The Structure of the Hydrated Gallium(III), Indium(III), and Chromium(III) Ions in Aqueous Solution. A Large Angle X-ray Scattering and EXAFS Study

1998 ◽  
Vol 37 (26) ◽  
pp. 6675-6683 ◽  
Author(s):  
Patric Lindqvist-Reis ◽  
Adela Muñoz-Páez ◽  
Sofia Díaz-Moreno ◽  
Sidhartha Pattanaik ◽  
Ingmar Persson ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Large Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Exafs Study ◽  
Ray Scattering

scholarly journals Second-Sphere Hydration of Rhodium(III) and Chromium(III) in Aqueous Solution. A Large-Angle X-Ray Scattering and EXAFS Study.

1992 ◽  
Vol 46 ◽  
pp. 1177-1182 ◽  
Author(s):  
Michael C. Read ◽  
Magnus Sandström ◽  
Antonio de la Hoz ◽  
Johan Springborg ◽  
Markku R. Sundberg ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Large Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Exafs Study ◽  
Ray Scattering

scholarly journals A Large-angle X-Ray Scattering Study of 9-Molybdomonophosphate Complexes in Aqueous Solution.

1978 ◽  
Vol 32a ◽  
pp. 407-414 ◽  
Author(s):  
Georg Johansson ◽  
Lage Pettersson ◽  
Nils Ingri ◽  
Elina Näsäkkälä ◽  
Otto Bastiansen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Large Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Study ◽  
Ray Scattering

scholarly journals A Large-angle X-Ray Scattering Investigation of Some Polynuclear Molybdoarsenate Complexes in Aqueous Solution.

1978 ◽  
Vol 32a ◽  
pp. 681-688 ◽  
Author(s):  
Georg Johansson ◽  
Lage Pettersson ◽  
Nils Ingri ◽  
Martti Rantala
Keyword(s):  
Aqueous Solution ◽  
Large Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

The Hydration of Tungstate and Molybdate Ions in Aqueous Solution

1986 ◽  
Vol 41 (11) ◽  
pp. 1325-1329 ◽  
Author(s):  
Georg Johansson ◽  
Ruggero Caminiti
Keyword(s):  
Aqueous Solution ◽  
Crystal Structures ◽  
Hydration Shell ◽  
Large Angle ◽  
Water Molecules ◽  
X Ray ◽  
Bond Lengths ◽  
X Ray Scattering ◽  
Scattering Measurements ◽  
Ray Scattering

The structure in aqueous solution of the hydrated tungstade and molybdate ions WO42- and MoO42- has been derived from large angle X-ray scattering measurements using MoO42- as an isomorphous substituent for WO42- The W(Mo)-O bond lengths are 1.786 Å and do not differ from those found in crystal structures. A fairly well-defined hydration shell of about 12 water molecules surrounds the XO42- ions at a W(Mo)-H2O distance of 4.06 Å.

A Small-Angle X-Ray Scattering Study on Pre-Irradiated Malate Synthase. The Influence of Formate, Superoxide Dismutase, and Catalase on the X-Ray Induced Aggregation of the Enzyme

1985 ◽  
Vol 40 (5-6) ◽  
pp. 364-372 ◽  
Author(s):  
P. Zipper ◽  
R. Wilfing ◽  
M. Kriechbaum ◽  
H. Durchschlag
Keyword(s):  
Aqueous Solution ◽  
Superoxide Dismutase ◽  
Small Angle ◽  
Malate Synthase ◽  
X Ray ◽  
X Ray Scattering ◽  
X Irradiation ◽  
The Mean ◽  
Induced Aggregation ◽  
Ray Scattering

Abstract The sulfhydryl enzyme malate synthase from baker’s yeast was X-irradiated with 6 kGy in air-saturated aqueous solution (enzyme concentration: ≃ 10 mg/ml; volume: 120 μl), in the absence or presence of the specific scavengers formate, superoxide dismutase, and catalase. After X-irradiation, a small aliquot of the irradiated solutions was tested for enzymic activity while the main portion was investigated by means of small-angle X-ray scattering. Additionally, an unir­radiated sample without additives was investigated as a reference. Experiments yielded the fol­lowing results: 1. X-irradiation in the absence of the mentioned scavengers caused considerable aggregation, fragmentation, and inactivation of the enzyme. The dose Dt37 for total (= repairable + non­-repayable) inactivation resulted as 4.4 kGy. The mean radius of gyration was found to be about 13 nm. The mean degree of aggregation was obtained as 5.7, without correction for fragmenta­tion. An estimation based on the thickness factor revealed that about 19% of material might be strongly fragmented. When this amount of fragments was accordingly taken into account, a value of 7.1 was obtained as an upper limit for the mean degree of aggregation. The observed retention of the thickness factor and the finding of two different cross-section factors are in full accord with the two-dimensional aggregation model established previously (Zipper and Durchschlag, Radiat. Environ. Biophys. 18, 99 - 121 (1980)). 2. The presence of catalytic amounts of superoxide dismutase and/or catalase, in the absence of formate, during X-irradiation reduced both aggregation and inactivation significantly. 3. The presence of formate (10 or 100 mᴍ) during X-irradiation led to a strong decrease of aggregation and inactivation. This effect was more pronounced with the higher formate concen­tration or when superoxide dismutase and/or catalase were simultaneously present during X-irradiation. The presence of formate also reduced the amount of fragments significantly. 4. The results clearly show that the aggregation and inactivation of malate synthase upon X-irradiation in aqueous solution are mainly caused by OH·; to a minor extent O·̄2 and H2O2 are additionally involved in the damaging processes.

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