On the Properties of Things

These extracts will illustrate the style of treatment of such subjects and the care with which he quotes the authorities for his statements. The scope of the work is well described by its title On The Properties of Things. 

Bartholomew was one of the first great encyclopaedists, whose work l)e Proprietatibus Rerum (On the Properties of Things) was an attempt to assimilate the new learning that was coming out of Spain as a result of the work of translators such as Robert of Chester. He appears to have studied under Robert Grosseteste, the Bishop of Lincoln, and may therefore have known Roger Bacon. 

Bartholomaeus Anglicus, De Proprietatibus Rerum (c.1230), in On the Properties of Things, trans. John Trevisa (Oxford Clarendon Press, 1975[1389]), 129. 

Phase diagrams are important. Whenever materials engineers have to report on the properties of a metallic alloy, or a ceramic, the first thing they do is reach for the phase diagram. It tells them what, at equilibrium, the structure of the alloy or ceramic is. The real structure may not be the equilibrium one, but equilibrium structure gives a base line from which other (non-equilibrium) structures can be inferred. 

The physical properties of substances these depend on the properties of individual molecules and on how the molecules interact in the bulk material. For example, the strength and melting point of a polymer (e.g. a plastic) depend on how well the molecules fit together and on how strong the forces between them are. People who investigate things like this work in the field of materials science. 

What would be the utility of such machines Who knows Of course, a small automobile would only be useful for the mites to drive around in, and I suppose our Christian interests don t go that far. However, we did note the possibility of the manufacture of small elements for computers in completely automatic factories, containing lathes and other machine tools at the very small level. The small lathe would not have to be exactly like our big lathe. I leave to your imagination the improvement of the design to take full advantage of the properties of things on a small scale, and in such a way that the fully automatic aspect would be easiest to manage. 

Table 1 lists the different membrane polymers available and the advantages and disadvantages, which depend on the properties of the polymer. The table shows that there is no such thing as a membrane polymer for every application. Therefore, filter membranes and the filter performance have to be tested before choosing the appropriate filter element. 

Liquid solutions are clear and transparent with no visible particles of solute. They may be colored or colorless, depending on the properties of the solute and solvent. Note that the terms clear and colorless do not mean the same thing a clear solution has only one state of matter that can be detected colorless simply means the absence of color. 

The important thing to notice about this equation is that nothing in the integral depends on the properties of a specific fluid, so that when the integral is evaluated using the corresponding-states equation of state, the result will be applicable to all corresponding-states fluids. 

The considered radial process in the bentonite annulus is a complicated one with coupled, highly nonlinear flows that involve many things. There are liquid flow and vapor flow as well as conductive and convective heat flow depending on gradients in pressure, water vapor density and temperature. The flow coefficients depend on water properties such as saturation water vapor pressure and dynamic viscosity of water. They also depend on the properties of bentonite water retention curve, hydraulic conductivity and water vapor diffusion coefficient, and thermal conductivity, all of which are functions of degree of water saturation. 

The discussion thus far is for periodic lattices in which all atoms have the same environment. For many materials simulations, we are interested in the properties of things like surfaces and defects around which atomic bonding environments can differ from atom to atom. It is therefore desirable to apply the same ideas locally to each atom. To do this, a local density of states dj(e) can be defined for each atom i in which the contribution of each molecular orbital is weighted by the amount of the orbital on the atom. If an orbital has a node on a partic-... 

Book of the Properties of Things consists of 19 volumes and used Greek, Jewish, and Arabic sources. Bartholomew reported on the Aristotelian theory of the elements along with the sulfiir-mercury theory of the Arabs. He also reported that transmutation was possible— just very hard to achieve. 

Apparently many features of the biological systems could be understandable based on the properties of the macromolecular polysaccharide components and their relative biochemistry. Based on the known physico-chanical properties of HA we can try to understand its role in the biological evolution of the species. Or, in other words, we will try to determine when and how HA arrived on the life tree and what new things it has introduced to the process of evolution according to its physico-chemical and physiological properties. 

UDP-glucuronyltransferase from hepatic microsomes has several properties in common with G-6-Pase (Zakim, 1970 Vessey and Zakim, 1971 Zakim and Vessey, 1971). Because of its apparent similarity to G-6-Pase, the effects of treatment with phospholipases A and C on the properties of UDP-glucuronyltransferase, assayed with p-nitrophenol as acceptor substrate, have been examined in this laboratory, in order to determine, among other things, whether the results for G-6-Pase are a general property of tightly-bound microsomal enzymes, and, if so, to determine the extent to which there is selectivity in the effects of phospholipases on microsomal enzyme properties. 

Structure determines properties and the properties of atoms depend on atomic struc ture All of an element s protons are m its nucleus but the element s electrons are dis tributed among orbitals of varying energy and distance from the nucleus More than any thing else we look at its electron configuration when we wish to understand how an element behaves The next section illustrates this with a brief review of ionic bonding... 

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