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Thursday, July 30, 2020 | History

4 edition of Ultrasound and hydrophobic interactions in solutions found in the catalog.

Ultrasound and hydrophobic interactions in solutions

Ants Tuulmets

Ultrasound and hydrophobic interactions in solutions

by Ants Tuulmets

  • 127 Want to read
  • 36 Currently reading

Published by Nova Science Publishers in Hauppauge, N.Y .
Written in English


Edition Notes

Includes index.

StatementAnts Tuulmets, Siim Salmar and Jaak Järv
ContributionsSalmar, Siim, Järv, Jaak
Classifications
LC ClassificationsQD541 .T88 2010
The Physical Object
Paginationp. cm.
ID Numbers
Open LibraryOL24422694M
ISBN 109781617611759
LC Control Number2010028621
OCLC/WorldCa650504357

Each one of its haem groups can carry up to four oxygen molecules. The primary sequences of the alpha and beta subunits are close to identical. Oxygen binds with high affinity in the T state form. The haem groups are heigl in place mainly by hydrophobic interactions with the globin parts.   Abstract. We present here a brief review of direct force measurements between hydrophobic surfaces in aqueous solutions. For almost 70 years, researchers have attempted to understand the hydrophobic effect (the low solubility of hydrophobic solutes in water) and the hydrophobic interaction or force (the unusually strong attraction of hydrophobic surfaces and .

The solution was then cooled to room temperature, mixed with μL H 2 O 2 (Thermo Fisher) and heated to °C for 30 minutes. The solution was then cooled to room temperature and mixed with mL of DI water and mL of % ammonium molybdate (VI) tetrahydrate solution. The solution was then vortexed and mixed with mL of 10% L. Hydrophobic interactions Retention of organic analytes from polar solutions (e.g. water) onto these SPE materials is due primarily to the attractive forces between the carbon-hydrogen bonds in the analyte and the functional groups on the silica surface. These nonpolar-nonpolar.

DeepDyve is the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Hydrophilic ionic liquids are often used to extract the active ingredients of medicinal plants, while hydrophobic ionic liquids are rarely used to directly extract solid samples. In this paper, a simple, novel and efficient temperature-controlled hydrophobic ionic liquids-based ultrasound/heating-assisted extraction (TC-ILs-UHAE) procedure coupled with high-performance liquid chromatography.


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Ultrasound and hydrophobic interactions in solutions by Ants Tuulmets Download PDF EPUB FB2

If capable to break the interaction with hydrophobic interior of the cluster, ultrasound accelerates the reaction. In our recent work [6] ethyl, n -propyl, and n -butyl acetates were used as probes of the inclusion of a reagent in the by: 5. The retardation effect of ultrasound gradually decreases up to 45 wt% ethanol content.

We report an evidence of ultrasonic retardation of reactions and thereby a direct evidence for sonochemical processes in the bulk solution. Ultrasound can disturb solvation of the species in the by: 5. Impact of ultrasound on hydrophobic interactions in solutions: Ultrasonic retardation of benzoin condensation Article in Ultrasonics Sonochemistry 14(4) May with 16 Reads.

Read "ChemInform Abstract: Ultrasound and Hydrophobic Interactions in Solutions, ChemInform" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. ChemInform Abstract: Ultrasound and Hydrophobic Interactions in Solutions Article in ChemInform 43(44) October with 11 Reads How we measure 'reads'.

Impact of Ultrasound on Hydrophobic Interactions in Solutions. View/ Open. (Kb) Date Author. Hagu, Hannes. Metadata Impact of Ultrasound on Hydrophobic Interactions in Solutions.

View/ Open. (Kb) Date Author. Hagu, Hannes. Metadata Show full item record. URI. Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): (external link) http. Impact of ultrasound on hydrophobic interactions in solutions: ultrasonic relation of benzoin condensation.

Ultrasonics Sonochemistry, 14 (4), − /ch Publikatsiooni tüüp. Causes of Hydrophobic Interactions. American chemist Walter Kauzmann discovered that nonpolar substances like fat molecules tend to clump up together rather than distributing itself in a water medium, because this allow the fat molecules to have minimal contact with water.

The image above indicates that when the hydrophobes come together, they will have less contact with water. Ultrasound affects hydrophobic interactions with the solvent, which are not manifested in conventional kinetics. When it suppresses the stabilization of the encounter complexes between reagents, sonication hinders the reaction but accelerates it when it perturbs the hydrophobic stabilization of the ground state of a reagent.

This study aimed to compare the effects of high intensity ultrasound (HIU) applied at various amplitudes (20~40%) and for different durations (1~10 min) on the physiochemical and structural properties of goat milk β-lactoglobulin.

No significant change was observed in the protein electrophoretic patterns by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). They have hydrophobic carbon tails and hydrophilic head groups. Because the carbon chains are repulsed by water, phospholipids come together so that their carbon tails are touching and the polar heads face out in either direction.

These hydrophobic interactions ultimately form a. My personal involvement with the problem of hydrophobic interactions (HI) began about ten years ago. At that time I was asked to write a review article on the properties of aqueous solutions of nonpolar solutes.

While surveying the literature on this subject I found numerous discussions of the concept of HI. A series of contemporary techniques, used for SWCNTs solubilization, from physical (classic ultrasound (stable and inertial cavitation types of ultrasonic treatment are emphasized), radiation treatment or UV and visible light influence) to chemical and biological, applying inorganic (nanodiamonds, iodine, metallic sodium in liquid ammonia, peroxides, and mineral acids) and organic (acids.

These effects have been explained by the influence of ultrasound on specific solute-solvent interactions of hydrophobic nature that are not manifested in conventional reaction kinetics [].

Moreover, we were able to show that in these cases the sonochemical effects can be related to the destruction of hydrophobic solute-solvent interactions.

Ultrasound-assisted extraction method is environmentally friendly method, less risk of chemistry and physics, and less impact on molecular structural properties of tannins in plants [44, 45].

In the last decade, numerous publications on the use of ultrasound in active tannin extraction have been found. For this reason the symposium "Ultrasound Interaction in Biology and Medicine," initiated and supported by the "International Organization of Medical Physics," took place.

Soft Tissue Simulation in Ultrasonic Diagnosis Using Cross-Linked Hydrophobic Gels. Book Title Ultrasound Interactions in Biology and Medicine Editors. Russell. Books. Study. Textbook Solutions Expert Q&A Study Pack Practice Learn.

Writing. Flashcards. Math Solver. Internships. Test Prep. Hydrophobic interactions Explanation Though, it appears like covalent bonding interaction at the first sight, it's net result is hydrophobic interaction.

The Influence of Ultrasound on Matrix-Bound Enzymes.- Electrokinetic Properties of Isolated Cells Exposed to Low Levels of Ultrasound.- Interactions of Ultrasound with Platelets and the Blood Coagulation System.- Haemolysis of Red Blood Cells In Vitro and In Vivo by Ultrasound at MHz and at Therapeutic Intensity Levels   Degree of Glycation (DG) The slightly modified o-phthaldialdehyde (OPA) assay was used to measure the free amino groups [].

1 mL OPA (40 mg) methanol solution, 25 mL Na 2 B 4 O 7 solution ( mM), mL 20% (w/v) SDS and μL β-mercaptoethanol were mixed and diluted to 50 mL by distilled water to obtain the OPA4 mL OPA reagent was mixed with μL.

Fresh water is one of the main sources for drinking water production. Due to increasing contamination caused by extreme weather events such as flood and drought as well as urbanization activities, the quality of this source continues to deteriorate.

In order to maintain producing high-quality water from heavily contaminated sources, more chemicals are added to water in conventional .The hydrophobic interaction plays a critical role in a wide range of molecular phenomena in numerous biological and engineering systems.

Using a Surface Forces Apparatus (SFA) coupled with a top-view optical microscope, we have directly measured and visualized the interactions between two polystyrene surfaces in different electrolyte solutions (i.e., NaCl, CaCl 2, HCl and CH 3 COOH).Propagation of Ultrasound in Solutions of Biological Substances.

A. P. Sarvazyan. Pages About this book. The methods of investigation, theoretical considerations and results concerning the interaction of ultrasound on molecular, cellular and system levels contained herein will remain up-to-date for a long time to come.