Measurement of in situ Physical Properties of Shallow Water Sediments, Using the UW Sand Probe

Frazil particles, ice crystals or slushy granules that form in turbulent water, change the freezing properties of ice to create “frazil ice”. To understand the microstructural characteristics of these particles and the physical properties of frazil ice in greater depth, an in situ sampler was designed to collect frazil particles in the Yellow River. The ice crystal microstructural characteristics of the frazil particles (morphology, size, air bubble, and sediment) were observed under a microscope, and their nucleation mechanism was analyzed according to its microstructure. The physical properties of frazil ice (ice crystal microstructure, air bubble, ice density, and sediment content) were also observed. The results showed that these microstructures of frazil particles can be divided into four types: granular, dendritic, needle-like, and serrated. The size of the measured frazil particles ranged from 0.1 to 25 mm. Compared with columnar ice, the crystal microstructure of frazil ice is irregular, with a mean crystal diameter less than 5 mm extending in all directions. The crystal grain size and ice density of frazil ice are smaller than columnar ice, but the bubble and sediment content are larger.

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Impact of ripening on the physical properties of mango purees and application of simultaneous rheometry and in situ FTIR spectroscopy for rapid identification of biochemical and rheological changes

Journal of Food Engineering ◽

10.1016/j.jfoodeng.2021.110507 ◽

2021 ◽

Vol 300 ◽

pp. 110507

Author(s):

Paola Labaky ◽

Layal Dahdouh ◽

Julien Ricci ◽

Christelle Wisniewski ◽

Dominique Pallet ◽

...

Keyword(s):

Physical Properties ◽

Ftir Spectroscopy ◽

Rapid Identification ◽

In Situ Ftir ◽

In Situ Ftir Spectroscopy

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In situ polymerized poly(butylene succinate)/silica nanocomposites: Physical properties and biodegradation

Polymer Degradation and Stability ◽

10.1016/j.polymdegradstab.2008.02.007 ◽

2008 ◽

Vol 93 (5) ◽

pp. 889-895 ◽

Cited By ~ 59

Author(s):

Sang-Il Han ◽

Jung Seop Lim ◽

Dong Kook Kim ◽

Mal Nam Kim ◽

Seung Soon Im

Keyword(s):

Physical Properties ◽

Butylene Succinate ◽

Silica Nanocomposites

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Flow-law hypotheses for ice-sheet modeling

Journal of Glaciology ◽

10.1017/s0022143000003658 ◽

1992 ◽

Vol 38 (129) ◽

pp. 245-256 ◽

Cited By ~ 179

Author(s):

Richard B. Alley

Keyword(s):

Physical Properties ◽

Ice Sheets ◽

Diffusion Control ◽

Ice Streams ◽

Ice Shelves ◽

Dislocation Glide ◽

Ice Sheet Modeling ◽

Flow Law ◽

Power Law Creep

AbstractIce-flow modeling requires a flow law relating strain rates to stresses in situ, but a flow law cannot be measured directly in ice sheets. Microscopic processes such as dislocation glide and boundary diffusion control both the flow law for ice and the development of physical properties such as grain-size andc-axis fabric. These microscopic processes can be inferred from observations of the physical properties, and the flow law can then be estimated from the microscopic processes.A review of available literature shows that this approach can be imperfectly successful. Interior regions of large ice sheets probably have depth-varying flow-law “constants”, with the stress exponent,n, for power-law creep less than 3 in upper regions and equal to 3 only in deep ice;nprobably equals 3 through most of the thickness of ice shelves and ice streams.

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Influence of expanded graphite (EG) and graphene oxide (GO) on physical properties of PET based nanocomposites

Polish Journal of Chemical Technology ◽

10.2478/pjct-2014-0068 ◽

2014 ◽

Vol 16 (4) ◽

pp. 45-50 ◽

Cited By ~ 11

Author(s):

Sandra Paszkiewicz ◽

Małgorzata Nachman ◽

Anna Szymczyk ◽

Zdeno Špitalský ◽

Jaroslav Mosnáček ◽

...

Keyword(s):

Physical Properties ◽

In Situ Polymerization ◽

Crystallization Rate ◽

Expanded Graphite ◽

Exfoliated Graphene ◽

Poly Ethylene Terephthalate ◽

Poly Ethylene ◽

Agglomeration Of Nanoparticles ◽

Graphite Sheets

Abstract This work is the continuation and refinement of already published communications based on PET/EG nanocomposites prepared by in situ polymerization1, 2. In this study, nanocomposites based on poly(ethylene terephthalate) with expanded graphite were compared to those with functionalized graphite sheets (GO). The results suggest that the degree of dispersion of nanoparticles in the PET matrix has important effect on the structure and physical properties of the nanocomposites. The existence of graphene sheets nanoparticles enhances the crystallization rate of PET. It has been confirmed that in situ polymerization is the effective method for preparation nanocomposites which can avoid the agglomeration of nanoparticles in polymer matrices and improve the interfacial interaction between nanofiller and polymer matrix. The obtained results have shown also that due to the presence of functional groups on GO surface the interactions with PET matrix can be stronger than in the case of exfoliated graphene (EG) and matrix.

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