The quantum yield for the inactivation of tobacco mosaic virus has been determined at 253.7 mmicro and found to be 4.3 x 10(-6). The possible significance of the observed one-hit process of inactivation has been discussed in terms of the kinetics and the rupture of model substances including nucleic acid. The ultraviolet light inactivation, which proceeds independent of oxygen, occurs without c...

We studied rotaxanes that consisted of a molecular axle, with a photoactive 9-Aryl-9-methoxy-acridane moiety at one end, and a tetracationic ring of cyclobis(paraquat-p-phenylene) (CBQT(4+)). The aim of the study was to deposit the axle ends onto gold nanoparticles (AuNPs). First, we introduced thioctic acid into the axle molecules. Then, rotaxanes were deposited on AuNPs by two methods: 1) Pse...

Because some antibiotics have proved active in certain parasitic infections, there appears to be good prospect that this rapidly growing and meagerly tested class of chemotherapeutic agents (there are already some 4,000 known antibiotics!) will some day provide efficient treatments for some of the parasitic diseases of livestock and poultry. Antibiotics are especially useful for combating bacte...

An ethidium bromide-resistant mutant (EB8) derived from a Marburg strain of Bacillus subtilis was found to be conditionally resistant to 10 mug of ethidium bromide per ml. Expression of resistance is complete only during vegetative growth at incubation temperatures above 30 C in complex medium or minimal medium supplemented with Casamino Acids. Strain EB8 is cross-resistant to acriflavine and p...

other. However, scores of remedies that were offered for this disease included physical therapy with short wave diathermy, artificial fever, ultaviolet irradiation, roentgen-ray therapy of spleen, non specific foreign protein shock therapy as T.A.B. vaccines intravenously, N.A.B., antimony compounds, acriflavine, mercuro? chrome, trypan blue, methyl violet etc., paraaminobenzoic acid, and the w...

The rapid detection of Listeria monocytogenes contamination in food is essential to prevent food-borne illness in humans. The aim of this study was to differentiate non-contaminated milk from milk contaminated with L. monocytogenes using enzyme substrates coupled with the analysis of volatile organic compounds (VOCs). The method is based on the activity of β-glucosidase and hippuricase enzymes ...

are reported : (1) J. B. S. came to me with lesions of eight months' duration on the dorsum of one of his hands. There was a rash like prickly heat with oedema and oozing. The weeping was very marked and tiny shallow ulcers were seen. The patient had tried acriflavine, calamine, gentian violet lotions and even x-rays but to no effect. His skin could not tolerate any hot fomentation. The only th...