<i>Handbook of Techniques In High-Pressure Research And Engineering</i>

Tsiklis, Daniil S.; Scott, Thomas Allan

doi:10.1063/1.3022121

Cited by 9 publications

(7 citation statements)

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“…Data taken at increasing and decreasing pressure completely coincide; no indication of a hysteresis due to the apparatus is observed. Using water as a reference, substance agreement with previous measurements 16 was found within 0.5% in the pressure range up to 700 MPa.…”

Section: Methodssupporting

confidence: 84%

Pressure-induced isothermal glass transition of small organic molecules

2005

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We present a complete set of overlapping pressure-volume-temperature and dielectric relaxation data of the glass forming liquids propylene carbonate, meta-fluoroaniline, and glycerol under pressure up to 700 MPa. In all the samples a glass transition is induced by pressure at constant temperature. We compare the spectral shape of the structural relaxation process in the glass forming liquids with increasing pressure using a simple scaling for the maximum of the dielectric loss. Relaxation times measured at various temperatures and pressures can be scaled on a mastercurve by a single control parameter, the product of temperature and specific volume with a material-dependent exponent. This exponent exhibits the numerical value 4 for van der Waals liquids but is smaller for glass formers with hydrogen bonding.

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Section: Methodssupporting

confidence: 84%

Pressure-induced isothermal glass transition of small organic molecules

2005

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“…These systems usually reach pressures up to 5-6 GPa, but even higher pressures can be obtained [5][6][7]. Equipment that is known to generate high pressures is the Bridgman anvil apparatus [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

High-pressure compaction modelling of calcite (CaCO3) powder compact

2011

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“…21 The sealing of this type of support is based on the Bridgeman unsupported area principle. [21][22][23] In brief, sealing is accomplished because the viewing aperture creates a surface area imbalance between the fluid side and the support side of the window, resulting in a pressure differential, which ensures a strong seal. This sealing method, however, is heavily dependent upon the accurate machining of an optically flat surface on both the window and window support and is not reliable for very small apertures.…”

Section: Excitationõemission Ports and Pressure Inletmentioning

confidence: 99%

“…This sealing method, however, is heavily dependent upon the accurate machining of an optically flat surface on both the window and window support and is not reliable for very small apertures. 23 Methods for checking the surface quality of windows and supports have been reported by Sherman and Stadtmuller. 21 An additional seal between the window port assembly and the cell body must also be maintained.…”

Section: Excitationõemission Ports and Pressure Inletmentioning

confidence: 99%

Shape memory alloy activated high-pressure optical cell for biophysical studies

Zhou

Koulas

Chong

2000

Review of Scientific Instruments

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Articles you may be interested inDesign of a high-pressure circulating pump for viscous liquids Rev. Sci. Instrum. 80, 075104 (2009); 10.1063/1.3155450 Flow cell for in situ optical microscopy in water at high temperatures and pressures up to supercritical state Rev. Sci. Instrum. 73, 3938 (2002); 10.1063/1.1510550High-pressure autoclave for multipurpose nuclear magnetic resonance measurements up to 10 MPa Rev.The high-pressure optical cell ͑HPOC͒ originally designed by A. A. Paladini and G. Weber ͓Rev. Sci. Instrum. 52, 419 ͑1981͔͒ has been widely used in biophysical research. However, the original HPOC only allows for the observations of optical properties of single samples, thus limiting the data which researchers can obtain. The objective of this article is to demonstrate a new HPOC design, which enables researchers to introduce an additional component to the original sample for optical observation of biochemical reactions in real time, while all the components are under pressure. The core of this new design is the introduction of the shape memory alloy activated stopper/mixing mechanism, which separates different biological samples until the experimenter is ready to mix them. A urethane stopper separates the two samples, which are sealed in a dual chamber cuvette. The cuvette is suspended in the mid chamber, so that the pressure can be transmitted to both sides of the cuvette equally. Once an electric current is transmitted through the electrical plugs, the shape memory alloy is heated and moves the urethane stopper away from the neck of the cuvette. In addition, the shape memory alloy achieves a pumping action, which facilitates the mixing of the two samples. A multiple-chamber cuvette capable of mixing three components is also designed. Some preliminary feasibility testing has been done, and a stainless steel HPOC prototype has been built to validate the design.

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Handbook of Techniques In High-Pressure Research And Engineering

Cited by 9 publications

References 0 publications

Pressure-induced isothermal glass transition of small organic molecules

Pressure-induced isothermal glass transition of small organic molecules

High-pressure compaction modelling of calcite (CaCO3) powder compact

Shape memory alloy activated high-pressure optical cell for biophysical studies

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