The weakly electric fish from the main channel of the Amazon river, Sternarchogiton nattereri, offers a striking case of morphological variation. Females and most males are toothless, or present only few minute teeth on the mandible, whereas some males exhibit exaggerated, spike-like teeth that project externally from the snout and chin. Androgens are known to influence the expression of sexual...

Toothed whales (Cetacea, odontoceti) use biosonar to navigate their environment and to find and catch prey. All studied toothed whale species have evolved highly directional, high-amplitude ultrasonic clicks suited for long-range echolocation of prey in open water. Little is known about the biosonar signals of toothed whale species inhabiting freshwater habitats such as endangered river dolphin...

Flux switching motor is a type of electric machine that locates both flux source and armature windings on the stator leaving its rotor a simple piece of iron. This machine was developed by combining the toothed stator structure of induction machine and the toothed rotor structure of switched reluctance machine together. Furthermore, it has three types of flux sources which include permanent mag...

REFERENCES Denning, J. (1996) Male urinary incontinence. In: Norton, C. (ed) Nursing for Continence. Beaconsfield, Bucks: Beaconsfield Publishers. Dorey, G. (2000) Male patients with lower tract symptoms 2: Treatment. British Journal of Nursing; 9: 9, 553–557. Feneley, R.C.L. (1986) Normal micturition and its control. In: Mandelstam, D. (ed) Incontinence and its Management. London: Croom Helm. ...

layed until January, 1928. These clinics are controlled by the State Board of Education and are under the direct supervision of its Division of Special Education and Standards and in cooperation with the local school superintendents or state supervising agents. In January, 1928, eight clinics were opened, one in each of the following places: Danbury, Hartford, Meriden, New Britain,* New Haven, ...

Plagioscion squamosissimus (Heckel 1840), a fish endemic to the Amazon Basin and commonly known as the “silver croaker”, plays an important role in the ecology and economy of Pará State, Brazil. Knowledge of host-parasite relationships is important to understanding the role of parasites in the control of natural host populations. This work describes histopathological aspects caused by several c...

This study documents changes in contamination over time at seasonal, interannual, and decadal time scales for sport fish collected in San Francisco Bay. Samples from seven fish species were prepared according to common consumption practices (muscle fillets either with or without skin) and analyzed for trace metals (mercury and selenium) and trace organochlorine contaminants (PCBs, DDTs, chlorda...

Recent field surveys performed in the newly-discovered Taurida Cave (Crimea, Russia, Late Villafranchian, 1.8–1.5 Ma) enabled us to unearth dentognathic remains of dirk-toothed cat Megantereon. Here we describe detail recovered further comparing it anatomically and biometrically with coeval Eurasian African sites. The analysis suggests inclusion hypodigm Villafranchain European species Meganter...