Ovule, seed and seedling characters in Acharia (Achariaceae) with evidence of myrmecochory in the family

An investigation of mature seed structure in Guthriea capensis and ovule-to-seed development in Acharia tragodes indicate that the two species are herbaceous myrmecochores with similar adaptations for seed dispersal and germination. The development and structure of the modified seed tissues, namely a sarcotestal elaiosome, a fringe layer in the mesotesta, endotestal-exotegmic mechanical layers and a chalazal seed lid are described. Additional embryological similarities between the two taxa include, amongst others, sessile ovules, distally lobed outer integuments, zigzag micropyle canals formed by both integuments, bisporic Allium Type embryo sacs, suspensorless embryos belonging to the Penaea Variation of the Asterad Type, and small embryos in the mature seed. In Acharia intraseminal embryo growth occurs before radicle emergence, germination is epigeal and seedlings belong to the Macaranga Type

The outcome of babies 'of mothers with severe Rhesus incompatibility treated at Tygerberg Hospital, 1980 - 1993

No Abstract

Comprehensive study of the reactions induced by 12C on 103Rh up to 33 MeV/nucleon

Abstract Fifty-three excitation functions for the production of radioactive residues in the interaction of 12C with 103Rh have been measured from the Coulomb barrier up to 400 MeV by means of the activation technique. These excitation functions have been analyzed considering complete fusion, incomplete fusion of 8Be and α-particle fragments and, above about 200 MeV, the transfer of either one proton or one neutron from 12C to 103Rh. The emission of pre-equilibrium particles during the thermalization of the excited composite nuclei formed in all these processes and, in the case of 8Be and α incomplete fusion, also the re-emission of α-particles after a mean-field interaction or a few interactions with the target nucleons have been taken into account

Long-range Angular Correlations On The Near And Away Side In P-pb Collisions At √snn=5.02 Tev

7191/Mar294

A first record of Agave decipiens naturalised in southern Africa

Agave decipiens Baker is native to the southern parts of Florida, U.S.A. This alien species is reported from South Africa for the first time. In this report the South African plants are described and illustrated, a tube/sepal ideogram is provided and the status of naturalisation is given

Intravascular intra-uterine transfusions for severe fetal iso-immunisation [19]

LetterThe original publication is available at http://www.samj.org.za[No abstract available]Publisher’s versio

Application of Au + p nuclear reactions for proton beam monitoring up to 70 MeV

Experimentally measured excitation functions are presented for the 197Au(p,n)197mHg, 197Au(p,pn)196Au, 197Au(p,3n)195mHg, 197Au(p,p3n)194Au and 197Au(p,5n)193mHg nuclear reactions up to 70 MeV. The new data are compared with published values, where available. Based on cubic spline fits through the data of the most reliable experimental data sets, recommended excitation function curves are suggested for the above nuclear processes