The binding number of a graph G, bind(G), is defined; some examples of its calculation are given, and some upper bounds for it are proved. It is then proved that, if bind(G) > c, then G contains at least 1 G 1 c/(c + 1) disjoint edges if 0 < c < 3, at least ( G I (3c 2)/3c 2(c 1)/c disjoint edges if 1 < c < $, a Hamiltonian circuit if c > $, and a circuit of length at least 3(1 G / l)(c 1)/c if...

a special class of cubic graphs are the cycle permutation graphs. a cycle permutation graph pn(α) is defined by taking two vertex-disjoint cycles on n vertices and adding a matching between the vertices of the two cycles.in this paper we determine a good upper bound for tenacity of cycle permutation graphs.

Deoxyribonucleic acid (DNA) is an important molecular target for anti-cancer agents due to its involvement in gene expression and protein synthesis which are fundamental steps in cell division and growth. A number of antineoplastic agents interfere with DNA and hence disturb the cell cycle. Compounds including planar aromatic rings are privileged scaffolds in binding to the DNA. This characteri...

Apotransferrin (apo Tf)  in 0.1 M N-(2hydroxyethyl)piperazine-N2-ethanesulfanic acid at 25 ˚C  and pH 7.4 has been titrated with acidic solution of Tb3+. The binding of Tb3+ at  the two specific metal-binding sites of transferrin was followed from the changes in the difference UV spectra at 245 nm. The molar absorptivity per binding site for Tb3+...

Looking back in time, what is really amazing is the diversity of fields, where intuitions about fuzziness were expressed and more or less formalized, and the number of scientists who participated to the emergence of the fuzzy set concept. Also it is surprising to see how long it took before such a simple, although powerful, idea of graded membership, could be cast into a proper, widely accepted...

Structural parameters of raw and pre-treated viscose, modal and lyocell fibres were determined using X-ray diffraction, and compared with data obtained from iodine adsorption and tenacity measurements. A good correlation was found between iodine adsorption and structural changes. These structural parameters are correlated with surface thermodynamic parameters obtained by surface tension experim...