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Factors that influence the results of indirect decompression employing oblique lumbar interbody fusion

World Journal of Orthopedics 2024年第8期15卷 734-743页

作者： Andrey E Bokov svetlana Y Kalinina Mingiyan I Khaltyrov Alexandr P Saifullin Anatoliy A Bulkin Department of Neurosurgery Institute of Traumatology and OrthopedicsPrivolzhsky Research Medical UniversityNizhny Novgorod603005Russia Department of Traumatology Orthopedics and NeurosurgeryPrivolzhsky Research Medical UniversityNizhny Novgorod603005Russia

BACKGROUND Indirect decompression is one of the potential benefits of anterior reconstruction in patients with spinal *** the other hand,the reported rate of revision surgery after indirect decompression highlights the necessity of working out prediction models for the radiographic results of indirect decompression with assessing their clinical *** To assess factors that influence radiographic and clinical results of the indirect decompression in patients with stenosis of the lumbar *** This study is a single-center cross-sectional evaluation of 80 consecutive patients(17 males and 63 females)with lumbar spinal stenosis combined with the instability of the lumbar spinal *** underwent single level or bisegmental spinal instrumentation employing oblique lumbar interbody fusion(OLIF)with percutaneous pedicle screw *** results of the indirect decompression were assessed using computerized tomography,while MacNab scale was used to assess clinical *** After indirect decompression employing anterior reconstruction using OLIF,the statistically significant increase in the disc space height,vertebral canal square,right and left lateral canal depth were detected(Р<0.0001).The median(M)relative vertebral canal square increase came toМ=24.5%with 25%-75%quartile border(16.3%;33.3%)if indirect decompression was achieved by restoration of the segment *** patients with the reduction of the upper vertebrae slip,the median of the relative increase in vertebral canal square accounted for 49.5%with 25%-75%quartile border(2.35;99.75).Six out of 80 patients(7.5%)presented with unsatisfactory results because of residual nerve root *** critical values for lateral recess depth and vertebral canal square that were associated with indirect decompression failure were 3 mm and 80 mm2 *** Indirect decompression employing anterior reconstruction is achieved by the increase in disc height al

关键词： Indirect decompression Anterior reconstruction Central lumbar spinal stenosis Degenerative spondylolisthesis Lateral recess stenosis Spinal instability Oblique lateral interbody fusion

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In vivo femtosecond laser nanosurgery of the cell wall enabling patch-clamp measurements on filamentous fungi

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Microsystems & Nanoengineering 2024年第2期10卷 251-267页

作者： Tanja Pajić Katarina Stevanović Nataša V.Todorović Aleksandar J.Krmpot Miroslav Živić svetlana Savić-Šević Steva M.Lević Marina Stanić Dejan Pantelić Brana Jelenković Mihailo D.Rabasović Institute of Physiology and Biochemistry“Ivan Djaja” Faculty of BiologyUniversity of BelgradeStudentski trg 1611158BelgradeSerbia Institute for Biological Research“Siniša Stanković” University of BelgradeNational Institute of the Republic of SerbiaBulevar Despota Stefana 14211000BelgradeSerbia Institute of Physics Belgrade University of BelgradeNational Institute of the Republic of SerbiaPregrevica 11811080BelgradeSerbia University of Belgrade Faculty of AgricultureNemanjina Street 611080BelgradeSerbia Institute for Multidisciplinary Research University of BelgradeKneza Višeslava 111030BelgradeSerbia

Studying the membrane physiology of filamentous fungi is key to understanding their interactions with the environment and crucial for developing new therapeutic strategies for disease-causing ***,their plasma membrane has been inaccessible for a micron-sized patch-clamp pipette for pA current recordings due to the rigid chitinous cell ***,we report the first femtosecond IR laser nanosurgery of the cell wall of the filamentous fungi,which enabled patch-clamp measurements on protoplasts released from hyphae.A reproducible and highly precise(diffraction-limited,submicron resolution)method for obtaining viable released protoplasts was *** release from the nanosurgery-generated incisions in the cell wall was achieved from different regions of the *** plasma membrane of the obtained protoplasts formed tight and high-resistance(GΩ)contacts with the recording *** entire nanosurgical procedure followed by the patch-clamp technique could be completed in less than 1 *** to previous studies using heterologously expressed channels,this technique provides the opportunity to identify new ionic currents and to study the properties of the ion channels in the protoplasts of filamentous fungi in their native environment.

关键词： patch recording laser

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超表面:塑造光子学的未来

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Science Bulletin 2024年第11期69卷 1607-1611页

作者： Nikolay L.Kazanskiy svetlana N.Khonina Muhammad A.Butt Samara National Research University Samara 443086Russia

A metasurface, often abbreviated as MS, represents a thin, artificially crafted surface consisting of an assembly of subwavelength structures that interact with light in distinct manners. Typically,smaller than the wavelength of the light they engage with, these structures empower precise management of light properties such as polarization, phase, and amplitude.

关键词： precise abbreviated 光子学

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Mo改性Pd/NaY催化剂用于甲醇间接氧化羰基化合成碳酸二甲酯

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Chinese Journal of Catalysis 2024年第5期60卷 327-336页

作者：黄恪袁世诚梅荣艳杨歌白鹏郭海玲王纯正 svetlana Mintova 中国石油大学(华东) 化学化工学院重质油全国重点实验室山东青岛266580 青岛科技大学化工学院先进陶瓷与机械加工技术教育部重点实验室山东青岛266042 法国国家科学研究中心催化与光谱实验室法国卡昂

碳酸二甲酯(DMC)因具有较好的溶解性、生物降解性和低毒性,而被认为是一种绿色化学品.其用途广泛,不仅用于合成聚碳酸酯,还是锂离子电池电解液、燃料添加剂以及羰基化和甲基化反应的重要试剂.在众多合成方法中,CH_(3)OH间接氧化羰基化合... 详细信息

碳酸二甲酯(DMC)因具有较好的溶解性、生物降解性和低毒性,而被认为是一种绿色化学品.其用途广泛,不仅用于合成聚碳酸酯,还是锂离子电池电解液、燃料添加剂以及羰基化和甲基化反应的重要试剂.在众多合成方法中,CH_(3)OH间接氧化羰基化合成DMC,具有无爆炸风险、反应条件温和以及原子经济性高等优点,因而展现出广阔的应用前景.然而,这一过程中使用的无氯Pd/NaY催化剂存在以下问题:Pd2+活性物种容易被反应物CO还原成Pd0物种,导致Pd烧结和催化剂失活.因此,如何在催化过程中保持Pd2+物种的稳定,是当前面临的一个重要挑战.本文采用“自上而下”的方法,制备了Mo改性的Pd/NaY催化剂(Pd-Mo/NaY).该催化剂在保持贵金属Pd氧化态的同时,增强了对反应物CO的吸附能力,进而提高了催化剂的稳定性.在CH_(3)OH间接氧化羰基化制DMC反应中,Pd-Mo/NaY表现出比Pd/NaY催化剂更高的催化活性和稳定性.在30 h的反应过程中,Pd-Mo/NaY催化剂上的CO转化率稳定维持在约97%,而Pd/NaY催化剂上的CO转化率则从94%逐渐下降至70%.此外,Pd-Mo/NaY催化剂的本征活性(TOF)为0.019 s^(-1),也明显高于Pd/NaY催化剂的0.005 s^(-1).X射线衍射、物理吸附和扫描电镜结果表明,Mo改性未显著改变Pd/NaY的物相结构、孔结构性质与微观形貌.透射电镜与扫描电镜能谱结果表明,两个催化剂的Pd聚集状态存在显著差异.Pd/NaY催化剂中Pd物种发生了明显聚集,Pd颗粒平均尺寸达到10.2 nm;而Pd-Mo/NaY催化剂中,大部分Pd物种仍保持高度分散的状态,仅有少量聚集的Pd颗粒,其平均尺寸仅为2.3 nm.通过羟基红外、吡啶红外与氨气程序升温脱附表征技术进一步研究了催化性能与Pd聚集状态差异的原因.结果表明,Mo的引入有效减少了因Pd离子交换过程引入的桥式羟基,从而降低了Pd-Mo/NaY催化剂的酸性.此外,氢气程序升温还原与X射线光电子能谱结果进一步揭示,Pd与Mo之间的相互作用调变了Pd-Mo/NaY的活性位结构,阻碍了活性Pd^(2+)物种被反应物CO还原为Pd0物种,从而有效缓解了Pd物种的聚集.CO漫反射红外与CO低温透射红外研究则表明,Pd-Mo之间的相互作用以及Pd2+活性位点的增加,显著增强了催化剂对反应物CO的吸附能力.通过原位漫反射红外(DRIFTS)实验捕获了COOCH_(3)*关键反应中间体,并发现无论是Pd/NaY催化剂还是Mo改性的Pd-Mo/NaY催化剂,均遵循相似的反应路径,并具有相同的决速步骤.综上,本文通过Mo对Pd/NaY催化剂进行改性,有效抑制了反应过程中贵金属Pd的烧结,从而显著提高Pd-Mo/NaY催化剂的稳定性.通过这一改性方法,实现了活性Pd2+物种的高度稳定,为甲醇间接氧化羰基化制DMC催化剂的研发提供了新思路.

关键词：分子筛 NaY 钯羰基化碳酸二甲酯

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Olefin Polymerization Behavior of Titanium(IV) Complexes with Fluorinated and Non-fluorinated Aliphatic Phenoxyimine Ligands

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Chinese Journal of Polymer Science 2024年第1期42卷 52-62,I0007页

作者： Vladislav A.Tuskaev Kasim F.Magomedov svetlana Ch.Gagieva Dmitry A.Kurmaev Yulia V.Nelyubina Evgenii K.Golubev Maria D.Evseeva Viktor G.Vasil'ev Galina G.Nikiforova Mikhail I.Buzin Vyacheslav S.Bogdanov Boris M.Bulychev Department of Chemistry M.V.Lomonosov Moscow State UniversityMoscow 119992Russian Federation A.N.Nesmeyanov Institute of Organoelement Compounds Russian Academy of SciencesMoscow119991Russian Federation Enikolopov Institute of Synthetic Polymer Materials Russian Academy of SciencesMoscow 117393Russian Federation

A series of Ti(Ⅳ) dichloride and dialkoxide com plexes with phenoxyimine ligands containing fluorinated and nonfluorinated aliphatic imine fragments have been *** molecular structures of complexes 1 and 4 were established by single-crystal X-ray diffraction *** complexes adopt a distorted octahedral coordination structure around the titanium atom and two oxygen atoms are situated in trans position while two nitrogen atoms and two outgoing ligands(Cl or iPrO) are situated in cis *** of activators(MMAO-12 and combinations Et_nAICl_(3-n)+Bu_(2)Mg) and outgoing ligand(Cl or iPrO) nature on the catalytic activity and properties of the resulting polymers was *** Ti complexes,despite the nature of the outgoing ligands(Cl or iPrO) in the presence of Al/Mg activators,was found to display a high ethylene polymerization activity in the range 1600-3830 kg_(polymer)·mol_(Ti)^(-1)·h^(-1)·atm^(-1) with a viscosity average molecular weight(M_v) value in the range 1.1×10~6-7.1×10~6 Dalton(Da).The resulting UHMWPE can be processed by a solventless method into high-strength and high-modulus oriented *** rheological characteristics of a polymer melt have been *** absence of a cross-over point did not allow to compare the values of the molecular weight distribution of polymers obtained on fluorinated and non-fluorinated pre-catalysts,however,the estimation of the entanglement density is in good agreement with the mechanical characteristics of oriented film *** activation with methylalumoxane,the activity of the com plexes decreased very significantly;however,a polymer with a molecular weight of about 12 million Da was *** the process of ethylene/octene-1 copolymerization,fluorine-containing precatalysts showed a clear advantage over non-fluorinated analogues both in activity and in comonomer content.

关键词： FI catalysts Titanium(IV) (Co)polymerization Al/Mg co-catalyst Ultra-high molecular weight polyethylene

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Elucidating elusive quaternary selenide EuCeCuSe3:Synthesis,crystal structure,properties and theoretical studies

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Journal of Rare Earths 2024年第1期42卷 163-171,I0006页

作者： Maxim V.Grigoriev Anna V.Ruseikina Maxim S.Molokeev Vladimir A.Chernyshev Aleksandr S.Aleksandrovsky Alexander S.Krylov svetlana N.Krylova Nikolai P.Shestakov Dmitriy A.Velikanov Alexander A.Garmonov Alexey V.Matigorov Evgeny A.Ostapchuk Thomas Schleid Damir A.Safin Laboratory of Theory and Optimization of Chemical and Technological Processes University of TyumenVolodarskogo Str.6625003TyumenRussian Federation Kirensky Institute of Physics Federal Research Center KSC SB RASAkademgorodok 50 Bld.38660036KrasnoyarskRussian Federation Department of Physics Far Eastern State Transport UniversitySerysheva Str.47680021KrasnoyarskRussian Federation Institute of Natural Sciences and Mathematics Ural Federal University Named After the First President of Russia B.N.YeltsinMira Str.19620002EkaterinburgRussian Federation Department of Photonics and Laser Technology Siberian Federal UniversitySvobodnii Ave.79660079KrasnoyarskRussian Federation Institute of Physics and Technology University of TyumenVolodarskogo Str.6625003 TyumenRussian Federation Institute for Inorganic Chemistry University of StuttgartPfaffenwaldring 55D-70569StuttgartGermany Scientific and Educational and Innovation Center for Chemical and Pharmaceutical Technologies Ural Federal University named after the First President of Russia B.N.YeltsinMira Str.19620002 EkaterinburgRussian Federation University of Tyumen Volodarskogo Str.6625003TyumenRussian Federation

We report on the novel heterometallic quaternary selenide EuCeCuSe3,the fabrication of which has been a challenge until this *** structure of the reported selenide was elucidated from the powder X-ray diffraction data,which revealed the formation of EuCeCuSe3with excellent yield(96.7%)accompanied with a minor fraction of CeSe2(3.3%),and was best solved in orthorhombic space group Pnma with the BaLaCuS3structural ***,the crystal structure of the title compound completes the row of the heterometallic quaternary selenides EuRECuSe3(RE=La,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Y),of which the cerium-based derivative exclusively belongs to the BaLaCuS3structural *** distortion of the CuSe4polyhedron was compared for the whole series of EuRECuSe3compounds using theτ4-descriptor for four coordinated ions,which revealed the highest degree of distortion for the Ce3+-containing selenide,followed by the La3+-based ***,the crystallographic and geometrical parameters of the reported selenide were discussed in comparison to the Ce3+-based sulfides SrCeCuS3and *** initio calculations of the crystal structure,a phonon spectrum and elastic constants for the crystal of EuCeCuSe3were also *** types and wavenumbers of fundame ntal modes were determined and the involvement of ions participating in the phonon modes was *** experimental IR spectrum of the reported selenide was interpreted and found to be in agreement with the calculated *** experimental direct band gap of EuCeCuSe3was measured to be 1.36 eV that is consistent with the concept of its origin due to interband transitions between orbitals emerging mainly from 4f(valence band)and 5d(conduction band)levels of the Eu2+*** dependence of the Young’s modulus on the direction demonstrates the anisotropy of the elastic properties,while the Vickers hardness for EuCeCuSe3was calculated to be 5.2 ***,the title compound is paramagnetic above 4 K.

关键词： Quaternary selenide Synthesis Crystal structure Ab initio calculations Magnetic measurements Spectroscopy

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Why ecosystem characteristics predicted from remotely sensed data are unbiased and biased at the same time-and how this affects applications

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Forest Ecosystems 2024年第1期11卷 24-31页

作者： Goran Ståhl Terje Gobakken svetlana Saarela Henrik J.Persson Magnus Ekstrom Sean P.Healey Zhiqiang Yang Johan Holmgren Eva Lindberg Kenneth Nystrom Emanuele Papucci Patrik Ulvdal Hans OleØrka Erik Næsset Zhengyang Hou Håkan Olsson Ronald E.McRoberts Department of Forest Resource Management Swedish University of Agricultural Sciences90183UmeåSweden Faculty of Environmental Sciences and Natural Resource Management Norwegian University of Life SciencesÅsNorway USDA Forest Service Rocky Mountain Research StationOgdenUTUSA The Key Laboratory for Silviculture and Conservation of Ministry of Education Beijing Forestry UniversityBeijing100083China Department of Forest Resources University of MinnesotaSt.PaulMNUSA

Remotely sensed data are frequently used for predicting and mapping ecosystem characteristics,and spatially explicit wall-to-wall information is sometimes proposed as the best possible source of information for ***,wall-to-wall information typically relies on model-based prediction,and several features of model-based prediction should be understood before extensively relying on this type of *** such feature is that model-based predictors can be considered both unbiased and biased at the same time,which has important implications in several areas of *** this discussion paper,we first describe the conventional model-unbiasedness paradigm that underpins most prediction techniques using remotely sensed(or other)auxiliary *** this point of view,model-based predictors are typically ***,we show that for specific domains,identified based on their true values,the same model-based predictors can be considered biased,and sometimes severely *** suggest distinguishing between conventional model-bias,defined in the statistical literature as the difference between the expected value of a predictor and the expected value of the quantity being predicted,and design-bias of model-based estimators,defined as the difference between the expected value of a model-based estimator and the true value of the quantity being *** show that model-based estimators(or predictors)are typically design-biased,and that there is a trend in the design-bias from overestimating small true values to underestimating large true ***,we give examples of applications where this is important to acknowledge and to potentially make adjustments to correct for the design-bias *** argue that relying entirely on conventional model-unbiasedness may lead to mistakes in several areas of application that use predictions from remotely sensed data.

关键词： Bias Model-based inference Design-based inference

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Extraction, Production and Quality Evaluation of Margarine from Oil Extracted from Waste Biomass Peels of Avocado and Virgin Coconut Oil, Using Chitosan from Reared Shells as Preservative

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Journal of Agricultural Chemistry and Environment 2024年第1期13卷 142-168页

作者： Suh-Ndale svetlana Miyanui Pride Ndasi Ngwasiri Wiyeh Claudette Bakisu Muala Noumo Thierry Ngangmou Wilson Agwanande Ambindei Martin Benoit Ngassoum Department of Nutrition Food and Bioresource Technology College of Technology University of Bamenda Bamenda Cameroon Department of Process Engineering ENSAI University of Ngaoundere Ngaoundere Cameroon Department of Applied Chemistry ENSAI University of Ngaoundere Ngaoundere Cameroon

The production and consumption of avocado pears generates tons of wastes, mainly the pear peels which are usually discarded, although they have been reported to contain important phyto-chemicals with biological activities. The adverse health effect associated with the consumption of saturated lipid based foods has ignited research on reformulation of lipid based foods to eliminate Trans Fatty Acids (TFAs). This study was thus aimed at the extraction and characterization of oil from Avocado Peels (APO) and evaluation of the quality of margarine produced from it. Five verities of pear were used for oil extraction by soxhlet method and physiochemical, oxidative, functional and antioxidant characterization was done. Margarines were formulated using a central composite design using oil blends of APO and Virgin Coconut Oil (VCO) with an oil ratio of 10:90, 40:60, 70:30 respectively, varied blending speed, blending time, and chitosan concentration. Samples were characterized and the effect of process parameters on the physiochemical and functional properties of the margarine studied. Optimized conditions were used to produce samples for sensory evaluation. Color, spreadability, aroma, taste and general acceptability was evaluated using ranking difference test. The results showed that the yield, density, and iodine values of APOs oils ranged from 14.91 ± 0.18 to 11.76 ± 0.46;0.93 ± 0.001 to 0.99 ± 0.1;46.63 ± 1.70 to 52.4 ± 0.63, their acid values, TBA and PV values ranged from 1.42 ± 0.39 to 1.97 ± 0.5;0.11 ± 0.002 to 0.18 ± 0.04;and 2.72 ± 0.14 to 4.43 ± 0.36 respectively, with Brogdon avocado peel variety having the overall best properties prepared blends of trans-free APO margarines showed that increase in APO ratio decreased melting point, increased oxidative stability and reduced moisture content of margarine samples. Chitosan addition leads to decrease moisture content and increase functional properties. VCO lead to increase in phenolic and flavonoid content of the m

关键词： Food Waste Avocado Peels Extraction Oil Biological Activity Margarine Chitosan

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Maximizing catalytic efficiency with bio-inspired hierarchical porous zeolites

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National Science Review 2023年第7期10卷 74-76页

作者： svetlana Mintova Laboratory of Catalysis and Spectrochemistry (LCS) ENSICAEN CNRS Normandy University

Hierarchical porous materials are characterized by their elegant interconnectivity and regularity across multiple length scales,which enables rapid mass transfer,exchange,and high catalytic performance [1].Thhese advanced materials differ from single-length-scale porous materials like microporous zeolites [2],mesoporous MCM-41 [3],SBA-15 [4]and MOF [5],and they are considered to be the second generation of porous materials [1,6].These materials haveattracted significant academic and industrial attention [7].

关键词： SILICA

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纳米材料在植物激素中的应用及研究进展

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仲恺农业工程学院学报 2024年第3期37卷 66-77页

作者：林依彤尹国强周红军 BABITSKAYA svetlana 周新华左继浩仲恺农业工程学院化学化工学院广东广州510225 仲恺农业工程学院广东省普通高校农业绿色精细化学品重点实验室广东广州510225 白俄罗斯国家科学院生物有机化学研究所明斯克州明斯克220141

对纳米技术在植物激素中的应用,包括单一纳米材料对内源植物激素的影响、纳米粒子-外源植物激素复合材料以及负载植物激素的纳米材料在植物中的应用进行了综述,对未来纳米技术在植物激素施用过程中的发展进行了展望.

关键词：纳米技术植物激素缓控释体系

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