Temperature Effects on Aphid Transmission of Nonpersistent Viruses with Notes on Morphological Variation Within Clones of Aphids with Differing Vector Efficiencies1234

1970 ◽  
Vol 63 (2) ◽  
pp. 484-490 ◽  
Author(s):  
John N. Simons ◽  
V. F. Eastop
Keyword(s):  
Morphological Variation ◽  
Temperature Effects ◽  
Aphid Transmission ◽  
Nonpersistent Viruses

Characterization of carbides in M50NiL

1991 ◽  
Vol 49 ◽  
pp. 606-607
Author(s):  
L. S. Lin ◽  
K. P. Gumz ◽  
A. V. Karg ◽  
C. C. Law
Keyword(s):  
Temperature Effects ◽  
Base Composition ◽  
Lattice Parameter ◽  
Control Surface ◽  
Carbide Formation ◽  
Particle Sizes ◽  
Low Carbon ◽  
Fee Structure ◽  
Heat Treated

Carbon and temperature effects on carbide formation in the carburized zone of M50NiL are of great importance because they can be used to control surface properties of bearings. A series of homogeneous alloys (with M50NiL as base composition) containing various levels of carbon in the range of 0.15% to 1.5% (in wt.%) and heat treated at temperatures between 650°C to 1100°C were selected for characterizations. Eleven samples were chosen for carbide characterization and chemical analysis and their identifications are listed in Table 1.Five different carbides consisting of M6C, M2C, M7C3 and M23C6 were found in all eleven samples examined as shown in Table 1. M6C carbides (with least carbon) were found to be the major carbide in low carbon alloys (<0.3% C) and their amounts decreased as the carbon content increased. In sample C (0.3% C), most particles (95%) encountered were M6C carbide with a particle sizes range between 0.05 to 0.25 um. The M6C carbide are enriched in both Mo and Fe and have a fee structure with lattice parameter a=1.105 nm (Figure 1).

Morphological variation inNepeta nuda L

1982 ◽  
Vol 93 (1-2) ◽  
pp. 71-76
Author(s):  
S. Kokkini ◽  
D. Babalonas
Keyword(s):  
Morphological Variation

Morphological variation of Synedra rumpens Kuetz. var. fragilarioides Grun.

1991 ◽  
Vol 27 (1) ◽  
pp. 139-162
Author(s):  
Hiroshi FUKUSHIMA ◽  
Tsuyako KO-BAYASHI ◽  
Mika KURIHARA ◽  
Harue OHTSUKA
Keyword(s):  
Morphological Variation
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