5-Tripropargylamine-2'-deoxyuridine (1 a) containing two terminal triple bonds was synthesized by a Pd-assisted Sonogashira cross-coupling reaction and was subsequently converted into the corresponding phosphoramidite building block (9) and employed in solid-phase oligonucleotide synthesis. T(m) experiments demonstrate that the presence of covalently attached branched tripropargylamine residues...

An algorithm was derived to relate the amino acid sequence of a collagen triple helix to its thermal stability. This calculation is based on the triple helical stabilization propensities of individual residues and their intermolecular and intramolecular interactions, as quantitated by melting temperature values of host-guest peptides. Experimental melting temperature values of a number of tripl...

Structural alignment is useful in identifying members of ncRNAs. Existing tools are all based on the secondary structures of the molecules. There is evidence showing that tertiary interactions (the interaction between a single-stranded nucleotide and a base-pair) in triple helix structures are critical in some functions of ncRNAs. In this article, we address the problem of structural alignment ...

We study properties of arithmetic progressions consisting of three squares; in particular, how one arithmetic progression generates infinitely many others, by means of explicit formulas as well as a matrix method. This suggests an equivalence relation could be defined on the arithmetic progressions, which lead to interesting problems for further study. The purpose of this paper is to investigat...

As a generalization of the triple I method, the universal triple Imethod is investigated from the viewpoints of both fuzzy reasoningand fuzzy controller. The universal triple I principle is putforward, which improves the previous triple I principle. Then,unified form of universal triple I method is established based onthe (0,1)-implication or R-implication. Moreover, the reversibilityproperty o...

We represent the elements of K 1 of an exact category by means of two-and three-edge loops in the triple G-construction. The corresponding algebraic data are double short exact sequences and non-commutative 33-diagrams of short exact sequences. We state conjectural relations for the elements of K 1 in terms of 3 3-diagrams. 1. Review of the G-and the triple G-construction In GG] Gillet and Gray...

Transient discharge of liquid cryogens from partially filled tanks under micro-gravity is considered. The discharge is made to a low pressure site through a straight tube. The ultimate objective of the study is to predict the transient mass flow rate m(t ) . In addition to m(t), the pressure history in the tank pt(t) is of interest, since the pressure falls below the triple point toward the end...

The smallest triple ring tubular silicon cluster Mn2@Si15 is reported for the first time. Theoretical structural identification shows that the Mn2@Si15 tubular structure whose triple ring is composed by three five-membered Si rings in anti-prism motif, is stable in high symmetry (D5h) and singlet ground state ((1)A1'). The dimer Mn2 is placed inside the tubular along the C5 axis, and the Mn dop...