SUMMARY A study of the relationships between structure of 2-phenylbenzothiazoles and related compounds and their ca pacity to induce increased benzpyrene hydroxylase activity in the liver and lung of the rat has been carried out. Thirty-three compounds have been studied. It has been found that intro duction of an appropriate halogen into the 4'-phenyl position approximately doubles inducing act...

In most developing countries, agriculture is the driving force for broad-based economic growth and low agricultural productivity is a major cause of poverty, food insecurity, and malnutrition. However, food production per unit of land is limited by many factors, includ‐ ing fertilizer, water, genetic potential of the crop and the organisms that feed on or compete with food plants. Despite the p...

We investigate an integration of the rst order method of proof by consistency PBC also known as term rewriting induction into theorem proving in higher order speci cations PBC may be seen as well founded in duction over an ordering which contains the rewrite relation and in this paper we extend this method to the higher order rewrite relation due to Nipkow This yields a proof procedure which ha...

It is a well known phenomenon that in plants both development and metabolism are highly dependent on external factors, in particular on light. Biosynthesis of various compounds starts only after illumination; such a regulation has been reported also for carotenoids in different groups of plants. The main problem in the photoregulation of carotenoid biosynthesis is — like in the photoregulations...

Propionibacteria have been reported as being oxygen sensitive bacteria. Nevertheless, in this work, we intend to show that Propionibacterium shermanii CDB 10014 is able to grow even at high volumetric oxygen transfer coefficients (KLa). Similar final cell concentrations were achieved in experiments at different KLa values, with increasing cell yield from 0.08 g/g cells in anaerobic con­ ditions...

FUKADA , Y. and SAITO, H. Phasic and Tonic Cells in the Cat's Lateral Geniculate Nucleus. Tohoku J. exp. Med., 1972, 106 (2),209-210 Relay neurons in the cat's lateral geniculate nucleus have either on-center or off-center receptive field. They are further classified into Type-I (phasic) and Type-‡U (tonic). Type-I cells are activated by faster conducting opfic tract fibers and send the visual ...

is zero during this interval. Clearly in most applications, this is not the case. Hence, a class of model In this paper we consider the problem of model rereduction techniques has emerged based on viewing duction for a nonlinear plant under the in°uence of a the plant as part of a larger closed-loop system. The control system. We relate this problem to the notion usual assumption is that the sy...

As a way to emphasize several distinct features of the mul-tiresolution methods based on wavelets, we describe connections between the multiresolution LU decomposition, multigrid and multiresolution re-duction/homogenization for self-adjoint, strictly elliptic operators. We point out that the multiresolution LU decomposition resembles a direct multigrid method (without W-cycles) and that the al...

Mitochondria are organelle, which is found in most eukaryotic cells, and play an im‐ portant roll in production of many biosynthetic intermediates as well as energy trans‐ duction. Recently, it has been reported that mitochondria contribute to cellular stress responses such as apoptosis and autophagy. These functions of mitochondria are known to be essential for survival and maintenance of home...

potent carcinogen capable of producing pulmonary tumors in 100 per cent of susceptible animals after a single injection (14, 19). Interest in urethan in our laboratory followed reports of its effects on bone marrow (18), and experimental evidence of its capacity to provide increased radioresistance in mice to x-radiation has been published (6). In the course of these and other experiments the q...