Experimental Study of Batesian Mimicry in the Salamanders Plethodon jordani and Desmognathus ochrophaeus

1973 ◽  
Vol 90 (1) ◽  
pp. 38 ◽  
Author(s):  
Edmund D. Brodie ◽  
Ronnie R. Howard
Keyword(s):  
Experimental Study ◽  
Batesian Mimicry ◽  
Plethodon Jordani ◽  
Desmognathus Ochrophaeus

An Experimental Study of Batesian Mimicry between the Salamanders Plethodon jordani and Desmognathus ochrophaeus

1981 ◽  
Vol 15 (3) ◽  
pp. 275 ◽  
Author(s):  
George M. Labanick ◽  
Ronald A. Brandon
Keyword(s):  
Experimental Study ◽  
Batesian Mimicry ◽  
Plethodon Jordani ◽  
Desmognathus Ochrophaeus

An Experimental Study of Aposematic Coloration in the Salamander Plethodon jordani

Copeia ◽  
1976 ◽  
Vol 1976 (1) ◽  
pp. 59 ◽  
Author(s):  
John Leroy Hensel ◽  
Edmund D. Brodie
Keyword(s):  
Experimental Study ◽  
Aposematic Coloration ◽  
Plethodon Jordani

Fine Structure of Some Plethodontid (Caudata: Plethodontidae) Spermatozoan Cytoplasmic Droplets

1977 ◽  
Vol 35 ◽  
pp. 616-617
Author(s):  
J. W. E. Wortham ◽  
S. H. Vernick ◽  
J. E. Morrison ◽  
D. R. Patek ◽  
S. M. Thompson
Keyword(s):  
Animal Species ◽  
Chemical Nature ◽  
Vas Deferens ◽  
Light And Electron Microscopy ◽  
Electron Microscopy Level ◽  
Plethodontid Salamanders ◽  
Middle Piece ◽  
Plethodon Jordani ◽  
Mature Spermatozoa ◽  
Desmognathus Ochrophaeus

Spermatozoan cytoplasmic droplets have been noted in a variety of animal species. Although their function and chemical nature is as yet undetermined, Noble and Weber (1) suggested that droplets in plethodontid salamanders are useless vestiges retained on the mature spermatozoa, while Murphy et al. (2) have suggested that the cytoplasmic droplets may play some role in sperm maturation. The object of the present study is to determine the morphology and chemical nature of these droplets at the light and electron microscopy level.In our studies of spermatozoan cytoplasmic droplets, we used the sperm from Plethodon jordani and Desmognathus ochrophaeus (Caudata, Plethodontidae). The droplets were observed in testicular material of both species and from spermatozoa taken from the vas deferens of Desmognathus ochrophaeus, and were most often found associated with the middle piece of the spermatozoa. The droplets were limited by a single membrane and located on the side of the axial rod opposite the undulating membrane and flagellum (Fig. 1 and 2).

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

An experimental study in reducing blood pressure in spontaneously hypertensive rats through extracellular signal-regulated kinase inhibition

2010 ◽  
Vol 34 (8) ◽  
pp. S31-S31
Author(s):  
Li Jing ◽  
Jian‑zhong Zhang ◽  
Jin‑ping Sun ◽  
Xin An ◽  
Feng‑ying Guo ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Experimental Study ◽  
Spontaneously Hypertensive Rats ◽  
Hypertensive Rats ◽  
Kinase Inhibition ◽  
Spontaneously Hypertensive ◽  
Extracellular Signal Regulated Kinase ◽  
Extracellular Signal

An Experimental Study of Some Properties of Stuttered Words

1962 ◽  
Vol 5 (4) ◽  
pp. 387-394 ◽  
Author(s):  
Bruce Quarrington ◽  
Jerome Conway ◽  
Nathan Siegel
Keyword(s):  
Experimental Study

Experimental study of total body washout employing extracorporeal circulation and hypothermia

1974 ◽  
Vol 126 (2) ◽  
pp. 243-248
Author(s):  
A WAKABAYASHI ◽  
T KUBO ◽  
K CHARNEY ◽  
Y NAKAMURA ◽  
J CONNOLLY
Keyword(s):  
Experimental Study ◽  
Extracorporeal Circulation ◽  
Total Body
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