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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

A Cryptograph Domain Image Retrieval Method Based on Paillier Homomorphic Block Encryption

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Computers, Materials & Continua 2018年第5期55卷 285-295页

作者： Wenjia Xu shijun Xiang vasily sachnev school of Information science and Technology Jinan UniversityNo.601West Huangpu AvenueGuangzhou and 510632China Department of Information Communications and Electronic EngineeringThe Catholic University of KoreaSeoul and 02841South Korea

With the rapid development of information network,the computing resources and storage capacity of ordinary users cannot meet their needs of data *** emergence of cloud computing solves this problem but brings data security *** to manage and retrieve ciphertext data effectively becomes a challenging *** these problems,a new image retrieval method in ciphertext domain by block image encrypting based on Paillier homomophic cryptosystem is proposed in this *** can be described as follows:According to the Paillier encryption technology,the image owner encrypts the original image in blocks,obtains the image in ciphertext domain,then passes it to the third party *** server calculates the difference histogram of the image in ciphertext domain according to the public key and establishes the index *** user passes the retrieved image to the *** server computes the differential histogram of the retrieved image by public ***,compares the similarity of it with the histogram in index database and selects larger similarity images in ciphertext and send them to the *** user obtains the target image with the private *** experimental results show that the method is feasible and simple.

关键词： Paillier cryptosystem homomorphic encryption image retrieval feature extraction difference histogram

Revisiting cerebral endothelial cells in Alzheimer’s disease

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Neural Regeneration Research 2025年第10期20卷 2911-2912页

作者： Amira s.Hanafy Department of Neurosurgery University Hospital BonnBonnGermany

Alzheimer’s disease(AD)is the most common neurodegenerative disorder characterized by slow and progressive decline of cognitive and memory *** only approximately 5%of the cases,AD is familial,as often predisposed by genetic mutations(Hoogmartens et al.,2021),while sporadic AD accounts for approximately 95%of the *** amyloid cascade hypothesis is one of the fundamental hypotheses put out to explain AD pathogenesis as dysregulated homeostasis of amyloid-β(Aβ)peptides that leads to the accumulation of Aβplaques in the parenchyma,an anatomical hallmark of AD.

关键词： Alzheimer Aβ cerebral

A systematic review of progenitor survival and maturation in Parkinsonian models

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Neural Regeneration Research 2025年第11期20卷 3172-3178页

作者： Giulia Comini Eilís Dowd Pharmacology&Therapeutics and Galway Neuroscience Center University of GalwayGalwayIreland

stem cell-based brain repair is a promising emergent therapy for Parkinson's disease based on years of foundational research using human fetal donors as a cell *** current therapeutic options for patients,this approach has the potential to provide longterm stem cell–derived reconstruction and restoration of the dopaminergic input to denervated regions of the brain allowing for restoration of certain functions to *** ultimate clinical success of stem cell–derived brain repair will depend on both the safety and efficacy of the approach and the latter is dependent on the ability of the transplanted cells to survive and differentiate into functional dopaminergic neurons in the Parkinsonian *** the pre-clinical literature suggests that there is considerable variability in survival and differentiation between studies,the aim of this systematic review was to assess these parameters in human stem cell-derived dopaminergic progenitor transplant studies in animal models of Parkinson's disease.A defined systematic search of the PubMed database was completed to identify relevant studies published up to March *** screening,76 articles were included in the analysis from which 178 separate transplant studies were *** these,graft survival could be assessed in 52 studies and differentiation in 129 ***,we found that graft survival ranged froms transplanted,with a median of 51%of transplanted cells surviving in the brain;while dopaminergic differentiation of the cells ranged from 0% to 46% of cells transplanted with a median of 3%.This systematic review suggests that there is considerable scope for improvement in the differentiation of stem cell-derived dopaminergic progenitors to maximize the therapeutic potential of this approach for patients.

关键词： cell replacement therapy differentiation embryonic stem cells graft induced pluripotent stem cells Parkinson's disease survival transplant

Fiber-enriched diet helps to control symptoms and improves esophageal motility in patients with non-erosive gastroesophageal reflux disease

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World Journal of Gastroenterology 2018年第21期24卷 2291-2299页

作者： sergey Morozov vasily Isakov Mariya Konovalova department of Gastroenterology and Hepatology Federal Research Center of NutritionBiotechnologyand Food SafetyMoscow 115446Russia

AIM To investigate the effect of dietary fiber on symptoms and esophageal function testing parameters in nonerosive gastroesophageal reflux disease(GERD)(NERD) *** Thirty-six NERD patients with low(study. They were examined with the use of symptom questionnaire(GERD-Q), highresolution esophageal manometry, 24-h esophageal p Himpedance examinations, and food frequency questionnaire before and after 10 d of usual diet supplemented by psyllium 5.0 g TID. Complete data of 30 patients were available to the final analysis. The obtained results were analyzed with the use of non-parametric statistics(Wilcoxon matched pairs test). REsULTs The number of patients experiencing heartburn was less(93.3% at baseline vs 40% at the end of the study, P score decreased(mean ± sD: 10.9 ± 1.7 vs 6.0 ± 2.3, P sting lower esophageal sphincter(LEs) pressure increased from 5.41 ± 10.1 to 11.3 ± 9.4 mm Hg(P = 0.023), but no change in residual LEs pressure and mean resting pressure was found. Total number of gastroesophageal refluxes(GER) decreased from 67.9 ± 17.7 to 42.4 ± 13.5(P s of GERs. No significant change in mean esophageal p H and % of time p H s registered. Maximal reflux time decreased from 10.6 ± 12.0 min to 5.3 ± 3.7 min(P sION Fiber-enriched diet led to a significant increase of minimal lower esophageal sphincter resting pressure, a decrease of number of gastroesophageal refluxes, and a decrease of heartburn frequency per week in NERD.

关键词： gastroesophageal reflux disease psyllium gastroesophageal reflux lower esophageal sphincter relaxation esophageal motility Dietary fiber heartburn non-erosive gastroesophageal reflux disease

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 *** studies were carried out at the Yenisei ecological station“Mirnoye”of the *** Institute of Ecology and Evolution,Russian Academy of *** time series analysis was performed by the wavelet transform using the statistical data processing language *** the 20th century,the dynamics of the population of the community and some of its constituent species(sorex araneus;***;***;***;***;Craseomys rufocanus;Clethrionomys rutilus;Microtus oeconomus;***)were characterized by a 4-year *** type of dynamics changed to noncyclic by the nineties,but by 2022,four species(***,***,***,and ***)and the community as a whole showed a tendency toward recovery of population *** 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

Detrimental and synergistic role of epilepsy——Alzheimer’s disease risk factors

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Neural Regeneration Research 2019年第8期14卷 1376-1377页

作者： Mikhail A. Filippov vasily V. Vorobyov International Medical Cluster Skolkovo Moscow Region Russia Institute of Cell Biophysics Russian Academy of Sciences Pushchino Moscow Region Russia

Identification of individuals at risk for developing Alzheimers disease (AD) is an important issue for its pretreatment. Perspective studies predicting the disease are based on the genetic approaches emerging from the nucleotide polymorphism analysis in different loci through the entire genome in AD patients. Considerable diversity of genes located in these regions raise the question of this diversity's peculiar role in the disease development. The mechanisms of AD have been shown to be associated with the gene variation, increased beta-amyloid production and concomitant epileptiform activity/epilepsy in particular (Palop and Mucke, 2009).

关键词： Detrimental synergistic role disease risk factors

Deciphering the mechanobiology of microglia in traumatic brain injury with advanced microsystems

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Neural Regeneration Research 2025年第8期20卷 2304-2306页

作者： Anthony Procès sylvain Gabriele Univ.Grenoble Alpes InsermU1216Grenoble Institut des NeurosciencesGrenobleFrance Mechanobiology&Biomaterials Group CIRMAPResearch Institute for BiosciencesUniversity of MonsMonsBelgium

Advanced microsystems in traumatic brain injury research:Traumatic brain injury(TBI)results from a mechanical insult to the brain,leading to neuronal and axonal damage and subsequently causing a secondary *** minutes ... 详细信息

关键词： traumatic injury damage

Quantum effects on dislocation motion from ring-polymer molecular dynamics

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npj Computational Materials 2018年第1期4卷 198-203页

作者： Rodrigo Freitas Mark Asta vasily V.Bulatov Department of Materials science and Engineering University of CaliforniaBerkeleyCA 94720USA Lawrence Livermore National Laboratory LivermoreCA 94550USA Materials sciences Division Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA Department of Materials science and Engineering Stanford UniversityStanfordCA 94305USA

Quantum motion of atoms known as zero-point vibration was recently proposed to explain a long-standing discrepancy between theoretically computed and experimentally measured low-temperature plastic strength of iron and possibly other metals with high atomic *** finding challenges the traditional notion that quantum motion of atoms is relatively unimportant in solids comprised of heavy *** we report quantum dynamic simulations of quantum effects on dislocation motion within the exact formalism of Ring-Polymer Molecular Dynamics(RPMD).To extend the reach of quantum atomistic simulations to length and time scales relevant for extended defects in materials,we implemented RPMD in the open-source code LAMMPs thus making the RPMD method widely available to the *** use our RPMD/LAMMPs approach for direct calculations of dislocation mobility and its effects on the yield strength ofα-*** simulation results establish that quantum effects are noticeable at temperatures below 50 K but account for only a modest(≈13% at T=0 K)overall reduction in the Peierls barrier,at variance with the factor of two reduction predicted earlier based on the more approximate framework of harmonic transition state *** results confirm that zero-point vibrations provide ample additional agitation for atomic motion that increases with decreasing temperature,however its enhancing effect on dislocation mobility is largely offset by an increase in the effective atom size,an effect known as quantum dispersion that has not been accounted for in the previous calculations.

关键词： theory quantum motion