scholarly journals Reversible reduction drives anion ejection and C60 binding within an FeII4L6 cage

2020 ◽  
Vol 11 (4) ◽  
pp. 1097-1101 ◽  
Author(s):  
Zhenpin Lu ◽  
Tanya K. Ronson ◽  
Jonathan R. Nitschke
Keyword(s):  
Reduced Form ◽  
Reduction And Oxidation ◽  
Reversible Reduction ◽  
Uptake And Release

FeII4L6 cage 1 binds anionic guests but not neutral guests. In its reduced form, the cage can bind neutral C60. Reduction and oxidation of the cage could thus be used as a stimulus to control the uptake and release of both neutral and charged guests.

Heterogeneous Physico-Chemical Interactions Following Electrode Reaction: Interaction of Folates with Thiols

1997 ◽  
Vol 62 (2) ◽  
pp. 172-184 ◽  
Author(s):  
Michael Heyrovský ◽  
Barbora Prokopová
Keyword(s):  
Folic Acid ◽  
Electrode Reaction ◽  
Simplified Model ◽  
Reduced Form ◽  
Oxidation Peak ◽  
Free Enthalpy ◽  
Living Matter ◽  
Microheterogeneous Structure ◽  
Physico Chemical ◽  
Reversible Reduction

Folates do not react chemically with thiols in solution, however, they cause shifts of voltammetric reversible reduction peaks of disulfides towards positive potentials. This is explained as due to the formation of adducts between folates and thiols at the electrode surface. Analogous shifts, but towards negative potentials, were observed with the voltammetric reversible oxidation peak of a reduced form of folic acid after addition of thiols, and were ascribed to the same cause. According to this interpretation the shifts would provide a measure of free enthalpy of the weak interaction between the two partners and the electrode. It is suggested that the observed effect could serve as a simplified model of processes which occur between folates and proteins in the microheterogeneous structure of the living matter.

Dynamic mechanoelectrochemistry of polypyrrole membranes via shear-force tracking

2016 ◽  
Vol 18 (26) ◽  
pp. 17366-17372 ◽  
Author(s):  
Robert G. Northcutt ◽  
Christian Heinemann ◽  
Vishnu Baba Sundaresan
Keyword(s):  
Plastic Deformation ◽  
Shear Force ◽  
Oxidation Processes ◽  
Force Tracking ◽  
Reduction And Oxidation ◽  
Elastic And Plastic Deformation ◽  
Reversible Reduction

Mechanoelectrochemistry is the study of elastic and plastic deformation of materials during reversible reduction and oxidation processes.

Effects of Halothane on Platelet Function

1980 ◽  
Vol 44 (03) ◽  
pp. 143-145 ◽  
Author(s):  
J Dalsgaard-Nielsen ◽  
J Gormsen
Keyword(s):  
Platelet Aggregation ◽  
Platelet Function ◽  
Platelet Rich Plasma ◽  
Human Platelets ◽  
Halothane Anaesthesia ◽  
Inhibition Of Platelet Aggregation ◽  
Transient Impairment ◽  
High Concentrations ◽  
Uptake And Release ◽  
Platelet Functions

SummaryHuman platelets in platelet rich plasma (PRP) incubated at 37° C with 0.3–2% halothane for 5–10 min lost the ability to aggregate with ADP, epinephrine and collagen.At the same time uptake and release of 14C-serotonin was inhibited. When halothane supply was removed, platelet functions rapidly returned to normal. However, after high concentrations of halothane, the inhibition of platelet aggregation was irreversible or only partially reversible.The results suggest that halothane anaesthesia produces a transient impairment of platelet function.

Aerodynamic Shape Influence and Optimum Thickness Distribution Analysis of Perceptive Wind Turbine Blade

2018 ◽  
Vol 7 (3) ◽  
pp. 1
Author(s):  
J. V. Muruga Lal Jeyan ◽  
Akhila Rupesh ◽  
Jency Lal
Keyword(s):  
Wind Energy ◽  
Wind Turbine ◽  
Thickness Distribution ◽  
Turbine Blades ◽  
Reduced Form ◽  
Load Factor ◽  
Strong Impact ◽  
Theory Approach ◽  
Distribution Analysis ◽  
Optimum Thickness

The aerodynamic module combines the three-dimensional nonlinear lifting surface theory approach, which provides the effective propagated incident velocity and angle of attack at the blade section separately, and a two-dimensional panel method for steady axisymmetric and non-symmetric flow has to be involved to obtain the 3D pressure and velocity distribution on the wind mill model blade. Wind mill and turbines have become an economically competitive form of efficiency and renewable work generation. In the abroad analytical studies, the wind turbine blades to be the target of technological improvements by the use of highly possible systematic , aerodynamic and design, material analysis, fabrication and testing. Wind energy is a peculiar form of reduced form of density source of power. To make wind power feasible, it is important to optimize the efficiency of converting wind energy into productivity source. Among the different aspects involved, rotor aerodynamics is a key determinant for achieving this goal. There is a tradeoff between thin airfoil and structural efficiency. Both of which have a strong impact on the cost of work generated. Hence the design and analysis process for optimum design requires determining the load factor, pressure and velocity impact and optimum thickness distribution by finding the effect of blade shape by varying thickness on the basis of both the aerodynamic output and the structural weight.

Type 2 diabetes mellitus in patients with acute ischemiс stroke is associated with a decrease in plasma glutathione levels

2020 ◽  
Vol 25 (5) ◽  
pp. 29-35
Author(s):  
M. Yu. Maksimova ◽  
A. V. Ivanov ◽  
K. A. Nikiforova ◽  
F. R. Ochtova ◽  
E. T. Suanova ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Redox Status ◽  
Reduced Form ◽  
Glutathione Level ◽  
Total Glutathione ◽  
Diabetes Mellitus Group ◽  
Reduced Forms

Ischemic stroke (IS) and type 2 diabetes mellitus are factors that affect the homeostasis of low-molecularweight aminothiols (cysteine, homocysteine, glutathione etc.). It has already been shown that IS in the acute period led to a decrease a level of reduced forms of aminothiols, but it is not clear whether type 2 diabetes mellitus has a noticeable effect there. Objective: to reveal the features of homeostasis of aminothiols in patients with type 2 diabetes mellitus in acute IS. Material and methods. The study involved 76 patients with primary middle cerebral artery IS in the first 10–24 hours after development of neurological symptoms. Group 1 included 15 patients with IS and type 2 diabetes mellitus, group 2 — 61 patients with IS and stress hyperglycemia. Their total plasma levels of cysteine, homocysteine, and glutathione, their reduced forms, and redox status were determined at admission (in the first 24 hours after IS). Results. There was a decrease in the level of total glutathione level (1.27 vs. 1.65 μM, p = 0.021), as well as its reduced form (0.03 vs. 0.04 μM, p = 0.007) in patients with IS and type 2 diabetes mellitus. Patients with type 2 diabetes mellitus who had a low redox status of homocysteine (0.65–1.2%) and glutathione (0.7–2.0%) were also characterized by a decrease in total glutathione level (p = 0.02; p = 0.03). Conclusion. Thus, type 2 diabetes mellitus is associated with a decrease in the level of total glutathione in acute IS. Probably, type 2 diabetes mellitus is characterized by a particular relationship between the metabolism of homocysteine, glutathione and glucose. Therefore, the search for homocysteine-dependent approaches to correct glutathione metabolism in type 2 diabetes mellitus may be of interest as an adjuvant therapy for IS.

The Logical Square and the Table of Oppositions

2012 ◽  
Vol 15 (1) ◽  
pp. 400-416
Author(s):  
Wolfgang Kienzler
Keyword(s):  
Reduced Form ◽  
Square Of Opposition ◽  
Logical Square ◽  
Long Time ◽  
The Square Of Opposition ◽  
The Way

The way Frege presented the Square of Opposition in a reduced form in 1879 and 1910 can be used to develop two distinct versions of the square: The traditional square that displays inferences and a “Table of Oppositions” displaying variations of negation. This Table of Oppositions can be further simplified and thus be made more symmetrical. A brief survey of versions of the square from Aristotle to the present shows how both aspects of the square have coexisted for a very long time without ever being properly distinguished.

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