Poly(methyl methacrylate) and polystyrene functionalized by fullerene C
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tend to form micellar structures comprising a fullerene cluster as a core and a macromolecular shell. Films prepared from ...PMMA-C
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and PS-C
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micellar solutions are polymer matrices with fullerene-containing globular structures uniformly distributed in the polymer bulk.
Experience with central lymphodissection (CLD) was analyzed in 93 patients with primary thyroid cancer (pT1-4aN0-1a). Prophylactic central lymphodissection was fulfilled in 48 patients, therapeutic ...CLD in 45 patients. The size and spread of the primary thyroid tumor had no difference in both groups of patients. In patients of the 2nd group thyroidectomy was fulfilled more often (71.1%) than in the 1st group (58.3%).The frequency of postoperative transitory hypoparathyroidism after surgery on the thyroid gland and therapeutic CLD made up 13.3%. There were no recurrent metastases of cancer after CLD fulfilled during the last 3.5 years. All cancer metastases in the postoperative period were detected in lymph nodes of the neck (2-5 levels) and their prevalence was 8.9%.
Rotary compressors are widely used due to their reliability, ease in operation, relative simplicity in design and high efficiency.
In the present article a method has been proposed for the analysis ...of the rotors’ meshing conditions in the rotary machines without rotor timing gears, taking into account the actual profile clearances. Employment of the results obtained will help to analyze and improve the rotor profiles and further to optimize the algorithm of underrating thus improving the operational characteristics of the newly developed compressors.
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