Enrique S. Quintana

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Micronuclei in peripheral blood lymphocytes from British Columbia seasonal farmworkers and controls were evaluated using the cytokinesis-block technique. The farmworkers harvested berry crops and were likely occupationally exposed to pesticides. Subjects were 39 female subjects of South Asian descent; 18 farmworkers employed during 1993 and 21 age-matched(More)
PURPOSE To compare the efficacy and safety of intravenously administered granisetron with those of chlorpromazine plus dexamethosone in the prevention of ifosmamide-induced emesis in children with malignant disease. PATIENTS AND METHODS Eighty-eight children, aged 2 to 17 years, were scheduled for ifosfamide therapy (> or = 3 gm/m2) for 2 or 3 consecutive(More)
The effect of various doses (75-300 mg/kg b.w.) of carboplatin on the induction of micronuclei in Ehrlich ascites tumor (EAT) cells was studied. Carboplatin treatment resulted in a dose-dependent increase in the frequency of micronucleated EAT cells. Carboplatin treatment also decreased the mitotic index. The dose-effect curves were linear-quadratic for all(More)
Through continuous cardiac output monitoring, we investigated the temporal relationship between hemodynamic changes and plasma cytokines in a cancer patient who developed collateral sepsis to immunotherapy. A 52-year-old male with metastatic renal cell carcinoma received interleukin-2 (IL-2) infusion completing 72 h of administration. The patient developed(More)
The main objective of this study was to evaluate the response rate to i fosfamide + vincristine + dact inomycin OVA) in children with rhabdomyosa rcoma (RMS) and other mal ignant mesenchymal tumous (MMT). The use of chemotherapy as a front-l ine t reatment modal i ty and the inclusion of all M M T in the same protocol were in keeping with the conclusions of(More)
We investigated the effect of 2 months of exposure to cold conditions (0-5 C) on capillarization and on fiber size, distribution and ultrastructure in the pectoralis muscle of nine pigeons (Columbia livia; mean body mass 700 31 g) and compared the results with measurements from four control birds (mean mass 715 42 g) kept at normal ambient temperature(More)
We present a new parallel matrix inversion algorithm and report its implementation on parallel computers with distributed memory. The algorithm features natural load balance, simple programming and easy performance optimization, while maintaining the same arithmetic cost and numerical properties of the conventional inversion algorithm. Our analysis and(More)
Wider coverage of observation missions will increase onboard power restrictions while, at the same time, pose higher demands from the perspective of processing time, thus asking for the exploration of novel high-performance and low-power processing architectures. In this paper, we analyze the acceleration of spectral unmixing, a key technique to process(More)
In this paper, we present an algorithm for computing the characteristic polynomial of the pencil (A ? sE). It is shown that after a preliminary reduction of the matrices A and E to, respectively, an upper Hessenberg and an upper triangular matrix, the problem of computing the characteristic polynomial is transformed to the solution of certain triangular(More)
This observation reports the case of a soft tissue tumor occurring in a 11 years-old boy. On standard histologic staining, this tumor corresponded to an undifferentiated sarcoma of high grade of malignancy. Immuno-histochemical features (laminin, vimentin, UEA I and Factor VIII R-ag) and ultrastructural analysis (presence of Weibel-Palade bodies) led us to(More)
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