Ernst A. Hauser

Bio: Ernst A. Hauser is an academic researcher from Massachusetts Institute of Technology. The author has contributed to research in topics: Natural rubber & Vulcanization. The author has an hindex of 14, co-authored 83 publications receiving 656 citations. Previous affiliations of Ernst A. Hauser include Worcester Polytechnic Institute.

Color reactions between clays and amines.

Abstract: The formation of colored compounds on clay has been shown to be the result of a reaction between clay and aromatic amines. The influence of various substituents, acid and bases, is discussed. A preliminary hypothesis explaining the mechanism of the reaction is advanced and further work outlined.

Effect of hyaluronidase on urine and its possible significance in renal lithiasis.

Abstract: In 1950, one of us (A. J. B.) observed that subcutaneous injections of hyaluronidase (wydase®), mixed with isotonic sodium chloride solution, resulted in clearing of urine in patients who previously had turbid urine with much sedimentation. The effect of hyaluronidase was manifest within 30 minutes after injection and persisted for 24 to 72 hours. 1 In attempting to establish a mechanism by which hyaluronidase produces this effect, we examined urines under a microscope equipped with a standard dark-field condenser to ascertain whether hyaluronidase caused a change in the colloid chemical condition of the urine under investigation. Preliminary observations appeared to establish a correlation between the injection of hyaluronidase and the number of colloidal particles discernible in the urine sample. Certain colloidal phenomena (e. g., adhesion) made the statistical validity of this method questionable. In addition, considerable dispute as to the significance of such examination is already apparent. Since that time,

A new tool for determination of the stage of polymerization of thermosetting polymers

Abstract: Studies of the change of attenuation and velocity of longitudinal ultrasonic waves with proceeding polymerization of thermosetting plastics have revealed that this new technique may permit rapid determination of the stage of polymerization under various conditions. The ultrasonic equipment used for these tests is described in detail. On the basis of results so far obtained, future possibilities for the application of this new technique in studying polymerization reactions are outlined.

Metal pollution in the aquatic environment

Abstract: Aquatic chemistry is becoming both a rewarding and substantial area of inquiry and is drawing many prominent scientists to its fold. Its literature has changed from a compilation of compositional tables to studies of the chemical reactions occurring within the aquatic environments. But more than this is the recognition that human society in part is determining the nature of aquatic systems. Since rivers deliver to the world ocean most of its dissolved and particulate components, the interactions of these two sets of waters determine the vitality of our coastal waters. This significant vol ume provides not only an introduction to the dynamics of aquatic chem istries but also identifies those materials that jeopardize the resources of both the marine and fluvial domains. Its very title provides its emphasis but clearly not its breadth in considering natural processes. The book will be of great value to those environmental scientists who are dedicated to keeping the resources of the hydrosphere renewable. As the size of the world population becomes larger in the near future and as the uses of materials and energy show parallel increases, the rivers and oceans must be considered as a resource to accept some of the wastes of society. The ability of these waters and the sediments below them to accommodate wastes must be assessed continually. The key questions relate to the capacities of aqueous systems to carry one or more pollutants."

Small particles, big impacts: A review of the diverse applications of nanofluids

Abstract: Nanofluids—a simple product of the emerging world of nanotechnology—are suspensions of nanoparticles (nominally 1–100 nm in size) in conventional base fluids such as water, oils, or glycols. Nanofluids have seen enormous growth in popularity since they were proposed by Choi in 1995. In the year 2011 alone, there were nearly 700 research articles where the term nanofluid was used in the title, showing rapid growth from 2006 (175) and 2001 (10). The first decade of nanofluid research was primarily focused on measuring and modeling fundamental thermophysical properties of nanofluids (thermal conductivity, density, viscosity, heat transfer coefficient). Recent research, however, explores the performance of nanofluids in a wide variety of other applications. Analyzing the available body of research to date, this article presents recent trends and future possibilities for nanofluids research and suggests which applications will see the most significant improvement from employing nanofluids.

Porcelain—Raw Materials, Processing, Phase Evolution, and Mechanical Behavior

Abstract: Porcelain represents the foundation of the ceramics discipline and one of the most complex ceramic materials. Composed primarily of clay, feldspar, and quartz, porcelains are heat-treated to form a mixture of glass and crystalline phases. This review focuses on raw materials, processing, heat treatment, and mechanical behavior. Because of the complexities of the porcelain system and despite the substantial amount of research already conducted within the field, there remain significant opportunities for research and study, particularly in the areas of raw material understanding, processing science, and phase and microstructure evolution.

Ceramics for the archaeologist

Abstract: This book describes the chemical and physical characteristics of ceramic materials and processes and evaluates methods of analysis and description in terms of archaeological objectives. Sections are devoted to the composition, sources and properties of ceramic materials, the techniques of prewheel potters, methods of analysis and description, and problems of pottery classification. Glossary and bibliography. -- ICCROM

A review on preparation, characterization, properties and applications of nanofluids

Abstract: Selection of suitable heat transfer fluid for heat dissipation is an important consideration in the design of heat exchanging systems. Nanofluid, a colloidal mixture made of a base fluid and a nanoparticle, is a new generation of heat transfer fluids becoming a high potential fluid in heat transfer applications due to enhanced thermal conductivity. Research studies about nanofluids are on the rise owing to the mounting interest and demand for nanofluids as heat transfer fluids in a wide variety of applications. Recently, nanofluid technology has a new dimension of impregnating two or more nanoparticles in base fluids, namely hybrid or composite nanofluids. This paper reviews the preparation of metal and metal oxides nanofluids and hybrid nanofluids and the various techniques used to study the physical and chemical characteristics of nanofluids. Thermo-physical and heat transfer properties of nanofluids including the improved thermal conductivity, viscosity and specific heat models for nanofluids are presented. Finally, various application areas of nanofluids, such as transportation, electronic cooling, energy storage, mechanical applications etc. are discussed.