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https://www.readbyqxmd.com/read/28651052/inhomogeneity-in-ethylammonium-nitrate-acetonitrile-binary-mixtures-part-i-the-highest-low-q-excess-so-far-reported
#1
Alessandro Mariani, Ruggero Caminiti, Fabio Ramondo, Giovanna Salvitti, Francesca Mocci, Lorenzo Gontrani
The binary mixtures of the ionic liquid ethylammonium nitrate with acetonitrile have been studied by means of Wide and Small Angle X-ray Scattering and via two different computational methods, namely classical molecular dynamics and DFT. Our results show how the local arrangement is directly linked to the long-range structure. Moreover, we found once again a similarity in the physicochemical behaviour of ethylammonium nitrate and water.
June 26, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28650572/cloning-and-characterization-of-nitrate-reductase-gene-in-ulva-prolifera-ulvophyceae-chlorophyta
#2
Yang Guo, Hao Zhe Wang, Chun Hui Wu, Hui Hui Fu, Peng Jiang
Ulva spp. dominates green tides around the world, which are occurring at an accelerated rate. The competitive nitrogen assimilation efficiency in Ulva is suggested to result in ecological success against other seaweeds. However, molecular characterization of genes involved in nitrogen assimilation have not been conducted. Here, we describe the identification of the nitrate reductase (NR) gene from a green seaweed Ulva prolifera, an alga which is responsible for the world's largest green tide in the Yellow Sea...
June 26, 2017: Journal of Phycology
https://www.readbyqxmd.com/read/28650448/transplant-associated-thrombotic-microangiopathy-is-an-endothelial-complication-associated-with-refractoriness-of-acute-gvhd
#3
M Zeisbrich, N Becker, A Benner, A Radujkovic, K Schmitt, J Beimler, A D Ho, M Zeier, P Dreger, T Luft
There is increasing evidence that endothelial dysfunction is involved in refractoriness of acute GvHD (aGvHD). Here we investigated the hypothesis that another endothelial complication, transplant-associated thrombotic microangiopathy (TMA), contributes to the pathogenesis of aGvHD refractoriness. TMA was retrospectively assessed in 771 patients after allogeneic stem cell transplantation (alloSCT). Incidences of TMA and refractory aGvHD were correlated with biomarkers of endothelial damage obtained before alloSCT for patients receiving or not receiving statin-based endothelial prophylaxis (SEP)...
June 26, 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28650040/synthesis-functionalisation-and-post-synthetic-modification-of-bismuth-metal-organic-frameworks
#4
M Köppen, O Beyer, S Wuttke, U Lüning, N Stock
Two new bismuth metal-organic frameworks (Bi-MOFs) were discovered using high throughput experiments employing bismuth(iii) nitrate pentahydrate and triazine-2,4,6-triyl-tribenzoic acid (H3TATB). The reaction was carried out for long reaction times (∼5 d) in a water/DMF-mixture and resulted in the formation of [Bi2(O)(OH)(TATB)]·H2O (denoted as CAU-35). By switching to short reaction times and a methanol/DMF-mixture as the solvent, an analogue of CAU-7-BTB with the composition [Bi(TATB)]·DMF·6H2O (denoted as CAU-7-TATB) was obtained...
June 26, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28649843/pb-pb8-basket-like-cluster-based-lead-tellurate-nitrate-kleinman-forbidden-nonlinear-optical-crystal-pb9te2o13-oh-no3-3
#5
Yi-Gang Chen, Nan Yang, Xing-Xing Jiang, Yao Guo, Xian-Ming Zhang
The first lead tellurate-nitrate nonlinear-optical (NLO) crystal, Pb9Te2O13(OH)(NO3)3, featuring a 3D anionic diamondlike toplogical structural motif formulated as [Pb9O13](8-) constructed by unique nonanuclear basket-shaped Pb@Pb8O14 clusters has been hydrothermally achieved, in which the Pb@Pb8O14 cluster shows a core-shell structure with one PbO10 polyhedron enclosed by eight PbOx (x = 3 and 4) polyhedera via edge and face sharing. The hexavalent Te in TeO5(OH) octahedra is linked to a [Pb9O13](8-) cluster to form a rare [Pb9Te2O13(OH)](3+) cationic framework...
June 26, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28649840/reaction-of-a-nitrosyl-complex-of-cobalt-porphyrin-with-hydrogen-peroxide-putative-formation-of-peroxynitrite-intermediate
#6
Soumen Saha, Kuldeep Gogoi, Baishakhi Mondal, Somnath Ghosh, Hemanta Deka, Biplab Mondal
The cobalt porphyrin complex [(Cl4TPP)Co], 1, {Cl4TPP = 5,10,15,20-tetrakis(4'-chlorophenyl)porphyrinate dianion} in dichloromethane solution was subjected to react with nitric oxide (NO) gas and resulted in the formation of the corresponding nitrosyl complex [(Cl4TPP)Co(NO)], 2, having {CoNO}(8) description. It was characterized by spectroscopic studies and single-crystal X-ray structure determination. It did not react with dioxygen. However, in CH2Cl2/CH3CN solution, it reacted with H2O2 to result in the Co-nitrito complex [(Cl4TPP)Co(NO2)], 3, with the simultaneous release of O2...
June 26, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28649414/characterisation-and-comparison-of-bacterial-communities-on-reverse-osmosis-membranes-of-a-full-scale-desalination-plant-by-bacterial-16s-rrna-gene-metabarcoding
#7
Veena Nagaraj, Lucy Skillman, Goen Ho, Dan Li, Alexander Gofton
Microbiomes of full-scale seawater reverse osmosis membranes are complex and subject to variation within and between membrane units. The pre-existing bacterial communities of unused membranes before operation have been largely ignored in biofouling studies. This study is novel as unused membranes were used as a critical benchmark for comparison. Fouled seawater reverse osmosis membrane biofilm communities from an array of autopsied membrane samples, following a 7-year operational life-span in a full-scale desalination plant in Western Australia, were characterised by 16S rRNA gene metabarcoding using the bacterial primers 515F and 806R...
2017: NPJ Biofilms and Microbiomes
https://www.readbyqxmd.com/read/28649367/nitric-oxide-signalling-and-neuronal-nitric-oxide-synthase-in-the-heart-under-stress
#8
REVIEW
Yin Hua Zhang
Nitric oxide (NO) is an imperative regulator of the cardiovascular system and is a critical mechanism in preventing the pathogenesis and progression of the diseased heart. The scenario of bioavailable NO in the myocardium is complex: 1) NO is derived from both endogenous NO synthases (endothelial, neuronal, and/or inducible NOSs [eNOS, nNOS, and/or iNOS]) and exogenous sources (entero-salivary NO pathway) and the amount of NO from exogenous sources varies significantly; 2) NOSs are located at discrete compartments of cardiac myocytes and are regulated by distinctive mechanisms under stress; 3) NO regulates diverse target proteins through different modes of post-transcriptional modification (soluble guanylate cyclase [sGC]/cyclic guanosine monophosphate [cGMP]/protein kinase G [PKG]-dependent phosphorylation, S-nitrosylation, and transnitrosylation); 4) the downstream effectors of NO are multidimensional and vary from ion channels in the plasma membrane to signalling proteins and enzymes in the mitochondria, cytosol, nucleus, and myofilament; 5) NOS produces several radicals in addition to NO (e...
2017: F1000Research
https://www.readbyqxmd.com/read/28649204/effects-of-dietary-nitrate-supplementation-on-physiological-responses-cognitive-function-and-exercise-performance-at-moderate-and-very-high-simulated-altitude
#9
Oliver M Shannon, Lauren Duckworth, Matthew J Barlow, Kevin Deighton, Jamie Matu, Emily L Williams, David Woods, Long Xie, Blossom C M Stephan, Mario Siervo, John P O'Hara
Purpose: Nitric oxide (NO) bioavailability is reduced during acute altitude exposure, contributing toward the decline in physiological and cognitive function in this environment. This study evaluated the effects of nitrate ([Formula: see text]) supplementation on NO bioavailability, physiological and cognitive function, and exercise performance at moderate and very-high simulated altitude. Methods:Ten males (mean (SD): [Formula: see text]: 60.9 (10.1) ml·kg(-1)·min(-1)) rested and performed exercise twice at moderate (~14...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28649029/determination-of-chemical-oxygen-demand-cod-using-an-alternative-wet-chemical-method-free-of-mercury-and-dichromate
#10
Marit Kolb, Müfit Bahadir, Burkhard Teichgräber
Worldwide, the standard methods for the determination of the important wastewater parameter chemical oxygen demand (COD) are still based on the use of the hazardous chemicals, mercury sulfate and chromium(VI). However, due to their properties they are meanwhile classified as "priority pollutants" and shall be phased out or banned in the frame of REACH (current European Chemical Law: Registration, Evaluation, Authorization and restriction of Chemicals) by the European Union. Hence, a new wet-chemical method free of mercury and chromium(VI) was developed...
June 13, 2017: Water Research
https://www.readbyqxmd.com/read/28648635/pro-oxidant-pro-inflammatory-alterations-in-the-offspring%C3%A2-s-heart-of-mild-diabetic-rats-are-regulated-by-maternal-treatments-with-a-mitochondrial-antioxidant
#11
Romina Higa, Sabrina L Roberti, Evangelina Capobianco, Daiana Fornes, Verónica White, Alicia Jawerbaum
Maternal diabetes programs metabolic and cardiovascular diseases in the offspring. Here, we demonstrated increased pro-oxidant/pro-inflammatory markers in the heart of 2-day-old offspring of diabetic rats, previous to the induction of metabolic alterations. At a pre-pubertal stage, sex-dependent changes were evidenced in the diabetic group, as only males showed increased glycemia as well as increased lipoperoxidation and concentrations of nitrated proteins, matrix metalloproteinase-9 and peroxisome proliferator activated receptor α (PPARα) in the heart...
June 22, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28648369/water-diversion-projects-negatively-impact-lake-metabolism-a-case-study-in-lake-dazong-china
#12
Xiaolong Yao, Lu Zhang, Yunlin Zhang, Yingyang Du, Xingyu Jiang, Min Li
Water diversion projects are one of the major tools for counteracting water resource shortage in China. Many diversion projects aimed at diverting water from the Yangtze River or other rivers. This study, using one of the lakes receiving Yangtze River water as a case study, illustrated how nutrient, O2, and N2 fluxes across the sediment-water interface (SWI) changed with increasing nitrate loads during in situ benthic chamber incubation. Increasing nitrate loads in the overlying water caused complex changes in the SWI fluxes...
June 22, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28648091/mediators-go-together-high-production-of-cxcl9-cxcl10-ifn-%C3%AE-and-tnf-%C3%AE-in-ham-tsp
#13
Heytor Victor Pereira da Costa Neco, Vanessa Gabryelle da Silva Teixeira, Ana Carolina Lemos da Trindade, Paula Machado Ribeiro Magalhães, Virgínia Maria Barros de Lorena, Lúcio Roberto Cançado Castellano, Joelma Rodrigues de Souza, Luydson Richardson Vasconcelos, Patrícia Muniz Mendes Freire de Moura, Clarice Neuenschwander Lins de Morais
HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP) is a chronic demyelinating and disabling syndrome caused by HTLV-1. Although the pathogenic mechanisms that lead to HAM/TSP outcome have not been elucidated, genetic and immunological factors may be involved in the myelopathy occurrence. The present study aimed to compare cytokines, chemokines and nitric oxide levels in asymptomatic and HAM/TSP HTLV-1 infected patients. The study group consisted of 21 HAM/TSP and 48 asymptomatic HTLV-1 patients...
June 24, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28648059/polyoxometalate-incorporated-metallapillararene-metallacalixarene-metal-organic-frameworks-as-anode-materials-for-lithium-ion-batteries
#14
Xi-Ya Yang, Tao Wei, Ji-Sen Li, Ning Sheng, Pei-Pei Zhu, Jing-Quan Sha, Tong Wang, Ya-Qian Lan
A series of remarkable crystalline compounds containing metallapillararene/metallacalixarene metal-organic frameworks (MOFs), [Ag5(pyttz)3·Cl·(H2O)][H3SiMo12O40]·3H2O (1), [Ag5(trz)6][H5SiMo12O40] (2), [Ag5(trz)6][H5GeMo12O40] (3), and [Ag5(trz)6][H4PW12O40] (4) (pyttz = 3-(pyrid-4-yl)-5-(1H-1,2,4-triazol-3-yl)-1,2,4-triazolyl, trz = 1,2,4-triazole), have been obtained by using a simple one-step hydrothermal reaction of silver nitrate, pyttz for 1 and trz for 2-4, and Keggin type polyoxometalates (POMs)...
June 24, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28647264/mgo-based-adsorbents-for-co2-adsorption-influence-of-structural-and-textural-properties-on-the-co2-adsorption-performance
#15
Gutiérrez-Bonilla Elvira, Granados-Correa Francisco, Sánchez-Mendieta Víctor, Morales-Luckie Raúl Alberto
A series of MgO-based adsorbents were prepared through solution-combustion synthesis and ball-milling process. The prepared MgO-based powders were characterized using X-ray diffraction, scanning electron microscopy, N2 physisorption measurements, and employed as potential adsorbents for CO2 adsorption. The influence of structural and textural properties of these adsorbents over the CO2 adsorption behaviour was also investigated. The results showed that MgO-based products prepared by solution-combustion and ball-milling processes, were highly porous, fluffy, nanocrystalline structures in nature, which are unique physico-chemical properties that significantly contribute to enhance their CO2 adsorption...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28647259/effect-of-current-emission-abatement-strategies-on-air-quality-improvement-in-china-a-case-study-of-baotou-a-typical-industrial-city-in-inner-mongolia
#16
Xionghui Qiu, Lei Duan, Siyi Cai, Qian Yu, Shuxiao Wang, Fahe Chai, Jian Gao, Yanping Li, Zhaoming Xu
The national Air Pollution Prevention and Control Action Plan required significant decreases in PM2.5 levels over China. To explore more effective emission abatement strategies in industrial cities, a case study was conducted in Baotou to evaluate the current national control measures. The total emissions of SO2, NOX, PM2.5 and NMVOC (non-methane volatile organic compounds) in Baotou were 211.2Gg, 156.1Gg, 28.8Gg, and 48.5Gg, respectively in 2013, and they would experience a reduction of 30.4%, 26.6%, 15.1%, and 8...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28647239/fluoride-removal-by-al-ti-and-fe-hydroxides-and-coexisting-ion-effect
#17
Jianfeng Zhang, Timothy E Brutus, Jiemin Cheng, Xiaoguang Meng
Batch experiments were conducted to evaluate fluoride removal by Al, Fe, and Ti-based coagulants and adsorbents, as well as the effects of coexisting ions and formation of aluminum-fluoride complexes on fluoride removal by co-precipitation with alum (Al2(SO4)3·18H2O). Aluminum sulfate was more efficient than the other coagulants for fluoride removal in the pH range between 6 and 8. Nano-crystalline TiO2 was more effective for fluoride removal than Al and Fe hydroxides in a pH range of 3-5. Coexisting anions in water decreased the removal of fluoride in the order: phosphate (2...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28647237/developing-a-chloramine-decay-index-to-understand-nitrification-a-case-study-of-two-chloraminated-drinking-water-distribution-systems
#18
Sina Moradi, Sanly Liu, Christopher W K Chow, John van Leeuwen, David Cook, Mary Drikas, Rose Amal
The management of chloramine decay and the prevention of nitrification are some of the critical issues faced by water utilities that use chloramine as a disinfectant. In this study, potential association between high performance size exclusion chromatography (HPSEC) data obtained with multiple wavelength Ultraviolet (UV) detection from two drinking water distribution systems in Australia and nitrification occurrence was investigated. An increase in the absorbance signal of HPSEC profiles with UV detection at λ=230nm between apparent molecular weights of 200 to 1000Da was observed at sampling sites that experienced rapid chloramine decay and nitrification while its absorbance signal at λ=254nm decreased...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28646438/noctiluca-and-copepods-grazing-on-the-phytoplankton-community-in-a-nutrient-enriched-coastal-environment-along-the-southwest-coast-of-india
#19
N Arunpandi, R Jyothibabu, L Jagadeesan, T R Gireeshkumar, C Karnan, S W A Naqvi
The relative grazing impact of Noctiluca scintillans (hereafter referred only Noctiluca) and copepods (Acrocalanus gracilis, Paracalanus parvus, Acartia danae and Oithona similis) on the phytoplankton community in an upwelling-mudbank environment along the southwest coast India is presented here. This study was carried out during the Pre-Southwest Monsoon (April-May) to the Late Southwest Monsoon (August) period in 2014. During the sampling period, large hydrographical transformation was evident in the study area (off Alappuzha, Southwest coast of India); warmer Pre-Southwest Monsoon water column condition got transformed into cooler and nitrate-rich hypoxic waters during the Southwest Monsoon (June-August) due to intense coastal upwelling...
July 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28645873/generation-of-nitric-oxide-by-olive-olea-europaea-l-pollen-during-in-vitro-germination-and-assessment-of-the-s-nitroso-and-nitro-pollen-proteomes-by-computational-predictive-methods
#20
María José Jimenez-Quesada, Rosario Carmona, Elena Lima-Cabello, José Ángel Traverso, Antonio Jesús Castro, M Gonzalo Claros, Juan de Dios Alché
Nitric oxide is recognized as a signaling molecule involved in a broad range of physiological processes in plants including sexual reproduction. NO has been detected in the pollen grain at high levels and regulates pollen tube growth. Previous studies demonstrated that NO as well as ROS are produced in the olive reproductive tissues in a stage- and tissue-specific manner. The aim of this study was to assess the production of NO throughout the germination of olive (Olea europaea L.) pollen in vitro. The NO fluorescent probe DAF-2DA was used to image NO production in situ, which was correlated to pollen viability...
June 20, 2017: Nitric Oxide: Biology and Chemistry
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