The packing chromatic number χρ(G) of a graph G is the smallest integer k such that the vertex set of G can be partitioned into packings with pairwise different widths. Several lower and upper bounds are obtained for the packing chromatic number of Cartesian products of graphs. It is proved that the packing chromatic number of the infinite hexagonal lattice lies between 6 and 8. Optimal lower a...

Grass is generally considered as one of the major agricultural products and covers over 90% of Irish agricultural land. While useful as an animal feedstock it can also be used for energy production. Here batch mesophilic anaerobic digestion of grass silage was studied. The methane concentration in the biogas clearly showed that grass silage has a high affinity to produce a high quality methane ...

A biofilter was used to treat air polluted with ethylbenzene. Macadamia nutshells, which are a cheap waste product in Thailand, were chosen as the packing material for the biofilter. The moisture content (6.6 w%), water holding capacity (16.8 w%), nutshell density (1.3 g ml) and organic content (78.0 w%) of the macadamia nutshell were measured. The biofilter was operated during 5 months, in whi...

Dietary meats play a crucial role in human health. The objective of this survey was to determine the fatty acid content and omega-6/omega-3 polyunsaturated fatty acids (n-6/n-3 PUFA) ratio of fresh red meat (beef and pork) from four cities (Shanghai, Nanjing, Yinchuan and Hohhot) in China. The results showed that the n-6/n-3 PUFA ratio from all the samples ranged from 6 to 23. The total n-6 PUF...

considering the importance of the impact of subsidy reform on the agricultural sector, the study aimed at understanding consequences of changes in the rates of production subsidy using general equilibrium model based on input-output table in the year 2001.the study conducted based on three scenarios containing step, down and finally removed rates of production subsidy. the effects on production...

the main objective of this study is to examine the impacts of two demand side policies, namely; expanding food industries and externally increase in households’ demand for agricultural goods ,on the growth of products in agricultural subsector. to this end, a social accounting matrix (sam) is constructed based on the latest iranian input- output table released in 2001. then, production multipli...

present study, compares iran's agricultural products competitiveness power with mena's countries during 1995-2011. for accomplishing mentioned goal, first, agricultural commodities export and import indices calculated for each one of twenty countries of mentioned region and then revealed comparative advantages index of agricultural commodities trade calculated. results showed that iran had comp...