in this work, zeolite nay was prepared by hydrothermal method. then, silver ions were replaced in the zeolite nay with silver nitrate (agno3) solution via using ion exchange (ie) method. the manganese dioxide (mno2) nanoparticles (9.3 and 15.8 wt %) for guest were deposited in the zeolite agy(host) structure with mn(no3)2 aqueous and kmno4 solutions by confined space synthesis (css) method. syn...

Ionic conductivity σ i measurements of AgY−As 2 S 3 (Y = Br, I) glasses, covering 13 orders magnitude in ( x ) over 5 silver content , confirm two drastically different ion transport regimes halide thioarsenate glasses. As expected, the ionic critical percolation domain, 20 ppm < ≤ at.% Ag, follows a power-law dependence, T ∝ 0 / where temperature is related to connectivity glassy host. Moreove...

The suicide inhibitory mechanism of serine protease inhibitors of the serpin superfamily depends heavily on their structural flexibility, which is controlled in large part by the breach and shutter regions of the central Abeta-sheet. We examined codon usage by the highly conserved residues, Ser-53 and Ser-56, of the shutter region and found a TCN-AGY usage dichotomy for Ser-56 that remarkably i...

Residue 225 in serine proteases is typically Pro or Tyr and specifies an important and unanticipated functional aspect of this class of enzymes. Proteases with Y225, like thrombin, are involved in highly specialized functions like blood coagulation and complement that are exclusively found in vertebrates. In these proteases, the catalytic activity is enhanced allosterically by Na+ binding. Prot...

Jonah Lehrer könyve a döntéshozatali folyamatokat vizsgálja és mutatja be kifejezetten szemléletes gyakorlati példákon keresztül. Az írás alapkérdéseit szerz? így fogalmazza meg: „Hogyan hoz döntéseket az emberi elme? És hogyan lehet ezeken döntéseken javítani?” (Lehrer, 2012). A mechanizmusok meghatározzák mindennapjainkat. Igaz ez munkahelyi életünkre csakúgy, mint magánéletünkre. tudomány ké...

The majority of gold(I) catalysts employed in organic transformations in homogeneous systems are presently generated in situ by reactions of gold halides AuX or their 1 : 1 complexes [(L)AuX] with silver salts AgY (X = Cl, Br; L = R3P, NHC, tht etc.; Y = BF4, PF6, SbF6, OSO2CF3, OC(O)CF3 etc.). This usage of silver salts is not only economically unfavorable, but also has several practical disad...