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Response of Soil Microbial Properties to long-Term Application of Organic and Inorganic Amendments in a Tropical Soil (saria, Burkina Faso)

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Open Journal of Soil Science 2016年第2期6卷 21-33页

作者： Ndeye Hélène Diallo-Diagne komi Assigbetse saïdou sall Dominique Masse Moussa Bonzi Ibrahima Ndoye Jean luc Chotte ISRA LEMSAT Centre IRD-ISRA Bel Air Dakar Sénégal Virginia Tech Crop and Soil Environmental Sciences Blacksburg USA IRD UMR Eco & Sols LEMSAT Centre IRD-ISRA Bel Air Dakar Sénégal IRD UMR Eco & Sols IRD Montpellier France UGB UFR S2ATA Saint Louis Sénégal INERA Ouagadougou Burkina Faso UCAD Dakar Sénégal

Soil microbial biomass carbon (MBC), β-glucosidase, acid phosphatase and fluorescein diacetate (FDA) activities and bacterial community structure were assessed in a long-term (26 years) experiment, at physiological stages of sorghum growth, comparing different management methods for organic (manure, straw residues) and inorganic (urea) amendments at the INERA field station in saria (Burkina Faso). Annual application of manure led to the highest soil microbial biomass and enzyme activities. Investigations indicated that only microbial biomass and β-glucosidase activities were affected during the cropping season. Phosphatase and FDA enzyme activities did not depend on the crop development stages. The application of N fertilizer modified phosphatase and FDA enzyme activities, the activities being higher in soils amended with N fertilizer. The bacterial community structure was analyzed by PCR-denaturing gradient gel electrophoresis (PCR-DGGE) targeting the eubacterial 16S rRNA gene. Cluster analysis of PCR-DGGE patterns showed two major clusters, the first containing the mineral fertilization and straw treatments and the second, the straw + urea, manure and manure + urea treatments. Sorghum grain yields were the highest for manure treatments. In this long-term experiment, applying straw did not produce a better grain yield than that obtained in the un-amended plot.

关键词： Organic Amendments Mineral Fertilizer Microbial Biomass Soil Enzyme Activities PCR-DGGE Crop Development Stages lixisol

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Recycled, Bio-Based, and Blended Composite Materials for 3D Printing Filament: Pros and Cons—A Review

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Materials Sciences and Applications 2023年第3期14卷 148-185页

作者： khanh Q. Nguyen Pascal Y. Vuillaume lei Hu Jorge lópez-Beceiro Patrice Cousin saïd Elkoun Mathieu Robert Department of Civil & Building Engineering University of Sherbrooke Sherbrooke Canada COAlIA Thetford Mines Canada Centre for Research in Naval and Industrial Technologies (CITENI) Ferrol Industrial Campus University of A Coru&ntildea Ferrol Spain Department of Mechanical Engineering University of Sherbrooke Sherbrooke Canada

In recent years, additive manufacturing (AM), known as “3D printing”, has experienced exceptional growth thanks to the development of mechatronics and materials science. Fused filament deposition (FDM) manufacturing is the most widely used technique in the field of AM, due to low operating and material costs. However, the materials commonly used for this technology are virgin thermoplastics. It is worth noting a considerable amount of waste exists due to failed print and disposable prototypes. In this regard, using green and sustainable materials is essential to limit the impact on the environment. The recycled, bio-based, and blended recycled materials are therefore a potential approach for 3D printing. In contrast, the lack of understanding of the mechanism of interlayer adhesion and the degradation of materials for FDM printing has posed a major challenge for these green materials. This paper provides an overview of the FDM technique and material requirements for 3D printing filaments. The main objective is to highlight the advantages and disadvantages of using recycled, bio-based, and blended materials based on thermoplastics for 3D printing filaments. In this work, solutions to improve the mechanical properties of 3D printing parts before, during, and after the printing process are pointed out. This paper provides an overview on choosing which materials and solutions depend on the specific application purposes. Moreover, research gaps and opportunities are mentioned in the discussion and conclusions sections of this study.

关键词： Additive Manufacturing 3D Printing Fused Filament Deposition (FDM) Manufacturing Recycled Bio-Based Blended Materials Interlayer

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Ni(OH)_2和NiO电极材料的原位制备与性能的研究

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化学研究与应用 2013年第8期25卷 1185-1188页

作者：吕卅王超杨小天吉林建筑工程学院智能建筑系统集成与节能控制重点实验室吉林长春130118

采用原位水热生长法在泡沫镍基底上制备了β-Ni(OH)2纳米盘并通过煅烧获得NiO,均可以直接作为工作电极。利用XRD和SEM对样品进行了表征,并进行了电化学性能测试,结果表明我们所制备的Ni(OH)2电极在2 M kOH溶液中2.5 A/g的放电电流密度下... 详细信息

采用原位水热生长法在泡沫镍基底上制备了β-Ni(OH)2纳米盘并通过煅烧获得NiO,均可以直接作为工作电极。利用XRD和SEM对样品进行了表征,并进行了电化学性能测试,结果表明我们所制备的Ni(OH)2电极在2 M kOH溶液中2.5 A/g的放电电流密度下,比容量达1495 F/g,通过煅烧得到的NiO,同样可以作为电极材料。

关键词： Ni(OH)2 NiO 纳米结构电极材料

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Study of Corrosion Resistance of laser Welded Au-Pd-Ag-In Alloy Using Electrochemical Techniques

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Materials Sciences and Applications 2011年第7期2卷 711-715页

作者： Márcio l. Dos santos Heloísa A. Acciari Carla S. Riccardi Antonio C. Guastaldi 不详

The aim of this work was to evaluate the corrosion resistance of AuPdAgIn alloy, submitted to laser beam welding, in 0.9% NaCl solution, using electrochemical techniques. Measures of the open circuit potential (OCP) versus time were applied to electrochemical experiments, as well as potentiodynamic direct scanning (PDS) and electrochemical impedance spectroscopy (EIS) on AuPdAgIn alloy, submitted to laser beam welding in 0.9% NaCl solution. Some differences observed in the microstructure can explain the results obtained for corrosion potential, Ecorr, and corrosion resistance, Rp. EIS spectra have been characterized by distorted capacitive components, presenting linear impedance at low frequencies, including a non-uniform diffusion. The area of the laser weld presented corrosion potential slightly superior when compared to the one of the base metal. The impedance results suggest the best resistant corrosion behavior for laser weld than base metal region. This welding process is a promising alternative to dental prostheses casting.

关键词： laser Welding Corrosion Au-Pd-Ag-In Electrochemical Techniques

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Expression of B7 costimulation molecules by colorectal cancer cells reduces tumorigenicity and induces anti-tumor immunity

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World Journal of Gastroenterology 1999年第2期5卷 59-63页

作者： HU Jin Yue, WANG sa, ZHU Jian Gao, ZHOU Guo Hua and SUN Qu Bing

AIM To study the tumorigenicity of colorectal cancer cells transfected with B7 gene and the anti-tumor immunity induced by B7 gene modified colorectal cancer *** B7 gene was transfected into mouse colon cancer cell line CMT93. The transfectants were selected in DMEM containing 800 mg/ l G418, and B7 molecules were detected by immunohistochemistry. Experiments in vivo include: ① 5×106 B7+ CMT93 cells were inoculated into the back of C57Bl/ 6 mice subcutaneously to determine their tumorigenicity (n=4). As control, wild type CMT93 cells were inoculated the same as the experimental group (n=3). ② The mice primed by B7+ CMT93 cells whose tumors vanished were rechallenged with wild type CMT93 to observe the immune protection of these mice against the wild type CMT93 (n=4). Non-primed 4 native mice inoculated with wild type CMT93 were used as control. With in vitro cytotoxicity assay, the mice were immunized with B7+ CMT93 or the wild type CMT93 by intraperitoneal injection (n=4×2). The spleen cells and the abdominal cavity infiltrating lymphocytes were obtained and cultured for two days. Cytotoxicity of these cells against the B7 gene modified or wild type CMT93 was detected by MTT *** B7 high expression clones were obtained after the transfection of the B7 gene into CMT93 cells by electroporation. Immunohistochemistry results showed mainly membrance staining and partly cytoplasm staining in B7 gene transfected CMT93 cells. In vivo experiments: ① After the inoculation of the B7+ CMT93 cells into the back of C57Bl/ 6 mice, they lost their tumorigenicity greatly (P＜0.01). All the small tumors growing in the early period in the experimental group vanished in one month, and the tumors in control group grew progressively. ② No tumors were found in all 4 mice primed by B7+ CMT93 cells after they were rechallenged with wild type CMT93. In the control group all mice had grown tumors (P＜0.05). In vitro cytotoxicity assay, the CTls induced by B7+ CMT93 had a hig

关键词： colorectal neoplasms B7 gene gene expression immunohistochemistry

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中国岩黄芪属(豆科)植物资料增补

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西北植物学报 2006年第6期26卷 1256-1258页

作者：萨仁中国科学院植物研究所系统与进化植物学国家重点实验室北京100093

根据对标本的研究及文献资料的整理,证实了西伯利亚岩黄芪在中国的分布;山竹岩黄芪在新疆的分布新记录。另外,还报道了地中海岩黄芪在陕西的栽培记录。

关键词：中国岩黄芪属增补

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Evaluation of Antifertility Effect and Recovery of the Seed Oil Constituents of Iranian Species of Melia Azadrach l. in Male Rats

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Journal of Reproduction and Contraception 2008年第3期19卷 161-166页

作者： Parandin R sadeghipour HR Haeri Rohani sa Department of Biology Faculty of Sciences Payame Noor University Department of Physiology Faculty of Medicine Tehran University Department of Animal Physiology Faculty of Sciences Tehran University

Objective To evaluate the fertility effects of seed extract of Melia azadarach l. treatment effects on fertility indices in male Wistar rats. Methods The seed oil extract had been prepared according to conventional methods. The rats were randomly divided into three study groups. Groups A and B received graded doses of 50 mg/kg and 100 mg/kg body weight of the extract oil, respectively on daily basis for 60 d. Animals in control group received I ml of maize oil. At the end of 60 d and 3 months treatment period, 6 animals per group were randomly selected and fertility was evaluated with mating test. GSI （gonadosomatic index） sperm motility, sperm viability, ESR （epididymal sperm reserves）, DSP（daily sperm production） and testosterone concentration were also assessed.Results In the first stage, a significant reduction infertility indices especially in higher dose was observed compared with the control. During the next stage, the significant increase in fertility indices are the indication of reasonable recovery and reversibility of extract activity. Conclusion The seed oil of Melia azadarach l. has antifertility activity, but its effects is reversible.

关键词： male rats antifertility Melia azadarach l. seed oil

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弹性腔流激耦合共振及声辐射机理研究

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船舶力学 2016年第8期20卷 1036-1044页

作者：高岩沈琪俞孟萨中国船舶科学研究中心船舶振动噪声重点实验室江苏无锡214082 中国船舶科学研究中心江苏省绿色船舶技术重点实验室江苏无锡214082

利用Elder空腔声学模型,分析了典型空腔腔口剪切振荡和刚性壁腔体声模态的频率特征。采用模态法建立了弹性壁腔体模态声阻抗计算模型,并计算分析了腔口剪切振荡与弹性腔体耦合的归一化声辐射函数。研究表明弹性壁提供的附加压缩性,降低... 详细信息

利用Elder空腔声学模型,分析了典型空腔腔口剪切振荡和刚性壁腔体声模态的频率特征。采用模态法建立了弹性壁腔体模态声阻抗计算模型,并计算分析了腔口剪切振荡与弹性腔体耦合的归一化声辐射函数。研究表明弹性壁提供的附加压缩性,降低了空腔模态频率,增大了腔口剪切振荡与空腔模态耦合共振及强声辐射的可能性,并由试验验证了计算结果。

关键词：空腔剪切振荡腔体声模态耦合共振声辐射

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基于电子鼻技术的烟丝受虫害前后挥发性成分差异分析

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湖北农业科学 2024年第7期63卷 165-170页

作者：史姜维王潇洒刘普明匡映杨苡晨刘梦龙张楚安湖北中烟工业有限责任公司武汉430040 湖北工业大学生命科学与健康工程学院武汉430068

针对烟草(Nicotiana tabacum l.)中烟草甲(lasioderma serricorne)检测技术不完善,检测结果不可靠等问题,以电子鼻检测结果为基础,通过主成分分析法(PCA)和loading分析法对数据结果进行分析。结果表明,4种烟丝的主要挥发物质为硫类物质... 详细信息

针对烟草(Nicotiana tabacum l.)中烟草甲(lasioderma serricorne)检测技术不完善,检测结果不可靠等问题,以电子鼻检测结果为基础,通过主成分分析法(PCA)和loading分析法对数据结果进行分析。结果表明,4种烟丝的主要挥发物质为硫类物质、短链烷烃、醇醚醛酮、小分子氮氧化合物等,虫样及性激素的主要挥发性物质是小分子氮氧化合物、硫化物。受虫害后烟丝中硫类化合物明显降低,在对无机硫化物敏感的传感器(W1W)中浓香虫害烟丝的响应值比浓香烟丝下降48.33%,清香虫害烟丝比清香烟丝下降59.48%;在对有机硫化物敏感的传感器(W2W)中浓香虫害烟丝的响应值比浓香烟丝下降35.72%,清香虫害烟丝比清香烟丝下降48.55%。PCA结果显示,4种烟丝样品表现出非常好的区分度,雌虫、雄虫样品在占比高达99.70%的主成分1上几乎没有差别。loading分析结果显示,烟丝样品中气味主要成分为硫类物质,烟草甲虫样气味主要成分是小分子氮氧化物,其次为硫类物质。

关键词：烟草(Nicotiana tabacum l.) 烟丝虫害烟草甲(lasioderma serricorne) 电子鼻挥发性成分

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Novel TINF2 gene mutation in dyskeratosis congenita with extremely short telomeres:A case report

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World Journal of Clinical Cases 2022年第33期10卷 12440-12446页

作者： Verónica Judith Picos-Cárdenas saúl Armando Beltrán-Ontiveros JoséAlfonso Cruz-Ramos JoséAlfredo Contreras-Gutiérrez Eliakym Arámbula-Meraz Carla Angulo-Rojo Alma Marlene Guadrón-llanos Emir Adolfo leal-león Dora María Cedano-Prieto Juan Pablo Meza-Espinoza laboratorio de Genética Facultad de MedicinaUniversidad Autónoma de SinaloaCuliacán 80018SinaloaMexico Centro de Investigación y Docencia en Ciencias de la salud Hospital Civil de CuliacánUniversidad Autónoma de SinaloaCuliacán 80030SinaloaMexico Departamento de Clínicas Médicas Centro Universitario de Ciencias de la SaludUniversidad de GuadalajaraGuadalajara 44340JaliscoMexico Facultad de Medicina Universidad Autónoma de SinaloaCuliacán 80018SinaloaMexico laboratorio de Genética y Biología Molecular Facultad de Ciencias Químico-BiológicasUniversidad Autónoma de SinaloaCuliacán 80010SinaloaMexico laboratorio de Neurociencias Facultad de MedicinaUniversidad Autónoma de SinaloaCuliacán 80018SinaloaMexico laboratorio de Diabetes y Comorbilidades Facultad de MedicinaUniversidad Autónoma de SinaloaCuliacán 80018SinaloaMexico Facultad de Medicina Universidad Autónoma de TamaulipasMatamoros 87349TamaulipasMexico

BACkGROUND Dyskeratosis congenita is a rare disease characterized by bone marrow failure and a clinical triad of oral leukoplakia,nail dystrophy,and abnormal skin *** genetics of dyskeratosis congenita include mutations in genes involved in telomere maintenance,including *** SUMMARY Here,we report a female patient who presented thrombocytopenia,anemia,reticulate hyperpigmentation,dystrophy in fingernails and toenails,and leukoplakia on the tongue.A histopathological study of the skin showed dyskeratocytes;however,a bone marrow biopsy revealed normal cell *** patient was diagnosed with dyskeratosis congenita,but her family history did not reveal significant ***-exome sequencing showed a novel heterozygous punctual mutation in exon 6 from the TINF2 gene,namely,NM_001099274.1:-c.854delp.(Val285-Alafs*32).An analysis of telomere length showed short telomeres relative to the patient’s *** The disease in this patient was caused by a germline novel mutation of TINF2 in one of her parents.

关键词： Dyskeratosis congenita TINF2 Germline mutation Novel mutation Short telomeres Case report

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