Primary cardiac atrial sarcomas. Report of two histologically different cases and review of the literature.

Primary cardiac sarcomas are extremely uncommon. We report two patients with primary cardiac atrial sarcomas: a case report of a 34-year old woman with intimal sarcoma of the left atrium and a case report of a 30-year old man with synovial sarcoma of the right atrium. Clinicopathological and differential diagnosis with a discussion regarding the role of molecular studies is presented.

Microstructure and mechanical properties of Nb15Al10Ti alloy produced by mechanical alloying and high temperature processing.

In this work, an Nb15Al10Ti alloy produced by mechanical alloying was investigated. The milling of elemental powders of Nb, Al as well as TiAl intermetallic phase resulted in the formation of homogenous niobium solid solution, Nb(ss), and refinement of powder particles. Powder after milling was consolidated by conventional hot pressing at 1300 degrees C under pressure of 25 MPa as well as by hot isostatic pressing at 1200 degrees C under pressure of 1 GPa.

Scanning and transmission electron microscopy microstructure characterization of mechanically alloyed Nb-Ti-Al alloys.

Results are presented of an investigation of the microstructure development during mechanical alloying and following consolidation of an Nb15Ti15Al alloy. The alloy was synthesized from elemental as well as pre-alloyed powders. The microstructure of this material was examined by transmission electron microscopy, scanning electron microscopy and X-ray diffraction.

[Determination of the concentration of chorionic gonadotropin (HCG) and its free subunits in placental tissue during various periods of normal pregnancy].

The aim of this study was to estimate HCG and its free subunits (alpha and beta) content in placental tissue and to determine the characteristic pattern of their ratio changes in the course of normal pregnancy. For this we used 47 samples of placental extracts. The tissue was extracted and gel filtrated on a calibrated Sephadex-G-100 column.

[Role of detection of alphafoetoprotein in serum of pregnant women with risk of abortion (author's transl)].

Alpha, foetoprotein (AFP) was radio-immunologically determined in the serum of 109 pregnant women with imminent abortion and of 220 clinically intact women who were between the sixth and 22nd weeks of pregnancy. -- AFP values were found to be normal, within limits between 0.5 m and 2.