Technological modeling of physicochemical removal of iron from deep groundwater.

In view of the significant difficulties arising in controlling the operation of the rapid iron removal filters on the basis of full exhaustion of their clarifying resource at every calculation stage (filter run), it is suggested to realize a simple control algorithm, which assumes an equal duration of filter runs during the entire service life of one filtering material change. Since the efficiency of physicochemical iron removal depends significantly on the specified duration, in order to establish its optimal value in every given case it is necessary to perform a special technical and economic analysis with a detailed consideration of the composition and degree of contamination of natural water. In the working conditions considered above, which are typical for physicochemical iron removal from deep groundwater in Ukraine, such a value was 600 conventional units, which corresponds to 48 h.

Comparison of 2D and autostereoscopic 3D visualization during mixed reality simulation.

Purpose: In general minimally invasive surgical procedures, surgeons are tied to 2D visualization, leading to the loss of depth perception. This can lead to large mental load for the surgeons and may be responsible for the long learning curve. To restore the sense of depth, this study investigated the use and benefits of an autostereoscopic (3D) display during a simulated laparoscopic task.

[Abnormal floral meristem development in transgenic tomato plants do not depend on the expression of genes encoding defense-related PR-proteins and antimicrobial peptides].

In this study, the morphological and cytoembryological analyses of the tomato plants transformed with the genes encoding chitin-binding proteins (ac and RS-intron-Shir) from Amaranthus caudatus L. andA. retroflexus L.

[The role of interphase prenucleolar bodies in the recovery of the nucleolar structure after reversible hypotonic treatment].

Interphase prenucleolar bodies are globular structures which accumulate in large numbers in the nucleoplasm of cultivated cells after hypotonic treatment and subsequent return to isotonic conditions; detailed studies of the role of these structures in the recovery of the nucleolus have not yet been performed. The limited mobility of interphase pronucleoli within the nucleus has been demonstrated. Exchange of the major nucleolar protein B23 between prenucleolar bodies and the surrounding nucleoplasm, rather than stable binding of this protein to the prenucleolar bodies, has been demonstrated using fluorescence recovery after photobleaching method.

[Structural-functional characteristics of cervical vessels in hypertensive patients under changed atmospheric pressure].

The ultrasonic location technique was used to measure intima-media thickness (IMT), as well as internal systolic diameter of and linear blood velocity in the cervical arteries in people with initial hypertension. Correlation analysis elicited a temporal contingency between these parameters and daily average values of atmospheric pressure. Thus, common carotid artery IMT tended to increase on high-pressure days.