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Man-made plutonium radioisotopes in the salt lakes of the Crimean peninsula

Journal of Oceanology and Limnology 2018年第6期36卷 1917-1929页

作者： tereshchenko nataliya n PROSKURnIn Vladislav Yu PARASKIV Artem A. CHUZHIKOVA-PROSKURnInA Olga D. The A.O.Kovalevsky Institute of Marine Biological Research of the Russian Academy of Sciences Sevastopol 299011Russian Federation

Investigations of ^(239+240)Pu and ^(238)Pu in the surface layer(0–5 cm) of bottom sediment in the Crimean 10 salt lakes from 4 geographical groups were carried out for the first time. The ^(239+240)Pu varied widely between regional geographical groups of lakes as well as within groups too and ranged from 11±4 to 451±43 mBq^(239+240)Pu/kg. The highest levels of ^(239+240)Pu—419±27, 443±24 and 451±43 mBq/kg were observed in the Yevpatoriya(Lake Kyzyl-Yar), the Tarkhankut(Dzharylhach) and the Kerch group(Tobechik), respectively. The lowest values of ^(239+240)Pu were identified in three lakes of the Perekop group and were 20±12, 24±6 and 48±6 mBq/kg. In all lakes ^(238)Pu was an order of magnitude lower than 239+240 Pu and varied from 4.8±2.6 to 30.7±5.5 mBq/kg. The ^(238)Pu activity was decay-corrected to 1986. The characteristic ratio of the ^(238)Pu/239+240 Pu activities in the sediment and percentage of the Chernobyl-derived Pu was calculated. The largest percentages of the Chernobyl-derived Pu were observed in the Evpatoriya group(Lake SasykSivash)—16.2%±8.26%, the Tarkhankut group(Dzharylhach)—8.4%±2.10% and the Kerch group(Aktash)—10.5%±5.56%. The study of the depth distribution of plutonium in the Lake Kyzyl-Yar bottom sediment core(0–25 cm) was fulfilled. It was shown that 239+240 Pu was high enough in all studied layers of bottom sediment, but the highest activity ratio ^(238)Pu/239+240 Pu(0.062±0.020) was found in the deepest layer of 15–20.5 cm and the percentage of Chernobyl-derived Pu was estimated at 6.8%±2.85% in this layer.

关键词： plutonium radioisotopes 238,239+240 Pu bottom sediments global fallout Chernobyl accident Crimean salt lakes

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Porous Shish-Kebab Structure Prepared from Oriented UHMWPE Films by Processing in Supercritical CO_(2)

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Chinese Journal of Polymer Science 2024年第1期42卷 97-104,I0009页

作者： Sergey A.Lermontov Aleksey V.Maksimkin nataliya A.Sipyagina Tarek Dayyoub Alena n.Malkova Evgeniy A.Kolesnikov Elena A.Straumal Inna O.Gozhikova Saidkhodzha G.nematulloev Dmitry V.Telyshev Institute of Physiologically Active Compounds of the Russian Academy of Sciences Chernogolovka 142432Russia Institute for Bionic Technologies and Engineering I.M.Sechenov First Moscow State Medical University(Sechenov University)Moscow 19991Russia national University of Science and Technology"MISIS"Moscow 119049 Russia Institute of Biomedical Systems National Research University of Electronic TechnologyZelenogradMoscow 124498Russia

For the first time, a highly crystalline porous shish-kebab structure with a high degree of crystallinity was obtained by using a combination of two methods for the formation of porous polymeric materials. A treatment procedure using supercritical carbon dioxide(sc CO_(2))was carried out for oriented ultrahigh molecular weight polyethylene(UHMWPE) films, which provided special conditions for the crystallization of dissolved UHMWPE macromolecules on the surface of oriented UHMWPE crystals. The prepared porous materials were investigated by scanning electron microscopy(SEM) and differential scanning calorimetry(DSC). The particularity of the obtained porous shish-kebab is the absence of the amorphous phase between lamellar crystals(kebabs). The obtained pores had an oval shape, and they were oriented in the orientation direction of the UHMWPE macromolecules. The pore size ranged from 0.05 μm to 4 μm. Controlling the conditions for the crystallization of the UHMWPE macromolecules using supercritical CO_(2) gives the possibility to control the size of both lamellar disks and pores formed.

关键词： UHMWPE Supercritical CO_(2) Porous shish-kebab structure

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The effect of two COVID-19 lockdowns on physical activity of school-age children

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Sports Medicine and Health Science 2022年第2期4卷 119-126页

作者： Olena Yelizarova Tetiana Stankevych Alla Parats nadiya Polka Oksana Lynchak nataliya Diuba Svitlana Hozak State Institution“O.M.Marzieiev Institute for Public Health” National Academy of Medical Sciences of UkraineKyivUkraine Brovary School n9 Kyiv OblastUkraine

The introduction of strict quarantine restrictions in many countries initiated a direction in science to study the behavioral characteristics of children and adolescents during the social isolation at the population level.We present our observations during the two lockdowns in Ukraine.The objective of this study was to determine:a)the level of light(LPA)and moderate-to-vigorous(MVPA)physical activity among school-age children,and b)the impact of the external and internal factors on their physical activity during the lockdown.Global Physical Activity Questionnaire(GPAQ)as part of our questionnaire Q-RAPH was used.Parents of 1091 children 6–18 years old(54%boys)filled Q-RAPH at two measurement points in 2020 and 2021.After performing AnCOVA and logistic regression,we found a significant decrease in MVPA by 12.7%in 2021 compared to 2020(png both periods.The proportion of children who reach the recommended levels of MVPA also decreased by 13.7%in 2021(pnegatively affecting the achievement of 60 min a day of MVPA were female gender,chronic diseases,overweight/obesity,non-participation in organized sports,and a decrease in the average air temperature.This study evidences the insufficient level of preventive measures and requires an intensification of health education among the Ukrainian population.When developing preventive measures,special attention should be paid to groups vulnerable to MVPA reduction as children who have chronic diseases and/or overweight/obesity as well as non-participation in sports.

关键词： Children Adolescents School-age Physical activity Lockdown COVID-19

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Additive manufacturing of high entropy alloys:A practical review

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Journal of Materials Science & Technology 2021年第18期77卷 131-162页

作者： Ahmad Ostovari Moghaddam nataliya A.Shaburova Marina n.Samodurova Amin Abdollahzadeh Evgeny A.Trofimov Department of Materials Science.Physical and Chemical Properties of Materials.South Ural State University 76 Lenin AveChelyabinsk454080Russian Federation Department of Metal Forming South Ural State University76 Lenin AveChelyabinsk.454080Russian Federation Department of Materials Science and Engineering Faculty of EngineeringShahid Chamran University ofAhvazAhvazIran

The novel idea of alloying,which is based on the utilization of multiple principal elements in high concentrations,has created a novel class of promising materials called high entropy alloys(HEAs).So far,several HEAs with outstanding properties beyond those of conventional alloys have been discovered,and new superior high-entropy alloys are still expected to be developed in the future.However,the fabrication process of HEAs through conventional manufacturing techniques suffers from significant limitations due to the intrinsic requirements of HEAs.Additive manufacturing(AM),on the other hand,has provided new opportunities for fabricating geometrically complex HEAs with the possibility of in situ tailoring of their microstructure features.Considering the growing interest in AM of HEAs during most recent years,this review article aims at providing the state of the art in AM of HEAs.It describes the feedstock requirements for laser based AM techniques.Thereafter,a comprehensive picture of the current state of nearly all HEAs processed by laser metal deposition(LMD),selective laser melting(SLM)and selective electron beam melting(SEBM)is presented.Special attention is paid to the features of AM derived microstructures along with their outstanding properties and underlying mechanisms for various material processing combinations.The AM of interstitial solute hardening HEAs,HEA matrix composites as well as non-beam based AM of HEAs will also be addressed.The post-AM treatments and the strategies to fabricate defect-free HEAs are summarized.Finally,a conclusion of current state and future prospects of additive manufacturing of HEAs will be presented.

关键词： High entropy alloys Additive manufacturing Microstructure Mechanical properties

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Enhanced photodegradation activity of ZnO:Eu3+and ZnO:Eu3+@Au 3D hierarchical structures

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Journal of Rare Earths 2020年第1期38卷 21-28页

作者： nataliya Babayevska Igor Iatsunskyi Patryk Florczak Marcin Jarek Barbara Peplińska Stefan Jurga nanoBioMedical Centre Adam Mickiewicz University

In this work the flower-like hierarchical structures(HS) based on 3 D pristine ZnO,ZnO:Eu^3+ and ZnO:Eu^3+ @Au were successfully obtained by a template-free solvothermal and deposition-precipitation method.The decolorization/photodegradation of these structures towards model organic dye(rhodamine 6 G) was studied.The synthesized ZnO-based HS were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),UV-vis and photoluminescence(PL) spectroscopies.The proposed synthesis approaches allow to obtain highly crystalline 3 D ZnO,ZnO:Eu^3+ and ZnO:Eu^3+ @Au composites.Results of scanning microscopy show that ZnO flower-like HS are assemblies from smaller components,forming larger ones,the whole ZnO structure was approximately 3 μm.Au nanoparticles(size^10 nm)are successfully deposited on ZnO HS surface.Luminescent studies show that ZnO is an ideal matrix for incorporation of Eu^3+ ions in broad concentration range(Eu^3+=1.0 at%-5.0 at%) with an efficient red luminescence.The strong UV emission in ZnO,as well as ZnO;Eu^3+HS is observed under 325 nm excitation.Doping of ZnO HS matrix by Eu^3+ions leads to the red shift of deep level emission peak(DLE).The PL intensity reaches the maximum up to 5 at% Eu^3+.The photocatalytic properties of ZnO and ZnO:Eu^3+ @Au HS were investigated under UV-Vis light irradiation towards rhodamine 6 G.The obtained results demonstrate the synergetic effect of the deposited gold nanoparticles and Eu3^+ doping on photocatalytic activity of ZnO:Eu^3+@Au HS in comparison to pristine ZnO and ZnO:Eu^3+ HS.

关键词： Zinc oxide Hierarchical structures Europium Gold Photocatalysis Rhodamine 6G

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Pulsed laser reshaping and fragmentation of upconversion nanoparticles-from hexagonal prisms to ID nanorods through“Medusa”-like structures

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nano Research 2021年第4期14卷 1141-1148页

作者： Laszlo Sajti Denis n.Karimov Vasilina V.Rocheva nataliya A.Arkharova Kirill V.Khaydukov Oleg I.Lebedev Alexey E.Voloshin Alla n.Generalova Boris n.Chichkov Evgeny V.Khaydukov AIT Austrian Institute of Technology GmbH Wiener Neustadt2700Austria Federal Scientific Research Centre“Crystallography and Photonics”Russian Academy of Sciences Moscow119333Russia Laboratoire CRISMAT UMR6508CNRS-ENSIACENUniversite CaenCaen14050France Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences Moscow 117997Russia Institutfiir Quantenoptik Leibniz Universitat HannoverHannover30167Germany Center of Biomedical Engineering Institute of Molecular Medicine Sechenov First Moscow State Medical UniversityMoscow119991Russia

One dimensional(1D)nanostructures attract considerable attention,enabling a broad application owing to their unique properties.However,the precise mechanism of 1D morphology attainment remains a matter of debate.In this study,ultrafast picosecond(ps)laser-induced treatment on upconversion nanoparticles(UCnPs)is offered as a tool for 1 D-nanostructures formation.Fragmentation,reshaping through recrystallization process and bioadaptation of initially hydrophobic(β-na_(1.5)Y_(1.5_)F_(6):Yb^(3+),Tm^(3+)/β-na_(1.5)Y_(1.5_)F_(6))core/shell nanoparticles by means of one-step laser treatment in water are demonstrated.“True”1D nanostructures through"Medusa^-like structures can be obtained,maintaining anti-Stokes luminescence functionalities.A matter of the one-dimensional UCnPs based on direction of energy migration processes is debated.The proposed laser treatment approach is suitable for fast UCnP surface modification and nano-to-nano transformation,that open unique opportunities to expand UCnP applications in industry and biomedicine.

关键词： upconversion nanoparticles fluoride crystals upconversion nanorods one-dimensional(1D)structures laser-induced reshaping

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Global methylation status of sperm DnA in carriers of chromosome structural aberrations

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Asian Journal of Andrology 2017年第1期19卷 117-124页

作者： Marta Olszewska Miroslawa Z Barciszewska Monika Fraczek nataliya Huleyuk Vyacheslav B chernykh Danuta Zastavna Jan Barciszewski Maciej Kurpisz Department of Reproductive Biology and Stem Cells Institute of Human Genetics Polish Academy of Sciences Strzeszynska 32 60-479 Poznan Poland Department of RnA Biology Institute of Bioorganic Chemistry Polish Academy of Sciences Noskowskiego 12/14 61-704 Poznan Poland Institute of Hereditary Pathology Ukrainian Academy of Medical Sciences Lysenko Street 31a 79000 Lviv Ukraine Research Centre for Medical Genetics Russian Academy of Medical Sciences Moskvorechie Street 1115478 Moscow Russian Federation.

Male infertility might be clearly associated with aberrant DnA methylation patterns in human spermatozoa. An association between oxidative stress and the global methylation status of the sperm genome has also been suggested. The aim of the present study was to determine whether the global sperm DnA methylation status was affected in the spermatozoa of carriers of chromosome structural aberrations. The relationships between the 5-methylcytosine （msC） levels in spermatozoa and chromatin integrity status were evaluated. The study patients comprised male carriers of chromosome structural aberrations with reproductive failure （n = 24）, and the controls comprised normozoospermic sperm volunteers （n = 23）. The global msC level was measured using thin-layer chromatography （TLC） and immunofluorescence （IF） techniques. The sperm chromatin integrity was assessed using aniline blue （AB） staining and TUnEL assay. The mean msC levels were similar between the investigated chromosome structural aberrations carriers （P） and controls （K）. However, sperm chromatin integrity tests revealed significantly higher values in chromosomal rearrangement carriers than in controls （P 〈 0.05）. Although the potential relationship between sperm chromatin integrity status and sperm DnA fragmentation and the msC level juxtaposed in both analyzed groups （P vs K） was represented in a clearly opposite manner, the low chromatin integrity might be associated with the high hypomethylation status of the sperm DnA observed in carriers of chromosome structural aberrations.

关键词： 5-methylcytosine chromatin integrity chromosomal rearrangement chromosome translocation global DnA methylation male infertility

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neonatal Exposure to the Dipeptidyl Peptidase-IV Inhibitors Diprotin A and Sitagliptin Induces Depression-Like Behavior, Anxiety, and Latent Aggression in Adolescent and Adult Rats

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Journal of Behavioral and Brain Science 2016年第4期6卷 167-183页

作者： nataliya A. Krupina nadezhda n. Khlebnikova Laboratory of the General Pathology of nervous System Federal State Budgetary Scientific Institution “Institute of General Pathology and Pathophysiology” Moscow Russia

Emotional and motivational disorders in adults are often considered to be the result of altered neurodevelopment. Clinical and experimental data provide evidence that serine protease dipeptidyl peptidase-IV (DPP-IV, EC 3.***.14.5) is involved in the pathophysiology of psycho-emotional disorders. Recently, we have shown that adolescent and adult rats exhibit an increase in anxiety and depression-related behaviors after neonatal administration of a synthetic non-competitive inhibitor of DPP-IV, methionyl-2(S)-cyano-pyrrolidine. In the present study, we tested the effects of two competitive, selective DPP-IV inhibitors, sitagliptin (4 mg/kg) and diprotin A (2 mg/kg), administered at postnatal days 5 - 18 on the emotional and motivational behavior of adolescent and adult rats. We observed increased anxiety in one-month-old diprotin A- or sitagliptin-treated rats in the elevated plus maze;diprotin A also enhanced the animals’ anxiety score using a ranked scale for evaluating anxiety and phobias. In the sucrose consumption and preference test, depressive-like behavior was pronounced in both the diprotin A- and sitagliptin-treated one-month-old animals, while only the diprotin A-treated rats exhibited a decrease in sucrose consumption at the age of 2 months. The diprotin A-treated rats also demonstrated behavioral despair and decreased activity in the forced swimming test within 1 - 3 months of age. Increased aggression was observed in 1 - 3-month-old diprotin A-treated rats and in two-month-old sitagliptin-treated rats. These findings support the hypothesis that DPP-IV is involved in the genesis of emotional and motivational disorders. Additionally, the results show that diprotin А impairs the adolescent and adult rats’ behavior more significantly than sitagliptin when the animals were treated with the DPP-IV inhibitors in the early postnatal period.

关键词： Dipeptidyl Peptidase IV Inhibitors Rat Depression Anxiety Aggression

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Synthesis of 3,5-Dichloro-4-（1,1,2,2-tetrafluoroethoxy）phenyl Containing 1,2,3-Thiadiazole Derivatives via Ugi Reaction and Their Biological Activities

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Chinese Journal of Chemistry 2011年第2期29卷 288-296页

作者： Wang Shouxin Wang Huan Fan Zhijin Fu Yifeng Mi na Zhang Jufang Zhang Zhengcai Belskaya nataliya P. Bakulev Vasiliy A. School of Pharmaceutical Science and Technology Tianjin University Tianjin 300072 China State Key Laboratory of Elemento Organic Chemistry Nankai University Tianjin 300071 China The Ural Federal University namedAfier the First President of Russia B. n. Yeltsin Yeltsin UrFU 620002 Ekaterinburg Russia

A series of novel 3,5-dichloro-4-（1,1,2,2-tetrafluoroethoxy）phenyl containing 4-methyl-l,2,3-thiadiazole derivatives were designed and synthesized via Ugi reaction. Their structures were confirmed by IR, 1H nMR, 13C nMR and high-resolution mass spectroscopy. The preliminary bioassay results indicated that some title compounds had good fungicide activity at 50 ug/mL; most of the compounds presented a certain degree of direct inhibition activity, good inactivation and curative activity against tobacco mosaic virus at 500 ug/mL and 100 ug/mL; some compounds showed good larvicidal activity against Plutella xylostella L. at 200 ug/mL and excellent larvicidal activities against Culex pipiens pallens at 2 ug/mL.

关键词： 1,2,3-thiadiazole Ugi reaction synthesis design biological activity multicomponent reactions

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Design, Synthesis and Biological Evaluation of Isothiazole Based 1,2,4-Trizaole Derivatives

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Chinese Journal of Chemistry 2018年第8期36卷 731-736页

作者： Lai Chen Qifan Wu Zhijin Fan Hongpeng Li Jiwei Li Wenhao Hu Xiumei Liu nataliya P Belskaya Tatiana Glukhareva Bin Zhao State Key Laboratory of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Nankai University Tianjin 300071 China The Ural Federal University named after the First President of Russia B. n. Yeltsin Yeltsin UrFU 620002 Ekaterinburg Russia

A series of novel 3,4-dichloroisothiazole based 1,2,4-triazole derivatives were rationally designed and synthesized. Their structures were confirmed by IH nMR, 13C nMR, HRMS or elemental analysis; the typical crystal structure was determined by X-ray diffraction for validation. All target compounds were evaluated for their in vitro fungicidal and in vivo anti-TMV activities. The bioassay results indicated that compound 6b, namely 1-（3,4-dichloroisothiazol-5-yo）-o-（4-ouorophenyo）-2-（OH-o,2o4-triazol-o-yl）ethanol, exhibited excellent growth inhibition against B. cinerea, C. arachldico;a and P. piricola with median effective concentrations （EC50） of 6.98, 2.73 and 3.07μg/mL, respectively, and good in vivo anti-TMV activity of over 60% of inactivation and induction activity at 100 μg/mL. These data demonstrate that compound 6b is both a fungicide and an anti-TMV lead, deserving further studies.

关键词： 3,4-dirchloroisothiazole 1,2,4-triazole antifungal activity anti-TMV

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