Ultrasonic is the universally accepted technique to study the physico-chemical properties of the liquids, liquid mixtures, electrolytic solutions and polymeric solutions. Liquids, liquid-mixtures and solutions find wide applications in medical, pharmaceutical, chemical, lather, textile, nuclear and solvent, solution related industries. The study and understanding of the thermodynamic properties of liquid mixtures and solutions are more essential for their applications in these industries. The measurements of ultrasonic velocity in the combination of density and viscosity have been used to study the molecular interactions in liquid mixtures and solutions.
Proteins are the linear macromolecules consisting of one or more chains of amino acids residue and having very complex structure. There are nearly about 20 amino acids which are building blocks of living organisms. Due to complex nature of proteins, direct study is not easily possible. So by studying the nature of amino acids and peptides; we can gain a large amount of information regarding proteins. Ultrasonic study of amino acids in aqueous solution of electrolytes or non- electrolytes provides useful information related to behavior of media. (M. K. Praharaj et. Al. scholar library). Electric field of the ion affects the stability of proteins.
The variation of ultrasonic velocity with concentration shows that interaction between solute and solvent. Ultrasonic propagation parameter yields valuable information regarding the behavior of liquid system, because intermolecular and intra-molecular association, dipolar interactions, complex formation and related structure changes affect the compressibility of liquid which produces variation in ultrasonic velocity.(S.C Bhatt applied phy...
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...nique is nonhazardous to operator and material that is tested.
• It is very accurate method in determining the reflector position and estimating size and shape.
• It is sensitive to both surface and surface discontinuities.
• Minimum part preparation is required.
• It is cost effective technique.
• Frequencies associated with relaxation phenomena fall within the range of ultrasonic therefore can be easily focused.
In the ultrasonic testing, high frequency sound waves are sent into a material by transducer. The sound waves travel through the material with some attenuation and also reflected at interfaces. The reflected or transmitted wave signal is converted into an electrical signal by same transducer. The reflected or transmitted wave signal is analyzed to determine the presence, size, location of flaws, wavelength and discontinuities.
Structure of the dipeptide:
As an ultrasound technician/sonographer I will have the ability to see dangerous defects within the human anatomy and begin a lifelong profession with many benefits. The Ultrasound was first invented in the early 1900’s and was surprisingly not used to produce photos of a fetus. In 1917 Paul Langen a marine life scientist used a form of ultrasound equipment in his attempt to detect submarines. After many failed attempts at using high frequency sound waves Dr. Ian Donald and his team in Glasgow, Scotland invented the first ultrasound machine in 1957. Dr. Donald even tested his machine on patients within a year of completing the invention, by the late 1950’s ultrasounds became routine in Glasgow hospitals.
...s the change in the temperature of both of these batches, 6°C for the pure, and 13°C for the crude. In this final sub-section of the Characterization of Aspirin, the values of absorbance were recorded. Initially, 0.0566 grams and 0.0590 grams of pure and crude Aspirin respectively were obtained and each individually placed into beakers (400 milliliter) and had 250.0 milliliters of distilled water added to them. From each beaker, a tiny amount of the just dissolved solutions was transferred to a cuvette, one cuvette for each type of aspirin. Each cuvette was placed into the ultraviolent spectroscopy mechanism which was connected to a computer and absorbance spectrum values were obtained at 298 nm (Figure 5) (0.1987 pure aspirin, and 0.9549 crude aspirin).
However, the measured densities lied below the accepted densities of 0.933 g/mL, 0.900 g/mL, and 0.888 g/mL for methyl acetate, ethyl acetate, and propyl acetate respectively. Refractive indices increased across all groups, including Group 6, from the methyl acetate sample to the propyl acetate sample just as expected from the theoretical refractive index values of the pure liquids. In addition, the refractive index % error calculations of Group 6 indicate that samples 1,3, and 5 produced refractive index values relatively close to the theoretical refractive indices of methyl acetate, ethyl acetate, and propyl acetate respectively. Although no distillation produces a perfectly pure liquid, the lack of relatively constant temperatures seen in the data and plots makes it unlikely that the samples collected by the class distillations had a high level of purity. Evaporation from the samples due to a lack of properly fitting test tube caps also reduced the usefulness of the density and refractive index calculations for determining the closeness of the obtained samples to the pure
This chapter provides some insight into pulse wave analysis and its relation to arterial diseases. The shape of the arterial pulse wave is an augmentation of the forward traveling wave with the reflected wave. The amount of wave reflection is dependent on the arterial wall properties such as arterial stiffness and is expressed in terms of Augmentation Index. This approach has been studied extensively using various measuring techniques, all of which have respective advantages and disadvantages. The purpose of PWA can be seen in the section describing the medical conditions that affect the wave shape. The discussion is included to assist the reader in understanding the purpose of pulse wave analysis.
than 9 square centimeters, was placed on the patient's chest at various angles. The transducer delivered ultrasound waves into the body and these
Ultrasounds have been a part of the medical world since the 1940s. The affects of acoustic vibrations on the body were studied as early as the 6th century. Then, ultrasound gained widespread acceptance as a therapeutic trea...
Unless you travel into the vacuum of space, sound is all around you every day.. You hear sounds; you don't touch them. But as the vibrations that sound creates in other objects. The idea that something so intangible can lift objects can seem unbelievable, but it's a real phenomenon.
A transducer is a mechanism that changes one form of energy to another form. A toaster is a transducer that turns electricity into heat; a loudspeaker is a transducer that changes electricity into sound. Likewise, an ultrasound transducer changes electricity voltage into ultrasound waves, and vice versa. This is possible because of the principle of piezoelectricity, which states that some materials (ceramics, quartz, and others) produce a voltage when deformed by an applied pressure. Conversely, piezoelectricity also results in production of a pressure whe...
Choosing this field is something that has a profound connection with my personal life. Becoming a Diagnostic Medical sonographer would mean that I have accomplished life long dream. Ever since I was a little, I always wanted to be in the medical field. I have always had a big heart and wanted to help people so when I saw the important role that sonographers play in the medical field, it became clear to me that being a sonographer was exactly what I want to do with my life. In 2007 someone who was very important to me passed away due to gastric cancer. When my grandmother, who was a mother, father, and a friend to me, was diagnosed with gastric cancer my world collapsed. It was devastating news, not only for me but also for the whole family.
Ultrasound Technicians are very valuable in the world of health care. Also known as Diagnostic Medical Sonographer, an Ultrasound Technician uses special machines and equipment that operates on sound waves to determine or diagnose medical problems for patients. There are specializations within this field in which some individuals explore. For instance, areas of specialization includes but not limited to; pregnancy, heart health, gynecology, and abdominal sonography. Although each specializing branch has its own distinctive function, they all involve probing the body to facilitate doctors with diagnoses.
By varying the thickness of the piezoelectric thin film, the phase velocity of the acoustic wave also will be varied. Fig. 5 shows the SAW velocity dispersion of the surface acoustic wave resonator for normalized thickness of ZnO piezoelectric material. There is a slight decrease of phase velocity at normalized thickness of ZnO between 0.35 to 0.95.The phase velocity increases with increasing of ZnO thickness at a range from 3150 m/s to 3650 m/s.
Proteins are considered to be the most versatile macromolecules in a living system. This is because they serve crucial functions in all biological processes. Proteins are linear polymers, and they are made up of monomer units that are called amino acids. The sequence of the amino acids linked together is referred to as the primary structure. A protein will spontaneously fold up into a 3D shape caused by the hydrogen bonding of amino acids near each other. This 3D structure is determined by the sequence of the amino acids. The 3D structure is referred to as the secondary structure. There is also a tertiary structure, which is formed by the long-range interactions of the amino acids. Protein function is directly dependent on this 3D structure.
Emulsions are important in food science. Not only do they provide an important sensory aspect in many foods, but a functional one as well. From hollandaise to ice cream, getting hydrophobic and hydrophilic molecules to play nice with each other can be a difficult task. According to Modern Cuisine, it was previously thought that Hollandaise, a classic French emulsion of egg and butter, could only be made by letting butter drip from natural heat of the hand. Of course, modern science has taught us that, with the use of emulsifiers, these mystic mixtures can be created without the voodoo and magic once thought necessary. This paper will discuss emulsions as applied to hollandaise, chocolate, hot dogs and their characteristic pH, moisture content, shelf stability and quality of viscosity. An explanation of the chemical processes that occur between the raw ingredients of each food and the relationship between the structure and function of their components will be explained, as well as the importance of the chemical changes that take place during production. The characteristics that define these foods as emulsions will be compared and contrasted to further elucidate the mystery of the emulsion. Bon Appetite!
...ticles pack closer together within the paste. Due to the viscosity and hence reduced flow of the binder through the interparticle spaces, the consolidation process is slowed down, effectively delaying any excessive ball growth. This research aims to investigate the granulation mechanisms involved in a high viscous detergent system in order to gain an understanding into how a high viscous binder is dispersed compared to a low viscous binder. This research would not be working with any low viscous binders and would be comparing research results with published work done on low viscous binder granulation systems. Most importantly, the research would focus on effects of process parameters such as binder injection point (literature on which has not been found) and granulation time as well as impeller speed and binder amounts (with considerably more literature published).
Produced sound from speakers has become so common and integrated in our daily lives it is often taken for granted. Living with inventions such as televisions, phones and radios, chances are you rarely ever have days with nothing but natural sounds. Yet, few people know the physics involved in the technology that allows us to listen to music in our living room although the band is miles away. This article will investigate and explain the physics and mechanism behind loudspeakers – both electromagnetic and electrostatic.