Ramiro A. Ramirez

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The binding of vasoactive intestinal peptide (VIP) and the stimulation of adenylate cyclase were studied in mononuclear cells from human peripheral blood. The binding depended on time, temperature and pH, and was reversible, saturable and specific. Binding studies suggested the presence of 2 classes of binding site: a class with high affinity (Kd = 2.4 X(More)
Administration of pertussis toxin (60 micrograms/kg i.p.) to guinea-pigs blocked the ability of morphine, norepinephrine and clonidine to inhibit electrically stimulated contractions in the isolated ileum. The toxin reached its maximum effect 6 days after its administration. The effect of the toxin was reversible; a slow but full recovery of the response to(More)
We examined the local and systemic production of nitric oxide (NO) and the pattern of cytokine during the course of Leishmania mexicana infection in susceptible BALB/c and resistant C57BL/6 mice. NO derivatives were measured in serum, and the expression of inducible nitric oxide synthase (iNOS), interferon (IFN-gamma), interleukin (IL-4) and epidermal(More)
In this paper, the production of humic substances (HS) through the bacterial solubilization of low rank coal (LRC) was evaluated. The evaluation was carried out by 19 bacterial strains isolated in microenvironments with high contents of coal wastes. The biotransformed LRC and the HS produced were quantified in vitro in a liquid growth medium. The humic(More)
  • Mohamed Hamel, Garry Brennand, +40 authors Fernando Valera
  • 2007
The data, analysis and any other information ('Content') contained in this publication is for infor-mational purposes only and is not intended as a substitute for advice from your business, finance, investment consultant or other professional. Whilst reasonable efforts have been made to ensure the accuracy of the Content of this publication, the OPEC(More)
Endocan is a dermatan sulfate proteoglycan (DSPG) that has been observed in the cytoplasm of endothelial cells of small and large vessels in lung, kidney, liver, colon, ovary and brain tumors. This DSPG has been implicated in the regulation of cellular activities such as adhesion, migration, and proliferation. Given the important roles played by endocan(More)
  • Garry Brennand, Jan Ban, +16 authors Mahmud Sadeg
  • 2008
2 The data, analysis and any other information ('Content') contained in this publication is for infor-mational purposes only and is not intended as a substitute for advice from your business, finance, investment consultant or other professional. Whilst reasonable efforts have been made to ensure the accuracy of the Content of this publication, the OPEC(More)
This study assessed, under greenhouse conditions, the use of low-rank coal (LRC) generated in the “El Cerrejón” (La Guajira Colombia) mine as a source of humified organic matter, which is released by the activity of coal solubilizing bacteria (CSB), in order to improve the properties of edaphic materials (EM) used in post-mining land reclamation processes.(More)
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