Extrusion fountains are hallmarks of chromosome organization emerging upon zygotic genome activation.

The first activation of gene expression during development (zygotic genome activation, ZGA) is accompanied by massive changes in chromosome organization. The connection between these two processes remains unknown. Using Hi-C for zebrafish embryos, we found that chromosome folding starts by establishing "fountains", novel elements of chromosome organization, emerging selectively at enhancers upon ZGA.

Silver Vapor Supersonic Jets: Expansion Dynamics, Cluster Formation, and Film Deposition.

Supersonic jets of metal vapors with carrier gas are promising for producing nanostructured metal films at relatively low source temperatures and high deposition rates. However, the effects of the carrier gas on the jet composition and expansion dynamics, as well as on film properties, remain virtually unexplored. In this work, the free-jet expansion of a mixture of silver vapor with helium in a rarefied regime at an initial temperature of 1373 K is investigated through mass spectrometry and direct-simulation Monte Carlo methods.

The analysis of methylation of DNA promoter of SFRP2 gene in patients with hyperplastic processes of the endometrium.

Unlabelled: The hyperplastic processes of the endometrium can arise not only against the background of excessive influence of estrogen, but also against the background of epigenetic damages that affect apoptosis, cell proliferation, differentiation, and adhesion, and DNA reparation. The aim of our study was to investigate and analyze the status of methylation of the promoter of SFRP2 gene in patients with hyperplastic processes of the endometrium.

Materials And Methods: The study groups were the following: I - patients with endometrial hyperplasia (EH, n = 9); II - patients with endometrial intraepithelial neoplasia (EIN, n = 10), III - control groups: 1) with endometrial cancer (EC, n = 4), and 2) healthy women (n = 4).

Laparoscopic Treatment in Children with Hydatid Cyst of the Liver.

Background: There is no consensus on the surgical treatment of children with hydatid cyst of the liver (HCL). We evaluated the outcomes of laparoscopic and open surgery for childhood HCL.

Methods: We performed 81 open surgery and laparoscopic procedures in 37 (45.