Decapod crustaceans synthesize highly active proteolytic enzymes in the midgut gland and release at least a part of them into the stomach where they facilitate the first step in peptide hydrolysis. The most common proteinases in the gastric fluid characterized so far are serine proteinases, that is, trypsin and chymotrypsin. These enzymes show highest activities at neutral or slightly alkaline ...

Case presentation: A 12 years old Iranian girl, who lived in Brazil for 5 previously to the stroke and was bilingual (Persian Portuguese). On October 2016 girl suddenly presented seizures, hemiparesis aphasia. Tests immunological, infectious coagulation diseases were normal; echocardiogram showed a 39 × 17 mm tumor left atrial cavity, that surgically excised 20 days after. The patient came our ...

We carried out a definition of the species group to which Conus praecellens A. Adams 1854 belongs using a combination of comparative morphological data, molecular phylogeny based on standard genetic markers and toxinological markers. Prior to this work, Conus praecellens was generally postulated to belong to a clade of similarly high-spired, smaller Conusspecies such as Conus pagodus Kiener, 18...

Using species-level phylogenies, the speciation mode of Gyrodactylus species infecting a single host genus was evaluated. Eighteen Gyrodactylus species were collected from gobies of the genus Pomatoschistus and sympatric fish species across the distribution range of the hosts. The V4 region of the ssrRNA and the internal transcribed spacers encompassing the 5.8S rRNA gene were sequenced; by inc...

The combination of exceptionally high species diversity, high host specificity, and a complex reproduction system raises many questions about the underlying mechanisms triggering speciation in the flatworm genus Gyrodactylus. The coevolutionary history with their goby hosts was investigated using both topology- and distance-based approaches; phylogenies were constructed of the V4 region of the ...

Fetal monoaminergic tissue was examined for its capacity to reinnervate rat striatum and to study the function of the graft. When grafting human fetal mesencephalic tissue to dopamine depleted striatum, a reduction in apomorphine rotational behavior was well correlated with the time outgrowing fibers were detected with tyrosine hydroxylase (TH) immunohistochemistry. Cell migration from graft to...

The presence or absence of teeth on the vomer and palatoquadrate bones has a long history in fish systematics. Dentition of these bones is often consistent across families, and is often included in keys to families and family diagnoses. The angelfish family Pomacanthidae has been almost consistently diagnosed as lacking both vomerine and palatine teeth (e.g., Günther 1860; Day 1875; Jordan & Fo...