scholarly journals A NEW FORM OF PRIONIA, AND NOTES ON PLATYPTERYX ARCUATA AND P. GENICULA

1893 ◽  
Vol 25 (1) ◽  
pp. 24-24
Author(s):  
George. H. Hudson

Prionia levis, n. var. or sp.Primaries without the delicate frosted or silvery appearance, and without the numerous short, fine, strigate, brown lines of bilineata. The brown scales are present, but are uniformly and evenly distributed, save where they form the two brown lines which cross the wing, and a little darker shading near the outer edge and apex. These two transverse lines are about a third wider apart that in bilineata, the second narrowly edged externally with the clear, pale yellow ground-colour of the wing.

1883 ◽  
Vol 15 (5) ◽  
pp. 97-98
Author(s):  
D. W. Coquillett

On the 10th of July I found a pupa of this species suspended by the hind end of its body beneath a log. The 1arval skin was rent and worked backward, but still retained nearly its original shape and color, and by comparing it with certain larvæ which I have frequently met with in similar situations, there is no doubt in my mind but that these latter belong to the above species.These larvæ very closely resemble that figured by Packard on page 465 of his “Guide” (fig. 432), which in the text on the succeeding page is referred to Photuris. The dried specimens now before me measure about 12 mm., and are of a dull purplish-brown color; venter pale yellow, tinged with pink and marked with a brownish stripe on each outer edge, and with two rows of brown spots, these not extending upon the first three segments; head retractile, dull blackish, the region of the jaws polished brown, and furnished with four black prickles, the upper two of which are placed transversely, the lower two longitudinally.


1905 ◽  
Vol 37 (1) ◽  
pp. 15-16
Author(s):  
W. D. Kearfott

Aristotelia Youngella, sp. nov.—Head. antennæ, palpi, thorax abdomen and legs shining iridescent green. Basal half of front wing and outer half along costa black or very dark brown, heavily overlaid with iridescent green. The dark basal half is outwardly margined by the black ground colour, owing to absence of the iridescent scales at this point. All the outer half of wing, except the dark costal streak, is dull ochreous, inwardly margined by a pale yellow line, the latter adjoining the dark line of ground colour outlining the basal half.


1942 ◽  
Vol 74 (3) ◽  
pp. 52-56 ◽  
Author(s):  
A. W. A. Brown ◽  
W. C. McGuffin

Penultimate Instar. Head width 1.0 to 1.3 mm. Body length 7 to 10 mm. Otherwise similar to ultimate instar.Ultimate Instar. Head width 1.3 to 1.5 mm. Body from 9 to 11 mm. long and from 1.5 to 1.7 mm. wide; shape subcylindrical, broadest at first abdominal segment, eighth abdominal segment with a dorsal swelling; skin densely covered with minute conical granules; ground colour pale yellow, cream-coloured, or greyish-white, heavily mottled with dark brown, dark grey, or ruddy-brown, often with a pink suffusion, venter lightly tinged with reddish-brown or even green.


1897 ◽  
Vol 29 (2) ◽  
pp. 39-42
Author(s):  
WM. Barnes

♂.—Upper surface very much like Cybele; differs from Leto in the lighter shade of the ground colour and the much darker and more extensive basal area. This area is sharply limited at the outer edge and extends to the median row of markings, which on the hind wings are quite obscured by it. The apical region is not so clear as in Leto, the row of round spots in the outer belt continuing of large size up to the costa, and the dark blotch lying just within the upper three spots is very prominent, as in Cybele.


1979 ◽  
Vol 46 ◽  
pp. 77-88
Author(s):  
Edward L. Robinson

Three distinct kinds of rapid variations have been detected in the light curves of dwarf novae: rapid flickering, short period coherent oscillations, and quasi-periodic oscillations. The rapid flickering is seen in the light curves of most, if not all, dwarf novae, and is especially apparent during minimum light between eruptions. The flickering has a typical time scale of a few minutes or less and a typical amplitude of about .1 mag. The flickering is completely random and unpredictable; the power spectrum of flickering shows only a slow decrease from low to high frequencies. The observations of U Gem by Warner and Nather (1971) showed conclusively that most of the flickering is produced by variations in the luminosity of the bright spot near the outer edge of the accretion disk around the white dwarf in these close binary systems.


Author(s):  
W. H. Zucker ◽  
R. G. Mason

Platelet adhesion initiates platelet aggregation and is an important component of the hemostatic process. Since the development of a new form of collagen as a topical hemostatic agent is of both basic and clinical interest, an ultrastructural and hematologic study of the interaction of platelets with the microcrystalline collagen preparation was undertaken.In this study, whole blood anticoagulated with EDTA was used in order to inhibit aggregation and permit study of platelet adhesion to collagen as an isolated event. The microcrystalline collagen was prepared from bovine dermal corium; milling was with sharp blades. The preparation consists of partial hydrochloric acid amine collagen salts and retains much of the fibrillar morphology of native collagen.


Author(s):  
M.K. Lamvik ◽  
L.L. Klatt

Tropomyosin paracrystals have been used extensively as test specimens and magnification standards due to their clear periodic banding patterns. The paracrystal type discovered by Ohtsuki1 has been of particular interest as a test of unstained specimens because of alternating bands that differ by 50% in mass thickness. While producing specimens of this type, we came across a new paracrystal form. Since this new form displays aligned tropomyosin molecules without the overlaps that are characteristic of the Ohtsuki-type paracrystal, it presents a staining pattern that corresponds to the amino acid sequence of the molecule.


2013 ◽  
Author(s):  
Joshua Wilt ◽  
William Revelle

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