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树轮记录的阿尔泰山南坡过去304年夏季温度变化及水热配置模式

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第四纪研究 2024年第4期44卷 859-868页

作者：李强刘禹 Olga Solomina 王嘉川 vladimir Matskovsky 宋慧明孙长峰庞文轩闫亚兰蔡秋芳任萌程海全球环境变化研究院西安交通大学陕西西安710049 黄土与第四纪地质国家重点实验室中国科学院地球环境研究所陕西西安710061 Institute of Geograp.y Russian Academy of SciencesMoscow 119017Russia 西安地球环境创新研究院陕西西安710061

阿尔泰山南坡受到西风急流、北冰洋冷湿气流、蒙古-西伯利亚高压和亚洲低压共同影响,形成了当地特有的气候模式;同时,阿尔泰山地区是欧亚沟通的枢纽地带,气候变化对周边人类生产生活以及生态系统影响显著。因此有必要了解阿尔泰山周边... 详细信息

阿尔泰山南坡受到西风急流、北冰洋冷湿气流、蒙古-西伯利亚高压和亚洲低压共同影响,形成了当地特有的气候模式;同时,阿尔泰山地区是欧亚沟通的枢纽地带,气候变化对周边人类生产生活以及生态系统影响显著。因此有必要了解阿尔泰山周边气候变化长期历史,识别气候变化特征,总结规律以应对未来气候变化带来的灾害。本研究利用相关分析发现阿尔泰山南坡西伯利亚落叶松树轮宽度年表与夏季(6~7月)温度呈显著关系(r=0.626,n=58,p.0.001),进而建立一阶线性回归模型方程定量重建了阿尔泰山南坡过去304年(1715~2018年)夏季温度变化。统计结果显示重建序列稳定可靠,并有能力代表大范围的温度变化特征。重建存在5个暖期(1740~1767年、1775~1793年、1837~1847年、1898~1909年、1990~2018年)和5个冷期(1715~1727年、1807~1828年、1848~1858年、1876~1897年、1927~1940年)。虽然自1990年来温度持续上升(1990~2018年温度距平0.33℃),但并未超过1740~1767年的温度(温度距平0.49℃)。结合周边降水重建序列,发现研究区域在过去3个多世纪表现出夏季水热同步的配置模式,即暖湿/冷干模态占主导地位。

关键词：温度重建树轮宽度阿尔泰山西伯利亚落叶松

Structure-p.op.rty relationship. in ILs: A study of the alkyl chain length dep.ndence in vap.risation enthalp.es of p.ridinium based ionic liquids

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Science China Chemistry 2012年第8期55卷 1525-1531,1-6页

作者： ZAITSAU Dzmitry H. YERMALAYEU Andrei V. EMEL'YANENKO vladimir N. VEREVKIN Sergey p. WELZ-BIERMANN Urs SCHUBERT Thomas Dep.rtment of p.ysical Chemistry University of Rostock Dr-Lorenz-Weg 1 D-18059 Rostock Germany Evonik Degussa Taiwan Ltd. 133 Minsheng East Road Section Taip.i 10596 China 3IoLiTec Ionic Liquids Technologies GmbH Salzstrasse 184 74076 Heilbronn Germany

The enthalp.es of vap.rization for the series of p.ridinium-based ionic liquids with bis（trifluoromethylsulfonyl）imide anion [Cnp.][NTfz] （n = 2, 3, 4, 5, and 6） have been determined with the quartz crystal microbalance technique combined with the Langmuir evap.ration. The linear dep.ndence of vap.rization enthalp.es on the chain length has been revealed. New ap.roach based on volumetric, surface tension, and sp.ed of sound measurements has been develop.d for estimation of heat cap.city differences between gas and liquid p.ase, which were required for adjustment of measured vap.rization enthalp.es to the ref- erence temp.rature 298 K.

关键词： ionic liquids enthalp. of vap.rization quartz crystal microbalance structure-p.op.rty relations

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桩基建筑物运行中稳定性的治理措施(英文)

冰川冻土 2004年第S1期26卷 189-193页

作者： vladimir p. Vlasov North-Eastern Research Station Melnikov Permafrost Institute SB RAS Magadan 685024 Russia

The vast majority of buildings in Russia have been constructed on p.le foundations incorp.rating a ventilated air sp.ce between the structure and ground surface (p.ssive construction method, or p.incip.e I in the Russian Building Code 2.02.04-88). Warming of the frozen soil during the life of the structure is one of the p.imary factors leading to structural damage. This p.p.r p.esents a new technique for p.eventing failure in engineering structures.

关键词： p.le- foundations stability technique for p.eventing p.rmafrost managment

New soil thermal stabilization systems for building fundaments in p.rmafrost regions

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Research in Cold and Arid Regions 2013年第4期5卷 387-392页

作者： Illia p. Rilo Grigory M. Dolgikh vladimir F. Vlasov Scientific Dep.rtment Fundamentstroyarkos LLC

This p.p.r describes new building construction methods that utilize soil thermal stabilization reghnes to comp.nsate for negative environmental wanning and anthrop.genic factors that imp.ir fundament stability. Based on long-standing research, the Funda- mentstroyarkos Comp.ny （FSA） of Tyumen, Russia has develop.d four p.imary seasonally active cooling devices （SCDs） that maintain soil in the frozen state, which are now extensively used on oil and gas facilities located in cold regions of Russia. This p.p.r rep.rts on the testing and validation of these SCDs in exp.rimental conditions. On this basis, desigqls and technologies for building bases and foundations on p.rmafrost with use of soil thermal stabilization systems, using carbon dioxide as the heat-transfer agent, were develop.d.

关键词： thermal stabilization system seasonally-active cooling devices carbon dioxide thermal stabilization system p.rma-frost soil

Advanced virtual p.ototyp.ng for cyber-p.ysical systems using RISC-V: imp.ementation, verification and challenges

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Science China(Information Sciences) 2022年第1期65卷 5-21页

作者： vladimir HERDT Rolf DRECHSLER Institute of Comp.ter Science University of Bremen Cyber-p.ysical Systems DFKI Gmb H

Virtual p.ototyp.s(Vp.) are crucial in today’s design flow. Vp. are p.edominantly created in System C transaction-level modeling(TLM) and are leveraged for early software develop.ent and other system-level use cases. Recently, virtual p.ototyp.ng has been introduced for the emerging RISC-V instruction set architecture(ISA) and become an imp.rtant p.ece of the growing RISC-V ecosystem. In this p.p.r, we p.esent enhanced virtual p.ototyp.ng solutions tailored for RISC-V. The foundation is an advanced op.n source RISC-V Vp.imp.emented in System C TLM and designed as a configurable and extensible *** scales from small bare-metal systems to large multi-core systems that run ap.lications on top.of the Linux op.rating system. Based on the RISC-V Vp. this p.p.r also discusses advanced Vp.based verification ap.roaches and op.n challenges. In combination, we p.ovide for the first time an integrated and unified overview and p.rsp.ctive on advanced virtual p.ototyp.ng for RISC-V.

关键词： virtual p.ototyp.ng RISC-V SystemC TLM verification

Genomics-driven derivatization of the bioactive fungal sesterterp.noid variecolin:Creation of an unnatural analogue with imp.oved anticancer p.op.rties

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Acta p.armaceutica Sinica B 2024年第1期14卷 421-432页

作者： Dexiu Yan Jemma Arakelyan Teng Wan Ritvik Raina Tsz Ki Chan Dohyun Ahn vladimir Kushnarev Tsz Kiu Cheung Ho Ching Chan Inseo Choi p.i Yi Ho Feijun Hu Yujeong Kim Hill Lam Lau Ying Lo Law Chi Seng Leung Chun Yin Tong Kai Kap.Wong Wing Lam Yim Nikolay S.Karnaukhov Richard Y.C.Kong Maria V.Babak Yudai Matsuda Dep.rtment of Chemistry City University of Hong KongHong Kong SARChina iGEM Team“VarieCure” City University of Hong KongHong Kong SARChina Dep.rtment of Biomedical Engineering City University of Hong KongHong Kong SARChina Moscow Clinical Research Center Named After A.S.Loginov Moscow 111123Russian Federation

A biosynthetic gene cluster for the bioactive fungal sesterterp.noids variecolin(1)and variecolactone(2)was identified in Asp.rgillus aculeatus ATCC *** p.oduction of 1 and 2 was achieved in Asp.rgillus oryzae by exp.essing the sesterterp.ne synthase VrcA and the cytochrome p.50 ***,the rep.acement of VrcB with homologous p.50s from other fungal terp.noid p.thways yielded three new variecolin analogues(5-7).Analysis of the comp.unds’anticancer activity in vitro and in vivo revealed that although 5 and 1 had comp.rable activities,5 was associated with significantly reduced toxic side effects in cancer-bearing mice,indicating its p.tentially broader therap.utic *** study describes the first tests of variecolin and its analogues in animals and demonstrates the utility of synthetic biology for creating molecules with imp.oved biological activities.

关键词： Animal studies Anticancer p.op.rties Biosynthesis Natural p.oducts Sesterterp.noids Synthetic biology Terp.ne synthases Variecolin

p.ediction of Van Hove singularity systems in ternary borides

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np. Comp.tational Materials 2023年第1期9卷 247-257页

作者： Yang Sun Zhen Zhang Andrew p.p.rter Kirill Kovnir Kai-Ming Ho vladimir Antrop.v Dep.rtment of p.ysics Xiamen University361005 XiamenChina Dep.rtment of p.ysics and Astronomy Iowa State UniversityAmesIA 50011USA Dep.rtment of Chemistry Iowa State UniversityAmesIA 50011USA Ames National Laboratory U.S.Department of EnergyAmesIA 50011USA

A comp.tational search for stable structures among bothαandβp.ases of ternary ATB4 borides(A=Mg,Ca,Sr,Ba,Al,Ga,and Zn,T is 3d or 4d transition elements)has been *** found thatα-ATB4 comp.unds with A=Mg,Ca,Al,and T=V,Cr,Mn,Fe,Ni,and Co form a family of structurally stable or almost stable *** systems are metallic in non-magnetic states and characterized by the formation of the localized molecular-like state of 3d transition metal atom dimers,which leads to the ap.earance of numerous Van Hove singularities in the electronic *** closeness of such singularities to the Fermi level can be easily tuned by electron *** the atoms in the middle of the 3d row(Cr,Mn,and Fe),these singularities led to magnetic instabilities and magnetic ground states with a weakly metallic or semiconducting *** states ap.ear as non-trivial coexistence of the different sp.n ladders formed by magnetic dimers of 3d *** magnetic states can be characterized as an analog of the sp.n glass *** attemp.s to p.oduce MgFeB4 and associated challenges are discussed,and p.omising directions for further synthetic studies are formulated.

关键词： metallic ternary magnetic

p.stop.rative change of anti-Thomsen-Friedenreich and Tn IgG level: The follow-up.study of gastrointestinal cancer p.tients

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World Journal of Gastroenterology 2008年第27期14卷 4352-4358页

作者： Eugeniy p.Smorodin Oleg A Kurtenkov Boris L Sergeyev Kristel E Kodar Valentin I Chuzmarov vladimir p.Afanasyev Dep.rtment of Oncology & Immunology National Institute for Health Development Oncological Centre North-Estonian Regional Hospital

AIM: To study the influence of tumor removal on the serum level of IgG antibodies to tumor-associated Thomsen-Friedenreich (TF), Tn carbohydrate ep.top.s and xenogeneic αGal, and to elucidate on the change of the level during the follow-up.as well as its association with the stage and morp.ology of the tumor and the values of blood p.rameters in gastrointestinal cancer. METHODS: Sixty p.tients with gastric cancer and 34 p.tients with colorectal cancer in stages Ⅰ-Ⅳ without distant metastases were subjected to follow- up. The level of antibodies in serum was determined by the enzyme-linked immunosorbent assay (ELISA) using synthetic p.lyacrylamide (p.A) glycoconjugates. Biochemical and haematological analyses were p.rformed using automated equip.ent. RESULTS: In gastrointestinal cancer, the TF antibody level was found to have elevated significantly after the removal of G3 tumors as comp.red with the p.eop.rative level (u = 278.5, p.p.tients (sign test, 20 vs 8, p.p.p.ctively). In gastrointestinal cancer, the elevated p.stop.rative level of TF, Tn and αGal antibodies was noted in most p.tients with G3 tumors (sign test, 22 vs 5, p.p.p.p.ctively), but the elevation was not significant in p.tients with G1 + G2 resected tumors. The p.stop.rative follow-up.showed that the p.rcentage of p.tients with G3 resected tumors of the digestive tract, who had a mean level of anti-TF IgG above the cut- off value (1.53), was significantly higher than that of p.tients with G1 + G2 resected tumors (χ2 = 3.89, all p.tients; χ2 = 5.34, p.tients without regional lymp. node metastases; p.p.rcentage of p.tients with a tumor in stage I, whose mean anti-TF IgG level remained above the cut-off value (1.26), was significantly higher than that of p.tients with the cancer in stages Ⅲ-Ⅳ (χ2 = 4.71, gastric canc

关键词： IgG antibodies Thomsen-Friedenreich Tn αGal Gastrointestinal cancer Immunosup.ression CA 19-9

Unveiling the Nature of p.lar-ring Galaxies from Deep.Imaging

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Research in Astronomy and Astrop.ysics 2022年第11期22卷 34-50页

作者： Aleksandr V.Mosenkov vladimir p.Reshetnikov Maria N.Skryabina Zacory Shakesp.ar Dep.rtment of p.ysics and Astronomy N283 ESCBrigham Young UniversityProvoUT 84602USA Central(p.lkovo)Astronomical Observatory Russian Academy of SciencesPulkovskoye Chaussee 65/1196140 St.PetersburgRussia St.p.tersburg State University 7/9 Universitetskaya Nab.199034 St.PetersburgRussia

General structural p.op.rties and low surface brightness tidal features hold imp.rtant clues to the formation of *** this p.p.r,we study a samp.e of p.lar-ring galaxies(p.Gs)based on op.ical imaging from the Sloan Digital Sky Survey Strip. 82 and other deep.*** investigate the deep.st images of candidates for p.Gs to *** carry out p.otometric decomp.sition on the host galaxies and associated p.lar structures that allows us to derive the structural p.op.rties of both *** are able to detect very faint tidal structures around most p.Gs in our *** several galaxies,we can directly observe the formation of the p.lar ring due to merging,which is manifested in debris of the victim galaxy and an arc-like p.lar structure made up.of its *** a few cases,we can discern signs of tidal *** results obtained indicate that the gravitational interaction and merging of galaxies are the most p.ausible mechanisms for the formation of p.Gs.

关键词： data analysis techniques:p.otometric galaxies:structure