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Copyright of Spanish Journal of Rural Development is the property of Spanish Journal of Rural Development and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This article studies the mechanical behaviour of E-glass/epoxy composites fabricated with a vacuum infusion process. An experimental characterization of the in-plane lamina properties has been conducted based on the recommendations found on the literature and ASTM standards. The properties were determined by tensile, three rail shear and flexure tests. The main focus is the evaluation of these tests for mechanical material characterization. In the computation of the elastic modulus using the chord and secant method for longitudinal ( E1) and transverse ( E2) modulus a relative error of 5% and 6.5% is found respectively. In addition, comparing the ±45° tensile test and three rail shear test for in-plane shear characterization, a relative error of 2.5% for the elastic shear modulus ( G12) and 37% for the ultimate shear stress is found. Shear tests put on evidence the lack of linearity on the stress—strain relation. [ABSTRACT FROM AUTHOR]

Describes the isolation of human complementary DNA clones for both the subunits of the general transcription factor IIE (TFIIE). Molecular cloning; Properties of recombinant TFIIE; Transcription; Discussion.

A 23 year-old man developed thrombocytopenic purpura at the end of the second week of the clinical evolution of hepatitis A confirmed by viral markers. The bone marrow of this patient showed megakaryocytic hyperplasia. Circulating in his serum immune complexes were demonstrated by solid phase conglutinin enzymo-immunoassay. Platelet-reactive serum factors were also detected by an indirect immunofluorescence test using fresh donor platelets as targets. The evolution of both the hepatitis and the purpura were benign with no therapy other than bedrest. Platelet count normalized within five weeks of the onset of purpura, and IgM antibodies against hepatitis A virus as well as circulating immune complexes dropped to normal levels. It is postulated that the thrombocytopenia of this case was caused by nonspecific deposition of immune complexes at the platelet surface. [ABSTRACT FROM AUTHOR]

An abstract of the article "Risk of abnormal placentation with increasing number of Caesarean sections," by P. Morales and colleagues is presented.