scholarly journals Erratum to Genes of Erwinia amylovora involved in yellow color formation and release of a low-molecular-weight compound during growth in the presence of copper ions

2001 ◽  
Vol 264 (5) ◽  
pp. 732-733 ◽  
Author(s):  
Y. Zhang ◽  
S. Jock ◽  
K. Geider
Keyword(s):  
Molecular Weight ◽  
Erwinia Amylovora ◽  
Copper Ions ◽  
Low Molecular Weight ◽  
Color Formation ◽  
Yellow Color

Studies on the Nature and Excretion of Biliary Copper in Man

1973 ◽  
Vol 44 (1) ◽  
pp. 9-15 ◽  
Author(s):  
J. L. Gollan ◽  
D. J. Deller
Keyword(s):  
Molecular Weight ◽  
Gall Bladder ◽  
Copper Ions ◽  
Gel Filtration ◽  
Stable Complex ◽  
Low Molecular Weight ◽  
Macromolecular Complex ◽  
Hepatic Circulation ◽  
Heat Stable ◽  
Cupric Acetate

1. Gall-bladder bile was obtained at cholecystectomy from seven patients who had been given [64Cu]cupric acetate intravenously. 2. Studies using dialysis and Sephadex gel filtration indicated that most of the 64Cu in the bile was in a heat-stable complex of molecular weight exceeding 50 000. The remaining biliary 64Cu was in a low-molecular-weight component. 3. Above pH 4, 64Cu could not readily be removed from the macromolecular complex either by excess carrier copper ions, by d-penicillamine or by EDTA. 4. Absorption of 64Cu from 64Cu-labelled bile injected intraduodenally into rats was significantly less than from [64Cu]cupric acetate similarly injected. 5. These observations suggest that limitation of an entero-hepatic circulation of copper by a biliary macromolecule which differs from caeruloplasmin, may be a significant factor in copper homeostasis in man.

A high-performance oil-free backing pump for electron microscopes

1978 ◽  
Vol 36 (1) ◽  
pp. 110-111
Author(s):  
G.K.W. Balkau ◽  
E. Bez ◽  
J.L. Farrant
Keyword(s):  
Molecular Weight ◽  
Electron Microscope ◽  
Hot Spots ◽  
High Performance ◽  
Carbonaceous Material ◽  
Contamination Rate ◽  
Low Molecular Weight ◽  
Principal Source ◽  
Rotary Pumps ◽  
Electron Microscopes

The earliest account of the contamination of electron microscope specimens by the deposition of carbonaceous material during electron irradiation was published in 1947 by Watson who was then working in Canada. It was soon established that this carbonaceous material is formed from organic vapours, and it is now recognized that the principal source is the oil-sealed rotary pumps which provide the backing vacuum. It has been shown that the organic vapours consist of low molecular weight fragments of oil molecules which have been degraded at hot spots produced by friction between the vanes and the surfaces on which they slide. As satisfactory oil-free pumps are unavailable, it is standard electron microscope practice to reduce the partial pressure of organic vapours in the microscope in the vicinity of the specimen by using liquid-nitrogen cooled anti-contamination devices. Traps of this type are sufficient to reduce the contamination rate to about 0.1 Å per min, which is tolerable for many investigations.

Low-molecular-weight heparin in the prevention and treatment of thromboembolic disorders

1998 ◽  
Vol 1 (5) ◽  
pp. 166-174 ◽  
Author(s):  
Evelyn R Hermes De Santis ◽  
Betsy S Laumeister ◽  
Vidhu Bansal ◽  
Vandana Kataria ◽  
Preeti Loomba ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Low Molecular Weight Heparin ◽  
Low Molecular Weight ◽  
Prevention And Treatment
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