Concentration Space of Homogeneous Garnet in the System Ga2O3–(Y, Bi)3(Fe, Ga)5O12–Fe2O3

2018 ◽  
Vol 480 (1) ◽  
pp. 99-102 ◽  
Author(s):  
M. N. Smirnova ◽  
G. D. Nipan ◽  
G. E. Nikiforova
Keyword(s):  
Concentration Space

scholarly journals Centralidade dos serviços de saúde na zona leste de Teresina (PI): uma análise de sua produção espacial / Centrality of the health services in the East region of Teresina, PI: an analysis of its space production

2017 ◽  
Vol 27 (1) ◽  
pp. 29
Author(s):  
Paulo Henrique de Carvalho Bueno ◽  
Antônia Jesuíta de Lima
Keyword(s):  
Health Services ◽  
High Income ◽  
Historic Center ◽  
East Region ◽  
Getulio Vargas ◽  
Space Production ◽  
The City ◽  
Concentration Space

<p>Compreende-se a centralidade intraurbana como especializações funcionais de algumas frações espaciais da cidade que se singularizam a partir da concentração e geração de fluxos permanentes de pessoas e mercadorias. Nessa direção, a centralidade dos serviços de saúde de Teresina tem seu marco inicial com a instalação do Hospital Getúlio Vargas (1941) no centro histórico da cidade. Desde então, diversos hospitais, clínicas, laboratórios e atividades correlatas aí se instalaram, o que lhes configura como o espaço de maior concentração destes na cidade. Mas, a partir dos anos 2000 inicia-se um processo de descentralização dos serviços de saúde para outros espaços citadinos, notadamente para os bairros mais centrais da zona Leste. Nesse sentido, objetiva-se analisar a produção espacial da centralidade dos serviços de saúde na zona Leste de Teresina, pautado em depoimentos de profissionais e empreendedores dos bairros Fátima, Jóquei e São Cristóvão que lidam com os referidos serviços. Argumenta-se que a constituição dessa nova centralidade dos serviços de saúde de Teresina baseia-se na busca do segmento de renda alta da cidade, o qual exige serviços exclusivos e próximos aos seus locais de moradia ou de mais fácil acessibilidade quando comparados aos encontrados no centro principal.</p><p><strong>Palavras-chaves</strong>: Centralidade. Serviços de Saúde. Zona Leste de Teresina.</p><p><strong>Abstract</strong></p><p>The intraurban centrality is understood as the functional specializations of some space fractions of the city that singularize from the concentration of people and goods permanent flux generation. In this direction, the centrality of the health services of Teresina has its beginning with the installation of Getúlio Vargas Hospital (1941) in the historic center of the city. Since then, several hospitals, laboratories and related activities have been installed, which is configured as their greatest concentration space of this city. But, from 2000, a process of decentralization of health services has begun to other city places, mainly to the more central districts of the East region. This way, it is aimed to analyze the space production of the centrality of the health services in the least region of Teresina, based on the testimony of the professionals and entrepreneurs of the districts of Fátima, Jóquei and São Cristóvão that deal with such services. It argues that the constitution of this new centrality of health services in Teresina is based on the search for the high income population of the city, which demands exclusive services and near their living places or of easier accessibility when compared to the ones found in the main downtown. </p><p><strong>Keywords</strong>: Centrality. Health Services. East Region of Teresina.</p>

PERIOD-DOUBLING GEOMETRY OF THE BELOUSOV-ZHABOTINSKY REACTION DYNAMICS

1996 ◽  
Vol 06 (07) ◽  
pp. 1267-1279 ◽  
Author(s):  
JICHANG WANG ◽  
F. HYNNE ◽  
P. GRAAE SØRENSEN
Keyword(s):  
Stable Manifold ◽  
Period Doubling ◽  
Quantitative Information ◽  
Stable And Unstable Manifolds ◽  
Bz Reaction ◽  
Positive Orthant ◽  
Model Independent ◽  
Unstable Manifolds ◽  
Belousov Zhabotinsky Reaction ◽  
Concentration Space

The intricate geometry of stable and unstable manifolds of a saddle cycle arising from a super-critical period-doubling bifurcation is explored experimentally for the Belousov-Zhabotinsky (BZ) reaction in a CSTR (Continuous flow Stirred Tank Reactor). We find clear experimental evidence that the stable manifold winds round the stable period-doubled orbit arising at the bifurcation. The stable manifold is probed experimentally by perturbations from the period-doubled limit cycle. The method provides a model-independent experimental test for species essential for the complexity, as well as quantitative information about the geometry of the limit cycles, the associated manifolds, and their embedding in the concentration space. The results are supported by simulations of the experiments with a four-dimensional model of the BZ reaction. Here stable manifold has several branches showing some tendency of curling. However the branches may end on the boundary of the positive orthant of the concentration space.

Experimental study of embedding of attractors in concentration space

1990 ◽  
Vol 42 (2) ◽  
pp. 309-315 ◽  
Author(s):  
P. Grace Sørensen ◽  
F. Hynne ◽  
K. Nielsen
Keyword(s):  
Experimental Study ◽  
Concentration Space

scholarly journals Analysis of progress curves. Rate law of pyruvate kinase type I from Escherichia coli

1980 ◽  
Vol 189 (3) ◽  
pp. 421-433 ◽  
Author(s):  
M Markus ◽  
T Plesser ◽  
A Boiteux ◽  
B Hess ◽  
M Malcovati
Keyword(s):  
Escherichia Coli ◽  
Pyruvate Kinase ◽  
Regulatory Region ◽  
Conformational State ◽  
Type I ◽  
Allosteric Site ◽  
Rate Law ◽  
Ph Stat ◽  
Stat Method ◽  
Concentration Space

Progress curves of the reaction catalysed by pyruvate kinase from Escherichia coli K12, designed to cover the four-dimensional concentration space of phosphoenolpyruvate, ADP, Mg2+ and ATP in the regulatory region, were recorded with the pH-stat method (pH 7.0 and 25 degrees C). Additional initial-rate measurement were performed to assess specific points. Two methods for the evaluation of progress curves were used: fitting the rate law to the rates obtained from the tangents of the progress curves and fitting the integrated rate law directly to the curves. Two models, both extensions of the concerted model given by Monod, Wyman & Changeux [(1965) J. Mol. Biol. 12, 88–118] with four protomers, could be fitted to the data within the experimental error. Model discrimination in favour of one of these models was possible by proper experimental design. In the selected model one conformational state of the enzyme forms the active complex. The active site of a second conformational state forms abortive complexes with Mg2+, causing strong inhibition at high Mg2+ concentrations. In the absence of ligands, most of the enzyme is in a third state that binds ATP at an allosteric site.

scholarly journals Human beings as islands of stability: Monitoring body states using breath profiles

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Kiran Sankar Maiti ◽  
Michael Lewton ◽  
Ernst Fill ◽  
Alexander Apolonski
Keyword(s):  
The Body ◽  
Human Beings ◽  
Stability Monitoring ◽  
Test Study ◽  
Long Time ◽  
Small Test ◽  
The Individual ◽  
Different Characteristics ◽  
Temporal Profiles ◽  
Concentration Space

Abstract By checking the reproducibility of conventional mid-infrared Fourier spectroscopy of human breath in a small test study (15 individuals), we found that a set of volatile organic compounds (VOC) of the individual breath samples remains reproducible at least for 18 months. This set forms a unique individual’s “island of stability” (IOS) in a multidimensional VOC concentration space. The IOS stability can simultaneously be affected by various life effects as well as the onset of a disease. Reflecting the body state, they both should have different characteristics. Namely, they could be distinguished by different temporal profiles: In the case of life effects (beverage intake, physical or mental exercises, smoking etc.), there is a non-monotonic shift of the IOS position with the return to the steady state, whereas a progressing disease corresponds to a monotonic IOS shift. As a first step of proving these dependencies, we studied various life effects with the focus on the strength and characteristic time of the IOS shift. In general, our results support homeostasis on a long time scale of months, allostasis on scales of hours to weeks or until smoke quitting for smokers, as well as resilience in the case of recovery from a disease.

scholarly journals DC breakdown characteristics of XLPE/BNNS nanocomposites considering BN nanosheet concentration, space charge and temperature

High Voltage ◽  
2020 ◽  
Vol 5 (3) ◽  
pp. 280-286 ◽  
Author(s):  
Guochang Li ◽  
Xuguang Zhou ◽  
Xuejing Li ◽  
Yanhui Wei ◽  
Chuncheng Hao ◽  
...  
Keyword(s):  
Space Charge ◽  
Concentration Space

scholarly journals Concentrated protein solutions investigated using acoustic levitation and small-angle X-ray scattering

2020 ◽  
Vol 27 (2) ◽  
pp. 396-404
Author(s):  
Pernille Sønderby ◽  
Christopher Söderberg ◽  
Christian G. Frankær ◽  
Günther Peters ◽  
Jens T. Bukrinski ◽  
...  
Keyword(s):  
Protein Concentration ◽  
Strength Parameter ◽  
Protein Solutions ◽  
Limited Sample ◽  
Saxs Data ◽  
X Ray Scattering ◽  
Levitated Droplet ◽  
Flow Through ◽  
Concentration Space ◽  
Selection Of

An acoustically levitated droplet has been used to collect synchrotron SAXS data on human serum albumin protein solutions up to a protein concentration of 400 mg ml−1. A careful selection of experiments allows for fast data collection of a large amount of data, spanning a protein concentration/solvent concentration space with limited sample consumption (down to 3 µL per experiment) and few measurements. The data analysis shows data of high quality that are reproducible and comparable with data from standard flow-through capillary-based experiments. Furthermore, using this methodology, it is possible to achieve concentrations that would not be accessible by conventional cells. The protein concentration and ionic strength parameter space diagram may be covered easily and the amount of protein sample is significantly reduced (by a factor of 100 in this work). Used in routine measurements, the benefits in terms of protein cost and time spent are very significant.

scholarly journals THE STRATEGY OF STUDYING THREE-LIQUID PHASE EQUILIBRIA IN THE CONCENTRATION SPACE OF QUATERNARY MIXTURES

2016 ◽  
Vol 11 (5) ◽  
pp. 65-69 ◽  
Author(s):  
A. Yu. Sebyakin ◽  
A. K. Frolkova
Keyword(s):  
Phase Separation ◽  
Liquid Phase ◽  
Distillation Column ◽  
Mathematical Concept ◽  
Intersection Point ◽  
Topological Invariant ◽  
Fundamental Question ◽  
Liquid Phases ◽  
Concentration Space ◽  
Concentration Simplex

When separating multicomponent heterogeneous mixtures in units consisting of a distillation column and a decanter, a fundamental question is the location of phase separation regions with different numbers of liquid phases in the concentration simplex. A solution of this issue is based on data on the vapor-liquid and liquid-liquid equilibria of the mixture and its components, as well as on the general laws of the formation of the topological structure of phase separation areas. A strategy of studying the three-liquid phase equilibrium area in quaternary mixtures is proposed. The strategy is based on the formula of a topological invariant of the separation region and on the mathematical concept of centroid - the intersection point of three medians. The presence of threeliquid phase areas of separation of open and closed types is shown. They differ in the absence (presence) of region of degeneracy via the critical node.

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