Physical and chemical characteristics of stearin and olein obtained by dry fractionation of milk fat

Frakciona kristalizacija ja termomehanički postupak koji omogućuje razdvajanje triglicerida po stupnju nezasićenosti. Ovaj tehnološki postupak u industriji ulja koristi se za dobijanje raznih tipova namjenskih masti. U radu je izvršeno frakcioniranje jednog uzorka mliječne masti iz otopine tzv. direktnim postupkom. Frakciona kristalizacija rađena je u vertikalnom laboratorijskom kristalizotoru sporohodnom miješalicom (16 o/min). Rastopljena mliječna mast temperature 60 °C je kontrolirano i polagano hlađena po određenom temperaturno-vremenskom, režimu od 24, 25 i 26 °C. U toku procesa frakcioniranja iskristalizirana frakcija triglicerida s višom točkom topljenja (stearin) odvajana je od tekuće frakcije (oleina) filtracijom na vakuumu. Kristalizacija, procjena kvalitete i mogućnosti primjene dobijenih frakcija vršene su određivanjem točke kapanja, točke očvršćavanja i sadržajem čvrstih triglicerida.Fractional crystalization is known as thermo-mechanical procedure that enables separation of triglicerides according to the degree of unsaturation. This technological procedure is used in oil industry for the production of various types of special fats. This paper reviews the investigations on the application of the method of dry fractionation. Fractional crystalization has been carried out in vertical laboratory crystalizer with slow rotational mixer (16 r.p.m.). Melted milk fat, at the temperature od 60 °C has been slowly and under controlled conditions cooled according to predetermined temperature and time regimes up to 24, 25 and 26 °C. In the course of the procedure of fractionation, the obtained crystalized fraction of triglicerides with a higher melting point (stearin) has been separated from liquid phase (olein) by vacuum filtration. Characterization, quality evaluation and possibilites for application, for the obtained fractions, have been carried out by the determination of dropping point, solidification point and solid fat index

3-(3-Acetylanilino)-1-ferrocenylpropan-1-one

The title ferrocene-containing Mannich base, [Fe(C5H 5)(C16H16NO2)], crystallizes with two independent molecules (A and B) in the asymmetric unit. Molecules A and B have similar conformations. The dihedral angles between the best planes of the benzene and substituted cyclopentadienyl rings are 88.59 (9) and 84.39 (10)° in A and B, respectively. In the crystal, the independent molecules form centrosymmetric dimers via corresponding N - H⋯O hydrogen bonds. The dimers further arrange via C - H⋯π and C - H⋯O interactions. There are no significant interactions between the A and B molecules. © 2012 International Union of Crystallography

Synthesis, structural, DFT, and cytotoxicity studies of Cu^II and Ni^II complexes with 3-aminopyrazole derivatives

Template synthesis of N,N′-bis(4-acetyl-5-methylpyrazole-3-yl) formamidine (ampf) was performed starting from 4-acetyl-3-amino-5-methylpyrazole (aamp) and CH(OC2H5)3 in methanol in the presence of CuCl2, Cu(NO3)2, or Ni(NO 3)2. The ligand was isolated in coordinated form as [Cu(ampf)Cl2], [Cu(ampf)(MeOH)(NO3)2]MeOH, and [Ni(ampf)(MeOH)2(NO3)]NO3 correspondingly. The compounds were characterized by elemental analysis, Fourier-transform IR and electronic spectroscopy, thermal analysis, single-crystal X-ray diffraction, and quantum chemical (density functional theory) calculations. The density functional theory calculations provided information on the metalligand interactions in the complexes and assisted the assignment of the FT-IR spectra. The antiproliferative activity of the complexes and the ligand precursor, aamp, was tested against human myelogenous leukaemia K562, colon adenocarcinoma HT29, and cervix carcinoma HeLa. © 2010 CSIRO

Transition metal complexes with thiosemicarbazide-based ligands. Part 58. Synthesis, spectral and structural characterization of dioxovanadium(V) complexes with salicylaldehyde thiosemicarbazone

The first two complexes of dioxovanadium(V) with salicylaldehyde thiosemicarbazone (SALTSC), of the coordination formulas [VO2(SALTSC––H)]∙H2O (1) and NH4[VO2(SALTSC–2H] (2), were synthesized and characterized by elemental analysis, conductometric measurements, IR and UV–Vis spectroscopy and X-ray analysis. The complexes were obtained in the reaction of an aqueous ammoniacal solution of NH4VO3 and SALTSC. The results of the characterization showed that SALTSC was coordinated in the usual ONS tridentate mode as monoanion in complex 1 and dianion in complex 2. In both complexes, the vanadium atom is in a deformed square-pyramidal environment and is slightly shifted towards the apical oxo-ligand (» 0.52 Å)