Bifidobacteria Strain Behavior Toward Cholesterol: Coprecipitation with Bile Salts and Assimilation

Ambient pressure silica aerogel thin films have recently been prepared by exploiting reversible drying shrinkage caused by derivatization of the internal gel surface. Aerogels have porosities of upto 99.9% and due to the small size of the pores (few nanometers), large capillary stresses are produced in gels that are partially saturated with a wetting liquid. As a result of these capillary stresses, the flexible silica network undergoes strain which has been observed using environmental microscopy. This technique allows variation of the equilibrium vapor pressure and temperature, and a simultaneous monitoring of the deformation of the unconstrained film thickness. We have observed >600% deformation during the pore-filling and pore-emptying cycles. In this presentation, we discuss the unique stress-strain behavior of these films.Ref.: Sai S. Prakash, C. Jeffrey Brinker, Alan J. Hurd & Sudeep M. Rao, "Silica aerogel films prepared at ambient pressure by using surface derivatization to induce reversible drying shrinkage", Nature. Vol. 374, 30 March, 1995, 439-443.

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The Biological Importance of Bile Salts

Biochemical Society Transactions ◽

10.1042/bst0071323 ◽

1979 ◽

Vol 7 (6) ◽

pp. 1323-1323

Author(s):

H. DANIELSSON

Keyword(s):

Bile Salts ◽

Biological Importance

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Functional intravital two-photon based imaging of bile salts transport in cholestasis: mechanisms and consequences of bile infarcts formation

Zeitschrift für Gastroenterologie ◽

10.1055/s-0037-1612734 ◽

2018 ◽

Vol 56 (01) ◽

pp. E2-E89

Author(s):

A Ghallab ◽

U Hofmann ◽

N Vartak ◽

R Hassan ◽

P Godoy ◽

...

Keyword(s):

Bile Salts ◽

Two Photon

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Effect Of Elevated Temperatures On Complete Concrete Deformation Diagrams

Promyshlennoe i Grazhdanskoe Stroitel stvo ◽

10.33622/0869-7019.2019.11.09-14 ◽

2019 ◽

pp. 9-14

Keyword(s):

Experimental Data ◽

Elastic Modulus ◽

Elevated Temperatures ◽

Peak Load ◽

Relative Deformation ◽

Deformation Characteristics ◽

Compression Tests ◽

Strain Behavior ◽

Different Temperatures ◽

Deformation Diagrams

The analysis of the previous results of the study on concrete stress-strain behavior at elevated temperatures has been carried out. Based on the analysis, the main reasons for strength retrogression and elastic modulus reduction of concrete have been identified. Despite a significant amount of research in this area, there is a large spread in experimental data received, both as a result of compression and tension. In addition, the deformation characteristics of concrete are insufficiently studied: the coefficient of transverse deformation, the limiting relative compression deformation corresponding to the peak load and the almost complete absence of studies of complete deformation diagrams at elevated temperatures. The two testing chambers provided creating the necessary temperature conditions for conducting studies under bending compression and tension have been developed. On the basis of the obtained experimental data of physical and mechanical characteristics of concrete at different temperatures under conditions of axial compression and tensile bending, conclusions about the nature of changes in strength and deformation characteristics have been drawn. Compression tests conducted following the method of concrete deformation complete curves provided obtaining diagrams not only at normal temperature, but also at elevated temperature. Based on the experimental results, dependences of changes in prism strength and elastic modulus as well as an equation for determining the relative deformation and stresses at elevated temperatures at all stages of concrete deterioration have been suggested.

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Stress-strain behavior of reinforcing steel and concrete under seismic strain rates and low temperatures

Materials and Structures ◽

10.1617/13597 ◽

2005 ◽

Vol 34 (238) ◽

pp. 235-239 ◽

Cited By ~ 1

Author(s):

A. Filiatrault

Keyword(s):

Low Temperatures ◽

Strain Rates ◽

Reinforcing Steel ◽

Stress Strain ◽

Strain Behavior ◽

Seismic Strain

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Fatigue Investigation of Elastomeric Structures

Tire Science and Technology ◽

10.2346/1.3481658 ◽

2010 ◽

Vol 38 (3) ◽

pp. 194-212 ◽

Cited By ~ 11

Author(s):

Bastian Näser ◽

Michael Kaliske ◽

Will V. Mars

Keyword(s):

Fatigue Crack ◽

Fatigue Crack Growth ◽

Crack Growth ◽

Material Behavior ◽

Period Effect ◽

Numerical Representation ◽

Material Force ◽

Strain Behavior ◽

Dissipative Effects ◽

Elastomeric Materials

Abstract Fatigue crack growth can occur in elastomeric structures whenever cyclic loading is applied. In order to design robust products, sensitivity to fatigue crack growth must be investigated and minimized. The task has two basic components: (1) to define the material behavior through measurements showing how the crack growth rate depends on conditions that drive the crack, and (2) to compute the conditions experienced by the crack. Important features relevant to the analysis of structures include time-dependent aspects of rubber’s stress-strain behavior (as recently demonstrated via the dwell period effect observed by Harbour et al.), and strain induced crystallization. For the numerical representation, classical fracture mechanical concepts are reviewed and the novel material force approach is introduced. With the material force approach at hand, even dissipative effects of elastomeric materials can be investigated. These complex properties of fatigue crack behavior are illustrated in the context of tire durability simulations as an important field of application.

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