منابع مشابه
The Eagle’s EGGs: fertile or sterile?
We present a deep, high spatial resolution (0.35 arcsec FWHM), near-infrared (1–2.5 μm) imaging survey of the Eagle Nebula, M 16, made with the VLT, centred on the famous elephant trunks. We compare these data with the existing HST optical images to search for evidence of ongoing or recent star formation in the trunks, and in particular in the 73 small evaporating gaseous globules (EGGs) on the...
متن کاملFertile offspring derived from mammalian eggs lacking either animal or vegetal poles.
In all animals so far tested, removing either pole of the undivided egg prevents normal development: embryos may arrest early, lack organs, or the adults may be sterile. These experiments have shown that spatial patterning of the egg is of utmost importance for subsequent development. However, the significance of spatial patterning in mammalian eggs is still controversial. To test the importanc...
متن کاملTranslocation of adenine nucleotides in the mitochondria of male sterile and male fertile sorghum.
The translocation of ATP from the inside to the outside of the mitochondrial membrane has been studied in a male sterile (2219 A) and a male fertile (2219 B) line of sorghum. The translocation of ATP was found to be substantially lower in case of mitochondria from the male sterile line. The affinity of adenine nucleotides to the translocator proteins of the mitochondrial membrane was found to b...
متن کاملSterile or non-sterile gloves for minor skin excisions?
Non-sterile gloves are just as effective as sterile gloves in preventing surgical site infection after minor skin surgeries.
متن کاملEvolution of the fungal self-fertile reproductive life style from self-sterile ancestors.
In most fungal ascomycetes, mating is controlled by a single locus (MAT). Fungi requiring a partner to mate are heterothallic (self-sterile); those not requiring a partner are homothallic (self-fertile). Structural analyses of MAT sequences from homothallic and heterothallic Cochliobolus species support the hypothesis that heterothallism is ancestral. Homothallic species carry both MAT genes in...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2002
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20020589