Single proton energies in the Si isotopes and theZ=14subshell closure

2007 ◽  
Vol 76 (2) ◽  
Author(s):  
P. D. Cottle
Keyword(s):  
Single Proton ◽  
Si Isotopes

MR imaging and single proton spectroscopy in siblings with late onset krabbe disease

2008 ◽  
Vol 39 (01) ◽  
Author(s):  
U Gruber-Sedlmayr ◽  
M Brunner-Krainz ◽  
E Sorantin ◽  
W Sauseng ◽  
B Plecko
Keyword(s):  
Mr Imaging ◽  
Late Onset ◽  
Krabbe Disease ◽  
Proton Spectroscopy ◽  
Single Proton

High-lying single-proton states in spherical nuclei

1983 ◽  
Vol 130 (3-4) ◽  
pp. 134-138 ◽  
Author(s):  
Ch. Stoyanov ◽  
A.I. Vdovin
Keyword(s):  
Single Proton ◽  
Spherical Nuclei

Observation of a single proton transfer fluorescence in a biaxially symmetric dihydroxy diflavonol

2002 ◽  
Vol 352 (5-6) ◽  
pp. 415-420 ◽  
Author(s):  
Elena Falkovskaia ◽  
Vasyl G. Pivovarenko ◽  
Juan Carlos del Valle
Keyword(s):  
Proton Transfer ◽  
Single Proton

scholarly journals Silicon isotopes in Antarctic sponges: an interlaboratory comparison

2010 ◽  
Vol 23 (1) ◽  
pp. 34-42 ◽  
Author(s):  
Katharine R. Hendry ◽  
Melanie J. Leng ◽  
Laura F. Robinson ◽  
Hilary J. Sloane ◽  
Jerzy Blusztjan ◽  
...  
Keyword(s):  
Southern Ocean ◽  
Matrix Effects ◽  
Global Climate ◽  
Intermediate Water ◽  
Silicon Isotopes ◽  
Important Player ◽  
Si Isotopes ◽  
Si Isotope ◽  
Additional Reference ◽  
Antarctic Sponges

AbstractCycling of deepwater silicon (Si) within the Southern Ocean, and its transport into other ocean basins, may be an important player in the uptake of atmospheric carbon, and global climate. Recent work has shown that the Si isotope (denoted by δ29Si or δ30Si) composition of deep sea sponges reflects the availability of dissolved Si during growth, and is a potential proxy for past deep and intermediate water silicic acid concentrations. As with any geochemical tool, it is essential to ensure analytical precision and accuracy, and consistency between methodologies and laboratories. Analytical bias may exist between laboratories, and sponge material may have matrix effects leading to offsets between samples and standards. Here, we report an interlaboratory evaluation of Si isotopes in Antarctic and sub-Antarctic sponges. We review independent methods for measuring Si isotopes in sponge spicules. Our results show that separate subsamples of non-homogenized sponges measured by three methods yield isotopic values within analytical error for over 80% of specimens. The relationship between δ29Si and δ30Si in sponges is consistent with kinetic fractionation during biomineralization. Sponge Si isotope analyses show potential as palaeoceaongraphic archives, and we suggest Southern Ocean sponge material would form a useful additional reference standard for future spicule analyses.

scholarly journals One-proton catalysis by the α-l-arabinofuranosidase III of Monilinia fructigena

1988 ◽  
Vol 254 (3) ◽  
pp. 899-901 ◽  
Author(s):  
T Selwood ◽  
M L Sinnott
Keyword(s):  
Isotopic Composition ◽  
Isotope Effect ◽  
Solvent Isotope Effect ◽  
Monilinia Fructigena ◽  
Single Proton ◽  
Solvent Isotope ◽  
Hydrolysis Of

1. Michaelis-Menten parameters for the hydrolysis of p-nitrophenyl alpha-L-arabinofuranoside were measured as a function of pL (pH or pD) in both 1H2O and 2H2O. 2. The variation of both Vmax. and Vmax./Km with pL is sigmoid, the pK governing Vmax. shifting from 6.34 +/- 0.05 in 1H2O to 6.84 +/- 0.07 in 2H2O, and that governing Vmax./Km from 5.89 +/- 0.03 in 1H2O to 6.38 +/- 0.05 in 2H2O. 3. In the plateau regions there is a small inverse solvent isotope effect on Vmax./Km (0.92), and one of 1.45 on Vmax. 4. The variation of Vmax. with isotopic composition is strictly linear, indicating that the isotope effect arises from the transfer of a single proton.

Silicon nanocrystal synthesis by implantation of natural Si isotopes

2010 ◽  
Vol 130 (4) ◽  
pp. 669-673 ◽  
Author(s):  
D. Barba ◽  
D. Koshel ◽  
F. Martin ◽  
G.G. Ross ◽  
M. Chicoine ◽  
...  
Keyword(s):  
Silicon Nanocrystal ◽  
Nanocrystal Synthesis ◽  
Si Isotopes

Single-Proton States inBi209Corresponding to the Shell82

1967 ◽  
Vol 19 (12) ◽  
pp. 709-713 ◽  
Author(s):  
J. S. Lilley ◽  
Nelson Stein
Keyword(s):  
Single Proton
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