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Luis Velasco

Publications and source records attributed to Luis Velasco.

2 recordsLinked to original sources
PubMed2003

Mass spectrometric studies of cyclopentanol derivatives in the reductive coupling of alpha,beta-unsaturated ketones assisted by samarium diiodide.

The mass spectrometric fragmentations of a series of cyclopentanol derivatives in positive fast-atom bombardment (FAB(+)) mode were investigated. The corresponding pathways proposed were confirmed by MS/MS data obtained using linked scans at constant B/E, high-resolution accurate mass data, and comparisons with corresponding information for a specifically deuterated molecule.

Cyclopentanes↗
PubMedDate not supplied

[ULCERATIVE COLITIS: A 52 YEARS RETROSPECTIVE STUDY]

We present a retrospective study on 74 patients with inespecific chronic ulcerative colitis according to diagnostic criteria. The higher incidence was present in patients between 30 and 40 years old. The most frequent symptom was diarrhea (95%), abdominal pain (79%), rectal bleeding (87%), rectal tenesmus (50%), weight loss (36%), and fever (18%). In relation to the degree of severity, we found that 33,7% suffered mild symptoms, 46,6% had moderate symptoms, while 17,7% suffered severe symptoms. The endoscopic findings were: 93,2% friability, 90,5% hyperemia, and 84,4% granulatio. Mortality was of 6,7%. We concluded that this disease is rare in Peru. The related mortailty is low, symptoms are mostly moderate, and no association with cancer of colon was evidenced.

Journal Article↗