scholarly journals A vaginal ultrasound probe is better than nothing

Anaesthesia ◽  
2003 ◽  
Vol 58 (2) ◽  
pp. 200-201 ◽  
1998 ◽  
Vol 69 (3) ◽  
pp. 409-411 ◽  
Author(s):  
Amin A Milki M.D. ◽  
Jeffrey D Fisch M.D.

1994 ◽  
Vol 74 (6) ◽  
pp. 749-752 ◽  
Author(s):  
L. MOURISTSEN ◽  
C. STRANDBERG ◽  
C. FRIMODT-MOLLER

2021 ◽  
Vol 58 (S1) ◽  
pp. 48-49
Author(s):  
E. Robinson ◽  
C. Kyriacou ◽  
J. Barcroft ◽  
N. Parker ◽  
C. Stalder ◽  
...  

1972 ◽  
Vol 1 ◽  
pp. 27-38
Author(s):  
J. Hers

In South Africa the modern outlook towards time may be said to have started in 1948. Both the two major observatories, The Royal Observatory in Cape Town and the Union Observatory (now known as the Republic Observatory) in Johannesburg had, of course, been involved in the astronomical determination of time almost from their inception, and the Johannesburg Observatory has been responsible for the official time of South Africa since 1908. However the pendulum clocks then in use could not be relied on to provide an accuracy better than about 1/10 second, which was of the same order as that of the astronomical observations. It is doubtful if much use was made of even this limited accuracy outside the two observatories, and although there may – occasionally have been a demand for more accurate time, it was certainly not voiced.


Author(s):  
J. Frank ◽  
P.-Y. Sizaret ◽  
A. Verschoor ◽  
J. Lamy

The accuracy with which the attachment site of immunolabels bound to macromolecules may be localized in electron microscopic images can be considerably improved by using single particle averaging. The example studied in this work showed that the accuracy may be better than the resolution limit imposed by negative staining (∽2nm).The structure used for this demonstration was a halfmolecule of Limulus polyphemus (LP) hemocyanin, consisting of 24 subunits grouped into four hexamers. The top view of this structure was previously studied by image averaging and correspondence analysis. It was found to vary according to the flip or flop position of the molecule, and to the stain imbalance between diagonally opposed hexamers (“rocking effect”). These findings have recently been incorporated into a model of the full 8 × 6 molecule.LP hemocyanin contains eight different polypeptides, and antibodies specific for one, LP II, were used. Uranyl acetate was used as stain. A total of 58 molecule images (29 unlabelled, 29 labelled with antl-LPII Fab) showing the top view were digitized in the microdensitometer with a sampling distance of 50μ corresponding to 6.25nm.


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