Characteristics bluish

PhycocyaniN Any of the characteristic bluish-green pigments of the cells of the class Cyanophyceae, which are soluble in water, but not in alcohol or ether. 

Lesion color and examination lighting can play a crucial role in scleritis evaluation. For example, red-free light can be used to enhance blood vessels and may allow the clinician to observe areas of vascular closure (Figure 28-6) within a scleritis lesion. These areas represent vascular occlusion and destruction from progressive infiltrative inflammation. Except in scleromalacia perforans, anterior scleritis creates a characteristic bluish red or purplish (violaceous) color in contrast to the salmon red or bright red injection observed in episcleritis. This violaceous... 

The chemiluminescent properties of luminol have a number of practical applications. A forensic assay that is used to identify the presence of blood at crime scenes is one of these. Thus, when an alkaline solution of luminol and hydrogen peroxide is exposed to blood, the characteristic bluish-green light associated with the chemiluminescence of luminol is observed the iron catalyst required for the reaction is provided by the hemoglobin present in blood. 

Observable Characteristics - Physical State (as normally shipped) Solid Color Gray to bluish black Odor Garlic-like. 

Lead is a naturally occurring bluish-gray metal found in small amounts in the earth s crust. It has no characteristic taste or smell. Metallic lead does not dissolve in water and does not bum. Lead can combine with other chemicals to form what are usually known as lead compounds or lead salts. Some lead salts dissolve in water better than others. Some natural and manufactured substances contain lead but do not look like lead in its metallic form. Some of these substances can bum—for example, organic lead compounds in some gasolines. 

Bluish red reactive dyes are almost totally dominated by H acid as the indispensable coupling component. Various mono- or disulphonated anilines or naphthylamines are suitable diazo components, but the outstandingly important one is orthanilic acid (7.96). As with orange and scarlet dyes, haloheterocyclic (Z) reactive systems are linked via the imino group of the H acid residue but sulphatoethylsulphone substituents are found in the diazo component with N-acetyl H acid as the typical coupler. A characteristic problem associated with reactive dyes derived from H acid is their accelerated fading under the simultaneous influence of perspiration and light (section 3.3.4). 

Symptoms of the acute phase are acute respiratory distress, breathing difficulty, profuse sweating, turning bluish in color, high temperature, and increased pulse and respiratory rate with chest sounds. If an x-ray is performed, mediastinal widening (swelling of lymph nodes under the breastbone) is very characteristic. Shock and death usually follow within 24 to 36 hours after the onset of respiratory distress. The fatality rate from inhalation anthrax ranges from 65 to 90% even with antibiotic therapy.3... 

Two characteristics of the light from noctilucent clouds may be observed with no more than one s eyes and a polarizing filter its color and whether or not it is strongly polarized. This enabled Ludlum (1957) to estimate the size range of noctilucent cloud particles. Because of the observed strong polarization he set 0.16 jum as their upper size limit on the basis of the observed color—white, silvery, sometimes bluish, but not sufficiently so as to indicate very small particles—he set 0.008 jam as their lower size limit. From other than optical evidence he also concluded that the particles were not ice, but were more likely to be volcanic, meteoric, or interplanetary dust. 

Lie de vin oil (green cognac oil or wine lees oil) is obtained by steam distillation of the yeast and other sediments (lees) formed in wine. It is a green to bluish-green liquid with a characteristic cognac aroma. 

Pepper oil and pepper oleoresin are obtained from the black pepper Piper nigrum L. (Piperaceae). Pepper oil is produced by steam distillation of whole or crushed fruits. The oil is an almost colorless to bluish-green liquid with a characteristic odor, reminiscent of pepper, but without the pungency of the spice. 

The characteristic color of a wet fluorescein stain under ultraviolet light is a bright yellow. Care must be exercised not to confuse this stain with many oils which also appear yellow under ultraviolet light. Most metals have a bluish cast under ultraviolet light. Plastic materials under ultraviolet light vary in color but have little or no tendency to appear yellow. 

Acetic, CHg.COOH,—Colourless crystals M.P. 17° B.P. 119° characteristic odour vapour burns with bluish flame miscible in all proportions with water, alcohol and ether. 

External Characters.—The cheese is struck with the knuckle or with a small hammer on the rind to ascertain if it gives a clear, sharp sound (sound cheese) or if there is discontinuity (blisters, honey-combing, fissures). The interior is examined to ascertain if this is homogeneous, and in the case of a cheese with cavities, if these are uniform to determine if the odour is agreeable and piquant (sound cheese) or repulsive (altered), if the taste is that characteristic of the particular cheese and if the colour is uniform or if red, black or bluish spots are present. 

---