Detection Statistics of Pulse Signals at Declinations from +42o+42^o to +52o+52^o at the Frequency 111 MHz

A search for pulse signals was carried out in a new sky area included in the monitoring program for the search for pulsars and transients. Processing of several months data recorded in six frequency channels with a total bandwidth of 2.5 MHz showed that, on average, 4 pulses per hour are observed in each of the 24 connected stationary beams. Of these pulses, 18.3% are similar to those of pulsars. They are visible in one or two neighboring beams and have a pronounced dispersion shift, that is, they are recorded first at a high and then at a low frequency, which indicates the possible passage of the signal through the interstellar medium. Almost 68% of such detected pulses belong to six known pulsars with dispersion measures from 9 to 141 $pc/cm^3$, and almost all of the remaining pulses are either noise of an unknown nature or artifacts of the proposed pulse separation technique. An additional study of the selected array of 3650 obvious pulsar pulses revealed 13 pulses belonging to four rotating radio transients (RRATs). Their dispersion measures are in the range of 17-51 $pc/cm^3$. A search for regular (periodic) RRAT emission was carried out using power spectra summed over 121 days. Periodic radiation was not detected, but for two RRATs, upper estimates of the periods were obtained from measurements of the time intervals between pulses. The upper estimates of the integrated flux density of the detected RRATs are in the range 2-4 mJy at the frequency 111 MHz.Comment: published in Astronomy Report, translated by Yandex translator with correction of scientific lexis, 6 pages, 3 figures, 2 table

Detection of two new RRATs at 111 MHz

A search for pulse signals in a area with declinations of +52\degr <\delta <+55\degr was carried out on the LPA LPI radio telescope. When processing ten months of observations recorded in six frequency channels with a channel width of 415 kHz and a total bandwidth of 2.5 MHz, 22 thousand events were found with a pronounced dispersion delay of signals over frequency channels, i.e. having signs of pulsar pulses. It turned out that the found pulses belong to four known pulsars and two new rotating radio transients (RRATs). An additional pulse search conducted in 32-channel data with a channel width of 78 kHz revealed 8 pulses for the transient J0249+52 and 7 pulses for the transient J0744+55. Periodic radiation of transients was not detected. The analysis of observations shows that the found RRATs are most likely pulsars with nullings, where the proportion of nulling is greater than 99.9\%.Comment: published in Astronomy Reports, translated by Yandex translator with correction of scientific lexis, 5 pages, 2 figures, 1 tabl

Pushchino multibeams pulsar search. IV. Detection of new pulsars at declinations -9o < \delta < +55o

The search for pulsars in monitoring data obtained at the radio telescope Large Phased Array (LPA) at a frequency of 111 MHz was carried out. Daily round-the-clock observations were carried out for about 3,000 days. The duration of the observation session for each direction in the sky was 3.5 minutes per day. The search for pulsars was carried out using power spectra. To search for weak pulsars, power spectra were summed up. The expected increase in sensitivity was 35-40 times compared to observations in one session. In a blind search, 330 pulsars with regular radiation were detected, with periods (P) from 0.0333 to 3.7455 s and dispersion measures (DM) up to 249 pc/cm3. 39 pulsars turned out to be new. Average profiles were obtained for 6 pulsars. The DM for 7 pulsars previously detected on the LPA have been clarified.Comment: published in MNRAS, 13 pages, 4 figures, 4 tables, 4 appendixe

Core acid treatment influence on well reservoir properties in Kazan oil-gas condensate field

The research involves investigation of the influence of hydrochloric acid (HCI-12%) and mud acid ( mixture: HCl - 10 % and HF - 3 %) treatment on the Upper-Jurassic reservoir properties in Kazan oil-gas condensate field wells. The sample collection included three lots of core cylinders from one and the same depth (all in all 42). Two lots of core cylinders were distributed as following: first lot - reservoir properties were determined, and, then thin sections were cut off from cylinder faces; second lot- core cylinders were exposed to hydrochloric acid treatment, then, after flushing the reservoir properties were determined, and thin sections were prepared. Based on the quantitative petrographic rock analysis, involvin 42 thin sections, the following factors were determined: granulometric mineral composition, cement content, intergranular contacts and pore space structure. According to the comparative analysis of initial samples, the following was determined: content decrease of feldspar, clay and mica fragments, mica, clay and carbonate cement; increase of pore spaces while in the investigated samples- on exposure of rocks to acids effective porosity and permeability value range is ambiguous

Luminescent coordination polymers based on Ca²⁺ and octahedral cluster anions [{M₆Clⁱ₈}Clᵃ₆}²⁻ (M = Mo, W) : synthesis and thermal stability studies

Luminescent coordination polymers (CPs) based of inexpensive stable precursors are attractive materials for applications. Here we report the synthesis and evaluation of the stability and photophysical characteristics of the first examples of phosphorescent CPs based on octahedral molybdenum and tungsten cluster anions. Specifically 1D CP trans-[{Ca(OPPh₃)₄}{{M₆Clⁱ₈}Clᵃ₆}]∞ (M = Mo, W) can be obtained either directly at increased temperature or via intermediate phases [cis-Ca(OPPh₃)₄(H₂O)₂][{M₆Clⁱ₈}Clᵃ₆]∙2CH₃CN that are stable at room-temperature, but convert to the titled CP at temperatures above 100 °C

Detection of Five New RRATs at 111 MHz

Results of 111-MHz monitoring observations carried out on the Big Scanning Antenna of the Pushchino Radio Astronomy Observatory during September 1-28, 2015 are presented. Fifty-four pulsating sources were detected at declinations $-9^o < \delta < +42^o$. Forty-seven of these are known pulsars, five are new sources, and two are previously discovered transients. Estimates of the peak flux densities and dispersion measures are presented or all these sources.Comment: published in Astronomy Report, translated by Yandex translator with correction of scientific lexis, 8 pages, 2 figures, 3 table

GEMINGA: NEW OBSERVATIONS AT LOW RADIO FREQUENCIES

ABSTRACT. After nearly 10 years, we have succeeded to detect radio emission from Geminga more again. In this report we present new evidence for presence of radio emission from Geminga in the range 42-112 MHz. The observations were carried out on two sensitive transit radio telescopes We used three new digital receivers to detect the pulses and to obtain dynamic spectra.The examples of mean pulse profiles are presented. Exact value of the dispersion measure have been calculated using the simultaneous observations at three frequencies

COMPARATIVE CHARACTERISTICS OF THE RHYTHM OF THE SEASONAL DEVELOPMENT OF SCUTELLARIA BAICALENSIS GEORGI IN THE NON-CHERNOZEM ZONE AND ON THE SOUTH COAST OF THE CRIMEA

Scutellaria baicalensis is a valuable medicinal plant and a protected species of the East Asian flora. Therefore, work on its introduction is underway in many regions of Russian Federation. Studying of the influence of meteorological factors on the phenology of the S. baicalensis in regions of Russian Federation with contrasting climatic conditions is important in grounds of climate change. Materials and methods. The object of the study is the population of the S. baicalensis biocollections of All-Russian Scientific Research Institute of Medicinal and Aromatic Plants and Nikitsky Botanical Garden. Meteorological indicators: sum of active temperatures, sum of precipitation. Statistical analysis: Tau-b-Kendall correlation coefficient. Results. The duration of the growing season in each region has little variability, independently of the weather conditions of the year. The interval between the onset of phenological phases in the Crimea was characterized by weaker variability than in the Non-Chernozem zone. A significantly smaller amount of active temperatures was required for the onset of phenological phases In the Non-Chernozem zone compared to the southern coast of Crimea. The difference in the average sum of active temperatures across the regions reached 1694.6°C by the end of the growing season. The amount of precipitation had sharp fluctuations in both regions and in all years of research. Conclusion. Secondary flowering, wide amplitudes of the duration of phenological phases and the growing season as a whole, the sum of active temperatures and precipitation indicate the ecological plasticity of the S. baicalensis and the availability of conditions for its cultivation in both regions

Associations of changes in lipid metabolism parameters and the severity of COVID-19 infection in Novosibirsk residents

Aim. To study the associations of changes in lipid metabolism parameters and the severity of a coronavirus disease 2019 (COVID-19).Material and methods. This cross-sectional study included 270 patients aged 26-84 years (mean age, 53,09±13,22 years) who had COVID-19 within prior two months, which were divided into 3 groups: mild (1, n=128), moderate (2, n=128) and severe (3, n=14) COVID-19. Patients were assessed for body mass index (BMI), waist circumference (WC), hip circumference (HC), waist-to-hip ratio (WHR), total cholesterol, triglycerides (TG), high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C). In addition, atherogenic index of plasma (AIP) was calculated. Statistical processing was performed using the SPSS software package (version 13.0).Results. Patients with severe COVID-19 had significantly higher levels of TG and AIP compared with patients with moderate and mild course. BMI and WC were significantly higher in patients in groups 2 and 3 compared with patients in group 1. In women, BMI and AIP levels were significantly higher in the severe COVID-19 group compared to groups 1 and 2. HDL-C levels were lower in patients with severe COVID-19 compared to those with moderate disease. WHR was higher among men in group 3 compared with group 1.Conclusion. Patients with severe COVID-19 have higher BMI, WC, AIP, TG levels, and lower HD-C levels. The relative odds for severe COVID-19 are associated with increased WC, AIP, TG, and lower HDL-C

On Local Behavior of Holomorphic Functions Along Complex Submanifolds of C^N

In this paper we establish some general results on local behavior of holomorphic functions along complex submanifolds of \Co^{N}. As a corollary, we present multi-dimensional generalizations of an important result of Coman and Poletsky on Bernstein type inequalities on transcendental curves in \Co^{2}.Comment: minor changes in the formulation and the proof of Lemma 8.