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Tomotaka Nakamura, Yuhki Harigaya, Yuya Kimura, Megumi Kuroiwa, Yuhri Kurata, Kazuichi Isaka, Yuichi Suwa
The inhibitory effect of 20 substances of various chemical species on the anaerobic ammonia oxidation (anammox) activity of an enrichment culture, predominated by Candidatus Brocadia, was determined systematically by using a (15)N tracer technique. The initial anammox rate was determined during first 25 min with a small-scale anaerobic batch incubation supplemented with possible inhibitors. Although Cu(2+) and Mn(2+) did not inhibit anammox, the remaining 18 substances [Ni(2+), Zn(2+), Co(2+), [Formula: see text] , Fe(2+), 4 amines, ethylenediaminetetraacetic acid (EDTA), ethylenediamine-N,N'-bis (2-hydroxyphenylacetic acid) (EDDHA), citric acid, nitrilotriacetic acid (NTA), N,N-dimethylacetamide (DMA), 1,4-dioxane, dimethyl sulfoxide (DMSO), N,N-dimethylformamide (DMF) and tetrahydrofuran (THF)] were inhibitory...
May 16, 2017: Journal of Bioscience and Bioengineering
Aggoun Djouhra, Ourari Ali, Ruiz-Rosas Ramiro, Morallon Emilia
A new colorimetric receptor HL, acting as a bidentate Schiff base ligand, has been synthesized by condensation of 2-methoxybenzylamine on 2,3-dihydroxybenzaldehyde in a methanolic solution. Interestingly, this chelating agent can selectively detect Cu(2+), Co(2+), Fe(2+) and Fe(3+) ions with a simple and an easy-to-make, well defined naked-eye visible color changes in two different solvents like acetonitrile and methanol. This bidentate ligand coordinates three metal ions of Co(II), Cu(II) and Fe(II) via nitrogen and oxygen atoms...
May 10, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Xiaodong Sun, Shuo Yao, Guanghua Li, Lirong Zhang, Qisheng Huo, Yunling Liu
A Zn4O clusters based flexible doubly interpenetrated metal-organic framework [(Zn4O)2(DCPB)6DMF]·2DMF·8H2O (JLU-Liu33, H2DCPB = 1,3-di(4-carboxyphenyl)benzene, DMF = N,N-dimethylformamide) with pcu topology has been solvothermally synthesized. Because of its flexible structure, JLU-Liu33 exhibits a breathing behavior upon N2 and CO2 adsorption at low temperature, and C2H6 and C3H8 adsorption at 273 and 298 K. Furthermore, by adopting the direct synthesis method, two isomorphic compounds-JLU-Liu33L and JLU-Liu33H-have been obtained by partial substituting Zn with different amounts of Co into the JLU-Liu33 framework...
May 19, 2017: Inorganic Chemistry
Qiaoli Niu, Hengsheng Wu, Wentao Huang, Jing Tong, Fengye Ye, Yong Zhang, Wenjin Zeng, Ruidong Xia, Yonggang Min
Polar solvent dimethyl formamide (DMF) was used to treat the emissive layer (EML) of polymer light-emitting diode (PLED). The formation of dipole layer at the EML/cathode interface after DMF treatment was proved, which led to a reduction of electron injection barrier. The dipole layer was formed mainly because of the intrinsic polarity of DMF. By controlling the residue of DMF on the EML, a maximum enhancement of peak luminous efficiency from 5.33±0.57 to 12.05±1.2 cd/A was achieved. This study suggests that solvent treatment is a simple and efficient approach to realize highly efficient PLEDs with high-work-function metal cathode...
May 18, 2017: ACS Applied Materials & Interfaces
S Thamban, U Arjun, M Padmanabhan, R Nath
We present the synthesis and a detailed investigation of structural and magnetic properties of metal-organic compound Cu2(IPA)2(DMF)(H2O) by means of x-ray diffraction, magnetization, and heat capacity measurements. Single crystals of the title compound were synthesized by judicious selection of organic ligand and employing a selective hydrothermal reaction route. It crystallizes in an orthorhombic structure with space group Cmca. The structural analysis revealed that two Cu(2+) ions are held together by the organic component (-O-C-O-) in a square paddle-wheel to form spin dimers which are aligned perpendicular to each other and are further coupled through organic ligands (isophthalic acid) forming two-dimensional layers...
May 18, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
Stevanus Hiendrawan, Bambang Veriansyah, Edward Widjojokusumo, Raymond R Tjandrawinata
Simultaneous micronization and purification of DLBS3233 bioactive fraction, a combination of two Indonesian herbals Lagerstroemia speciosa and Cinnamomum burmannii has been successfully performed via supercritical anti-solvent (SAS) technology. The objective of the present study was to investigate the effectiveness of SAS technology to micronize and reduce coumarin content of DLBS3233. The effects of four SAS process parameters, i.e. pressure, temperature, concentration and solution flow rate on particle formation were investigated...
April 2017: Journal of Advanced Pharmaceutical Technology & Research
Yahui Li, Zhenhao Zhao, Feng Lin, Xiaobing Cao, Xian Cui, Jinquan Wei
It is of great importance to investigate the crystallization of organometallic perovskite from solution for enhancing performance of perovskite solar cells. Here, this study develops a facile method for in situ observation of crystallization and growth of the methylammonium lead iodide (MAPbI3 ) perovskite from microdroplets ejected by an alternating viscous and inertial force jetting method. It is found that there are two crystallization modes when MAPbI3 grows from the CH3 NH3 I (MAI)/PbI2 /N,N-dimethylformamide (DMF) solution: needle precursors and granular perovskites...
May 17, 2017: Small
Xuan Zhang, Wei-Wei Ma
A butterfly-shaped benzothiazole derivative, bis-2,6-dibenzothiazolylphenol (2), was synthesized via 4-methylene bridging two 2,6-dibenzothiazolylphenol (1) molecules, and the excited-state intramolecular proton transfer (ESIPT) fluorescence of 1 and 2 were comparably investigated by steady-state spectroscopic experiments with the aid of theoretical simulations for structure and energy. It was found that 2 showed similar ESIPT emissions to those of 1 in solution and solid states, but the ESIPT fluorescence quantum yield was substantially amplified in the case of more "integrated" 2...
May 17, 2017: Methods and Applications in Fluorescence
Hai-Hua Wang, Lei Hou, Yong-Zhi Li, Chen-Yu Jiang, Yao-Yu Wang, Zhonghua Zhu
A new Co(II)-based MOF, {[Co2(tzpa)(OH)(H2O)2]·DMF}n (1) (H3tzpa = 5-(4-(tetrazol-5-yl)phenyl)isophthalic acid), was constructed by employing a tetrazolyl-carboxyl ligand H3tzpa. 1 possesses 1D tubular channels that are decorated by μ3-OH groups, uncoordinated carboxylate O atoms, and open metal centers generated by the removal of coordinated water molecules, leading to high CO2 adsorption capacity and significantly selective capture for CO2 over CH4 and CO in the temperature range of 298-333 K. Moreover, 1 shows the chemical stability in acidic and basic aqueous solutions...
May 17, 2017: ACS Applied Materials & Interfaces
Anahid Safari, Mehdi Fazeli, Mohammad Reza Namavar, Nader Tanideh, Peyman Jafari, Afshin Borhani-Haghighi
BACKGROUND: Dimethyl fumarate (DMF) has immune-modulatory and neuro-protective characteristics that can be used for treatment of acute ischemic stroke. OBJECTIVE: To investigate the therapeutic effects of DMF on histological and functional recovery of rats after transient middle cerebral artery (MCA) occlusion. METHODS: 22 Sprague-Dawley male rats weighing 275-300 g were randomized into three groups by block randomization. In the sham group (n = 7), the neck was opened, but neither MCA was occluded, nor any drug was administered...
May 9, 2017: Restorative Neurology and Neuroscience
Zhijun Wu, Qiang Liu, Chunmin Wang, Bo Xu, Mingyue Guan, Meng Ye, Hai Jiang, Min Zheng, Man Zhang, Wenjin Zhao, Xiao Jiang, Shuguang Leng, Juan Cheng
Widespread contamination of N,N-dimethylformamide (DMF) has been identified in the environment of leather industries and their surrounding residential areas. Few studies have assessed the dose-response relationships between internal exposure biomarkers and liver injury in DMF exposed populations. We assessed urinary N-methylformamide (NMF) and N-acetyl-S-(N-methylcarbamoyl) cysteine (AMCC) and blood N-methylcarbmoylated hemoglobin (NMHb) levels in 698 Chinese DMF-exposed workers and 188 Non-DMF- exposed workers using ultra-performance liquid-chromatography tandem mass-spectrometry...
May 15, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
M Raghuraman, Prachi Verma, Amit Kunwar, Prasad P Phadnis, V K Jain, K Indira Priyadarsini
Diselenonicotinamide (DSNA), a synthetic organoselenium compound, was evaluated for its radioprotective effect in cellular models. A clonogenic assay in Chinese Hamster Ovary (CHO) cells and an apoptosis assay in murine splenic lymphocytes indicated that pre-treatment with DSNA at a concentration of 25 μM significantly protected them from radiation-induced cell death. Upon irradiation (1-12 Gy), dose-response studies were carried out under similar treatment conditions, and its dose modification factor (DMF) was estimated to be 1...
May 15, 2017: Metallomics: Integrated Biometal Science
Milind R Shreykar, Nagaiyan Sekar
The newly synthesized three coumarin pyrazole hybrid excited state intramolecular proton transfer (ESIPT) dyes show efficient charge transfer from the pyrazole ring and the coumarin towards the electron withdrawing dicyanovinylene group as revealed from the frontier molecular orbitals. Aggregation induced emission enhancement (AIEE) studies with 2-((3-(4-hydroxy-2-oxo-2H-chromen-3-yl)-1-phenyl-1H-pyrazol-4-yl)methylene) malononitrile showed 9 fold increase in the emission enhancement in 90% DMF-H2O mixture...
May 13, 2017: Journal of Fluorescence
Umesh Warde, Nagaiyan Sekar
Two benzo[h]chromen-3-yl)ethylidene) malononitrile styryl hybrid dyes are synthesized and characterized by NMR and elemental analysis. One is based on nitrogen donor and other on oxygen (3b and 3b respectively). Dyes are low emissive in the solution but dramatically showed increase in emission intensity in aggregates form in the THF (tetrahydrofuran) /water system. Dyes are also sensitive to viscosity and showed increased emission intensity in the DCM:PEG 400 system and DMF:PEG 400 system respectively. Dyes 3a and 3b showed higher viscosity sensitivity constant (0...
May 12, 2017: Journal of Fluorescence
Srinivasan Natarajan, R Hota, S Mistry
A room temperature slow diffusion reaction of the metal nitrates [M = Zn(II) and Co(II)] with 5-azido isopthalic acid (AIPA) and 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene (BPDB) resulted a new two dimensional interdigitated coordination polymer, [M(C8H3N3O4)(C12H10N4)].DMF [DMF = dimethyl formamide (C3H7NO)]. The non bonded DMF molecules, was found to exchange through a single-crystal to single-crystal (SCSC) fashion with many aliphatic nitrile compounds. More importantly, the present compound, I.DMF(Zn) appears to absorb cis-crotononitrile selectively from the cis-trans mixture as well as a mixture containing the structural isomer (allylnitrile)...
May 12, 2017: Chemistry, An Asian Journal
Feng-Ling Yuan, Yan-Qiu Yuan, Meng-Yao Chao, David J Young, Wen-Hua Zhang, Jian-Ping Lang
The one-pot reaction of Cd(NO3)2·4H2O and 5-(6-(hydroxymethyl)pyridin-3-yl)isophthalic acid (H2L) in DMF/H2O (DMF = N,N-dimethylformamide) produced a two-dimensional (2D) metal-organic framework (MOF) of [Cd(L)(H2O)2] (A) bearing aqua-bridged Cd centers, accompanied by two three-dimensional (3D) MOFs [Cd(L)(DMF)0.5] (B) and [Cd(L)] (C). Removing the bridging aqua molecules of A by heating led to the formation of an additional 3D MOF of [Cd(L)] (D) in a single-crystal to single-crystal (SCSC) manner. The search for the preceding compound that could convert to A resulted in the isolation of a 2D MOF [Cd(L)(DMF)] (E) that readily converted to A in water, but with the loss of single crystallinity...
May 11, 2017: Inorganic Chemistry
Yue-Qiao Hu, Mu-Qing Li, Yanyan Wang, Tao Zhang, Pei-Qin Liao, Zhiping Zheng, Xiao-Ming Chen, Yan-Zhen Zheng
We report herein a strategy for capturing and sensing iodine by strong I-…I2…I- interaction confined in a metal-organic framework, [Tb(Cu4I4)(ina)3(DMF)] (1) (ina = isonicotinate). As revealed by single-crystal X-ray crystallography, the uptaken I2 molecules directly contact the {Cu4I4}n chains, forming virtually an electronically polarizable tetraiodide anion (I42-) via strong I-…I2…I- interaction. As such, a quasi-copper-iodide layer of {Cu4I5}n with semiconducting characteristics results, leading to a significant enhancement (Δσ = 107 times) in electrical conductivity over the I2-free 1...
May 10, 2017: Chemistry: a European Journal
Matthew D Smith, Kyle A Martin, Peter A Calabresi, Pavan Bhargava
We evaluated the effect of dimethyl fumarate (DMF) treatment on B-cell memory and cytokine production in 18 patients with relapsing remitting multiple sclerosis (RRMS) using peripheral blood mononuclear cells obtained prior to and at 6 months post-DMF initiation. We noted a decline in the absolute B-cell number with DMF treatment, with a preferential depletion of memory B cells and a concurrent increase in naïve B cells. We noted significant reductions in GM-CSF, TNF-α, and IL-6 producing B cells with DMF treatment...
May 2017: Annals of Clinical and Translational Neurology
Hester Eppinga, H Bing Thio, Marco W J Schreurs, Blerdi Blakaj, Ruena I Tahitu, Sergey R Konstantinov, Maikel P Peppelenbosch, Gwenny M Fuhler
BACKGROUND: Psoriasis and inflammatory bowel disease (IBD) are chronic inflammatory diseases sharing similar pathogenic pathways. Intestinal microbial changes such as a decrease of bakers' yeast Saccharomyces cerevisiae have been reported in IBD, suggesting the presence of a gut-skin axis. OBJECTIVE: To investigate whether the S. cerevisiae abundance was altered in psoriasis patients versus healthy controls, and whether dimethylfumarate (DMF) interacted with this yeast...
2017: PloS One
Jun-Zi Wu, David H Bremner, He-Yu Li, Shi-Wei Niu, Shu-De Li, Li-Min Zhu
A new block polymer named poly 3-acrylamidophenylboronic acid-b-6-O-vinylazeloyl-d-galactose (p(AAPBA-b-OVZG)) was prepared using 3-acrylamidophenylboronic acid (AAPBA) and 6-O-vinylazeloyl-d-galactose (OVZG) via a two-step procedure involving S-1-dodecyl-S-(α', α'-dimethyl-α″-acetic acid) trithiocarbonate (DDATC) as chain transfer agent, 2,2-azobisisobutyronitrile (AIBN) as initiator and dimethyl formamide (DMF) as solvent. The structures of the polymer were examined by Fourier transform infrared spectroscopy (FT-IR) and (1)H NMR and the thermal stability was determined by thermal gravimetric analysis (TG/DTG)...
July 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
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