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Small-angle X-ray scattering from metal-ammonia solutions (1978)

Knapp, D. N. ; Bale, H. D.

Copenhagen : International Union of Crystallography (IUCr)

Applied crystallography online 11 (1978), S. 606-609

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ISSN: 1600-5767

Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001

Topics: Geosciences , Physics

Notes: Small-angle X-ray scattering measurements have been made on lithium-ammonia and sodium-ammonia solutions for a number of concentrations and temperatures. The salient features of the scattering curves are the critical scattering observed near the critical mixing point and the noncritical scattering characterized by a maximum at the larger angles of the small-angle region. With decreasing metal-ion concentration, the position of the maximum moves to smaller angles and becomes less pronounced. The noncritical scattering was shown to be consistent with that expected for a system of spherical scattering centers (metal ions solvated by four ammonia molecules) of approximately 7 to 8 Å diameter. Radial distribution functions were calculated in terms of this model. Values for the extrapolated zero-angle scattering were used to calculate Scc(0), the concentration partial structure factor of Bhatia and Thornton. The X-ray determinations of Scc(0) were found to be in reasonable agreement with previous values based on thermodynamic results.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1107/S0021889878013990

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204. MikrogefäBchirurgie an der Hand (1977)

Biemer, E. ; Duspiva, W. ; Stock, W. ; [et al.]

Springer

Langenbeck's archives of surgery 345 (1977), S. 645-645

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ISSN: 1435-2451

Keywords: Microvascular surgery, on the hand ; MikrogefäBchirurgie an der Hand

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Description / Table of Contents: ZusammenfaBung Die AuBtellung zeigt typische Beispiele von Replantationen im Handbereich mit funktionellen ErgebniBen. Ferner werden Beispiele gezeigt, bei denen der Daumen durch eine Langfingertransplantation ersetzt wurde, wenn das Daumenamputat zerstört war. Eine andere Möglichkeit des Daumenersatzes durch eine freie 2. Zehentransplantation mit mikrogefäBchirurgischem AnschluB wird ebenfalls vorgestellt.

Notes: Summary The exhibition shows typical examples of replantations of the hand and the long-term functional results. It also shows the results of transplantation of fingers for thumb replacement when the thumb is totally destroyed. Another poBibility for thumb replacement is the second toe transfer by microvascular anastomoses, which is als shown.