Results 261 to 270 of about 135,534 (288)

Understanding the photophysics of stercobilin-Zn(II) and urobilin-Zn(II) complexes towards faecal pigment analysis

Chemosphere, 2021
A detailed photophysical study of two faecal pigments (FPs), Urobilin (UB) and Stercobilin (SB), and their zinc complexes [FP-Zn(II)] was carried out. The enhancement of UB and SB fluorescence resulting from the formation of their Zn(II) complexes was attributed to the complexation-induced rigidity of the chromophoric units, and the corresponding ...
Swayam Prakash, Suraj Kumar Panigrahi, Rebecca Paulina Dorner, Martin Wagner, Wido Schmidt, Ashok Kumar Mishra   +5 more
openaire   +2 more sources

The exchange reaction Zn(II)/Zn(Hg) in alkali

Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1968
Summary Impedance measurements at a stationary amalgam electrode are reported. The reaction is confirmed to be charge-transfer controlled and involves complex formation. At 22° the value of K 0 /(K 3 K 4 ) 1−α , the determinable rate constant, is 1±0.05·10 −3 cm sec −1 . The enthalpy of activation is 10.8±1.0 kcal mole −1 .
J.P.G. Farr, N.A. Hampson
openaire   +2 more sources

Effects of Zn(II) on galactosyltransferase activity

Journal of Protein Chemistry, 1993
The enzyme beta-4-galactosyltransferase (GT) catalyzes the transfer of a galactosyl group from UDP-galactose to N-acetylglucosamine (GlcNAc) on glycoproteins. In the presence of alpha-lactalbumin (alpha-LA), galactosyltransferase catalyzes the transfer of galactose to glucose to yield lactose.
E A, Permyakov, I L, Reyzer, L J, Berliner   +2 more
openaire   +2 more sources

Photocatalytic Reduction of Zn(II) with Participation of ZnS Nanoparticles

Theoretical and Experimental Chemistry, 2005
We have studied the photochemical processes occurring in colloidal ZnS solutions containing zinc chloride and sodium sulfite as additives. Irradiation of such systems leads to reduction of Zn(II), the rate of which increases as the size of the ZnS nanoparticles decreases.
A. E. Raevskaya, A. V. Korzhak, A. L. Stroyuk, S. Ya. Kuchmii   +3 more
openaire   +1 more source

Complexes of Zn(II) and Mn(II) with biacetyldihydrazone

Polyhedron, 1982
Abstract The complexes [Zn(BdH)2Cl2] and [Mn(BdH)2Cl2] have been prepared and studied by IR, electronic and ESR spectroscopies and by magnetic measurements. All results agree with a molecular formula for both complexes and a distorted octahedral environment for the metal atoms.
A.E. Sanchez Pelaez, M.J. Gonzalez Garmendia   +1 more
openaire   +1 more source

Electron-impact excitation of Zn II. II

Physical Review A, 1982
Collision strengths are calculated for excitation of Zn II from the 4s ground state to excited states 4p, 3d/sup 9/4s/sup 2/, 5s, and 4d in a five-state close-coupling approximation for the electron-impact energy range ...
Alfred Z. Msezane, Ronald J. W. Henry
openaire   +1 more source

Synthesis, Characterization and Fluorescence Properties of Zn(II) and Cu(II) Complexes: DNA Binding Study of Zn(II) Complex

Journal of Fluorescence, 2015
Zinc(II) and copper(II) complexes containing Schiff base, 2- methoxy-6((E)-(phenylimino) methyl) phenol ligand (HL) were synthesized and characterized by elemental analysis, IR, NMR, and single crystal X-ray diffraction technique. The fluorescence properties and quantum yield of zinc complex were studied.
Parirokh, Lavaee, Hossein, Eshtiagh-Hosseini, Mohammad Reza, Housaindokht, Joel T, Mague, Abbas Ali, Esmaeili, Khalil, Abnous   +5 more
openaire   +2 more sources

Competitive Fe(II)–Zn(II) Uptake on a Synthetic Montmorillonite

Environmental Science & Technology, 2013
The interaction of Fe(II) with clay minerals is of particular relevance in global geochemical processes controlling metal and nutrient cycles and the fate of contaminants. In this context, the influence of competitive sorption effects between Fe(II) and other relevant transition metals on their uptake characteristics and mobility remains an important ...
Soltermann Daniela, Marques Fernandes Maria, Baeyens Bart, Miehé-Brendlé Jocelyne, Dähn Rainer   +4 more
openaire   +3 more sources

???????????? ???????????????????????????????????? Cu (II) ?? Zn (II) ?? ???? ????????????????

2022
?????????????? ?????????????????????? ???????????????????? ???? ???????????? ?????????????????????????? ???????????????? ?? ?????????????????????????????? ?????????????????????????? ?????????????????? ???????????????? ?????? ??????????. ???????? ?????????????? ?????????????????????? ???????????????????????? ?????????? ???????????? ????????????????????,
openaire   +1 more source

???????????????????? ?? ?????????????????????? ??d(II) ?? Zn(II), ???????????????????? ???? ???????????????????????? ?????????????????????? ???? ???????????????????????????? ????????????????????

2023
?????????????????? ???????????? ???????????????????????????????? Cd (II) ?? ?????????????????? ?????? ???? Zn( II) ???? ???????????? ?????????????????? ???? ???????????????????????????????????? ???????????????????? ???????????????? ???? ????????????????????, ???????????????????????????? N-????????????-N???-??????????????????????????????????. ???????????
openaire   +1 more source