Evolution of Order in Soft Materials under Nanoscale Confinement: Structure and Bonding

Soft materials can be confined either at interfaces or as films. In either case, internal forces are developed that, due to the softness of the materials, can cause large scale changes in bonding and structure, at microscopic and/or mesoscopic length scales, which in turn give rise to properties drastically different from bulk matter. Here we focus on the evolution of spontaneous order in simple and complex fluids under one-dimensional geometrical confinement as obtains in ultrathin films and at liquid-solid interfaces. We present a very brief review of research on the structural characteristics of such ordering and the changes in molecular bonding that cause these structural changes. We also discuss some effects of this ordering on some transport properties.

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Numerical Analysis of Soil Settlement Prediction and Its Application In Large-Scale Marine Reclamation Artificial Island Project

Polish Maritime Research ◽

10.1515/pomr-2017-0097 ◽

2017 ◽

Vol 24 (s3) ◽

pp. 4-11 ◽

Cited By ~ 1

Author(s):

Jie Zhao ◽

Lingyun Bao ◽

Guixuan Wang

Keyword(s):

Numerical Calculation ◽

Numerical Analysis ◽

Large Scale ◽

Structural Characteristics ◽

Silty Clay ◽

Two Dimensional ◽

Analysis Method ◽

One Dimensional ◽

Soil Settlement ◽

Numerical Calculation Method

Abstract In an artificial island construction project based on the large-scale marine reclamation land, the soil settlement is a key to affect the late safe operation of the whole field. To analyze the factors of the soil settlement in a marine reclamation project, the SEM method in the soil micro-structural analysis method is used to test and study six soil samples such as the representative silt, mucky silty clay, silty clay and clay in the area. The structural characteristics that affect the soil settlement are obtained by observing the SEM charts at different depths. By combining numerical calculation method of Terzaghi’s one-dimensional and Biot’s two-dimensional consolidation theory, the one-dimensional and two-dimensional creep models are established and the numerical calculation results of two consolidation theories are compared in order to predict the maximum settlement of the soils 100 years after completion. The analysis results indicate that the micro-structural characteristics are the essential factor to affect the settlement in this area. Based on numerical analysis of one-dimensional and two-dimensional settlement, the settlement law and trend obtained by two numerical analysis method is similar. The analysis of this paper can provide reference and guidance to the project related to the marine reclamation land.

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1953 Amnesty According to GULAG Statistics: Its Structure and Dynamics

Историческая информатика ◽

10.7256/2585-7797.2021.1.34901 ◽

2021 ◽

pp. 1-10

Author(s):

Ekaterina Evgenevna Vorobeva

Keyword(s):

Large Scale ◽

Structural Changes ◽

Turning Point ◽

Structural Characteristics ◽

Scale Problem ◽

Release Process ◽

Structure And Dynamics ◽

History Of ◽

Entire History ◽

Camp System

The article studies the dynamics of 1953 amnesty and analyzes its structural characteristics. The 1953 amnesty was the largest in the entire history of the Soviet penitentiary system. Therefore, it is of particular interest to know the stages of the prisoners’ release process and the way such a large-scale problem could be solved. The author focuses on the structure of prisoners to be released as well as the structural changes of prisoners caused by the amnesty and their impact on the system as a whole. Despite a large number of domestic and foreign studies addressing the GULAG, the process of amnesty implementation has not been studied as it is yet. The author traces the implementation of the USSR Supreme Soviet Presidium Decree dated 03.27.1953 "On amnesty." The methodological basis for the study is statistical analysis of data on the implementation of the release plan. The result of the study is the conclusion that the 1953 amnesty was a turning point in the functioning of the USSR camp system. However, its process was uneven and accompanied by a number of difficulties caused by the need to carry out serious control and accounting work and involve additional sources to make decisions on the release of individual prisoners.

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Do Lower Foreign Flows and Higher Domestic Flows Reduce Indian Equity Market Volatility?

Vision The Journal of Business Perspective ◽

10.1177/0972262921990981 ◽

2021 ◽

pp. 097226292199098

Author(s):

Vaibhav Aggarwal ◽

Adesh Doifode ◽

Mrityunjay Kumar Tiwary

Keyword(s):

Stock Market ◽

Mutual Fund ◽

Stock Markets ◽

Large Scale ◽

Structural Changes ◽

Market Volatility ◽

Stock Market Volatility ◽

Equity Investments ◽

Net Equity ◽

Indian Stock Market

This study examines the relationship that both domestic and foreign institutional net equity flows have with the India stock markets. The motivation behind is the study to examine whether increased net equity investments from domestic institutional investors has reduced the influence of foreign equity flows on the Indian stock market volatility. Our results indicate that only during periods in which domestic equity inflows surpass foreign flows by a significant margin, as seen during 2015–2018, is the Indian stock market volatility not significantly influenced by foreign equity investments. However, during periods of re-emergence of strong foreign net inflows, the Indian market volatility is still being impacted significantly, as has been observed since 2019. Furthermore, we find that both large-scale net buying and net selling by domestic funds increased the stock market volatility as observed during 2015–2018 and COVID-impacted year 2020 respectively. The implications of this study are multi-fold. First, the regulators should discuss with industry bodies before enforcing major structural changes like reconstituting of mutual fund investment mandate in 2017 which forced domestic funds to quickly change portfolio allocation amongst large-cap, mid-cap and small-cap stocks resulting in higher stock market volatility. Second, adequate investor educational and awareness programmes need to be conducted regularly for retail investors to minimize herd behaviour of investing during market rise and heavy redemptions at times of fall. Third, the economic policies should be stable and forward-looking to ensure foreign investors remain attracted to the Indian stock markets at all times.

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Structural Changes in Thalamic Nuclei Across Prodromal and Clinical Alzheimer’s Disease

Journal of Alzheimer s Disease ◽

10.3233/jad-201583 ◽

2021 ◽

pp. 1-11

Author(s):

Adam S. Bernstein ◽

Steven Z. Rapcsak ◽

Michael Hornberger ◽

Manojkumar Saranathan ◽

Keyword(s):

Alzheimer’S Disease ◽

Alzheimer's Disease ◽

Large Scale ◽

Structural Changes ◽

Thalamic Nuclei ◽

Medial Temporal Lobes ◽

Cognitive Changes ◽

Temporal Lobes ◽

Medial Geniculate ◽

Healthy Control

Background: Increasing evidence suggests that thalamic nuclei may atrophy in Alzheimer’s disease (AD). We hypothesized that there will be significant atrophy of limbic thalamic nuclei associated with declining memory and cognition across the AD continuum. Objective: The objective of this work was to characterize volume differences in thalamic nuclei in subjects with early and late mild cognitive impairment (MCI) as well as AD when compared to healthy control (HC) subjects using a novel MRI-based thalamic segmentation technique (THOMAS). Methods: MPRAGE data from the ADNI database were used in this study (n = 540). Healthy control (n = 125), early MCI (n = 212), late MCI (n = 114), and AD subjects (n = 89) were selected, and their MRI data were parcellated to determine the volumes of 11 thalamic nuclei for each subject. Volumes across the different clinical subgroups were compared using ANCOVA. Results: There were significant differences in thalamic nuclei volumes between HC, late MCI, and AD subjects. The anteroventral, mediodorsal, pulvinar, medial geniculate, and centromedian nuclei were significantly smaller in subjects with late MCI and AD when compared to HC subjects. Furthermore, the mediodorsal, pulvinar, and medial geniculate nuclei were significantly smaller in early MCI when compared to HC subjects. Conclusion: This work highlights nucleus specific atrophy within the thalamus in subjects with early and late MCI and AD. This is consistent with the hypothesis that memory and cognitive changes in AD are mediated by damage to a large-scale integrated neural network that extends beyond the medial temporal lobes.

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Fabrication of Ultrathin MoS2 Nanosheets and Application on Adsorption of Organic Pollutants and Heavy Metals

Processes ◽

10.3390/pr8050504 ◽

2020 ◽

Vol 8 (5) ◽

pp. 504 ◽

Cited By ~ 1

Author(s):

Siyi Huang ◽

Ziyun You ◽

Yanting Jiang ◽

Fuxiang Zhang ◽

Kaiyang Liu ◽

...

Keyword(s):

Heavy Metals ◽

Electrostatic Interactions ◽

Large Scale ◽

Layer Structure ◽

Structural Characteristics ◽

Hexagonal Phase ◽

Two Dimensional ◽

Mos2 Nanosheets ◽

Hybrid Strategy ◽

Ultrathin Mos2 Nanosheets

Owing to their peculiar structural characteristics and potential applications in various fields, the ultrathin MoS2 nanosheets, a typical two-dimensional material, have attracted numerous attentions. In this paper, a hybrid strategy with combination of quenching process and liquid-based exfoliation was employed to fabricate the ultrathin MoS2 nanosheets (MoS2 NS). The obtained MoS2 NS still maintained hexagonal phase (2H-MoS2) and exhibited evident thin layer-structure (1–2 layers) with inconspicuous wrinkle. Besides, the MoS2 NS dispersion showed excellent stability (over 60 days) and high concentration (0.65 ± 0.04 mg mL−1). The MoS2 NS dispersion also displayed evident optical properties, with two characteristic peaks at 615 and 670 nm, and could be quantitatively analyzed with the absorbance at 615 nm in the range of 0.01–0.5 mg mL−1. The adsorption experiments showed that the as-prepared MoS2 NS also exhibited remarkable adsorption performance on the dyes (344.8 and 123.5 mg g−1 of qm for methylene blue and methyl orange, respectively) and heavy metals (185.2, 169.5, and 70.4 mg g−1 of qm for Cd2+, Cu2+, and Ag+). During the adsorption, the main adsorption mechanisms involved the synergism of physical hole-filling effects and electrostatic interactions. This work provided an effective way for the large-scale fabrication of the two-dimensional nanosheets of transition metal dichalcogenides (TMDs) by liquid exfoliation.

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Metastable Intermediates as Stepping Stones on the Maturation Pathways of Viral Capsids

mBio ◽

10.1128/mbio.02067-14 ◽

2014 ◽

Vol 5 (6) ◽

Cited By ~ 10

Author(s):

Giovanni Cardone ◽

Robert L. Duda ◽

Naiqian Cheng ◽

Lili You ◽

James F. Conway ◽

...

Keyword(s):

Conformational Changes ◽

Large Scale ◽

Structural Changes ◽

Energy Landscape ◽

Potential Hazard ◽

Stepping Stones ◽

Scanning Calorimetry ◽

Conformational Effects ◽

Capsid Maturation ◽

Capsid Integrity

ABSTRACT As they mature, many capsids undergo massive conformational changes that transform their stability, reactivity, and capacity for DNA. In some cases, maturation proceeds via one or more intermediate states. These structures represent local minima in a rich energy landscape that combines contributions from subunit folding, association of subunits into capsomers, and intercapsomer interactions. We have used scanning calorimetry and cryo-electron microscopy to explore the range of capsid conformations accessible to bacteriophage HK97. To separate conformational effects from those associated with covalent cross-linking (a stabilization mechanism of HK97), a cross-link-incompetent mutant was used. The mature capsid Head I undergoes an endothermic phase transition at 60°C in which it shrinks by 7%, primarily through changes in its hexamer conformation. The transition is reversible, with a half-life of ~3 min; however, >50% of reverted capsids are severely distorted or ruptured. This observation implies that such damage is a potential hazard of large-scale structural changes such as those involved in maturation. Assuming that the risk is lower for smaller changes, this suggests a rationalization for the existence of metastable intermediates: that they serve as stepping stones that preserve capsid integrity as it switches between the radically different conformations of its precursor and mature states. IMPORTANCE Large-scale conformational changes are widespread in virus maturation and infection processes. These changes are accompanied by the release of conformational free energy as the virion (or fusogenic glycoprotein) switches from a precursor state to its mature state. Each state corresponds to a local minimum in an energy landscape. The conformational changes in capsid maturation are so radical that the question arises of how maturing capsids avoid being torn apart. Offering proof of principle, severe damage is inflicted when a bacteriophage HK97 capsid reverts from the (nonphysiological) state that it enters when heated past 60°C. We suggest that capsid proteins have been selected in part by the criterion of being able to avoid sustaining collateral damage as they mature. One way of achieving this—as with the HK97 capsid—involves breaking the overall transition down into several smaller steps in which the risk of damage is reduced.

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Large-Scale Structural Changes in the Sarcoplasmic Reticulum ATP-ASE are Essential for Calcium Active Transport

Synchrotron Radiation in Structural Biology ◽

10.1007/978-1-4684-8041-2_11 ◽

1989 ◽

pp. 77-82

Author(s):

J. K. Blasie ◽

D. Pascolini ◽

F. Asturias ◽

L. G. Herbette ◽

D. Pierce ◽

...

Keyword(s):

Sarcoplasmic Reticulum ◽

Active Transport ◽

Large Scale ◽

Structural Changes

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Study of Properties of Expanded Graphite – Polymer Porous Composite by Acoustic Emission Method

Archives of Metallurgy and Materials ◽

10.2478/amm-2013-0169 ◽

2013 ◽

Vol 58 (4) ◽

pp. 1331-1336 ◽

Cited By ~ 1

Author(s):

J. Berdowski ◽

S. Berdowska ◽

F. Aubry

Keyword(s):

Acoustic Emission ◽

Structural Changes ◽

Structural Characteristics ◽

Physical And Mechanical Properties ◽

Expanded Graphite ◽

Composite Membranes ◽

Acoustic Emission Method ◽

Emission Method ◽

Graphite Composite ◽

Wide Range

Abstract The purpose of this paper was to investigate the physical and mechanical properties of compressed expanded graphite (CEG) and their porous derivatives after impregnation, polymerization; and carbonization by the use of acoustic emission method (AE). The mechanical and structural characteristics of compressed expanded graphite and their three groups of porous composites after each technological process are presented and discussed. The measurements of acoustic emission parameters in these materials were carried out at wide range of frequency of the waves (0.1÷2.5 MHz). The changes of two of parameters: - AE pulses counts rate and spectrum distribution of AE waves - are presented in this paper. The analysis of the respective parameters AE also gives possibility to determine the micro- and macro structural changes of materials at different levels of technological processes. Applications of these materials as catalysts with high specific surface make them very interesting subject of study. Also compressed expanded graphite composite membranes prepared from furfuryl alcohol polymers are promising for gas separation.

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The structure and changes of China’s land system

China Agricultural Economic Review ◽

10.1108/caer-05-2018-0102 ◽

2019 ◽

Vol 11 (3) ◽

pp. 471-488 ◽

Cited By ~ 3

Author(s):

Liu Shouying

Keyword(s):

Economic Growth ◽

Institutional Change ◽

Structural Changes ◽

Structural Characteristics ◽

Institutional Arrangements ◽

Reform Process ◽

Content Type ◽

The Past ◽

Land System ◽

Rapid Economic Growth

Purpose The purpose of this paper is to analyze the structure and changes of China’s land system. To achieve this aim, the paper is divided into four parts. The first part gives a brief introduction to the structural characteristics of the Chinese land institutional arrangements; the second part analyzes the reform process of the land system in the past 40 years and its path of change; the third part engages the discussion about the historic contribution made by the land institutional change to rapid economic growth and structural changes; and the final part is conclusion and some policy implications. Design/methodology/approach After 40 years of reforms and opening up, China has not only created a growth miracle unparalleled for any major country in human history, but also transformed itself from a rural to an urban society. Behind this great transformation is a systemic reform in land institutions. Rural land institutions went from collectively owned to household responsibility system, thereby protecting farmers’ land rights. This process resulted in long-term sustainable growth in China’s agriculture, a massive rural-urban migration and a historical agricultural transformation. The conversion of agricultural land to non-agricultural uses and the introduction of market mechanisms made land a policy tool in driving high economic growth, industrialization and urbanization. Findings Research shows that the role of land and its relationship with the economy will inevitably change as China’s economy enters a new stage of medium-to-high speed growth. With economic restructuring, low-cost industrial land will be less effective. Urbanization is also shifting from rapid expansion to endogenous growth so that returns on land capitalization will decrease and risks will increase. Therefore, China must abandon land-dependent growth model through deepening land reforms and adapt a new pattern of economic development. Originality/value This paper gives a brief introduction to the structural characteristics of the Chinese land institutional arrangements, analyzes the reform process of the land system in the past 40 years and its path of change, and evaluates the historic contribution made by the land institutional change to rapid economic growth and structural changes.

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