Zobrazeno 1 - 10
of 13
pro vyhledávání: '"John R. Ellison"'
Publikováno v:
American Journal of Botany. 78:1238-1243
Nuclear 2C DNA content was determined by laser flow cytometry for 13 diploid (2n = 34) lines (cultivated varieties and inbred lines) of Helianthus annuus. Mean DNA amount of second leaf nuclei varied from 6.01 to 7.95 pg (32%) among lines. Mean DNA c
Publikováno v:
American Journal of Botany. 78:183-188
(...) Nuclei stained with propidium iodide, isolated from chopped plant leaves, were passed through an Ortho Cytofluorograph with a Lexel model 95 argon laser (514 nm) and the fluorescence measured, integrated, and recorded using an Ortho 2140 Data A
Publikováno v:
Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology. 1(1)
Haplopappus gracilis (n = 2), Haplopappus ravenii (n = 4), and Haplopappus wigginsii (n = 4) are isolated by F1 hybrid sterility due mainly to translocation heterozygosity. There is no evidence that this can be overcome at the diploid level so that i
Autor:
Gary C. Howard, John R. Ellison
Publikováno v:
Chromosoma. 83:555-561
Examination of early embryos of Drosophila virilis by light and electron microscopy has shown that the A-T rich satellite DNA sequences have a non-random distribution within the nuclei. As observed by 33258 Hoechst staining and fluorescent microscopy
Autor:
John E. Mayfield, John R. Ellison
Publikováno v:
Chromosoma. 52:37-48
Cytological evidence is presented which shows that for Drosophila virilis and Samoaia leonensis at least, each satellite DNA is condensed into a distinct heterochromatic mass during interphase. This is seen as just one example of a general phenomenon
Autor:
Emma Nan Hampton, John R. Ellison
Publikováno v:
Journal of Insect Physiology. 28:731-736
A method of age determination of adult screwworm flies is described and documented. This method uses the diurnal differences in the deposition of apodeme layers as a basis for counting the age in days since eclosion. The method is accurate to plus or
Autor:
John E. Mayfield, John R. Ellison
Publikováno v:
Chromosoma. 54:27-31
Nuclei from various mouse tissues exhibit a pattern of fluorescence characteristic of the cell type when stained with the fluorescent compound Hoechst 33258. When such preparations are hybridized in situ with 3H-RNA complementary to the A-T rich sate
Autor:
John R. Ellison, H. J. Barr
Publikováno v:
Chromosoma. 39:53-61
Using genetically controlled stocks ofDrosophila melanogaster we have compared the frequency of ectopic pairing in a line showing intense quinacrine fluorescence at two sites (81F and 83E) on chromosome 3 with one showing such fluorescence at only on
Publikováno v:
Journal of Economic Entomology. 74:241-243
Three cytological techniques for distinguishing normal from irradiated males of Cochliomyia hominivorax (Coquerel) have been evaluated for ease and accuracy. Staining whole testes with Schiff’s reagent revealed an area of deeply staining spermatogo
Publikováno v:
Differentiation; research in biological diversity. 26(1)
Immune cytolysis and immunofluorescence were used to examine chicken fetal antigen CFA) and chicken adult antigen (CAA) expression on the differentiation/maturation series of definitive erythroid cells obtained from the bone marrow of different aged