Macroaggregates

Six, J., Elliott, E. T., and Paustian, K. (2000a). Soil macroaggregate turnover and microaggregate formation A mechanism for C sequestration under no-tillage agriculture. Soil Biol. Biochem. 32(14), 2099-2103. 

Concerning thermodynamically unstable emulsions, the creation of new interfaces from the disruption of the disperse phase increases the free energy of the system, which tends to return to the original two separate systems. Therefore, the use of emulsifier is necessary not only to reduce the interracial tension, but also to avoid the coalescence and the formation of macroaggregates thanks to electrostatic repulsion between adsorbed emulsifier. 

Micro and macroaggregated spheres of HSA, for evaluation of the lung arteriolar capillary bed151. 

Cadee G. C. (1985) Macroaggregates of Emiliania huxleyi in sediment traps. Mar. Ecol. Prog. Ser. 24, 193-196. 

Figure 25 Low-temperature scanning electron microscopy of (a) a portion of a soil macroaggregate with fungal material bridging soil particles (arrow) and (b) mucigel produced along fungal hyphae (arrow) (Caesar-TonThat and Cochran, 2000) (reproduced by permission of Springer Verlag from Biol. Fert.

M.B. Use of macroaggregated albumin lung perfusion scan to diagnose hepatopulmonary syndrome a new approach. Gastroenterology 1998 114 305-310... 

Carbonaro, M., Bonomi, F., lametti, S., Cappelloni, M., and Camovale, E., Aggregation of proteins in whey from raw and heat-processed milk Formation of soluble macroaggregates and nutritional consequences, Lebensm. Wiss. TechnoL, 31, 522, 1998. 

Surfactants might be required to solubilize lipophilic Tc complexes (MIBI) (Berg-stein and Subramanyam 1986) and particulate preparations (macroaggregated albumin, microspheres). 

Chemical name Macroaggregated human serum albumin (MAA) Technetium 99m Macrosalb injection (Ph. Eur.) Tc-MAA -It . -r V s . 1 Albumin Macroaggregates (Small square 50x50 pm, 150-fold)... 

Commercial kits contain the lyophilized, sterile components in a multidose vial, sealed under a nitrogen atmosphere. Labeling is carried out by adding aseptically a volume of 2-10 ml of sterile Tc-pertechnetate to the vial with an activity up to 3.7 GBq. The manufacturer s instructions should be followed. The lyophilized material will dissolve by agitating the reaction vial. The reaction should be allowed to proceed for 5-20 min, with occasional agitation. Tc-macroaggregated albumin (MAA) is a pale-white suspension ready for intravenous injection. The pH of the suspension is 3.5-7.5. 

Macroaggregates are obtained by aggregation of human serum albumin (HSA). HSA is isolated from donor blood and complies with the purity standards stated in the European Pharmacopeia, monographs 255 and 853) (Council of Europe 2004a, b) in accordance with EU and WHO requirements for biological substances (Council of Europe 1992 World Health Organization 1994). 

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