background: the purpose of this comparative study was to detect superoxide dismutase (sod) activities in fasciola hepatica, f. gigantica parasites, infected and healthy liver tissues in order to determine of species effects and liver infection on sods activity level. methods: fasciola spp. parasites and sheep liver tissues (healthy and infected liver tissues), 10 samples for each, were collecte...

We consider the problem of random sampling for band-limited functions. When can a band-limited function f be recovered from randomly chosen samples f(xj), j ∈ N? We estimate the probability that a sampling inequality of the form A‖f‖ 2 ≤ ∑ j∈N |f(xj)| ≤ B‖f‖2 hold uniformly all functions f ∈ L(R) with supp f̂ ⊆ [−1/2, 1/2] or some subset of band-limited functions. In contrast to discrete models,...

Crystals of KCI and NaCl, coloured additively and quenched from high temperature to liquid-nitrogen temperature, show the F-absorption band and when irradiated in this band an emission in the infrared. If kept for a short time at room temperature a new absorption band (M-band) develops and irradiation in this band gives rise to a new emission band. If an M-absorption band is present, this new e...