Dissimilatory nitrite reductase was isolated from extracts of Alcaligenes xylosoxidans subsp. xylosoxidans (N.C.I.M.B. 11015), after activation of crude extracts by the addition of copper(II) sulphate. The enzyme was purified by a combination of (NH4)2SO4 fractionation and cationic-exchange chromatography to 93% homogeneity as judged by SDS/PAGE. SDS/PAGE and spray m.s. showed that the enzyme h...

We study computing with indecisive point sets. Such points have spatial uncertainty where the true location is one of a finite number of possible locations. This data arises from probing distributions a few times or when the location is one of a few locations from a known database. In particular, we study computing distributions of geometric functions such as the radius of the smallest enclosin...

We prove that there exists a set S of n points in the plane such that every n-vertex planar graph G admits a planar drawing in which every vertex of G is placed on a distinct point of S and every edge of G is drawn as a circular arc. Submitted: October 2013 Reviewed: February 2014 Revised: March 2014 Accepted: April 2014 Final: May 2014 Published: May 2014 Article type: Regular paper Communicat...

BACKGROUND We examine the uptake of HIV Testing and Counselling (HTC) and linkage into care over one year of providing HTC through community and health facility testing modalities among people living in Kibera informal urban settlement in Nairobi Kenya. METHODS We analyzed program data on health facility-based HIV testing and counselling and community- based testing and counselling approaches...

An analysis of the quantitative and qualitative composition breeding farms (breeding plants reproducers) for cattle Ukrainian black-spotted dairy (UBSD) breed, located in western region Ukraine, was conducted. It established that as January 1, 2021, there were 156 UBSD breed including 75 (40.1 %) 81 (51.9 breeders. In regions is bred 61 farms, which 39.1 % all country. There are 20 (32.8 41 bre...

Dark-matter halos are the scaffolding around which galaxies and clusters are built. They form when the gravitational instability of primordial density fluctuations causes regions which are denser than average to slow their cosmic expansion, recollapse, and virialize. Objects as different in size and mass as dwarf spheroidal galaxies and galaxy clusters are predicted by the CDM model to have hal...