Based on the complementarity of the initial coding region (downstream box [db]) of several bacterial and phage mRNAs to bases 1469 to 1483 in helix 44 of 16S rRNA (anti-downstream box [adb]), it has been proposed that db-adb base pairing enhances translation in a way that is similar to that of the Shine-Dalgarno (SD)/anti-Shine-Dalgarno (aSD) interaction. Computer modeling of helix 44 on the 30...

* These studies were supported by research grants from the National Science Foundation (G-21026) and the National Institutes of Health (H-5293). t Postdoctoral fellow (JS) and career research awardee (RSS) of the National Institutes of Health, and postdoctoral fellow (RA) of the American Cancer Society. 1 Hoagland, M., in The Nucleic Acids, ed. E. Chargaff (New York: Academic Press, 1960), vol....

A derivation of the Bohm model, and some general comments about it, are given. A modification of the model which is formally local and Lorentz-invariant is introduced, and its properties studied for a simple experiment. 1. The Bohm model as a simple realistic quantum theory. Non-relativistic quantum mechanics, as it is presented in almost all textbooks , is a theory which is either incorrect or...

Immunoprecipitation techniques have shown that characteristic Jens proteins can be found in many tissues of the chick eye. Langman & Prescott (1959), Maisel & Langman (1961o), Maisel (1962) and Maisel & Harmison (1963), among others, have demonstrated antigens cross-reacting with adult chick lens antisera in iris, pigmented retina, cornea and aqueous and vitreous humour. Maisel (1963) suggested...

Pulmonary hypertension syndrome (PHS), commonly called ascites, is a costly metabolic disease occurring in rapid-growing chickens. Research has shown that dietary sources of energy (KHAJALI and FAHIMI, 2010) and protein (IZADINIA et al., 2010) have significant effects on pulmonary hypertensive response in broiler chickens. It has been suggested that rapid-growing broilers may be in the status o...

Context. Weak lensing applied to deep optical images of clusters of galaxies provides a powerful tool to reconstruct the distribution of the gravitating mass associated to these structures. Aims. We use the shear signal extracted by an analysis of deep exposures of a region centered around the galaxy cluster ABCG209, at redshift z ∼ 0.2, to derive both a map of the projected mass distribution a...

The 351 nm photoelectron spectra of the negative ions of o-, m-, and p-benzyne (1,2-, 1,3-, and 1,4-dehydrobenzene, respectively) and their perdeuterated isotopomers have been obtained. The o-benzyne ions were generated by the reaction of benzene and benzene-d6 with O-, while the mand p-benzyne ions were prepared by the gas-phase reaction between the corresponding 3and 4-(trimethylsilyl)phenyl ...