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Articles de revues sur le sujet « Epitropia »

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Auteur : Grafiati
Publié le 26 juillet 2024

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1

Mikhailenko, V. I., et A. Yu Popovskii. « Thermodynamic properties of epitropic liquid crystals ». Physics of Aerodisperse Systems, no 54 (14 décembre 2017) : 51–57. http://dx.doi.org/10.18524/0367-1631.2017.54.132727.

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In this paper we used developed theoretical model earlier (called “two-component”) for numerical calculation of temperature dependencies of equilibrium ELC layer thickness hs(T), its specific heat Cp(T) and latent molar heat of phase transition ELC-bulk liquid q(T) with further comparison with experiment. This model postulates the existence of both monomers and dimers in the wall-adjacent layer, and the appearance of ELC layer is caused by the orientational interaction between these liquid particles and the solid substrate. The calculations were compared with results of experimental investigation of thin nitrobenzene interlayer symmetrically bounded by quartz substrates.
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Altoiz, B. A., A. Yu Popovskii et A. F. Butenko. « The structure of overlapped epitropic LC ». Physics of Aerodisperse Systems, no 61 (9 décembre 2023) : 63–69. http://dx.doi.org/10.18524/0367-1631.2023.61.291101.

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The proposed model of the structure of the wall-adjacent epitropic liquid crystalline layer considers it as an oligomeric system of thread-like associates in a non-associated liquid. The results of ELC studies of layers of aliphatic hydrocarbon - n-hexadecane are analyzed. The study of the ELC phase in n-alkanes is important both for the modification of the quantitative physical theory of this phenomenon, and in a practical sense, as it allows to solve practical problems related to the control of boundary friction in mechanisms and parts of machines. Previously, the results of rheological and structural-optical studies of the properties of these systems were considered separately, and the results obtained in the molecular-statistical model were not correlated in detail with the results of rheological measurements for the case of overlapped near-surface layers. To interpret the results of studies (by rheological and optical methods) of such a layer in interlayers of n-hexadecane, symmetrically limited by conductive substrates, it is proposed to take into account the increase in the concentration of the ordered component ("pile") under the condition that the wall layers of epitropic liquid crystals in the interlayer overlap. It will also allow to take into account the results obtained in the molecular statistical model in the processing of rheological data.
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Altoiz, B. A., A. Yu Popovskii et A. F. Butenko. « Equilibrium parameters of a structured n-hexadecane layer ». Physics of Aerodisperse Systems, no 54 (14 décembre 2017) : 35–44. http://dx.doi.org/10.18524/0367-1631.2017.54.132718.

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The temperature dependences of the structural characteristics of the quasi-liquidcrystalline n-hexadecane layers − their equilibrium thickness and the degree of orientational order were determined by such optical methods as measurements of admixture dichroism and the anisotropy of heterophase interlayers. The values of these epitropic liquid-crystalline layer parameters were compared with those established earlier in rheological experiments.
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Levchenko, V. A. « Epitropic liquid crystals — a new liquid phase ». Journal of Molecular Liquids 85, no 1-2 (avril 2000) : 197–210. http://dx.doi.org/10.1016/s0167-7322(99)00178-6.

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5

Popovskii, A. Yu, et V. I. Mikhailenko. « Properties of Wall-Adjacent Epitropic Liquid Crystalline Layers ». Ukrainian Journal of Physics 57, no 2 (15 février 2012) : 224. http://dx.doi.org/10.15407/ujpe57.2.224.

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A two-component theoretical model of orientational ordering in wall-adjacent layers of a nonmesogenic liquid (consisting of monomers and dimers) with anisotropic intermolecular interaction has been developed. In the framework of the model, a number of experimental results such as the isotherms of disjoing pressure and some peculiarities in the behavior of heat capacity and dielectric permittivity of the liquid interlayers have been explained.
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Lyakhova, E. « Ising model of the epitropic liquid crystalline phase ». Journal of Molecular Liquids 93, no 1-3 (septembre 2001) : 203–6. http://dx.doi.org/10.1016/s0167-7322(01)00231-8.

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Altoiz, B. A., V. N. Bondarev, E. A. Shatagina et S. V. Kiriyan. « Model of organization of the epitropic liquid phase ». Technical Physics 59, no 7 (juillet 2014) : 1003–6. http://dx.doi.org/10.1134/s1063784214070020.

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8

Derjaguin, B. V., B. A. Altoiz et I. I. Nikitenko. « Epitropic liquid crystal layers of nonmesogens on quartz substrate ». Journal of Colloid and Interface Science 145, no 2 (septembre 1991) : 441–46. http://dx.doi.org/10.1016/0021-9797(91)90375-i.

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9

Derjaguin, B. V., B. A. Altoiz et I. I. Nikitenko. « Epitropic liquid crystal layers of nonmesogens on quartz substrate ». Progress in Surface Science 45, no 1-4 (janvier 1994) : 44–49. http://dx.doi.org/10.1016/0079-6816(94)90030-2.

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10

Popovskii, A. Yu, et V. I. Mikhailenko. « Thickness Dependence of Refractivity in Wall-Adjacent Epitropic Liquid Crystal ». Ukrainian Journal of Physics 59, no 3 (mars 2014) : 299–302. http://dx.doi.org/10.15407/ujpe59.03.0299.

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11

Поповський, О. Ю., Б. А. Алтоїз et О. Ф. Бутенко. « Epitropic layers of oleic acid. Orientational ordering and rheological characteristics ». Physics of aerodisperse systems, no 57 (17 janvier 2020) : 34–46. http://dx.doi.org/10.18524/0367-1631.2019.57.191917.

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Popovskii, А. Yu, B. А. Altoiz et А. F. Butenko. « Structural characteristics of the epitropic liquid-crystalline layer of oleic acid ». Physics of aerodisperse systems, no 55 (14 décembre 2018) : 37–44. http://dx.doi.org/10.18524/0367-1631.2018.55.149890.

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13

Zheleznov, A. G., V. A. Godlevskiy et O. V. Blinov. « Definition of Forming Processes Microparameters for Epitropic Liquid Crystal Boundary Lubrication Layers ». Liquid Crystals and their Application 20, no 4 (29 décembre 2020) : 72–77. http://dx.doi.org/10.18083/lcappl.2020.4.72.

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The kinetics theory of ordered boundary lubricating layer formation is presented. The theory contains the description of the formation of boundary lubricating layer from liquid lubricating media containing tribo-active adsorbing component. The expressions for specific forming time and thickness of the boundary lubrication layer in the conditions of the considered model are defined. The prospects of the mentioned parameters experimental definition they are marked out. The tribological efficiency parameter of tribological additive is introduced. This parameter can be evaluated in model physicochemical researches or by molecular modelling methods.
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14

Altoiz, B. A., T. V. Naroditskaya et Yu M. Popovskii. « Influence of magnetic field on the molecular orientation in epitropic mesophase of nitrobenzene ». Advances in Colloid and Interface Science 104, no 1-3 (juillet 2003) : 239–43. http://dx.doi.org/10.1016/s0001-8686(03)00044-7.

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15

Altoiz, B. A., A. F. Butenko et S. V. Kiriyan. « Epitropic Liquid-Crystal Hexadecane Layer in the Rheological Model of a Heterophase Interlayer ». Technical Physics 63, no 1 (janvier 2018) : 1–6. http://dx.doi.org/10.1134/s1063784218010036.

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16

Egetenmeier, Philip. « Stellvertreter seleukidischer Könige. Eine kritische Analyse zum ‚Kanzler‘ im Seleukidenreich ». Klio 103, no 2 (9 novembre 2021) : 560–607. http://dx.doi.org/10.1515/klio-2020-1031.

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Zusammenfassung Die vorliegende Studie widmet sich seleukidischen Amtsträgern, die in den Quellen als Leiter der Regierungsgeschäfte dargestellt werden. Eine kritische Analyse der epigraphischen Zeugnisse und der Berichte antiker Autoren (1 und 2 Makkabäer, Flavius Josephus, Polybios) soll zeigen, dass zwei unterschiedliche Phänomene voneinander zu trennen sind: (1) ein situativ oder permanent ernannter Stellvertreter eines Königs für ein bestimmtes Territorium (epi ton pragmaton) und (2) ein Vormund für einen regierungsunfähigen König (epitropos / prostates). Die moderne Forschung neigt dazu, den ersten Terminus zu verallgemeinern und als Amt eines ‚Kanzlers‘ (vel sim.) zu verstehen, der die Regierungsgeschäfte auf Wunsch des Königs leitete. Auf Basis der Quellen und bei strenger Beachtung der Chronologie ist diese geläufige Vorstellung jedoch nicht haltbar. Der Untersuchungszeitraum erstreckt von der ausgehenden Regierungszeit des Seleukos III. bis zu jener des Demetrios II. (ca. 223 bis Mitte 2. Jhd. v. Chr.).
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17

Popovskii, A. Yu, B. A. Altoiz, A. F. Butenko, A. K. Kopeyka et Laurencas Raslavicius. « Operational characteristics of new biological lubricants ». Physics of aerodisperse systems, no 59 (8 novembre 2021) : 201–11. http://dx.doi.org/10.18524/0367-1631.2021.59.236756.

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The lubricating characteristics of ultrathin interlayers of bio-oil RMO made from coastal algae P.Moriformis are investigated in this work. One of the most important qualities of the oil is its lubricity of the friction surfaces. It determines the possibility of formation of a stable separating film between contact surfaces, with orientational ordering in wall adjacent layers, with the strength value required in the boundary friction regime. The structural characteristics of such epitropic-liquid crystal (ELC) layers are essential when choosing a lubricant. Static friction pair was studied by the optical method of admixtured absorption dichroism. It was found that the value of the order parameter of ELC layer and its equilibrium thickness are much higher in compare with the layers of aliphatic hydrocarbons, which are the basis of modern mineral lubricants. The rheological characteristics of ultrathin interlayers were studied in a dynamic triad of friction. Processing of the effective viscosity coefficient dependence on the shear rate, interlayer thickness and temperature allowed us to estimate the value of equilibrium thickness of the ELC layer, which coincides with the results of optical measurements. The marked structural peculiarities of the ELC in the biooil interlayers are conditioned with the formation of molecular associates of oleic acid, which is the main component of studied oil.
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18

Kiriyan, S. V., B. A. Altoiz, E. A. Shatagina et A. A. Shatagina. « Influence of the tridecane and heptadecane molecule chain length on the structural characteristics of their epitropic liquid-crystal layers ». Journal of Engineering Physics and Thermophysics 85, no 2 (mars 2012) : 459–63. http://dx.doi.org/10.1007/s10891-012-0673-2.

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19

McCullough, A., A. Dueck, B. Chen, M. Reinholz, A. Wiktor, W. Lingle, R. Jenkins et E. Perez. « HER-2 central confirmatory testing using ASCO/CAP guidelines for trastuzumab/lapatinib trial MCCR RC0639 ». Journal of Clinical Oncology 27, no 15_suppl (20 mai 2009) : e11527-e11527. http://dx.doi.org/10.1200/jco.2009.27.15_suppl.e11527.

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e11527 Background: 118 Her2 positive invasive carcinomas were retested centrally at the Mayo Clinic for Her2 status confirmation prior to inclusion in Mayo Clinic Cancer Research Consortium study RC0639 phase II study of cardiac safety and tolerability of adjuvant chemotherapy plus trastuzumab with lapatinib for resected Her2+ breast cancer (MCCRC RC0639). Methods: Central confirmatory methods were immunohistochemical (IHC) Dako HercepTest on a Dako Autostainer using the manufacturer's recommendations and HercepTest kit epitrope retrieval kit and fluorescent in situ hybridization (FISH) using Vysis PathVysion probe kit. Test results are interpreted using ASCO/CAP guidelines (IHC >30%, Her2:CEP 17 ratio >2.2). Results: There is local and central test 3+ IHC concordance in 48 of 53 tumors (agreement 90.6%) and FISH amplification in 29 of 33 tumors (agreement 87.9%), improved or similar results using identical methods to results in NCCTG N9831 adjuvant trial (n=1063, 81.6% IHC; n=813, 88.1% FISH). Of 92 centrally tested 3+ IHC positive tumors, 88 (95.7%) were FISH amplified. 5 centrally tested patients interpreted as Her2 positive by pre-ASCO/CAP guidelines (IHC >10%; HER2:CEP17 ratio >2) are Her2 ineligible using ASCO/CAP guidelines. IHC not confirmed centrally was reviewed by a second pathologist in 16 of 118 specimens. IHC concordance between two central pathologists was 10/16 (62.5%) in negative or equivocal (≤30% IHC staining) specimens; 7/10 (70%) with two reader agreement were FISH amplified and 4/6 (66%) with disagreement were FISH amplified. Conclusions: Concordance in IHC and FISH results between local and central labs is similar or improved since N9831. New ASCO/CAP Her2 testing guidelines change eligibility based on Her2 status in 4.2 % of patients. Equivocal IHC results falling between pre- and post- ASCO/CAP IHC positive thresholds (>10% and <30% IHC strong staining) are only partially resolved by repeat IHC review and/or FISH testing. No significant financial relationships to disclose.
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20

Boiko, M. V., I. V. Kolesnikov, S. F. Ermakov, T. G. Boiko et A. A. Bicherov. « Increasing the antifriction capacity of the bearing surfaces of tribosystems when using lubricants doped with cholesterol compounds and complexones ». Assembling in Mechanical Engineering and Instrument-Making, 2021. http://dx.doi.org/10.36652/0202-3350-2021-22-7-303-305.

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The tribo-induced effect of increasing the antifriction properties of lubricants with the combined use of cholesterol compounds and oil-soluble complexones is considered. It was found that the formation of boundary films is due to the following processes: the formation of complex compounds between ethanolamines and iron ions of the surface oxide film; removal of complexes from the friction surface; the interaction of the base of the lubricant with unoxidized iron; the formation of epitropic structured layers with cholesterol esters.
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21

Zhang, Yong-Sheng, De-Tong Kong, Min Zhang et Xiang-Yu Liu. « Monomorphic epitropic intestinal T-cell lymphoma presenting with intestinal perforation ». Asian Journal of Surgery, janvier 2024. http://dx.doi.org/10.1016/j.asjsur.2024.01.091.

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22

Candogan, Ozan, Markos Epitropou et Rakesh V. Vohra. « Competitive Equilibrium and Trading Networks : A Network Flow Approach ». Operations Research, 28 décembre 2020. http://dx.doi.org/10.1287/opre.2020.1997.

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This paper considers a network of agents who trade indivisible goods or services via bilateral contracts. Under a substitutability assumption on preferences, it is known that a competitive equilibrium exists. In “Competitive Equilibrium and Trading Networks: A Network Flow Approach,” Candogan, Epitropou, and Vohra show how to determine equilibrium outcomes as a generalized submodular flow problem. Existence of a competitive equilibrium and its equivalence to seemingly weaker notions of stability follow directly from the optimality conditions of the flow problem. The formulation enables the authors to perform comparative statics with respect to the number of buyers, sellers, and trades. In particular, they are able to shed light on the impact of new trading opportunities on the equilibrium trades, prices, and surpluses. In addition, they present algorithms for finding competitive equilibria in trading networks and testing stability.
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Savo, Maria Barbara. « Horos from Naxos with Pupillary apotimema ». Axon, no 2 (21 décembre 2020). http://dx.doi.org/10.30687/axon/2532-6848/2020/02/004.

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The horos was reported to Hiller von Gaertringer in June 1930 by Franz Gabriel Welter, engaged in excavations during the 1920s in the areas of Hyria and Livadi (Naxos). The document is remarkable for the definition of the concept of apotimema, the estimated value of properties given as security for the lease of property of a subject protected by the eponymous archon (orphans, widows and epikleroi). In this specific case, we have a pupillary apotimema: lands and the house, with the tiled roof, valued and placed as apotimema for the goods capitalised by the epitropos of Epiphron’s children. The capital loaned is 3,500 drachmas and the children would have obtained 400 drachmas as annual interest. Among the land pledged to guarantee the sum, the possessions in the localities of Elaious and Melanes are also mentioned, the latter’s toponym still in use for the village that is located in the north-central area of the island of Nassia.
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Savo, Maria Barbara. « Horos from Naxos with Pupillary apotimema ». Axon, no 2 (22 décembre 2020). http://dx.doi.org/10.30687/axon/2532-6848/2020/08/004.

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The horos was reported to Hiller von Gaertringer in June 1930 by Franz Gabriel Welter, engaged in excavations during the 1920s in the areas of Hyria and Livadi (Naxos). The document is remarkable for the definition of the concept of apotimema, the estimated value of properties given as security for the lease of property of a subject protected by the eponymous archon (orphans, widows and epikleroi). In this specific case, we have a pupillary apotimema: lands and the house, with the tiled roof, valued and placed as apotimema for the goods capitalised by the epitropos of Epiphron’s children. The capital loaned is 3,500 drachmas and the children would have obtained 400 drachmas as annual interest. Among the land pledged to guarantee the sum, the possessions in the localities of Elaious and Melanes are also mentioned, the latter’s toponym still in use for the village that is located in the north-central area of the island of Nassia.
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25

Essex, Christopher, et Bjarne Andresen. « The Ideal Gas in Slow Time ». Journal of Non-Equilibrium Thermodynamics, 18 novembre 2020. http://dx.doi.org/10.1515/jnet-2020-0007.

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AbstractWe continue our exploration of thermodynamics at long observational timescales, “slow time,” by including turbulent dynamics leading to a condition of fluctuating local equilibrium. Averaging these fluctuations in wind speed and temperature results in a velocity distribution with heavy tails which, however, are necessarily truncated at some large molecular speed preserving all moments of the velocity distribution including the energy. This leads to an expression for the ideal gas law in slow time which as its core has the superficially familiar term \frac{3}{2}Nk\theta in addition to a term accounting for the large-scale fluctuations, which is also proportional to the particle number N; θ is a new temperature including thermalization of wind. The traditional temperature T no longer exists. Likewise, the additional energy term necessitates a new quantity that parallels entropy in the sense that it captures hidden degrees of freedom. Like entropy, it captures physical properties manifesting indirectly, but on scales larger than the familiar laboratory scales. We call this quantity epitropy.
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TC, Campbell. « Nutritional Renaissance and Public Health Policy ». Journal of Nutritional Biology 3, no 1 (11 octobre 2017). http://dx.doi.org/10.18314/jnb.v3i1.145.

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The science of nutrition has long been entrapped in reductionist interpretation of details, a source of great confusion. However, if nutrition is defined as the integration of countless nutrient factors, metabolic reactions and outcomes, biologically orchestrated as in symphony, its relevance for personal and public health would be less confusing and more productive. This more wholistic interpretation may be observed at the cellular and physiological levels and may be described, in part, by the concept of pleiotropy (multiple cell-based effects from one nutrient source), together with its more expansive cousin, epitropy (multiple cell-based effects from multiple nutrients). First, wholistic interpretation helps to explain the profound but little-known health benefits of whole plant-based foods (not vegan or vegetarian) when compared with whole animal-based foods and/or with the nutritionally variable convenience foods (generally high in fat, salt, refined carbohydrates and low in complex carbohydrates). Second, wholistic interpretation explains why the U.S. Dietary Guidelines and related public policies, which are primarily conceived from reductionist reasoning, serve political agendas so effectively. If diet and health advisories were to acknowledge the biological complexity of nutrition, then make greater use of deductive (top down) instead of inductive (bottom up) reasoning, there would be less confusion. Third, wholistic nutrition, if acknowledged, could greatly help to resolve the highlypolarized, virtually intractable political debate on health care. And fourth, this definition tells why nutrition is rarely if ever offered in medical school training, is not one of the 130 or so medical specialties, and does not have a dedicated research institute at U.S. National Institutes of Health. Nutrition is a wholistic science whereas medical practice is reductionist, a serious mismatch that causes biased judgement of nutrition. But this dichotomy would not existif the medical practice profession were to understand and adopt wholistic interpretation. Reductionist research, however, is crucially important because its findings provide the granular structure for wholistic interpretation—thesetwo philosophies are inescapably interdependent. Evidence obtained in this manner lends strong support to the suggestion that nutrition is more efficacious and far more affordable in maintaining and restoring (treating) health than all the pills and procedures combined. Admittedly, this is a challenging paradigm for the domain of medical science itself.
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