Now showing items 11-20 of 31
Immunocytochemical analysis of cells in the pars tuberalis of the rat hypophysis with antisera to hormones of the pars distalis
(Springer-Verlag, 1975-03)
The objective was to acquire evidence regarding the secretory capacity of cells in the pars tuberalis of the rat pituitary by the application of immunocytochemical staining. For this purpose the conjugated antibody and ...
Ecological specialization of Hawaiian Drosophila
(Springer-Verlag, 1975-03)
The ecological overlap of three species of Hawaiian Drosophila: D. mimica D. kambysellisi , and D. imparisetae , has been investigated by analysis of the community matrix. The basic model is a Lotka-Volterra formulation, ...
Insulin induction of tyrosine aminotransferase in synchronized hepatoma cells
(Elsevier, 1975-04-21)
Addition of insulin to unsynchronized rat hepatoma cells, previously incubated with dexamethasone, promotes a rapid increase in tyrosine aminotransferase activity. Mitotic cells in the presence or absence of colcemid are ...
Temperature dependent alteration in bacterial protein composition
(Elsevier, 1975-02-03)
When different strains of or are grown at 30[deg] or at 42[deg] and their proteins are compared using SDS-polyacrylamide gel electrophoresis, differences are observed in the protein composition of the cells. In particular, ...
Ultrastructural study of the neural fat-body system in the cockroach Periplaneta americana
(Springer-Verlag, 1975-06)
The neural fat-body system of the ventral nerve cord in the cockroach Periplaneta americana was studied with the light and electron microscopes. This adipose tissue surrounds the connectives and extends over the ganglia. ...
Evidence for an activating factor formed during prostaglandin biosynthesis
(Elsevier, 1975-07-22)
SummaryThe oxygenation of 5,8,11,14-eicosatetraenoic acid by acetone powder preparations of sheep vesicular glands proceeded with a lag or accelerative phase when inhibitory concentrations of NaCN were present. This ...
Discrete demographic models with density-dependent vital rates
(Springer-Verlag, 1975-09)
The standard Leslie model of population growth in an age structured population is modified so as to incorporate density-dependent feedback control on each parameter of the standard projection matrix. Under fairly general ...
Isolation of mutants of Escherichia coli lacking NAD- and NADP-linked malic enzyme activities
(Elsevier, 1975-07-22)
SummaryWhen Escherichia coli utilizes C4-dicarboxylic acids as sole sources of carbon and energy for growth, phosphoenolpyruvate is synthesized by means of phosphoenolpyruvate carboxykinase or by sequential action of malic ...
Zoosporic fungi from Tunisia, and the Seychelles Islands (Indian Ocean)
(Springer-Verlag, 1975-01)
Twenty-two zoosporic fungi were recovered from soil samples collected in Tunisia and in the Seychelles Islands in the Indian Ocean. One, Phlyctochytrium chandlerii is described as new. Most of the others are referred, ...