Benzene-1,3,5-tricarb-oxy-lic acid-1,10-bis-(1,2,4-triazol-1-yl)deca-ne-water (1/1/2).

In the title 1:1:2 association, C(14)H(24)N(6)·C(9)H(6)O(6)·2H(2)O, the alkyl chain in the 1,10-bis-(1,2,4-triazol-1-yl)decane mol-ecule adopts an extended conformation and the dihedral angle between the aromatic rings is 10.28 (13)°. The benzene-1,3,5-tricarb-oxy-lic acid mol-ecule is close to being planar (r.

Bis[μ-2,2'-dimethyl-1,1'-(3-oxapentane-1,5-di-yl)di-1H-benzimidazole-κN:N]bis-[bis-(4-meth-oxy-benzoato)-κO;κO,O'-cobalt(II)].

The complete mol-ecule of the title complex, [Co(2)(C(8)H(7)O(3))(4)(C(20)H(22)N(4)O)(2)], is a dimer of the paddle-wheel-type generated by crystallographic inversion symmetry. The Co(II) ion is penta-coordinated by three O atoms from two 4-meth-oxy-benzoate anions (one bidentate and one monodentate) and two N atoms from two 2,2'-bis-(2-methyl-1H-benzimidazole)-ether ligands. This results in a very distorted trigonal-bipyramidal geometry for the metal ion, with both N atoms in equatorial sites.

An S-curve-based approach of identifying biological sequences.

The main idea of S-curve diagram is to assign different angle values (from 0 degrees to 180 degrees ) to different nucleotide acid residues or to different protein amino acids, and then according to cos alpha(j) and sin alpha(j), the values are accumulated to construct an S-curve diagram, which is in strict one-to-one correspondence with the biological sequence. In addition, the S-curve diagram proves to be without the degeneracy phenomenon, so that both the degeneracy problem represented by diagrams and the problem of visualization for biological sequence data are solved. Meanwhile, a new approach to differentiate the similarity of biological sequences--the degree of similarity--is put forward on the basis of the S-curve diagram.