Sorptive properties of polycaproamide fibres containing antistats

Conclusions Modification of polycaproamide fibres with ethoxylated amines increases free volume and the combinatorial entropy of the polymer.The indicated changes in fibre structure cause an increase in their hygroscopicity.Bulgaria. Translated from Khimicheskie Volokna, No. 4, pp. 55–56, July–August, 1984.     

Identification of 130 kDa cell surface LDL-binding protein from smooth muscle cells as a partially processed T-cadherin precursor

Atypical cell surface lipoprotein-binding proteins of 105 kDa and 130 kDa are present in membranes of vascular smooth muscle cells. We recently identified the 105 kDa protein from human aortic media as T-cadherin, an unusual glycosylphosphatidylinositol (GPI)-anchored member of the cadherin family of cell adhesion proteins. The goal of the present study was to determine the identity of 130 kDa lipoprotein-binding protein of smooth muscle cells. We applied different approaches that included protein sequencing of purified protein from human aortic media, the use of human T-cadherin peptide-specific antisera, and enzymatic treatment of cultured cells with trypsin and GPI-specific phospholipase C. Our results indicate that the 130 kDa protein is a partially processed form of T-cadherin which is attached to the membrane surface of smooth muscle cells via a GPI anchor and contains uncleaved N-terminal propeptide sequence. Our data disclose that, in contrast to classical cadherins, T-cadherin is expressed on the cell surface in both its precursor (130 kDa) and mature (105 kDa) forms.     

Melting of magnesia refractory materials in an OKB-955N ore melting furnace

Conclusions The experinece in service of the IKB-955N furnace at Magnesite Plant in melting of different magnesia materials was summarized. The influence of a number of factors, including magnesium oxide content in the charge, on the indices of the melting process, was established.The optimum diameter of decomposition of the electrodes, diameter of reaction zone, and specific surface power in the molten material were determined for the different materials.On the basis of approximation equations of the experimental data a method of approximate evaluation of the basic production parameters of the melting process was proposed.Means of increasing the productivity of ore melting furnaces by selection of the optimum diameter of decomposition of the electrodes, adjustment of the automatic system, reduction of melting time, and increasing the average input power were shown.Translated from Ogneupory, No. 1, pp. 34–38, January, 1990.     

Laser evaluation of permittivity of conducting films

It is shown that a laser can be used for determining the permittivity of conducting films in the optical frequency range.