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spatial distribution of copper content in sediments of the Yangtze River system

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Chinese science Bulletin 1997年第15期42卷 1294-1297页

作者： Zhang, Cs Zhang, s He, JB state Key Laboratory of Resources and Environment Information system China Department of Chemical Geography Institute of Geography Chinese Academy of Sciences Beijing China

THE spatial distribution pattern of an element content is controlled by various geochemical pro-cesses. studies on the spatial pattern are beneficial to further analysis on the factors. As a re-sult, our knowledge about the geochemical processes is enriched. At the same time, describingthe spatial patterns quantitatively with some indices is one way from qualitative to quantitativeanalysis.

关键词： geostatistics variogram Kriging copper.

Canadian children’s and youth’s adherence to the 24-h movement guidelines during the COVID-19 pandemic: A decision tree analysis

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Journal of sport and Health science 2020年第4期9卷 313-321页

作者： Michelle D.Guerrero Leigh M.Vanderloo Ryan E.Rhodes Guy Faulkner sarah A.Moore Mark s.Tremblay Children’s Hospital of Eastern Ontario Research Institute OttawaON K1H 8L1Canada ParticipACTION TorontoON M5S 1M2Canada Child Health and Evaluative sciences Hospital for Sick ChildrenTorontoON M5G 0A4Canada Behavioral Medicine Laboratory School of Exercise SciencePhysical and Health EducationUniversity of VictoriaVictoriaBC V8W 2Y2Canada school of Kinesiology University of British ColumbiaVancouverBC V6T 1Z1Canada Department of Therapeutic Recreation Faculty of ChildFamilyand Community StudiesDouglas CollegeCoquitlamBC V3B 7X3Canada school of Health and Human Performance Dalhousie UniversityHalifaxNS B3H 4R2Canada Department of Pediatrics University of OttawaOttawaON K1H 8L1Canada

Purpose:The purpose of this study was to use decision tree modeling to generate profiles of children and youth who were more and less likely to meet the Canadian 24-h movement guidelines during the coronavirus disease-2019(COVID-19)***:Data for this study were from a nationally representative sample of 1472 Canadian parents(Meanage=45.12,sD=7.55)of children(511 years old)or youth(1217 years old).Data were collected in April 2020 via an online *** items assessed demographic,behavioral,social,micro-environmental,and macro-environmental *** decision trees of adherence and non-adherence to all movement recommendations combined and each individual movement recommendation(physical activity(PA),screen time,and sleep)were ***:Results revealed specific combinations of adherence and non-adherence *** associated with adherence to the recommendation(s)included high parental perceived capability to restrict screen time,annual household income ofCAD 100,000,increases in children’s and youth’s outdoor PA/sport since the COVID-19 outbreak began,being a boy,having parents younger than 43 years old,and small increases in children’s and youth’s sleep duration since the COVID-19 outbreak *** associated with non-adherence to the recommendation(s)included low parental perceived capability to restrict screen time,youth aged 1217 years,decreases in children’s and youth’s outdoor PA/sport since the COVID-19 outbreak began,primary residences located in all provinces except Quebec,low parental perceived capability to support children’s and youth’s sleep and PA,and annual household income ofCAD 99,***:Our results show that specific characteristics interact to contribute to(non)adherence to the movement behavior *** highlight the importance of targeting parents’perceived capability for the promotion of children’s and youth’s movement behaviors during challengin

关键词： Decision tree analysis Parental perceived capability Physical activity screen time sleep

Investigation of stress corro-sion-enhanced plastic deformation using atomic force microscope

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Chinese science Bulletin 2002年第12期47卷 1053-1056页

作者： Liang, s Qiao, LJ Chu, WY Univ sci & Technol Beijing Dept Mat Phys Beijing 100083 Peoples R China

Atomic force microscope (AFM) was used to study in situ the change in slip bands during stress corrosion of brass in the ammonia solution prior to initiation of stress corrosion crack. The result showed that additive slip bands appeared ahead of a loaded notch tip during stress corrosion prior to initiation of stress corrosion crack after the constant deflection specimen was precrept for 48 h and then polished. The average height and spacing of slip bands generated during stress corrosion were about three times less or larger, respectively, than those during loading in air.

关键词： brass stress corrosion atomic force microscope.

Endotoxins in the prostatic secretions of chronic prostatitis patients:a need for further biomarkers through the use of proteomics

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Asian Journal of Andrology 2006年第1期8卷 123-124页

作者： sashi s.Kommu stewart Reiss The Royal Marsden NHs Foundation Trust Fulham RoadLondon SW3 6JJUK Brighton and sussex Medical school University of SussexBrighton BN1 9PXUK

Dear sir,Dai et al.[1] must be commended on their useful investigation of the clinical significance of endotoxins in the expressed prostatic secretions （EPs） of chronic prostatitis （CP） patients. However, we take issue with their conclusion. The conclusion that EPs endotoxin determination is helpful in diagnostic confirmation is plausible,

关键词： Proteomics Bacterial Infections Biological Markers Chronic Disease Endotoxins Humans Male Prostate Prostatitis

Bulk heterojunction thin film formation by single and dual feed ultrasonic spray method for application in organic solar cells

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Journal of semiconductors 2016年第9期37卷 47-50页

作者： D.M.Marathe H.s.Tarkas M.s.Mahajan G.s.Lonkar s.R.Tak J.V.sali Organic Photovoltaic Laboratory North Maharashtra UniversityJalgaon(MS)425001India

We here present a way of preparing the polymer： fullerene BHJ using dual feed method which can lead to formation of pure phases. In this report, we present results of our initial experiments in this *** effect of process parameters on the thickness and surface roughness of the active layer has been *** structural and optical properties have been studied using the optical microscope, UV–visible spectroscopy and photoluminescence spectroscopy. significant PL quenching indicates efficient charge separation in the BHJ formed using this technique. We have also compared the BHJ thin films prepared with this dual feed ultrasonic technique with the single feed spray method. The BHJ formed using this technique has been used as an active layer in OsC.

关键词： P3HT PCBM dual feed ultrasonic spray method organic solar cell

Influence of carbon nano tubes on mechanical, metallurgical and tribological behavior of magnesium nanocomposites

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Journal of Magnesium and Alloys 2017年第3期5卷 326-335页

作者： s.T.selvamani s.Premkumar M.Vigneshwar P.Hariprasath K.Palanikumar Department of Mechanical Engineering Vel Tech Multi Tech Engineering CollegeChennai 600062TamilnaduIndia Department of Mechanical Engineering Vel Tech Dr.RR Dr.SR UniversityChennai 600062TamilnaduIndia Department of Manufacturing Engineering Annamalai UniversityChidambaram 608002TamilnaduIndia Department of Mechanical Engineering Sai Ram Institute of TechnologyChennai 600044TamilnaduIndia

In this research work,three different reinforcements of Carbon Nano Tubes(in weight%)such as 2%,3%and 4%were added to the magnesium AZ91D grade magnesium alloy to fabricate the Nanocomposites through stir casting *** effects of volume percentage on the mechanical,metallurgical and wear behavior were *** composites with 4%reinforcement show high hardness while the composites with 3%reinforcement show better tensile and yield strength and also an improved wear resistance compared to ***,the characterization of the Nanocomposites were made using Optical Microscopy,scanning Electron Microscopy,Finite Element-scanning Electron Microscopy and Transmission Electron Microscopy to understand its nature.

关键词： CNT Magnesium alloy stir casting Wear behavior

EUs for pancreatic cystic neoplasms: The roadmap to the future is much more than just a few shades of gray

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Asian Pacific Journal of Tropical Medicine 2016年第12期9卷 1193-1196页

作者： Tejas Kirtane Manoop s.Bhutani Department of Gastroenterology Hepatology and NutritionUniversity of Texas MD Anderson Cancer Center

Pancreatic cystic and neoplasms are being diagnosed with increasing frequency. Accurate diagnosis and determination of benign versus malignant lesions is crucial for determining need for surveillance versus surgery or endoscopic therapy as well as avoiding unnecessary surgery in cysts with no malignant potential. Tumor markers such as KRAs and GNAs hold promise, but which molecular marker or a combination of markers is most useful and cost effective remains to be seen. Advanced imaging with confocal laser endomicroscopy can serve as an optical biopsy and play a part in the diagnostic algorithm. Microforceps aided biopsy of pancreatic cyst wall and tumor contents hold great promise as they allow direct tissue acquisition. Much progress has been made in the role of EUs guided evaluation of pancreatic cystic neoplasms over the last several years, and with the advances enumerated above, the future is more than just a few shades of grey. Future studies should include prospective multiarm trials of microforceps biopsy versus conventional EUs-FNA and use of biochemical and molecular markers, confocal laser endomicroscopy or a combination thereof to determine best approach to pancreatic cystic neoplasms. In Osler's words, ‘Medicine is a science of uncertainty and an art of probability'. Incorporation of advanced imaging and molecular markers into a new diagnostic algorithm with subsequent validation through retrospective and prospective studies has the potential to increase diagnostic accuracy and guide optimal management of patients and improve outcomes.

关键词： EUs-FNA Endoscopic ultrasound Pancreatic cystic neoplasms Radiofrequency ablation nCLE Molecular markers

Local recurrence of a parosteal osteosarcoma 21 years after incomplete resection

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Chinese Journal of Cancer 2011年第12期30卷 861-866页

作者： Andrés Combalia Ernesto Muoz-Mahamud Antonio Palacín Jaume Pomés Vicente López Department of Orthopaedic surgery and Traumatology Orthopaedic Oncology Unit Hospital Clinic Faculty of Medicine University of Barcelona Barcelona 08036 Spain Department of Pathology Hospital Clinic Faculty of Medicine University of Barcelona Barcelona 08036 Spain Department of Radiology Hospital Clinic Faculty of Medicine University of Barcelona Barcelona 08036Spain

Parosteal osteosarcoma (POs) is the most common form of surface osteosarcoma. Its symptoms are insidious and its duration prior to diagnosis is considerably longer than that of other types of osteosarcoma. We report a case of POs with a growing mass but no evidence of metastasis. This tumor, which was diagnosed as calcified hematoma with benign characteristics, was incompletely resected in our hospital 21 years before the diagnosis of recurrence. The patient underwent a wide en bloc resection in our hospital and was free of symptoms, with no signs of tumor recurrence or metastasis during a 53-month follow-up.

关键词：骨肉瘤复发持续时间 POs 不完全诊断症状肿瘤

The second pluri-genus of smoothable Gorenstein surface singularities

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science China Mathematics 2010年第3期53卷 635-639页

作者： YAU stephen s. T. Department of Mathematics Statistics and Computer Science University of Illinois at Chicago

For complete intersection isolated surface singularities, Okuma gave a formula for the second plurigenus relating geometry genus, Milnor number and Tjurina number. We generalize Okuma’s theorem to Gorenstein smoothab... 详细信息

关键词： second pluri-genus smoothable Gorenstein Milnor number Tjurina number