منابع مشابه
A question of fate
clusters of coloured balls are three-dimensional models of the developing embryo of the nematode worm, Caenorhabditis elegans. The embryos develop according to a standard pattern, the cell lineage of which was originally worked out by directly observing cells in thousands of embryos under the microscope. But with the advent of 'four-dimensional microscopy', the entire development of one embryo ...
متن کاملA question of fate
Ever since the discovery of neural stem cells in the mammalian brain, the possibility of brain tissue regeneration has captured the minds of scientists, clinicians, and the public. Neural stem cells have been envisioned as a source of donor cells for transplantation and vectors for the delivery of gene therapy. Over the past decade, many researchers have contributed to characterizing these cell...
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This paper is an attempt to discuss the concept of madness and its differentcauses and functions in Bessie Head’s semiautobiographical novel A Question ofPower. It aims to explore the multifaceted insanity of Elizabeth the exiled coloredprotagonist in terms of different theories. We will see how once a devastatingtrauma turns out to be a habilitating schizophrenia. Head challenges the readers’n...
متن کاملRetinoic Acid Determines the Fate of Spermatogonia
In this review, we aim to examine the effect of extrinsic and intrinsic factors on spermatogenesis process taking into account a complex signaling pathway. Primarily, it is suggested that retinoic acid (RA) has a vital function in spermatogenesis process and it is considered to be essential for completion of spermatogonia into mature spermatozoa. In the present review, the key effects of retino...
متن کاملSecondary Malignant Transformation of Giant Cell Tumor of Bone: Is It a Fate?
The malignant transformation of conventional giant cell tumor of bone (GCTOB) is rare and usually occurs with irradiation. Here we report two neglected cases of conventional GCTOB with spontaneous malignant transformation at 11 and 16 years after initial diagnosis. In the former case, the patient refused to receive any treatment following the incisional biopsy, and in the latter, the firs...
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ژورنال
عنوان ژورنال: PLOS Biology
سال: 2017
ISSN: 1545-7885
DOI: 10.1371/journal.pbio.2002329