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A liberal, one of the pillars of capitalism in the Russian Empire, financial angel of the Moscow Art Theater, and friend of Maxim Gorky — this was Savva Timofeevich Morozov on the eve of the Revolution of 1905. Regrettably, the literature contains no rounded characterization of him. Morozov's participation in the social and political activities of the liberal bourgeoisie has been examined in a number of writings by V. Ia. Laverychev. (1) Morozov left a significant trail in other people's memoirs. Gorky wrote a sketch devoted to him, in 1922. (2) He also referred to Morozov in his literary portraits of L. B. Krasin (3) and the merchant N. A. Bugrov. (4) Morozov also served as a prototype for many of Gorky's literary characters ("the patron of the revolution," Liutov, in The Life of Klim Samgin [Zhizn' Klima Samgina], the Artamonovs, Egor Bulychov). (5) The writer S. T. Grigor'ev expressed the desire that Gorky write a book about this uncommon individual. (6)

High differential pressure drop is frequently required in the process line of electric power plants. However, cavitation produced by a high pressure drop could damage the pipe and pump blades. In these experiments, the effects of cavitation and plate thickness for small-bore diameter (d) to pipe diameter (D) ratio (β= d/D) orifice plates were evaluated in a 100 mm diameter test section of a water flow calibration facility. Three size orifice meters were tested with β= 0.10, 0.15, and 0.33 and no bevel on the throat. The cavitation number at inception was measured to be 1.0 to 1.2 for all experiments. Although cavitation occurred in all experiments, the discharge coefficient was affected by cavitation only for the smallest bore (β= 0.10) and thickest plate tested, 7.0 mm or t/d = 0.70 where t is the plate thickness. Thickness seemed to influence the discharge coefficient only for the β= 0.10 plate. But the trends in the results for thickness were not conclusive and could be attributed to edge sharpness.

Hydrodynamic comparison of two polymer valves with two mechanical valves is presented. The valves were perfused in a steady flow system, and comparisons between the valves were made on the transvalvular pressure distribution and drop, opening area, and leakage volume. Particular emphasis was placed on a slit-type bileaflet polymer valve which was newly designed and fabricated in our research group. The results showed that the functional characteristics of a slit-type bileaflet polymer valve compared favorably with that of mechanical valves. This valve may be a viable and inexpensive alternative, especially for short-term use in TAH or VAD systems.

2-Halomethylidene-1,4-selen (tellur) azino [2, 3-g, h] carbazoles are prepared by the seleno (telluro) halogenation of N-propargylcarbazole under heterogeneous reaction conditions.

Dehalogenation products were obtained under conditions for the two-phase selenohalogenation of N,N-diallylarylsulfamides in addition to the major products, 1,1-dihalo-2,6-dihalomethyl-4-arylsulfonylperhydro-1,4-selenazines. Phenylselenium trihalides form derivatives of perhydro-1,4-azaselenonium halides. Tellurohalogenation gives analogous results but tetrabromotellurium partially forms intermolecular complexes.

The bisallylsulfonamides (I) react with the selenium(tellurium)tetrahalides (II) to give the 1,1‐dihaloperhydroselen(tellur)azines (III) which lose halogen upon heating, producing the perhydroselen(tellur)azines (IV).

Reaction of N‐propargylcarbazole (I) with the selenium(tellurium) tetrahalides (II) gives the ring system (III) mentioned in the title.