Effects of lidocaine and epinephrine on myocardial preservation following cardiopulmonary bypass in the dog

For confirmation of the difference in the infectivity of hepatitis B surface antigen (HBS Ag)-positive serum according to differences in the e antigen system, four chimpanzees were inoculated with serum positive for hepatitis B e antigen (HBe Ag), and three chimpanzees were inoculated with serum positive for antibody to HBe Ag (anti-HBe). Since the infectivity titrations are not yet completed, the end infectivity titer of each serum is not known. All four chimpanzees given injections of 10(-1), 10(-4), or 10(-8) dilutions of HBe Ag-positive serum developed hepatitis B virus infection, whereas the one chimpanzee injected with undiluted anti-HBe-positive serum became infected, and other chimpanzees injected with diluted anti-HBe-positive sera did not. As judged from the length of the incubation period before appearance of HBS Ag in blood, there seemed to be a remarkable difference in infectivity between the HBe Ag-positive serum and the anti-HBe-positive serum; the former serum was 10(8) times more infectious than the latter.     

Effects of centrally administered insulin on urine output and sodium excretion in dogs

Ribosomal RNA (rRNA) synthesis, the initiation of which is an early major event during the transformation of iris into lens in the newt, was characterized in the TVI cell-line derived from the eastern North-American newt Notophthalmus viridescens. Employing the technique of polyacrylamide gel electrophoresis, molecular-weight measurements were made on newt rRNAs using Xenopus laevis and E. coli rRNAs as standards. The molecular weights of N. viridescens 28S and 18S rRNA were found to be 1.4 X 10(6) and 0.7 X 10(6) respectively. The precursor to these RNAs had a molecular weight of 3.1 X 10(6). Three probable intermediates in the processing of precursor to mature rRNA were also identified. On the basis of the molecular weights of all species of RNA identified, a processing pathway, similar to that of Xenopus, has been suggested. Some unusual features in the kinetics of precursor rRNA labelling and processing suggest the possibility that newt-cell rRNA synthesis may be controlled by the availability of essential amino acids in a manner similar to that observed in mammalian cells. A possible relationship between the availability of essential amino acids, the initiation of rRNA synthesis in the newt iris, and the control of lens regeneration is discussed.     

Clinical and hematological manifestations of infectious mononucleosis. Personal cases

An account of the incidence and features of fever, angina, adenopathy and splenomegaly in infectious mononucleosis is followed by an explanation of the importance of palpebral oedema, nasal obstruction, and exanthema and enanthema, the characteristics of which may prove of diagnostic assistance. Attention is drawn to the presence of maculopapular and itching exanthema, particularly after semi-synthetic penicillins. An assessment is also made of liver, myocardial and renal changes, since it is felt that involvement of these organs is an integral part of the clinical picture.