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A Comparative Study on the Role of Cytokinins in Caryopsis Development in the Maize miniature1 Seed Mutant and Its Wild Type

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Journal of Integrative Plant Biology 2009年第9期51卷 840-849页

作者： Tomaz Rijavec Maja Kova Ale Kladnik Prem S.Chourey marina Dermastia National Institute of Biology Department of Biotechnology and Systems Biology Department of Biology Biotechnical FacultyUniversity of Ljubljana US Department of Agriculture Agricultural Research ServiceChemistry Research Unit

We report here on a comparative developmental profile of plant hormone cytokinins in relation to cell size, cell number and endoreduplicaUon in developing maize caryopsis of a cell wall invertase-deficient miniature1 （mn1） seed mutant and its wild type, Mn1, genotype. Both genotypes showed extremely high levels of total cytokinins during the very early stages of development, followed by a marked and genotype specific reduction. While the decrease of cytokinins in Mn1 was associated with their deactivation by 9-glucosylation, the absolute and the relative part of active cytokinin forms was higher in the mutant. During the exponential growth phase of endosperm between 6 d after pollination and 9 d after pollination, the mean cell doubling time, the absolute growth rate and the level of endoreduplication were similar in the two genotypes. However, the entire duration of growth was longer in Mnl compared with mnl, resulting in a significantly higher cell number in the Mnl endosperm. These data correlate with the previously reported peak levels of the Mn1-encoded cell wall invertase-2 （INCW2） at 12 d after pollination in the Mn1 endosperm. A model showing possible crosstalk among cytokinins, cell cycle and cell wall invertase as causal to increased cell number and sink strength of the Mn1 developing endosperm is discussed.

关键词： 9-glucosylation cell wall invertase cytokinins maize caryopsis miniature1.

Advancements in transition bimetal catalysts for electrochemical 5-hydroxymethylfurfural(HMF) oxidation

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Journal of Energy Chemistry 2024年第11期98卷 24-46页

作者： Yuwei Li Huiting Huang Mingkun Jiang Wanlong Xi Junyuan Duan marina Ratova Dan Wu Key Laboratory of Green Chemical Engineering Process of Ministry of Education Hubei Key Laboratory of Plasma Chemistry and New MaterialsSchool of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205HubeiChina Faculty of Science and Engineering Manchester Metropolitan UniversityChester 12 StreetManchester M15GDUK

The electrochemical oxidation of 5-hydroxymethylfurfural(HMF) represents a significant avenue for sustainable chemical synthesis, owing to its potential to generate high-value derivatives from biomass feedstocks. Transition metal catalysts offer a cost-effective alternative to precious metals for catalyzing HMF oxidation, with transition bimetallic catalysts emerging as particularly promising candidates. In this review, we delve into the intricate reaction pathways and electrochemical mechanisms underlying HMF oxidation, emphasizing the pivotal role of transition bimetallic catalysts in enhancing catalytic efficiency. Subsequently, various types of transition bimetallic catalysts are explored, detailing their synthesis methods and structural modulation strategies. By elucidating the mechanisms behind catalyst modification and performance enhancement, this review sets the stage for upcoming advancements in the field, ultimately advancing the electrochemical HMF conversion and facilitating the transition towards sustainable chemical production.

关键词： HMF oxidation Transition metal catalysts Bimetallic catalysts Biomass valorization Electrocatalyst synthesis

Utility of routine blood tests after elective laparoscopic cholecystectomy for symptomatic gallstones

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World Journal of Gastrointestinal Surgery 2017年第6期9卷 149-152页

作者： Offir Ben-Ishay marina Zeltser Yoram Kluger Surgical Oncology Pancreatic and Hepatobiliary Surgery ServiceDepartment of General SurgeryDivision of SurgeryRambam Health Care CampusHaifa 35254Israel

AIM To evaluate the value of blood testing after elective laparoscopic cholecystectomy and its association with procedure related *** Charts of all patients undergoing elective laparoscopic cholecystectomy from January 2013 through December2014 were reviewed retrospectively for demographics,indication for surgery,operative course and *** our institution the decision to perform postoperative blood analysis is left for the discretion of the surgeon,therefore we had the possibility to compare the results of those who had blood analyses results to those who did *** was performed to identify variables associated with the decision to perform postoperative blood *** a univariate and multivariate analyses was performed comparing the two *** subgroup analysis was performed to identify factors associated with procedure related *** Five hundred and thirty-two elective laparoscopic cholecystectomies for symptomatic gallstones were performed during the study ***-four percent of the patients(n=340)had blood tests taken post *** that had laboratory tests taken were older(P=0.006,OR=1.01),had longer surgery(P<0.001,OR=3.22)had more drains placed(P<0.001,OR=3.2)and stayed longer in the hospital(P<0.001,OR=1.2).A subgroup analysis of the patients who experienced complications revealed longer stay in the hospital(P<0.001),higher body mass index(BMI)(P=0.04,OR=1.08),increased rates of drain placement(P=0.006,OR=3.1)and higher conversion rates(P=0.01,OR=14.6).Postoperative blood tests withdrawals were not associated with complications(P=0.44).On Multivariate analysis BMI and drain placement were independently associated with *** The current study indicate that routine postoperative blood tests after elective laparoscopic cholecystectomy for symptomatic gallstones does not predict complications and may have an added benefit in diagnosis and management of cases w

关键词： Cholecystectomy Blood tests Laparoscopy Complications Post-operative Gallstones symptomatic

Evaluating the Effect of Various Walking Conditions on KINECT-based Gait Recognition

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Instrumentation 2022年第2期9卷 13-25页

作者： LIU Ruixuan marina L.GAVRILOVA Renmin University of China Beijing 100872China Biometric Technologies Laboratory University of CalgaryCanada

Human gait is one of the unobtrusive behavioral biometrics that has been extensively studied for various commercial and government *** security,medical rehabilitation,virtual reality,and autonomous driving cars are some of the fields of study that rely on accurate gait *** majority of studies have been focused on achieving very high recognition performance on a specific dataset,different issues arise in the real-world applications of this *** research is one of the first to evaluate the effects of changing walking speeds and directions on gait recognition rates under various walking *** was collected using the KINECT *** draw an overall conclusion about the effects of walking speed and di-rection to the sensor,we define distance features and angle ***,we propose two feature fusion methods for person *** of the study provide insights into how walking speeds and walking di-rections to the KINECT sensor influence the accuracy of gait recognition.

关键词： Gait Recognition Kinect Sensor Feature Fusion Walking Conditions Biometric Security

The Role of Institutions:A Cross-country Analysis of Renminbi Trading in Foreign Exchange Markets

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China & World Economy 2022年第3期30卷 42-74页

作者： marina Zucker-Marques Pedro Perfeito da Silva Division on Globalization and Development Strategies United Nations Conference on Trade and Development(UNCTAD)Switzerland Political Science Department Central European UniversityAustria

We explore how China's geographically targeted policies impact RMB overseas use individually or in *** policies include swap agreements,clearing banks,investment quotas,and direct trading between Chinese renminbi(RMB)and non-USD *** a fuzzy-set qualitative comparative analysis and using Bank of International Settlements cross-country data on foreign exchange markets,we find that institution building has lowered the barriers to international adoption of the ***,for countries economically close to China,high RMB trading is explained by either(i)having a clearing bank in the host market and direct quotations between the RMB and the local currency,or(ii)being a financial center and having access to the Chinese capital *** combination of policies is explained by the creation of(i)"trading posts"that provide RMB liquidity abroad,and(ii)channels that allow actors to " recycle" offshore RMB *** triangulate our results with interviews conducted with senior People’s Bank of China officials.

关键词： foreign exchange markets fuzzy-set qualitative comparative analysis institutional context international monetary system offshore RMB trading RMB internationalization

Visible light photocatalytic bismuth oxide coatings are effective at suppressing aquatic cyanobacteria and degrading free-floating genomic DNA

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Journal of Environmental Sciences 2021年第6期33卷 128-136页

作者： James Redfern marina Ratova Andrew PDean James Pritchett Matthieu Grao Joanna Verran Peter Kelly Department of Natural Sciences Faculty of Science and EngineeringManchester Metropolitan UniversityChester StreetM15GDUK Surface Engineering Group Faculty of Science and EngineeringManchester Metropolitan UniversityChester StreetM15GDUK Department of Life Sciences Faculty of Science and EngineeringManchester Metropolitan UniversityChester StreetM15GDUK

Access to safe drinking water free from microbial pollution is an issue of global concern. The use of photocatalytic thin films in water treatment has focused on titanium dioxide, which requires UV-activation, proving a potential barrier to upscaling and implementation in the real world. Visible-light-activated photocatalytic thin films, such as bismuth oxide, have recently been shown to have antimicrobial properties. However, more understanding of the photocatalytic effect on the microbial population in water is required. Glass beads coated with bismuth oxide were incubated with either Microcystis aeruginosa, Anabaena sp. or free-floating genomic DNA. The presence of bismuth oxide-coated glass beads was able to rapidly stop a population of cyanobacteria from increasing. The coated beads were also able to degrade genomic DNA. Leachate from the beads showed no increase in toxicity against human liver cells. This data demonstrates the efficacy of bismuth oxide-coated glass beads for controlling potentially dangerous cyanobacterial populations, whilst potentially reducing the amount of free-floating genomic DNA(an essential issue in the face of antimicrobial resistance) – all of which should be essential considerations in emerging water treatment technologies.

关键词： Photocatalysis Bismuth oxide Cyanobacteria Water treatment Antimicrobial

Electrolyte manipulation on Cu-based electrocatalysts for electrochemical CO_(2) reduction

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Journal of Energy Chemistry 2024年第12期99卷 201-222页

作者： Hexin Zhou Wanlong Xi Peng Yang Huiting Huang Jia Tian marina Ratova Dan Wu Key Laboratory of Green Chemical Engineering Process of Ministry of Education Hubei Key Laboratory of Plasma Chemistry and New MaterialsSchool of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205HubeiChina Faculty of Science and Engineering Manchester Metropolitan UniversityChester 12 StreetManchester M15GDUK

Electrocatalytic reduction of CO_(2)is crucial for environmental sustainability and renewable energy storage,with Cu-based catalysts excelling in producing high-value C_(2+)***,a comprehensive analysis of how specific electrolyte influences Cu-based catalysts is *** review addresses this gap by focusing on how electrolytes impact surface reconstruction and the CO_(2) reduction process on Cu-based electrocatalysts,identifying specific electrolyte compositions that enhance the density and stability of active sites,and providing insights into how different electrolyte environments modulate the selectivity and efficiency of C_(2+)product *** review begins by exploring how electrolytes induce favorable surface reconstruction in Cu-based catalysts,affecting surface roughness through dissolution-redeposition of Cu species and interactions with halogens and molecular *** also covers changes in crystalline facets of Cu and Cu_(2)O,and oxidation states,highlighting transitions from Cu^(0) to Cu^(δ+)and the stabilization of Cu^(+).The role of electrolytes in the C–C coupling process is examined,emphasizing their effects in modulating mass and charge transfer,CO_(2) adsorption,intermediate evolution,and product ***,the mechanisms by non-aqueous electrolytes,including organic solvents,ionic liquids,and mixed electrolytes,affecting CO_(2) reduction are analyzed,highlighting the unique advantages and challenges of each *** review concludes by addressing current challenges,proposing solutions,and research directions,such as optimizing electrolyte composition by integrating diverse cations and anions and employing advanced in-situ characterization *** insights can significantly enhance CO_(2)reduction performance on Cu-based electrocatalysts,advancing efficient and sustainable green energy technologies.

关键词： CO_(2)reduction reaction Cu-based catalyst Electrolyte Surface reconstruction Intermediates evolution

Determination of L-norvaline and L-tryptophan in dietary supplements by nano-LC using an O-[2-(methacryloyloxy)-ethylcarbamoyl]-10,11- dihydroquinidine-silica hybrid monolithic column

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Journal of Pharmaceutical Analysis 2020年第1期10卷 70-77页

作者： Dongsheng Xu Elena Sanchez-Lopez Qiqin Wang Zhengjin Jiang María Luisa marina Departamento de Química Analítica Química Física e Ingeniería QuímicaUniversidad de AlcalaCtra.Madrid-Barcelona Km.33.60028871Alcala de Henares(Madrid)Spain Institute of Pharmaceutical Analysis College of PharmacyJinan UniversityGuangzhou510632China Department of Pharmacy and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine&New Drug Research Jinan UniversityGuangzhou510632China Instituto de Investigacion Química“Andres M.del Río”(IQAR) Universidad de AlcalaCtra.Madrid-Barcelona Km.33.60028871Alcala de Henares(Madrid)Spain

An analytical methodology based on an O-[2-(methacryloyloxy)-ethylcarbamoyl]-10,11-dihydroquinidine(MQD)-silica hybrid monolithic column was developed for the enantioseparation of 9-fluorenylmethoxycarbonyl(FMOC)derivatized amino acids by nano-liquid *** mobile phase was optimized including the apparent pH,content of ACN,and concentration of the buffer to obtain a satisfactory enantioresolution performance.27 FMOC derivatized amino acids including 19 protein and 8 non-protein amino acids were tested,and 19 out of them were enantiomerically discriminated obtaining baseline separation for 11 of *** characteristics of the method were evaluated for norvaline and tryptophan in terms of linearity,precision,accuracy,limits of detection(LOD)and quantitation(LOQ)showing good performance to be applied to the enantiomeric determination of these amino acids in dietary *** and LOQ values were 9.3 and 31 mM for norvaline enantiomers and 7.5 and 25 mM for tryptophan enantiomers,*** contents of D-norvaline and D-tryptophan were below their respective LODs in all the analyzed *** of L-tryptophan and L-norvaline showed good agreement with the labeled contents except for one sample which did not show presence of L-norvaline,contrary to the label indication.

关键词： 9-Fluorenylmethoxycarbonyl Amino acids Chiral separation Nano-LC Quinidine-silica hybrid monolithic column

Methodology for Road Defect Detection and Administration Based on Mobile Mapping Data

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Computer Modeling in Engineering & Sciences 2021年第10期129卷 207-226页

作者： marina Davidovic Tatjana Kuzmic Dejan Vasic Valentin Wich Ansgar Brunn Vladimir Bulatovic Department for Civil Engineering and Geodesy Faculty of Technical SciencesUniversity of Novi SadNovi Sad21000Serbia University of Applied Sciences Wurzburg-Schweinfurt W urzburg-Schweinfurt97070Germany

A detailed inspection of roads requires highly detailed spatial data with sufficient precision to deliver an accurate geometry and to describe road defects *** paper presents a novel method for the detection of road *** input data for road defect detection included point clouds and orthomosaics gathered by mobile mapping *** defects were categorized in three major groups with the following geometric primitives:points,lines and *** method suggests the detection of point objects from matched point clouds,panoramic images and ortho *** were mapped as point,line or polygon geometries,directly derived from orthomosaics and panoramic *** the geometric position of road defects,all objects were assigned to a variety of attributes:defect type,surface material,center-of-gravity,area,length,corresponding image of the defect and degree of damage.A spatial dataset comprising defect values with a matching data type was created to perform the attribute analysis quickly and *** final product is a spatial vector data set,consisting of points,lines and polygons,which contains attributes with further information and *** paper demonstrates that mobile mapping suits a large-scale feature extraction of road infrastructure *** its simplicity and flexibility,the presented methodology allows it to be easily adapted to extract further feature types with their *** makes the proposed approach a vital tool for data extraction settings with multiple mobile mapping data analysts,e.g.,offline crowdsourcing.

关键词： Deformation detection engineering visual inspection data analyses mobile mapping GIS