Role of structure of the Pp/magnetite nanocomposites on their thermal properties

The thermal degradation behaviour of polypropylene and its magnetite composites have been investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Distribution of magnetite nanoparticles in a polymer matrix has been studied by scanning and transmission electron microscopy and also atomic force microscopy. The thermal and mechanical properties of nanocomposites based on polypropylene and magnetite nanoparticles have also been investigated. It has shown that, the introduction of Fe3O4 nanoparticles in polypropylene increases its thermal stability of about 1000C. The maximum increase in the thermal stability of PP was observed in the case of a 20% weight content of Fe3O4 nanoparticles in polypropylene

Economic terminology of the Uzbek language: Sources and methods of development

By the authors of the paper analyzing several properties of the economic terminology of the Uzbek language. In particular, data are given on the research of terms in various fields in Uzbek and world linguistics, interpretations of special terms in the works of linguists, and also considers the systemic characteristics, sources and ways of developing the economic terminology of the Uzbek language. Also paid attention to the process of development of the economic terminology of the Uzbek language based on the internal language potential, namely the methods of affixation, composition, abbreviation, semantic and others. Substantiated the role of borrowing in the development of the language in general and in the enrichment of economic terminology in particular. Considered the views of linguists from different countries on this issue. The opinions of the authors are substantiated by examples, which analyzed during the study

Diagnostic value of ultrasound in the evaluation of the echostructures of the nodular formation of the thyroid gland using the classification system TI-RADS

Objective. Estimation of the ultrasonographic criteria efficacy in accordance to the TI-RADS system while determining the morphological structures of nodal thyroid affections. Materials and methods. Results of ultrasonographic investigation in 546 patients, ageing 17 - 76 old and suffering thyroidal nodal affections, were analyzed. All the patients were divided into two groups. Into the firsr group  (the main) 427 (78.2%) patients were included, to whom ultrasonographic investigation was performed by a surgeon-endocrinologist. Into the second group (the control one) 119 (21.8%) patients were included, to whom ultrasonographic investigation was performed by a radiologist. Ultrasonographic criteria with nodal thyroidal affections were estimated in accordance to the TI-RADS scale, and the results of cytological investigations of the nodal affections - in accordance to criteria of the Bethesda system. The degree of the malignant nodal affections risk was determined, taking into account a quantity of intranodal echographic signs in accordance to the points gradation, using a Ti-RADS system. Results. In accordance to results of pathohistological investigations of the removed specimen a benign changes were revealed in 128 (76.6%) patients, and malignant - in 39 (23.4%). In structure of malignant affections papillary cancer was established in 23 patients, follicular - in 13, medullary - in 2, Hurtle-cellular - in 1 patient. In accordance to cytological investigations, conducted in 2014 - 2018 yrs., there was established, that in the first group a fine-needle biopsy was conducted in 211/427(49.4%) patients. Operative interventions were performed in 105 (24.6%) patients. In the second group a fine-needle biopsy was performed in 64/119 (53.8%) patients. Operative intervention was conducted in 62 (52.1%) patients. Conclusion. While conduction of ultrasonographic investigation by a surgeon-endocrinologist the rate of revealing of false-positive echographic signs have lowered in more than 2 times (1.4%), comparing with analogous index while conduction of the investigation by radiologist (3.1%). Application of a TI-RADS classification have permitted to reduce the rate of the fine-needle biopsy and doing of surgical interventions

COVID-19 infection in adult patients with hematological malignancies: a European Hematology Association Survey (EPICOVIDEHA)

Background: Patients with hematological malignancies (HM) are at high risk of mortality from SARS-CoV-2 disease 2019 (COVID-19). A better understanding of risk factors for adverse outcomes may improve clinical management in these patients. We therefore studied baseline characteristics of HM patients developing COVID-19 and analyzed predictors of mortality. Methods: The survey was supported by the Scientific Working Group Infection in Hematology of the European Hematology Association (EHA). Eligible for the analysis were adult patients with HM and laboratory-confirmed COVID-19 observed between March and December 2020. Results: The study sample includes 3801 cases, represented by lymphoproliferative (mainly non-Hodgkin lymphoma n = 1084, myeloma n = 684 and chronic lymphoid leukemia n = 474) and myeloproliferative malignancies (mainly acute myeloid leukemia n = 497 and myelodysplastic syndromes n = 279). Severe/critical COVID-19 was observed in 63.8% of patients (n = 2425). Overall, 2778 (73.1%) of the patients were hospitalized, 689 (18.1%) of whom were admitted to intensive care units (ICUs). Overall, 1185 patients (31.2%) died. The primary cause of death was COVID-19 in 688 patients (58.1%), HM in 173 patients (14.6%), and a combination of both COVID-19 and progressing HM in 155 patients (13.1%). Highest mortality was observed in acute myeloid leukemia (199/497, 40%) and myelodysplastic syndromes (118/279, 42.3%). The mortality rate significantly decreased between the first COVID-19 wave (March–May 2020) and the second wave (October–December 2020) (581/1427, 40.7% vs. 439/1773, 24.8%, p value < 0.0001). In the multivariable analysis, age, active malignancy, chronic cardiac disease, liver disease, renal impairment, smoking history, and ICU stay correlated with mortality. Acute myeloid leukemia was a higher mortality risk than lymphoproliferative diseases. Conclusions: This survey confirms that COVID-19 patients with HM are at high risk of lethal complications. However, improved COVID-19 prevention has reduced mortality despite an increase in the number of reported cases.EPICOVIDEHA has received funds from Optics COMMITTM (COVID-19 Unmet Medical Needs and Associated Research Extension) COVID-19 RFP program by GILEAD Science, United States (Project 2020-8223)

THE ROLE OF XYLOPHAGY IN THE REGULATION OF THE NUMBER OF TICKS AND THE POSSIBILITY OF ITS USE IN THE BIOLOGICAL STRUGGLE IN THE CONDITIONS OF THE ABSHERON PENINSULA OF AZERBAIJAN

In the forest and fruit conenoses Absheron, identified 37 species xylophagous harmful to forest crops. Of these, 6 species (Lucanus ibericus L., Oructes nasicornis L., Perotis lugubris Sub., Dicerca aenea Sem., Megopis scabricornis Scop., Cerambyx cerdo L.) are the most serious pests. Their bioecological particular economic importance and natural enemies has been studied. We have found that 34 entomophagous play a role in regulation of the number xylophagous. Of these, 12 species have economic value, of which 4 types (Xorides irrigator F., Atanycollus initiator Nees, Nidobius umbratus Mots., Tanasimus formicarius L.) examined in more detail bioecology, distribution and economic valu

INFLUENCE OF FLAVONS ON CA2 + - ACCUMULATING CAPACITY OF RAT LIVER MITOCHONDRIA

After the introduction of catacin into the body, there was a decrease in Ca2 + - the accumulating capacity of liver mitochondria. The introduction of the poison of a spectacled snake (cobra) into the body led to an acceleration of the penetration of the Ca2 + ion into the mitochondria. With the introduction of catacin into the body of an animal poisoned with the venom of a spectacled snake (cobra), a decrease in Ca2 + - the accumulating capacity of mitochondria was observed

ANATOMO-TOPOGRAPHIC AND HYDRODYNAMIC PARAMETERS OF THE EYE AFTER CATARACT PHACOEMULSIFICATION

Background: Removal of the native lens alters spatial relationships between anterior eyeball structures and results in fluctuations in intraocular pressure. Intraocular pressure control is important for the prevention of early postoperative complications. Aim: To study anatomic, topographic and hydrodynamic changes of the eyeball after uncomplicated cataract phacoemulsification with intraocular lens implantation. Materials and methods: 75  eyes of 75  patients after uncomplicated cataract phacoemulsification were studied. All patients underwent ultrasound biomicroscopy, electronic tonography and biomechanics study on ocular response analyzer (before the surgery, in 2  weeks, 1 and 3  months after the surgery). Results: We found significant increase in anterior chamber depth, distance trabecula-iris at 500  microns from the scleral spur, anterior chamber angle, angle between sclera and iris and angle between sclera and ciliary processes.Preoperatively, intraocular pressure was 15.67  ± 0.85  mm Hg, in 2  weeks  – 13.22 ± 0.53  mm Hg, after 1  month  – 13.21 ± 0.55  mm Hg, after 3  months  – 12.42  ± 0.46  mm Hg. Cornealcompensated pressure before surgery was 15.91 ± 0.69 mm Hg, it increased from the first day after surgery, reached maximum  19.37 ± 1.52  mm Hg after 2  weeks and returned to preoperative values at 1  month; in 3  months, corneal-compensated pressure decreased to 14.4  ± 0.70 mm Hg. Goldmann intraocular pressure changes were similar with corneal-compensated intraocular pressure. Mean preoperative aqueous outflow easiness coefficient was 0.15 mmі/min/mm Hg, increased after 2  weeks to 0.24  mmі/min/mm Hg and stayed unchanged in 1 and 3 months after surgery (0.22 mmі/min/mm Hg).Conclusion: Changes of anatomy and topography of anterior part of the eyeball after cataract phacoemulsification lead to decrease of intraocular pressure by 1.5–2  mm Hg in 3  months after the surgery compared to preoperative values. Further studies of the relation between eyeball anatomy and intraocular pressure are needed

Influence of Flavons on Ca2 + - Accumulating Capacity of Rat Liver Mitochondria

After the introduction of catacin into the body, there was a decrease in Ca2 + - the accumulating capacity of liver mitochondria. The introduction of the poison of a spectacled snake (cobra) into the body led to an acceleration of the penetration of the Ca2 + ion into the mitochondria. With the introduction of catacin into the body of an animal poisoned with the venom of a spectacled snake (cobra), a decrease in Ca2 + - the accumulating capacity of mitochondria was observed

Structure and electrophysical properties of polyvinylidene fluoride (PVDF)/magnetite nanocomposites

In the present study, the effect of magnetite (Fe3O4) nanoparticles on the structural and dielectric properties of poly(vinylidene fluoride) (PVDF) matrix was investigated. Distribution of Fe3O4 nanoparticles in the polymer matrix has been studied by scanning electron microscopy (JEOL JSM-7600 F). The structure of the nanocomposite samples was investigated by the X-ray diffraction and Fourier-transform infrared spectroscopy. It was shown that the dielectric permittivity of PVDF + Fe3O4 nanocomposite samples was gradually increased up to 7 wt% of Fe3O4 content. Further increase in the concentration of the filler leads to decrease in the dielectric permittivity. The subsequent decrease in dielectric permittivity at higher Fe3O4 content can be explained by the increase in defects in the structure of the nanocomposite. The comparison of experimental data and the results of theoretical calculations show that the reduction in the empirical value of dielectric permittivity of the nanocomposite is obviously linked with the threshold value of filler. While calculating the theoretical value of the dielectric permittivity for the higher content of the filler, defects in the nanocomposite structure should be considered