Comparison Study of the Acrylamide−Water and Polyacrylamide−Water Systems:  Differential Heat Effects, Kinetics, and Mechanisms of Drying and Vapor-Phase Wetting

Victor E. Ostrovskii; Bella V. Tsurkova; Elena A. Kadyshevich; Boris V. Gostev

doi:10.1021/jp013508c

Comparison Study of the Acrylamide−Water and Polyacrylamide−Water Systems: Differential Heat Effects, Kinetics, and Mechanisms of Drying and Vapor-Phase Wetting

The Journal of Physical Chemistry B ◽

10.1021/jp013508c ◽

2001 ◽

Vol 105 (50) ◽

pp. 12680-12687 ◽

Cited By ~ 8

Author(s):

Victor E. Ostrovskii ◽

Bella V. Tsurkova ◽

Elena A. Kadyshevich ◽

Boris V. Gostev

Keyword(s):

Vapor Phase ◽

Water Systems ◽

Comparison Study ◽

Differential Heat ◽

Heat Effects ◽

Phase Wetting

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METAL-OXYGEN-HYDROGEN SOLID SYSTEM OF CONTROLLED COMPOSITION: DIFFERENTIAL HEAT EFFECTS, KINETICS, AND MECHANISMS OF THE CuO → Cu4·OH2 GRADING

International Journal of Modern Physics B ◽

10.1142/s0217979202009433 ◽

2002 ◽

Vol 16 (01n02) ◽

pp. 42-49 ◽

Cited By ~ 8

Author(s):

VICTORE E. OSTROVSKII

Keyword(s):

Differential Heat ◽

Fine Crystal ◽

Kinetic Adsorption ◽

Heat Effects ◽

Copper Component ◽

Adsorption Desorption ◽

Solid System

The process of fine-crystal CuO reduction by successive small portions of H 2 was studied through isothermal calorimetric, kinetic, adsorption-desorption, and stoichiometric measurements at 293-520 K and H 2 pressures up to 100 Pa under conditions when equilibrium within the solid was achieved at any instant. The CuO studied was in the form of the component of the CuO-ZnO-Al 2 O 3 system. The stoichiometry of the copper component reduced corresponded to Cu 4· OH 2.

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THE THERMODYNAMIC DIAGRAMS FOR PHASE EQUILIBRIUM OF SYSTEMS ESSENTIAL OIL OF DILL – WATER AND DETERMINATION OF HEIGHT FOR COHOBATION COLUMN

Applied Researches in Technics Technologies and Education ◽

10.15547/artte.2018.01.006 ◽

2018 ◽

Vol 6 (1) ◽

pp. 40-44 ◽

Cited By ~ 1

Author(s):

Milen Dimov ◽

Stanislava Tasheva ◽

Krasimira Dobreva ◽

Albena Stoyanova

Keyword(s):

Phase Equilibrium ◽

Liquid Phase ◽

Essential Oil ◽

Vapor Phase ◽

Analytical Method ◽

Water Systems ◽

Actual Number ◽

Oil Water

The thermodynamic diagrams for the systems water essential oil from dill (fruits and leaves) were drawn. Equations were derived by which the vapor phase at certain liquid phase can be calculated for the essential oil-water systems mentioned above. Using the McCabe – Thiele graphic analytical method, the theoretical and actual number of trays for a cohobation column processing distillation waters from dill was calculated. The calculations were carried out for three concentrations of the dill distillation waters fed into the column – minimal, average and maximal. The height of the cohobation column for processing dill distillation waters was determined.

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Free-standing, thin-film sensors for the trace detection of explosives

Scientific Reports ◽

10.1038/s41598-021-86077-6 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Peter P. Ricci ◽

Otto J. Gregory

Keyword(s):

Vapor Phase ◽

Detection System ◽

Catalytic Decomposition ◽

Trace Detection ◽

Vapor Pressures ◽

Free Standing ◽

Thin Film Sensors ◽

Oxidation Reduction ◽

Heat Effects ◽

Specific Oxidation

AbstractIn a world focused on the development of cybersecurity, many densely populated areas and transportation hubs are still susceptible to terrorist attacks via improvised explosive devices (IEDs). These devices frequently employ a combination of peroxide based explosives as well as nitramines, nitrates, and nitroaromatics. Detection of these explosives can be challenging due to varying chemical composition and the extremely low vapor pressures exhibited by some explosive compounds. No electronic trace detection system currently exists that is capable of continuously monitoring both peroxide based explosives and certain nitrogen based explosives, or their precursors, in the vapor phase. Recently, we developed a thermodynamic sensor that can detect a multitude of explosives in the vapor phase at the parts-per-trillion (ppt) level. The sensors rely on the catalytic decomposition of the explosive and specific oxidation–reduction reactions between the energetic molecule and metal oxide catalyst; i.e. the heat effects associated with catalytic decomposition and redox reactions between the decomposition products and catalyst are measured. Improved sensor response and selectivity were achieved by fabricating free-standing, ultrathin film (1 µm thick) microheater sensors for this purpose. The fabrication method used here relies on the interdiffusion mechanics between a copper (Cu) adhesion layer and the palladium (Pd) microheater sensor. A detailed description of the fabrication process to produce a free-standing 1 µm thick sensor is presented.

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Planar defects in ordered (Ga,In)P

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100106570 ◽

1988 ◽

Vol 46 ◽

pp. 902-903

Author(s):

S. McKernan ◽

C. B. Carter ◽

D. Bour ◽

J. R. Shealy

Keyword(s):

Electron Diffraction ◽

Vapor Phase ◽

Growth Direction ◽

High Density ◽

Ordered Structure ◽

Planar Defects ◽

Diffraction Patterns ◽

Ternary Semiconductors ◽

Anion Species ◽

Metallic Vapor

The growth of ternary III-V semiconductors by organo-metallic vapor phase epitaxy (OMVPE) is widely practiced. It has been generally assumed that the resulting structure is the same as that of the corresponding binary semiconductors, but with the two different cation or anion species randomly distributed on their appropriate sublattice sites. Recently several different ternary semiconductors including AlxGa1-xAs, Gaxln-1-xAs and Gaxln1-xP1-6 have been observed in ordered states. A common feature of these ordered compounds is that they contain a relatively high density of defects. This is evident in electron diffraction patterns from these materials where streaks, which are typically parallel to the growth direction, are associated with the extra reflections arising from the ordering. However, where the (Ga,ln)P epilayer is reasonably well ordered the streaking is extremely faint, and the intensity of the ordered spot at 1/2(111) is much greater than that at 1/2(111). In these cases it is possible to image relatively clearly many of the defects found in the ordered structure.

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