10:289-304
Xanthine dehydrogenase and uricase, enzymes acting sequentially in purine oxidation, were detected in very low concentration in all tissues and stages of frog development examined. Relatively high concentrations of both enzymes, 50–1000 times the b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea9698f7071eaacabb4148ce7a262ae7
https://doi.org/10.1016/0012-1606(64)90046-6
https://doi.org/10.1016/0012-1606(64)90046-6
Publikováno v:
Archives of biochemistry and biophysics. 182(2)
The supernatant above hatched sea urchin ( Strongylocentrotus purpuratus ) blastulae contains crude hatching protease, which is heterogeneous in molecular weight, solubility, charge, and density. It requires urea treatment (6 m , 22 °C, 6 h) to diss
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6be968ee1176466fca02b058c93615b3
https://pubmed.ncbi.nlm.nih.gov/20058
https://pubmed.ncbi.nlm.nih.gov/20058
Autor:
Dennis Barrett, Ben F. Edwards
Publisher Summary During the first few minutes after fertilization, the sea urchin egg constructs a tough protective extracellular coat, the fertilization envelope. Some 6–20 hour later, depending on species and temperature, the embryo, now a blast
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::81e6e12df749fec071d145f67f15299f
https://doi.org/10.1016/s0076-6879(76)45032-2
https://doi.org/10.1016/s0076-6879(76)45032-2
Autor:
Dennis Barrett
Publikováno v:
The Biochemical journal. 117(1)
A protease, ‘trypsinogenase’, secreted in small amounts by the sea-urchin blastula, is assayed in two steps as an example of enzyme-amplifying kinetics. In reaction 1 the trypsinogenase catalyses the activation of trypsinogen to trypsin. In react
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b2733ff87f9c2dd7391fa235d419fef4
https://pubmed.ncbi.nlm.nih.gov/5420957
https://pubmed.ncbi.nlm.nih.gov/5420957
Publikováno v:
Archives of biochemistry and biophysics. 143(1)
Hatching enzyme from hatching Strongylocentrotus purpuratus blastulae is physically heterogeneous. (1) Salt fractionation and gel electrophoresis both reveal a dispersion of enzyme activity. (2) Gel filtration in 0.5 m salt gives a mol wt of ca . 150
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bcc7adb914377dfdfecb4b6dd5a676f
https://pubmed.ncbi.nlm.nih.gov/5561747
https://pubmed.ncbi.nlm.nih.gov/5561747