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Substituted diamides of dipicolinic acid as extractants and ionophores for rare earth metals

Journal of Rare Earths 2023年第8期41卷 1234-1241,I0005页

作者： Yingchao Ren Valery A.Polukeev Ekaterina V.Kenf Liudmila I.Tkachenko Mikhail Yu Alyapyshev vasily a.babain Andrey V.Nechaev Andrey V.Legin Dmitry O.Kirsanov Institute of Chemistry Saint-Petersburg UniversityPeterhofUniversitetsky Prospect 26198504Saint-PetersburgRussia JSVC Vekton Ul.2-oy Luch 9192019Saint-PetersburgRussia Khlopin Radium Institute 194021282nd Murinsky avRussia ThreeArc Mining LLC Pr.Narodnogo Opolchenia 10198216Saint-PetersburgRussia Rusredmet Vosstanovleniya str.15bl.3198320St.PeterburgKrasnoe seloRussia

The variety of newly synthesized diamides of dipicolinic acid(DPA)bearing methyl-and oxymethyl substituents in various positions of phenyl ring was investigated as potential ligands for liquid-liquid extraction of rare earth metal ions and as membrane active compounds in plasticized polymeric membranes of potentiometric sensors.It is found that scandium is extracted with 2,6-pyridinedicarboxylic acid diamides similarly to heavy lanthanides,while yttrium is extracted together with light group lanthanides.DPA shows high selectivity for the separation of cadmium/zinc,lead/nickel or copper/nickel pairs.The four out of six studied ligands demonstrate significant potentiometric sensitivity towards scandium,yttrium and lanthanides in 10^(-7)-10^(-3)mol/L concentration range in nitric acid solutions.The trends in sensitivity values vary depending on a ligand structure and the highest values are observed for Sc^(3+)and heavy lanthanides.According to the evaluated selectivity Sm^(3+)is the most preferred ion,while La^(3+)is the most discriminated.The differences in sensor behavior in rare earth metal solutions assume that such devices can be applied in sensor arrays for potentiometric analysis of lanthanide mixtures.

关键词： Dipicolini cacid diamides Scandium Yttrium Lanthanides Extraction Potentiometric sensors

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Model of fractured medium and nondestructive control of composite materials

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Chinese Journal of Aeronautics 2024年第2期37卷 93-99页

作者： vasily GOLUBEV Ilia NIKITIN Katerina BEKLEMYSHEVA Department of Computers Science and Numerical Mathematics Moscow Institute of Physics and TechnologyDolgoprudny 141700Russia Mathematical Modeling and Management Department of InformatizationInstitute of Computer Aided Design RASMoscow 123056Russia

Non-destructive testing of composites is an important issue in the modern aircraft industry.Composites are susceptible to the barely visible impact damage which can affect the residual strength of the material and occurs both during production and operation.The continuum model for describing the damaged zone is presented.The slip theory relations used for a continuous distribution of slip planes are applied.At the initial stage,the isotropic background model is used.This model allows the material slippage along the fractures based on the Coulomb friction law with the small viscous addition.In this regime,the govern system of equations becomes rigid.To overcome this difficulty,the explicit-implicit grid-characteristic scheme is proposed.The standard ultrasound diagnostic procedure of damaged composite materials is successfully simulated.Compared with the trivial free-surface fracture model,different reactions on the compression and stretch waves are registered.This approach provided an effective way for the simulation of complex dynamic behavior of damage zones.

关键词： Non-destructive testing Composite materials Numerical modeling Continuum model Grid-characteristic method

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Are population cycles recovering?

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Integrative Zoology 2024年第3期19卷 538-547页

作者： vasily D.YAKUSHOV Boris I.SHEFTEL A.N.Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences MoscowRussia

The dynamics of populations of small mammals of Central Siberia was analyzed.The studies were carried out at the Yenisei ecological station“Mirnoye”of the A.N.Severtsov Institute of Ecology and Evolution,Russian Academy of Sciences.The time series analysis was performed by the wavelet transform using the statistical data processing language R.In the 20th century,the dynamics of the population of the community and some of its constituent species(Sorex araneus;S.caecutiens;S.isodon;S.tundrensis;S.minutus;Craseomys rufocanus;Clethrionomys rutilus;Microtus oeconomus;M.agrestis)were characterized by a 4-year periodicity.The type of dynamics changed to noncyclic by the nineties,but by 2022,four species(S.araneus,S.isodon,C.rutilus,and M.oeconomus)and the community as a whole showed a tendency toward recovery of population cycles.The remaining species were characterized by consistently low numbers with irregular low amplitude fluctuations.

关键词： population cycles small mammals time-series analysis wavelet transform

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Dynamical control of nanoscale light-matter interactions in low-dimensional quantum materials

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Light(Science & Applications) 2024年第2期13卷 236-253页

作者： Yeonjeong Koo Taeyoung Moon Mingu Kang Huitae Joo Changjoo Lee Hyeongwoo Lee vasily Kravtsov Kyoung-Duck Park Department of Physics Pohang University of Science and Technology(POSTECH)Pohang37673Republic of Korea School of Physics and Engineering ITMO UniversitySaint Petersburg197101Russia

Tip-enhanced nano-spectroscopy and-imaging have significantly advanced our understanding of low-dimensional quantum materials and their interactions with light,providing a rich insight into the underlying physics at their natural length scale.Recently,various functionalities of the plasmonic tip expand the capabilities of the nanoscopy,enabling dynamic manipulation of light-matter interactions at the nanoscale.In this review,we focus on a new paradigm of the nanoscopy,shifting from the conventional role of imaging and spectroscopy to the dynamical control approach of the tip-induced light-matter interactions.We present three different approaches of tip-induced control of light-matter interactions,such as cavity-gap control,pressure control,and near-field polarization control.Specifically,we discuss the nanoscale modifications of radiative emissions for various emitters from weak to strong coupling regime,achieved by the precise engineering of the cavity-gap.Furthermore,we introduce recent works on light-matter interactions controlled by tip-pressure and near-field polarization,especially tunability of the bandgap,crystal structure,photoluminescence quantum yield,exciton density,and energy transfer in a wide range of quantum materials.We envision that this comprehensive review not only contributes to a deeper understanding of the physics of nanoscale light-matter interactions but also offers a valuable resource to nanophotonics,plasmonics,and materials science for future technological advancements.

关键词： quantum precise shifting

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Atherosclerosis originating from childhood:Specific features

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Journal of Biomedical Research 2024年第3期38卷 233-240页

作者： Anastasia V.Poznyak Alexey A.Yakovlev MikhailА.Popov Elena B.Zhigmitova vasily N.Sukhorukov Alexander N.Orekhov Institute for Atherosclerosis Research Moscow 121609Russia Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology Moscow 109240Russia Department of Cardiac Surgery Moscow Regional Research and Clinical InstituteMoscow 129110Russia Laboratory of Angiopathology Institute of General Pathology and PathophysiologyMoscow 125315Russia

Atherosclerosis is extremely widespread.Traditionally,it is considered a disease of older people,who most often experience problems with the heart and blood vessels.While much attention from the scientific community has been paid to studying the association between aging and atherosclerosis,as well as its consequences,there is evidence that atherosclerosis occurs at an early age.Atherosclerosis may form both during intrauterine development and in childhood.Nutrition plays an important role in childhood atherosclerosis,along with previous infectious diseases and excess weight of both the child and the mother.In the present review,we examined the development of atherosclerosis and the prerequisites in childhood.

关键词： atherosclerosis childhood pediatrics cardiovascular disease

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Balloon dilation of congenital perforated duodenal web in newborns: Evaluation of short and long-term results

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World Journal of Gastrointestinal Endoscopy 2024年第6期16卷 343-349页

作者： Kirill Marakhouski Elena Malyshka Katsiaryna Nikalayeva Larysa Valiok Aleh Pataleta Kiryl Sanfirau Aliaksandr Svirsky vasily Averin Division of Diagnostic Republican Scientific and Practical Centre of Paediatric SurgeryMinsk 220113Belarus Department of Newborn Surgery Republican Scientific and Practical Center of Pediatric SurgeryMinsk 220013Belarus Department of Pediatric Surgery Republican Scientific and Practical Center of Pediatric SurgeryMinsk 220013Belarus Division of Diagnostic Republican Scientific and Practical Center of Pediatric SurgeryMinsk 220013Belarus Academic Chair of Pediatric Surgery Belarusian State Medical UniversityMinsk 220116Belarus

BACKGROUND Incomplete congenital duodenal obstruction(ICDO)is caused by a congenitally perforated duodenal web(CPDW).Currently,only six cases of balloon dilatation of the PDW in newborns have been described.AIM To present our experience of balloon dilatation of a perforated duodenal memb-rane in newborns with ICDO.METHODS Five newborns who underwent balloon dilatation of the CPDW along a prein-stalled guidewire between 2021 and 2023 were included.Nineteen newborns diagnosed with ICDO who underwent laparotomy were included in the control group.RESULTS In all cases,good anatomical and clinical results were obtained.In three cases,a follow-up study was conducted after 1 year.The average time to start enteral feeding per os was significantly earlier in the study group(4.4 d)than in the laparotomic group(21.2 days;P<0.0001).The time spent by patients in the intensive care unit and hospital after balloon dilatation was also significantly shorter.We determined the selection criteria for possible and effective CPDW balloon dilatation in newborns as follows:(1)Presence of dynamic radiographic signs of the passage of a radiopaque substance beyond the zone of narrowing or radiographic signs of pneumatisation of the duodenum and small bowel distal to the web;(2)presence of endoscopic signs of CPDW;(3)successful cannulation with a guidewire performed parallel to the endoscope,with holes in the congenital duodenal web;and(4)successful positioning of the balloon performed along a freestanding guidewire on the web.CONCLUSION Strictly following selection criteria for newborns with ICDO caused by CPDW ensures that endoscopic balloon dilatation using a pre-installed guidewire is safe and effective and shows good 1-year follow-up results.

关键词： Newborns Congenital duodenal obstruction Perforated duodenal membrane Endoscopy Balloon dilation

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绿原酸通过减轻心肌细胞铁死亡改善心力衰竭（英文）

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Journal of Traditional Chinese Medical Sciences 2024年第2期 191-198页

作者：黄凯李芳赫唐家杨普海崟 Sukhorukov,vasily Orekhov,Alexander N. 郭淑贞北京中医药大学中医学院俄罗斯医学科学院病理生理学研究所血管病理学实验室

目的：绿原酸（CGA）是一种普遍存在于传统中药和食物中的多酚类化合物，包括金银花、杜仲叶、茶和咖啡。本文的目的是阐明绿原酸对心肌细胞铁死亡和心力衰竭的影响。方法：我们通过运用主动脉缩窄（TAC）诱导的心力衰竭小鼠模型，评估... 详细信息

目的：绿原酸（CGA）是一种普遍存在于传统中药和食物中的多酚类化合物，包括金银花、杜仲叶、茶和咖啡。本文的目的是阐明绿原酸对心肌细胞铁死亡和心力衰竭的影响。方法：我们通过运用主动脉缩窄（TAC）诱导的心力衰竭小鼠模型，评估了绿原酸对心脏功能的影响，具体指标包括左室射血分数（LVEF）、分数缩短（LVFS）、舒张末期容积（LVEDV）、收缩末期容积（LVESV）、收缩末期直径（LVESD）和舒张末期直径（LVEDD）。同时建立了异丙肾上腺素（ISO）诱导的H9c2心肌细胞模型，并用不同浓度的绿原酸进行干预。为了评估绿原酸对心肌细胞铁死亡的影响，我们检测了细胞活性，并使用荧光染色评估了细胞内活性氧（ROS）、亚铁离子（Fe2+）和脂质过氧化物的水平。为了明确绿原酸调控铁死亡的信号通路，我们使用western blot检测了H9c2心肌细胞和小鼠心肌组织中铁死亡生物标志物的表达，如溶质载体家族7成员11(SLC7A11)和谷胱甘肽过氧化物酶4(GPX4)。结果：绿原酸显著增强了小鼠心脏功能指标，如LVEF、LVFS、LVEDV、LVESV、LVESD和LVEDD。异丙肾上腺素诱导的H9c2心肌细胞显示出降低的细胞活性及升高的ROS水平、Fe2+含量和脂质过氧化水平，然而，绿原酸显著改善了这些变化。此外，在H9c2心肌细胞和TAC小鼠心肌组织中，绿原酸增加铁死亡相关的蛋白表达，如SLC7A11和GPX4。结论：绿原酸具有通过SLC7A11/GPX4信号通路增强心脏功能，减少心肌细胞中的脂质过氧化、ROS水平和心肌细胞铁死亡的作用。这些结果为绿原酸的临床应用和心力衰竭的治疗提供了新的见解。

关键词：绿原酸心力衰竭铁死亡 H9c2心肌细胞中医药

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One-Generated Nilpotent Bicommutative Algebras

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Algebra Colloquium 2022年第3期29卷 453-474页

作者： Ivan Kaygorodov Pilar Páez-Guillán vasily Voronin Centro de Matemática e Aplicacōes Universidade da Beira InteriorCovilhãPortugal Institute of Mathematics and Mathematical ModelingAlmatyKazakhstan University of Santiago de Compostela Santiago de CompostelaSpain University of ViennaViennaAustria Novosibirsk State University NovosibirskRussia

We give a classification of 5-and 6-dimensional complex one-generated nilpotent bicommutative algebras.

关键词： bicommutative algebras nilpotent algebras algebraic classification central extension

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Emerging applications of tumour-educated platelets in the detection and prognostication of ovarian cancer

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蛋白质与细胞:英文版 2023年第8期14卷 556-559页

作者： Jiewei Zhu vasily Giannakeas Steven A.Narod Mohammad R.Akbari Women's College Research Institute Women's College HospitalUniversity of TorontoTorontoOntario M5S 1B2Canada Department of Medicine University of TorontoTorontoOntario MSS 1ACanada Institute of Medical Science Faculty of MedicineUniversity of TorontoTorontoOntario MSS 1ACanada Dalla Lana School of Public Health University of TorontoTorontoOntario MSS 1ACanada

Platelets are nuclear cell fragments produced by megakaryocytes.Inactive platelets circulate in the blood until activation by extemal stimuli to execute important biological functions,including hemostasis,inflammation,tissue remodelling,and blood vessel formation.Platelets can reflect cancer cells'pathogenesis through a process known as tumour-educated platelets(TEPs).

关键词： Platelet tumour platelets

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危机与全球转型:中俄与变化中的世界秩序

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俄罗斯研究 2024年第1期 37-49页

作者：邢广程黄仁伟维多利亚·潘诺娃瓦西里·卡申中国历史研究院中国社会科学院学部中国社会科学院中国边疆研究所(中国历史研究院中国边疆研究所) 复旦大学中国研究院复旦大学“一带一路”及全球治理研究院俄罗斯高等经济大学俄罗斯高等经济大学欧洲与国际综合研究中心

2024年,中俄将迎来建交75周年。从相互视为友好国家到建立建设性伙伴关系,从建立战略协作伙伴关系到全面战略协作伙伴关系,中俄关系的定位历经数次提升,稳步迈上一个又一个台阶。当前,中俄关系已成为当今国际舞台上具有强劲内生动力和... 详细信息

2024年,中俄将迎来建交75周年。从相互视为友好国家到建立建设性伙伴关系,从建立战略协作伙伴关系到全面战略协作伙伴关系,中俄关系的定位历经数次提升,稳步迈上一个又一个台阶。当前,中俄关系已成为当今国际舞台上具有强劲内生动力和高度成熟的一对大国关系,堪称当代国际关系的典范。在中俄双边关系方面,中俄两国需要继续推进务实合作。在维护地区和世界稳定方面,中俄两国的双边关系存在溢出效应,对世界安全、稳定和发展负有重要责任。面对国际形势的重大变化,中俄两国需要继续就转向东方和面对西方的问题进行深入沟通,营造有利于自身发展的周边国际环境,并避免在两国关系性质的判定方面出现异常。俄乌冲突的发生使世界地缘政治和地缘经济出现了“新格局”。对中俄而言,“新格局”意味着整个世界的供应链、产业链发生了很大变化:世界能源体系的变化、世界货币体系的变化以及北亚板块的出现。中俄两国需协作提高两国经济的可持续发展能力,优化产业结构;协作应对复杂国际局势带来的挑战;协作外交事务,提升两国关系的稳定性和可持续性。推动金砖国家合作机制的创新性发展,聚焦对中俄和所有金砖国家更加具有战略意义的交通、互联互通、产能建设、经贸关系等领域。推动中俄人文交流,提升两国高等教育的国际竞争力。

关键词：中俄关系 “一带一路”倡议金砖国家新型大国关系世界秩序

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