Photosystem I preparations were obtained from wild type tobacco Nicotiana tabacum var. John William’s Broadleaf (JWB) and from the two chlorophyll-deficient mutants N tabacum Su/su and N. tabacum Su/su var. Aurea. The preparations were characterized with respect to the chlorophyll a/b ratio, their photosynthetic activity and their absorption spectroscopic properties. Peptides from these prepara...

Bacterial adhesion to surfaces is the first step in biofilm formation, which leads development of conditions that may compromise health status patients. Surface modification has been proposed reduce bacterial biomaterials. The objective this work was assess and compare Streptococcus mutans surface biomimetically-modified stainless steel using different topographies. Stainless plates were modifi...

Endopleura uchi is a typical Amazonian tree and its bark is popularly employed in the preparation of teas against myomas, arthritis, influenza, diarrhea and cancer. In this study, the antioxidant activity, cytotoxicity and antimicrobial activity of five different extracts of the bark, selected by their total tannin content, were assessed. The potential antioxidant activity of the extracts was d...

fever had been registered in the Military Hospitals between the years 1823 and 1858. In the Civil Hospital for four years prior to 1866, (including all classes of the community,) only 85 cases of paludal fever had occurred j whereas in the same hospitals during the eighteen months ending June 1867, no less than 2,576 patients were under treatment suffering from intermittent fever ; and within t...