scholarly journals Albumin protein coronas render nanoparticles surface active: consonant interactions at air–water and at lipid monolayer interfaces

2021 ◽  
Author(s):  
Nasim Ganji ◽  
Geoffrey D. Bothun
Keyword(s):  
Adsorption Kinetics ◽  
Driving Force ◽  
A Priori ◽  
Protein Corona ◽  
Lipid Monolayer ◽  
Surface Active ◽  
Biological Interfaces

Albumin restructuring yields an additional driving force for protein corona-modified nanoparticles to adhere to biological interfaces that can be revealed a priori by modeling adsorption kinetics.

scholarly journals Using corncob-based biochar to intercept BTEX in stormwater filtration systems

2020 ◽  
Vol 82 (9) ◽  
pp. 1858-1867
Author(s):  
Huannan Wang ◽  
Dandan Yan ◽  
Huan Zeng ◽  
Jiajie He
Keyword(s):  
Adsorption Kinetics ◽  
Driving Force ◽  
Contact Time ◽  
Adsorption Kinetic ◽  
Batch Experiments ◽  
Kinetic Experiment ◽  
Transport Experiment ◽  
Endothermic Process ◽  
Kinetics Of ◽  
Adsorption Capability

Abstract A biochar material made from corncobs was tested for its capability in BTEX adsorption/interception in stormwater filtration systems. Batch experiments were conducted to examine the adsorption kinetics, adsorption isotherms, and adsorption thermodynamics of BTEX onto this biochar. The feasibility of applying this biochar in stormwater filtration was studied by dynamic transport experiments and model simulations. The result showed that this biochar can adsorb BTEX and the adsorption is a thermodynamically spontaneous, and endothermic process. The BTEX adsorption kinetic experiment and adsorption retarded BTEX transport experiment indicated that the BTEX adsorption kinetics can be changed by the driving force between the BTEX concentrations and the active adsorption site as well as the contact time between BTEX and the biochar. In terms of applying this biochar in stormwater filtration, the Monte Carlo uncertainty analysis indicated that the BTEX interception is sensitive to the hydraulic conductivity of the biochar filter and the adsorption kinetics of the biochar material. Although this corncob-made biochar demonstrated effective pollutant adsorption capability, the biochar adsorption capability should be utilized to retain the pollutant long enough for biodegradation to take effect for ultimate pollutant attenuation.

GENERALIZATION OF BARENBLATT'S COHESIVE FRACTURE THEORY FOR FRACTAL CRACKS

Fractals ◽  
2002 ◽  
Vol 10 (02) ◽  
pp. 189-198 ◽  
Author(s):  
ARASH YAVARI
Keyword(s):  
Driving Force ◽  
A Priori ◽  
Stress Singularity ◽  
Local Theory ◽  
Fractal Surface ◽  
Cohesive Fracture ◽  
Fracture Theory ◽  
Griffith’S Theory ◽  
Fractal Crack ◽  
Fractal Cracks

In this paper, we generalize Barenblatt's cohesive fracture theory for fractal cracks. We discuss the difficulties of generalizing the concept of traction on a fractal surface. Borodich's modification of Griffith's theory for fractal cracks is reviewed. Irwin's driving force is generalized for fractal cracks and a fractal driving force (Gf) is defined. It is shown that to generalize Barenblatt's theory for fractal cracks it is necessary to introduce a new quantity, D-fractal cohesive pseudo-stress. This new quantity is cohesive force per unit of a fractal measure. Fractal modulus of cohesion is seen to be a function of both the material and the fractal dimension of the crack. Equivalence of fractal Barenblatt's and Griffith's theories is discussed. It is seen that the order of stress singularity at the tip of a fractal crack cannot be obtained using modified Barenblatt's theory because this theory is a local theory and assumes the order of stress singularity a priori.

Adsorption kinetics of surface active agent at an interface

1972 ◽  
Vol 40 (1) ◽  
pp. 27-34 ◽  
Author(s):  
H Kimizuka ◽  
L.G Abood ◽  
T Tahara ◽  
K Kaibara
Keyword(s):  
Adsorption Kinetics ◽  
Surface Active Agent ◽  
Active Agent ◽  
Surface Active ◽  
Kinetics Of

scholarly journals Boulez – Xenakis: Two Converging Musical Heuristics

2021 ◽  
Vol 04 (05) ◽  
Author(s):  
Prof. Dr. Ricardo Mandolini ◽  
Keyword(s):  
Fixed Points ◽  
Driving Force ◽  
A Priori ◽  
Logical Truth ◽  
A Posteriori ◽  
The Creation ◽  
Mathematical Sciences

What is heuristics? The methods of imagination that prepares for invention and discovery, by accepting that all arguments are good if they can succeed in achieving the proposed goals. A principle is deemed to be heuristic, therefore, when it is considered not on the basis of the truth it supports but by the fact that it contributes wholly or partly to the realisation of some project. In order to compose a work, the creator has a certain number of dominant ideas, which function as pivots or fixed points around which the piece develops. The value of these ideas, which sometimes take the form of theories borrowed from the physical or mathematical sciences, is justified a posteriori, by the realisation of the works that emerge from them, and not a priori: the experimental or logical truth of what they assert, even if confirmed by experimental reality, is put here in brackets. These principles count as opinions for the composer; they are the heuristic principles of creation. The aim of this paper is to analyse the principles that operate as the driving force behind the creation of Boulez and Xenakis.

Application of cross correlation to HREM images of surfaces

1987 ◽  
Vol 45 ◽  
pp. 754-755
Author(s):  
D. E. Luzzi ◽  
L. D. Marks ◽  
M. I. Buckett
Keyword(s):  
Cross Correlation ◽  
A Priori ◽  
Matrix Material ◽  
Correlation Method ◽  
Accurate Knowledge ◽  
Complex Image ◽  
Fourier Filtering ◽  
The Matrix ◽  
Low Pass ◽  
Data Reduction Technique

As the HREM becomes increasingly used for the study of dynamic localized phenomena, the development of techniques to recover the desired information from a real image is important. Often, the important features are not strongly scattering in comparison to the matrix material in addition to being masked by statistical and amorphous noise. The desired information will usually involve the accurate knowledge of the position and intensity of the contrast. In order to decipher the desired information from a complex image, cross-correlation (xcf) techniques can be utilized. Unlike other image processing methods which rely on data massaging (e.g. high/low pass filtering or Fourier filtering), the cross-correlation method is a rigorous data reduction technique with no a priori assumptions.We have examined basic cross-correlation procedures using images of discrete gaussian peaks and have developed an iterative procedure to greatly enhance the capabilities of these techniques when the contrast from the peaks overlap.

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