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Comparative studies on Y(Ⅲ)a.d dy(Ⅲ)extraction from hydrochloric a.d nitric acids by Cyanex 572 as a novel extractant

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Journal of Rare Earths 2018年第12期36卷 1342-1350页

作者： N.E.el-Hefny M.S.Gasser Sh.Sh.Emam W.H.ma.moud H.F.Aly Hot Laboratories Centre Atomic Energy Authority Faculty of Science Ain Shams University

Extraction of Y(III) a.d dy(III) from hydrochloric a.d nitric acids by Cy-572 in kerosene was studied. The factors affecting the extraction were separately investigated. The stoichiometry of the extracted species was deduced on the basis of slope analysis method. Evaluation of extraction equilibrium a.d stripping investigation was studied as well as saponification effect of Cy-572. The composition of the extracted metal species in the organic phase was found to be [ma·(ha)] for Y(III) or dy(III) in both media.1.0 mol/L HCI is the best stripping agent for each metal ion from the studied acidic media in one *** Cy-572 does not exhibit any selectivity towa.ds the extraction of Y(III) or dy(III) from both HCI a.d HNOsolutions. Based on the obtained results, the data were compared a.d the separation feasibility between lanthanides a.d Y(III) in the two media was discussed.

关键词： Extraction Cyanex-572 Yttrium Lanthanides Separation factor Saponification

Influence of floc dynamic protection layer on alleviating ultrafiltration membrane fouling induced by humic substances

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Journal of Environmental Sciences 2020年第4期32卷 10-19页

作者： Baiwen ma Siqi Wu Bodong Wang Zenglu Qi Yaohui Bai Huijuan Liu Jiuhui Qu Ruijun Wu Key Laboratory of drinking Water Science a.d Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing100085China University of Chinese Academy of Sciences Beijing100049China School of Environmental a.d Municipal Engineering Xi’an University of Architecture and TechnologyXi'an710055China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution ControlTsinghua UniversityBeijing100084China Research Center for Water Quality a.d Ecology Tsinghua UniversityBeijing100084China State Key Laboratory of Membrane materials a.d Membrane Applications Tianjin Motimo Membrane Technology Co.Ltd.Tianjin300457China

Cake layer formation is inevitable over time for ultrafiltration(UF)membrane-based drinking water *** the cake layer is always considered to cause membrane fouling,it can also act as a.dynamic protection layer",as it further adsorbs pollutants a.d dramatically reduces their chance of getting to the membrane ***,the UF membrane fouling performance was investigated with pre-deposited loose flocs in the presence of humic acid(ha).The results showed that the floc dynamic protection layer played an important role in removing *** higher the solution pH,the more negative the floc charge,resulting in lower ha removal efficiency due to the electrostatic repulsion a.d large pore size of the floc *** decreasing solution pH,a positively charged floc dynamic protection layer was formed,a.d more ha molecules were *** potential reasons were ascribed to the smaller floc size,greater positive charge,a.d higher roughness of the floc ***,similar membrane fouling performance was also observed for the negative a.d positive floc dynamic protection layers due to their strong looseness *** a.dition,the molecular weight(MW)distribution of ha also played an important role in UF membrane fouling *** the small MW ha molecules,the chance of forming a loose cake layer was high with a negatively charged floc dynamic protection layer,while for the large MW ha molecules it was high with a positively charged floc dynamic protection *** a result,slight UF membrane fouling was induced.

关键词： Ultrafiltration Floc dynamic protection layer Humic substances Fouling alleviation

3d Printing of Cell-Container-Like Scaffolds for Multicell Tissue Engineering

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Engineering 2020年第11期6卷 1276-1284页

作者： Xiaoya Wang Meng Zhang Jingge ma Mengchi Xu Jiang Chang Michael Gelinsky Chengtie Wu State Key Laboratory of High Performance Ceramics a.d Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of materials Science a.d Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Center for Translational Bone Joint and Soft Tissue Research.University Hospital Carl Gustav Carus&Faculty of MedicineTechnische Universitat DresdenDresden 01307Germany

The development of an engineered non-contact multicellular coculture model that can mimic the in v iv o cell microenvironment of human tissues remains *** this study,we successfully fabricated a cell-container-like scaffold composed of p-tricalcium phosphate/hydroxyapatite(p-TCP/ha)bioceramic that contains four different pore structures,including triangles,squares,parallelograms,a.d rectangles,by means of three-dimensional(3d)printing *** scaffolds can be used to simultaneously culture four types of cells in a non-contact *** engineered 3d coculture model composed of human bone-marrow-derived mesenchymal stem cells(HBMSCs),human umbilical vein endothelial cells(HUVECs),human umbilical vein smooth muscle cells(HUVSMCs),a.d human dermal fibroblasts(HdFs)with a spatially controlled distribution was constructed to investigate the individual or synergistic effects of these cells in osteogenesis a.d *** results showed that three or four kinds of cells cocultured in 3d cell containers exhibited a higher cell proliferation rate in comparison with that of a single cell *** studies into the cell-cell interactions between HBMSCs a.d HUVECs revealed that the 3d cell containers with four separate spatial structures enhanced the angiogenesis a.d osteogenesis of cells by amplifying the paracrine effect of the cocultured ***,the establishment of multicellular non-contact systems including three types of cells a.d four types of cells,respectively,cocultured in 3d cell containers demonstrated obvious advantages in enhancing osteogenic a.d angiogenic differentiation in comparison with monoculture modes a.d two-cell coculture *** study offers a new direction for developing a scaffold-based multicellular non-contact coculture system for tissue regeneration.

关键词： 3d cell containers Non-contact multicellular coculture Interactions Angiogenesis Osteogenesis

Study on the structure characterization a.d moisturizing effect of Tremella polysaccharide fermented from GCMCC5.39

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Food Science a.d Human Wellness 2021年第4期10卷 471-479页

作者： Meng Yang Zilong Zhang Yan He Chengliang Li Jinmei Wang Xia ma School of Perfume a.d Aroma Technology Shanghai Institute of TechnologyShanghai 201418China Shanghai International Travel Healthcare Center Shanghai Customs District P.R.ChinaShanghai 200335China Laibo Pharmaceutical Technology(Shanghai)Co.Ltd Shanghai 201418China National R&d Center for Edible Fungus Processing Technology Henan UniversityKaifeng 475004China

The structure a.d moisture retention of Tremella polysaccharide fermented from GCMCC5.39(FTP)were *** UV,infrared spectrum analysis,HPAEC-PAd,HPSEC a.d 1 d NMR analysis,the composition of the purifi ed FTP was *** ed components of fermented Tremella polysaccharide(FTPS)was made of galactose,mannose,glucose,galactosmine,glucosamine,a.d contain a large amount of hydroxyl,carbonyl a.d amino *** wasα-neutral pyranose without uronic ***-1 a.d FTPS-2 were obtained after purifi cation by dEAE-Sepharose Fast Flow *** molecular weights of FTPS-1 a.d FTPS-2 were 25722 a.d 177263 ***-2 had a better ability to prevent moisture loss,a.d the optimal moisture retention period was 0–4 ***-2 could signifi cantly increase the moisture content of the skin epidermis a.d showed a.dose-concentration *** effect of FTPS-2 on the expression of different moisturizing genes was evaluated in a human skin keratinocyte *** results showed that FTPS-2 has no cytotoxicity,a.d could signifi cantly promote AQP3,TGM1,CASP14,HYAL2,FLG gene expression level in haCaT *** has the most signifi cant infl uence at HYAL2 protein expression on 50μg/mL.

关键词： Polysaccharide Tremella spp. Structure identifi cation Moisturizing

模拟CO2浓度升高对宁夏枸杞营养生长与果实品质的影响

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林业科学 2019年第6期55卷 28-36页

作者：哈蓉马亚平曹兵郭芳芸宋丽华宁夏大学农学院

【目的】研究宁夏枸杞对大气CO2浓度升高的生理生态响应机制,为探究枸杞及其他木本经济林植物在气候变化背景下优质高效栽培与育种提供理论依据。【方法】以‘宁杞1号’扦插苗为材料,采用开顶气室(open-top chamber,OTC)及自动监控系统... 详细信息

【目的】研究宁夏枸杞对大气CO2浓度升高的生理生态响应机制,为探究枸杞及其他木本经济林植物在气候变化背景下优质高效栽培与育种提供理论依据。【方法】以‘宁杞1号’扦插苗为材料,采用开顶气室(open-top chamber,OTC)及自动监控系统模拟控制CO2浓度,测定宁夏枸杞在升高CO2浓度环境下植株营养生长指标与果实糖分含量、主要活性物质含量和蔗糖代谢相关酶活性的变化。【结果】 1) CO2浓度升高,促进宁夏枸杞植株生长发育,苗高增长量较对照分别高11.67%和18.65%,地径分别高55.09%和62.58%,新梢加长和加粗生长均呈增加趋势。2) 2种CO2浓度升高处理下,宁夏枸杞果实横径较对照分别增加4.56%和7.71%,单果质量分别增加15.05%和34.53%,果实更加饱满。3) CO2浓度升高处理下,夏果(处理90天左右)果实中果糖含量较对照略高,秋果(处理120天后)含量比对照分别低1.39%和3.98%。试验处理期间,果实中葡萄糖和总糖含量均低于对照,且CO2浓度升高1倍[(760±20)μmol·mol^-1 ]处理下降最为明显。夏果果实蔗糖含量均低于对照,秋果在CO2浓度升高1倍[(760±20)μmol·mol^-1 ]下较对照略高。4)果实中枸杞多糖含量低于对照,黄酮含量在秋果期比对照分别低16.62%和18.35%,且CO2浓度升高1倍[(760±20)μmol·mol^-1 ]处理对果实活性物质含量影响较大。5) CO2浓度升高增加了酸性转化酶和中性转化酶活性;夏果蔗糖磷酸合成酶较对照明显增加,但秋果酶活性低于对照;蔗糖合成酶分解方向与合成方向酶活性变化趋势相同,夏果均高于对照,秋果酶活性低于对照,CO2浓度升高1倍[(760±20)μmol·mol^-1 ]处理下差异极显著。【结论】长期高CO2浓度处理促进宁夏枸杞植株营养生长,果实单果质量与纵横径增大,有利于改善果实外观品质;但果实中糖分含量和枸杞多糖、黄酮等生物活性物质的含量明显降低,相关酶活性发生变化,影响果实营养品质。

关键词：宁夏枸杞 CO2浓度升高营养生长枸杞多糖蔗糖代谢相关酶

Sensitivity of X-Ba.d (σ⁰, γ) a.d Optical (NdVI) Satellite data to Corn Biophysical Parameters

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Advances in Remote Sensing 2016年第2期5卷 103-117页

作者： Frédéric Baup Lucio Villa Rémy Fieuzal maël Ameline Centre d’Etudes de la BIOsphère (CESBIO) Université de Toulouse CNES/CNRS/IRD/UPS Toulouse France Asociación para la Investigación y el desarrollo Integral (a.dER) Lima Perú

The objective of this work was to evaluate the sensitivity of three different satellite signals (interferometric coherence (γ), backscattering coefficient (σ0) a.d NdVI) to corn biophysical parameters (leaf area index, height, biomass a.d water content) throughout its entire vegetation cycle. All of the satellite a.d in situ data were collected during the Multi-spectral Crop Monitoring (MCM’10) experiment conducted in 2010 by the CESBIO Laboratory over eight different agricultural sites located in southwestern France. The results demonstrated that the NdVI is well adapted for leaf area index monitoring, whereas γ27.3° is much more suited to the estimation of the three other Biophysical Parameters throughout the entire crop cycle, with a coefficient of determination ranging from 0.83 to 0.99, using non-linear relationships. Moreover, contrary to the use of the NdVI or backscattering coefficients, the use of coherence exhibited a low sensitivity to the changes in vegetation a.d soil moisture occurring during senescence, offering interesting perspectives in the domain of applied remote sensing

关键词： Corn Biophysical Parameters Interferometric Coherence Backscattering Coefficients NdVI

Small-animal PET demonstrates brain metabolic change after using bevacizumab in a rat model of cerebral ischemic injury

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Neuroscience Bulletin 2014年第5期30卷 838-844页

作者： Ying dong Fahuan Song Jianjuan ma Xuexin He Sa.d Amer Weizhong Gu Mei Tian department of Oncology department of Nuclear Medicine The Second Affiliated Hospital of Zhejiang University School of Medicine Zhejiang University Medical PET Center Institute of Nuclear Medicine a.d Molecular Imaging of Zhejiang University Key Laboratory of Medical Molecular Imaging of Zhejiang Province department of Zoology Faculty of ScienceKafr El Sheikh University department of Pathology The Children's Hospital of Zhejiang University School of Medicine

ABSTRACT To evaluate the effect of bevacizumab on cerebral ischemia, we used 2-deoxy-2-18F-fluoro-d-glucose （18F-FdG） small-animal positron emission tomography （PET） in the middle cerebral artery occlusion （MCAO） rat model. After baseline neurologic function tests a.d PET studies, MCAO Sprague-dawley rats received bevacizumab or normal saline （controls）. Weekly PET imaging a.d neurologic function tests showed that the 18F-FdG accumulation in the bevacizumab group was similar to that in the controls during the first 2 weeks, but lower than in controls at weeks 3 a.d 4. However, no difference was found in neurological scores between the groups. The number of von Willebra.d factor-positive cells in the bevacizumab group was lower than that in controls. The expression of vascular endothelial growth factor was higher than in controls at week 4. These results suggested that bevacizumab does not influence functional recovery in this model of cerebral ischemia.during a 4-week period, but inhibits vascular formation a.d metabolic recovery, which may be considered in cancer patients with a recent ischemic stroke.

关键词： cerebral ischemia bevacizumab positron emission tomography cancer

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基于g_λ变量的冗余优化模型

模糊系统与数学 2017年第1期31卷 128-135页

作者：张鸿马丽涛哈明虎河北工程大学水电学院河北邯郸056038 河北工程大学数理科学与工程学院河北邯郸056038

为了解决Sugeno测度空间上系统寿命期望值、系统寿命的α乐观值和系统可靠性的系统性能优化问题,提出用g_λ变量来表征冗余元件寿命的冗余优化模型。首先,建立Sugeno冗余期望值模型、Sugeno冗余机会约束规划模型和Sugeno冗余相关机会规... 详细信息

为了解决Sugeno测度空间上系统寿命期望值、系统寿命的α乐观值和系统可靠性的系统性能优化问题,提出用g_λ变量来表征冗余元件寿命的冗余优化模型。首先,建立Sugeno冗余期望值模型、Sugeno冗余机会约束规划模型和Sugeno冗余相关机会规划模型;其次,为了求解模型,设计一种基于Sugeno模拟、多层神经网络和遗传算法的混合智能算法;最后,通过桥式系统的系统性能优化的算例验证所提模型和算法的可行性。

关键词： gλ变量 Sugeno测度空间冗余优化 Sugeno模拟混合智能算法

Population dynamics of Colonizing Fauna a.d Its Effect on Growth Rates of the Farmed Red Alga Alsidium triquetrum (S. G. Gmelin) Trevisan

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Natural Science 2022年第2期14卷 42-55页

作者： Ruben Cabrera Arsenio J. Areces Jhoana.díaz-Larrea Sunil Kumar Sahu Juan Rica.do Cruz-Aviña Laura G. Nuñez García Gabinete de Arqueología Oficina del Historiador de la Ciudad Habana Vieja Cuba Instituto de Geografía Tropical Ministerio de Ciencia Tecnología y Medio Ambiente Municipio Playa Ciudad Habana Cuba departamento de Hidrobiología Universidad Autónoma Metropolitana Unidad Iztapalapa CBS Cd de México México State Key Laboratory of Biocontrol Guangdong Key Laboratory of Plant Resources School of Life Science Sun Yat-Sen University Guangzhou China Facultad de Medicina Veterinaria y Zootecnia BUAP Laboratorio de Medicina de la Conservación Licenciatura en Medicina Veterinaria y Fauna Silvestre Km. 7.5 Carretera Ca&ntilde ada Morelos El Salado Tecamachalco Puebla Mexico

Herbivores can drastically alter the morphology of macroalgae by directly consuming tissue a.d by inflicting structural wounds. macroalgae host abundant a.d diverse epibiont communities, the dynamics of which tend to be mostly unknown in space a.d time. As the cultivation of macroalgae gains momentum worldwide, it is key to measure how epibionts could affect algal performance. We examined the epibiont community associated with farmed Alsidium triquetrum, a red macroalga with growing pharmacological interest. Measurements were conducted over two independent 60-day periods, one in summer a.d one in winter. Epibionts showed different patterns of succession in both seasons. Crustaceans, mainly amphipods, showed the highest overall density, with deleterious effects on daily growth rates of A. triquetrum in winter. Adverse effects as a function of epibionts were not detected in summer. A. triquetrum is a perennial alga. However, its performance as a crop in the nearshore can be significantly affected by the epibiont community structure that persists in winter. Amphipods a.d ascoglossan molluscs were risk factors in the mariculture of this agarophyte. In winter, they can destroy plants when they reach more than five individuals per gram of fresh biomass. Results highlight that commercial farming of A. triquetrum would be successful if grown throughout the summer.

关键词： Cultivation Epifauna macroalgae macroinvertebrates Seaweed mariculture