Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Joh. Blok"'
Publikováno v:
Tellus A; Vol 11, No 4 (1959)
Sartryck ur Tellus, 4, 404-407
Sartryck ur Tellus, 4, 404-407
The artificial radioactivity in rain was measured as a function of rainfall rate. As a rule an inverse relationship was found between the specific activity and the rate of rainfall. A tentative explanation is given. DOI: 10.1111/j.2153-3490.1959.tb00
Publikováno v:
International Journal of Radiation Biology and Related Studies in Physics, Chemistry and Medicine. 27:197-200
Publikováno v:
Biopolymers. 25:1419-1448
The CD and absorption (OD) spectra of single-stranded nucleic acids in complex with the helix-destabilizing protein of either bacteriophage T4 (GP32) or bacteriophage fd (GP5) show similar and unusual features for all polynucleotides investigated. Th
Publikováno v:
International Journal of Radiation Biology and Related Studies in Physics, Chemistry and Medicine. 47:309-317
A derivation is given for the dependence of the rate constant of the reaction of OH radicals with a spherical macromolecule on the rate by which such radicals are scavenged by the medium. Experiments were carried out with oxygenated solutions of dilu
Autor:
R. van Grondelle, J.G. Westra, J. T. Bokma, Joh. Blok, L. P.A. van Houte, J.T. Lutgerink, J. Retèl
Publikováno v:
Carcinogenesis. 8:759-766
Calf thymus DNA was modified with 2-aminofluorene (AF) to different extents by treatment with N-hydroxy-2-aminofluorene. The AF-modified DNAs together with free AF, the AF-modified guanine (Gua-C8-AF) and the AF-modified deoxyguanosine (dGuo-C8-AF) w
Publikováno v:
Journal of Biomolecular Structure and Dynamics. 2:821-829
The conformation of single stranded polynucleotides is changed specifically upon binding of the helix destabilizing protein of bacteriophage T4 (GP32). On the basis of circular dichroism (CD) and absorption experiments it is shown that denaturing con
Transient electric birefringence of T-even bacteriophages. IV. T2L0 and T6 with extended tail fibers
Publikováno v:
Biopolymers. 17:2689-2702
Transient electric birefringence measurements of the bacteriophages T2L0 and T6 were performed under such conditions that the tail fibers are extended. The data obtained are compared to previously reported data for T4B. For all T-even phages the degr
Publikováno v:
International Journal of Radiation Biology and Related Studies in Physics, Chemistry and Medicine. 22:579-587
SummaryAqueous solutions of the double-stranded form of ΦX174 DNA have been irradiated with γ-rays in the presence of phenylalanine. Evidence is presented showing that under these circumstances DNA inactivation is largely due to secondary amino aci
Autor:
Joh. Blok, L. H. Luthjens
Publikováno v:
International Journal of Radiation Biology and Related Studies in Physics, Chemistry and Medicine. 16:101-111
SummarySuspensions of bacteriophage T4 in 25 mM phosphate buffer, pH 7·1, were irradiated with 60Co γ-rays. Measurements of the viscosity of irradiated samples before and after treatment with DNA-ase and trypsin showed that DNA is released from dam
Publikováno v:
Journal of Geophysical Research. 66:135-141
Some results of measurements are presented pertaining to the maximum of fall-out which was observed during the spring of the last few years. Evidence is presented that the height of this maximum is chiefly determined by the amount of radioactive debr