A $ extit{sigma partitioning}$ of a graph $G$ is a partition of the vertices into sets $P_1, ldots, P_k$ such that for every two adjacent vertices $u$ and $v$ Hobby Paint there is an index $i$ such that $u$ and $v$ have different numbers of neighbors in $P_i$.The $ extit{ sigma number}$ of a graph $G$, denoted by $sigma(G)$, is the minimum number $
Abstract A refining column in the middle east that started its official production in 2020 provides its sour wastewater from all refinery plants to two sour water units (SWS1 and SWS2) to strip H2S and NH3.Sour gas from the refinery uses a lean amine solution for gas sweetening to absorb H2S in different absorbers.Rich amine with H2S is then stripp
This work demonstrates the use of baromembrane method 3 Piece RAF Sectional based on reverse osmosis (RO) process.The method is realized on mobile complex, which allows to concentrate and determine ultra-low activity of radionuclides in water cooling ponds of Russian nuclear fuel cycle enterprises.The existence level of radionuclide background crea
The hypothesis that small body size is correlated with preference for young leaves was tested in a community of leaf-chewing insect herbivores feeding on Ficus wassa in a humid tropical forest in Papua New Guinea.Feeding experiments on 48 species of herbivorous insects revealed a negative correlation between body size and a preference for feeding o
Pea seeds were swollen in solutions with different concentrations of cytokinin benzyladenine (BA).As compared with controls, a low concentration of BA (0.05 mg/l) did not affect the growth of stems and roots of twelve-day-old seedlings but concentrations of 0.20-4.00 mg/l showed an inhibiting effect; this inhibition was proportional to the concentr