Read by QxMD icon Read


Indresh Kumar Pandey, Mookan Natarajan, Hemlata Faujdar, Firasat Hussain, Matthias Stein, Sandeep Kaur-Ghumaan
The mono-substituted complex [Fe2(CO)5(μ-naphthalene-2-thiolate)2(P(PhOMe-p)3)] was prepared taking after the structural principles from both [NiFe] and [FeFe]-hydrogenase enzymes. Crystal structures are reported for this complex and the all carbonyl analogue. The bridging naphthalene thiolates resemble μ-bridging cysteine amino acids. One of the naphthyl moieties forms π-π stacking interactions with the terminal bulky phosphine ligand in the crystal structure and in calculations. This interaction stabilizes the reduced and protonated forms during electrocatalytic proton reduction in the presence of acetic acid and hinders the rotation of the phosphine ligand...
March 19, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
ChuanYang Cai, ShuangYu Yu, XinYue Li, Yu Liu, Shu Tao, WenXin Liu
Two typical types of electronic waste (E-waste) were selected to investigate the emission characteristics of polycyclic aromatic hydrocarbons (PAHs) during pyrolytic processing, including emission factor, compositional profile, size distribution and gas-particle partitioning. The mean emission factors (EFs) of total PAHs were measured to be 2.77 ± 1.41 μg/g and 23.65 ± 14.52 μg/g for printed wiring boards and plastic casings, respectively, lower than those for coal combustion and biomass burning...
March 9, 2018: Journal of Hazardous Materials
Chuandong Wu, Jiemin Liu, Shihua Liu, Wenhui Li, Luchun Yan, Mushui Shu, Peng Zhao, Peng Zhou, Wenbin Cao
Municipal solid waste (MSW) landfills are a source of odorous and toxic compounds. In this work, we present an integrated assessment of the odor concentration and human health risks of volatile compounds to evaluate the environmental quality at a MSW landfill. Air samples were collected seasonally from six areas of the landfill with different functions. The total concentrations of the compounds ranged from 204.0 to 7426.7 μg m-3 , and the concentrations in temporarily and permanently capped areas were 50...
March 13, 2018: Chemosphere
Lucas W Hernandez, Ulrich Klöckner, Jola Pospech, Lilian Hauss, David Sarlah
We describe the development of an arenophile-mediated, nickel-catalyzed dearomative trans-1,2-carboamination protocol. A range of readily available aromatic compounds was converted to the corresponding dienes using Grignard reagents as nucleophiles. This strategy provided products with exclusive trans-selectivity and high enantioselectivity was observed in case of benzene and naphthalene. The utility of this methodology was showcased by controlled and stereoselective preparation of small, functionalized molecules...
March 15, 2018: Journal of the American Chemical Society
M R Kholghy, G A Kelesidis, S E Pratsinis
Nucleation is an important, yet poorly understood step in soot formation. Here, the importance of reactive PAH dimerization in reducing soot nucleation reversibility is investigated by simulating soot formation in a so-called "nucleation" flame (P. Desgroux et al., Combust. Flame, 2017, 184, 153-166). There, inception of soot particles is prolonged at minimal subsequent growth. With only reversible PAH dimerization, the simulated soot concentration is negligible. Accounting however for PAH chemical bond formation after physical dimerization, stabilizes dimers by covalent bonds and increases the soot concentration by four orders of magnitude, in good agreement with Laser Induced Incandescence measurements...
March 15, 2018: Physical Chemistry Chemical Physics: PCCP
Liqun Xing, Lichao Wang, Rui Zhang
It has become a great habit for driving to work in people's daily life in China. In order to understand the concentration of volatile organic compounds (VOCs) in vehicles and the health risks related to inhalation exposure to VOCs, this study investigated the pollution characteristics and health risks posed by VOCs emitted from interior materials in vehicles. A total of 47 of 62 VOCs were studied, using 23 randomly selected vehicles of different brands in Nanjing city, China. The potential cancer and non-cancer health risks associated with VOC inhalation were assessed based on conventional approaches proposed by the United States Environmental Protection Agency (USEPA)...
March 14, 2018: Environmental Science and Pollution Research International
Zhao Xiaojuan, Leiming Tao, Hao Li, Wenchao Huang, Pengyu Sun, Jun Liu, Shuangshuang Liu, Qiang Sun, Zhifang Cui, Lijie Sun, Yan Shen, Yang Yang, Mingkui Wang
Organic-inorganic hybrid lead halide perovskites have been widely investigated in optoelectronics both experimentally and theoretically. The present work incorporates chemical modified graphene into nanocrystal SnO2 as electron transporting layer (ETL) for highly efficient planar perovskite solar cells. The modification of SnO2 with highly conductive two-dimensional naphthalene diimide-graphene can increase surface hydrophobicity and form van der Waals interaction between the surfactant and the organic-inorganic hybrid lead halide perovskite compounds...
March 14, 2018: Nano Letters
Jie Li, Domenico Bullara, Xuewen Du, Hongjian He, Stavroula Sofou, Ioannis G Kevrekidis, Irving R Epstein, Bing Xu
Recent studies have demonstrated that enzyme-instructed self-assembly (EISA) in extra- or intracellular environments can serve as a multistep process for controlling cell fate. There is little knowledge, however, about the kinetics of EISA in the complex environments in or around cells. Here we design and synthesize three dipeptidic precursors (LD-1-SO3, DL-1-SO3, DD-1-SO3), consisting of diphenylalanine (L-Phe-D-Phe, D-Phe-L-Phe, D-Phe-D-Phe, respectively) as the backbone, which are capped by 2-(naphthalen-2-yl)acetic acid at the N-terminal and by 2-(4-(2-aminoethoxy)-4-oxobutanamido)ethane-1-sulfonic acid at the C- 2 terminal...
March 14, 2018: ACS Nano
Joshua S Elmore, Michael H Baumann
Naphthalen-1-yl-(1-pentylindol-3-yl)methanone (JWH-018) is a synthetic compound found in psychoactive "spice" products that activates cannabinoid receptors. Preclinical evidence suggests that exposure to synthetic cannabinoids increases 5-HT2A/2C receptor function in the brain, an effect which might contribute to psychotic symptoms. Here, we hypothesized that repeated exposures to JWH-018 would enhance behavioral responsiveness to the 5-HT2A/2C receptor agonist DOI. Male Sprague-Dawley rats fitted with subcutaneously (sc) temperature transponders received daily injections of JWH-018 (1...
2018: Frontiers in Psychiatry
Emma V Lampard, Adam C Sedgwick, Xiaolong Sun, Katherine L Filer, Samantha C Hewins, Gyoungmi Kim, Juyoung Yoon, Steven D Bull, Tony D James
In this work, we synthesized a series of boronate ester fluorescence probes ( E )-4,4,5,5-tetramethyl-2-(4-styrylphenyl)-1,3,2-dioxaborolane ( STBPin) , ( E )- N , N -dimethyl-4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)styryl)aniline ( DSTBPin) , ( E )-4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)styryl)benzonitrile ( CSTBPin) , ( E )-2-(4-(4-methoxystyryl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane ( MSTBPin) , ( E )- N , N -dimethyl-4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)styryl)naphthalen-1-amine ( NDSTBPin ), and N , N -dimethyl-4-(2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)oxazol-5-yl)aniline ( DAPOX-BPin ) for the detection of hydrogen peroxide (H2 O2 )...
March 2018: ChemistryOpen
Olga Francisco, Ifeoluwa Idowu, Kelsey L Friesen, Matthew McDougall, Sara Seoin Choi, Patrique Bolluch, Oluwadamilola Daramola, Wesley Johnson, Vince Palace, Jörg Stetefeld, Gregg T Tomy
The efficacy of a lightly cross-linked polymeric bead to absorb polycyclic aromatic hydrocarbons (PAHs) from the surface of fresh- and salt-water in a simulated oil-spill scenario was assessed in this study. A layer of PAHs at the water surface was created by first preparing the PAHs in hexane and then carefully spiking this mixture onto the surface of water. Beads were then applied to the surface of the organic phase and the amount of hydrocarbons absorbed by the beads was examined at prescribed time intervals and at different temperatures...
March 5, 2018: Chemosphere
Divya P Narayanan, Sudha Kochiyil Cherikallinmel, Sugunan Sankaran, Binitha N Narayanan
A one pot synthesis of carbon dot incorporated porous coconut shell char derived sulphonated catalyst is reported here for the first time and is effectively used in the multicomponent synthesis of amidoalkyl naphthol. Macroporous nature of the char is revealed from scanning electron microscopic (SEM) analysis, whereas the dispersion of carbon dots (CDs) on the porous coconut shell char is confirmed from the high resolution transmission electron microscopic (HRTEM) analysis. Fluorescence emission spectrum further confirmed the presence of CDs in the catalyst...
March 6, 2018: Journal of Colloid and Interface Science
Ignacio Funes-Ardoiz, Feliu Maseras
DFT calculations are applied to the study of the oxidative coupling between benzoic acid and 1-phenyl-1-propyne catalyzed by [CpRhCl2]2 using either Cu(OAc)2(H2O) or Ag(OAc) as terminal oxidants, a process that has been experimentally shown to have subtleties related to regioselectivity (placement of the phenyl substituent of the alkyne in the isocoumarin product) and chemoselectivity (isocoumarin or naphthalene derivatives). Calculations reproduce the experimental results, and show the involvement of the oxidant throughout the catalytic cycle...
March 12, 2018: Chemistry: a European Journal
Joris Goetze, Irina Yarulina, Jorge Gascon, Freek Kapteijn, Bert M Weckhuysen
In small-pore zeolite catalysts, where the size of the pores is limited by eight-ring windows, aromatic hydrocarbon pool molecules that are formed inside the zeolite during the Methanol-to-Olefins (MTO) process cannot exit the pores and are retained inside the catalyst. Hydrocarbon species whose size is comparable to the size of the zeolite cage can cause the zeolite lattice to expand during the MTO process. In this work, the formation of retained hydrocarbon pool species during MTO at a reaction temperature of 400 °C was followed using operando UV-vis spectroscopy...
March 2, 2018: ACS Catalysis
Arghyadeep Bhattacharyya, Subhash Chandra Makhal, Soumen Ghosh, Nikhil Guchhait
An asymmetric hydrazide, (12E, 13E)-2-((naphthalen-1-yl) methylene)-1-(1-(2-hydroxynaphthalen-6-yl) ethylidene) hydrazine (abbreviated as AH) is synthesized and characterized by standard techniques and crystal structure of AH has been obtained. The naked eye detection of F- in aqueous acetonitrile (acetonitrile: water=7:3/v:v) by AH has been investigated by UV-Visible titration and in presence of other anions, the limit of detection being 1.31×10-6 (M). The mechanism of F- sensing has been explored by1 H NMR titration...
March 7, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
A R Fernandes, D Mortimer, M Holmes, M Rose, L Zhihua, X Huang, F Smith, S Panton, L Marshall
The occurrence of a range of regulated and emerging organic environmental contaminants was investigated in 182 samples of edible marine fish sampled mainly from UK marine regions, but extending northerly to the coast of Norway and south to the Algarve. These species (sprats, mackerel, turbot, halibut, herring, grey mullet, sea bass, grey mullet, sardines, etc.) are among those considered to be at the highest risk of contamination with regulated contaminants such as polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs, dioxins), and polychlorinated biphenyls (PCBs), but the occurrence of polybrominated diphenylethers (PBDEs) and polybrominated biphenyls (PBBs) was also investigated...
March 6, 2018: Environment International
Antonio Bauzá, Antonio Frontera
In this study the ability of metal clusters involving elements from group IB (Ag, Cu and Au) to favourably interact with π-systems of different size and electronic nature has been evaluated at the PBE0-D3/def2-TZVPP//PBE0-D3/def2-TZVP level of theory. We have used M9 clusters (M = Cu, Ag and Au) as σ-hole and σ-lump donors and benzene, trifluorobenzene and hexafluorobenzene as aromatic rings. In addition, we have expanded our study to the analysis of extended π-systems by using naphthalene and anthracene moieties as well as their corresponding perfluorinated derivatives...
March 9, 2018: Chemistry: a European Journal
Yu-Qiong Gao, Nai-Yun Gao, Da-Qiang Yin, Fu-Xiang Tian, Qiao-Feng Zheng
In this study, the degradation of propranolol (PRO) by UV/persulfate process was systematically investigated. Direct photolysis of PRO was limited due to its low quantum yield, while the PRO degradation efficiency can be greatly promoted by the combination of persulfate and UV irradiation. Radical scavenging tests showed that both SO4 - and OH contributed to the removal of PRO, with SO4 - playing a more important role. The degradation rate of PRO was improved by increasing the persulfate dose and initial solution pH consistent with pseudo-first-order reaction kinetics...
March 1, 2018: Chemosphere
Emily J Wasserman, Samantha M Reilly, Reema Goel, Jonathan Foulds, John P Richie, Joshua E Muscat
BACKGROUND: Increased cigarette costs have inadvertently strengthened the appeal of discounted brands to price-sensitive smokers. While smokers perceive discounted brands as having poorer quality, little is known about their delivery of toxic tobacco smoke constituents compared to premium-branded tobacco products. METHODS: We investigated the differences between discount and premium brand smokers using the National Health and Nutrition Examination Survey (NHANES) 2011-2012 Special Smoker Sample...
March 6, 2018: Cancer Epidemiology, Biomarkers & Prevention
Jun Li, Younghee Kwon, Kyung Soo Chung, Chang Su Lim, Dayoung Lee, Yongkang Yue, Jisoo Yoon, Gyoungmi Kim, Sang-Jip Nam, Youn Wook Chung, Hwan Myung Kim, Caixia Yin, Ji-Hwan Ryu, Juyoung Yoon
Rationale: Among the biothiols-related diseases, sepsis is defined as life-threatening organ dysfunction caused by a dysregulated host response to infection and can result in severe oxidative stress and damage to multiple organs. In this study, we aimed to develop a fluorescence chemosensor that can both detect GSH and further predict sepsis. Methods: In this study, two new naphthalene dialdehyde compounds containing different functional groups were synthesized, and the sensing abilities of these compounds towards biothiols and its applications for prediction of sepsis were investigated...
2018: Theranostics
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"