1. When chick-embryo cells were treated with ultraviolet-inactivated influenza virus (Melbourne strain), interferon was produced after a lag period of about 10hr. 2. The addition of small amounts of either puromycin or p-fluorophenylalanine immediately after the virus inhibited the subsequent production of interferon. Both inhibitors primarily affected protein synthesis, and it is concluded tha...

l-2,5-Dihydrophenylalanine is extensively incorporated as a phenylalanine analogue into cell proteins. Phenylalanine-requiring Escherichia coli ATCC 9723f and sarcoma 180 grow at normal rates initially with the analogue and maximally replace 65 and 33%, respectively, of phenylalanine in the peptide residues of their cell protein without death. With the analogue alone growth of E. coli becomes n...

The effects of chloramphenicol and p-fluorophenylalanine (p-FPA) on growth, proportion of motile cells, average rate of motility, and the chemotactic response of a methionine auxotroph of Escherichia coli K-12 were studied. Kinetic studies revealed that the inhibition of chemotaxis by p-FPA can be explained by the effect on growth, proportion of motile cells, and average rate of motility rather...

An in vitro zygotic embryo germination protocol was developed for apricot (Prunus armeniaca L. “Hacıhaliloğlu”). A hundred percent of germination was obtained when isolated embryos were cultured in vitro, a result alike those reported in the literature with traditional dormancy breaking treatments. In vitro seedling development was optimal in a modified full-strength Murashige and Skoog (1962) ...

There are 34 Phlomis L. species (Labiatae) growing in Turkey. Some Phlomis species are used as tonics and stimulants in Anatolia . During our systematic phytochemical investigations of Phlomis species we have studied P. linearis Boiss. & Bal.3−6, Phlomis armeniaca Willd., Phlomis pungens Willd. var. pungens 8−10, Phlomis pungens Willd. var. hirta Velen, Phlomis bourgaei Boiss., and Phlomis long...

Development, imaginal survivorship, adult longevity and fecundity of the predatory phytoseiid mite Euseius (Amblyseius) finlandicus Oudemans reared on seven different plant pollens were determined in the laboratory. The rationale behind these experiments was to assess the nutritional value and the possible effect on development and population dynamics of the mite. Mites were kept individually o...