Fibre discrete

Other interesting directions are hardening with intermetallics, quasi-crystals, borides, silicides, discrete fibres, creation of natural composites. Conscious regulation of structure and properties of such materials requires studying phase equlibria in multi-component systems, in particular on the basis of light metals like aluminum, magnesium, titanium. The important direction is also a creation of specially organized porous structures. To some extent these directions are presented in a number of papers of the present book. 

Although the use of a discrete fibre and matrix has been shown to allow the construction of self-reinforced polymer composites either by using slightly different chemistries or by physical constraint to achieve the combination of fibre and matrix, other technologies have been presented in which self-reinforced polymer composites are created solely from the reinforcing phase without the addition of extra matrix material. These methods represent a very significant contribution to the field of self-reinforced polymer composites and are described in Sect. 2.7. 

As with conventional composites, when creating self-reinforced composites by combining discrete fibres and matrices such as by film and fibre stacking, various authors have also reported the surface pretreatment of the fibres to improve the interfacial properties of the composites [48, 51, 52]. However, details such as fibre preparation treatments and failure modes that dominate during specimen failure will not be presented in detail here. Instead, the focus of this review is the performance of the composite systems, and the reader is encouraged to consult the referenced literature for more details on the failure modes that dominate. 

A modified SIMCON system, called DUCON [42] was evaluated for overlay and floor applications. In this system the reinforcement consists of mat layers, rather than discrete fibres, allowing a better control of the reinforcement, as well as production of cages with cavities. 

Lemme XII 3.1. Il existe un anneau de valuation discrete 8, de caracte-ristique residuelle 0, et un schema abeiien A sur S = Spec(R), de dimension relative 2, dont la fibre speciale A possede un automorphisme... 

In multiphase filled polymer compositions, which may contain mixed filler types, combinations of fillers and fibres, or proportions of filler and a secondary modifying polymer, such as an elastomer, the spacial distribution of the phases has a direct bearing on the properties of the composite. In the case of the last mentioned system, the rubber may encapsulate the filler, be present as discrete droplets within the thermoplastic matrix or co-exist in both structural forms [80,81]. 

A further complication arises with this material in that the diffraction pattern is not a true fibre pattern. The molecular chain axis in the crystallites is tilted with respect to the fibre axis (2,3) and this causes reflections to be displaced above and below the mean layer line position. Thus it is possible that some reflectionswhich would overlap in a true fibre pattern to such an extent that their intensities could not be determined separately, might be resolved with the present material. When this happens for a reflection of observable intensity, then it will be measured as a discrete reflection and the resolution of the final structure will be higher than if the material had true fibre symmetry. However, Stambaugh et al (4)... 

It has been shown using DNA fibre autoradiography (Cairns, 1966, 1972) that in animal cells the synthesis of DNA occurs in discrete, short stretches or replicons (Huberman and Riggs, 1968). Replicons vary in size from 15-60 /am but are mostly less than 30 /im long in tissue culture cells (but see Callan, 1972). DNA synthesis is initiated in the middle of a replicon and proceeds bidirectionally to the ends of the replicon (Hand and Tamm, 1974). Later adjacent... 

A fibrillar type of boehmite (i.e. a du Pont product named Baymal colloidal alumina) was first described by Bugosh etal. (1962). The BET area was reported to be 275 m2g-1. The discrete boehmite fibres of about 5 ran diameter and 100 nm length were protected by adsorbed acetate groups and were thus easily dispersible. 

S qui suit l espace topologique sous-jacent a S est lf ensemble des points fermEs de S muni de la topologie discrete si s est un tel point feimE, le faisceau structural a pour fibre g en s le separe complete de Q, pour la topologie lineaire dEfinie par les ideaux de colongueur finie. 

Chole- Relating to the biliary system, cholestasis The failure of the normal bile flow to the intestine, causing cholestatic jaundice, cholinergic Nerve fibres that release ACETYLCHOLINE, cholinesterases Enzymes that hydrolyse choline esters, especially ACETYLCHOLINE of which there are two main forms acetylcholinesterase ( true cholinesterase ) is specific for acetylcholine, rapid in this action, and has a discrete distribution being especially located near cholinergic nerve terminals (and in erythrocytes) butyrylcholinesterase ( pseudo cholinesterase) is less selective and is able to hydrolyse some drugs (e.g. SUCCINYLCHOLINE CHLORIDE). Many drugs are known that inhibit the action of these enzymes. See anticholinesterases. chromatin A protein found in the nucleus which stains with basic dyes. It is used in the study of the behaviour of... 

Barnard, S. M. Walt, D. R., A fibre-optic chemical sensor with discrete sensing sites, Nature 1991,353, 338-340... 

The natural colour of animal fibre is closely related to the character of environment in which the animal lives [19]. Wool lots completely free of dark fibres do not exist [20]. In animal (and human) hair two kinds of pigments occur, namely eumelanin (responsible for black, dark brown and grey colours and commonly referred to as melanin) and pheomelanin (present in yellow, reddish-brown and red hair). Both are thought to be formed by different mechanisms and chemically differed [21]. Eumelanin is formed by enzymatic (tyrosinase) oxidation of tyrosine and polymerisation of several oxidation product [22]. Pheomelanin occurs in form of discrete grannules. Melanin grannules can occur in the cortex or in the cuticle. 

Nous pouvons supposer que S est le spectre d un anneau local arti-nien (EGA Ojjj 10.2.6 ), auquel cas G est aepare (Exp. VIg 5 2 ), done K est de type multiplicatif (Exp. IX 6.8 ) et a fortiori plat sur S. Prouvons maintenant que Ker u est ferm6 dans T, ce qui nous ramene au cas oil S est le spectre d un anneau de valuation discrete (EGA II 7 2. 1 ). Comme T est plat, k fibres connexes, u se factorise k travers la composante neutre de 1 adherence schemati-que dans G de la fibre generique de G. Nous pouvons done supposer G plat fibres connexes, mais alors G est separe (Exp. VLg 5.2 ), done K est fermd. Ceci dtant, il resulte do Exp. X 4.8 b)... 

S, spectre d un anneau de valuation discrete, fidelement plat sur S, de point ferm6 s et un sous-sch6ma en groupes C de Gg,, plat sur S, commutatif, a fibres connexes, tel que Cg) majors... 

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