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Evaluation of natural goethite on the removal of arsenate and selenite from water

Journal of Environmental Sciences 2019年第2期31卷 133-141页

作者： andrew T.Jacobson Maohong Fan Department of Chemical Engineering University of Wyoming

Elevated arsenic and selenium concentrations in water cause health problems to both humans and wildlife. Natural and anthropogenic activities have caused contamination of these elements in waters worldwide, making the development of efficient cost-effective methods in their removal essential. In this work, removal of arsenate and selenite from water by adsorption onto a natural goethite(α-FeO OH) sample was studied at varying conditions. The data was then compared with other arsenate, selenite/goethite adsorption systems as much of literature shows discrepancies due to varying adsorption conditions. Characterization of the goethite was completed using inductively coupled plasma mass spectrometry, X-ray diffraction, Fouriertransform infrared spectroscopy, scanning electron microscopy, and Brunauer–Emmett–Teller surface area analysis. Pseudo-first order(PFO) and pseudo-second order(PSO) kinetic models were applied; including comparisons of different regression methods. Various adsorption isotherm models were applied to determine the best fitting model and to compare adsorption capacitates with other works. Desorption/leaching of arsenate and selenite was studied though the addition of phosphate and hydroxyl ions. Langmuir isotherm modeling resulted in maximum adsorption capacities of 6.204 and 7.740 mg/g for arsenate and selenite adsorption,respectively. The PSO model applied with a non-linear regression resulted in the best kinetic fits for both adsorption and desorption of arsenate and selenite. Adsorption decreased with increasing pH. Phosphate induced desorption resulted in the highest percentage of arsenate and selenite desorbed, while hydroxide induced resulted in the fastest desorption kinetics.

关键词： Arsenic Selenium Adsorption Desorption FeOOH Water treatment

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ATM performance measurement in Europe,the US and China

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Chinese Journal of Aeronautics 2017年第2期30卷 479-490页

作者： andrew Cook Seddik Belkoura Massimiliano Zanin Department of Planning and Transport University of Westminster 35 Marylebone Road London NW1 5LS United Kingdom The Innaxis Foundation and Research Institute Jose Ortega y Gasset 20 Madrid 28006 Spain Faculdade de Ciencias e Tecnologia Departamento de Engenharia Electrotecnica Universidade Nova de Lisboa Lisboa 2829-516 Portugal

Air traffic management（ATM） performance and the metrics used in its assessment are investigated for the first time across the three largest ATM world regions：Europe,the US and *** market structure and flow management practices of each region are presented.A wide range of performance data across these three regions is *** topological and performance assessment,the notion of a ＇sufficient＇ sample is often non-intuitive：many metrics may behave non-monotonically as a function of sampling *** and under-developed metrics are identified,and the need for a balance between standardisation and flexibility is *** and cross-sectional metric trade-offs are identified.

关键词： Air traffic management Data Metric Performance Sampling Topology

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CFD investigation of dense phase pneumatic conveying at a pipeline enlargement

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Particuology 2012年第2期10卷 176-183页

作者： Don McGlinchey andrew Cowell Ryan Crowe School of Engineering and Computing Glasgow Caledonian University Glasgow Scotland UK

The practice of stepping a conveying line is not new and there are many examples in industry; however, the details of the flow behaviour at the step have not been extensively studied. Three step geometries were modelled： an ＇abrupt＇ step and two ＇gradual＇ step-up geometries from a pipe bore of 75-100 ram. The flow behaviour of a single plug of material passing through these geometries was investigated using the ＇Eulerian＇ CFD model from Fluent. Solids volume fractions were recorded at 0.01 s time steps at several point locations, and visualised throughout the pipe.

关键词： Pneumatic conveyingStepped pipelinePlug flowCFD

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Identifying MicroRNA and Gene Expression Networks Using Graph Communities

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Tsinghua Science and Technology 2016年第2期21卷 176-195页

作者： Benika Hall andrew Quitadamo Xinghua Shi Department of Bioinformatics University of North Carolina at CharlotteCharlotteNC 28213USA.

Integrative network analysis is powerful in helping understand the underlying mechanisms of genetic and epigenetic perturbations for disease studies. Although it becomes clear that microRNAs, one type of epigenetic factors, have direct effect on target genes, it is unclear how microRNAs perturb downstream genetic neighborhood. Hence, we propose a network community approach to integrate microRNA and gene expression profiles, to construct an integrative genetic network perturbed by microRNAs. We apply this approach to an ovarian cancer dataset from The Cancer Genome Atlas project to identify the fluctuation of microRNA expression and its effects on gene expression. First, we perform expression quantitative loci analysis between microRNA and gene expression profiles via both a classical regression framework and a sparse learning model. Then, we apply the spin glass community detection algorithm to find genetic neighborhoods of the microRNAs and their associated genes. Finally, we construct an integrated network between microRNA and gene expression based on their community structure. Various disease related microRNAs and genes, particularly related to ovarian cancer, are identified in this network. Such an integrative network allows us to investigate the genetic neighborhood affected by microRNA expression that may lead to disease manifestation and progression.

关键词： network integration graph community detection spin glass algorithm microRNA networks

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Battery prognostics and health management for electric vehicles under industry 4.0

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Journal of Energy Chemistry 2023年第9期84卷 30-33页

作者： Jingyuan Zhao andrew F.Burke Institute of Transportation Studies University of California DavisDavisCA 95616USA

Transportation electrification is essential for decarbonizing transport. Currently, lithium-ion batteries are the primary power source for electric vehicles (EVs). However, there is still a significant journey ahead before EVs can establish themselves as the dominant force in the global automotive market. Concerns such as range anxiety, battery aging, and safety issues remain significant challenges.

关键词： Lithium-ion battery Prognostics and health management Machine learning Cloud Artificial intelligence Digital twins Lifelong learning

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Nondegloving technique for Peyronie＇s disease with penile prosthesis implantation and double dorsal-ventral patch graft

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Asian Journal of Andrology 2018年第1期20卷 90-92页

作者： andrew Fang Run Wang Division of Urology University of Texas McGovern Medical School Houston Texas 77030 USA Department of Urology University of Texas MD Anderson Cancer Center Houston Texas 77030 USA

Acircumcising incision to deglove the penis for penile prosthesis （PP） implantation can increase the risk of ischemic injury to the glans penis. In order to avoid vascular complications, we describe a novel technique utilizing a ventral incision to perform the PP implantation and a double-dorsal patch graft, or ＂sliding technique＂（ST）, in patients with severe Peyronie＇s disease （PD）.＇Ihree patients with severe PD and erectile dysfunction at our institution underwent ST and PP implantation through a ventral incision. ＂[his new approach was not only successful in facilitating the ST and PP implantation in these patients but also allowed for adequate exposure of the penile shaft with no reported loss of sensation.

关键词： vascular complications erectile dysfunction

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The Harvard method of Tau calculation is incorrect

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Journal of Geriatric Cardiology 2019年第5期16卷 429-430页

作者： andrew Horning Xufang Bai Konica Minolta Healthcare Americas FreedomIN 47431USA University of Ottawa Heart Institute 40 Ruskin StOttawaON K1Y 4W7Canada

Tau,left ventricular diastolic time constant,is the most established index to describe left ventricular diastolic *** has been commonly derived only as an invasive measurement in the catheter lab,where it is inconvenient,expensive and time *** 1992,a non-invasive formula was proposed in Harvard to calculate Tau in an Echo lab.[1]Five years later,it was clinically corroborated by Scalia,et al.[2]Unfortunately,we think this method is *** top of the bold assumptions used in the mathematical deduction process,[3]there are logical flaws in the Harvard formula.

关键词： Distolic function Doppler echocardiography Noninvasive Tau

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Living mycelium composites discern weights via patterns of electrical activity

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Journal of Bioresources and Bioproducts 2022年第1期7卷 26-32页

作者： andrew Adamatzky Antoni Gandia Unconventional Computing Laboratory University of the West of EnglandBristolUK Institute for Plant Molecular and Cell Biology CSIC-UPVValenciaSpain

Fungal construction materials-substrates colonised by mycelium-are getting increased recog-nition as viable ecologically friendly alternatives to conventional building materials.A function-ality of the constructions made from fungal materials would be enriched if blocks with living mycelium,known for their ability to respond to chemical,optical and tactile stimuli,were *** investigated how large blocks of substrates colonised with mycelium of Ganoderma resinaceum responded to stimulation with heavy *** analysed details of the electrical re-sponses to the stimulation with weights and show that ON and OFF stimuli can be discriminated by the living mycelium composites and that a habituation to the stimulation *** of the results cast in the reporting on changes in electrical spiking activity of mycelium bound composites in response to a heavy loads.

关键词： Fungi Unconventional materials Electrical activity Bionics

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Transposable elements at the center of the crossroads between embryogenesis, embryonic stem cells, reprogramming,and long non-coding RNAs

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Science Bulletin 2015年第20期60卷 1722-1733页

作者： andrew Paul Hutchins Duanqing Pei Key Laboratory of Regenerative Biology South China Institute for Stem Cell Biology and Regenerative Medicine Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine South China Institute for Stem Cell Biology and Regenerative Medicine Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou Branch of the Supercomputing Center of Chinese Academy of Sciences South China Institute for Stem Cell Biology and Regenerative Medicine Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences

Transposable elements(TEs) are mobile genomic sequences of DNA capable of autonomous and nonautonomous duplication. TEs have been highly successful,and nearly half of the human genome now consists of various families of TEs. Originally thought to be non-functional,these elements have been co-opted by animal genomes to perform a variety of physiological functions ranging from TE-derived proteins acting directly in normal biological functions, to innovations in transcription factor logic and influence on epigenetic control of gene expression. During embryonic development, when the genome is epigenetically reprogrammed and DNA-demethylated, TEs are released from repression and show embryonic stage-specific expression, and in human and mouse embryos, intact TEderived endogenous viral particles can even be detected. Asimilar process occurs during the reprogramming of somatic cells to pluripotent cells: When the somatic DNA is demethylated, TEs are released from repression. In embryonic stem cells(ESCs), where DNA is hypomethylated, an elaborate system of epigenetic control is employed to suppress TEs, a system that often overlaps with normal epigenetic control of ESC gene expression. Finally, many long non-coding RNAs(lnc RNAs) involved in normal ESC function and those assisting or impairing reprogramming contain multiple TEs in their RNA. These TEs may act as regulatory units to recruit RNA-binding proteins and epigenetic modifiers. This review covers how TEs are interlinked with the epigenetic machinery and lnc RNAs, and how these links influence each other to modulate aspects of ESCs,embryogenesis, and somatic cell reprogramming.

关键词： Transposable elements Endogenousretroviruses Embryonic stem cells lncRNA Reprogramming Pluripotency

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Antimicrobial usage and resistance in beef production

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Journal of Animal Science and Biotechnology 2017年第2期8卷 249-270页

作者： andrew Cameron Tim A.McAllister Faculty of Veterinary Medicine University of CalgaryCalgaryABCanada Agriculture and Agri-Food Canada LethbridgeABCanada

Antimicrobials are critical to contemporary high-intensity beef production. Many different antimicrobials are approved for beef cattle, and are used judiciously for animal welfare, and controversially, to promote growth and feed efficiency. Antimicrobial administration provides a powerful selective pressure that acts on the microbial community, selecting for resistance gene determinants and antimicrobial-resistant bacteria resident in the bovine flora. The bovine microbiota includes many harmless bacteria, but also opportunistic pathogens that may acquire and propagate resistance genes within the microbial community via horizontal gene transfer. Antimicrobial-resistant bovine pathogens can also complicate the prevention and treatment of infectious diseases in beef feedlots,threatening the efficiency of the beef production system. Likewise, the transmission of antimicrobial resistance genes to bovine-associated human pathogens is a potential public health concern. This review outlines current antimicrobial use practices pertaining to beef production, and explores the frequency of antimicrobial resistance in major bovine pathogens. The effect of antimicrobials on the composition of the bovine microbiota is examined, as are the effects on the beef production resistome. Antimicrobial resistance is further explored within the context of the wider beef production continuum, with emphasis on antimicrobial resistance genes in the food chain, and risk to the human population.

关键词： Antibiotics Antimicrobial resistance Antimicrobial usage Beef production Bovine pathogens Bovine microbiota Cattle Enteropathogens Fecal bacteria Resistome

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