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Photoluminescence,structural and antibacterial properties of co-dopedβ-Ca_(3)(PO_(4))_(2)-type phosphates Ca_(8)CuRE(PO_(4))_(7)(RE=Eu-Er)

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Journal of Rare Earths 2024年第9期42卷 1658-1668,I0002页

作者： Ivan V.Nikiforov Ekaterina V.Iliin Bogdan I.Lazoryak Sergey m.Aksenov Pavel V.Slukin Dina V.Deyneko Department of Chemistry Lomonosov Moscow State University119991MoscowRussia Laboratory of Arctic mineralogy and material Sciences Kola Science CentreRussian Academy of Sciences184209ApatityRussia Geological Institute Kola Science CentreRussian Academy of Sciences184209ApatityRussia State Scientific Center of Applied microbiology and Biotechnology of Rospotrebnadzor 24 Block A142279ObolenskRussia

Novel Ca_(8)CuRE(PO_(4))_(7)where RE^(3+)=Eu^(3+),Tb^(3+),dy^(3+),Ho^(3+)and Er^(3+)were synthesized by a solid-state method in *** structures of the samples were characterized by powder X-ray diffraction using Rietveld refinement to determine the occupation of crystal *** samples are found to have a centrosymmetric structure with space group R3c,as shown by dielectric *** synthesized Ca_(8)CuRE(PO_(4))_(7)samples have multifunctional *** Cu^(2+)ions provide antibacterial properties,while the rare earth elements ions exhibit luminescence properties,and theβ-Ca_3(PO_(4))_(2)-type host is *** photoluminescence properties of RE^(3+)ions were studied and compared with other simmilar Ca_(8)mRE(PO_(4))_(7)phosphates,where m is a divalent *** photoluminescence intensity quenching in terms of energy transfer from RE^(3+)to Cu^(2+)is *** bioactive properties were studied in relation to antibacterial activity against *** and *** syntesized Ca_(8)CuRE(PO_(4))_(7)samples demonstrate very high and stable inhibition of bacteria *** correlation between crystal structure and properties is *** combining multiple approaches to the directio nal design of such materials,several important properties within a single chemical compound to achieve biovisualization and bioactive properties simultaneously can be combined.

关键词： β-Ca_(3)(PO_(4))_(2) Whitlockite-type structure Bioactive phosphates TCP Photoluminescence Rare earths

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On the Contribution of the Stochastic Integrals to Econometrics

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Applied mathematics 2019年第12期10卷 1048-1070页

作者： Lewis N. K. mambo Rostin m. m. mabela Isaac K. Kanyama Eugène m. mbuyi Department of Economics University of Kinshasa Kinshasa Congo Direction of Research and Statistics Central Bank of Congo Kinshasa Congo Department of mathematics and Computer Science University of Kinshasa Kinshasa Congo Department of Economics and Econometrics University of Johannesburg Johannesburg South Africa

The purpose of this paper is to present the theorical connection between the Itôstochastic calculus and the Financial Econometrics. This paper has two contributions. First, we give the backgrounds on how the stochastic calculus is used to model the real data with the uncertainties. Finally, by using Consumer Price Index (CPI) from the Central Bank of Congo and combining the Itôstochastic calculus and the AR (1)-GARCH (1, 1) model, we estimate the stochastic volatility of inflation rate measuring efficency of monetary policy. Thus the stochastic integrals are the powerful tools of mathematical modelling and econometric analysis.

关键词： Stochastic Continuous-Time models Stochastic Volatility AR (1)-GARCH (1 1) models Inflation Rate

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Jupiter^(Tm)采用精密星历、钟差修正和电离层格网模型的GPS定位结果

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测绘通报 1997年第3期 33-39页

作者： Gao,dy 赫建忠

在过去几年里，人们开始注意采用精密ＧＰＳ卫星星历、卫星钟修正和电离层模型作为替代传统的ＤＧＰＳ经济实用的方法。精密星历和卫星钟修正可用于消除广播星历和卫星钟的误差影响，还包括克服ＳＡ的影响。另一方面，精确的电离层模型... 详细信息

在过去几年里，人们开始注意采用精密ＧＰＳ卫星星历、卫星钟修正和电离层模型作为替代传统的ＤＧＰＳ经济实用的方法。精密星历和卫星钟修正可用于消除广播星历和卫星钟的误差影响，还包括克服ＳＡ的影响。另一方面，精确的电离层模型对单频用户很重要。它比只采用标准广播电离层模型能得到更好的电离层延迟。本文研究了采用从加拿大现行的控制系统获得的精密星历、卫星钟修正以及电离层格网模型所获得的定位精度。采用了在ＡｌｇｏｎｑｕｉｎＰａｒｋ，Ｏｎｔａｒｉｏ和Ａｌｂｅｒｔａ的卡尔加里大学所采集的数据组进行了一些试验，并运用Ｐｕｌｓｅａｒｃｈ开发的ＧＰＳ后处理软件包ＪｕｐｉｔｅｒＴＭ进行全部数据处理及管理。计算非平滑连续的最小二乘定位结果，结果再与测站的已知坐标相比较。结果显示：采用精密星历和钟修正可以获得１ｍ～３ｍ的定位精度。采用由加拿大地学信息大地测量分部开发的精密的电离层格网模型能提高点的平面定位精度。

关键词：测量 GPS 定位星历钟差修正格网模型

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Prognostic Signification of Admission Hyperglycemia among Acute Stroke Patients in Intensive Care Units in Kinshasa,the Democratic Republic of the Congo

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World Journal of Cardiovascular Diseases 2019年第9期9卷 665-680页

作者： Josée K.Tshituta Francois B.Lepira Francois P.Kajingulu Jean Robert R.makulo Ernest K.Sumaili Pierre Z.Akilimali Aliocha N.Nkodila fre.dy m.mbuyi Angele I.masewu Stephane mutombo Eric B.Amisi Jean Pierre m.Ilunga Wilfrid B.mbombo Patrick m.mukuna Adolphe m.Kilembe Department of Anesthesiology and Reanimation University of Kinshasa HospitalKinshasaThe Democratic Republic of the Congo Division of Nephrology Department of Internal MedicineUniversity of Kinshasa HospitalKinshasaThe Democratic Republic of the Congo Department of Epidemiology&Biostatistics Kinshasa School of Public HealthUniversity of Kinshasa School of MedicineKinshasaThe Democratic Republic of the Congo Centre medical cite des Aveugles KinshasaThe Democratic Republic of the Congo

BACKGROUND AND AIm: Although admission hyperglycemia has been reported to be associated with unfavorable outcomes in acute stroke, little is known about this association in sub-Saharan Africa. Therefore, the aim of the present study was to assess the prognostic significance of admission hyperglycemia in the acute phase of stroke in Congolese patients. mETHODS: In a multicenter prospective cohort study, consecutive patients with acute stroke were examined in 5 Emergency Rooms or Intensive Care Units of Kinshasa between July 15th, 2017 and march 15th, 2018. The severity of stroke was assessed at admission using the Glasgow Coma Scale. Stress hyperglycemia was defined as random blood glucose levels at admission > 140 mg/dL in patients without known type 2 diabetes mellitus (T2Dm). The endpoint was 10-day all-cause in-hospital mortality. Survival (time-to-death) curves were built using the Kaplan meier methods. Cox proportional analysis was used to identify predictors of 10-day all-cause in-hospital mortality. The predictive performance of blood glucose level to predict 10-day all-cause in-hospital mortality was assessed using ROC curve analysis. RESULTS: Out of 194 patients (mean age 58.7 ± 13.1 years;64% males, 74.7% light to moderate stroke severity;63.4% ischemic stroke) enrolled, 106 (54.6%) had admission hyperglycemia with 77 (72.6%) having stress hyperglycemia. Ninety four deaths (48.5%);mortality rate of 6 deaths per 100 person-days (95%CI 2.7 - 9.3) occurred during a median follow up time 6 (5 - 7) days equivalent to 1542 person-days. Independent predictors of 10-day all-cause in-hospital mortality were admission hyperglycemia regardless of diabetes status (aHR 3.77;95%CI 1.92 - 7.42;p mechanical ventilation (aHR 1.97;95%CI 1.05 - 3.70;p = 0.034). Blood glucose concentrations (AUC 0.743;95%CI 0.672 - 0.814) had a better predictive performance for 10-day all-cause in-hospital mortality with an optimal value of 154 m

关键词： Admission Hyperglycemia Stroke Prognostic Significance Black Africans

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Characterization of Congolese Strains of Xanthomonas axonopodispv. manihotisAssociated with Cassava Bacterial Blight

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American Journal of Plant Sciences 2014年第9期5卷 1191-1201页

作者： G. mamba-mbayi P. Tshilenge-Djim K. K. Nkongolo A. Kalonji-mbuyi Department of Biology Faculty of Sciences & Engineering Laurentian University Sudbury Canada Unit of Phytopathology Faculty of Agronomy University of Kinshasa Kinshasa DR-Congo

Cassava bacterial blight (CBB) caused by Xanthomonas axonopodis pv. manihotis has been reported in several African countries since 1970. Knowledge of the virulence and diversity of Xanthomonas axonopodis pv. manihotis strains is important for an integrated control of CBB. The main objective of the present study was to characterize strains of Xanthomonas axonopodis collected from various regions in the DR-Congo. There was variability among strains for shape (form), contour (margin) and elevation. Bacterial cell size for the strains analyzed varied from 24.1 μm × 11.3 μm to 11.4 μm × 4.2 μm. All the Xanthomonas axonopodis pv. manihotis strains but one was motile. Two distinctive groups were identified based on radial growth of their colonies. The first group grows faster (7.8-10.5 mm/d) compared to the second group (4.8-6.9 mm/d). Five strains (Gandajika, Inera/Stat, Kansasa, mulumba and musakatshi) were classified as virulent with a damage rating ≤ 1 and four were aggressive (Luputa, m'vuazi, Boketa and Kiyaka) with a damage rating > 1. Significant differences were also observed among strains for disease onset, incidence and plant mortality. The highest incidence (33%) of bacterial blight 21 days after infestation (DAI) resulted from the Boketa strain inoculation and the lowest (0 % disease incidence) from INERA/STAT and musakatshi strains. There was no clear association between geographic origin of the strains and their aggressiveness.

关键词： Cassava Bacterial Blight (CBB) Xanthomonas axonopodis pv. manihotis morphological and Physiological Characters CBB Incidence Strains Aggressiveness DR-Congo

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Effect of Gamma Irradiation on morpho-Agronomic Characteristics of Soybeans (Glycine maxL.)

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American Journal of Plant Sciences 2012年第3期3卷 331-337页

作者： Justin mudibu Kabwe K. C. Nkongolo Adrien Kalonji-mbuyi Roger V. Kizungu Department of Biological Sciences Laurentian University Sudbury Canada Faculty of Agronomy University of Kinshasa Kinshasa DR-Congo

mutation breeding in crop plants is an effective approach in improvement of crop having narrow genetic base such as soybean. The main objective of the present study is to determine the effect of different doses of gamma irradiation on different morpho-agronomic characteristics. Agronomic traits that were analyzed included;grain yield, number of pods/plant, number of seeds/plant and weight of 100 seeds and numbers of days to 50% flowering. morphometric characterization of the descriptive data included plant height, stem diameter, number of leaves/plant, leaflet length, leaflet width, number of ramifications/plant, and pod length and width at 3 lodge stage. The results of the present study revealed that the two gamma irradiation doses used (0.2 kGy and 0.4 kGy) decreased significantly most of agronomic and morphological traits evaluated in m1 populations. Different effects of 0.2 kGy and 0.4 kGy irradiation were observed in m2 populations with significant increase of grain yields and yield components in all the three soybean varieties. In general, a significant decrease or no changes of morphological traits were observed for the two irradiation doses in m2 populations. The levels of changes varied among varieties. Potential high yielding mutants were identified in progenies of irradiated seeds.

关键词： Gamma Irradiation Glycine max DR-Congo Genetic Variation Crop Yield

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Towards Understanding of Light-Induced Degradation in α-Si:H Solar Cells

Towards Understanding of Light-Induced Degradation in α-Si:...

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第十五届国际光伏科学与工程大会

作者： m.Zeman V.Náda■dy J.W.metselaar Delft University of Technology P.O.Box 5053 2600 GB Delft The Netherlands Institute of Physics SAS Dúbravská cesta 9 845 11 Bratislava Slovakia Delft University of Technology P.O.Box 5053 2600 GB Delft The Netherlands

＜正＞ From matching the measured and simulated quantum efficiency of light-soaked single-junction α-Si:H solar cells the change in the spatial defect-state density profile in the intrinsic layer was extracted. The simulation results indicate that the largest increase in the density of states due to light soaking takes place at the p/i interface and affects mainly the neutral defect states around midgap. This result is in agreement with the charge deep-level transient spectroscopy experiments on the evolution of the programmed defect-state distributions in intrinsic α-Si:H which show that light exposure significantly modifies the p-type defect-state distribution that evolves into a broad distribution of states with a dominant peak of the neutral states around midgap.

关键词： a-Si:H Solar Cells Degradation modeling

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Regulation of T-type Ca2+ channels in sensory neurons by inflammatory mediators

Regulation of T-type Ca2+ channels in sensory neurons by inf...

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中国神经科学学会第十届全国学术会议

作者： dy Huang HL Zhang N Gamper Department of Phamacology Hebei Medical University

T-type calcium channels(Cav3.1,Cav3.2 and Cav3.3) make one of the families of the voltage-gated calcium channels(VGCC).T-type channels are distinct from other VGCC types in that they are activated at very negative voltages(activation threshold near-60 mV) Thus,in excitable cells T-type channel activity contributes to the control of excitability by setting up an action potential firing *** evidence indicates that the T-type calcium channels are expressed in the receptive fields of peripheral sensory neurons,suggesting that they may play an important role in *** until now the mechanism of the regulation of the T-type calcium channels are still largely *** investigated regulation of T-type Ca channels by inflammatory *** application of bradykinin(200 nm) did not significantly affected the amplitude of currents though Cav3.2 heterologousely erexpressed in HEK293 cells,but induced a leftward shift the channel voltage *** inflammatory mediator,substance P(10 um) acutely inhibited CaV3.2 current in HEK293 cells and the native T-type Ca current in cultured DRG neurons by 30.2%±6.8%(n = 11,Pmpletely reversed by the application of reducing agent DTT(1mm) suggesting that SP effect on T-type channels is mediated by the oxidative *** support of this conclusion substitution of redox sensitive histidine at the position 191 in Cav3.2 by glutamine completely abohshed SP-induced *** further experiments we found that pretreatment of cultured rat DRG neurons with a cocktail of inflammatory mediators(bradykinin,50 nm;ATP,2 um;prostaglandin E2,0.5 μm;norepinephrine,0.5 μm) overnight strongly increased the T-type Ca current density(from 64.1±7.4 pA to 105.6 ± 16.5 pA,n=28 and n = 37,Pm 28/63 to 37/63).Our results put forward ne

关键词： T-type Ca2+ channel Substance P bradykinin inflammation sensory neuron

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monitoring of Atmospheric Pollutant Concentrations in the City of Dakar, Senegal

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Open Journal of Air Pollution 2021年第1期10卷 18-30页

作者： Baïdy Sow Bertrand Tchanche Ibrahima Fall Saliou Souaré Aminata mbow-Diokhané Department of Physics Alioune Diop University Bambey Senegal Centre de Gestion de la Qualité de l’Air (CGQA) Dakar Senegal

The lack of data on air quality monitoring and neglected and overlooked pollutant emissions in the transportation and industrial sectors are motives for the government of Senegal to set up, in 2009, an air quality management center, the CGQA (Centre de Gestion de la Qualité de l’Air). Air quality monitoring at CGQA deals with mainly six pollutants: carbon monoxide (CO), nitrogen oxides (NOx) (with nitrogen dioxide (NO2) and nitrogen monoxide (NO)), sulfur dioxide (SO2), ground-level ozone (O3), Benzene-Toluene-Xylenes (BTX), and particulate matters (PM) with diameters less than 10 μm (PM10) and 2.5 μm (PM2.5). The concentration levels of gaseous pollutants (CO, O3, NO2 and SO2) in the city generally remain below the limit value set by the WHO (World Health Organization). However, particulate matters (PM10 and PM

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小鼠胚胎后肾移植的胚龄选择

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中国组织工程研究 2007年第4期11卷 610-612+801页

作者：臧东钰李晓明郭敏锦州医学院第一附属医院胸外科锦州医学院组织胚胎学教研室

目的:观察小鼠不同胚龄的后肾植入同种异体远交系成年宿主体内后的生长变化,分析小鼠胚胎后肾移植的胚龄选择、血管起源。方法:实验于2003-06/2004-06在锦州医学院组织与胚胎学教研室完成。实验选用普通级昆明系小白鼠24只,同笼饲养。... 详细信息

目的:观察小鼠不同胚龄的后肾植入同种异体远交系成年宿主体内后的生长变化,分析小鼠胚胎后肾移植的胚龄选择、血管起源。方法:实验于2003-06/2004-06在锦州医学院组织与胚胎学教研室完成。实验选用普通级昆明系小白鼠24只,同笼饲养。以观察到阴道栓脱落的最早时间计为胚龄0d,以观察到仔鼠出生的最早时间计为生后0d。以随机数字表法取胚龄13,14,16d的胎鼠及生后1d的仔鼠,即胚龄13d组、胚龄14d组、胚龄16d组、生后1d组,每组8只。受体动物选择普通级体质量20g～25g的成年健康雄性小白鼠32只。对胚龄13d的小鼠胚胎离体后肾4只进行组织培养,观察10d后肾小体的发育情况。选择胚龄13,14,16d及生后1d的小鼠后肾植入同种远交系成年宿主大网膜内10d后,采用光镜及电镜技术观察后肾脏各部(特别是肾小体)的发育情况。结果:各组进行实验的后肾及宿主小白鼠32只均进入结果分析。①胚龄13d的小鼠肾脏中无成熟的肾小体,此胚龄的离体后肾经组织培养和移植后均可以生长和分化,产生成熟的肾小体。②胚龄14,16d及生后1d的小鼠肾脏中,已出现了成熟肾小体,后肾移植后则出现了排斥反应,间质水肿、出血区及淋巴细胞浸润,肾小体萎缩,甚至完全被纤维组织所取代;且排斥反应强弱与胚龄有关,胚龄越大,排斥反应越强。③培养前的后肾结构与移植前胚龄13d小鼠胚胎的后肾结构相同;培养10d后,可见出现了发育中各个阶段肾小体,电镜下可见血管球结构完整。结论:在供体后肾肾小体出现之前移植,其排斥反应轻微,生长发育良好,表明血管球形成之前是移植的最佳时间。

关键词：肾移植肾移植/方法小鼠胚胎

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