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Filtering by: Committee Member Young, Roy A. Date 1964

Contracting nucleolar vacuoles in somatic tobacco cells growing in microcultures

Creator:

Johnson, John Morris

Abstract:

Contracting nucleolar vacuoles are a general and consistent feature of somatic tobacco cells growing in microcultures. Nucleolar vacuoles were studied in cells from callus tissues of two single-cell clones, H-196 and H-239, of hybrid tobacco (Nicotiana tabacum X N. glutinosa). Vacuoles periodically contracted either completely or incompletely, apparently releasing a...

Resource Type:

Dissertation
The fruits and seeds of the Rancho La Brea Pleistocene deposits

Creator:

Templeton, Bonnie Carolyn

Abstract:

More than 4,000 specimens of fruits and seeds were extracted from the matrix removed from inside the skulls of sabre-tooth cats excavated from various pits in the Rancho La Brea deposits. Of this number, spproximately 1,445 specimens are involved in this study. Many comparisons with modern fruits and seeds made...

Resource Type:

Dissertation