The crystal structure of Pigment Red 254 [P.R. 254, C18H10Cl2N2O2; systematic name: 3,6-bis-(4-chloro-phen-yl)-2,5-di-hydro-pyrrolo-[3,4-c]pyrrole-1,4-dione] was solved from laboratory X-ray powder diffraction data using the simulated annealing method followed by Rietveld refinement because the very low solubility of the pigment in all solvents impedes the growth of single crystals suitable for...

The mol-ecule of the title Schiff base compound, C16H16N4O5S·C3H7NO, displays a trans conformation with respect to the C=N double bond. The C-N and N-N bonds are relatively short compared to their normal bond lengths, indicating some degree of delocalization in the mol-ecule. The mol-ecule is bent at the S atom, with an S-N-C-C torsion angle of 164.48 (11)°. The dihedral angle between the two a...

Two phase flow in a horizontal tube has widespread applications, particularly in the condensers of refrigeration and air conditioning systems. Pressure drop prediction is especially important for condensers because the local condensing temperature is a function of local pressure, affecting the mean temperature difference in the heat exchanger. In the present analysis, two phase flow is treated ...

This file provide the detailed steps for obtaining the bounds on R1, R2 via the obtained results on (R1c, R1p, R2c, R2p). The rate pair (R1c, R1p, R2c, R2p) is achievable if it satisfies following inequalities. R1c ≤ rank(U 1 H11V21) (1) R1p ≤ m1 − r21 (2) R2c ≤ r12 (3) R1c +R1p ≤ r11 (4) R1c +R2c ≤ r12 + rank(U 10H11V21) (5) R1p +R2c ≤ r12 + rank(U 10H11V20) (6) R1c +R1p +R2c ≤ n1 (7) R2c ≤ ra...

In the title mol-ecular salt, C6H10N3O+·C7H5O3-, the cation is protonated at the N atom lying between the amine and methyl substituents and the dihedral angle between the carboxyl group and its attached ring in the anion is 4.0 (2)°. The anion features an intra-molecular O-H⋯O hydrogen bond, which closes an S(6) ring. The cation and anion are linked by two N-H⋯O hydrogen bonds [R22(8) motif] to...

Let Pf (N ) be the set of finite nonempty subsets of N and for F,G ∈ Pf (N ) write F < G when maxF < minG. Let X = {(F,G) : F,G ∈ Pf (N ) and F < G}. A triangle in X is a set of the form {(F ∪ H,G), (F,G), (F,H ∪ G)} where F < H < G. Motivated by a question of Erdős, Nešetŕıl, and Rödl regarding three term arithmetic progressions, we show that any finite subset Y of X contains a relatively larg...

In the title complex, [Zn(C8H4NO2)2(C10H14N2O)2(H2O)2], the ZnII cation, located on an inversion centre, is coordinated by two water mol-ecules, two 4-cyano-benzoate (CB) anions and two di-ethyl-nicotinamide (DENA) ligands in a distorted N2O4 octa-hedral geometry. In the mol-ecule, the dihedral angle between the planar carboxyl-ate group and the adjacent benzene ring is 9.50 (14)°, while the be...

The synthesis and crystal structure of a monoclinic (P21/c) polymorph of the title compound, C6H10S2N8, are reported. The mol-ecule has pseudo-twofold rotational symmetry, with the tetra-zole rings being inclined to one another by 5.50 (6)°. In the crystal, mol-ecules are linked by C-H⋯N hydrogen bonds, forming chains propagating along [101] and enclosing R22(20) ring motifs. The chains are lin...

The given paper is aimed at constructing the general circuit of heat processes in a semihermetic reciprocating refrigerant compressor as a basis of application of new ecology-friendly refrigerants as well as optimizing design parameters of compressor. While performing this work the following problems were solved: 1. Experimental research of heat processes in a semihermetic refrigerant reciproca...

The cellular fatty acid composition of Mycobacterium vaccae JOB5 and Mycobacterium convolutum R22 was examined after growth on n-alkanes and compared with the fatty acids of the organisms after growth on 1-chlorohexadecane and 1-chlorooctadecane. Growth on n-alkanes resulted in normal fatty acid profiles. Mass spectral analyses indicated that, after growth on the terminally chlorinated n-alkane...