Electronic properties of α-graphyne on hexagonal boron nitride and α-BNyne substrates

Distinct band gaps appear in both of the heterostructures, while the linear band structure is retained in α-GY/α-BNy.

Random amplified polymorphic DNA (RAPD) analysis of Pasteurella multocida and Manheimia haemolytica strains isolated from cattle, sheep and goats

n this study, 30, 15 and 1 strains of <i>Pasteurella multocida</i> and 9, 8 and 6 strains of <i>Mannheimia haemolytica</i> from cattle, sheep and goats isolated in Elazig province located in the East of Turkey, respectively were typed by random amplified polymorphic DNA (RAPD) assay using a random primer (OPA-11). By RAPD assay, two and three distinct band profiles were obtained in the examination of <i>P. multocida</i> isolates from cattle and sheep, respectively. However, <i>M. haemolytica</i> isolates from cattle, sheep and goats showed only one profile and these strains were not discriminated by RAPD. This study showed that little genetic heterogeneity exists among <i>P. multocida</i> and <i>M. haemolytica</i> isolates from lungs of cattle, sheep and goats.

Booms and Busts in the Deep

Deep sea (5 km) pressure and velocity at the Hawaii-2 Observatory (H2O), midway between Hawaii and California, exhibit a number of remarkable features that are interpreted using the Longuet–Higgins theory of acoustic radiation from oppositely directed surface waves. A change in the slope of the bottom spectra near 5 Hz can be associated with a transition near 2.5 Hz (25-cm wavelength) of the surface wave spectrum from the classical κ−4 saturated (wind independent) Phillips spectrum to a distinct band of ultragravity waves. Bottom spectra are remarkably stable. Occasional 15-dB busts in the gravities and booms in the ultragravities are prominent features in the bottom records and can be associated with calms and storms at the sea surface. For strong winds, two broad lobes in the directional spectrum of the gravity waves are nearly perpendicular to the wind; as the wind drops, the lobes become narrower and more nearly aligned with the wind, leading to busts.

Application of Random Amplified Polymorphic DNA Markers for Identification of Marula Genotypes

Twenty-four genotypes of marula (Sclerocarya birrea subsp. caffra) were characterized using randomly amplified polymorphic DNA (RAPD) analysis. A distinct band pattern was obtained for each of the trees, using as few as four arbitrary 10-mer primers. Trees propagated vegetatively by grafting showed identical fingerprints. These results suggest that RAPD markers provide a useful system for documenting the identity of marula genotypes.

Strontium Labelling for Verifying Daily Growth Increments in the Statolith of the Short-Finned Squid (Illex illecebrosus)

Shrimp soaked in strontium chloride solution were fed to short-finned squid (Illex illecebrosus). The strontium was deposited in the statolith of the squid where, with the use of an electron microprobe, it was detectable as a distinct band on the ground surface of the statolith. Strontium X-ray maps and corresponding back-scattered electron images in the atomic contrast mode were obtained. Use was made of a strontium X-ray line profile to discriminate between markings deposited only 2 d apart. Micrographs were compared with light micrographs to verify the daily growth increments.