Structural and optical properties of the p alkylated 2,6 bis benzimidazol phenoles obtained from o phenylenediamine and their sensitive behavior towards zinc II ions

Two compounds, 2 hydroxy 5 methylisophthalaldehyde L1 and 2 hydroxy 5 tert butyl 1,3 benzenedicarboxaldehyde L2 , were obtained in the reaction between o phenylenediamine and aldehydes. The X ray crystal structure determination and DFT calculations aimed at the confirmation of the geometry of L1 and L2 in a solution and in the solid state were performed. The intermolecular interactions in the crystal structure of L1 0.5 CH3COOC2H5, L2 MeOH and L2 0.25 n hexane were analyzed using the 3D Hirshfeld surfaces and related 2D fingerprint plots. The x ray and 3D Hirschfeld analyses show the importance of the presence of the solvent in the crystal lattice. In L2 0.25 n hexane, the solvent is only weakly bound, and only a robust network of Nsingle bondH N and Csingle bondH N hydrogen bonds that stabilise channels was noted. On the other hand, in the L2 MeOH, methanol forms a robust network of hydrogen bonds. The luminescence of L1 and L2 in various solvents and in the solid state was studied. In the solid state, emission was registered at 520 nm and 506 nm for L1 and L2, respectively. DFT calculations of the fluorescence spectra indicate green luminescence of the keto form of the compounds. Thin layers of the obtained compounds were deposited on Si 1 1 1 by the spin coating method and examined with scanning electron microscopy SEM EDS , atomic force microscopy AFM and fluorescence spectroscopy. The fluorescence sensing abilities of the compounds towards Zn2 ions were evaluated. The experimental results showed that L1 and L2 could sensitively and efficiently detect Zn2 ions increase or decrease in the emission band at 443 nm for L1 or 434 nm for L2 amp; 955;ex 290 was observe

Potato-molasses distillers residue for young beef cattle

Проводились исследования по использованию картофельно-мелассовой барды после дистилляции сусла изготовленного из картофеля с прибавкой 30% мелассы з соответствии с его количеством в кормлении откормочных бычков. Основной (контрольный) рацион был составлен из сушенного ячменя собранного в стадии полной спелости, травяной муки, ржаной дерти, сухого свекловичного жома и ячменной соломы. В рационах опытных групп вместо ржаной дерти применяли разные количества картофельно-мелассовой барды. К барде входящей в состав одной из опытных диет прибавляли также аммонийные соли NH₄Cl и (NH₄)₂SO₄ с целью осаждения части калия. Потребление корма и общего белка на 1 кг привеса во всех группах отвечало нормам кормления. Наилучиие результаты были получены в группе, в рационе которой было по 25 - 35 кг барды на голову в сутки (в зависимости от веса опытных животных) с прибавкой аммонийных солей.The potato - molasses distillers’ residue was used as a feed for young beef cattle in the present experiment. The distillers’ residue was obtained after removal of alcohol from mash made from potatoes with the addition of 30% of beet molasses (by weight). The basal ration (for control group) consisted of dehydrated barley (harvested in full ripeness stage), herbage meal, ground rye, dried sugar beet pulp and barley straw. The experimental groups were given different amounts of potato - molasses distillers’ residue instead of part of ground rye. One of the groups was fed with the residue supplemented with ammonium salts - NH₄Cl and (NH₄)₂SO₄, to precipitate a part of potassium. In all the groups feed and crude protein consumptions per 1 kg weight gain were in agreement with feeding standards. The best results were obtained in animals fed the diet including 25 - 35 kg potato-molasses distillers’ residue (depending on animals’ live weight during the experimental period) supplemented with ammonium salts