The photoreaction which takes place between benz [a] pyrene and DNA by irradiation at 365 nm leads to a covalent combination. To ascertain the reactive sites of DNA, a sample of the macro­ molecule has been precipitated after irradiation in the presence of benz [a] pyrene and hydrolized; among the products of hydrolysis four different fluorescent substances have been isolated, one of which was ...

Probiotic bacteria are defi ned by FAO/WHO as “Live microorganisms which when administered in adequate amount confer a health benefi t” (Fuller, 1986; Reid et al., 2005). Probiotics are characterized by numerous antagonistic effects against the Gram-positive and Gram-negative pathogens. In addition, probiotics are also believed to reduce the risk of disorders from bacteria in the gastrointestin...

zogenes are differentiated cells capable of the biosynthesis of secondary metabolites. Hairy roots also have a high rate of proliferation. They are therefore expected to become widely used culture systems for the production of useful secondary metabolites and for studies on the production of biologically active compounds and transformation of organic substrates. We reported the production of a ...

Computing based on biochemical processes is a newest rapidly developing field of unconventional information and signal processing. In this paper we present results of our research in the field of biochemical computing and summarize the obtained numerical and experimental data for implementations of the standard two-input OR and AND gates with double-sigmoid shape of the output signal. This form...

365 Dawson, P.J., 1988. Labour on the family farm: a theory under uncertainty. Agric. Econ., 1:365-380. This paper develops a theory of the family farm in conditions of uncertainty where attention is focussed on the labour-input decisions. Specifically, the farm family is faced with two labour decisions, namely with respect to hired labour and to family labour. The framework for analysis is exp...

respiratory syncytial virus (rsv) is the major cause of lower respiratory tract infections in infants,and also an important factor for hospitalization during the winter months. to determine the prevalence and importance of rsv as a cause of acute lower respiratory tract infection, we carried out a prospective study during 5 months period from november to march 1998 in 6 pediatric hospitals. a n...

background: interleukin-6 (il-6) is one of the inflammatory mediators characterized by elevated levels in ischemic stroke (is) patients. the present study set out to assess the role of il-6, as a marker for inflammation, in the severity and prognosis of acute is. methods: in a cross-sectional descriptive study, 45 patients with acute is were selected. patients with their first day of stroke wer...

It’s easiest to begin by calculating the probability p(N) that N people in a room all have different birthdays. The probability of at least two people having the same birthday is then 1 − p(N). Assuming that birthdays are evenly distributed throughout the year, the probability that, in some arbitrary order, the second person in the room does not have the same birthday as the first is given by 3...