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https://www.readbyqxmd.com/read/29679822/advanced-strategies-to-improve-nitrification-process-in-sequencing-batch-reactors-a-review
#1
REVIEW
Francisco Jaramillo, Marcos Orchard, Carlos Muñoz, Mauricio Zamorano, Christian Antileo
The optimization of biological nitrogen removal (BNR) in sequencing batch reactors has become the aim of researchers worldwide in order to increase efficiency and reduce energy and operating costs. This research has focused on the nitrification phase as the limiting reaction rate of BNR. This paper analyzes different strategies and discusses different tools such as: factors for achieving partial nitrification, real-time control and monitoring for detecting characteristic patterns of nitrification/denitrification as end-points, use of modeling based on activated sludge models, and the use of data-driven modeling for estimating variables that cannot be easily measured experimentally or online...
April 18, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29679272/steam-jet-mill-a-prospective-solution-to-industrial-exhaust-steam-and-solid-waste
#2
Mingxing Zhang, Haiyan Chen
Bulk industrial solid wastes occupy a lot of our resources and release large amounts of toxic and hazardous substances to the surrounding environment, demanding innovative strategies for grinding, classification, collection, and recycling for economically ultrafine powder. A new technology for grinding, classification, collection, and recycling solid waste is proposed, using the superheated steam produced from the industrial exhaust steam to disperse, grind, classify, and collect the industrial solid waste...
April 20, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29678927/digital-technologies-for-the-assessment-of-cognition-a-clinical-review
#3
REVIEW
Amy Chinner, Jasmine Blane, Claire Lancaster, Chris Hinds, Ivan Koychev
Dementia is the most widespread form of neurodegenerative disorder and is associated with an immense societal and personal cost. Prevalence of this disorder is projected to triple worldwide by 2050 leading to an urgent need to make advances in the efficiency of both its care and therapy research. Digital technologies are a rapidly advancing field that provide a previously unavailable opportunity to alleviate challenges faced by clinicians and researchers working in this area. This clinical review aimed to summarise currently available evidence on digital technologies that can be used to monitor cognition...
April 20, 2018: Evidence-based Mental Health
https://www.readbyqxmd.com/read/29678922/enzymatic-synthesis-of-6-sialyllactose-a-dominant-sialylated-human-milk-oligosaccharide-by-a-novel-exo-%C3%AE-sialidase-from-bacteroides-fragilis-nctc9343
#4
Longcheng Guo, Xiaodi Chen, Li Xu, Min Xiao, Lili Lu
Gut bacteria provide a rich source of glycosidases that can recognize and/or hydrolyze glycans for nutritions. Interestingly, some glycosidases are also found to catalyze transglycosylation reactions in vitro and thus can be used for oligosaccharide synthesis. In this work, six putative and one known exo -α-sialidase genes, including three from Bacteroides fragilis NCTC9343, three from Clostridium perfringens ATCC13124, and one known from Bifidobacterium bifidum JCM1254, were subjected to gene cloning and heterogeneous expression in Escherichia coli The recombinant enzymes were purified, characterized for substrate specificity, and screened for transglycosylation activity...
April 20, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29678210/ammoniacal-nitrogen-stripping-from-landfill-leachate-at-open-horizontal-flow-reactors
#5
Valderi D Leite, Juliana M R Paredes, Tales A T de Sousa, Wilton S Lopes, José T de Sousa
  The ammonia nitrogen stripping process at open horizontal flow reactors was evaluated and is described in this paper. The ammonia came from landfill leachate. Superficial loads of 650 kgN-<inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="00387-ilm02.gif"/>.ha-1.day-1 (phase 1), 750 kgN-<inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="00387-ilm03.gif"/>.ha-1.day-1 (phase 2), and 850 kgN-<inline-graphic xmlns:xlink="http://www...
May 1, 2018: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/29678128/spirpep-an-in-silico-digestion-based-platform-to-assist-bioactive-peptides-discovery-from-a-genome-wide-database
#6
Krittima Anekthanakul, Apiradee Hongsthong, Jittisak Senachak, Marasri Ruengjitchatchawalya
BACKGROUND: Bioactive peptides, including biological sources-derived peptides with different biological activities, are protein fragments that influence the functions or conditions of organisms, in particular humans and animals. Conventional methods of identifying bioactive peptides are time-consuming and costly. To quicken the processes, several bioinformatics tools are recently used to facilitate screening of the potential peptides prior their activity assessment in vitro and/or in vivo...
April 20, 2018: BMC Bioinformatics
https://www.readbyqxmd.com/read/29677560/effective-discovery-of-rare-variants-by-pooled-target-capture-sequencing-a-comparative-analysis-with-individually-indexed-target-capture-sequencing
#7
Seungjin Ryu, Jeehae Han, Trina M Norden-Krichmar, Nicholas J Schork, Yousin Suh
Identification of all genetic variants associated with complex traits is one of the most important goals in modern human genetics. Genome-wide association studies (GWAS) have been successfully applied to identify common variants, which thus far explain only small portion of heritability. Interests in rare variants have been increasingly growing as an answer for this missing heritability. While next-generation sequencing allows detection of rare variants, its cost is still prohibitively high to sequence a large number of human DNA samples required for rare variant association studies...
March 30, 2018: Mutation Research
https://www.readbyqxmd.com/read/29677498/dye-sensitized-solar-cells-using-catalytically-active-cuo-zno-nanocomposite-synthesized-by-single-step-method
#8
Nelsa Abraham, Alex Rufus, C Unni, Daizy Philip
In the present paper we report a low cost, single step preparation method for the synthesis of CuO-ZnO nanocomposite through simple co-precipitation technique using oxalic acid. To have a better idea about the deviations brought about by the inclusion of CuO in ZnO lattice, pure ZnO nanoparticles synthesized from 0.1M solutions were also investigated. X-ray diffraction studies showed that the composite contains only hexagonal wurtzite ZnO and monoclinic CuO structures. The magnetic studies of CuO-ZnO heterostructures were also conducted in order to elucidate the source of the ferromagnetism observed at room temperature...
April 10, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29677201/an-incremental-clustering-method-based-on-the-boundary-profile
#9
Junpeng Bao, Wenqing Wang, Tianshe Yang, Guan Wu
Many important applications continuously generate data, such as financial transaction administration, satellite monitoring, network flow monitoring, and web information processing. The data mining results are always evolving with the newly generated data. Obviously, for the clustering task, it is better to incrementally update the new clustering results based on the old data rather than to recluster all of the data from scratch. The incremental clustering approach is an essential way to solve the problem of clustering with growing Big Data...
2018: PloS One
https://www.readbyqxmd.com/read/29677068/health-care-costs-for-the-evaluation-surgery-and-follow-up-care-of-living-kidney-donors
#10
Steven Habbous, Sisira Sarma, Lianne Barnieh, Eric McArthur, Scott Klarenbach, Braden Manns, Mehmet A Begen, Krista L Lentine, Amit X Garg
BACKGROUND: The health care costs to evaluate, perform surgery, and follow a living kidney donor for the year after donation are poorly described. METHODS: We obtained information on the health care costs of 1099 living kidney donors between April 1, 2004 and March 31, 2014 from Ontario, Canada using comprehensive health care administrative databases. We estimated the cost of 3 periods of the living donation process: the predonation evaluation period (start of evaluation until the day before donation), perioperative period (day of donation until 30-days postdonation), and 1 year of follow-up period (after perioperative period until 1-year postdonation)...
April 19, 2018: Transplantation
https://www.readbyqxmd.com/read/29676876/exploring-the-role-of-advanced-nurse-practitioners-in-leadership
#11
Claire Anderson
There have been several changes to healthcare services in the UK over recent years, with rising NHS costs and increasing demands on healthcare professionals to deliver high-quality care. Simultaneously, public inquiries have identified suboptimal leadership throughout the NHS, which has been linked to a lack of clear leadership across the healthcare professions. In nursing, the role of the advanced nurse practitioner is regarded as a solution to this leadership challenge. This article examines the background to the development of the advanced nurse practitioner role...
April 19, 2018: Nursing Standard
https://www.readbyqxmd.com/read/29676764/distribution-of-human-fecal-marker-gb-124-bacteriophages-in-urban-sewage-and-reclaimed-water-of-s%C3%A3-o-paulo-city-brazil
#12
Tatiana Prado, Antônio de Castro Bruni, Mikaela Renata Funada Barbosa, Vilma Marques Santos Bonanno, Suzi Cristina Garcia, Maria Inês Zanoli Sato
Bacteriophages infecting Bacteroides fragilis GB-124 have been described as potential markers of human fecal contamination in water sources. The aim of this study was to evaluate the occurrence of GB-124 phages in raw sewage, secondary effluents and reclaimed water of the São Paulo city using a low-cost microbial source tracking method. Samples were collected monthly from April 2015 to March 2016 in four municipal wastewater treatment plants that operate with activated sludge processes followed by different tertiary treatments (sand-anthracite filtration, membrane bioreactor/reverse osmosis) and final chlorination...
April 2018: Journal of Water and Health
https://www.readbyqxmd.com/read/29676751/carbon-source-recovery-from-excess-sludge-by-mechanical-disintegration-for-biological-denitrification
#13
M Zubrowska-Sudol
The goal of the study was to evaluate the possibility of carbon source recovery from excess sludge by mechanical disintegration for biological denitrification. The total efficiency of denitrification, unit demand for organic compounds for denitrification, unit volume of disintegrated sludge and unit cost of nitrogen removal as a function of energy density used for excess sludge disintegration (70, 140 and 210 kJ/L) were analyzed. In the study a full-scale disc disintegrator was used (motor power: 30 kWh, motor speed: 2,950 rpm)...
April 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29676144/magnesium-stabilized-multifunctional-dna-nanoparticles-for-tumor-targeted-and-ph-responsive-drug-delivery
#14
Haoran Zhao, Xuexia Yuan, Jiantao Yu, Yishun Huang, Chen Shao, Fan Xiao, Li Lin, Yan Li, Leilei Tian
Functional nucleic acids, that can target cancer cells and realize stimuli-responsive drug-delivery in tumor microenvironment, have been widely applied for anti-cancer chemotherapy. At present, the high cost, unsatisfactory biostability, and complicated fabrication process are the main limits for the development of DNA-based drug-delivery nanocarriers. Here a doxorubicin (Dox)-delivery nanoparticle for tumor-targeting chemotherapy is developed taking advantage of rolling-circle-amplification (RCA) technique, by which a high quantity of functional DNAs can be efficiently collected...
April 20, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29675877/design-of-novel-wearable-stretchable-and-waterproof-cable-type-supercapacitors-based-on-high-performance-nickel-cobalt-sulfide-coated-etching-annealed-yarn-electrodes
#15
Yuejiao Chen, Bingang Xu, Jianfeng Wen, Jianliang Gong, Tao Hua, Chi-Wai Kan, Jiwei Deng
Rapid advances in functional electronics bring tremendous demands on innovation toward effective designs of device structures. Yarn supercapacitors (SCs) show advantages of flexibility, knittability, and small size, and can be integrated into various electronic devices with low cost and high efficiency for energy storage. In this work, functionalized stainless steel yarns are developed to support active materials of positive and negative electrodes, which not only enhance capacitance of both electrodes but can also be designed into stretchable configurations...
April 19, 2018: Small
https://www.readbyqxmd.com/read/29675598/design-of-a-biorthogonal-wavelet-transform-based-r-peak-detection-and-data-compression-scheme-for-implantable-cardiac-pacemaker-systems
#16
Ashish Kumar, Manjeet Kumar, Rama Komaragiri
Bradycardia can be modulated using the cardiac pacemaker, an implantable medical device which sets and balances the patient's cardiac health. The device has been widely used to detect and monitor the patient's heart rate. The data collected hence has the highest authenticity assurance and is convenient for further electric stimulation. In the pacemaker, ECG detector is one of the most important element. The device is available in its new digital form, which is more efficient and accurate in performance with the added advantage of economical power consumption platform...
April 19, 2018: Journal of Medical Systems
https://www.readbyqxmd.com/read/29675522/modelling-of-adsorption-and-intercalation-of-hydrogen-on-into-tungsten-disulphide-multilayers-and-multiwall-nanotubes
#17
José I Martínez, Alex Laikhtman, Hoi Ri Moon, Alla Zak, Julio A Alonso
Understanding the interaction of hydrogen with layered materials is crucial in the fields of sensors, catalysis, fuel cells and hydrogen storage, among others. Density functional theory, improved by the introduction of van der Waals dispersion forces, provides an efficient and practical workbench to investigate the interaction of molecular and atomic hydrogen with WS2 multilayers and nanotubes. We find that H2 physisorbs on the surface of those materials on top of W atoms, while atomic H chemisorbs on top of S atoms...
April 20, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29675243/electronic-modulation-of-transition-metal-phosphide-via-doping-as-efficient-and-ph-universal-electrocatalysts-for-hydrogen-evolution-reaction
#18
Xin Xiao, Leiming Tao, Man Li, Xiaowei Lv, Dekang Huang, Xingxing Jiang, Haiping Pan, Mingkui Wang, Yan Shen
It is highly desirable to develop efficient and low-cost catalysts to minimize the overpotential of the hydrogen evolution reaction (HER) for large-scale hydrogen production from electrochemical water splitting. Doping a foreign element into the host catalysts has been proposed as an effective approach to optimize the electronic characteristics of catalysts and thus improve their electrocatalytic performance. Herein we, for the first time, report vanadium-doped CoP on self-supported conductive carbon cloth (V-CoP/CC) as a robust HER electrocatalyst, which achieves ultra-low overpotentials of 71, 123 and 47 mV to afford a current density of 10 mA cm-2 in 1 M KOH, 1 M PBS and 0...
February 21, 2018: Chemical Science
https://www.readbyqxmd.com/read/29675231/encapsulation-of-ultrafine-metal-oxide-nanoparticles-within-mesopores-for-biomass-derived-catalytic-applications
#19
Ruiqi Fang, Panliang Tian, Xianfeng Yang, Rafael Luque, Yingwei Li
The development of efficient encapsulation strategies has attracted intense interest for preparing highly active and stable heterogeneous metal catalysts. However, issues related to low loadings, costly precursors and complex synthesis processes restrict their potential applications. Herein, we report a novel and general strategy to encapsulate various ultrafine metal-oxides nanoparticles (NPs) into the mesoporous KIT-6. The synthesis is facile, which only involves self-assembly of a metal-organic framework (MOF) precursor in the silica mesopores and a subsequent calcination process to transform the MOF into metal-oxide NPs...
February 21, 2018: Chemical Science
https://www.readbyqxmd.com/read/29675186/extraction-of-nickel-from-nife-ldh-into-ni-2-p-nife-hydroxide-as-a-bifunctional-electrocatalyst-for-efficient-overall-water-splitting
#20
Fang-Shuai Zhang, Jia-Wei Wang, Jun Luo, Rui-Rui Liu, Zhi-Ming Zhang, Chun-Ting He, Tong-Bu Lu
The development of highly efficient, low-cost and stable electrocatalysts for overall water splitting is highly desirable for the storage of intermittent solar energy and wind energy sources. Herein, we show for the first time that nickel can be extracted from NiFe-layered double hydroxide (NiFe-LDH) to generate an Ni2 P@FePO x heterostructure. The Ni2 P@FePO x heterostructure was converted to an Ni2 P@NiFe hydroxide heterostructure (P-NiFe) during water splitting, which displays high electrocatalytic performance for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in 1...
February 7, 2018: Chemical Science
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