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Fractionation and fixation of rare earth elements in soils:Effect of spiking with lanthanum,cerium,and neodymium chlorides

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Journal of Rare Earths 2022年第1期40卷 143-152页

作者： olga b.Rogova Petr S.Fedotov Rustam Kh.Dzhenloda Vasily K.Karandashev V.V.Dokuchaev Soil Science Institute Russian Academy of Sciences7 Building 2 Pyzhevskiy Side StreetMoscow119017Russia V.I.Vernadsky Institute of Geochemistry and Analytical Chemistry Russian Academy of Sciences19 Kosygin StreetMoscow119991 Russia National University of Science and Technology'MISiS' 4 Leninsky ProspectMoscow119049Russia The Institute of Microelectronics Technology and High-Purity Materials Russian Academy of Sciences6 Institution StreetChernogolovka142432Russia

Industrial and agricultural activities lead to the release of rare earth elements(REEs)in wastewater and aquatic ecosystems,and their accumulation in ***,the behavior of REEs in soils remains somewhat *** the present work the fractionation and fixation of REEs in soddy-podzolic and chernozem soils spiked with La,Ce,and Nd chlorides were studied using dynamic(continuous flow)extraction,which allows natural conditions to be mimicked and artefacts to be *** eluents applied are aimed to dissolve exchangeable,specifically sorbed,bound to Mn oxides,bound to metal-organic complexes,and bound to amorphous and poorly ordered Fe/Al oxides fractions extractable by 0.05 mol/L Ca(NO_(3))2,0.43 mol/L CH_(3)COOH,0.1 mol/L NH_(2)OH·HCl,0.1 mol/L K_(4)P_(2)O_(7) at pH 11,and 0.1 mol/L(NH4)_(2)C_(2)O_(4) at pH 3.2,*** is found that the fixations of added La,Ce,and Nd in the form of metal-organic complexes is predominant for both types of soils:35%-38%in soddy-podzolic soil and 50%-79%in *** fixation of added elements in the first three fractions(exchangeable,specifically sorbed,and bound to Mn oxides)is significant for soddy-podzolic soil(5%-25%).For chernozem,the relative contents of added Ce and Nd in these fractions are nearly *** the content of exchangeable La is notable,about 5%.Adding any of three elements(La,Ce,or Nd)at the level of100 mg/kg to an initial sample results in changing the fractionation and bioaccessibility of other REEs present in *** contents increase in the first three fractions and decrease in fifth(oxalate extractable)fraction for both soddy-podzolic soil and *** main difference is the behavior of REEs in pyrophosphate extractable *** soddy-podzolic soil,adding La,Ce,or Nd results in decreasing the contents of other REEs associated with organic *** chernozem,on the contrary,the contents of REEs in the form of metal-organic complexes slightly *** processes

关键词： Rare earth elements Soddy-podzolic soil Chernozem Fractionation Competitive binding

Inhalation treatment of lung cancer: the influence of composition, size and shape of nanocarriers on their lung accumulation and retention

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Cancer biology & Medicine 2014年第1期11卷 44-55页

作者： olga b.Garbuzenko Gediminas Mainelis Oleh Taratula Tamara Minko Department of Pharmaceutics Ernest Mario School of Pharmacy Rutgers The State University of New Jersey Department of Environmental Sciences Rutgers The State University of New Jersey Environmental and Occupational Health Sciences Institute Department of Pharmaceutical Sciences Oregon State University Rutgers Cancer Institute of New Jersey

Objective： Various nanoparticles have been designed and tested in order to select optimal carriers for the inhalation delivery ofanticancer drugs to the lungs. Methods： q-he following nanocarriers were studied： micelles, liposomes, mesoporous silica nanoparticles （MSNs）, poly propyleneimine （PPI） dendrimer-siRNA complexes nanoparticles, quantum dots （QDs）, and poly （ethylene glycol） polymers. All particles were characterized using the following methods： dynamic light scattering, zeta potential, atomic force microscopy, in vitro cyto- and genotoxicity. In vivo organ distribution of all nanopartides, retention in the lungs, and anticancer effects of liposomes loaded with doxorubicin were examined in nude mice after the pulmonary or intravenous delivery. Results： Significant differences in lung uptake were found after the inhalation delivery of lipid-based and non-lipid-based nanoparticles. The accumulation ofliposomes and miceUes in lungs remained relatively high even 24 h after inhalation when compared with MSNs, Q Ds, and PPI dendrimers. There were notable differences between nanoparticle accumulation in the lungs and other organs 1 and 3 h after inhalation or intravenous administrations, but 24 h after intravenous injection all nanoparticles were mainly accumulated in the liver, kidneys, and spleen. Inhalation delivery of doxorubicin by liposomes significantly enhanced its anticancer effect and prevented severe adverse side effects of the treatment in mice bearing the orthotopic model of lung cancer. Conclusion： The results of the study demonstrate that lipid-based nanocarriers had considerably higher accumulation and longer retention time in the lungs when compared with non-lipid-based carriers after the inhalation delivery. These particles are most suitable for effective inhalation treatment of lung cancer.

关键词： Nanoparticles drug delivery systems intravenous administration lung neoplasms inhalation administration

GLObAL EXISTENCE,UNIQUENESS,AND STAbILITY FOR A NONLINEAR HYPERbOLIC-PARAbOLIC PRObLEM IN PULSE COMbUSTION

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Acta Mathematica Scientia 2012年第1期32卷 41-74页

作者： olga Terlyga Hamid bellout Frederick bloom Fermi National Laboratory Department of Mathematical Sciences Northern Illinois University

A global existence theorem is established for an initial-boundary value prob- lem, with time-dependent boundary data, arising in a lumped parameter model of pulse combustion; the model in question gives rise to a nonlinear mixed hyperbolic-parabolic sys- tem. Using results previously established for the associated linear problem, a fixed point argument is employed to prove local existence for a regularized version of the nonlinear problem with artificial viscosity. Appropriate a-priori estimates are then derived which imply that the local existence result can be extended to a global existence theorem for the regularized problem. Finally, a different set of a priori estimates is generated which allows for taking the limit as the artificial viscosity parameter converges to zero; the corresponding solution of the regularized problem is then proven to converge to the unique solution of the initial-boundary value problem for the original, nonlinear, hyperbolic-parabolic system.

关键词： pulse combustion hyperbolic-parabolic system global existence regularity

Retina stem cells,hopes and obstacles

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World Journal of Stem Cells 2021年第10期13卷 1446-1479页

作者： olga L German Harmonie Vallese-Maurizi Tamara b Soto Nora P Rotstein Luis Enrique Politi Department of biology Biochemistry and PharmacyUniversidad Nacional del SurBahia blanca 8000Buenos AiresArgentina Department of biology Biochemistry and PharmacyUniversidad Nacional del Surand Neurobiology DepartmentInstituto de Investigaciones Bioquímicas de Bahía Blanca(INIBIBB)ConicetBahía Blanca 8000Buenos AiresArgentina

Retinal degeneration is a major contributor to visual dysfunction *** it comprises several eye diseases,loss of retinal pigment epithelial(RPE)and photoreceptor cells are the major contributors to their *** therapies included diverse treatments,such as provision of anti-vascular endothelial growth factor and many survival and trophic factors that,in some cases,slow down the progression of the degeneration,but do not effectively prevent *** finding of stem cells(SC)in the eye has led to the proposal of cell replacement strategies for retina *** using different types of SC,such as retinal progenitor cells(RPCs),embryonic SC,pluripotent SCs(PSCs),induced PSCs(iPSCs),and mesenchymal stromal cells,capable of self-renewal and of differentiating into multiple cell types,have gained ample *** preclinical studies have assessed transplantation of SC in animal models,with encouraging *** aim of this work is to revise the different preclinical and clinical approaches,analyzing the SC type used,their efficacy,safety,cell attachment and integration,absence of tumor formation and immunorejection,in order to establish which were the most relevant and *** addition,we examine the questions and concerns still open in the *** data demonstrate the existence of two main approaches,aimed at replacing either RPE cells or *** evidence suggests that RPCs and iPSC are the best candidates,presenting no ethical concerns and a low risk of *** trials have already supported the safety and efficacy of SC *** concerns are pending,such as the risk of tumor formation,lack of attachment or integration of transplanted cells into host retinas,immunorejection,cell death,and also ***,the amazing progress in the field in the last few years makes it possible to envisage safe and effective treatments to restore vision loss in a near future.

关键词： Retina regeneration Stem cells Retina stem cell transplantation Cancer stem cells Photoreceptor replacement

bacterial melanin promotes recovery after sciatic nerve injury in rats

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Neural Regeneration Research 2015年第1期10卷 124-127页

作者： olga.V.Gevorkyan Irina b.Meliksetyan Tigran R.Petrosyan Anichka S.Hovsepyan Institute of Physiology National Academy of Sciences of Armenia Department of Kinesiology Armenian State Institute of Physical Culture Scientific and Production Center "Armbiotechnology" National Academy of Sciences of Armenia

bacterial melanin, obtained from the mutant strain of bacillus Thuringiensis, has been shown to promote recovery after central nervous system injury. It is hypothesized, in this study, that bacterial melanin can promote structural and functional recovery after peripheral nerve injury. Rats subjected to sciatic nerve transection were intramuscularly administered bacterial melanin. The sciatic nerve transected rats that did not receive intramuscular administration of bacterial melanin served as controls. behavior tests showed that compared to control rats, the time taken for instrumental conditioned reflex recovery was significantly shorter and the ability to keep the balance on the rotating bar was significantly better in bacterial melanin-treated rats. Histomor- phological tests showed that bacterial melanin promoted axon regeneration after sciatic nerve injury. These findings suggest that bacterial melanin exhibits neuroprotective effects on injured sciatic nerve, contributes to limb motor function recovery, and therefore can be used for rehabil- itation treatment of peripheral nerve injury.

关键词： nerve regeneration peripheral nerve injury sciatic nerve injury bacterial melanin motor function histomorphology behaviors neural regeneration

Performance of low temperature Microbial Fuel Cells(MFCs)catalyzed by mixed bacterial consortia

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Journal of Environmental Sciences 2017年第2期29卷 284-292页

作者： olga Tkach Thangavel Sangeetha Spiridonova Maria Aijie Wang State Key Laboratory of Urban Water Resources and Enuironment(SKLUWRE) Harbin Institute of TechnologyHarbin 150090China. Key Laboratory of Environmental biotechnology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Krasnoyarsk State Institution of Railway Vehicles Krasnoyarsk 660028Russia

Microbial Fuel Cells（MFCs） are a promising technology for treating wastewater in a sustainable manner. In potential applications, low temperatures substantially reduce MFC performance. To better understand the effect of temperature and particularly how bioanodes respond to changes in temperature, we investigated the current generation of mixed-culture and pure-culture MFCs at two low temperatures, 10°C and 5°C. The results implied that the mixed-culture MFC sustainably performed better than the pure-culture（Shewanella） MFC at 10°C, but the electrogenic activity of anodic bacteria was substantially reduced at the lower temperature of 5°C. At 10°C, the maximum output voltage generated with the mixed-culture was 540–560 m V, which was 10%–15% higher than that of Shewanella MFCs. The maximum power density reached 465.3 ± 5.8 m W/m^2 for the mixed-culture at10°C, while only 68.7 ± 3.7 m W/m^2 was achieved with the pure-culture. It was shown that the anodic biofilm of the mixed-culture MFC had a lower overpotential and resistance than the pure-culture MFC. Phylogenetic analysis disclosed the prevalence of Geobacter and Pseudomonas rather than Shewanella in the mixed-culture anodic biofilm, which mitigated the increase of resistance or overpotential at low temperatures.

关键词： Microbial fuel cell Psychrophilic bacteria Shewanella Low temperature bioelectrochemical

Mate choice is affected by parasite infestation rate of the choosing individual as well as of potential mating partners

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Current Zoology 2023年第5期69卷 559-567页

作者： Alejandro Cantarero olga VDolnik Matteo Griggio Herbert Hoi Department of Physiology Veterinary SchoolComplutense University of MadridAvenida Puerta de Hierro s/n28040 MadridSpain Department of Integrative biology and Evolution Konrad Lorenz Institute of Ethology(KLIVV)University of Veterinary Medicine ViennaSavoyenstraße 1aA-1160 ViennaAustria Dipartimento di biologia Universitàdi PadovaVia U.Bassi 58/BI-35131 PadovaItaly

Parasites are known to be a key driving force in mate choice and are important for the expression and evolution of ornaments and behavioral traits being ***,there is little experimental evidence on how the parasite’s burden of the choosing individual is integrated into the mate-choice process and how it affects decision-making,especially in relation to parasite infestation of potential ***,the aim of our study was to determine whether female house sparrows Passer domesticus adjust their mate preference according to their own as well as the parasite load of prospective *** do this,we experimentally manipulated female parasite load and determined their mate preferences prior to and after parasite *** manipulated the chronic coccidian parasite burden of females either by initiating the acute infection phase via re-infecting them with coccidian or by temporally reducing the parasite load of *** then measured the effect of this manipulation on mate preference by presenting females with a choice of four stimuli:three males with similar ornaments,but unmanipulated,naturally varying chronic coccidiosis levels,and an unmanipulated control ***,we recorded some males’behavior in relation to their infection status pointing toward an increased or reduced interest in *** found that females preferred highly infested males prior to manipulation,regardless of their own infestation ***,after manipulation,infested females avoided highly infested males probably in response to the deterioration of their health condition by *** study suggests that mate-choice decisions are more complex when they are mediated by *** implications of parasites for evolutionary theories of sexual signaling and mate choice are discussed.

关键词： coccidiosis female decision mate choice parasites Passer domesticus Isospora spp

The whole day matters: Understanding 24-hour movement guideline adherence and relationships with health indicators across the lifespan

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Journal of Sport and Health Science 2020年第6期9卷 493-510页

作者： Scott Rollo olga Antsygina Mark S.Tremblay Healthy Active Living and Obesity Research Group Children’s Hospital of Eastern Ontario Research InstituteOttawaONK1H 8L1Canada Department of Pediatrics Faculty of MedicineUniversity of OttawaOttawaONK1H 8M5Canada Department of Health Sciences Carleton UniversityOttawaONK1S 5B6Canada

background:New research suggests that the composition(mix)of movement behaviors within a 24-h period may have important implications for health across the *** with this integrated movement behavior paradigm,a number of countries across the world have developed and released 24-h movement guidelines for specific age *** purpose of this systematic review was to examine the associations between the 24-h time-use composition of movement behaviors,or adherence to 24-h movement guidelines,and multiple health indicators across the ***:Five online databases(PsycINFO,PubMed,SPORTDiscus,Web of Science,and Ovid MEDLINE)were searched for relevant peer-reviewed studies published between January 2015 and January 2020 that met the a priori inclusion criteria,with no study design *** methodological quality of research evidence for each individual study and for each health indicator was assessed by using a modified version of the Downs and black ***:A total of 51 studies from 20 different countries met the inclusion criteria.A total of 31 studies examined adherence(meeting *** meeting)to 24-h movement guidelines,and 20 studies used compositional analyses to explore the 24-h time-use composition of movement *** indicated that meeting the 24-h movement guidelines were(1)not associated with adiposity among toddlers,(2)favorably associated with health-related quality of life,social-cognitive development,and behavioral and emotional problems among preschoolers,(3)favorably associated with global cognition,health-related quality of life,and healthy dietary patterns in children,and(4)favorably associated with adiposity,fitness,and cardiometabolic,mental,social,and emotional health among children and *** associations were also found between the composition of 24-h movement behaviors and indicators of(1)adiposity and bone and skeletal health among preschoolers,(2)health-related quality of life among child

关键词： Compositional analysis Movement behaviors Physical activity Sedentary behavior Sleep

Efficiency of high-loaded nickel catalysts modified by Mg in hydrogen storage/extraction using quinoline/decahydroquinoline pair as LOHC substrates

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Journal of Magnesium and Alloys 2024年第8期12卷 3245-3263页

作者： Anton P.Koskin Jingsong Zhang olga b.belskaya olga A.bulavchenko Darya A.Konovalova Sergey A.Stepanenko Arkadiy V.Ishchenko Irina G.Danilova Vyacheslav L.Yurpalov Yurii V.Larichev Roman G.Kukushkin Petr M.Yeletsky Federal Research Center boreskov Institute of Catalysis Sb RAS Acad.Lavrentiev av.5Novosibirsk630090Russian Federation Center of New Chemical Technologies bIC Boreskov Institute of CatalysisNeftezavodskaya st.54Omsk 644040Russia

An effect of Mg introduction on efficiency of high-loaded nickel catalysts in dehydrogenation of decahydroquinoline(10HQ)was inves-tigated.10HQ dehydrogenation is key process for the liquid organic hydrogen carrier(LOHC)storage technology using the quinoline/10HQ pair as H_(2)-lean/H_(2)-rich *** influence of synthesis technique of Ni/Mg/Al catalysts on their properties has been *** catalysts were synthesized through coprecipitation of Ni,Mg,Al precursors to obtain layered double hydroxides(LDH)or via syn-thesis of(∼72 wt%)Ni-Al_(2)O_(3) system-also through coprecipitation,followed by modifying with a magnesium-containing *** the catalysts of the first series,the inclusion of magnesium into LDH lattice led to a significant increase in catalytic activity in hydrogen extraction(10HQ dehydrogenation reaction).Despite the decrease in the content of catalytically active nickel,a significant increase in the yield of the dehydrogenation product was *** regularity is presumably associated with appearance of basic sites,that accelerates the dehydrogenation *** the case of the second series,activity of pre-reduced(600°C,H_(2))catalysts in dehydrogenation of 10HQ also significantly depends on a MgO content and is maximal at Mg:Ni weight ratio *** an in-depth study of structure of the original and reduced catalyst samples(Ni-Al_(2)O_(3) and Ni-MgNiOx-Al_(2)O_(3)),it was shown that this regularity is associated with the increased resistance of catalytically active Ni particles to agglomeration during the reductive ***,using the Ni-MgNiOx-Al_(2)O_(3)catalyst for hydrogen storage process(hydrogenation reaction),the possibility of deep quinoline hydrogenation(up to 10HQ)in a flow-type reactor was demonstrated for the first time.

关键词： Mg-modified catalysts High-loaded nickel catalyst Layered double hydroxides Hydrogen storage LOHC Dehydrogenation