Track topics on Twitter Track topics that are important to you
The intrinsic property of liquids is a vital indicator of formulation performance and stability. Therefore, investigation of the interfacial phenomenon of surface tension is a routine procedure in the development of products in a wide variety of areas including foods, pharmaceuticals, cosmetics, and painting technologies. We hypothesize that studies related to the maximum pull on a rod can be extrapolated to disk geometry and applied to measure surface tension using a texture analyzer. A glass disk probe was attached to the arm of a texture analyzer and pulled from the liquid surface. The maximum force of detachment was used to calculate surface tension extrapolating from the theory of maximum pull on a rod. The surface tension of water, ethanol, and a hydroalcoholic solution was measured and compared with literature values to validate this hypothesis. The calculated values of surface tension for the liquids studied were within 5% of the reported values. Probe diameter appears to have an important role on surface tension accuracy compared with literature values. Slight discrepancies can be attributed to temperature control and leveling of liquid surface, although still in accordance with the reported values of surface tension measured using different methods. This study presents a simple, precise, and quick method to determine the surface tension of liquids from the maximum pull on a disk. Further studies are warranted to determine the optimum glass disk probe diameter for better accuracy.
Division of Pharmaceutics, College of Pharmacy, The University of Texas at Austin, 2409 University Ave. PHR 4.214, Austin, Texas, 78712-1095, USA.
This article was published in the following journal.
Name: AAPS PharmSciTech
A Fabry-Perot (FP) cavity, formed by a single-mode fiber (SMF) fusion spliced with a section of hollow fiber, was proposed and experimentally used as a sensor for liquid surface tension measurement. D...
ABSTRACT With the use of the isothermogravimetrical analysis, the enthalpy of vaporization, glHom(Tav), at the average temperature, Tav = 445.65 K, for the ionic liquids (ILs), 1-alkyl-3-methylimid...
Six novel siloxane-based surface-active ionic liquids (SAILs) - siloxane ammonium carboxylate [Si(n)N(2)-CA(1), (n=3, 4)] - were designed and synthesized. Their melting points, surface activities and ...
The shear viscosity of a variety of strongly interacting quantum fluids, ranging from ultracold atomic Fermi gases to quark-gluon plasmas, can be accurately measured. On the contrary, no experimental ...
Liquid retention in micron and millimeter scale devices is important for maintaining stable interfaces in various processes including bimolecular separation, phase change heat transfer, and water desa...
The objective of this report is to describe a new surgical technique for the treatment of bony mallet finger which involves the application of both Kirschner wire and pull-out wire fixatio...
The study HIPPOCRATE is a prospective open comparative study with a control group. The objective of this study is to show that an optimization of the caring of non controlled hypertended ...
The Kinesio Taping (KT ) method was developed more than thirty years ago in order to cause sensory effects through the epidermis and dermis, generating a variety of physiological effects i...
Glaucoma is one of the most common causes of blindness in the industrialized nations. For a long time glaucoma has been defined as a disease in which high intraocular pressure (IOP) leads ...
In this study we intend to find out the pattern of biofilm accumulation in vivo on various surface finishings. Our intention is to prepare Polymethylmetacrylate squers on orthodontical br...
Reducing the SURFACE TENSION at a liquid/solid interface by the application of an electric current across the interface thereby enhancing the WETTABILITY of the surface.
Measurement of the pressure or tension of liquids or gases with a manometer.
A method where a culturing surface inoculated with microbe is exposed to small disks containing known amounts of a chemical agent resulting in a zone of inhibition (usually in millimeters) of growth of the microbe corresponding to the susceptibility of the strain to the agent.
The force acting on the surface of a liquid, tending to minimize the area of the surface. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
The application of high intensity ultrasound to liquids.
Latest News Clinical Trials Research Drugs Reports Corporate
Pharmacy is the science and technique of preparing as well as dispensing drugs and medicines. It is a health profession that links health sciences with chemical sciences and aims to ensure the safe and effective use of pharmaceutical drugs. The scope of...