scholarly journals Understanding gas capacity, guest selectivity, and diffusion in porous liquids

2017 ◽  
Vol 8 (4) ◽  
pp. 2640-2651 ◽  
Author(s):  
Rebecca L. Greenaway ◽  
Daniel Holden ◽  
Edward G. B. Eden ◽  
Andrew Stephenson ◽  
Chin W. Yong ◽  
...  
Keyword(s):  
Measurement Techniques ◽  
Molecular Simulations ◽  
Depth Study ◽  
Quantitative Understanding ◽  
Guest Selectivity ◽  
And Control ◽  
And Diffusion

An in-depth study of porous liquids using measurement techniques, molecular simulations, and control experiments to advance their quantitative understanding.

The Teaching of Measurement and Instrumentation for Industrial Needs

1969 ◽  
Vol 2 (10) ◽  
pp. 377-380
Keyword(s):  
Measurement Techniques ◽  
Important Thing ◽  
Industrial Needs ◽  
And Control ◽  
Measurement And Control ◽  
Modern Industry

Held in January, 1969, this symposium most aptly emphasised the necessity for the closest collaboration between the universities and industry at all levels for education in the inter-disciplinary subject of measurement and control. The important thing is that control cannot be accomplished in reality without the basis of a sound knowledge of the science of measurement. Furthermore educational outlook must be focused on the immense possibilities that exist in research in measurement techniques and also in the development of the refinements that are demanded by the requirements of modern industry. The papers which follow present, except for the first which ended the presentation of ‘Industrial Requirements’, the ‘Academic Viewpoint’

scholarly journals Probing the Interactions of Porphyrins with Macromolecules Using NMR Spectroscopy Techniques

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1942
Author(s):  
Ilche Gjuroski ◽  
Julien Furrer ◽  
Martina Vermathen
Keyword(s):  
Nmr Spectroscopy ◽  
Photophysical Properties ◽  
Optical Methods ◽  
Spectroscopic Techniques ◽  
Control Mechanisms ◽  
Dynamic Information ◽  
Non Covalent Interactions ◽  
And Control ◽  
And Diffusion ◽  
Covalent Interactions

Porphyrinic compounds are widespread in nature and play key roles in biological processes such as oxygen transport in blood, enzymatic redox reactions or photosynthesis. In addition, both naturally derived as well as synthetic porphyrinic compounds are extensively explored for biomedical and technical applications such as photodynamic therapy (PDT) or photovoltaic systems, respectively. Their unique electronic structures and photophysical properties make this class of compounds so interesting for the multiple functions encountered. It is therefore not surprising that optical methods are typically the prevalent analytical tool applied in characterization and processes involving porphyrinic compounds. However, a wealth of complementary information can be obtained from NMR spectroscopic techniques. Based on the advantage of providing structural and dynamic information with atomic resolution simultaneously, NMR spectroscopy is a powerful method for studying molecular interactions between porphyrinic compounds and macromolecules. Such interactions are of special interest in medical applications of porphyrinic photosensitizers that are mostly combined with macromolecular carrier systems. The macromolecular surrounding typically stabilizes the encapsulated drug and may also modify its physical properties. Moreover, the interaction with macromolecular physiological components needs to be explored to understand and control mechanisms of action and therapeutic efficacy. This review focuses on such non-covalent interactions of porphyrinic drugs with synthetic polymers as well as with biomolecules such as phospholipids or proteins. A brief introduction into various NMR spectroscopic techniques is given including chemical shift perturbation methods, NOE enhancement spectroscopy, relaxation time measurements and diffusion-ordered spectroscopy. How these NMR tools are used to address porphyrin–macromolecule interactions with respect to their function in biomedical applications is the central point of the current review.

Population Health and Social Governance: A Review, an Update, Some Clarifications, and a Response

2018 ◽  
Vol 29 (5) ◽  
pp. 731-738 ◽  
Author(s):  
Patrick O’Byrne
Keyword(s):  
Critical Theory ◽  
Population Health ◽  
Health Research ◽  
Theory And Practice ◽  
Research Approach ◽  
Qualitative Health Research ◽  
Social Governance ◽  
Depth Study ◽  
And Control

Critical theory is a paradigm that promotes viewpoints that are alternative and, at times, contrary to mainstream beliefs and dictates. In 2012, I adopted this perspective to review the role of ethnography and surmised that the data which arise from this research approach, which I described as an in-depth study of cultures, can be used to discipline and control these groups. In this edition of Qualitative Health Research, another author has critiqued this position. In this article, I review this critique, reiterate my position, update the data I used for my 2012 article, and highlight how I navigate what I feel is a tension between critical theory and practice.

Molecular simulations of analyte partitioning and diffusion in liquid crystal sensors

2020 ◽  
Vol 5 (1) ◽  
pp. 304-316 ◽  
Author(s):  
Jonathan K. Sheavly ◽  
Jake I. Gold ◽  
Manos Mavrikakis ◽  
Reid C. Van Lehn
Keyword(s):  
Molecular Dynamics ◽  
Liquid Crystal ◽  
Molecular Dynamics Simulations ◽  
Molecular Simulations ◽  
Activation Time ◽  
Dynamics Simulations ◽  
And Diffusion ◽  
Analyte Transport

Molecular dynamics simulations predict the effect of analyte transport on the activation time of chemoresponsive liquid crystal sensors to improve sensor selectivity.

scholarly journals Adsorption and Diffusion of C1 to C4 Alkanes in Dual-Porosity Zeolites by Molecular Simulations

Langmuir ◽  
2017 ◽  
Vol 33 (42) ◽  
pp. 11126-11137 ◽  
Author(s):  
Eliška Rezlerová ◽  
Arnošt Zukal ◽  
Jiří Čejka ◽  
Flor R. Siperstein ◽  
John K. Brennan ◽  
...  
Keyword(s):  
Molecular Simulations ◽  
Dual Porosity ◽  
And Diffusion

Degradation Behaviors of Biodegradable Aliphatic Polyesters and Polycarbonates

2020 ◽  
Vol 14 (2) ◽  
pp. 155-168 ◽  
Author(s):  
Yonghang Xu ◽  
Fangya Zhou ◽  
Danmin Zhou ◽  
Jintang Mo ◽  
Huawen Hu ◽  
...  
Keyword(s):  
Biodegradable Polymers ◽  
Degradation Mechanism ◽  
Polymeric Materials ◽  
Degradation Process ◽  
Biodegradable Plastics ◽  
Research Progress ◽  
Aliphatic Polyesters ◽  
Depth Study ◽  
Degradation Behaviors ◽  
And Control

Aliphatic polyesters and polycarbonates such as polylactide (PLA), polycaprolactone (PCL) and poly(propylene carbonate) (PPC), are well known as biodegradable, biocompatible and environmental-friendly polymeric materials, which have been widely used in various areas ranging from packaging to biomedical materials. The production and usage of biodegradable plastics can greatly alleviate the safety and environmental concerns because of the fairly short degradation periods and low toxicity of catabolite. During the degradation process of polymers, obvious changes appear in polymer structures and the physiochemical properties. Therefore, it is necessary to regulate and control the degradation behaviors and periods of biodegradable plastics such as polyesters and polycarbonates, which is significant for their more widespread popularization and applications. In this context, it is highly desirable to make a review contribution in this field so as to better understand the recent research progress on polymer degradation behaviors and kinetics, as well as the future prospect of biodegradable polymers. Herein, this paper reviews the research progress on the degradation behaviors of biodegradable polyesters and polycarbonates materials including PLA, PCL and PPC. Through an in-depth study of various internal/external factors, the degradation mechanism of these polymers is unraveled, which will motivate future studies into the synthesis of novel biodegradable polymers and the understanding of their degradation behavior on the molecular level.

Expiratory flow pattern and respiratory mechanics

1987 ◽  
Vol 65 (6) ◽  
pp. 1142-1145 ◽  
Author(s):  
Jacopo P. Mortola ◽  
Anne Marie Lauzon ◽  
Brian Mott
Keyword(s):  
Flow Pattern ◽  
Respiratory System ◽  
Airway Pressure ◽  
Work Of Breathing ◽  
Vocal Folds ◽  
Resistive Load ◽  
Adult Rats ◽  
Expiratory Flow ◽  
And Control ◽  
And Diffusion

During resting breathing, expiration is characterized by the narrowing of the vocal folds which, by increasing the expiratory resistance, raises mean lung volume and airway pressure. This is even more pronounced in the neonatal period, during which expirations with short complete airway closure are commonly occurring. We asked to which extent differences in expiratory flow pattern may modify the inspiratory impedance of the respiratory system. To this aim, newborn puppies, piglets, and adult rats were anesthetized, paralyzed, and ventilated with different expiratory patterns, (a) no expiratory load, (b) expiratory resistive load, and (c) end-inspiratory pause. The stroke volume of the ventilator and inspiratory and expiratory times were maintained constant, and the loads were adjusted in such a way that inflation always started from the resting volume of the respiratory system. After 1 min of each ventilatory pattern, mean inspiratory impedance and compliance of lung and respiratory system were measured. The values were unchanged or minimally altered by changing the type of ventilation. We conclude that the expiratory laryngeal loading is not primarily aimed to decrease the work of breathing. It is conceivable that the expiratory pattern is oriented to increase and control mean airway pressure in the regulation of pulmonary fluid reabsorption, distribution of ventilation, and diffusion of gases.

Microstructure–texture relationships of aerated sugar gels: Novel measurement techniques for analysis and control

2013 ◽  
Vol 18 ◽  
pp. 202-211 ◽  
Author(s):  
Els Herremans ◽  
Evi Bongaers ◽  
Pascal Estrade ◽  
Ewa Gondek ◽  
Maarten Hertog ◽  
...  
Keyword(s):  
Measurement Techniques ◽  
And Control
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