Updating of sewage - purification facilities of electroplating enterprises with counterflow ion-exchange filters

The paper focuses on work of electroplating sewage-purification facilities of mechanical engineering production; drawbacks caused by specific features of physical and chemical processes of coagulation and technological malfunctions have been revealed. Additional equipment - ion-exchanging filters have been selected on the basis of designed methods, they make it possible for enterprises of mechanical engineering to implement conversion to water rotation systems

Specyfika formowania samoskrętnej przędzy w asymetrycznym urządzeniu torsyjnym

The authors of the article offer an asymmetrical arrangement of air-jet nozzles in the aerodynamic torsion device (ATD). They show the practicability of using such an ATD for the formation of a self-twisted structure of the yarn, including those containing pre-stretched elastomer. The authors calculated the levels of twist of the left-hand and right-hand components, taking into account tolerances used for the mechanical torsion device, constructed according to the asymmetric design.Autorzy artykułu zaproponowali asymetryczne usytuowanie pneumatycznych dysz powietrznych w aerodynamicznym urządzeniu skręcającym (ATD). Rozważyli możliwość wprowadzenia tego urządzenia do formowania samoskrętnej struktury nici wykończalniczych, zawierających w sobie wstępnie rozciągnięty elastomer. Dokonali obliczeń poziomów liczby skrętu obu komponentów wspomnianych nici i uwzględnili tolerancje stosowane w urządzeniu nadającym skręt mechaniczny, skonstruowanym zgodnie z asymetrycznymi założeniami jego ustawienia

INHIBIN A AND HUMAN β-CHORIONIC GONADOTROPIN AS PREDICTORS OF EARLY PRE-ECLAMPSIA AT 16–18 WEEKS OF PREGNANCY

The aim of the study was to examine the levels of human β-chorionic gonadotropin (β-hCG) and inhibin A, as prognostic criteria for the development of early pre-eclampsia at 16–18 weeks of pregnancy. Materials and Methods. The prospective study included 60 patients with singlet pregnancies who underwent their first prenatal screening at 11–13 weeks. The patients were selected from 300 patients using continuous sampling method. According to the gestation course and outcome, the patients were divided into 2 groups: group 1 included 45 women with uncomplicated birth, group 2 consisted of 15 women with pre-eclampsia which developed before the 34th week. Based on calculations of the individual pre-eclampsia risks up to the 34th week of pregnancy according to the results of Astraia program (&gt;1:300), women at 16–18 weeks of pregnancy underwent additional examination to determine inhibin A and β-hCG. Results. In both groups, burdened obstetric and somatic anamnesis prevailed. Uterus fibroids and cervical ectopia were significantly more common in women with pre-eclampsia, developed up to the 34th week of pregnancy. Moreover, the threatened miscarriage prevailed in the second trimester. In the group with pre-eclampsia developed up to the 34th week, β-hCG and inhibin A values were, respectively, &gt;35 ng/ml and &gt;260 pg/ml. The indicators were significantly higher than in the uncomplicated birth group. Conclusions. The individual risk of preeclampsia calculated according to the Astraia program up to the 34th week of pregnancy (&gt;1:300) and elevated levels of inhibin A and β-hCG can be considered the predictors of the early pre-eclampsia development. Keywords: early pre-eclampsia, inhibin A, human β-chorionic gonadotropin.</jats:p