Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Universal filling

A very effective universal filling for vacuum desiccators is obtained by having concentrated sulphuric acid C in the bottom of the desiccator, and flake sodium hydroxide D in the inverted glass collar supported on the shoulders of the desiccator, the collar then being covered... [Pg.19]

My childhood interest in science arose from my desire to learn how the world works and from my passion for science fiction. As a teenager, one of my favorite science-fiction tales was Henry Hasse s He Who Shrank, originally published in 1936, which describes the exploration of subatomic universes filled with machine civilizations. Many scientists and science popularizers got kick-started in life by reading science fiction. [Pg.3]

In the micro method of combustion, substances containing any of these elements (N, S and halogen) can be combusted in one tube by the use of the so-called Universal Filling (see section on Micro-analysis, p. 453). [Pg.448]

We now see that the model inertial universe, with (23) as a global relationship, bears a close formal resemblance to a universe filled purely with Einsteinien photons—the difference is, of course, that the particles in the model inertial universe are assumed to be countable and to have mass properties. This formal resemblance means that the model inertial universe can be likened to a quasiphoton fractal gas universe. [Pg.330]

In other words, atoms are the basic stuff of nature, the primary and most foundational, and all of matter was built up of these primordial germs. The suggestion that the structure of atoms was hard (since they were indivisible) implied that atoms could not fill all space and there had to be regions that did not contain atoms. This would be like filling a jar with marbles. Where Aristotle and Plato objected to the very idea of a void, the Epicureans were comfortable with the idea, and it provided an easier way to describe motion. Since the void could not oppose motion, atoms were free to move about, while a universe filled with matter suggested that motion was unnecessarily complicated or might even be impossible. Lucretius went on to say ... [Pg.17]

Filling of these cavities with a nonpolar molecules is enthalpy driven. See Diederich, F. Smithrud, D. B. Sanford, E. M. Wyman, T. B. Ferguson, S. B. Carcanague, D. R. Chao, I. Houk, K. N. Acta Chem. Scand. 1992, 46, 205 and references cited therein See (a) Blokzijl, W. Ph. D. Thesis, University of Groningen, 1991 (b) Streefland, L. Ph. D. TTzewis, University of Gronirigen, 1998 and references cited therein. [Pg.170]

There are no universally accepted definitions of substitute dairy foods, which are referred to as imitations, simulates, substitutes, analogues, and mimics and are associated with terms such as filled, nondairy, vegetable nondairy, and artificial milk, cheese, etc. The term nondairy has been used indiscriminately to describe both imitation dairy products and products legally defined as not being imitation dairy products. Dairy substitutes can be divided into three types those in which an animal or vegetable fat has been substituted for milk fat those that contain a milk component, eg, casein [9000-71-9] or whey protein and those that contain no milk components (see Milk and milkproducts). The first two types make up most of the substitute dairy products. [Pg.438]

The second reason for modification of the displaced volume is that in real world application, the cylinder will not achieve the volumetric performance predicted by Equation 3.4. It is modified, therefore, to include empirical data. The equation used here is the one recommended by the Compressed Air and Gas Institute [1], but it is somewhat arbitrary as there is no universal equation. Practically speaking, however, there is enough flexibility in guidelines for the equation to produce reasonable results. The 1.00 in the theoretical equation is replaced with. 97 to reflect that even with zero clearance the cylinder will not fill perfectly. Term L is added at the end to allow for gas slippage past the piston rings in the various types of construction. If, in the course of making an estimate, a specific value is desired, use, 03 for lubricated compressors and. 07 for nonlubricated machines. These are approximations, and the exact value may vary by as much as an additional. 02 to. 03... [Pg.57]

Size exclusion chromatography (SEC, also known as GPC and GFC) has become a very well accepted separation method since its introduction in the late-1950s by works of Porath and Flodin (1) and Moore (2). Polymers Standards Service (PSS) packings for SEC/SEC columns share this long-standing tradition as universal and stable sorbents for all types of polymer applications. In general, PSS SEC columns are filled with spherical, macroporous cross-linked, pressure-stable, and pH-resistant polymeric gels. [Pg.267]

FIGURE 17.23 The mechanism of skeletal muscle contraction. The free energy of ATP hydrolysis drives a conformational change in the myosin head, resulting in net movement of the myosin heads along the actin filament. Inset) A ribbon and space-filling representation of the actin—myosin interaction. (SI myosin image courtesy of Ivan Rayment and Hazel M. Holden, University of Wiseonsin, Madison.)... [Pg.553]

In the first chapter, N. M. Ahmad and J. J. Li (Pfizer, Ann Arbor, USA) discuss the use of palladium in quinoline synthesis, thus filling an important gap in a recent monograph on the uses of palladium catalysis in heterocyclic synthesis authored by the same group. This is followed by an account of pyrimidine-pyridine interconversions by H. C. van der Plas (Wageningen University, The Netherlands) the immense variety of heterocyclic chemistry is illustrated by the large number of diverse strategies for such transformations. [Pg.357]

The entire observable universe, of which the Earth is a veiy tiny part, contains matter m the form of stars, planets, and other objects scattered in space, such as particles ol dust, molecules, protons, and electrons. In addition to containing matter, space also is filled with energy, part of it in the form of microwave radiation. [Pg.776]

The material that makes up the universe is known as matter. Matter is defined as any substance that occupies space and has weight. Matter exists in three states solid, liquid, and gas. Each has distinguishing characteristics. Solids have a defined volume and a definite shape. Liquids have a definite volume, but take the shape of their containing vessels. Gases have neither a definite shape nor volume. Gases not only take the shape of the containing vessel, but also expand to fill the vessel, regardless of its volume. Examples of the states of matter are iron, water, and air. [Pg.585]

One name, more than any other, is associated with the actinide elements Glenn Seaborg (1912-1999). Between 1940 and 1957. Seaborg and his team at the University of California, Berkeley, prepared nine of these elements (at no. 94-102) for the first time. Moreover, in 1945 Seaborg made the revolutionary suggestion that the actinides, like the lanthanides, were filling an f sublevel. For these accomplishments, he received the 1951 Nobel Prize in chemistry. [Pg.147]

The situation becomes most complicated in multicomponent systems, for example, if we speak about filling of plasticized polymers and solutions. The viscosity of a dispersion medium may vary here due to different reasons, namely a change in the nature of the solvent, concentration of the solution, molecular weight of the polymer. Naturally, here the interaction between the liquid and the filler changes, for one, a distinct adsorption layer, which modifies the surface and hence the activity (net-formation ability) of the filler, arises. Therefore in such multicomponent systems in the general case we can hardly expect universal values of yield stress, depending only on the concentration of the filler. Experimental data also confirm this conclusion [13],... [Pg.80]

WebAssign Online Homework System (alternative option to ChemPortal) Developed by instructors at North Carolina State University. WebAssign is filled with end-of-chapter problems, resources, and course management features. WebAssign has content experts on the premises to respond to any question within 24 hours. For more information visit www.webassign.net... [Pg.21]

The authors are thankful to Dr. P. Sadhukhan (Bridgestone/Firestone Research, Akron, OH) for different rubber samples Dr. T. Medintseva (the Semenov s Instimte of Chemical Physics, Moscow, Russia) for TPV samples Dr. N. Dutta (University of South Australia, Adelaide, Australia) for the samples of SEBS filled with oil Dr. Z. Petrovich (Kansas Polymer Research Center, Pittsburg State University, Pittsburg, KA) for PU samples, and NIST/ATP Award 70NANB4H3055 for financial support. [Pg.576]


See other pages where Universal filling is mentioned: [Pg.138]    [Pg.55]    [Pg.13]    [Pg.150]    [Pg.197]    [Pg.138]    [Pg.453]    [Pg.138]    [Pg.138]    [Pg.355]    [Pg.479]    [Pg.119]    [Pg.119]    [Pg.637]    [Pg.138]    [Pg.55]    [Pg.13]    [Pg.150]    [Pg.197]    [Pg.138]    [Pg.453]    [Pg.138]    [Pg.138]    [Pg.355]    [Pg.479]    [Pg.119]    [Pg.119]    [Pg.637]    [Pg.1912]    [Pg.124]    [Pg.57]    [Pg.137]    [Pg.86]    [Pg.1837]    [Pg.1954]    [Pg.430]    [Pg.406]    [Pg.7]    [Pg.1208]    [Pg.1209]    [Pg.701]    [Pg.856]    [Pg.195]    [Pg.654]    [Pg.8]    [Pg.150]    [Pg.7]   
See also in sourсe #XX -- [ Pg.448 ]




SEARCH



© 2024 chempedia.info