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https://www.readbyqxmd.com/read/28550814/determination-of-equilibrium-structures-of-bromothymol-blue-revealed-by-using-quantum-chemistry-with-an-aid-of-multivariate-analysis-of-electronic-absorption-spectra
#1
Toru Shimada, Takeshi Hasegawa
The pH dependent chemical structures of bromothymol blue (BTB), which have long been under controversy, are determined by employing a combined technique of multivariate analysis of electronic absorption spectra and quantum chemistry. Principle component analysis (PCA) of the pH dependent spectra apparently reveals that only two chemical species are adequate to fully account for the color changes, with which the spectral decomposition is readily performed by using augmented alternative least-squares (ALS) regression analysis...
May 19, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28550813/a-reliable-sewage-quality-abnormal-event-monitoring-system
#2
Tianling Li, Melissa Winnel, Hao Lin, Jared Panther, Chang Liu, Roger O'Halloran, Kewen Wang, Taicheng An, Po Keung Wong, Shanqing Zhang, Huijun Zhao
With closing water loop through purified recycled water, wastewater becomes a part of source water, requiring reliable wastewater quality monitoring system (WQMS) to manage wastewater source and mitigate potential health risks. However, the development of reliable WQMS is fatally constrained by severe contamination and biofouling of sensors due to the hostile analytical environment of wastewaters, especially raw sewages, that challenges the limit of existing sensing technologies. In this work, we report a technological solution to enable the development of WQMS for real-time abnormal event detection with high reliability and practicality...
May 20, 2017: Water Research
https://www.readbyqxmd.com/read/28550805/enantioselective-accumulation-metabolism-and-phytoremediation-of-lactofen-by-aquatic-macrophyte-lemna-minor
#3
Fang Wang, Xiaotong Yi, Han Qu, Li Chen, Donghui Liu, Peng Wang, Zhiqiang Zhou
Pesticides are frequently detected in water bodies due to the agricultural application, which may pose impacts on aquatic organisms. The enantioselective bioaccumulation and metabolism of the herbicide lactofen in aquatic floating macrophyte Lemna minor (L. minor) were studied and the potential L. minor phytoremediation was investigated. Ultra-high performance liquid chromatography - tandem mass spectrometry (UHPLC-MS-MS) analysis for lactofen and its two known metabolites in L. minor was performed. The initial concentrations of racemic lactofen, R-lactofen and S-lactofen were all 30μgL(-1) in the growth solution...
May 24, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28550791/environmental-indicators-of-the-combustion-of-prospective-coal-water-slurry-containing-petrochemicals
#4
Margarita A Dmitrienko, Galina S Nyashina, Pavel A Strizhak
Negative environmental impact of coal combustion has been known to humankind for a fairly long time. Sulfur and nitrogen oxides are considered the most dangerous anthropogenic emissions. A possible solution to this problem is replacing coal dust combustion with that of coal water slurry containing petrochemicals (CWSP). Coal processing wastes and used combustible liquids (oils, sludge, resins) are promising in terms of their economic and energy yield characteristics. However, no research has yet been conducted on the environmental indicators of fuels based on CWSP...
May 18, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28550788/a-case-report-of-venous-thrombosis-after-kidney-transplantation-we-can-save-the-graft-time-is-the-success-factor
#5
Paulo Roberto Kawano, Hamilto Akihissa Yamamoto, Rodrigo Gerra, Paula Dalsoglio Garcia, Mariana Moraes Contti, Hong Si Nga, Henrique Mochida Takase, Ariane Moyses Bravin, Luis Gustavo Modelli de Andrade
INTRODUCTION: Venous thrombosis is a serious surgical complication that frequently results in loss of kidney graft. CASE PRESENTATION: We report the case of a female patient recipient of a decease kidney transplant that in the tenth postoperative presented with hematuria, graft pain and oliguria. Ultrasound examination was suggestive of venous thrombosis with abnormal doppler waveform pattern and reversal of diastolic flow. She underwent emergency surgical intervention after 2h of diagnosis...
May 19, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28550777/disolved-organic-matter-dom-removal-from-bio-treated-coking-wastewate-using-a-new-polymeric-adsorbent-modified-with-dimethylamino-groups
#6
Wenlan Yang, Chengda He, Xiaozhi Wang, Ya Zhang, Zhipeng Cheng, Benlin Dai, Lili Zhang
In the current study a new recyclable aminated hyper-cross-linked polymeric adsorbent (A-HPA) was prepared for effective removal of DOM from BTCW. Possibly benefited from its unique structure of polystyrene matrix, sufficient aminated groups and high specific surface area, A-HPA could remove DOM from BTCW through the synergetic effect of π-π interactions, acid-base interactions and micropore filling, and exhibited the highest removal efficiency than the other adsorbents. Moreover, the exhausted A-HPA was amenable to effective regeneration by using acid and alkaline solution, allowing for repeated use with a constant removal efficiency...
May 18, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28550768/photochemical-studies-of-cis-ru-bpy-2-4-bzpy-co-pf6-2-and-cis-ru-bpy-2-4-bzpy-cl-pf6-blue-light-induced-nucleobase-binding
#7
Aurideia P de Sousa, Edinilton M Carvalho, Javier Ellena, Eduardo H S Sousa, Jackson R de Sousa, Luiz G F Lopes, Peter C Ford, Alda K M Holanda
The ruthenium(II) compounds cis-[Ru(bpy)2(4-bzpy)(CO)](PF6)2 (I) and cis-[Ru(bpy)2(4-bzpy)(Cl)](PF6) (II) (4-bzpy=4-benzoylpyridine, bpy=2,2'-bipyridine) were synthesized and characterized by spectroscopic and electrochemical techniques. The crystal structure of II was determined by X-ray diffraction. The photochemical behavior of I in aqueous solution shows that irradiation with ultraviolet light (365nm) releases both CO and 4-bzpy leading to the formation of the cis-[Ru(bpy)2(H2O)2](2+) ion as identified by NMR and electronic spectroscopy...
May 15, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28550764/mechanical-properties-of-crossed-lamellar-structures-in-biological-shells-a-review
#8
REVIEW
X W Li, H M Ji, W Yang, G P Zhang, D L Chen
The self-fabrication of materials in nature offers an alternate and powerful solution towards the grand challenge of designing advanced structural materials, where strength and toughness are always mutually exclusive. Crossed-lamellar structures are the most common microstructures in mollusks that are composed of aragonites and a small amount of organic materials. Such a distinctive composite structure has a fracture toughness being much higher than that of pure carbonate mineral. These structures exhibiting complex hierarchical microarchitectures that span several sub-level lamellae from microscale down to nanoscale, can be grouped into two types, i...
May 17, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28550737/activated-carbon-from-sugarcane-bagasse-ash-for-melanoidins-recovery
#9
A Kaushik, S Basu, K Singh, V S Batra, M Balakrishnan
This work investigates the value added utilization of two sugar-distillery wastes: (i) melanoidins, which are complex Maillard reaction products in molasses distillery wastewater, and (ii) unburnt carbon in sugarcane bagasse ash. Activated unburnt carbon (AUC), prepared by deashing and steam activation, had properties comparable to commercial activated carbon (CAC). Both carbons are suitable for melanoidins adsorption followed by desorption using 25% pyridine solution. For AUC, the equilibrium adsorption data is well described by Langmuir isotherm up to 35 °C while Freundlich model fits better at higher temperature...
May 24, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28550728/quantification-of-nitrous-oxide-in-wastewater-based-on-salt-induced-stripping
#10
Pascal Kosse, Manfred Lübken, Torsten C Schmidt, Marc Wichern
Monitoring nitrous oxide (N2O) emissions from wastewater treatment plants has attracted much attention in recent years demanding accurate and rapid quantification methods. In the present study a salt-assisted methodology is proposed by which N2O is chemically stripped out from wastewater and quantified by gas chromatography (GC-TCD) subsequently. Eight different inorganic salts have been evaluated for this purpose, likewise the application of ultrasound. By addition of sodium bromide (NaBr) the best recovery rate of about 98% (=1...
May 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28550720/development-and-validation-of-an-uplc-uv-method-for-determination-of-a-novel-triazine-coccidiostat-ethanamizuril-and-its-metabolite-m3-in-chicken-tissues
#11
Xiao Zhao, Youfa Xu, Lifang Zhang, Chunmei Wang, Chunna Guo, Chenzhong Fei, Keyu Zhang, Xiaoyang Wang, Yingchun Liu, Mi Wang, Wenli Zheng, Feiqun Xue
Ethanamizuril (EZL) is a novel anti-coccidial triazine synthesized by the Shanghai Veterinary Research Institute of the Chinese Academy of Agricultural Sciences. As a novel coccidiostat, it is essential to study its residue in food animal tissues. In this study, a reliable UPLC method for the determination of ethanamizuril (EZL) and one of its metabolites (M3) in chicken muscle, skin and fat, liver, and kidney samples was developed. Analytes were extracted using acetonitrile and 10% sodium carbonate solution, defatted by n-hexane, and further purified by using an Oasis MCX cartridge...
May 11, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28550706/st-michael-s-improvement-program-a-collaborative-approach-to-sustainable-cost-savings
#12
Anne Trafford, Danielle Jane
In response to a challenging financial environment and increasing patient demand, St. Michael's Hospital needed to find long-term sustainable solutions to continue to provide high-quality patient care and invest in key priorities. By conducting Operational Reviews in focused areas, the hospital achieved $7.4 million of in-year savings in the first year, found standardizations, process efficiencies and direct cost savings that positioned itself for success in future funding models. Initiatives were grounded in evidence and relied heavily on the effective execution by the leadership, front-line staff and physicians...
2017: Healthcare Quarterly
https://www.readbyqxmd.com/read/28550633/the-efficiency-of-the-multi-walled-carbon-nanotubes-used-for-antibiotics-removal-from-wastewaters-generated-by-animal-farms
#13
Maria-Loredana Soran, Ocsana Opriş, Ildikó Lung, Irina Kacso, Alin S Porav, Manuela Stan
In the recent years, residual antibiotics are considered to be emerging environmental pollutants due to their continuous input and persistence into the aquatic ecosystem even at low concentrations. Therefore, these are necessary to develop efficient methods for the wastewater treatment. The present paper describes the efficiency of several types of multi-walled carbon nanotubes (MWCNTs) for the retention of the selected antibiotics (ampicillin, ceftazidime, cefepime, imipenem, piperacillin, tazobactam, tetracycline, erythromycin, ciprofloxacin, norfloxacin, vancomycin, gentamicin, sulfamethoxazole, and thrimetoprim) from aqueous (synthetic) solutions and wastewater samples...
May 27, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28550602/optimizing-the-modification-of-wood-waste-biochar-via-metal-oxides-to-remove-and-recover-phosphate-from-human-urine
#14
Kangning Xu, Chuke Zhang, Xiaomin Dou, Weifang Ma, Chengwen Wang
The recovery of phosphate from human urine has been considered as one of the most attractive benefits of urine source separation because P is an essential but limited macronutrient. This study investigated the approach to modify wood waste biochar via metal oxides aiming to recover phosphate from human urine to produce a value-added biochar. Results showed the phosphate removal ability was enhanced for the modified biochar pre-treated in modification solutions of MgCl2, AlCl3, CaCl2 and FeCl3, respectively, while natural biochar released phosphate to urine...
May 26, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28550600/adsorption-antagonism-and-synergy-of-arsenate-v-and-cadmium-ii-onto-fe-modified-rice-straw-biochars
#15
Youchi Zhang, Jiajun Fan, Minglai Fu, Yong Sik Ok, Yanwei Hou, Chao Cai
Arsenic-containing water poses a serious threat to human health. In this study, two types of Fe-modified rice straw biochars [(Fe-impregnated biochar (FeIm char) and pre-modified rice straw biochar (PMRS char)] were prepared, in which three ratios [1, 5, and 10% (w/w)] of Fe modification were evaluated, resulting in six different Fe-modified biochars. Then, a series of adsorption experiments, using single- and binary-metal solutions of As(V) and Cd(II), were conducted to investigate the performances of modified biochars on metal adsorption compared to pristine rice straw biochar (RS char)...
May 26, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28550456/what-doesn-t-work-for-whom-exploring-heterogeneity-in-responsiveness-to-the-family-check-up-in-early-childhood-using-a-mixture-model-approach
#16
William E Pelham, Thomas J Dishion, Jenn-Yun Tein, Daniel S Shaw, Melvin N Wilson
This study applied latent class analysis to a family-centered prevention trial in early childhood to identify subgroups of families with differential responsiveness to the Family Check-Up (FCU) intervention. The sample included 731 families with 2-year-olds randomized to the FCU or control condition and followed through age 5 with yearly follow-up assessments. A two-step mixture model was used to examine whether specific constellations of family characteristics at age 2 (baseline) were related to intervention response across ages 3, 4, and 5...
May 27, 2017: Prevention Science: the Official Journal of the Society for Prevention Research
https://www.readbyqxmd.com/read/28550375/exploring-inductive-linearization-for-pharmacokinetic-pharmacodynamic-systems-of-nonlinear-ordinary-differential-equations
#17
Chihiro Hasegawa, Stephen B Duffull
Pharmacokinetic-pharmacodynamic systems are often expressed with nonlinear ordinary differential equations (ODEs). While there are numerous methods to solve such ODEs these methods generally rely on time-stepping solutions (e.g. Runge-Kutta) which need to be matched to the characteristics of the problem at hand. The primary aim of this study was to explore the performance of an inductive approximation which iteratively converts nonlinear ODEs to linear time-varying systems which can then be solved algebraically or numerically...
May 26, 2017: Journal of Pharmacokinetics and Pharmacodynamics
https://www.readbyqxmd.com/read/28550340/heat-and-bleach-a-cost-efficient-method-for-extracting-microplastics-from-return-activated-sludge
#18
Surya Sujathan, Ann-Kathrin Kniggendorf, Arun Kumar, Bernhard Roth, Karl-Heinz Rosenwinkel, Regina Nogueira
The extraction of plastic microparticles, so-called microplastics, from sludge is a challenging task due to the complex, highly organic material often interspersed with other benign microparticles. The current procedures for microplastic extraction from sludge are time consuming and require expensive reagents for density separation as well as large volumes of oxidizing agents for organic removal, often resulting in tiny sample sizes and thus a disproportional risk of sample bias. In this work, we present an improved extraction method tested on return activated sludge (RAS)...
May 26, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28550289/heat-transfer-enhancement-in-free-convection-flow-of-cnts-maxwell-nanofluids-with-four-different-types-of-molecular-liquids
#19
Sidra Aman, Ilyas Khan, Zulkhibri Ismail, Mohd Zuki Salleh, Qasem M Al-Mdallal
This article investigates heat transfer enhancement in free convection flow of Maxwell nanofluids with carbon nanotubes (CNTs) over a vertically static plate with constant wall temperature. Two kinds of CNTs i.e. single walls carbon nanotubes (SWCNTs) and multiple walls carbon nanotubes (MWCNTs) are suspended in four different types of base liquids (Kerosene oil, Engine oil, water and ethylene glycol). Kerosene oil-based nanofluids are given a special consideration due to their higher thermal conductivities, unique properties and applications...
May 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28550254/precuneus-failures-in-subjects-of-the-psen1-e280a-family-at-risk-of-developing-alzheimer-s-disease-detected-using-quantitative-electroencephalography
#20
John Fredy Ochoa, Joan Francesc Alonso, Jon Edinson Duque, Carlos Andrés Tobón, Ana Baena, Francisco Lopera, Miguel Angel Mañanas, Alher Mauricio Hernández
BACKGROUND: Presenilin-1 (PSEN1) mutations are the most common cause of familial early onset Alzheimer's disease (AD). The PSEN1 E280A (E280A) mutation has an autosomal dominant inheritance and is involved in the production of amyloid-β. The largest family group of carriers with E280A mutation is found in Antioquia, Colombia. The study of mutation carriers provides a unique opportunity to identify brain changes in stages previous to AD. Electroencephalography (EEG) is a low cost and minimally invasiveness technique that enables the following of brain changes in AD...
May 26, 2017: Journal of Alzheimer's Disease: JAD
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