scholarly journals Structure and Gas Diffusion Path Analysis of Hydrogenase Enzymes by Homology Modelling

2017 ◽  
pp. 277-293
Author(s):  
Nivedita Sahu ◽  
Anirudh Nelabhotla ◽  
Pradhan Nityananda
Keyword(s):  
Path Analysis ◽  
Homology Modelling ◽  
Diffusion Path ◽  
Gas Diffusion ◽  
Hydrogenase Enzymes

scholarly journals Development of CO2-Selective Polyimide-Based Gas Separation Membranes Using Crown Ether and Polydimethylsiloxane

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1927
Author(s):  
Dongyoung Kim ◽  
Iqubal Hossain ◽  
Asmaul Husna ◽  
Tae-Hyun Kim
Keyword(s):  
Crown Ether ◽  
Gas Separation ◽  
Structural Characteristics ◽  
Gel Permeation Chromatography ◽  
Diffusion Path ◽  
Gas Diffusion ◽  
Separation Performance ◽  
Structure Property ◽  
Scanning Calorimetry ◽  
Fine Grained

A series of CO2-selective polyimides (CE-PDMS-PI-x) was synthesized by copolymerizing crown ether diamine (trans-diamino-DB18C6) and PDMS-diamine with 4,4′-(hexafluoroisopropylidene) di-phthalic anhydride (6FDA) through the polycondensation reaction. The structural characteristics of the copolymers and corresponding membranes were characterized by nuclear magnetic resonance (NMR), infrared spectroscopy (ATR-FTIR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), and gel permeation chromatography (GPC). The effect of PDMS loading on the CE-PDMS-PI-x copolymers was further analyzed and a very good structure–property relationship was found. A well-distributed soft PDMS unit played a key role in the membrane’s morphology, in which improved CO2-separation performance was observed at a low PDMS content (5 wt %). In contrast, the fine-grained phase separation adversely affected the separation behavior at a certain level of PDMS loading, and the PDMS was found to provide a flexible gas-diffusion path, affecting only the permeability without changing the selective gas-separation performance for the copolymers with a PDMS content of 20% or above.

Sintering mechanisms of blended Ti6Al4V powder from diffusion path analysis

2013 ◽  
Vol 49 (3) ◽  
pp. 994-1008 ◽  
Author(s):  
Xiaoyan Xu ◽  
Guiru Liu Nash ◽  
Philip Nash
Keyword(s):  
Path Analysis ◽  
Diffusion Path ◽  
Sintering Mechanisms

Approach on Pollution Gases Diffusion Path of Small Spacing Tunnel Entrance Based on CFD

2014 ◽  
Vol 580-583 ◽  
pp. 1254-1257 ◽  
Author(s):  
Yan Ying Xing
Keyword(s):  
Ventilation System ◽  
Diffusion Path ◽  
Gas Diffusion ◽  
Paper Analysis ◽  
Thin Wall ◽  
Structure Form ◽  
Ansys Fluent ◽  
Secondary Pollution ◽  
Small Spacing ◽  
Tunnel Entrance

Small spacing tunnel due to the special structure form and two tubes are only separated by a thin wall. This structure form is likely to cause secondary pollution, pollution gas discharged into the adjacent tunnel. This phenomenon will lead to increased ventilation system energy consumption. This paper analysis gas diffusion path between two adjacent tunnels, using CFD (Ansys Fluent). To relieve the pollution gases secondary pollution of tunnel portal area, using CFD analyzed gas diffusion path under different circumstances, for opening hole on the top of sunshades, extended of the wall between two adjacent tunnels and other programs, and identify more comprehensive disposal program.

Knowledge diffusion path analysis of data quality literature: A main path analysis

2014 ◽  
Vol 8 (3) ◽  
pp. 594-605 ◽  
Author(s):  
Yu Xiao ◽  
Louis Y.Y. Lu ◽  
John S. Liu ◽  
Zhili Zhou
Keyword(s):  
Data Quality ◽  
Path Analysis ◽  
Knowledge Diffusion ◽  
Diffusion Path ◽  
Quality Literature ◽  
Main Path ◽  
Main Path Analysis

Decoration technique and surface physics

1978 ◽  
Vol 36 (1) ◽  
pp. 436-437 ◽  
Author(s):  
H. Bethge
Keyword(s):  
Diffusion Path ◽  
Special Importance ◽  
Surface Physics ◽  
Step Structure ◽  
Initial Stage ◽  
Special Cases ◽  
Atomic Surface ◽  
The Mean ◽  
Bulk Structure ◽  
Decoration Technique

Besides the atomic surface structure, diverging in special cases with respect to the bulk structure, the real structure of a surface Is determined by the step structure. Using the decoration technique /1/ it is possible to image step structures having step heights down to a single lattice plane distance electron-microscopically. For a number of problems the knowledge of the monatomic step structures is important, because numerous problems of surface physics are directly connected with processes taking place at these steps, e.g. crystal growth or evaporation, sorption and nucleatlon as initial stage of overgrowth of thin films.To demonstrate the decoration technique by means of evaporation of heavy metals Fig. 1 from our former investigations shows the monatomic step structure of an evaporated NaCI crystal. of special Importance Is the detection of the movement of steps during the growth or evaporation of a crystal. From the velocity of a step fundamental quantities for the molecular processes can be determined, e.g. the mean free diffusion path of molecules.

Compact and efficient gas diffusion electrodes based on nanoporous alumina membranes for microfuel cells and gas sensors

The Analyst ◽  
2020 ◽  
Vol 145 (1) ◽  
pp. 122-131 ◽  
Author(s):  
Wanda V. Fernandez ◽  
Rocío T. Tosello ◽  
José L. Fernández
Keyword(s):  
Response Times ◽  
Hydrogen Oxidation ◽  
Fast Response ◽  
Gas Diffusion ◽  
Limiting Current ◽  
Gas Diffusion Electrodes ◽  
Nanoporous Alumina ◽  
Alumina Membranes ◽  
Current Densities ◽  
Microfuel Cells

Gas diffusion electrodes based on nanoporous alumina membranes electrocatalyze hydrogen oxidation at high diffusion-limiting current densities with fast response times.

An Input–Process–Output Model of Pilot Core Competencies

2017 ◽  
Vol 7 (2) ◽  
pp. 78-85 ◽  
Author(s):  
Heikki Mansikka ◽  
Don Harris ◽  
Kai Virtanen
Keyword(s):  
Path Analysis ◽  
Team Performance ◽  
Core Competencies ◽  
Core Competency ◽  
Principal Component ◽  
Analysis Model ◽  
Input Process ◽  
The Core ◽  
Performance Framework ◽  
Process Output

Abstract. The aim of this study was to investigate the relationship between the flight-related core competencies for professional airline pilots and to structuralize them as components in a team performance framework. To achieve this, the core competency scores from a total of 2,560 OPC (Operator Proficiency Check) missions were analyzed. A principal component analysis (PCA) of pilots’ performance scores across the different competencies was conducted. Four principal components were extracted and a path analysis model was constructed on the basis of these factors. The path analysis utilizing the core competencies extracted adopted an input–process–output’ (IPO) model of team performance related directly to the activities on the flight deck. The results of the PCA and the path analysis strongly supported the proposed IPO model.

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