Manufacturing process and performance analysis of a non-frost refrigeration system are presented in this paper. Main objectives research were to suggest better refrigerant as well propose technique for further reduction the power consumption system. Performance was evaluated Tetra-fluoro-ethane Isobutene refrigerant. From experiment, it is found that, coefficient with than Tetra-fluoro-ethane. ...

A series of novel tetra-meso-thien-2-yl porphyrins were synthesised, and the effect variation in thienyl group on photophysical properties studied. Ground excited state UV–vis absorption, steady-state time-resolved emission, resonance Raman spectroscopy, cyclic voltammetry, used to establish extent electronic communication between central Zn(II) porphyrin ring various meso-substituent groups. T...

Prasugrel {systematic name: 5-[(2-cyclo-propyl-carbon-yl)(2-fluoro-phen-yl)meth-yl]-4,5,6,7-tetra-hydro-thieno[3,2-c]pyridin-2-yl acetate}, C(20)H(20)FNO(3)S, is a new third-generation thienopyridine which was recently approved for clinical use as a more potent blocker of the platelet P2Y(12) receptor than clopidogrel, which was previously used for this purpose. The mol-ecule features a tetra-h...

In disaster management scenarios with seriously damaged, not existing, or saturated communication infrastructures satellite communications can be an ideal means to provide connectivity with unaffected remote terrestrial trunked radio (TETRA) core networks. However, the propagation delay imposed by the satellite link affects the signalling protocols. This paper discusses the suitability of using...

In the title compound, [Ni(C(8)H(4)O(4))(C(36)H(44)N(4)O(4))](n), the Ni(II) atom is coordinated in a distorted octa-hedral geometry by the four N atoms of the 1,12,15,26-tetra-aza-5,8,19,22-tetra-oxa-3,4:9,10:17,18:23,24-tetra-benzocyclo-octa-cosane ligand and two O atoms from the terephthalate dianions. The Ni(II) atoms, which lie on inversion centres, are linked via terephthalate ligands to ...

The title compound, C(23)H(22)O(8), is a binary benzoyl ester whose nucleus consists of a fused system made up of a methyl-enedi-oxy ring and two tetra-hydro-furan rings. One of the benzoyl ester groups is attached at the junction of the two tetra-hydro-furan rings. The other is attached to the outer tetra-furan ring. Both the benzoyl ester groups are in an axial conformation with respect to th...

The asymmetric unit of the title compound, C(17)H(13)N(4) (+)·BF(4) (-), contains one half of the benzimidazolium cation and one half of the tetra-fluoridoborate anion, with crystallographic mirror planes bis-ecting the mol-ecules. One F atom of the tetra-fluoridoborate is equally disordered about a crystallographic mirror plane. In the crystal, C-H⋯F inter-actions link the cations and anions i...

The title compound, C20H28O3, known as 'trichodermaerin' [systematic name: (4E)-4,9,15,16,16-penta-methyl-6-oxa-tetra-cyclo-[10.3.1.0(1,10).0(5,9)]hexa-dec-4-ene-7,13-dione], is a diterpene lactone which was isolated from Trichoderma asperellum. The structure has a tetra-cycic 6-5-7-5 ring system, with the cyclo-hexa-none ring adopting a twisted half-chair conformation and the cyclo-pentane rin...

In the title mol-ecule, C(25)H(19)N(3)O(3)S(3), the tetra-hydro-pyridine ring adopts a half-chair conformation. The dihedral angle between the least-squares plane through the tetra-hydro-pyridine ring and two thio-phene and two benzene rings are 6.25 (9), 89.49 (9), 76.43 (9) and 84.93 (8)°, respectively, while the dihedral angle between the 1,3,4-oxadiazole and tetra-hydro-pyridine rings is 81...