ABSTRACT
Proposed are simple and available techniques that can be used for rapid and reliable environmental control specifically of natural water by means of instrumental and visual tests in outdoor conditions. Developed are the chemical colorimetric modes for fast detection of socially dangerous trace impurities in water such as Co(II), Pd(II), and Rh(III) as well as NO2 (-)-ions and Fe(III) serving as model impurities. Application of portable digital devices and scanner allows estimating the color coordinates and increasing the accuracy and sensitivity of the tests. The combination of complex formation with preconcentration of colored complexes replaces the sensitive but time-consuming and capricious kinetic method that is usually used for this purpose at the more convenient and reliable colorimetric method. As the test tools, the following ones are worked out: polyurethane foam tablets with sorbed colored complexes, the two-layer paper sandwich packaged in slide adapter and saturated by reagents, and polyethylene terephthalate blister with dried reagents. Fast analysis of polyurethane foam tablets is realized using a pocket digital RGB-colorimeter or portable photometer. Express analysis of two-layer paper sandwich or polyethylene terephthalate blister is realized by visual and instrumental tests. The metrological characteristics of the developed visual and instrumental express analysis techniques are estimated.
ABSTRACT
By means of silver nitrate impregnation and luminescent method adrenergic nervous plexuses in spinal cord of 7 people, 6 dogs, 4 cows and 7 rabbits was studied. 17 serial slices of human and rabbit embryos were also examined. Numerous branching and brightly luminescent adrenergic nerve endings were discovered in composition of nervous plexus of spinal cord subpial layer in man and in animals. They should be thought of as sympathetic endings exerting adaptational and trophic influence on adjacent structures and partly penetrating substantia alba of the spinal cord. These observations broaden the existing conceptions on receptory and effectory neuronal processes on the spinal cord surface.
