Be my guest: The function of a system based on self-assembled Zn(II) complexes can be controlled by external chemical stimuli. The complexes are based on a C3 -symmetric ligand that forms a unique triangular triple helicate structure 1. Upon subcomponent substitution, 1 is able to transform into a triangular double helicate 2 which, unlike 1, can encapsulate guests.

In order to study effects of frustration in an itinerant electron system, we investigate ground states of the antiferromagnetic double-exchange model on a triangular lattice. In this model, pseudo-spins are coupled to electron transfer integrals in such a way that antiparallel configurations of pseudo-spins gain kinetic energies. Although the antiferromagnetic Ising model on a triangular lattic...

Abstract The slender body theory is extended to accommodate cases where a wing, in generally non-uniform motion, sideslips at sufficiently large angle make the flow separate from one of its long edges but not any part other. In those cases, an approximately triangular wake forms side rendering pressure loads on wing only asymmetrical, also dependent history wing's motion. can have wide range po...

conclusions it was concluded that snake bite cases in kashan are similar to other areas in iran from an epidemiological point of view, including; age distribution rates, gender and site of the bites. the existence of macrov ipera lebetina, a dangerous venomous snake, can cause a range of clinical effects among residents in central parts of iran, such as kashan area. patients and methods this re...

In this study, a double-negative triangular metamaterial (TMM) structure, which exhibits a resounding electric response at microwave frequency, was developed by etching two concentric triangular rings of conducting materials. A finite-difference time-domain method in conjunction with the lossy-Drude model was used in this study. Simulations were performed using the CST Microwave Studio. The spe...

background: snakebite is a serious public health problem in the world. the annual incidence of snakebites ranges from 4.5-9.1 in 100,000 population in iran. with regard to diversity of envenomation profiles in different geographical parts of iran, the aim of this study was to determine the demographical data, clinical and laboratory findings, and the outcome of the snakebite victims referred to...

Let be a simple, finite, connected, plane graph with the vertex set src=image/13427481_02.gif>, edge src=image/13427481_03.gif> and face src=image/13427481_04.gif>). Martin Baca [1] defined, connected src=image/13427481_04.gif> to src=image/13427481_05.gif> antimagic if there exists positive integers src=image/13427481_06.gif> src=image/13427481_07.gif> bijection...