Molecular Dynamics of Auramine O in Low-Viscosity Solutions as Investigated by an Ultrafast Lensing Effect

1999 ◽  
Vol 103 (38) ◽  
pp. 7575-7579 ◽  
Author(s):  
Gen Furui ◽  
Kazuki Ito ◽  
Isao Tsuyumoto ◽  
Akira Harata ◽  
Tsuguo Sawada
Keyword(s):  
Molecular Dynamics ◽  
Viscosity Solutions ◽  
Low Viscosity ◽  
Auramine O ◽  
Lensing Effect

Influence of polyols and bulking agents on flavour release from low-viscosity solutions

2011 ◽  
Vol 129 (4) ◽  
pp. 1462-1468 ◽  
Author(s):  
Caroline Siefarth ◽  
Oxana Tyapkova ◽  
Jonathan Beauchamp ◽  
Ute Schweiggert ◽  
Andrea Buettner ◽  
...  
Keyword(s):  
Viscosity Solutions ◽  
Bulking Agents ◽  
Low Viscosity ◽  
Flavour Release

scholarly journals Molecular Dynamics Investigated by Temporally Two-Dimensional Coherent Raman Spectroscopy

1999 ◽  
Vol 19 (1-4) ◽  
pp. 35-40 ◽  
Author(s):  
A. Lau ◽  
M. Pfeiffer ◽  
V. Kozich ◽  
A. Kummrow
Keyword(s):  
Molecular Dynamics ◽  
Relaxation Time ◽  
Time Delays ◽  
Additional Contribution ◽  
Raman Resonance ◽  
Additional Information ◽  
Low Viscosity ◽  
Fast Relaxation ◽  
Coherent Raman ◽  
Set Up

A six-wave set-up is described to determine molecular dynamics in the condensed phase. Applying two independent time delays between excitation and probe pulses additional information on the dynamics should be obtainable. We show experimentally that such investigations can be carried out with noisy light having intensity fluctuations in the femtosecond region. As first result we found a fast relaxation time in neat nitrobenzene of 100 fs, becoming even faster in mixtures with low viscosity liquids. Switching on a Raman resonance yields a longer relaxation time, which could be explained by an additional contribution by that vibration.

A Smart Interface for Reliable Intradermal Injection and Infusion of High and Low Viscosity Solutions

2010 ◽  
Vol 28 (3) ◽  
pp. 647-661 ◽  
Author(s):  
Michael Vosseler ◽  
Michael Jugl ◽  
Roland Zengerle
Keyword(s):  
Viscosity Solutions ◽  
Intradermal Injection ◽  
Low Viscosity

Capillary viscometer for evaluating low‐viscosity solutions at elevated temperatures

1986 ◽  
Vol 57 (9) ◽  
pp. 2310-2314 ◽  
Author(s):  
D. B. Cunningham ◽  
P. H. Doe ◽  
S. D. Joshi ◽  
A. Moradi‐Araghi
Keyword(s):  
Viscosity Solutions ◽  
Elevated Temperatures ◽  
Capillary Viscometer ◽  
Low Viscosity

Rotational depolarization of fluorescence in low-viscosity solutions

1993 ◽  
Vol 97 (15) ◽  
pp. 3668-3670 ◽  
Author(s):  
R. Alicki ◽  
M. Alicka ◽  
A. Kubicki
Keyword(s):  
Viscosity Solutions ◽  
Low Viscosity ◽  
Rotational Depolarization

scholarly journals  Effect of thickening agents on perceived viscosity  and acidity of model beverages

2012 ◽  
Vol 30 (No. 5) ◽  
pp. 442-445 ◽  
Author(s):  
Z. Panovská ◽  
A. Váchová ◽  
J. Pokorný
Keyword(s):  
Viscosity Solutions ◽  
Carboxymethyl Cellulose ◽  
Kinematic Viscosity ◽  
Xanthan Gum ◽  
Methyl Cellulose ◽  
High Viscosity ◽  
Sodium Carboxymethyl Cellulose ◽  
Hydroxyethyl Cellulose ◽  
Low Viscosity ◽  
Thickening Agents

The effect of thickening agents &ndash; methyl cellulose, hydroxyethyl cellulose, sodium carboxymethyl cellulose, and xanthan gum &ndash; solutions on the sensory viscosity was investigated in the concentration range of 0&ndash;0.8%. The perceived viscosity was proportional to the logarithm of kinematic viscosity in the presence of citric and malic acids. The viscosity was inversely proportional to the acidity at the viscosity levels higher than 10 mm<sup>2</sup>/s. A liquid of high viscosity thus possess lower acidity than aqueous or low-viscosity solutions. No significant differences were found between the effects of different thickening agents. &nbsp;

scholarly journals 3D Printing of a Reactive Hydrogel Bio-Ink Using a Static Mixing Tool

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1986 ◽  
Author(s):  
María Puertas-Bartolomé ◽  
Małgorzata K. Włodarczyk-Biegun ◽  
Aránzazu del Campo ◽  
Blanca Vázquez-Lasa ◽  
Julio San Román
Keyword(s):  
3D Printing ◽  
Viscosity Solutions ◽  
Structural Integrity ◽  
Cell Types ◽  
High Viscosity ◽  
Soft Tissue Regeneration ◽  
Low Viscosity ◽  
Good Shape ◽  
Wide Range

Hydrogel-based bio-inks have recently attracted more attention for 3D printing applications in tissue engineering due to their remarkable intrinsic properties, such as a cell supporting environment. However, their usually weak mechanical properties lead to poor printability and low stability of the obtained structures. To obtain good shape fidelity, current approaches based on extrusion printing use high viscosity solutions, which can compromise cell viability. This paper presents a novel bio-printing methodology based on a dual-syringe system with a static mixing tool that allows in situ crosslinking of a two-component hydrogel-based ink in the presence of living cells. The reactive hydrogel system consists of carboxymethyl chitosan (CMCh) and partially oxidized hyaluronic acid (HAox) that undergo fast self-covalent crosslinking via Schiff base formation. This new approach allows us to use low viscosity solutions since in situ gelation provides the appropriate structural integrity to maintain the printed shape. The proposed bio-ink formulation was optimized to match crosslinking kinetics with the printing process and multi-layered 3D bio-printed scaffolds were successfully obtained. Printed scaffolds showed moderate swelling, good biocompatibility with embedded cells, and were mechanically stable after 14 days of the cell culture. We envision that this straightforward, powerful, and generalizable printing approach can be used for a wide range of materials, growth factors, or cell types, to be employed for soft tissue regeneration.

The Use of Styrenes as Embedding Media for Electron Microscopy

1971 ◽  
Vol 29 ◽  
pp. 488-489
Author(s):  
Edward D. De-Lamater ◽  
Eric Johnson ◽  
Thad Schoen ◽  
Cecil Whitaker
Keyword(s):  
Electron Microscopy ◽  
Surface Tension ◽  
Ultraviolet Light ◽  
Methyl Ethyl Ketone Peroxide ◽  
Methyl Ethyl ◽  
Styrene Polymerization ◽  
Radical Initiation ◽  
Tertiary Butyl ◽  
Low Viscosity ◽  
Free Radical Initiation

Monomeric styrenes are demonstrated as excellent embedding media for electron microscopy. Monomeric styrene has extremely low viscosity and low surface tension (less than 1) affording extremely rapid penetration into the specimen. Spurr's Medium based on ERL-4206 (J.Ultra. Research 26, 31-43, 1969) is viscous, requiring gradual infiltration with increasing concentrations. Styrenes are soluble in alcohol and acetone thus fitting well into the usual dehydration procedures. Infiltration with styrene may be done directly following complete dehydration without dilution.Monomeric styrenes are usually inhibited from polymerization by a catechol, in this case, tertiary butyl catechol. Styrene polymerization is activated by Methyl Ethyl Ketone peroxide, a liquid, and probably acts by overcoming the inhibition of the catechol, acting as a source of free radical initiation.Polymerization is carried out either by a temperature of 60°C. or under ultraviolet light with wave lengths of 3400-4000 Engstroms; polymerization stops on removal from the ultraviolet light or heat and is therefore controlled by the length of exposure.

Some quantitative applications of vascular corrosion casting

1992 ◽  
Vol 50 (1) ◽  
pp. 738-739
Author(s):  
Fred E. Hossler
Keyword(s):  
Blood Vessels ◽  
Nuclear Orientation ◽  
Three Dimensional ◽  
Surrounding Tissue ◽  
Confocal Laser ◽  
Corrosion Casting ◽  
Venous Valve ◽  
Casting Technique ◽  
Low Viscosity ◽  
Quantitative Measurements

Preparation of replicas of the complex arrangement of blood vessels in various organs and tissues has been accomplished by infusing low viscosity resins into the vasculature. Subsequent removal of the surrounding tissue by maceration leaves a model of the intricate three-dimensional anatomy of the blood vessels of the tissue not obtainable by any other procedure. When applied with care, the vascular corrosion casting technique can reveal fine details of the microvasculature including endothelial nuclear orientation and distribution (Fig. 1), locations of arteriolar sphincters (Fig. 2), venous valve anatomy (Fig. 3), and vessel size, density, and branching patterns. Because casts faithfully replicate tissue vasculature, they can be used for quantitative measurements of that vasculature. The purpose of this report is to summarize and highlight some quantitative applications of vascular corrosion casting. In each example, casts were prepared by infusing Mercox, a methyl-methacrylate resin, and macerating the tissue with 20% KOH. Casts were either mounted for conventional scanning electron microscopy, or sliced for viewing with a confocal laser microscope.

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