The Effect of Cytokinins on Vitrification in Melon and Carnation

The influence of exogenous cytokinin on vitrification of melonand carnation buds grown in vitro was assessed. In melon, theanatomical traits of vitrification were found to be similarto those previously described for carnation grown on a highconcentration of auxin. In carnation, the plantlets treatedwith high cytokinin concentrations became bushy but the anatomicalstructure remained normal. The relation of cytokinin and vitrificationis discussed. Cucumis melo L., Dianthus caryophyllus L., vitrified plantlets, habituation, cytokinin     

Expression of H-Y Antigen in the Guppy (Lebistes reticulatus)

Expression of a mammalian cross-reactive H-Y antigen on the surface of cells derived from the male guppy ( Lebistes reticulatus ) is demonstrated. This finding further establishes the evolutionary conservation of H-Y antigen among lower vertebrates and provides a basis for speculation on the possible evolutionary association between H-Y antigen and sex determination.     

Evidence for an H-Y Crossreactive Antigen in Invertebrates

A sex specific antigen which crossreacts with the mammalian H-Y antigen has been identified on the cell surface of hemocytes from the lobster ( Homarus americanus ) and the gonadal cells of three insect species. The hemocytes from the male lobster, the testicular cells from the male beetle ( P. cornutus ), and the ovarian cells from two Orthopteran species ( L. maderae and D. punctata ) specifically absorbed H-Y antibodies. The specificity of H-Y antibody absorptions by cells from only one sex, suggest that an ancestral H-Y-like antigen may be present in invertebrates which could be engaged in sexual (cellular) recognition events.     

RECLAIMING THE PATIENT'S VOICE AND SPIRIT IN DYING: AN INSIGHT FROM ISRAEL

In the latter half of the 20th century, Western medicine moved death from the home to the hospital. As a result, the process of dying seems to have lost its spiritual dimension, and become a matter of prolonging material life by means of medical technology. The novel quandaries that arose led in turn to medico‐legal regulation. This paper describes the recent regulation of dying in Israel under its Dying Patient Law, 2005. The Law recognizes advance directives in principle, but limits their effect and form through complex medico‐legal artifices. It reflects a culture that places high value on both scientific medicine and the sanctity of life as such, and illustrates a medical culture that pitches battle against death. At the same time, the Law constructs the will of the individual in a medico‐legal language that is alien to the lay person. The paper suggests an alternative approach to advance care planning that is patient‐centred and addresses the psycho‐social needs of the individual in terms of her relational autonomy. From this perspective, advance care planning becomes an opportunity to extract the patient from the medical context and allow her to speak about her approaching death with close ones in her own terms of reference. To this end, there is a need for facilitation of an intimate encounter where patients can speak about their concerns with their loved ones. The paper also presents a methodological approach of attentive listening, which can be applied across diverse cultures and circumstances.