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As minas do Campo Branco, Castro Verde

Brochura técnica do Projecto Atlanterra - Interreg Espaço Atlântico

Roman slag distribution in the Portuguese sector of the Iberian Pyrite Belt [Ab...

Ethnicity and glutathione S-transferase (GSTM1/GSTT1) polymorphisms in a Brazil...

The distribution of polymorphisms related to glutathione S-transferases (GST) has been described in different populations, mainly for white individuals. We evaluated the distribution of GST mu (GSTM1) and theta (GSTT1) genotypes in 594 individuals, by multiplex PCR-based methods, using amplification of the exon 7 of CYP1A1 gene as an internal control. In São Paulo, 233 whites, 87 mulattos, and 137 blacks, all h...

Acute leukemias in Piauí: comparison with features observed in other regions of...

Differences in age and sex distribution as well as FAB (French-American-British classification) types have been reported for acute leukemias in several countries. We studied the demographics and response to treatment of patients with acute myeloid leukemia (AML) and acute lymphoblastic leukemia (ALL) between 1989 and 2000 in Teresina, Piauí, and compared these results with reports from Brazil and other countrie...

Optical Filters for Fibre Lasers and Amplifiers

The writing of arc-induced long period fibre gratings to be used as optical filters in Er/Yb fibre lasers and for gain flattening in EDFA is discussed. A new approach is presented for the production of filters with complex profiles

Optical filters for fibre lasers and amplifiers

The writing of arc-induced long period fibre gratings to be used as optical filters in Er/Yb fibre lasers and for gain flattening in EDFA is discussed. A new approach is presented for the production of filters with complex profiles.

EDFA Gain Flattening Using Long-Period Fibre Gratings Based on the Electric Arc...

We have flattened the gain spectrum of a commercial Erbium-doped fibre amplifier, obtaining a curve with approximately 3 dB of ripple, from 1524 nm to 1551 nm, using long-period fibre gratings as equalising optical filters. The fabrication principle of the long-period fibre grating is based on the electric arc technique.

Decreased gastric emptying and gastrointestinal and intestinal transits of liqu...

We studied the effect of complete spinal cord transection (SCT) on gastric emptying (GE) and on gastrointestinal (GI) and intestinal transits of liquid in awake rats using the phenol red method. Male Wistar rats (N = 65) weighing 180-200 g were fasted for 24 h and complete SCT was performed between C7 and T1 vertebrae after a careful midline dorsal incision. GE and GI and intestinal transits were measured 15 mi...

Effect of pyloroplasty and fundectomy on the delay of gastric emptying and gast...

We evaluated the effects of fundectomy and pyloroplasty on the delay of gastric emptying (GE) and gastrointestinal (GI) transit of liquid due to blood volume (BV) expansion in awake rats. Male Wistar rats (N = 76, 180-250 g) were first submitted to fundectomy (N = 26), Heinecke-Mikulicz pyloroplasty (N = 25) or SHAM laparotomy (N = 25). After 6 days, the left external jugular vein was cannulated and the animals...

Gastroduodenal resistance and neural mechanisms involved in saline flow decreas...

We have previously demonstrated that blood volume (BV) expansion decreases saline flow through the gastroduodenal (GD) segment in anesthetized rats (Xavier-Neto J, dos Santos AA & Rola FH (1990) Gut, 31: 1006-1010). The present study attempts to identify the site(s) of resistance and neural mechanisms involved in this phenomenon. Male Wistar rats (N = 97, 200-300 g) were surgically manipulated to create fou...