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Pedosphere 2018年第3期28卷 422-429页

作者： Zhong MA Jennifer FLYNN grant LIBRA Zechuan SHI Department of Biology Truman State University

Phosphorus （P） is a major limiting factor for plant productivity in many ecosystems and agriculture. The projected increase in atmospheric CO2 is likely to result in changes in plant mineral consumption and growth. We studied P depletion by common bean （Phaseolus vulgaris） cultured hydroponically under am.ient （377±77μmol mol^-1） or elevated （650±32 μmol mol^-1） CO2 in media of low or high P. Under elevated CO2 compared to am.ient CO2, the maximum P depletion rate increased by 98% at low P and 250% at high P, and P was depleted about 2-5 weeks sooner; leaf acid phosphatase （APase） activity and chlorophyll content both increased significantly; root-to-shoot ratio increased significantly at high P, although it was unaffected at low P; lateral root respiration rate showed no change, suggesting that COs did not affect P depletion via metabolic changes to the roots; the total biomass at final harvest was significantly higher at both low and high P. Our data showed that the increased rate and am.unt of P depletion during plant growth under elevated CO2 occurred in association with alterations in leaf biochemical properties, i.e., enhanced activities of leaf APase and increased leaf chlorophyll content.

关键词： acid phosphatase biomass partitioning chlorophyll climate change dry matter accumulation mineral nutrition

Prognosis Factors of Urinary Quality of Life in Parkinson Disease

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Open Journal of Therapy and Rehabilitation 2024年第1期12卷 10-17页

作者： Ngor Side Diagne Sakhi Othman Ababacar Mam.dou Gueye Marie Jeanne Sakho Fatou Dialo Mboup am.lie Ndeye Makaram. Sy Papa Ndiouga Lo Ba Seydina Ousmane Anna Modji Basse Maouly Fall Adjaratou Dieynaba Sow Moustapha Ndiaye am.dou Gallo Diop Physical Médicine and Rehabilitation Department Fann Teaching Hospital Dakar Senegal Neurology Department Pikine Hospital Dakar Senegal Physical Médicine and Rehabilitation Department Ibn Rochd Teaching Hospital Casablanca Morocco Physical Médicine and Rehabilitation Department Military Hospital Dakar Senegal Neurology Department Fann Teaching Hospital Dakar Senegal

Introduction: Quality of life in Parkinson disease is not necessary linked to motor symptoms. It’s correlated of overactive bladders and prostatic symptoms. Prognosis factors of urinary quality of life are unknown. Objectives: Our study aims to find prognosis factors of quality of life associated specifically of urinary disorders in PD. Patients and methods: We conducted a transversal, analytic and descriptive study in Physical Medicine, and Neurology departments, Fann Teaching Hospital, Dakar and included patients followed for treatment of PD. Urinary disorders, quality of life and functional autonomy were assessed respectively by Urinary Symptoms Profile (USP), Qualiven Short Form, Schwab and England Scale. Results: 38 patients presented PD, with a mean age of 60.89 ± 13.6 years and sex-ratio of 2.45. Mean duration of PD was 3.1 ± 2.9 years. Urinary disorders were found in 47.36% and dominated by incontinence (88.88%) and overactive bladders (88.88%) which were minor in more than 55%. Quality of life was impaired in 88.88% of cases. Minor forms (43.75%) were predominant and constraint dimension (50%) was the most severely altered. Prognosis factors for quality of life of urinary disorders were PD stages (0.046) and functional autonomy (0.042). Discussion and conclusion: Urinary disorders in PD are common, impaired quality of life, especially the constraint dimension, depends on stage of evolution of PD and functional autonomy of patients.

关键词： Urinary Quality of Life Parkinson Disease Dakar

Interactive Effect of Potassium and Phosphorus on Grain Quality and Profitability of Sunflower in Northwest Pakistan

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Pedosphere 2011年第4期21卷 532-538页

作者： am.ANULLAH M.W.KHAN Department of Agronomy Khyber Pakhtunkhwa Agricultural University

A field experiment was conducted using a split plot randomized complete block design with three replications to study the effects of potassium (K) and phosphorus (P) application on sunflower (Helianthus annuus L.) growth at the New Developmental Research Farm of Khyber Pakhtunkhwa Agricultural University in Peshawar,*** levels of K (0,25,50,75,100 and 125 kg K ha-1) were main plots while four levels of P (0,45,90 and 135 kg P ha-1) were *** in both K and P levels enhanced grain oil concentration of *** in P level increased grain protein concentration,while increase in K level decreased grain protein *** oil and protein yields increased significantly with increase in K and P *** increase in oil and protein yields of sunflower was mainly attributed to the improvement in yield components (grains per head,grain weight and head size) and the significant increase in grain *** highest net returns of 297 and 368 US$ ha-1 based on grain and oil yields,respectively,were obtained from a combination of 100 kg K ha-1 + 45 kg P ha-1.

关键词： economic analysis grain yield oil content protein content

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老年流行病学及其挑战

国外医学(老年医学分册) 1987年第2期 69-72页

作者： Davies am. 杜祥林

人口出生率、婴儿死亡率和传染病死亡率的下降,引起老龄人口不断增加。这种趋势起始于发达国家,而后以不同速度扩展到其它大多数国家,老龄人口的数量和比例在不断升高。这种人口转变对经济和社会组织产生了深刻的影响。这种影响继续扩... 详细信息

人口出生率、婴儿死亡率和传染病死亡率的下降,引起老龄人口不断增加。这种趋势起始于发达国家,而后以不同速度扩展到其它大多数国家,老龄人口的数量和比例在不断升高。这种人口转变对经济和社会组织产生了深刻的影响。这种影响继续扩大,在本世纪末将成为全球性问题。因为不仅人口在老化,而且衰弱和高龄老人的比例也在加大。本文评述老龄人口的经历和后果、死亡、发病和残疾的资料以及新方法的需求。主要目的在于指出其对流行病学技术的最新挑战。人口转变及其后果全球性老化老年人口比例增加、年轻人比例减少和平均年龄升高都是用来确定人口老化的指标。然而它们未必相等。人群老化的人口学过程主要是由于死亡

关键词：老龄人口人口转变人口老化人口出生率老年人口比例性别比例婴儿死亡率人口金字塔人口结构人口增长

A procedure of determining potential energy surfaces of triatomic molecules from inversion of spectroscopic data

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Chinese Journal of Chemistry 1995年第6期13卷 510-514页

作者： Xie, DQ Yan, GS Tian, am SICHUAN UNIV DEPT CHEMCHENGDU 610064SICHUANPEOPLES R CHINA

In this paper, we have suggested an iterative procedure of optimization of the linear param.ters in an analytic potential energy function for a triatomic molecule, by combining both variational and second order perturbation methods. The most important feature of this procedure is that the objective function is an analytical expression which can be optimized easily. The application to the water molecule is presented.

关键词： potential energy surface triatomic molecule molecular vibrations variational method

Structure Based Library Approach to Photosynthesis Inhibitors:The Solid Phase Synthesis of Hydro-Uracils and Thiouracils

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Chinese Chemical Letters 1998年第2期9卷 139-142页

作者： Yu, am.Yang, HZ Zhang, ZP Nankai Univ State Key Lab Elementoorgan Chem Tianjin 300071 Peoples R China Nankai Univ State Key Lab Funct Polymer Mat Adsorpt & Separat Tianjin 300071 Peoples R China

A general method for the solid phase synthesis of hydro-uracils and thiouracils is described. Resino ester 2 reacts with various primary am.nes to give secondary am.nes 3, which are converted to the resino ureas (thioureas) 4 by treatment with isocyanates (isothiocyanates). Preparation of the hydro-uracils and thiouracils 5 is achieved by acidic cyclization-cleavage from the resin. The synthesis is designed to be am.nable for structure based library approach to photosystem II D1 protein inhibitors.

关键词： solid phase synthesis hydro-uracils and thiouracils photosynthesis inhibitors

Fabrication of Superhydrophobic Surfaces on Aluminum Alloy Via Electrodeposition of Copper Followed by Electrochemical Modification

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Nano-Micro Letters 2011年第3期3卷 160-165页

作者： Ying Huang D.K.Sarkar X-grant Chen University Research Center on Aluminum (CURAL) University of Qubec at Chicoutimi

Superhydrophobic aluminum surfaces have been prepared by means of electrodeposition of copper on aluminum surfaces, followed by electrochemical modification using stearic acid organic molecules. Scanning electron microscopy(SEM) images show that the electrodeposited copper films follow "island growth mode" in the form of microdots and their number densities increase with the rise of the negative deposition potentials. At an electrodeposition potential of-0.2 V the number density of the copper microdots are found to be 4.5×104cm^(-2)that are increased to 2.9×105cm^(-2)at a potential of-0.8 V. Systematically, the distances between the microdots are found to be reduced from 26.6 μm to 11.03 μm with the increase of negative electrochemical potential from-0.2 V to-0.8 V. X-ray diffraction(XRD) analyses have confirmed the formation of copper stearate on the stearic acid modified copper films. The roughness of the stearic acid modified electrodeposited copper films is found to increase with the increase in the density of the copper microdots. A critical copper deposition potential of-0.6 V in conjunction with the stearic acid modification provides a surface roughness of 6.2 μm with a water contact angle of 157?, resulting in superhydrophobic properties on the aluminum substrates.

关键词： Superhydrophobic aluminum surface Water contact angle Copper microdots Surface roughness Electrochemical modification

Assessing Potential Earthquake Loss in Me′rida State, Venezuela Using Hazus

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International Journal of Disaster Risk Science 2014年第3期5卷 176-191页

作者： am.rica Bendito Jesse Rozelle Douglas Bausch Civil Engineering Department Universidad de Los AndesMe´rida 5101Venezuela Mitigation Division Federal Emergency Management Agency(FEMA)Region VIIIDenverCO 80225USA

The focus of the Hazus earthquake model has been largely U.S. centric due to a lack of standardized building-infrastructure data formats applicable *** a combined effort between FEMA Region VIII and the Universidad de Los Andes, Venezuela, the present study uses the Hazus 2.1 software to simulate earthquake loss estimations for Venezuela. Population totals and demographic distributions were developed using Oak Ridge National Labs Landscan 2008 population data and the census 2011 for Venezuela. The accuracy of the model was further enhanced for Me′rida State, located in western Venezuela, by collecting, incorporating, and developing region and specific inventories including soil maps, liquefaction and landslide susceptibility studies, demographic data, and building inventory information. We used USGS Shake Maps scenarios for two potential earthquake events with peak ground accelerations proposed within Performance Based Seismic Engineering of Buildings, VISION 2000 recommendations. The region has not witnessed an earthquake with a magnitude greater than M 7 in the last120 years. Given the historical record of seismicity and the seismotectonics in the region, it becomes increasingly important to understand the potential implications from moderate to large earthquakes in Me′rida State, Venezuela.

关键词： Disaster loss estimation Earthquake dam.ge Hazus Seismic risk Venezuela

Method for the determination of polonium-210 in tea sam.les using response surface methodology(RSM)

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Nuclear Science and Techniques 2019年第3期30卷 75-81页

作者： Sermin ?am.Kaynar ümit H.Kaynar Physics Department Faculty of Science and Letters Manisa Celal Bayar University Science Education Faculty of Education Manisa Celal Bayar University

The method based on solvent param.ters(mass,cycle of acidification, and autodeposition time), combined with response surface methodology(RSM) modeling and optimization, has been developed for maximizing ^(210)Po activity in tea sam.les, as observed by an alpha spectrometer. RSM based on 3-factor and 5-level composite center design was used to obtain the optimal combination of solvent conditions. As solvent param.ters for ^(210)Po activity, different masses(0.5, 0.75, 1, 1.5, and 2 g), different cycles of acidification(2, 3, 4, 5, and 6 times), and different autodeposition times(2, 3, 4, 5, and 6 h) were studied. The 3D response surface plot and the contour plot derived from the mathematical models were used to determine the optimal conditions. According to the obtained results, the experimental value of ^(210)Po activity was in good agreement(R^2=0.96) with the value predicted by the model. We found a favorable effect of mass on the ^(210)Po activity(p\0.05).

关键词： ^210Po activity Tea Response surface methodology

Surgical management in pediatric neuroblastoma diagnosis and treatment:a 20-year,single-center experience

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World Journal of Pediatrics 2022年第2期18卷 120-125页

作者： Brianna Spencer Akshilkumar Patel Robert Cilley Christa N.grant Department of Surgery Penn State Health Milton SHershey Medical Center500 University DriveHersheyPA 17033USA Pennsylvania State University College of Medicine HersheyPAUSA Division of Pediatric Surgery Penn State Health Milton SHershey Medical CenterHersheyPAUSA

Background The currently utilized International Neuroblastoma Risk Group(INRG)staging system developed in 2009 uses image-defined risk factors as a measure of surgical risk,separating resectable neuroblastoma from those best preceded by *** previous International Neuroblastoma Staging System was based primarily on surgical *** hypothesized there would be a change to the role of the surgeon in neuroblastoma treatment in the more recent *** This is a single center 20-year retrospective analysis of 104 patients with International Classification of Diseases-9 and-10 codes for *** demographics,tumor site,cancer treatment modality,survival,biopsy technique,surgical intervention,and pathology staging were *** was analyzed by analysis of variance(ANOVA)and Student’s t *** There was a decrease in open surgeries for extra-adrenal neuroblastomas in the later decade(77%,31%,P=0.01).There was a narrowing of the time interval to surgery in the later cohort,likely as a result of uniformity in surgical timing on treatment protocols relying on INRG *** Our findings mirror changes in practice patterns *** found an increase in minimally invasive approaches but did not find a difference in the role of the surgeon under the INRG staging system.

关键词： International Neuroblastoma Risk Group International Neuroblastoma Staging System MYCN Neuroblastoma Resection