scholarly journals Influence of Liquid Inclusions to Explosive Instability of Ice

2021 ◽  
Vol 16 (3) ◽  
pp. 134-139
Author(s):  
Bordonskiy Georgy S. ◽  
Keyword(s):  
Liquid Phase ◽  
Coming Out ◽  
Thermodynamic Characteristics ◽  
Mechanical Instability ◽  
Explosive Instability ◽  
Widom Line ◽  
Mechanical Deformations ◽  
Liquid Transition ◽  
Polycrystalline Ice ◽  
The One

The influence of the nuclei of the liquid phase arising during mechanical deformations of polycrystalline ice at temperatures below -40 ... -45 C on its explosive instability is considered. The nucleus of the liquid phase appear in ice when part of the hydrogen bonds are broken when high pressure is applied to ice crystals. The resulting clusters can have characteristics close to those of bulk metastable water. It is known that such water in the region of negative temperatures has anomalous thermodynamic characteristics. In particular, at a temperature of -60 C and a pressure of 100 MPa, there is a second critical point of water for the liquid-liquid transition. It was found that the transition occurs between the two types of water LDL (low density water) and HDL (high density water), with the Widom line coming out into the one-component region of the water phase diagram. This line is the locus of increased fluctuations in entropy and density. Near atmospheric pressure, the temperature on the Widom line is -45 C. If the pressure inside the ice and its temperature turn out to be close to the line of coexistence of LDL and HDL, then liquid inhomogeneities can become a source of mechanical instability of the medium due to the growth of fluctuations in the energy of molecules and destruction of the ice structure. Such conditions can occur at temperatures below -45 C and pressures above 100 MPa.

ДОСВІД У ДИСКУСІЙНОМУ ПОЛІ ПОЗИЦІЮВАННЯ КАТЕГОРІЇ "ТВОРЧИЙ ПОТЕНЦІАЛ"

1970 ◽  
Vol 6 (1) ◽  
pp. 62-71
Author(s):  
Лариса Міщиха
Keyword(s):  
Coming Out ◽  
Motion Vector ◽  
Integral Form ◽  
Phenomenological Approach ◽  
Humanistic Psychology ◽  
Creative Potential ◽  
Form Of Life ◽  
Conceptual Background ◽  
Creative Experience ◽  
The One

У статті зроблено спробу проаналізувати феномен "досвід" у форматі дослідження творчого потенціалу особистості. Теоретико-методологічними засадами заявленої вище проблеми стали концептуальні засади гуманістичної психології, феноменологічного підходу. Досвід, як вагома складова творчого потенціалу особистості, розглядається у співвідношенні таких провідних тенденцій, як стереотипність та оригінальність. Наголошується, що досвід, з одного боку, може сприяти все більшій алгоритмізації та стереотипізації, консерватизму у розв’язанні нових задач, що безумовно перешкоджає творчості. З іншого боку, в осіб з високим творчим потенціалом він стає інтегрованою формою життєтворчості, де в структурі старих знань завжди знайдеться місце новим знанням як привнесених "ззовні", так і знанням, що їх отримує автор через власні ініціації, пошук, накреслюючи власноруч вектор руху. Звідси він отримує "побічний продукт" творчої діяльності – саморозвиток. Відтак творчий досвід трактується як такий, що містить у собі акумуляцію та інтеграцію усіх прижиттєвих творчих напрацювань особистості, готовність її до творчої діяльності та безперервної освіти. Суб’єкт творчої діяльності залишається відкритим новому досвіду, сповнений готовності до нового пізнання, творчих пошуків. In the article there was an attempt to analyze the phenomenon "experience" in the form of investigating a person’s creative potential. The theoretic methodological background of the performed above problem is conceptual background of humanistic psychology and phenomenological approach. Experience as an essential part of a person’s creative potential is regarded in relation to such leading trends as stereotype and originality. On the one hand, the experience is emphasized to be able to promote the model of algorithm and stereotype, conservatism in solving new tasks that is certain to inhibit creativity. On the other hand, personalities with high creative potential have an experience that is becoming an integral form of life work where in the structure of old knowledge you can always find a place for both new ones coming out "from inside" and the ones the author takes due to his own initiation and search. In this way he sketches motion vector and gets the "by-product" of his creativity, it means self-development. Hence, creative experience is interpreted as the one to absorb accumulation and integration of all creative experience in a person’s life; also his/her readiness to creativity and continuing education. The subject of creativity remains opened to a new experience that is fully ready for a new cognition and creativity.

Effect of microbial isolates on microbial yield estimation in RUSITEC system

1998 ◽  
Vol 22 ◽  
pp. 306-308
Author(s):  
M. D. Carro ◽  
E. L. Miller
Keyword(s):  
Protein Synthesis ◽  
Liquid Phase ◽  
Solid Phase ◽  
Liquid Fraction ◽  
Microbial Protein ◽  
Microbial Protein Synthesis ◽  
Continuous Culture System ◽  
The One

The estimation of rumen microbial protein synthesis is one of the main points in the nitrogen (N)-rationing systems for ruminants, as microbial protein provides proportionately 0.4 to 0.9 of amino acids entering the small intestine in ruminants receiving conventional diets (Russell et al., 1992). Methods of estimating microbial protein synthesis rely on marker techniques in which a particular microbial constituent is related to the microbial N content. Marker : N values have generally been established in mixed bacteria isolated from the liquid fraction of rumen digesta and it has been assumed that the same relationship holds in the total population leaving the rumen (Merry and McAllan, 1983). However, several studies have demonstrated differences in composition between solid-associated (SAB) and fluid-associated bacteria in vivo (Legay-Carmier and Bauchart, 1989) and in vitro (Molina Alcaide et al, 1996), as well in marker : N values (Pérez et al., 1996). This problem could be more pronounced in the in vitro semi-continuous culture system RUSITEC, in which there are three well defined components (a free liquid phase, a liquid phase associated with the solid phase and a solid phase), each one having associated microbial populations.The objective of this experiment was to investigate the effect of using different bacterial isolates (BI) on the estimation of microbial production of four different diets in RUSITEC (Czerkawski and Breckenridge, 1977), using (15NH4)2 SO4 as microbial marker, and to assess what effects any differences would have on the comparison of microbial protein synthesis between diets.This study was conducted in conjunction with an in vitro experiment described by Carro and Miller (1997). Two 14-day incubation trials were carried out with the rumen simulation technique RUSITEC (Czerkawski and Breckenridge, 1977). The general incubation procedure was the one described by Czerkawski and Breckenridge (1977) and more details about the procedures of this experiment are given elsewhere (Carro and Miller, 1997).

A Liquid Phase in Polycrystalline Ice

Nature ◽  
1971 ◽  
Vol 230 (5290) ◽  
pp. 147-147
Keyword(s):  
Liquid Phase ◽  
Polycrystalline Ice

Enhanced stability of Pd/SPS catalyst over the one-pot liquid-phase synthesis of methyl isobutyl ketone by adding GO

2019 ◽  
Vol 478 ◽  
pp. 110609 ◽  
Author(s):  
Yifan Zhu ◽  
Baining Lin ◽  
Yingjie Hu ◽  
Zhihui Cai ◽  
Huasheng Xie ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Methyl Isobutyl Ketone ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone ◽  
One Pot ◽  
Phase Synthesis ◽  
The One ◽  
Enhanced Stability

COMPARISON BETWEEN MOLECULAR DYNAMICS AND MONTE CARLO DESCRIPTIONS OF SOLID–LIQUID PHASE-TRANSITION OF LENNARD–JONES FLUIDS

2010 ◽  
Vol 21 (03) ◽  
pp. 349-363 ◽  
Author(s):  
A. S. MARTINS ◽  
C. X. S. SEIXAS ◽  
L. B. dos SANTOS ◽  
P. R. RIOS
Keyword(s):  
Phase Transition ◽  
Molecular Dynamics ◽  
Monte Carlo ◽  
Liquid Phase ◽  
Structural Evolution ◽  
Liquid Phase Transition ◽  
Monte Carlo Techniques ◽  
Lennard Jones ◽  
Liquid Transition ◽  
Solid Liquid

Molecular dynamics and Monte Carlo techniques are employed for the study of Lennard–Jones fluids near the solid–liquid transition region. Systematic comparisons between the predictions of both techniques are discussed, with particular emphasis on the structural evolution and location of the transition (melting) temperature Tm.

Proton Magnetic Resonance Evidence of a Liquid Phase in Polycrystalline Ice

1971 ◽  
Vol 230 (12) ◽  
pp. 91-92 ◽  
Author(s):  
J. D. BELL ◽  
R. W. MYATT ◽  
R. E. RICHARDS
Keyword(s):  
Liquid Phase ◽  
Magnetic Resonance ◽  
Proton Magnetic Resonance ◽  
Polycrystalline Ice

scholarly journals The Spheroidal/Ellipsoidal, Variable Mass-Loss, Decelerated Be Star Model (Review Paper)

1987 ◽  
Vol 92 ◽  
pp. 384-410 ◽  
Author(s):  
V. Doazan
Keyword(s):  
Variable Mass ◽  
Thermodynamic Characteristics ◽  
Be Stars ◽  
Star Model ◽  
B Stars ◽  
Proposed Model ◽  
Mass Outflow ◽  
Be Star ◽  
Model Review ◽  
The One

The proposed model is empirical; it is based on analysis of the available data on Be stars obtained in all the observable spectral regions, and it is required to be thermodynamically self-consistent. Rather than trying to answer the question: “What is the origin of the Be-phenomenon?” We ask: First. “What phenomena characterize empirically Be stars?” Second, “What thermodynamic characteristics are implied by the existence of such phenomena?” Third. “What inferences may be made an the atmospheric structure of a Be star from these empirical and thermodynamical characteristics?” The observed phenomena, their thermodynamical implications and the resulting model have each two aspects. On the one hand, the observational evidence for a nonradiatively heated, expanding chromosphere-corona implies the existence of both a nonradiative energy flux and a mass outflow from the photosphere. This first aspect is common to both Be and normal B stars, at least for the earliest subtypes.

Apocalypse NOW!

2012 ◽  
Author(s):  
Volker Woltersdorff
Keyword(s):  
Coming Out ◽  
Symbolic Order ◽  
Aids Activism ◽  
The Future ◽  
Queer Politics ◽  
Work Of Mourning ◽  
The One

This essay analyses apocalyptic rhetoric in recent queer theoretical writings on negativity and temporality, in particular the invocation of an end, and its use for political radicality. The suspension of progressive time in favour of alternative temporalities, such as reversion, circularity or endless presence, has for long been a strategy of subcultural performance, coming out narratives, AIDS activism, and other queer politics. Such strategies stage a rupture within the linearity of time and the symbolic order of discourse. The author illustrates the potentials and pitfalls of this rhetoric gesture by elaborating its inherent dialectics between the disruption and the emergence of temporality. The dialectics consist precisely in that by radically negating historicity, apocalyptical rhetorics make history. Invoking the end of future thus empowers the one who is speaking, as it installs an immediate urgency for action and interpellates queer subjects. Yet, the assumed radicality often hides the privileged condition of its formation. By universalising the particularity of this perspective, it runs the risk of turning radical negativity into radical affirmation. In conclusion, the author claims that it is the loss of futurity rather than, as some antisocial approaches argue, the active destruction or negation of futurity that ought to be regarded as queer momentum. For when the experience of a queer loss results in a work of mourning, it aims at reappropriating the future and articulating it in unforeseen and queer ways.

An enhanced rate of the high-Tc phase formation in the Bi–Ca–Sr–Cu–O superconductor by the two-step reaction and rapid heating

1991 ◽  
Vol 6 (5) ◽  
pp. 916-927 ◽  
Author(s):  
Hyun M. Jang ◽  
Jong H. Moon ◽  
Hyun J. Shin
Keyword(s):  
Liquid Phase ◽  
Phase Formation ◽  
Rapid Heating ◽  
Reaction Scheme ◽  
Synthetic Approach ◽  
Activation Free Energy ◽  
High Tc Phase ◽  
One Step ◽  
Rich Liquid ◽  
The One

An alternative synthetic approach was attempted for the fabrication of the Bi–Ca–Sr–Cu oxide superconductor. In this approach a mixed Sr–Ca–Cu oxide powder was first formed, and the resulting powder was subsequently reacted with Bi2O3. With this reaction scheme, problems associated with the low reactivity of CuO and SrCO3 can be partially removed by converting the mixed oxide/carbonate precursors to the reactive Sr–Ca–Cu compound. An enhanced rate of formation of the high-Tc (110 K) phase was observed in the two-step reaction, and this was explained in terms of the low activation free energy path for the formation of the high-Tc phase, which increased the decomposition rate of the remnant CuO. Under the condition of rapid heating, the formation of the high-Tc phase in the one-step reaction was expedited by the Cu-rich liquid phase. However, the liquid phase caused the formation of an insulating layer between the superconducting grains in spite of its catalytic activity in the high-Tc phase formation.

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