Black secondary

Fig. 2 Expectation values of primary (black), secondary (red) and external functions (olive) as function of LiF bond length. The PCI energy curve (blue dashed, right ordinate) and ionic-covalent transition point are included for reference...

Secondary hyphae are red. Secondary hyphae are yellow. Secondary hyphae are green. Secondary hyphae are blue. Secondary hyphae are violet. Secondary hyphae are white. Secondary hyphae are black. Secondary hyphae are gray. 

The nitrosamines are insoluble in water, and the lower members are liquid at ordinary temperatures. The separation of an oily liquid when an aqueous solution of an amine salt is treated with sodium nitrite is therefore strong evidence that the amine is secondary. Diphenylnitrosoamine is selected as a preparation because it is a crystalline substance and is thus easier to manipulate on a small scale than one of the lower liquid members. For this preparation, a fairly pure (and therefore almost colourless) sample of diphenyl-amine should be used. Technical diphenylamine, which is almost black in colour, should not be employed. 

The most important parameter that affects the resistivity is the amount of carbon black particles, and of secondary importance is the type and especially the shape of the carbon black particles. The susceptibiUty of the carbon black to oxidation may possibly lead to high resistivity of insulation shields. The type of polymer used in a semiconducting material is also an important parameter that can affect resistivity. 

Pyrolusite is a black, opaque mineral with a metallic luster and is frequendy soft enough to soil the fingers. Most varieties contain several percent water. Pyrolusite is usually a secondary mineral formed by the oxidation of other manganese minerals. Romanechite, a newer name for what was once known as psilomelane [12322-95-1] (now a group name) (7), is an oxide of variable composition, usually containing several percent water. It is a hard, black amorphous material with a dull luster and commonly found ia the massive form. When free of other oxide minerals, romanechite can be identified readily by its superior hardness and lack of crystallinity. 

When nickel hydroxide is oxidized at the nickel electrode in alkaline storage batteries the black trivalent gelatinous nickel hydroxide oxide [12026-04-9], Ni(0H)0, is formed. In nickel battery technology, nickel hydroxide oxide is known as the nickel active mass (see Batteries, secondary cells). Nickel hydroxide nitrate [56171-41-6], Ni(0H)N02, and nickel chloride hydroxide [25965-88-2], NiCl(OH), are frequently mentioned as intermediates for the production of nickel powder in aqueous solution. The binding energies for these compounds have been studied (55). 

In addition to the fundamental property of particle si2e (and surface area), carbon black possesses a secondary characteristic of stmcture, best described as the tendency of individual particles to agglomerate or associate with one another. These two properties or characteristics of the carbon control the degree and nature of the reinforcing character of the black in mbber. The stmcture of the carbon black is deterrnined by dibutyl phthalate absorption and surface area is estimated by N2 absorption (Table 10). 

Disazo JMordant Dyes. Examples of disazo dyes are Diamond Alizarine Black SN [3258-74-0] (55) (Cl Mordant Black 25 Cl 21725) and a secondary disazo dye. Diamond Black F [8027-29-0] (56) (Cl Mordant Black 5 Cl 26695). 

If the bounding surface is gray rather than black, multiplication of Eq. (5-154) by surface emissivity 1 allows properly for reduction of the primary beams, gas-to-surface or surface-to-gas, but secondary reflections are ignored. The correction then lies between 1 and 1, and for most industrially important surfaces with 1 > 0.8 a value of (1 -t- 1)/ 2 is adequate. Rigorous allowance for this and other factors is presented later, e.g., Eq. (5-163). 

S 111 fi 1 r-reco ve ry p lants Carbon-black plants (furnace process) Primary lead smelters Fuel-conversion plants Sintering plants Secondary metal-production plants Chemical-process plants ... 

Fig. 3.9. Video images, ion-induced secondary of a defect in car paint white signal corresponds electron images, and mass-resolved ion images to high intensities, black to low intensities [3.19].

Secondary detonating explosive substance or black powder or article containing a secondary detonating explosive substance, in each case without means of initiation and without a propelling charge, or article containing a primary explosive substance and containing two or more independent safety features D... 

Resultant analysis, this procedure, developed by James Black and colleagues (Br. J. Pharmacol. 84,561-571, 1985), allows measurement of the receptor affinity of a competitive antagonist, which has secondary properties that obscure the receptor antagonism see Chapter 6.6 for further discussion. 

For a monograph, see Reutov, O.A. Beletskaya, I.P. Kurts, A.L. Ambident Anions Plenum NY, 1983. For a review, see Black, T.H. Org. Prep. Proced. Int., 1989, 21, 179. Both cyanates and isocyanates have been isolated in treatment of secondary alkyl iodides with NCO Holm, A. Wentrup, C. Acta Chem. Scand., 1966, 20, 2123. 

A reaction that involves dehydrogenation to an imine, which then reacts further is the reaction of primary or secondary amines with palladium black. The imine initially formed by the dehydrogenation reacts with another molecule of the same or a different amine to give an aminal, which loses NH3 or RNH2 to give a secondary or tertiary amine. An example is the reaction between V-methylbenzylamine and... 

Aliphatic primary and secondary amines primarily react with the diazonium compound fast black salt K to yield colored triazene derivatives [1] according to the following scheme ... 

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