Blood sediment formation at high haematocrit

2003 ◽  
Author(s):  
Ewa Kowalinska ◽  
Bronislaw Grzegorzewski
Keyword(s):  
Sediment Formation ◽  
High Haematocrit

scholarly journals Changes in Particle Size, Sedimentation, and Protein Microstructure of Ultra-High-Temperature Skim Milk Considering Plasmin Concentration and Storage Temperature

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2339
Author(s):  
So-Yul Yun ◽  
Jee-Young Imm
Keyword(s):  
Particle Size ◽  
High Temperature ◽  
Storage Temperature ◽  
Whey Proteins ◽  
Skim Milk ◽  
Storage Period ◽  
Sediment Analysis ◽  
Sediment Formation ◽  
And Storage ◽  
Ultra High Temperature

Age gelation is a major quality defect in ultra-high-temperature (UHT) pasteurized milk during extended storage. Changes in plasmin (PL)-induced sedimentation were investigated during storage (23 °C and 37 °C, four weeks) of UHT skim milk treated with PL (2.5, 10, and 15 U/L). The increase in particle size and broadening of the particle size distribution of samples during storage were dependent on the PL concentration, storage period, and storage temperature. Sediment analysis indicated that elevated storage temperature accelerated protein sedimentation. The initial PL concentration was positively correlated with the amount of protein sediment in samples stored at 23 °C for four weeks (r = 0.615; p < 0.01), whereas this correlation was negative in samples stored at 37 °C for the same time (r = −0.358; p < 0.01) due to extensive proteolysis. SDS-PAGE revealed that whey proteins remained soluble over storage at 23 °C for four weeks, but they mostly disappeared from the soluble phase of PL-added samples after two weeks’ storage at 37 °C. Transmission electron micrographs of PL-containing UHT skim milk during storage at different temperatures supported the trend of sediment analysis well. Based on the Fourier transform infrared spectra of UHT skim milk stored at 23 °C for three weeks, PL-induced particle size enlargement was due to protein aggregation and the formation of intermolecular β-sheet structures, which contributed to casein destabilization, leading to sediment formation.

Contribution of casein micelle size and proteolysis on protein distribution and sediment formation in UHT milk during storage

2021 ◽  
Vol 117 ◽  
pp. 104980
Author(s):  
Marije Akkerman ◽  
Lene Buhelt Johansen ◽  
Valentin Rauh ◽  
Nina Aagaard Poulsen ◽  
Lotte Bach Larsen
Keyword(s):  
Casein Micelle ◽  
Protein Distribution ◽  
Uht Milk ◽  
Micelle Size ◽  
Sediment Formation

The chemical variability at the surface of Mars: Implication for sediment formation and rock weathering

Icarus ◽  
2006 ◽  
Vol 183 (1) ◽  
pp. 10-29 ◽  
Author(s):  
C KOLB ◽  
J MARTINFERNANDEZ ◽  
R ABART ◽  
H LAMMER
Keyword(s):  
Rock Weathering ◽  
Sediment Formation ◽  
Chemical Variability

scholarly journals Ocean acidification induces biochemical and morphological changes in the calcification process of large benthic foraminifera

2015 ◽  
Vol 282 (1803) ◽  
pp. 20142782 ◽  
Author(s):  
Martina Prazeres ◽  
Sven Uthicke ◽  
John M. Pandolfi
Keyword(s):  
Ocean Acidification ◽  
Benthic Foraminifera ◽  
Morphological Changes ◽  
Ambient Conditions ◽  
Skeletal Density ◽  
Buoyant Weight ◽  
Large Benthic Foraminifera ◽  
Sediment Formation ◽  
Ph Conditions ◽  
Main Factor

Large benthic foraminifera are significant contributors to sediment formation on coral reefs, yet they are vulnerable to ocean acidification. Here, we assessed the biochemical and morphological impacts of acidification on the calcification of Amphistegina lessonii and Marginopora vertebralis exposed to different pH conditions. We measured growth rates (surface area and buoyant weight) and Ca-ATPase and Mg-ATPase activities and calculated shell density using micro-computer tomography images. In A. lessonii , we detected a significant decrease in buoyant weight, a reduction in the density of inner skeletal chambers, and an increase of Ca-ATPase and Mg-ATPase activities at pH 7.6 when compared with ambient conditions of pH 8.1. By contrast, M. vertebralis showed an inhibition in Mg-ATPase activity under lowered pH, with growth rate and skeletal density remaining constant. While M. vertebralis is considered to be more sensitive than A. lessonii owing to its high-Mg-calcite skeleton, it appears to be less affected by changes in pH, based on the parameters assessed in this study. We suggest difference in biochemical pathways of calcification as the main factor influencing response to changes in pH levels, and that A. lessonii and M. vertebralis have the ability to regulate biochemical functions to cope with short-term increases in acidity.

Mathematical simulation of two-phase fluid flow through a water-flooded porous reservoir with sediment formation

2011 ◽  
Vol 46 (1) ◽  
pp. 90-96
Author(s):  
G. R. Idrisova ◽  
L. A. Kovaleva ◽  
M. V. Mavletov ◽  
A. A. Musin
Keyword(s):  
Fluid Flow ◽  
Mathematical Simulation ◽  
Two Phase ◽  
Sediment Formation ◽  
Porous Reservoir ◽  
Flow Through ◽  
Phase Fluid
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