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Formica dusmeti Emery, 1909, an Iberian endemic ant species: description of the male and distribution [Hymenoptera: Formicidae]

100%

Espadaler X., Gomez C.

Annales Zoologici

2000

tom 50

nr 1

The male of the iberian endemic ant Formica dusmeti Emery, 1909 is described. The shorter scape and hairless appendices differentiate those males from those of the closest species F. frontalis Santschi and F. truncorum Fabricius. The distribution of F. dusmeti is updated.

Molecular characterization of the cry gene profile of Bacillus thuringiensis isolated from a caribbean region of Colombia

61%

Fragoso P., Armijo A., Gomez D., Gomez C., Bugueno M., Sanchez G., Venegas J.

Polish Journal of Microbiology

2018

tom 67

nr 1

In order to characterize native strains of Bacillus thuringiensis of the Colombian Caribbean with toxic effect against insect vectors, 28 samples of bacteria identified as B. thuringiensis were isolated from different soils and muds around the city of Valledupar. Using a biological test, five isolates of B. thuringiensis showed toxic effect against larvae of Aedes aegypti. PCR methods were used to detect cry1, cry2, cry4B, cry10 and cyt1 genes. Cry1 and cry2 genes were detected in 35.7% and 32.1% of the 28 isolates analyzed, respectively. Surprisingly, reduced lengths of cry4B gene segments were detected in 28.6% of B. thuringiensis samples. The presence of cry10 or cyt1 was not detected in any of the 28 samples of B. thuringiensis, despite the high sensitivity of the assays used. The results show that B. thuringiensis samples from the Colombian Caribbean have atypical characteristics compared to those of Latin America and elsewhere in the world, which is consistent with the idea that the geographic origin of B. thuringiensis samples is associated with their biological and genetic characteristics.

Polyviewed expression of the altered contractility of the guinea-pig ileum after ischemia in situ and superfusion in vitro

61%

Santiago-Mejia J., Ventura-Martinez R., Gomez C., Parra-Gamez L., Gonzalez-Rios J., Rodriguez R.

Journal of Physiology and Pharmacology

2007

tom 58

nr 2

This study deals with the polyviewed expression of the altered contractility of the isolated ileum of the guinea-pig after ischemia/superfusion (I/S). Intestinal ischemia was produced by clamping the superior mesenteric artery for 40, 80 or 160 min. Ischemic and non-ischemic segments taken from the same guinea-pig were mounted for tension recording in organ baths and superfused (120 min) with an oxygenated Krebs-bicarbonate solution. Data were analyzed by means of the Polyview System software, which allows detecting simultaneously several events of one response. Histopathological changes in myenteric neurons were also examined. We found that ischemia in situ followed by superfusion in vitro (reoxygenation) severely reduces the spontaneous intestine contractile activity, and significantly decreases the maximal contractile response to ACh and to electrical field stimulation (EFS), the maximal rate of tension, and the sensitivity of the tissue to EFS. In addition, these ischemic intestines respond with a long-lasting contracture when electrical stimulation was started at supramaximal voltage. Functional alterations were time dependent. Neurons exhibited features of necrosis. These results provide clear evidence of detrimental effects of I/S on intestine contractile function. Digital analysis allows quantification of additional parameters important for evaluation of functional changes after I/S and of the degree of neuroprotection.

Ograniczanie wyników

1 Annales Zoologici

1 Journal of Physiology and Pharmacology

1 Polish Journal of Microbiology

3 Gomez C.

1 Armijo A.

1 Bugueno M.

1 Espadaler X.

1 Fragoso P.

1 Gomez D.

1 Gonzalez-Rios J.

1 Parra-Gamez L.

1 Rodriguez R.

1 Sanchez G.

1 Santiago-Mejia J.

1 Venegas J.

1 Ventura-Martinez R.

1 2018

1 2007

1 2000

Wyniki wyszukiwania

Formica dusmeti Emery, 1909, an Iberian endemic ant species: description of the male and distribution [Hymenoptera: Formicidae]

Molecular characterization of the cry gene profile of Bacillus thuringiensis isolated from a caribbean region of Colombia

Polyviewed expression of the altered contractility of the guinea-pig ileum after ischemia in situ and superfusion in vitro