Horseradish peroxidase injections into dorsomedial and dorsolateral regions of the goldfish ( Carassius auratus ) telencephalon demonstrate, by retrograde cell labeling, that teleost receives a pattern projections from thalamus remarkably similar to those land vertebrates. The evidence provides support for homology between region corpus striatum vertebrates two dorsal medial pallium

In order to determine unambiguously the bearing of a sound source, fish must be able resolve acoustic pressure and components displacement vector from signals detected by otolithic organs. A new hypothesis for processing acoustical information bony is presented. It demonstrated that much required do this may implicit in structure ear its associated neural innervation. Possible algorithms are presented central nervous system might use further process derived localize source discriminate...

A molecular-level understanding of the loss CURVY1 (CVY1) gene expression (which encodes a member receptor-like protein kinase family) was investigated to gain insights into mechanisms controlling cell morphogenesis and development in Arabidopsis thaliana.Using reverse genetic biology approaches, we demonstrate that CVY1 is new DISTORTED with similar phenotypic characterization previously characterized ARP2/3 distorted mutants. Compared wild type, cvy1 mutant displayed strong trichome...

Abstract The ultrastructure of sensory hair cells in the utricle cichlid fish, Astronotus ocellatus , oscar, was studied by transmission electron microscopy serial ultrathin sections from different regions epithelium. Two distinctly types cell were found, one located striolar region epithelium and other extrastriolar region. Striolar have a well‐defined perinuclear cisterna just below nucleus, large mitochondria, Synapuc bodies.of are small clusters, while those relatively individually...

Sensory hair cells from the striolar region (striolar cells) of utricle and lagena ear a teleost fish Astronotus ocellatus (Cuvier) are sensitive to gentamicin sulphate, an ototoxic drug. In contrast, sensory outside (extra-striolar not gentamicin. These data, combined with results studies showing different ultrastructural features immunoreactivity calcium binding protein, S-100, lead suggestion that there distinguishable types in these endorgans. add increasing evidence classifying ears...

We study composites of mainly room temperature nematic cyanobiphenyl liquid crystals (nCB with n = 5, 6, 7, and 8) gold nanoparticles (GNP). report that doped GNP dramatically affects the material and, consequently, display parameters mesophase stability 5CB, 6CB, 7CB homologues, while no homogeneous dispersion occurs in 8CB homologue. several values switching voltages times a few lower than those for pure nematics, broader operational thermal range, which makes them good candidates...

The glossiphoniid freshwater leech, Helobdella stagnalis, was described by Linnaeus 1758 based on common European specimens. presence of a brown, chitinous scute the dorsal-anterior surface, as observed leeches elsewhere in world, has generally led to classification all scute-bearing members genus H. stagnalis. Here we describe morphology and behavior type species from Europe, analyze stagnalis-like specimens collected worldwide. We present evidence for at least four distinct that can be...

The freshwater butterfly fish, Pantodon buchholzi, is a member of the most primitive radiation teleosts. retinofugal projections were studied in this fish with autoradiographic and horseradish peroxidase (HRP) methods, cytoarchitecture retinorecipient regions diencephalon pretectum was analyzed Bodian-, cresylecht-violet- acetylcholinesterase-reacted sections. rostral contains large nucleus, not previously identified any other i.e. nucleus rostrolateralis. Other nuclei that are described...

We studied the dispersion of up to 20 wt% gold nanoparticles (GNP) in a room temperature nematic: cyanobiphenyl homologue 4′-pentyl-4-biphenylcarbonitrile (PBPCN or 5CB). At 15% GNP, threshold voltage decreases 1.2 times its value for pure nematic and switching-off time by factor three. show that this decrease display parameters is caused 1.8 dielectric anisotropy, 1.3 change average elastic parameter, about 4.6 rotational viscosity. The doped GNP did not affect thermal stability material's...

The dorsal (P2) and lateral (P3) pallial zones of bichirs receive a substantial projection from nucleus medianus the posterior tuberculum. Although does not direct retinal input, its close proximity to ascending tectal efferents suggests that it might input form segment retinotectal-tubercular pathway pallium. In order test this possibility, evoked responses light flashes were electrophysiologically recorded experimentally determined in bichirs. These experiments suggest single visual field...

1. Pure tone displacement sensitivity and bandwidth were measured from the saccule of ear in two anabantid species (Trichogaster trichopterus Helostoma temincki) using microphonic potentials with a 1 μV RMS threshold for second harmonic stimulus frequency. 2. Saccular microphonics recorded both 80 to 1600 Hz, lowest thresholds between 100 200 Hz. The overall response curves (sensitivity bandwidth) statistically similar one another an analysis variance, although there different at 800 3. hair...

Abstract The major visual centers of the octopus central nervous system are paired optic lobes. Bidirectional transport horseradish peroxidase (HRP) was used to determine connections lobe. Cells afferent lobe were identified by retrograde HRP in following lobes ganglia: anterior basal, median dorsal interbasal, subvertical, precommissural, brachial, and magnocellular. Labeled cells also observed within contralateral lobe, various tract bilaterally, photoreceptors ipsilateral retina....

The following paper reviews our study of the dispersion gold nanoparticles (GNPs) in different homologues cyanobiphenyl (CB) liquid crystals (nCB with n = 5, 6, 7). We show that doped GNPs dramatically affect material, and consequently display parameters mesophase stability these mainly room temperature nematics. report several at certain GNP percentages their values a few times lower than for pure nematics, switching voltages times, broader operational thermal range. These materials are...

Ice worms occupy a unique position in metazoan phylogeny that they are the only known annelid completes its life cycle ice. The mechanism(s) associated with this adaptation likely to occur at different levels, ranging from modification of their metabolism changes morphology. In study, we examined specimens Mesenchytraeus solifugus by scanning electron microscopy (SEM) and transmission (TEM) an effort identify morphologic structures may aid glacial habitation. We report M. contains elongated...

Pantodon buchholzi, the freshwater butterfly fish, is a member of Osteoglossomorpha, most primitive four major teleost radiations. The projections fibers originating in dorsal and ventral hemiretinas Pantodon, as determined with autoradiography, are reported here. Fibers hemiretina reach their targets through axial, medial optic tracts. that originate points termination by way Projections various tracts to preoptic, thalamic, tubercular, pretectal tectal regions, described previous study...

Abstract The relationship between the hair cell orientation pattern and innervation in saccule lagena of teleost Helostoma temmincki (the kissing gourami) was investigated with scanning electron microscopy Winkelmann‐Schmitt silver impregnation technique. consists four orthogonally oriented groups. anterior two groups are along animal's rostrocaudal axis, posterior its dorsoventral axis. orientations is a typical bidirectional one. Two divisions eighth nerve innervate saccule. division...