Binding Rare Earth Nano Materials with High Affinity and Forming Surface Coating

2022 ◽  
pp. 53-87
Author(s):  
Yunjiao Zhang
Keyword(s):  
Rare Earth ◽  
Surface Coating ◽  
Nano Materials ◽  
High Affinity

Antithrombin III Binding to Surface Immobilized Heparin and Its Relation to F Xa Inhibition

1987 ◽  
Vol 58 (04) ◽  
pp. 1064-1067 ◽  
Author(s):  
K Kodama ◽  
B Pasche ◽  
P Olsson ◽  
J Swedenborg ◽  
L Adolfsson ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Ionic Strength ◽  
Surface Coating ◽  
Antithrombin Iii ◽  
Lower Class ◽  
Biologically Active ◽  
High Affinity ◽  
Heparin Coating ◽  
Continuous Surface ◽  
Approximate Molecular Weight

SummaryThe mode of F Xa inhibition was investigated on a thromboresistant surface with end-point attached partially depoly-merized heparin of an approximate molecular weight of 8000. Affinity chromatography revealed that one fourth of the heparin used in surface coating had high affinity for antithrombin III (AT). The heparin surface adsorbed AT from both human plasma and solutions of purified AT. By increasing the ionic strength in the AT solution the existence of high and low affinity sites could be shown. The uptake of AT was measured and the density of available high and low affinity sites was found to be in the range of 5 HTid 11 pic.omoles/cmf, respectively Thus the estimated density of biologically active high and low ailmity heparm respectively would be 40 and 90 ng/cm2 The heparin coating did not take up or exert F Xa inhibition by itself. With AT adsorbed on both high and low affinity heparin the surface had the capacity to inhibit several consecutive aliquots of F Xa exposed to the surface. When mainly high affinity sites were saturated with AT the inhibition capacity was considerably lower. Tt was demonstrated that the density of AT on both high and low affinity heparin determines the F Xa inhibition capacity whereas the amount of AT on high affinity sites limits the rate of the reaction. This implies that during the inhibition of F Xa there is a continuous surface-diffusion of AT from sites of a lower class to the high affinity sites where the F Xa/AT complex is formed and leaves the surface. The ability of the immobilized heparin to catalyze inhibition of F Xa is likely to be an important component for the thromboresistant properties of a heparin coating with non-compromized AT binding sequences.

High Affinity to Skeleton Rare Earth Doped Nanoparticles for Near-Infrared II Imaging

Nano Letters ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 2985-2992 ◽  
Author(s):  
Shuqing He ◽  
Si Chen ◽  
Daifeng Li ◽  
Yifan Wu ◽  
Xiao Zhang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Near Infrared ◽  
High Affinity ◽  
Rare Earth Doped

Photo-Thermal Spectroscopy with Plasmonic and Rare-Earth Doped (Nano)Materials

2019 ◽  
Author(s):  
Ali Rafiei Miandashti ◽  
Susil Baral ◽  
Eva Yazmin Santiago ◽  
Larousse Khosravi Khorashad ◽  
Alexander O. Govorov ◽  
...  
Keyword(s):  
Rare Earth ◽  
Nano Materials ◽  
Rare Earth Doped

scholarly journals Influence of Compound Deoxidation of Steel with Al, Zr, Rare Earth Metals, and Ti on Properties of Heavy Castings

2012 ◽  
Vol 12 (1) ◽  
pp. 99-104 ◽  
Author(s):  
J. Senberger ◽  
J. Cech ◽  
A. Zadera
Keyword(s):  
Rare Earth ◽  
Grain Boundaries ◽  
Cooling Rate ◽  
Rare Earth Metals ◽  
High Affinity ◽  
Nitrogen Activity ◽  
Steel Castings ◽  
Heavy Castings ◽  
Nitrogen Contents ◽  
High Aluminium

Influence of Compound Deoxidation of Steel with Al, Zr, Rare Earth Metals, and Ti on Properties of Heavy Castings Heavy steel castings deoxidized with aluminium are sometimes brittle intercrystalline failed during their service along primary grain boundaries what is initiated by aluminium nitrides and so called conchoidal fractures are formed. The tendency to forming the conchoidal fractures depends in particular on cooling rate (the casting modulus), aluminium and nitrogen contents in steel. During deoxidation, when manufacturing heavy castings, the elements with high affinity to nitrogen, zirconium or titanium, are added to steel that would decrease nitrogen activity by the bond on stable nitrides. The formation of stable nitrides should reduce the tendency of steel to the formation of conchoidal fractures. Deoxidation was thermodynamically analyzed at presence of the mentioned elements. For particular conditions a probable course of deoxidation was estimated at test castings. The deoxidation course was checked by microanalysis of deoxidation products (inclusions). For service and experimental castings the anticipated composition of inclusions was compared. It has been proved that in heavy castings with high aluminium contents in steel under studied conditions neither the addition of zirconium nor of titanium nor of rare earth metals will prevent the formation of conchoidal fractures.

scholarly journals Effects of La and Ce Addition on the Modification of Al-Si Based Alloys

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Emad M. Elgallad ◽  
Herbert W. Doty ◽  
Saleh A. Alkahtani ◽  
Fawzy H. Samuel
Keyword(s):  
Rare Earth ◽  
Standard Deviation ◽  
Melting Temperature ◽  
Eutectic Temperature ◽  
Rare Earth Metals ◽  
Rare Earth Intermetallics ◽  
High Affinity ◽  
Eutectic Si ◽  
Microstructural Examination

This study focuses on the effects of the addition of rare earth metals (mainly lanthanum and cerium) on the eutectic Si characteristics in Al-Si based alloys. Based on the solidification curves and microstructural examination of the corresponding alloys, it was found that addition of La or Ce increases the alloy melting temperature and the Al-Si eutectic temperature, with an Al-Si recalescence of 2-3°C, and the appearance of post-α-Al peaks attributed to precipitation of rare earth intermetallics. Addition of La or Ce to Al-(7–13)% Si causes only partial modification of the eutectic Si particles. Lanthanum has a high affinity to react with Sr, which weakens the modification efficiency of the latter. Cerium, however, has a high affinity for Ti, forming a large amount of sludge. Due to the large difference in the length of the eutectic Si particles in the same sample, the normal use of standard deviation in this case is meaningless.

scholarly journals Progress of controllable synthesis of rare-earth containing perovskite nano-materials

2020 ◽  
Vol 50 (11) ◽  
pp. 1486-1503
Author(s):  
Zhichao Zeng ◽  
Yaping Du ◽  
Hongtu Zhang
Keyword(s):  
Rare Earth ◽  
Nano Materials ◽  
Controllable Synthesis
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