Hierarchical heterogeneous modeling is an approach for modeling heterogeneous embedded systems. It is a solution to manage the heterogeneity problem of the embedded systems and it helps to reduce the complexity of embedded systems modeling. However, the borders between hierarchical levels are opaque. Domain polymorph components, which is another approach to heterogeneity, can automatically adap...

A new ortho-rhom-bic polymorph of terephthalaldehyde, C(8)H(6)O(2), with a melting point of 372 K, has been obtained by recrystallization from ethanol. At room temperature, the crystals transform into the well known monoclinic form, with a melting point of 389 K. The crystal structure of the monoclinic form involves C-H⋯O hydrogen bonds, but no such bonds are observed in the orthorhombic form. ...

The asymmetric unit in the title compound, C(5)H(5)NO, comprises two independent but virtually identical mol-ecules of 2-pyridone, and represents a monoclinic polymorph of the previously reported ortho-rhom-bic (P2(1)2(1)2(1)) form [Penfold (1953 ▶). Acta Cryst.6, 591-600; Ohms et al. (1984 ▶). Z. Kristallogr.169, 185-200; Yang & Craven (1998 ▶). Acta Cryst. B54, 912-920]. The independent mol-e...

Synthesis, polymorph investigation, crystallographic study, and fabrication of OFETs in solution-processed thin films C7-BTBT-C7 .

THE TITLE COMPOUND (SYSTEMATIC NAME 2-mercaptoethan-aminium chloride), C(2)H(8)NS(+)·Cl(-), the hydro-chloride salt of cysteamine, in contrast to the previously reported triclinic polymorph [Kim et al. (2002 ▶). Polyhedron, 21, 225-228], crystallized in the monoclinic crystal system. In the crystal, the cysteaminium cations are linked to the chloride anions via one S-H⋯Cl and three N-H⋯Cl hydro...

The title compound, C(2)H(7)AsO(2) or [As(CH(3))(2)O(OH)], is an organic derivative of arsinic acid, and is also known by its trivial name cacodylic acid. In contrast to the first polymorph (triclinic, space group P[Formula: see text], Z = 2), the current study revealed monoclinic symmetry (space group C2/c, Z = 8) for the second polymorph. The configuration of the tetra-hedral mol-ecule shows ...

The effect of recrystallization temperature on the lamellar structure of RSIII samples was studied using XRD and SAXS. The polymorph type could be manipulated in a controlled manner, independently of the plant source. In RSIII from corn starch and from high-amylose corn starch, retrogradation at a low temperature led to the formation of polymorph B with lamellas arranged in long-range periodici...

A kinetically favoured crystal, with many molecules in the asymmetric unit, may be a fossil relic of the crystal nucleus of a more stable polymorph.