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We describe 20 patients with a chronic polymorphic eruption; they shared clinical, histopathological, and therapeutic features of both dermatitis herpetiformis and bullous pemphigoid (BP). In 14 of these 20 cases, direct ...
Spermatophagy in the stallion epididymis: A scanning and transmission electron microscopy study
The occurrence of phagocytosis of spermatozoa in the epididymis is a controversial issue in male reproductive biology. In this paper we documented, by scanning and electron microscopy, the presence of spermatophages in the ...
Masculinidades juveniles en sectores empobrecidos: ni muy cerca, ni muy lejos: entre lo tradicional y lo alternativo
(Universidad de Chile, 1999-09)
Hydroxamic acid content of perennial triticeae
Ninety-four accessions of perennial Triticeae were examined for content of the hydroxamic acids DIBOA and DIMBOA. Levels of DIBOA (up to 44 mmolkg-1 fr. wt) were higher than those of DIMBOA (up to 4.5 mmol kg-1 fr.wt). The ...
Study of metallocene supported on porous and nonporous silica for the polymerization of ethylene
Porous and nonporous silicas are good supports for the synthesis of coordinative heterogeneous catalysts for ethylene polymerization. The catalytic activity of nonporous Aerosil depends critically on the percentage of ...
Gravimetric determination of nickel as the ternary Nickel - pyridine - picrate complex
A study of ternary complex formation between nickel, pyridine and picrate ion has been made. The metal - pyridine complex reacts with picrate to give an insoluble, stable, green precipitate. Conditions of formation, ...
Ion pathways in transverse tubules. Quantification of receptors in membranes isolated from frog and rabbit skeletal muscle
The presence of four cation pathways in membrane vesicles isolated from transverse tubules of frog and rabbit skeletal muscle was studied by measuring binding of specific blockers. Transverse tubules purified from frog ...
N-acylation of lactams derived from natural 2-benzoxazolinones and 1,4-benzoxazin-3-ones
(Sociedad Chilena de Quimica, 1999)
The N-acylation reaction of a series of lactams of biological interest, derived from 2-benzoxazolinones and 1,4-benzoxazin-3-one, with acetic anhydride has been studied. The reaction yields show the same tendency as that ...