Subject yellow’ form

Fe(C8H8N)4(NCS)218 was for many years believed to exist in two geometrically isomeric forms—a yellow form (a) and a violet form (j8)—and the composition and structure of the violet form have long been a subject of controversy.21-24 The yellow form has finally been identified as the trans octahedral compound, whereas the violet form is merely the yellow form con-... 

Qualitative detection of excess protein in urine is largely based on use of dipstick tests. The reactive portion of the stick is coated with a buffered indicator that develops color in the presence of protein. A typical example is Albustix (Bayer Corporation, Diagnostics Division, Tarrytown, NY), in which bromphenoi blue, buffered to pH 3 with citrate, is present mostly in the protonated, yellow form. When protein is added, the affinity of the anionic form of the indicator dye for protein causes a shift of the equilibrium between anionic and protonated forms of the indicator toward formation of the blue anionic species. The intensity of the shade of blue produced is then proportional to the concentration of protein in the specimen. Combur 8 strips (Roche Diagnostics, Inc., Indianapolis, IN) are said to be less subject to drug interferences. Their detection hmit is 7mg/dL. 

Step 8 Preparation of (2.3-isopropyiidenedioxy)-propyi anthraniiate-80 g oi (2,3-Isopropyl-idenedioxy)-propyl o-nitrobenzoate, obtained as described in Step A, were subjected to hydrogenation for a period of one hour in 800 cc of absolute alcohol in the presence of 2 g of palladized carbon black as catalyst. The reaction mixture was filtered and the filtrate was evaporated under vacuum to obtain 70.5 g (being a yield of 98.5%) of (2,3-isopropylidenedl-oxy)-propyl anthranilate in the form of a yellow oil which distilled at 159°C to 160°C under 0.5 mm of pressure. 

Dezincification is readily apparent, since the yellow colour of the brass is replaced by the characteristic red of copper, which may take the form of small plugs or of layers that in some cases can extend over the whole of the surface (Fig. 1.60). In plug-type dezincification a mechanically weak, porous residue of copper is produced, which may remain in situ or become removed by the pressure of water, leading to a perforation. In the layer type the transformation of the alloy into a mechanically weak layer of copper results in loss of strength, and failure may occur by splitting when the metal is subjected to water pressure or to external stress. 

It is obvious that the objection on the part of congress [to admitting Asians to citizenship] is not due to color, as color, but only to color as an evidence of a type of civilization which it characterizes. The yellow or brown racial color is the hallmark of Oriental despotisms. .. It was deemed that the subjects of these despotisms, with their fixed and ingrained pride in the type of their civilization. . . were not fitted and suited to make for the success of a republican form of Government. Hence they were denied citizenship. 

Besides the four elements, the Great Work was divided into four stages and each was characterized by a color black, white, yellow, and red. The Great Work consisted of separation of the Primary Material into separate masculine and feminine parts that were joined in what was called the lesser conjunction. This substance was subjected to various chemical operations until the substance was killed and left to rot in a process called putrefaction. Next the substance was separated again, bathed and purified, and then recombined in the greater conjunction. This process brought the substance back to life in a spiritual form. Because of the Great Work, the substance... 

The ferric iron is then changed to ferrous iron and with the oxidized manganese forms a purple color. This is characteristic of bottles which have been subjected to the sun s rays for a period of time. The manganese is added initially to the glass as a decolorizer to offset the yellow color of the iron. (7 )... 

Only activated aryl halides (e.g. 2,4-dinitrochlorobenzene and picryl chloride) react with pyridine, and the facility of these reactions is subject to much the same steric and electronic controls as alkylation. Picryl chloride forms characteristic yellow TV-picryl derivatives with pyridines. These have been used to help separate, purify and characterize particular liquid pyridines. Pyridine also undergoes quaternization with diphenyliodonium fluoroborate (equation 19). Treatment of pyridine 1-oxides with arenediazonium salts yields aryloxy quaternary salts (equation 20). 

---