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Let denote the class of connected plane bipartite graphs with no pendant edges. A finite face s of a graphG ∈ is said to be a forcing face ofG if the subgraph ofG obtained by deleting all vertices of s together with their incident edges has exactly one perfect matching. This is a natural generalization of the concept of forcing hexagons in a hexagonal system introduced in Che and Chen [Forcing ...

The conventional linear integral isoconversional methods may lead to important errors in the determination of the activation energy when the significant variation of the activation energy with the conversion degree occurs. Vyazovkin proposed an advanced nonlinear isoconversional method, which allows the activation energy to be accurately determined [Vyazovkin, J Comput Chem 2001, 22, 178]. Howe...

Current evidence indicates that the trimming of mannosy1 residues from intermediates in the biosynthesis of the N-linked oligosaccharides of glycoproteins occurs in the Golgi complex. We now present evidence that mannosidase 11 (Tulsiani, D. R. P., Opheim, D. J., and Touster, 0. (1977) J. Bwl Chem 252,3227-3233) is the Golgi enzyme that converts GlcNAcMans species to GlcNAcMans species in compl...

Introduction Conclusions References Tables Figures

Several relations between the coefficients of the permanental and characteristic polynomials were given by Gutman and Cash [ MATCH Commun. Math. Comput. Chem. 45 (2002) 55-70]. In this paper, some more and general connections between those coefficients are presented.

7Mulliken, R. S., J. Am. Chem. Soc., 74, 811 (1952). 8Pullman, B., and A. Pullman, Quantum Biochemistry (New York: Interscience Publishers, 1963). 9 Streitweiser, Jr., A., Molecular Orbital Theory for Organic Chemists (New York: John Wiley and Sons, 1962). lo Fukui, K., A. Imamura, T. Yonezawa, and C. Nagata, Bull. Chem. Soc. Japan, 34, 1076 (1961). 11Fukui, K., T. Yonezawa, and C. Nagata, J. C...