Now showing items 21-30 of 60
Strategies for biological monitoring - the European experience
Infrared polarimetry of dark clouds. II : Magnetic field structure in the Rho Ophiuchi dark cloud
K-band polarimetry of 20 sources embedded within the densest region of the Rho Oph dark cloud has been obtained. The degree of polarization ranges from 1.1 to 7.4 percent, and the position angles have a bimodal distribution, ...
Systemic infection of petunia by mechanical inoculation with tomato golden mosaic virus
Aangetoond werd dat Petunia hybrida systemisch kan worden geïnfecteerd met het 'tomato golden mosaic virus' (TGMV), een virus dat behoort tot de groep van de geminivirussen. Mechanische inoculatie van petuniaplanten met ...
Effects of experience on microcomputer use in primary schools : results of a second survey
Following an initial survey of microcomputer use in Hertfordshire primary schools, a second, follow-up survey was conducted two years later to examine how experience had changed attitudes and use. This second survey provided ...
Reconstructing an erection and elaborating ejaculation
Personal construct psychotherapy has rarely been applied to sexual disorders. In this paper a constructivist approach is contrasted with alternative methods of treating such problems on three related dimensions concerning ...
Spectropolarimetry of the 3-micron ice band in Elias 16 (Taurus Dark Cloud)
Polarization data between 1.2 and 3.8 μm, including spectropolarimetry in the 3-μm ice feature, are presented for the highly reddened field star Elias 16 in the Taurus Dark Cloud. The polarization is observed to increase ...
Gene amplification and expression in plants by a replicating geminivirus vector
The use of plant DNA viruses as vectors for the transfer of foreign genes to plants offers two potential advantages over other, existing methods of producing transgenic plants. First, these viruses sys-temically infect ...
Forms of bovine pepsinogen in plasma from cattle with three different 'syndromes' of Ostertagia ostertagi infection
Calves infected orally with third stage larvae of Ostertagia ostertagi or infected with adult O ostertagi by direct transplantation into the abomasum had raised plasma pepsinogen activity, as did four-year-old dairy cattle ...