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https://www.readbyqxmd.com/read/28346902/in-situ-synthesis-of-cobalt-ferrites-embedded-hollow-n-doped-carbon-as-an-outstanding-catalyst-for-elimination-of-organic-pollutants
#1
Tao Zeng, Mingdong Yu, Haiyan Zhang, Zhiqiao He, Xiaole Zhang, Jianmeng Chen, Shuang Song
Using polydopamine-metal ions complex as precursor, hollow mesoporous N-doped carbon microspheres encapsulating spinel ferrites nanocrystals (HM-NC/CoFe2O4) were facilely prepared with the aim of creating a novel heterogeneous catalyst for sulfate radical-based oxidation of organic contaminants. The surface morphology, structure and composition of HM-NC/CoFe2O4 catalyst were thoroughly investigated. The applicability of the catalyst was systematically assessed through numerous controlled trials, several operating parameters, as well as different model pollutants by means of peroxymonosulfate (PMS) activation...
March 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28346724/acclimation-of-bloom-forming-and-perennial-seaweeds-to-elevated-pco2-conserved-across-levels-of-environmental-complexity
#2
Dong Xu, C-Elisa Schaum, Fan Lin, Ke Sun, James R Munroe, Xiao W Zhang, Xiao Fan, Lin H Teng, Yi T Wang, Zhi Z Zhuang, Nai H Ye
Macroalgae contribute approximately 15% of the primary productivity in coastal marine ecosystems, fix up to 27.4 Tg of carbon per year, and provide important structural components for life in coastal waters. Despite this ecological and commercial importance, direct measurements and comparisons of the short-term responses to elevated pCO2 in seaweeds with different life-history strategies are scarce. Here, we cultured several seaweed species (bloom-forming/non-bloom-forming/perennial/annual) in the laboratory, in tanks in an in-door mesocosm facility, and in coastal mesocosms under pCO2 levels ranging from 400 μatm to 2000 μatm...
March 27, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28346497/determinants-of-infant-nutritional-status-in-dabat-district-north-gondar-ethiopia-a-case-control-study
#3
Amarech Asratie Wubante
BACKGROUND: Malnutrition is the top cause of global burden of disease, disability and mortality among infants. Over two-thirds of deaths of children globally occur during the first year of life (infancy). Malnutrition among infants is substantially high in Ethiopia. Therefore, this study is aimed to assess determinants of infant nutritional status. METHODS: A community based nested case-control study was conducted from February to June 2013 in Dabat district. A total of 80 cases and 320 controls (1:4 ratios) were studied...
2017: PloS One
https://www.readbyqxmd.com/read/28346343/lifetime-exposure-to-a-constant-environment-amplifies-the-impact-of-a-fructose-rich-diet-on-glucose-homeostasis-during-pregnancy
#4
Aleida Song, Stuart Astbury, Abha Hoedl, Brent Nielsen, Michael E Symonds, Rhonda C Bell
The need to refine rodent models of human-related disease is now being recognized, in particular the rearing environment that can profoundly modulate metabolic regulation. Most studies on pregnancy and fetal development purchase and transport young females into the research facility, which after a short period of acclimation are investigated (Gen0). We demonstrate that female offspring (Gen1) show an exaggerated hyperinsulinemic response to pregnancy when fed a standard diet and with high fructose intake, which continues throughout pregnancy...
March 25, 2017: Nutrients
https://www.readbyqxmd.com/read/28346203/u-s-food-and-drug-administration-inspections-guide-to-a-successful-outcome-for-503a-sterile-compounding-pharmacies
#5
Doug Yoch
The reasons for which pharmaceutical compounding is the focus of intense state and federal scrutiny are now well known. Compounders are faced with an ever-increasing need to prove, by objective standards, the safety, purity, and potency of the formulations they dispense. They must also demonstrate their compliance with regulations often based on current good compounding practices designed for the pharmaceutical industry. In the U.S. today, rigorous unannounced state and federal inspections of compounding facilities are occurring more and more frequently...
March 2017: International Journal of Pharmaceutical Compounding
https://www.readbyqxmd.com/read/28345888/influence-of-ring-strain-and-bond-polarization-on-the-ring-expansion-of-phosphorus-homocycles
#6
Saurabh S Chitnis, Rebecca A Musgrave, Hazel A Sparkes, Natalie E Pridmore, Vincent T Annibale, Ian Manners
Heterolytic cleavage of homoatomic bonds is a challenge, as it requires separation of opposite charges. Even highly strained homoatomic rings (e.g., cyclopropane and cyclobutane) are kinetically stable and do not react with nucleophiles or electrophiles. In contrast, cycloalkanes bearing electron-donating/withdrawing substituents on adjacent carbons have polarized C-C bonds and undergo numerous heterolytic ring-opening and expansion reactions. Here we show that upon electrophile activation phosphorus homocycles exhibit analogous reactivity, which is modulated by the amount of ring strain and extent of bond polarization...
March 27, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28345885/synthesis-of-highly-uniform-and-compact-lithium-zinc-ferrite-ceramics-via-an-efficient-low-temperature-approach
#7
Fang Xu, Yulong Liao, Dainan Zhang, Tingchuan Zhou, Jie Li, Gongwen Gan, Huaiwu Zhang
LiZn ferrite ceramics with high saturation magnetization (4πMs) and low ferromagnetic resonance line widths (ΔH) represent a very critical class of material for microwave ferrite devices. Many existing approaches emphasize promotion of the grain growth (average size is 10-50 μm) of ferrite ceramics to improve the gyromagnetic properties at relatively low sintering temperatures. This paper describes a new strategy for obtaining uniform and compact LiZn ferrite ceramics (average grains size is ∼2 μm) with enhanced magnetic performance by suppressing grain growth in great detail...
March 27, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28345855/surface-modification-of-na3v2-po4-3-by-nitrogen-and-sulfur-dual-doped-carbon-layer-with-advanced-sodium-storage-property
#8
Xinghui Liang, Xing Ou, Fenghua Zheng, Qichang Pan, Xunhui Xiong, Renzong Hu, Chenghao Yang, Meilin Liu
Nitrogen and sulfur dual-doped carbon layer wrapped Na3V2(PO4)3 nanoparticles (NVP@NSC) have been successfully fabricated by a facile solid-state method. In this hierarchical structure, the Na3V2(PO4)3 nanoparticles are well dispersed and closely coated by nitrogen and sulfur dual-doped carbon layer, constructing an effective and interconnected conducting network to reduce the internal resistance. Furthermore, the uniform coating layers alleviate the agglomeration of Na3V2(PO4)3, as well as mitigate the side reaction between electrode and electrolyte...
March 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28345782/red-cell-distribution-width-as-a-novel-predictor-of-postoperative-respiratory-adverse-events-after-adenotonsillectomy
#9
Betul Kozanhan, Mehmet S Iyisoy
BACKGROUND: Respiratory adverse events are commonly observed after adenotonsillectomy in children with sleep-disordered breathing. Preoperative prediction of these events enhances quality of care and resource management in facilities while encouraging precautions against them. Red cell distribution width, a measure of erythrocyte size variability, has recently been linked to adverse outcomes in a variety of disorders. Red cell distribution width has also been found to be associated with severity of obstructive sleep apnea in adults due to hypoxia-mediated inflammation...
March 27, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28345742/a-qualitative-exploration-of-chronic-pain-and-opioid-treatment-among-hiv-patients-with-drug-use-disorders
#10
Sarina R Isenberg, Allysha C Maragh-Bass, Kathleen Ridgeway, Mary C Beach, Amy R Knowlton
OBJECTIVE: The study explored high-risk participants' experiences with pain management regarding clinical access to and use of prescription opioids. DESIGN: Qualitative semistructured interviews and focus groups. SETTING: Data were collected August 2014 to May 2015 at an urban community-based research facility in Baltimore City, MD. PARTICIPANTS: HIV participants with chronic pain and a history of illicit drug use. METHODS: Qualitative coding and analysis used an iterative, inductive, and thematic approach and coders achieved inter-coder consistency...
January 2017: Journal of Opioid Management
https://www.readbyqxmd.com/read/28345711/metal-free-synthesis-of-2-aminonaphthalenes-by-intramolecular-transannulation-of-1-sulfonyl-4-2-alkenylphenyl-1-2-3-triazoles
#11
Ze-Feng Xu, Xing Yu, Dongdong Yang, Chuan-Ying Li
A facile metal-free synthesis of naphthalenes by intramolecular transannulation of 1-sulfonyl-4-(2-alkenylphenyl)-1,2,3-triazoles was realized. The in situ formed ketenimine was proposed as the key intermediate, and the desired 2-aminonaphthalenes were generated in up to 87% yield in refluxing 1,2-dichloroethane without any catalyst or additive.
March 27, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28345631/structure-of-the-cyanuric-acid-hydrolase-trzd-reveals-product-exit-channel
#12
Asim K Bera, Kelly G Aukema, Mikael Elias, Lawrence P Wackett
Cyanuric acid hydrolases are of industrial importance because of their use in aquatic recreational facilities to remove cyanuric acid, a stabilizer for the chlorine. Degradation of excess cyanuric acid is necessary to maintain chlorine disinfection in the waters. Cyanuric acid hydrolase opens the cyanuric acid ring hydrolytically and subsequent decarboxylation produces carbon dioxide and biuret. In the present study, we report the X-ray structure of TrzD, a cyanuric acid hydrolase from Acidovorax citrulli. The crystal structure at 2...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28345612/wafer-scale-fabrication-of-non-polar-mesoporous-gan-distributed-bragg-reflectors-via-electrochemical-porosification
#13
Tongtong Zhu, Yingjun Liu, Tao Ding, Wai Yuen Fu, John Jarman, Christopher Xiang Ren, R Vasant Kumar, Rachel A Oliver
Distributed Bragg reflectors (DBRs) are essential components for the development of optoelectronic devices. For many device applications, it is highly desirable to achieve not only high reflectivity and low absorption, but also good conductivity to allow effective electrical injection of charges. Here, we demonstrate the wafer-scale fabrication of highly reflective and conductive non-polar gallium nitride (GaN) DBRs, consisting of perfectly lattice-matched non-polar (11-20) GaN and mesoporous GaN layers that are obtained by a facile one-step electrochemical etching method without any extra processing steps...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28345565/upgradation-and-modernization-of-eye-banking-services-integrating-tradition-with-innovative-policies-and-current-best-practices
#14
Radhika Tandon, Archita Singh, Noopur Gupta, M Vanathi, Vivek Gupta
PURPOSE: The purpose of this study is to review the history and evolution of the National Eye Bank (NEB) and analyze the impact over the years and report the outcome of the invested resources. METHODS: Review of archival material, records, project reports, policy and procedures' manuals, and publications was done. Descriptive and analytical processing of data obtained was undertaken. Parameters evaluated included total collection, transplantation, utilization rates of donor cornea, changing trends over time in terms of numbers and duration of recipients waiting, impactful research translated into changes in standard operating protocols, new facilities, and subsequent effects on numbers or quality assurance measures and overview of major achievements...
February 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28345431/collaterals-2016-translating-the-collaterome-around-the-globe
#15
David S Liebeskind, Graham W Woolf, Ashfaq Shuaib
Collaterals 2016 (third International Symposium on Collaterals to the Brain) was a multidisciplinary scientific conference focused on collateral circulation in acute ischemic stroke. Decisive challenges include generalizability of optimal triage and selection paradigms based on collateral status for definitive treatment of acute ischemic stroke, rapid dissemination of expert methods, and the urgent need to leverage networking opportunities for stroke science related to the hemodynamics of collaterals. The collaterome, or individual capacity to offset ischemia in the brain, and determination of a favorable collateral profile have become pivotal factors in consideration of the precision medicine of stroke decision-making...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28345398/challenges-in-the-surgical-management-of-ectopic-pregnancy-in-a-low-resource-setting-mpilo-central-hospital-bulawayo-zimbabwe
#16
Solwayo Ngwenya
Background Ectopic pregnancy contributes to maternal morbidity and mortality, especially in low-resourced countries with limited facilities for early diagnosis and treatment. It is a very challenging condition to diagnose. Patients may collapse and die while undergoing investigation. Aims To assess surgical treatment given to patients presenting at Mpilo Central Hospital, the challenges that are faced and the outcomes; and also to document how women survive this dangerous condition in a setting challenged by low resources...
January 1, 2017: Tropical Doctor
https://www.readbyqxmd.com/read/28345381/comparison-of-fenton-s-reagent-and-adsorption-for-treatment-of-industrial-container-and-drum-cleaning-industry-wastewater
#17
Elçin Güneş, Deniz İzlen Çifçi, Suna Özden Çelik
The present study is aimed to explore the characterization of Industrial Container and Drum Cleaning (ICDC) industry wastewater and treatment alternatives of this wastewater using Fenton and adsorption processes. Wastewater derived from ICDC industry is usually treated by chemical coagulation and biological treatment in Turkey and then discharged in a centralized wastewater treatment facility. It is required that the wastewater COD is below 1500 mg/L to treat in a centralized wastewater treatment facility The wastewater samples characterized for parameters of pH, conductivity, COD, BOD5, TSS, NH3-N, TN, TOC, TP, Cd, Cr, Cu, Fe, Ni, Pb, Zn, Hg...
March 27, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28345352/metal-free-photoinduced-electron-transfer-atom-transfer-radical-polymerization-integrated-with-bio-inspired-polydopamine-chemistry-as-a-green-strategy-for-surface-engineering-of-magnetic-nanoparticles
#18
Yang Yang, Xuegang Liu, Gang Ye, Shan Zhu, Zhe Wang, Xiaomei Huo, Krzysztof Matyjaszewski, Yuexiang Lu, Jing Chen
Developing green and efficient technologies for surface modification of magnetic nanoparticles (MNPs) is of crucial importance for their biomedical and environmental applications. This study reports, for the first time, a novel strategy by integrating metal-free photoinduced electron transfer-atom transfer radical polymerization (PET-ATRP) with the bio-inspired polydopamine (PDA) chemistry for controlled architecture of functional polymer brushes from MNPs. Conformal PDA encapsulation layers were initially generated on the surfaces of MNPs, which served as the protective shells while providing an ideal platform for tethering 2-bromo-2-phenylacetic acid (BPA), a highly efficient initiator...
March 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28345338/study-of-arylamine-substituted-porphyrins-as-hole-transporting-materials-in-high-performance-perovskite-solar-cells
#19
Song Chen, Peng Liu, Yong Hua, Yuanyuan Li, Lars Kloo, Xingzhu Wang, Beng S Ong, Wai-Kwok Wong, Xunjin Zhu
To develop new hole transporting materials (HTMs) for efficient and stable perovskite solar cells (PSCs), 5,10,15,20-tetrakis{4-[N,N-di(4-methoxylphenyl)amino-phenyl]}- porphyrin has been prepared in gram scale through the direct condensation of pyrrole and 4-[bis(4-methoxyphenyl)amino]benzaldehyde. Its Zn(II) and Cu(II) complexes exhibit excellent thermal and electrochemical stability, specifically, high hole mobility and very favorable energetics for hole extraction that render them a new class of HTMs in organometallic halide perovskite solar cells (PSCs)...
March 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28345296/boosting-the-energy-density-of-carbon-based-aqueous-supercapacitors-by-optimizing-the-surface-charge
#20
Minghao Yu, Dun Lin, Haobin Feng, Yinxiang Zeng, Yexiang Tong, Xihong Lu
The voltage of carbon-based aqueous supercapacitors is limited by the water splitting reaction occurring in one electrode, generally resulting in the promising but unused potential range of the other electrode. Exploiting this unused potential range provides the possibility for further boosting their energy density. An efficient surface charge control strategy was developed to remarkably enhance the energy density of multiscale porous carbon (MSPC) based aqueous symmetric supercapacitors (SSCs) by controllably tuning the operating potential range of MSPC electrodes...
March 27, 2017: Angewandte Chemie
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