the ontogeny of the gill structure in starlet ( acipenser ruthenus ) was studied histologically from hatching up to 50 days post hatching (dph). based on the obtained results, the first developmental phase of the biological systems in this species was started from hatching with an intense organogenesis and the second phase from 9 dph with the beginning of exogenous feeding. the gill anlage was ...

In this article it is argued that the Qur’an’s doctrine of divine mercy best understood in light its pessimistic anthropology, an aspect text often underappreciated. The so-called “primordial covenant” verse (Q 7:172) Qur’an holds humans responsible for submission to God. Qur’anic language on “signs” natural world suggests should recognize God (and be grateful Him) by reflection nature alone. Y...

Segregation of the germ line from the soma is an essential event for transmission of genetic information across generations in all sexually reproducing animals. Although some well-studied systems such as Drosophila and Xenopus usematernally inherited germ determinants to specify germ cells, most animals, including mice, appear to utilize zygotic inductive cell signals to specify germ cells duri...

Evidence has accumulated that adult hematopoietic tissues and other organs contain a population of dormant stem cells (SCs) that are more primitive than other, already restricted, monopotent tissue-committed SCs (TCSCs). These observations raise several questions, such as the developmental origin of these cells, their true pluripotent or multipotent nature, which surface markers they express, h...

The model of the homogenous and isotropic universe is considered in which the coordinate system of reference is not defined by the matter but is a priori specified. The scale factor of the universe changes following the linear law. The scale of mass changes proportional to the scale factor. The temperature of the relativistic matter changes inversly proportional to the root of the scale factor....

We have studied ways in which helical primordial magnetic fields could be constrained by measurements of the cosmic microwave background radiation (CMBR). If there were helical flows in the primordial plasma at the time of recombination, they would produce parity violating temperature-polarization correlations (C l and C EB l ). However, the magnitude of helical flows induced by helical magneti...

The three-year WMAP(WMAP3), combined with other cosmological observations from galaxy clustering and Type Ia Supernova (SNIa), prefers a non-vanishing running of the primordial spectral index independent of the low CMB multipoles. Motivated by this feature we study cosmological constraint on the neutrino mass, which severely depends on what prior we adopt for the spectral shape of primordial fl...

We report on the use of AI techniques – including image analysis, feature recognition, machine learning and constraint satisfaction – applied to the problem of determining the population of primordial follicles in a human ovary. We highlight the importance of accurate population data for studies that aim to predict the age of menopause in healthy women, and for studies that quantify damage to o...

Antennapedia-class vertebrate homeobox genes have been classified with regard to their chromosomal locations and nucleotide sequence similarities within the 183-base-pair homeobox domain. The results of these comparisons support the view that in mammals and most likely the vertebrates, four clusters of homeobox genes exist that were created by duplications of an entire primordial gene cluster. ...