scholarly journals Structural and mineragenetic features of the Getkan area

2020 ◽  
Vol 192 ◽  
pp. 03015
Author(s):  
Yury Manilov
Keyword(s):  
Geophysical Methods ◽  
Structural Features ◽  
Comprehensive Analysis ◽  
Physical Characteristics ◽  
New Approaches ◽  
Different Types ◽  
Petrophysical Data ◽  
Different Characteristics ◽  
Physical Principles

Deep structural features of tectonic and mineragenetic zones of the region have been established based on the comprehensive analysis of geological, gravity, magnetic, and petrophysical data. Geophysical methods that are based on different physical principles have been shown to reflect different characteristics of lithosphere. Considering structural features and physical characteristics of mineragenetic objects, the obtained data allow genesis of endogenous mineralization of different types were identified and new approaches to the forecasting process was developed.

The deep structure of mineragenetic zones in Southern Primorye

2021 ◽  
pp. 23-38
Author(s):  
Ekaterina Ivolga ◽  
Yuri Manilov ◽  
Vitaly Kaplun
Keyword(s):  
Deep Structure ◽  
Geophysical Methods ◽  
Structural Features ◽  
Geophysical Data ◽  
Southern Primorye ◽  
Large Sets ◽  
Crucial Information ◽  
Integrated Interpretation ◽  
Geoelectric Data ◽  
Physical Principles

The deep structure of mineragenetic zones under the Spassk-Dalniy-Zerkalnaya Bay geotraverse has been derived from the integrated interpretation of seismic, density, magnetic, and geoelectric data. The studies demonstrate that geophysical methods based on different physical principles reflect various characteristics of lithosphere elements. Large sets of the obtained geophysical data provide crucial information on structural features and physical characteristics of mineragenetic objects to understand the genesis of endogenous mineralization of various types and develop new approaches to forecasting.

Study of the Molecular Architecture of Keratin Filaments by Electron Microscopy

1982 ◽  
Vol 40 ◽  
pp. 118-119
Author(s):  
U. Aebi ◽  
P. Rew ◽  
T.-T. Sun
Keyword(s):  
Electron Microscopy ◽  
Structural Organization ◽  
Cell Types ◽  
Structural Features ◽  
Molecular Architecture ◽  
The Past ◽  
Keratin Filaments ◽  
Different Types ◽  
10 Nm Filaments ◽  
Different Cell Types

Various types of intermediate-sized (10-nm) filaments have been found and described in many different cell types during the past few years. Despite the differences in the chemical composition among the different types of filaments, they all yield common structural features: they are usually up to several microns long and have a diameter of 7 to 10 nm; there is evidence that they are made of several 2 to 3.5 nm wide protofilaments which are helically wound around each other; the secondary structure of the polypeptides constituting the filaments is rich in ∞-helix. However a detailed description of their structural organization is lacking to date.

Comprehensive Effects of Short-Term Rental Platforms Across Hotel Types in U.S. and International Destinations

2021 ◽  
pp. 193896552110335
Author(s):  
John W. O’Neill ◽  
Jihwan Yeon
Keyword(s):  
Service Providers ◽  
Comprehensive Analysis ◽  
Competitive Market ◽  
Substitution Effects ◽  
Short Term ◽  
Hotel Performance ◽  
The World ◽  
Different Types ◽  
Location Type ◽  
The Impact

In recent years, short-term rental platforms in the lodging sector, including Airbnb, VRBO, and HomeAway, have received extensive attention and emerged as potentially alternative suppliers of services traditionally provided by established commercial accommodation providers, that is, hotels. Short-term rentals have dramatically increased the available supply of rooms for visitors to multiple international destinations, potentially siphoning demand away from hotels to short-term rental businesses. In a competitive market, an increase in supply with constant demand would negatively influence incumbent service providers. In this article, we examine the substitution effects of short-term rental supply on hotel performance in different cities around the world. Specifically, we comprehensively investigate the substitution effects of short-term rental supply on hotel performance based on hotel class, location type, and region. Furthermore, we segment the short-term rental supply based on its types of accommodations, that is, shared rooms, private rooms, and entire homes, and both examine and quantify the differential effects of these types of short-term rentals on different types of hotels. This study offers a comprehensive analysis regarding the impact of multiple short-term rental platforms on hotel performance and offers both conceptual and practical insights regarding the nature and extent of the effects that were identified.

scholarly journals Controlled growth of ultrafine metal nanoparticles mediated by solid supports

2021 ◽  
Vol 3 (7) ◽  
pp. 1865-1886
Author(s):  
Hongyin Hu ◽  
Shuanglong Lu ◽  
Ting Li ◽  
Yue Zhang ◽  
Chenxi Guo ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Catalytic Properties ◽  
Structural Features ◽  
Controlled Growth ◽  
Solid Supports ◽  
Ultrafine Metal ◽  
Different Types

This article reviews the controlled growth of UMNPs mediated by different types of solid supports and their catalytic properties. The importance of certain structural features of the supports is also discussed.

Radiation Curable Polysiloxane: Synthesis to Applications

Soft Matter ◽  
2021 ◽  
Author(s):  
Selvan T. Muthamil ◽  
Titash Mondal
Keyword(s):  
Structural Features ◽  
Superior Performance ◽  
Operational Conditions ◽  
Different Types

Among the different types of specialty polymers, polysiloxane finds its position in the pyramid's apex in performance attributes. Unique structural features result in superior performance benefits over wide operational conditions....

scholarly journals Cytotoxic Agents in the Minor Alkaloid Groups of the Amaryllidaceae

Planta Medica ◽  
2021 ◽  
Author(s):  
Jerald J. Nair ◽  
Johannes van Staden
Keyword(s):  
Cancer Cells ◽  
Cancer Cell Line ◽  
Structural Features ◽  
Biological Properties ◽  
Cytotoxic Agents ◽  
Plant Family ◽  
Structure Activity ◽  
Significant Interest ◽  
Different Types ◽  
Minor Alkaloid

AbstractOver 600 alkaloids have to date been identified in the plant family Amaryllidaceae. These have been arranged into as many as 15 different groups based on their characteristic structural features. The vast majority of studies on the biological properties of Amaryllidaceae alkaloids have probed their anticancer potential. While most efforts have focused on the major alkaloid groups, the volume and diversity afforded by the minor alkaloid groups have promoted their usefulness as targets for cancer cell line screening purposes. This survey is an in-depth review of such activities described for around 90 representatives from 10 minor alkaloid groups of the Amaryllidaceae. These have been evaluated against over 60 cell lines categorized into 18 different types of cancer. The montanine and cripowellin groups were identified as the most potent, with some in the latter demonstrating low nanomolar level antiproliferative activities. Despite their challenging molecular architectures, the minor alkaloid groups have allowed for facile adjustments to be made to their structures, thereby altering the size, geometry, and electronics of the targets available for structure-activity relationship studies. Nevertheless, it was seen with a regular frequency that the parent alkaloids were better cytotoxic agents than the corresponding semisynthetic derivatives. There has also been significant interest in how the minor alkaloid groups manifest their effects in cancer cells. Among the various targets and pathways in which they were seen to mediate, their ability to induce apoptosis in cancer cells is most appealing.

scholarly journals Astrometry of the solar system: the ground-based observations

2007 ◽  
Vol 3 (S248) ◽  
pp. 66-73
Author(s):  
J.-E. Arlot
Keyword(s):  
Solar System ◽  
Space Missions ◽  
Physical Characteristics ◽  
Physical Parameters ◽  
Dynamical Models ◽  
Long Period ◽  
Solar System Objects ◽  
Different Characteristics

AbstractThe main goal of the astrometry of solar system objects is to build dynamical models of their motions to understand their evolution, to determine physical parameters and to build accurate ephemerides for the preparation and the exploitation of space missions. For many objects, the ground-based observations are still very important because radar or observations from space probes are not available. More, the need of observations on a long period of time makes the ground-based observations necessary. The solar system objects have very different characteristics and the increase of the astrometric accuracy will depend on the objects and on their physical characteristics. The purpose of this communication is to show how to get the best astrometric accuracy.

scholarly journals It's Not Just Structural: Social Movements are not Homogenous Responses to Structural Features, but Networks shaped by Organisational Strategies and Status

2009 ◽  
Vol 14 (1) ◽  
pp. 26-41 ◽  
Author(s):  
Clare Saunders
Keyword(s):  
Structural Features ◽  
Political Opportunity ◽  
Opportunity Structures ◽  
Government Institutions ◽  
Political Opportunities ◽  
The Status ◽  
Political Opportunity Structures ◽  
The Uk ◽  
Different Characteristics ◽  
Environmental Organisation

Political opportunity structures are often used to explain differences in the characteristics of movements in different countries on the basis of the national polity in which they exist. However, the approach has a number of weaknesses that are outlined in this article. The article especially stresses the fact that such broad-brush approaches to political opportunity structures fail to account for the different characteristics of movement organisations within the same polity. The article therefore recommends using a more fine-tuned approach to political opportunities, taking into account that the strategies and status of organisations affect the real political opportunities they face. This fine-tuned approach is used to predict how the status and strategy of environmental organisations might influence the extent to which different types of environmental organisations in the UK network with one-another. We find that organisations that face an open polity - those with a moderate action repertoire and a constructive relationship with government institutions - tend not to cooperate with those with a radical action repertoire and negative relations with government institutions. On the other hand, those that vary their action repertoires, and which have variable status according to the issues involved or campaign targets, have a much broader range of network links with other types of organisations. Thus, there is much more diversity in types of environmental organisation in the UK than the broad-brush to political opportunity structures would account for. Nonetheless, it does seem that environmental organisations are aware of how their own behaviours might influence (non-structural) political opportunities, and that they mould their strategies and networking patterns around this awareness.

The Hertzian Spectrum of Rubber and Its Micellar Constitution

1946 ◽  
Vol 19 (4) ◽  
pp. 1085-1087
Author(s):  
Pierre Girard ◽  
Paul Abadie
Keyword(s):  
Dielectric Constant ◽  
Electric Field ◽  
Wave Length ◽  
Structural Features ◽  
Loss Angle ◽  
First Case ◽  
Dipolar Molecules ◽  
Alternating Electric Field ◽  
Different Types ◽  
Absorption And Dispersion

Abstract The spectra which were studied lie within the region of hertzian frequencies, and can be represented either by dispersion curves showing the dielectric constant of the substance as a function of the frequency (or wave length λ), or by absorption curves showing the loss angle as a function of this frequency. These two types of curves represent the same phenomenon, i.e., orientation of the dipolar molecules in the alternating electric field, in accordance with the theory of Debye. The spectra and their interpretation depend chiefly on whether the molecules are crystalloid with relatively small and similar dimensions, or are colloidal, with large and unequal dimensions. In the first case, the spectra gives evidence chiefly on the form of the molecules and their structural features. Dilution in a nonpolar solvent shows for certain dipolar compounds, e.g., alcohol, considerable deformations, which differ according to the solvent. In the case of colloids, e.g., rubber, which has a permanent moment, the spectra and the meaning of these spectra are far different. In this case the spectra indicate that the absorption and dispersion values in the hertzian region are closely related to the micellar constitution, i.e., to the different types of micelles, to their size, and to the proportion of each type.

scholarly journals Social Movement Structures in Relation to Goals and Forms of Action: An Exploratory Model

2012 ◽  
Vol 3 (2) ◽  
Author(s):  
Jurgen Willems ◽  
Marc Jegers
Keyword(s):  
Social Movements ◽  
Social Movement ◽  
Classification System ◽  
Structural Features ◽  
Classification Criteria ◽  
Mouvements Sociaux ◽  
Different Types ◽  
Nous Utilisons ◽  
Exploratory Model

ABSTRACT This article describes a theoretical taxonomy of the structural features of social movements. We begin by using two classification criteria to analyze the types of relations that characterize the structure of social movements. From there, we look at how differences in structure relate to different goals and forms of action. We then derive a four-fold classification system based on formalization and hierarchy of relationships. For each classification we provide case descriptions of social movements (or parts thereof) using literature on how different movement structures support different types of goals and forms of action. Furthermore, we discuss the dynamics of social movements (or parts thereof) and how their classification may evolve. By doing so, we illustrate how changes in structure, goals, and forms of action mutually influence each other. RÉSUMÉ Cet article dresse une taxonomie théorique des caractéristiques structurelles des mouvements sociaux. Nous utilisons d’abord deux critères de classification pour analyser les types de relation propres à la structure des mouvements sociaux. Par la suite, nous observons comment des différences de structure coïncident avec des buts et des formes d’action différents. Nous développons ensuite un système de classification quadruple fondé sur la formalisation et l’hiérarchisation des relations. Pour chacune des classifications, nous fournissons des descriptions de cas de mouvements sociaux (ou de parties de ceux-ci) en recourant à des écrits sur la manière dont des structures de mouvement différentes entraînent des buts et des formes d’action différents. En outre, nous discutons des dynamiques des mouvements sociaux (ou de parties de ceux-ci) et comment leur classification pourrait évoluer. Par ce moyen, nous illustrons comment des changements de structure, de but et de forme d’action s’influencent réciproquement.

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