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Thermo-and pH-sensitive Polymer with Pendant spacer-linked Imidazole Cycles

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Chinese Journal of Polymer science 2024年第4期42卷 437-445页

作者： Natalya V.Zakharova stanislav N.Zelinskiy Mariya s.strelova Elena N.Danilovtseva Vadim V.Annenkov Institute of Macromolecular Compounds of the Russian Academy of sciences Saint Petersburg199004Russia Limnological Institute of siberian Branch of the Russian Academy of sciences Irkutsk664033Russia

By the reaction of poly(acryloyl chloride) with N-(3-aminopropyl)imidazole, poly(N-(3-(1H-imidazol-1-yl)propyl)acrylamide) was synthesized. The new polymer contains an imidazole ring removed from the main chain by a spacer of five bonds. The structure and purity, molecular weight, hydrodynamic and thermosensitive properties of the obtained sample were studied by1H-and13C-NMR, FTIR spectroscopy, acid-base titration, light scattering, turbidimetry and viscometry. The observed ability of the imidazole-containing polymer to form and destroy associates in water-salt solutions at pH 6.6-7.4 and temperatures of 29-48℃ indicates that these are promising candidates for designing complex biomedical systems. The new polymer is able to form complexes with oligo-DNA more actively than poly(1-vinylimidazole), which is of interest for gene delivery applications. The polymer cross-linked with epichlorohydrin gives micro-relief coatings on the plastic surface, and the modified surface is able to attach negatively charged objects. This thermo-and pH-sensitive polymer modification can be applied to create finely controlled surfaces for cell culturing.

关键词： Imidazole-containing polymer Thermolability pH-sensitivity The modified surface DNA immobilization

Foam rolling and stretching do not provide superior acute flexibility and stiffness improvements compared to any other warm-up intervention: A systematic review with meta-analysis

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Journal of sport and Health science 2024年第4期13卷 509-520页

作者： Konstantin Warneke Gerit Plöschberger Lars H.Lohmann Eric Lichtenstein Daniel Jochum stanislav D.siegel Astrid Zech David G.Behm Institute of sport science University of KlagenfurtKlagenfurt am Wörthersee 9020Austria Department of Human Motion science and Exercise Physiology Friedrich Schiller UniversityJena 07749Germany Department sport Exercise and HealthUniversity of BaselBasel 4052Switzerland Department of Health sciences and Technology ETH ZurichZurich 8092Switzerland school of Human Kinetics and Recreation Memorial University of NewfoundlandSt.JohnsNL A1C 5S7Canada

Background:Acute improvement in range of motion(ROM)is a widely reported effect of stretching and foam rolling,which is commonly explained by changes in pain threshold and/or musculotendinous ***,these effects were also reported in response to various other active and passive interventions that induce responses such as enhanced muscle ***,we hypothesized that acute ROM enhancements could be induced by a wide variety of interventions other than stretching or foam rolling that promote an increase in muscle ***:After a systematic search in PubMed,Web of science,and sPORTDiscus databases,38 studies comparing the effects of stretching and foam rolling with several other interventions on ROM and passive properties were *** studies had 1134 participants in total,and the data analysis resulted in 140 effect sizes(Ess).Es calculations were performed using robust variance estimation model with ***:study quality of the included studies was classified as fair(PEDro score=4.58)with low to moderate certainty of *** showed no significant differences in ROM(Es=0.01,p=0.88),stiffness(Es=0.09,p=0.67),or passive peak torque(Es=-0.30,p=0.14)between stretching or foam rolling and the other identified *** plots revealed no publication ***:Based on current literature,our results challenge the established view on stretching and foam rolling as a recommended component of warm-up *** lack of significant difference between interventions suggests there is no need to emphasize stretching or foam rolling to induce acute ROM,passive peak torque increases,or stiffness reductions.

关键词： Range of motion Passive properties Muscletendon unit Muscle tissue

Visual guidelines and tutoring in pediatric urological surgery

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当代泌尿学（英文） 2024年第1期18卷 18-22页

作者： stanislav Kotcherov shahar Rotem Jawdat Jaber Galit Avraham Gennady Lev Michal Darmon Yudith Gabay Boris Chertin Department of Pediatric Urology Shaare Zedek Medical CenterFaculty of MedicineHebrew UniversityJerusalemIsrael Department of Pediatric surgery Shaare Zedek Medical CenterFaculty of MedicineHebrew UniversityJerusalemIsrael The Operation Room Shaare Zedek Medical CenterJerusalemIsrael

Background:The aim of this prospective randomized study was to evaluate the impact of visual guidelines(picture book)and parents tutoring on pediatric urological surgery on parent's stress and anxiety,the number of postoperative contacts,and complications.Materials and methods:Following institutional ethical committee approval,a special picture book reflecting different stages of the con-valescent period following multiple types of pediatric urological surgery was *** were randomly divided into 2 groups in which 33 parents in Group 1 received the picture book in addition to routine instructions prior to the surgery and 31 in Group 2 received only routine postoperative *** parents were asked to answer a questionnaire(Amsterdam Preoperative Anxiety and Infor-mation scale)regarding the level of anxiety before surgery and immediately after surgery in the recovery *** number of postop-erative parent's calls,nonplaned emergency room visits,and complications were recorded.Results:No statistically significant difference in perioperative parental anxiety was found(p=0.88).The visual tutoring group had a sig-nificantly lower rate of emergency room admissions(6.6％vs.18.6％,p=0.0433),however parents from this group made a higher num-ber of postoperative calls(9.9％vs.3.1％,p=0.38).Two(6.6％)from the tutoring group expressed their desire to omit visual counseling in future surgical preparation and 4(13.2％)did not have an *** satisfaction with regards to the preoperative counseling and information and the number of postoperative complications was similar in both groups.Conclusions:Visual tutoring does not add any value to parental anxiety but seems helpful in reducing postoperative emergency room *** parents preferred to exclude visual information from future preoperative counseling.

关键词： Anesthesia Children Hypospadias Pediatric case Questionnaires

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鄂霍茨克海地质发展的主要阶段

世界地质 1993年第1期 84-84页

作者： Pavel M.sychev stanislav s.snegovskoy 刘俊来

本文利用地质地球物理资料分析了鄂霍茨克海及一些相邻陆区(Primorie岛、sakhalin岛、Kuril岛)地质发展的主要阶段。 Primorie与sakhalin区的不同火山机构形成于三叠纪,当时存在一个深海盆地鄂霍茨克海与日本海连接在一起。其后的演化... 详细信息

本文利用地质地球物理资料分析了鄂霍茨克海及一些相邻陆区(Primorie岛、sakhalin岛、Kuril岛)地质发展的主要阶段。 Primorie与sakhalin区的不同火山机构形成于三叠纪,当时存在一个深海盆地鄂霍茨克海与日本海连接在一起。其后的演化主要特征表现在地球物理资料上。一个大致形成于白垩纪并在以后进一步发展的重力正异常系统沿子午线方向延伸了大于1000km,包括了东sakhalin和中Hokkaido。起始于schmidl半岛的一条强烈磁异常带

关键词：地球物理资料地质磁异常

Assessment of the thermal effect of large industrial buildings on permafrost foundation soils in Yakutsk

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Research in Cold and Arid Regions 2023年第6期15卷 262-267页

作者： Rudolf V.Zhang stanislav I.Zabolotnik Pavel s.Zabolotnik Melnikov Permafrost Institute sB RAs Yakutsk 677010Russia

The results of monitoring studies of the ground thermal state beneath the Yakutsk Combined Heat and Power Plant buildings are presented in order to determine their structural stability and the possibility of further troublefree operation of the entire complex of the *** main causes for the formation of water-bearing taliks under and adjacent to the buildings are presented,and the factors influencing the existing geocryological situation are *** continuing stable state of the buildings demonstrates the possibility of using two construction principles on permafrost at one site,including preserving permafrost and accommodating permafrost thawing.

关键词： Yakutsk Combined Heat and Power Plant Permafrost Talik Ground temperature

Effects of Morphological Integrity of secondary Feather on Their Drag Reduction in Pigeons

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Journal of Bionic Engineering 2022年第5期19卷 1422-1438页

作者： Qian Li Huan shen Qingfei Han Aihong Ji Zhendong Dai stanislav N.Gorb Institute of Bio-Inspired structure and surface Engineering College of Mechanical and Electrical EngineeringNanjing University of Aeronautics and Astronautics29 Yudao StreetNanjing 210016China Department of Functional Morphology and Biomechanics Kiel UniversityAm Botanischen Garten 924118 KielGermany

Flight feathers of birds interact with the air flow during *** the observed low drag and high lift values at wind speeds from 9.0 to 19.8 m/s can be achieved due to the feather aerodynamics remains *** the present paper,we tested and compared morphological changes,drag reduction and flow visualization results of intact,damaged,and artificial feathers at different wind speeds in a wind *** the analysis of the drag force and resultant force angle,we proved that the integrity of feathers,whose barbs are usually closely interconnected,played an important role in the drag,which potentially triggers excellent drag reduction *** wind tunnel tests indicated that intact secondary feathers had a surprisingly high maximum drag reduction property at v?=?9 m/s compared with the feathers,where the integrity of barbs was *** hook cascades facilitated elasticity under pressure and suitable permeability in an intact feather,when the hooks were *** was indicated that the suitable permeability of intact feathers would prevent flow separation and reduce drag force at low wind speed;at high wind speed,elasticity under pressure and suitable permeability in an intact feather would facilitate strong squeezing effect,helping feathers withstand larger aerodynamic forces to which they might be subjected during *** was revealed that the intact secondary feather is a compromise between strong lift generation and drag reduction,which has a great significance for the bird’s flight.

关键词： Morphological integrity secondary feather Drag reduction Wind tunnel smoke visualization Bioinspiration

The Role of Vanes in the Damping of Bird Feathers

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Journal of Bionic Engineering 2023年第4期20卷 1646-1655页

作者： Kai Deng Hamed Rajabi Alexander Kovalev Clemens F.schaber Zhendong Dai stanislav N.Gorb Functional Morphology and Biomechanics Institute of ZoologyKiel University24098KielGermany school of Engineering London South Bank UniversityLondonSE10AAUK Institute of Bioinspired structure and surface Engineering Nanjing University of Aeronautics and AstronauticsNanjing210026People’s Republic of China

Bird feathers sustain bending and vibrations during *** unwanted vibrations could potentially cause noise and flight *** could alter the system response,resulting in improving quiet flight,stability,and *** of feathers are known to be indispensable for supporting the aerodynamic function of the *** relationship between the hierarchical structures of vanes and the mechanical properties of the feather has been previously ***,still little is known about their relationship with feathers’damping ***,the role of vanes in feathers’damping properties was *** vibrations of the feathers with vanes and the bare shaft without vanes after step deflections in the plane of the vanes and perpendicular to it were measured using high-speed video *** presence of several main natural vibration modes was observed in the feathers with *** trimming vanes,more vibration modes were observed,the fundamental frequencies increased by 51-70%,and the damping ratio decreased by 38-60%.Therefore,we suggest that vanes largely increase feather damping *** mechanisms based on the morphology of feather vanes are *** aerodynamic damping is connected with the planar vane surface,the structural damping is related to the interlocking between barbules and barbs,and the material damping is caused by the foamy medulla inside barbs.

关键词： Bird Feather Vibrations Damping Bionic

***: a materials informatics web app platform for materials discovery and survey of state-of-the-art

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npj Computational Materials 2022年第1期8卷 605-616页

作者： Jianjun Hu stanislav stefanov Yuqi song sadman sadeed Omee steph-Yves Louis Edirisuriya M.D.siriwardane Yong Zhao Lai Wei Department of Computer science and Engineering University of South Carolina550 Assembly StreetColumbiaSC29201USA Department of Physics University of ColomboPO Box 1490Colombo 00300Sri Lanka

The availability and easy access of large-scale experimental and computational materials data have enabled the emergence of accelerated development of algorithms and models for materials property prediction,structure prediction,and generative design of ***,the lack of user-friendly materials informatics web servers has severely constrained the wide adoption of such tools in the daily practice of materials screening,tinkering,and design space exploration by materials *** we first survey current materials informatics web apps and then propose and develop ***,a web-based materials informatics toolbox for materials discovery,which includes a variety of routinely needed tools for exploratory materials discovery,including material’s composition and structure validity check (*** neutrality,electronegativity balance,dynamic stability,Pauling rules),materials property prediction (*** gap,elastic moduli,hardness,and thermal conductivity),search for hypothetical materials,and utility *** user-friendly tools can be freely accessed at http://*** argue that such materials informatics apps should be widely developed by the community to speed up materials discovery processes.

关键词： Atlas web prediction

Retinal ganglion cell neuroprotection by growth factors and exosomes:lessons from mesenchymal stem cells

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Neural Regeneration Research 2018年第2期13卷 228-229页

作者： Ben Mead stanislav Tomarev section of retinal ganglion cell biology laboratory of retinal cell and molecular biologynational eye institutenational institutes of healthBethesdaMDUSA

Retinal ganglions cells （RGCs） are responsible for propagating electrochemical information from the eye to the brain along their axons which make up the optic nerve. The loss of RGCs is characteristic in several conditions such as glaucoma and trau- matic optic neuropathy and leads to visual loss and blindness. While no therapy exists to directly treat RGCs, the use of bone marrow-derived mesenchymal stem cells （BMsCs） has shown promise in eliciting significant RGC neuroprotection.

关键词： BMsCs Retinal ganglion cell neuroprotection by growth factors and exosomes lessons from mesenchymal stem cells PDGFR