Several species and strains of lactobicilli, Bacillus coagulans, and Sporolactobacillus inulinus produced detectable amounts of extracellular nuclease which hydrolyzed ribonucleic acid and deoxyribonucleic acid.

SUMMARY DNA extracted from frog virus 3 has a GC mol fraction of about 0"56. The mol. wt. of the DNA is about Ioo x I@ (97 × IO 6 by neutral sucrose gradient sedimentation; IO2 × IO 6 from renaturation kinetics). Analysis by neutral sucrose sedimentation indicated that the DNA exists as a single heteroduplex in the virus particle. Alkaline sucrose gradient sedimentation indicated that single st...

The effects of UV synchrotron radiation on deoxyribonucleic acid (DNA) cast films have been systematically investigated by vacuum ultraviolet and infrared spectrophotometry as a function of irradiation time. Cast DNA films exposed at 140 nm (8.85 eV) for different irradiations times, revealed consistent changes in their VUV spectra which indicate a decrease of thymine groups and an increase of ...

A proteinaceous substance was detected in the liver of several animal species that inhibited the multiplication of certain deoxyribonucleic acid, but not ribonucleic acid, viruses. Preliminary experiments suggested that its site of action was not extracellular. It did not inhibit virus by interfering with adsorption to cells. It was suggested that this inhibiting substance acts directly upon ce...

Coagulase-positive isolates of Staphylococcus intermedius from dogs and coagulase-positive isolates of Staphylococcus hyicus subsp. hyicus from a pig and cows were identified initially by a simplified scheme which can be readily performed in a routine diagnostic laboratory. Characters tested in the scheme included coagulase activity, colony pigment, and aerobic acid production from maltose. The...

INTRODUCTION We present a case of long-term evolution of a submandibular pleomorphic adenoma. There is little information about topographic malignant transformation patterns of pleomorphic adenomas. CASE PRESENTATION We extensively analyze a giant submandibular mixed tumor of 25-year evolution in a 57-year-old Caucasian woman. Deoxyribonucleic acid ploidy was evaluated in different superficia...

Values for the deoxyribonucleic acid and ribonucleic acid contents in a considerable number of human post-mortem tissues are given and briefly discussed.