Non-invasive assessment of leaf water status using a dual-mode microwave resonator.

The water status in plant leaves is a good indicator for the water status in the whole plant revealing stress if the water supply is reduced. The analysis of dynamic aspects of water availability in plant tissues provides useful information for the understanding of the mechanistic basis of drought stress tolerance, which may lead to improved plant breeding and management practices. The determination of the water content in plant tissues during plant development has been a challenge and is currently feasible based on destructive analysis only.

Suppression of well-established tumour xenografts by a hybrid-hybrid monoclonal antibody and vinblastine.

The hybrid-hybrid monoclonal antibody 28-19-8 has specificity for the tumour-associated antigen carcinoembryonic antigen and the vinca alkaloids. This bifunctional antibody has been used to target unmodified vinblastine sulphate to well-established MAWI human tumour xenografts implanted in nude mice. The highly significant suppression of tumour growth achieved throughout treatment has also been sustained for over 2 months after the withdrawal of treatment.

Indium-111-radiolabeled guinea pig peripheral leukocytes. In vivo distribution and response to leukotriene B4.

The preparation of indium-111 tropolonate-radiolabeled guinea pig peripheral mixed white cells (greater than 80% neutrophils) is described. Autologous rather than homologous cells are required to provide a population of labeled, functional cells on reintroduction to the animals. Surgery has been shown to result in a profound neutropenia from which the animals must recover before removal of blood for cell preparation.