Formation of Si/organic interfaces using alkyne-functionalized cyclooctynes—precursor-mediated adsorption of linear alkynes versus direct adsorption of cyclooctyne on Si(0 0 1)

2018 ◽  
Vol 31 (3) ◽  
pp. 034001 ◽  
Author(s):  
C Länger ◽  
J Heep ◽  
P Nikodemiak ◽  
T Bohamud ◽  
P Kirsten ◽  
...  
Keyword(s):  
Organic Interfaces ◽  
Direct Adsorption

Plasma Contact Activation and Decrease of Factor V Activity on Negatively-Charged Polyelectrolytes

1984 ◽  
Vol 51 (01) ◽  
pp. 061-064 ◽  
Author(s):  
M C Boffa ◽  
B Dreyer ◽  
C Pusineri
Keyword(s):  
Time Dependent ◽  
Initial Contact ◽  
Factor Xii ◽  
Factor V ◽  
Contact Activation ◽  
Polyelectrolyte Complexes ◽  
Plasma Factor ◽  
Fresh Plasma ◽  
Direct Adsorption

SummaryThe effect of negatively-charged polymers, used in some artificial devices, on plasma clotting and kinin systems was studied in vitro using polyelectrolyte complexes.Contact activation was observed as an immediate, transient and surface-dependent phenomenon. After incubation of the plasma with the polymer a small decrease of factor XII activity was noticed, which corresponded to a greater reduction of prekallikrein activity and to a marked kinin release. No significant decrease of factor XII, prekallikrein, HMW kininogen could be detected immunologically. Only the initial contact of the plasma with the polyelectrolyte lead to activation, subsequently the surface became inert.Beside contact activation, factor V activity also decreased in the plasma. The decrease was surface and time-dependent. It was independent of contact factor activation, and appeared to be related to the sulfonated groups of the polymer. If purified factor V was used instead of plasma factor V, inactivation was immediate and not time-dependent suggesting a direct adsorption on the surface. A second incubation of the plasma-contacted polymer with fresh plasma resulted in a further loss of Factor V activity.

Molecular mechanism of activation of Burkholderia cepacia lipase at aqueous–organic interfaces

2017 ◽  
Vol 19 (46) ◽  
pp. 31499-31507 ◽  
Author(s):  
Ivan Pires de Oliveira ◽  
Gabriel Ernesto Jara ◽  
Leandro Martínez
Keyword(s):  
Molecular Mechanism ◽  
Burkholderia Cepacia ◽  
Burkholderia Cepacia Lipase ◽  
Organic Interfaces

Structure and thermodynamics of lipase activation at aqueous–organic interfaces.

Fabrication and Application of Polyethylenimine/Ca-Alginate Blended Hydrogel Fibers as High-Capacity Adsorbents for Recovery of Gold from Acidic Solutions

2017 ◽  
Vol 262 ◽  
pp. 103-106 ◽  
Author(s):  
John Kwame Bediako ◽  
Myung Hee Song ◽  
Yeoung Sang Yun
Keyword(s):  
High Capacity ◽  
Metallic Gold ◽  
X Ray Diffraction ◽  
Acidic Solutions ◽  
Xrd Study ◽  
Desorption Study ◽  
Alginate Fibers ◽  
Direct Adsorption ◽  
Ca Alginate ◽  
Alginate Matrix

High-capacity polyethylenimine (PEI)/Ca-alginate blended hydrogel fibers were fabricated via three steps, viz. electrostatic blending of PEI and alginate, ionotropic gelation of alginate and CaCl2, and fixing of PEI into the Ca-alginate matrix, using glutaraldehyde (GA) as a crosslinker. Two crosslinking approaches resulted in different stabilities and gold uptake capacities of the prepared sorbents. Post-crosslinking approach was more efficient than pre-crosslinking likely owing to the better crosslinking efficiency, leading to better stability and sorption capacity. Furthermore, X-ray diffraction (XRD) study revealed the reduction of Au (III) to metallic gold, Au (0) in the crosslinked fibers. The Au (0) predominancy was confirmed with a metal desorption study. The present study thus demonstrates the possibility of recovering metallic gold from aqueous solutions by direct adsorption-coupled-reduction approach using GA-crosslinked PEI/Ca-alginate fibers.

Organic–organic interfaces and unoccupied electronic states of thin films of perylene and naphthalene derivatives

2005 ◽  
Vol 744-747 ◽  
pp. 145-149 ◽  
Author(s):  
A.S. Komolov ◽  
P.J. Møller ◽  
Y.G. Aliaev ◽  
E.F. Lazneva ◽  
S. Akhremtchik ◽  
...  
Keyword(s):  
Thin Films ◽  
Electronic States ◽  
Naphthalene Derivatives ◽  
Organic Interfaces

High Efficiency Quantum Dot Sensitized Solar Cells Based on Direct Adsorption of Quantum Dots on Photoanodes

2017 ◽  
Vol 9 (27) ◽  
pp. 22549-22559 ◽  
Author(s):  
Wenran Wang ◽  
Guocan Jiang ◽  
Juan Yu ◽  
Wei Wang ◽  
Zhenxiao Pan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
High Efficiency ◽  
Sensitized Solar Cells ◽  
Direct Adsorption

scholarly journals Extracorporeal LDL-Cholesterol Elimination in the Treatment of Severe Familial Hypercholesterolemia

2003 ◽  
Vol 46 (1) ◽  
pp. 3-7 ◽  
Author(s):  
Milan Bláha
Keyword(s):  
Ldl Cholesterol ◽  
Familial Hypercholesterolaemia ◽  
Ldl Apheresis ◽  
Ecg Changes ◽  
Bicycle Ergometry ◽  
Life Saving ◽  
Significant Regression ◽  
Heterozygous Familial Hypercholesterolaemia ◽  
Atherosclerotic Changes ◽  
Direct Adsorption

The extracorporeal elimination of LDL-cholesterol could be performed using the classic non-selective centrifuge or membrane plasmapheresis. The modern methods are more selective and effective. The atherogenic particules are removed from plasma by active colon or capsula. The methods include: cascade filtration, imunoadsorbtion, heparin-induced precipitation of LDL, thermofiltration, dextran-induced precipitation of LDL and direct adsorption of lipids (DALI). The regular LDL-apheresis is the life-saving technique in the treatment of homozygous familial hypercholesterolaemia. It is used in heterozygous familial hypercholesterolaemia when the patients do not respond to diet and drugs therapy, too. The regular LDL-apheresis treatment may be followed by the decreased frequency of angina pain episodes, the reduction of ECG changes during the bicycle ergometry and significant disappearance of tendinous xantomas. Some prospective randomised studies has shown even in this group of patients, resistant to conventional treatment, a significant regression of atherosclerotic changes.

scholarly journals Luminous Efficiency Improvement of OLED by Thickness Variation of Organic Materials

2019 ◽  
Vol 8 (6) ◽  
pp. 4379-4382
Keyword(s):  
Light Emitting Diode ◽  
Luminous Efficiency ◽  
Hole Injection ◽  
Thickness Variation ◽  
Emission Layer ◽  
New Approach ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Interfaces ◽  
Different Thickness

Organic light emitting diode is a Solid state lighting devices, the charge transporters must be infused from the anode and cathode yet the execution, lifetime, effectiveness and solidness of these devices are normally administered by the correct thickness of the material layers and terminal/organic interfaces at the anode contacts. In this paper we exhibit a new approach using different thickness of organic material of emissive layer and hole injection layer in OLED. We could enhance the effectiveness of doping materials by framing exciplex improved OLED devices and concentrate their execution enhancement by utilizing different thickness. In this work different thickness of emission layer, ETL layer and HIL is taken and maximum luminous efficiency of different devices were observed

Sign in / Sign up

Export Citation Format

Share Document