scholarly journals PREPARATORY STAGES OF ICTHYURA PALLA, French, WITH NOTES ON THE SPECIES

1885 ◽  
Vol 17 (3) ◽  
pp. 41-44
Author(s):  
G. H. French
Keyword(s):  
Young Larva ◽  
Yellowish Green ◽  
Orange Yellow ◽  
Small Spot

Egg.—Globular, a little flattened at base, smooth; color orange yellow. Duration of this period, 24 days.Young Larva.—Length .08 of an inch. Color pale brownish green. Head and a small cervical shield jet black. Each segment has about six blackish tubercles from which arise rather long gray hairs, the dorsal tubercles on segments 5 and 12 a little more prominent than the others. Duration of this period, 3 days.After First Moult.—Length .14 of an inch. Color pale yellowish green. Head black, as also a plate and a small spot on the top of the second segment. To each segment six purplish black slightly tubercular spots; those on the dorsum faint except those on 5 and 12, which are prominent, each pair confluent; a few hairs from each spot. Thoracic feet black. Duration of this period, 4 days.

scholarly journals PREPARATORY STAGES OF TETRACIS TRIANGULIFERATA, Pack

1886 ◽  
Vol 18 (6) ◽  
pp. 105-107
Author(s):  
G. H. French
Keyword(s):  
Posterior Part ◽  
Young Larva ◽  
Transverse Line ◽  
Yellowish Green

Egg.—Elongate or oval, .03 of an inch long by .025 of an inch wide, ribbed longitudinally like a muskmelon by about 15 ribs; color pale yellowish green. Duration of this period 8 days.Young Larva.—Length .10 of an inch; cylindrical, with 10 legs; grayish white, without marks except a bright scarlet transverse line across the posterior part of joint 2, jaws the same color, legs concolorous, the six thoracic slightly pink tinted. Duration of this period 6 to 7 days.

Ultra-spatially resolved synchrotron powered FT-IR microspectroscopy of individual cells of biological material

1995 ◽  
Vol 53 ◽  
pp. 884-885
Author(s):  
David L. Wetzel ◽  
John A. Reffner ◽  
Gwyn P. Williams
Keyword(s):  
Thermal Noise ◽  
Spot Size ◽  
Acquisition Time ◽  
Thermal Source ◽  
Signal To Noise ◽  
Spatially Resolved ◽  
Good Spatial Resolution ◽  
Small Spot ◽  
Ft Ir ◽  
Ir Microspectroscopy

Synchrotron radiation is 100 to 1000 times brighter than a thermal source such as a globar. It is not accompanied with thermal noise and it is highly directional and nondivergent. For these reasons, it is well suited for ultra-spatially resolved FT-IR microspectroscopy. In efforts to attain good spatial resolution in FT-IR microspectroscopy with a thermal source, a considerable fraction of the infrared beam focused onto the specimen is lost when projected remote apertures are used to achieve a small spot size. This is the case because of divergence in the beam from that source. Also the brightness is limited and it is necessary to compromise on the signal-to-noise or to expect a long acquisition time from coadding many scans. A synchrotron powered FT-IR Microspectrometer does not suffer from this effect. Since most of the unaperatured beam’s energy makes it through even a 12 × 12 μm aperture, that is a starting place for aperture dimension reduction.

NOTES ON INCISALIA AUGUSTUS

1904 ◽  
Vol 36 (5) ◽  
pp. 136-136
Author(s):  
John H ◽  
H. Cook
Keyword(s):  
Vaccinium Corymbosum ◽  
The Body ◽  
Unripe Fruit ◽  
Yellowish Green ◽  
Pile Length ◽  
Dorsal Stripe

On the 6th of June 1903, we found a Thecla caterpillar unknown to us feeding openly upon the berries of Vaccinium corymbosum. Its general colour was bright yellowish-green, which served to render it comparatively inconspicuous while feeding in the midst of a cluster of the unripe fruit. A faint, draker, dorsal stripe and a very minute coral-red spot in the middle of each segment, just above the lateral fold, were the only markings. The head was of a uniform light brown, and the body was clothed with short pile. Length, 12 mm.

scholarly journals Small-spot interference pattern for single-step 2D integration and wide wavelength detuning of planar Bragg gratings

2003 ◽  
Vol 39 (14) ◽  
pp. 1050 ◽  
Author(s):  
C.B.E. Gawith ◽  
G.D. Emmerson ◽  
S.G. McMeekin ◽  
J.R. Bonar ◽  
R.I. Laming ◽  
...  
Keyword(s):  
Interference Pattern ◽  
Bragg Gratings ◽  
Single Step ◽  
Small Spot

scholarly journals On the fluorescence and channelled absorption of bismuth at high temperatures

1925 ◽  
Vol 107 (744) ◽  
pp. 760-762 ◽  
Keyword(s):  
Fine Structure ◽  
Absorption Spectra ◽  
High Temperatures ◽  
Royal Society ◽  
Visible Region ◽  
Compressed Air ◽  
Orange Yellow ◽  
Fluorescent Radiation ◽  
Absorption Chamber

In a paper recently communicated to the Royal Society, experiments dealing with the absorption spectra of several metals were described, in which it was found that bismuth vapour shows both lines and bands in absorption. The banded spectrum consists of three groups of bands, each group consisting of a number of bands degraded towards the red, the group of bands in the visible region appearing at high temperatures. In the above experiments it was hoped that by raising the temperature of the absorption chamber sufficiently high, and raising the absorption in the lines of the several bands, it might be possible to detect a fine structure in some of these bands. Accordingly, the author modified the furnace previously used so as to blow through it a larger quantity of compressed air, and succeeded finally by using coke and this furnace to obtain a temperature of about 1500°C. to 1600°C. At this temperature the vapour emitted a fluorescent radiation orange yellow in colour.

EARLY STAGES OF FIDONIA NOTATARIA, Walk

1882 ◽  
Vol 14 (10) ◽  
pp. 199-200 ◽  
Author(s):  
L. W. Goodell
Keyword(s):  
Pinus Strobus ◽  
White Hair ◽  
The Body ◽  
White Stripe ◽  
Yellowish Green ◽  
Yellow Body ◽  
Bright Green ◽  
Deep Green ◽  
Pale Green ◽  
Dorsal Stripe

Eggs.—Oblong, covered with hexagonal depressions and bright green in color. Length 0.6 mil.; width 0.3 mil. Duration of egg stage 12 days.Young Larva.—Length 2 mil.; head twice as wide as the body, round and deep ochre yellow; body dull yellowish green with a faint paler stigmatal stripe.Mature Larva.—Body of uniform thickness, deep green with a narrow sub-dorsal and stigmatal white stripe, and a dorsal greenish-white hair line; dorsal space pale green; ventral space yellowish green. Head brownish green with a lateral white stripe which is a continuation of the sub-dorsal stripe of the body. Length at rest 25 to 26 mil.; when crawling, 26 to 27 mil. Food plant, Pinus strobus. Duration of larva stage, 35 to 40 days. Described from 57 specimens.

scholarly journals Optical and Structural Properties of a Eu(II)-Doped Silico-aluminate with Channel Structure and Partial Site Occupation

2007 ◽  
Vol 62 (12) ◽  
pp. 1535-1542 ◽  
Author(s):  
Andreas Rief ◽  
Frank Kubel ◽  
Hans Hagemann
Keyword(s):  
Channel Structure ◽  
Yellow Luminescence ◽  
Large Shift ◽  
3 Dimensional ◽  
Site Occupation ◽  
Orange Yellow ◽  
Linear Behavior ◽  
Bright Orange ◽  
Wyckoff Position ◽  
The Eu

A new barium silico-aluminate phase with the stoichiometry Ba13.35(1) Al30.7Si5.3O70 has been found and characterized. The compound crystallizes in the space group P63/m (No. 176) with a = 15.1683(17), c = 8.8708(6) Å, V = 1767.5(4) Å3, Z = 1, Rw = 0.026, 32 refined parameters. A 3-dimensional matrix of Al/SiO4 tetrahedra with Ba(II) ions located in channels along the c axis builds up the structure. One of these channels is partially filled with Ba(II) ions (CN 6+3) in Wyckoff position 2a, leaving ~ 1/3 of the positions empty. The second and third type of Ba(II) ions occupy channels orientated along the c axis with CN 4+2+2 and 4+3+1, respectively. The structure shows a rare clustered arrangement of six tetrahedra filled exclusively by Al(III) and therefore is an exception to Loewenstein’s rule. The other tetrahedral positions show an Al to Si ratio of ~ 4 : 1. The Al/Si-O bond lengths in the tetrahedral Al/Si positions drawn vs. site occupation show linear behavior similar to the prediction by Vegard’s rule for solid solutions. After doping with Eu(II) the compound shows bright orange-yellow luminescence with an unusual large shift of the Eu(II) emission band.

Sign in / Sign up

Export Citation Format

Share Document