scholarly journals Molecular size distribution of Pu in the presence of humic substances in river and groundwaters

2007 ◽  
Vol 273 (1) ◽  
pp. 135-139 ◽  
Author(s):  
S. Nagao ◽  
Y. Sakamoto ◽  
T. Tanaka ◽  
R. R. Rao
Keyword(s):  
Humic Substances ◽  
Size Distribution ◽  
Molecular Size ◽  
Molecular Size Distribution

scholarly journals Molecular-size-distribution-dependent aggregation of humic substances by Na(I), Ag(I), Ca(II), and Eu(III)

2013 ◽  
Vol 434 ◽  
pp. 9-15 ◽  
Author(s):  
Shuji Tamamura ◽  
Ryutaro Ohashi ◽  
Seiya Nagao ◽  
Masayoshi Yamamoto ◽  
Motohiro Mizuno
Keyword(s):  
Humic Substances ◽  
Size Distribution ◽  
Molecular Size ◽  
Molecular Size Distribution

Molecular size distribution of soil humic substances with ionic strength

1989 ◽  
Vol 81-82 ◽  
pp. 471-479 ◽  
Author(s):  
B. Ceccanti ◽  
M. Calcinai ◽  
M. Bonmati-Pont ◽  
C. Ciardi ◽  
R. Tarsitano
Keyword(s):  
Ionic Strength ◽  
Humic Substances ◽  
Size Distribution ◽  
Molecular Size ◽  
Molecular Size Distribution

Determination of the Size Distribution of Dissolved Organics in Effluents

1973 ◽  
Vol 8 (1) ◽  
pp. 1-15 ◽  
Author(s):  
L.A. Addie ◽  
K.L. Murphy ◽  
J.L. Robertson
Keyword(s):  
Size Distribution ◽  
Biological Treatment ◽  
Oxygen Demand ◽  
Molecular Size ◽  
Monitoring Systems ◽  
Clean Surface ◽  
Sephadex Column ◽  
Dissolved Organics ◽  
Molecular Size Distribution

Abstract The importance of removing the small amounts of residual organics is increasing as the sources of clean surface water decrease. Knowledge of the nature of these soluble residual organics will be needed in order to assess the type of treatment required for their removal. Residual organics in three different biological treatment plants were analyzed and compared. An attempt was made to characterize these organics by a molecular size distribution on a Sephadex column monitored by differential ultraviolet and refractive index detectors. The organic carbon and chemical oxygen demand of the fractions collected from the column was also determined. An investigation of some of the problems inherent in the monitoring systems was conducted.

Molecular Size Distribution of Lignin in Wood

Nature ◽  
1967 ◽  
Vol 214 (5086) ◽  
pp. 410-411 ◽  
Author(s):  
W. BROWN ◽  
S. I. FALKEHAG ◽  
E. B. COWLING
Keyword(s):  
Size Distribution ◽  
Molecular Size ◽  
Molecular Size Distribution

A Study of the Malpighian Tubules of the Pill Millipede, Glomeris marginata (Villers)

1974 ◽  
Vol 60 (1) ◽  
pp. 41-51
Author(s):  
PATRICIA ANNE FARQUHARSON
Keyword(s):  
Size Distribution ◽  
Fluid Transport ◽  
Molecular Size ◽  
Malpighian Tubules ◽  
Inverse Relation ◽  
Fluid Production ◽  
Molecular Size Distribution ◽  
Molecular Sieving ◽  
Tubule Fluid ◽  
Tubule Wall

1. Tubule fluid:medium ratios (TF/M) have been measured for inulin, glucose, LMWD and HMWD. These TF/M ratios were surprisingly high. 2. The tubule appears to act as a molecular filter; that is to say, molecules move through the tubule wall in inverse relation to their size. This is best illustrated using polyvinyl pyrrolidone as a tracer. The molecular size distribution of PVP fractions present in tubule fluid differs markedly from the molecular size distribution of PVP in the bathing Ringer. 3. No correlation can be made between the inulin and glucose TF/M and the rate of fluid production. However, the inverse relationship between TF/M and rate of fluid production for dextrans indicates a molecular sieving effect. 4. The significance of these results is discussed with reference to models of fluid transport.

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