Stereo-apparatuses

The polysulfones are used for manufacturing of printed-circuit substrates, moving parts of relays, coils, clamps, switches, pipes socles, potentiometers details, bodies of tools, alkaline storage and solar batteries, cable and capacitor insulation, sets of television and stereo-apparatuses, radomes. The details under bonnet, the head lights mirrors, the flasks of hydraulic lifting mechanisms of cars are produced from polysulfones. 

So, heu of "ctemtcai iwccnn (STM and related apparatus) we daim to e(fea particular stereo-chcrncal syntheses by using specially shaped zeolites. But it is stated that these specially shaped zeoliics arc < synthesized—without chemical tweezers". How The answer is not as difficult as it may seem. 

Unfortunately, the working distance for commercial stereo microscopes is rather short, and the microscope also does not accommodate readily the usual large glove box with a vertical or slightly inclined window. A single-chamber evacu-able dry box is available commercially which would appear to be satisfactory for crystal mounting and other operations in which the apparatus is not large.2... 

D Systems Inc., Valencia, CA, u.S.A. Stereo lithography Apparatus (SLA) Photopolymer system point-by-point irradiation with a HeCd resp. an argon ion laser... 

Ashton FT, Somlyo AV, Somlyo AP (1975) The contractile apparatus ofvascular smooth muscle intermediate high volt e stereo electron microscopy. J Mol Biol 98 17-29 Babij P (1993) Tissue-specific and developmentally regulated alternative splicing of a visceral isoform of smooth muscle myosin heavy chain. Nucleic Adds Res 21 1467-1471... 

Hydroxyvaleric amide is completely hydrolysed only if it is boiled down to dryness with dilute hydrochloric acid, or heated in a reflux apparatus for hour in a current of air. Stereo-chemical influences are effective in... 

Acetate pyrolysis is normally carried out using a flow apparatus at temperatures in die region of 3(X)-600 °C. The syn elimination mechanism (equation 48) was established by pyrolysis of the stereospecifi-cally deuterium-labeled acetates (116) and (117), which gave labeled and unlabeled products as shown in equations (49) and (50). 1,2-Disubstituted acyclic alkenes are normally obtained with the ( )-stereo-chemistry, as for the other eliminations discussed in this chapter. However, the regioselectivity of acetate pyrolysis can be rather modest. This is because the regioselectivity is affected by several factors, in particular the stability of the product alkene and the number of available 3-hydrogens. If these two factors oppose each other only low regioselectivity is observed, e.g. a 50 50 mixture of alkenes (119) and (120) was obtained from the pyrolysis of acetate (118 equation 51). 

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