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Polyelectrolyte Complexes between Hyperbranched and Linear Polysaccharides: Fucoidan/Chitosan

Chinese Journal of Polymer Science 2024年第4期42卷 468-479页

作者： ekaterina R.Gasilova Daria N.Poshina Aleksandra O.Sitnikova Natalia N.Saprykina Yury A.Skorik Institute of Macromolecular Compounds of the Russian Academy of Sciences Bolshoi VO 31St.Petersburg199004Russian Federation

Polyelectrolyte complexes(PECs)of hyperbranched(HB)and linear polysaccharides are promising as more effective encapsulation agents compared to PECs formed by linear *** investigated the PECs between the HB anionic polysaccharide fucoidan(FUC)and the cationic linear polysaccharide chitosan(CS).The FUC had a molecular weight(MW)of 30×*** PECs were prepared in three solvents(water,0.01 and 0.1 mol/L acetic acid)with CS of MW of 15,110 and 170 kDa,and deacetylation degrees(DDA)of 70%and 97%.The structures of the PECs and the initial FUC were investigated by multi-angle static and dynamic light *** the FUC contained 18 wt%of—OSO3 groups and 5 wt%of uronic acid units,it was a“strong-weak”copolyanion,so the HB macromolecules of the FUC formed nanogel particles in 0.1 mol/L AcOH and open branched structures in water,as confirmed by the Kratky *** mixing the solutions of original components,the PEC structures underwent an equilibration period,the duration of which increased with the MW of *** the charge stoichiometry was approached,the PECs shrank;the fractal dimension approached unity,indicating the side-by-side packing of adjacent FUC branches with the help of *** aggregation in the vicinity of the charge compensation was hardly observed,as it occurred in a very narrow *** PEC content at theζ-potential inversion depended on solvents’pH and the DDA of *** the extreme case of core-shell PECs in 0.1 mol/L AcOH,obtained by mixing FUC nanogels with the solutions of high MW CS of 97%DDA,the protruding tails of CS formed a positively charged shell in the whole range of FUC content(10 wt%

关键词： Polyelectrolyte complexes Chitosan Hyperbranched fucoidan Light scattering

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Facile Synthesis of Amino Acid Decorated Water-Soluble Fullerene Derivatives with Anti-influenza Activity

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Chinese Journal of Chemistry 2023年第15期41卷 1803-1808页

作者： Valeriya S.Bolshakova ekaterina O.Sinegubova Yana L.Esaulkova Alexander S.Peregudov ekaterina A.Khakina Nikita A.Slesarenko Alexander F.Shestakov Vladimir V.Zarubaev Pavel A.Troshin Olga A.Kraevaya Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry of RAS Academician Semenov ave.1Chernogolovka142432Russia Higher Chemical College of RAS D.1.Mendeleev University of Chemical Technology of RussiaMiusskaya square 9Moscow125047Russia St.Petersburg Pasteur Institute Mira st.14St.Petersburg197101Russia A.N.Nesmeyanov Institute of Organoelement compounds of RAS Vavylova St.28B-334Moscow119991Russia National Research University Higher School of Economics Vavylova St.7Moscow101000Russia Department of Fundamental Physics&Chemical Engineering M.V.Lomonosov Moscow State UniversityLeninskie Gory 1/51Moscow119991Russia Zhengzhou Research Institute Harbin Institute of TechnologyLongyuan East 7th 26Jinshui DistrictZhengzhouHenan 450003China Harbin Institute of Technology West Dazhi Street 92Nan Gang DistrictHarbinHeilongjiang 150001China

Comprehensive Summary Herein,we present a facile synthesis of amide-type water-soluble fullerene derivatives decorated with five residues of amino *** compared to the previously developed approaches,the proposed method enables usage of a broad range of amino acids,including those unstable under Friedel-Crafts reaction ***,it is fully tolerant to the nature of the sixth addend X in C60R5X precursor compounds and allows one to obtain fullerene derivatives with X=Cl,H,*** synthesized amide-type water-soluble fullerene derivatives demonstrated promising antiviral activities against rimantadine-resistant influenzaА/Puerto Rico/8/34(Н1N1)virus in vitro.

关键词： Fullerenes Amino acids Regioselectivity Water-solublel Influenza Antiviral

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Tailoring mesoporous-silica nanoparticles for robust immobilization of lipase and biocatalysis

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Nano Research 2017年第2期10卷 605-617页

作者： Mohammad Kalantari Meihua Yu Yannan Yang ekaterina Strounina Zhengying Gu Xiaodan Huang Jun Zhang Hao Song Chengzhong Yu Australian Institute for Bioengineering and Nanotechnology The University of Queensland Brisbane QLD 4072 Australia Center for Advanced Imaging The University of Queensland Brisbane QLD 4072 Australia

The rational design of nano-carriers is critical for modem enzyme immobilization for advanced biocatalysis. Herein, we report the synthesis of octadecylalkyl- modified mesoporous-silica nanoparticles （C18-MSNs） with a high C18 content （-19 wt.%） and tunable pore sizes （1.6--13 nm）. It is demonstrated that the increased hydrophobic content and a tailored pore size （slightly larger than the size of lipase） are responsible for the high performance of immobilized lipase. The optimized C18-MSNs exhibit a loading capacity of 711 mg/g and a specific activity 5.23 times higher than that of the free enzyme. Additionally, 93% of the initial activity is retained after reuse five times, which is better than the best performance reported to date. Our findings pave the way for the robust immobilization of lipase for biocatalytic applications.

关键词： silica hydrophobic lipase immobilization hyperactivation pore size

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Potential of the Arkhangelsk seismic network for European Arctic monitoring

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Earthquake Science 2024年第5期37卷 434-444页

作者： Galina Antonovskaya Yana Konechnaya ekaterina Morozova Yana Mikhailova Eugenia Shakhova N.Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences Arkhangelsk 163002Russia Geophysical Survey of the Russian Academy of Sciences ObninskKaluga region 249034Russia

The Arkhangelsk Seismic Network(ASN)of the *** Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences,founded in 2003,includes 10 permanent seismic stations located on the coasts of the White,Barents,and Kara Seas and on the Arctic archipelagos of Novaya Zemlya,Franz Josef Land,and Severnaya *** network is registered with the International Federation of Digital Seismograph Networks and the International Seismological *** used not only ASN data to process earthquakes but also the waveforms of various international seismic *** 13,000 seismic events were registered using ASN data for 2012-2022,and for 5,500 of them,we determined the parameters of the earthquake epicenters from the European *** spatial distribution of epicenters shows that the ASN monitors not only the main seismically active zones but also weak seismicity on the shelf of the Barents and Kara *** representative magnitude of ASN was ML,rep=*** level of microseismic noise has seasonal variations that affect the registration capabilities of each station included in the ASN and the overall sensitivity of the network as a *** summer,the sensitivity of the ASN decreased owing to the increasing microseismic and ambient noises,whereas in winter,the sensitivity of the ASN increased significantly because of the decrease.

关键词： European Arctic Arkhangelsk Seismic Network seismic monitoring seismic network registration capabilities

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Tracking perovskite crystallization via deep learning-based feature detection on 2D X-ray scattering data

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npj Computational Materials 2022年第1期8卷 951-959页

作者： Vladimir Starostin Valentin Munteanu Alessandro Greco ekaterina Kneschaurek Alina Pleli Florian Bertram Alexander Gerlach Alexander Hinderhofer Frank Schreiber Institute of Applied Physics University of Tübingen72076TübingenGermany Deutsches Elektronen-Synchrotron DESY Notkestr.8522607HamburgGermany

Understanding the processes of perovskite crystallization is essential for improving the properties of organic solar *** situ real-time grazing-incidence X-ray diffraction(GIXD)is a key technique for this task,but it produces large amounts of data,frequently exceeding the capabilities of traditional data processing *** propose an automated pipeline for the analysis of GIXD images,based on the Faster Region-based Convolutional Network architecture for object detection,modified to conform to the specifics of the scattering *** model exhibits high accuracy in detecting diffraction features on noisy patterns with various experimental *** demonstrate our method on real-time tracking of organic-inorganic perovskite structure crystallization and test it on two applications:*** automated phase identification and unit-cell determination of two coexisting phases of Ruddlesden–Popper 2D perovskites,and *** fast tracking of MAPbI_(3)perovskite *** design,our approach is equally suitable for other crystalline thin-film materials.

关键词： automated crystallization scattering

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Microscopic and metabolic investigations disclose the factors that lead to skin cracking in chili-type pepper fruit varieties

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Horticulture Research 2023年第4期10卷 211-224页

作者： Ofir Marinov Gal Nomberg Sutanni Sarkar Gulab Chand Arya Eldad Karavani Einat Zelinger ekaterina Manasherova Hagai Cohen Department of Vegetable and Field Crops Institute of Plant SciencesAgricultural Research Organization(ARO)Volcani InstituteRishon LeZion 7505101Israel Department of Plant Pathology and Microbiology The Robert H.Smith Faculty of AgricultureFood and EnvironmentThe Hebrew University of JerusalemRehovot 7610001Israel Center for Scientific Imaging(CSI) The Robert H.Smith Faculty of AgricultureFood and EnvironmentThe Hebrew University of JerusalemRehovot 7610001Israel

The hydrophobic cuticle encasing the fruit skin surface plays critical roles during fruit development and *** failure often results in the fruit surface cracking and forming a wound-periderm tissue made of suberin and *** factors that make the fruit skin susceptible to cracking have yet to be fully ***,we investigated two varieties of chili peppers(Capsicum annuum L.),Numex Garnet,whose fruit has intact skin,and Vezena Slatka,whose fruit has cracked *** observations,gas chromatography-mass spectrometry,biochemical and gene expression assays revealed that Vezena Slatka fruit form a thicker cuticle with greater levels of cutin monomers and hydroxycinnamic acids,and highly express key cutin-related *** skin of these fruit also had a lower epidermal cell density due to cells with very large perimeters,and highly express genes involved in epidermal cell *** demonstrate that skin cracking in the Vezena Slatka fruit is accompanied by a spatial accumulation of lignin-like polyphenolic compounds,without the formation of a typical wound-periderm tissues made of suberized ***,we establish that skin cracking in chili-type pepper significantly affects fruit quality during post-harvest storage in a temperature-dependent *** conclusion,our data highlight cuticle thickness and epidermal cell density as two critical factors determining fruit skin susceptibility to cracking in chili-type pepper fruit.

关键词： varieties pepper cracking

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Design and Management of Building＇s Resources

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Journal of Civil Engineering and Architecture 2014年第6期8卷 716-721页

作者： ekaterina Sentova Faculty of Architecture University of Architecture Civil Engineering and Geodesy Sofia 1046 Bulgaria

The developed modem control systems and buildings management resource systems would be effective if they are based on previously established optimal conditions during the building design. This is one of the key issues for a responsible architecture. The focus of this paper is on sustainable design methods and techniques for saving resources and their management throughout the building lifecycle. The main subject of the present article is the characteristics of these methods and their fundamental role in sustainable resource management during the building operation. The results which are based on conducted case studies of European and international practice in the construction of sustainable buildings are implemented here. Key features of a comprehensive approach for design and construction are outlined via comparative analysis, as well as various systems for the evaluation of sustainability for already constructed buildings. The mostly used criteria and indicators for sustainability are systematized, including those related to resource consumption. By analyzing a specific example, the role of sustainable design methods is justified as an important prerequisite for effective management of building resources in the process building maintenance. According to the conducted studies, during the longest life cycle period of a building, by implementation of control systems and resource management of building, the costs are successfully optimized. Specific directions that prove the effectiveness of such systems are systematized in the paper. Innovative approaches, complex methods and measures for design and management of buildings resources are presented as results of this study.

关键词： Sustainable design sustainable buildings BMS (Building Management System).

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Comparison of Organic Sector Development in Six Balkan Countries

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Economics World 2014年第1期2卷 36-44页

作者： ekaterina Arabska University of Agribusiness and Rural Development Plovdiv Bulgaria

The study elaborates and examines a method for evaluation of organic farming development according to 10 indicators estimated by experts＇ opinion. It could be used for making comparisons in different countries, regions, or even time periods on the basis of the 10 main indicators determined considering organic operators, organic area, organic production, organic farms＇ structure, resources, access to market, institutional support, education and training, science and technology, environmental protection, each one of them including sub-indicators. The proposed organic development index （ODI） could be used as a complex indicator for organic sector development embracing different and very significant aspects rather than only nowadays used organic area, percentage, sales, etc collected data for which are still questionable and difficult. The method was put into practice for six Balkan countries （Bulgaria, Serbia, Montenegro, Bosnia and Herzegovina, Turkey, and Romania）. The calculations of ODI show very low results--not well developed and competitive sector suffering the interference of international open markets. Turkey, Bulgaria, and Romania perform better while Western Balkan countries （Serbia, Montenegro, and Bosnia and Herzegovina） are still at the beginning of organic sector development.

关键词： organic farming organic indicators organic development index (ODI) organic data sustainabledevelopment sustainable agriculture

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Cartographic Approach in Studying Landscape Northwestern of Part Western Siberia

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American Journal of Plant Sciences 2015年第13期6卷 2177-2184页

作者： ekaterina Kuzmenko Institute of geography Russian Academy of Sciences Siberian Branch Irkutsk Russia

The structure and dynamics of geosystems: plant of forest and bogs in the northwestern part of Western Siberia is considered by using the Kazym-Lyamin interfluve, based on the landscape-assessment map for the middle part of the Khanty-Mansi Autonomous District. The study used the landscape structural-dynamical approach and the methods of studying the spatio-temporal dynamics of taiga geosystems. Theoretical and methodological research on the development of the landscape-assessment map for Asian Russia is high on the cartographic agenda of the V. B. Sochava Institute of geography SB RAS. The methodic research is to be used to Landsat-5 TM in GIS Multi-Spec and Qgis. An analysis is also made of the topographic, geomorphologic and forest 1:200,000 maps, the profiles characterize the lithology, field data of geobotanical and soil descriptions, and experimental permanent station operated. The landscape structure of this area and its hierarchical subordination are represented in the map legend in terms of groups of facies which are combined into regional-typological classification units: groups of geoms, classes, and types of natural environment. Landscape mapping and planning will help to timely prevent and forecast the magnitudes of disturbances to natural environment using and be as the basis for a package of optimal nature-conservation measures and target-oriented technogenic and anthropogenic impacts.

关键词： Geosystems Landscape Map Successional Dynamics Plant

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A rened analytical model for reconstruction problems in diuse reectance spectroscopy

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Journal of Innovative Optical Health Sciences 2024年第5期17卷 33-51页

作者： ekaterina Sergeeva Daria Kurakina Ilya Turchin and Mikhail Kirillin A.V.gaponov-grekhov institute of applied physics of the russian academy of sciences ulyanov st.46 603950nizhny novgorodrussia

A rened analytical model of spatially resolved diffuse reectance with small source-detector separations(SDSs)for the in vivo skin studies is *** to the conventional model developed by Farrell et al.,it accounts for the limited acceptance angle of the *** rened model is validated in the wide range of optical parameters by Monte Carlo simulations of skin diffuse reectance at SDSs of units of *** of uniform dermis and two-layered epidermis-dermis structures are *** accuracy of the rened model compared to the conventional one is demonstrated in the separate,constraint-free reconstruction of absorption and reduced scattering spectra of uniform dermis from the Monte Carlo simulated *** the case of epidermis-dermis geometry,the recovered values of reduced scattering in dermis are overestimated and the recovered values of absorption are underestimated for both analytical ***,in the presence of a thin mismatched topical layer,only the effective attenuation coe±cient of the bottom layer can be accurately recovered using a diffusion theorybased analytical model while separate reconstruction of absorption and reduced scattering fails due to the inapplicability of the method of ***-ndings require implementation of more sophisticated models of light transfer in inhomogeneous media in the recovery algorithms.

关键词： Diffuse reffectance spectroscopy in vivo skin studies optical properties reconstruction diffuse approximation Monte Carlo simulations method of images

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