منابع مشابه
Bringing nature to the fore.
This article has two aims: first, to give an historic overview of the nature-nurture debate in relation to how mothers learn to breastfeed. The overview will relate how the 'nurture' perspective came to dominate our understanding of the ontogeny of breastfeeding. The second aim is to propose professional breastfeeding competencies in an attempt to integrate the 'nature' perspective within early...
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The YABBY gene family was identified recently by homology to CRABS CLAW, a gene involved in carpel and nectary development in Arabidopsis. Several of the transcription factors encoded by the YABBY genes appear to have conserved roles in specifying abaxial cell fate in leaves, floral organs and ovules.
متن کاملStress Brings Memories to the Fore
A common feature of post-traumatic stress disorder and various mood and anxiety disorders is the formation of negative associations with neutral stimuli, or the recall of negative memories stimulated by unrelated, neutral circumstances. However, the contribution of stress itself to these phenomena is unclear. Now, Fenton and colleagues have shown that in rats stress can reactivate memories that...
متن کاملRibozymes
The discovery in 1982 that an intron of the protozoan Tetrahymena can excise itself from precursor ribosomal RNA in the absence of protein challenged the belief that only proteins can act as biological catalysts. The new field of RNA enzymology emerged to study such phenomena, and catalytic RNAs have now been shown to fold up to form complex three-dimensional surfaces that can bind specific sub...
متن کاملFirst impressions of the Fore
On this day of celebration and historical memories I thought it would be interesting to reflect on what I had written in my field diary during the first few weeks of anthropological research, which Robert Glasse and I began in July 1961. What were our first impressions of the Fore, and what were the first interactions between the Fore and ourselves? After we stopped overnight at Okapa in the No...
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ژورنال
عنوان ژورنال: Nature
سال: 1997
ISSN: 0028-0836,1476-4687
DOI: 10.1038/386141b0