Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Helen D. Hill"'
Autor:
Helen D. Hill
Publikováno v:
Children Australia. 12:18-21
Following the Ash Wednesday bushfires of 1983 it became apparent that communities affected by the fires would require additional resources and support at a local level in the task of helping people recover from disaster. Since experience has shown th
Autor:
Helen D. Hill, W. M. Myers
Publikováno v:
Stain Technology. 20:89-92
Pretreatment at low temperature of root tips of grass grown from tillers in small beakers was found to contract somatic chromosomes and thus facilitate determination of chromosome number. A modification of Randolph's infiltration and card technics ha
Autor:
H. L. Carnahan, Helen D. Hill
Publikováno v:
The Botanical Review. 27:1-162
The progress in genetics and cytogenetics of the Gramineae during the past 14 years appears to be fairly comparable in quantity and quality with that made prior to this period. Chromosome numbers are known for more than twice as many species of grass
Publikováno v:
Crop Science. 1:75-80
Autor:
Arne W. Hovin, Helen D. Hill
Publikováno v:
Crop Science. 5:257-260
Autor:
Helen D. Hill, Arne W. Hovin
Publikováno v:
Crop Science. 4:78-81
Autor:
H. L. Carnahan, Helen D. Hill
Publikováno v:
Agronomy Journal. 47:258-262
Autor:
W. M. Myers, Helen D. Hill
Publikováno v:
Agronomy Journal. 40:466-469
Autor:
Helen D. Hill, H. L. Carnahan
Publikováno v:
Botanical Gazette. 116:82-86
1. For the practical purpose of obtaining root tips likely to show metaphase cells, it may be concluded that the flourishing condition of the plant is of paramount importance. 2. The production of metaphase cells by the clone of meadow fescue showed
Autor:
Helen D. Hill, W. M. Myers
Publikováno v:
Botanical Gazette. 104:171-177
1. Chromosomal association and behavior during meiosis was determined from duplicate collections of twelve plants and single collections of eight plants from open-pollinated populations of Dactylis glomerata. 2. The average number of quadrivalents pe