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https://www.readbyqxmd.com/read/28092826/synthesis-ph-dependent-photometric-and-electrochemical-investigation-redox-mechanism-and-biological-applications-of-novel-schiff-base-and-its-metallic-derivatives
#1
Abdur Rauf, Afzal Shah, Abdul Aziz Khan, Aamir Hassan Shah, Rashda Abbasi, Irfan Zia Qureshi, Saqib Ali
A novel Schiff base, 1-((2, 4-dimethylphenylimino)methyl)naphthalen-2-ol abbreviated as (HL) and its four metallic complexes were synthesized and confirmed by (1)H and (13)C NMR, FTIR, TGA and UV-Visible spectroscopy. Schiff base was also characterized by X-ray analysis. The photometric and electrochemical responses of all the synthesized compounds were investigated in a wide pH range. Structures of the compounds were optimized computationally for the evaluation of different physico-chemical parameters. On the basis of electrochemical results the redox mechanistic pathways of the compounds were proposed...
January 9, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28092785/integrated-ssfp-for-functional-brain-mapping-at-7t-with-reduced-susceptibility-artifact
#2
Kaibao Sun, Rong Xue, Peng Zhang, Zhentao Zuo, Zhongwei Chen, Bo Wang, Thomas Martin, Yi Wang, Lin Chen, Sheng He, Danny J J Wang
Balanced steady-state free precession (bSSFP) offers an alternative and potentially important tool to the standard gradient-echo echo-planar imaging (GE-EPI) for functional MRI (fMRI). Both passband and transition band based bSSFP have been proposed for fMRI. The applications of these methods, however, are limited by banding artifacts due to the sensitivity of bSSFP signal to off-resonance effects. In this article, a unique case of the SSFP-FID sequence, termed integrated-SSFP or iSSFP, was proposed to overcome the obstacle by compressing the SSFP profile into the width of a single voxel...
December 30, 2016: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/28092676/intracellular-il-37b-interacts-with-smad3-to-suppress-multiple-signaling-pathways-and-the-metastatic-phenotype-of-tumor-cells
#3
C Luo, Y Shu, J Luo, D Liu, D-S Huang, Y Han, C Chen, Y-C Li, J-M Zou, J Qin, Y Wang, D Li, S-S Wang, G-M Zhang, J Chen, Z-H Feng
Multiple signaling pathways that promote tumor cell metastasis are differentially activated in low/non-metastatic and metastatic tumor cells, resulting in the differential expression of metastasis-related genes. The underlying mechanism may involve the alterations of the intrinsic negative regulation in tumor cells. Here we report that the differential expression of interleukin-37b (IL-37b) in tumor cells alters the intrinsic negative regulation of signaling pathways, resulting in the difference of metastatic capacity...
January 16, 2017: Oncogene
https://www.readbyqxmd.com/read/28092638/mr-elastography-to-measure-the-effects-of-cancer-and-pathology-fixation-on-prostate-biomechanics-and-comparison-with-t-1-t-2-and-adc
#4
Deirdre M McGrath, Jenny Lee, Warren D Foltz, Navid Samavati, Theo van der Kwast, Michael A S Jewett, Peter Chung, Cynthia Ménard, Kristy K Brock
MRI is under evaluation for image-guided intervention for prostate cancer. The sensitivity and specificity of MRI parameters is determined via correlation with the gold-standard of histopathology. Whole-mount histopathology of prostatectomy specimens can be digitally registered to in vivo imaging for correlation. When biomechanical-based deformable registration is employed to account for deformation during histopathology processing, the ex vivo biomechanical properties are required. However, these properties are altered by pathology fixation, and vary with disease...
February 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28092612/evaluation-of-serum-cytokine-levels-in-recurrent-airway-obstruction
#5
A Niedźwiedź, H Borowicz, K Kubiak, J Nicpoń, P Skrzypczak, Z Jaworski, M Cegielski, J Nicpoń
Recurrent airway obstruction (RAO) represents a serious health problem and is traditionally classified as an allergic disease, where contact with an antigen can induce clinical airway inflammation, bronchial hyper-responsiveness and reversible airway obstruction. Previous studies have demonstrated the presence of the Th2 response in the lungs of human patients with asthma and horses with heaves. These cells are involved in the production of cytokines which regulate the synthesis of immunoglobulins. 40 horses were evaluated: 30 horses with RAO and 10 healthy animals...
December 1, 2016: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28092475/temperature-development-on-the-external-root-surface-during-laser-assisted-endodontic-treatment-applying-a-microchopped-mode-of-a-980%C3%A2-nm-diode-laser
#6
Franziska Beer, Eleftherios Terry R Farmakis, Josip Kopic, Christoph Kurzmann, Andreas Moritz
OBJECTIVE: The aim of this article was to investigate the temperature increase of the external root surface during laser-assisted endodontic treatment using a diode laser (980 nm) in a microchopped mode. METHODS: Ten freshly extracted, human maxillary incisors with mature apices were collected, prepared to size F4 at working length (ProTaper; Dentsply Maillefer, Ballaigues, Switzerland), mounted to a holder, and irradiated (using spiral movements in coronal direction) with a diode laser (GENTLEray 980 Classic Plus; KaVo, Biberach, Germany) with a 200 μm fiber in four different treatment groups: Group 1 (control group) was irradiated in six cycles of 5-sec irradiation/20-sec pause with 2...
January 12, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28092444/engineering-of-the-bacillus-circulans-%C3%AE-galactosidase-product-specificity
#7
Huifang Yin, Tjaard Pijning, Xiangfeng Meng, Lubbert Dijkhuizen, Sander Sebastiaan van Leeuwen
Microbial β-galactosidase enzymes are widely used as biocatalysts in industry to produce prebiotic galactooligosaccharides (GOS) from lactose. GOS mixtures are used as beneficial additives in infant formula to mimic the prebiotic effects of human milk oligosaccharides (hMOS). The structural variety in GOS mixtures is significantly lower than in hMOS. Since this structural complexity is considered as the basis for the multiple biological functions of hMOS, it is important to broaden the variety of GOS structures...
January 16, 2017: Biochemistry
https://www.readbyqxmd.com/read/28092443/kinetics-and-structure-of-a-cold-adapted-hetero-octameric-atp-phosphoribosyltransferase
#8
Rozanne Stroek, Ying Ge, Paul D Talbot, Mateusz K Glok, Klaudia E Bernas, Catherine M Thomson, Eoin R Gould, Magnus S Alphey, Huanting Liu, Gordon J Florence, James H Naismith, Rafael Guimaraes da Silva
ATP-phosphoribosyltransferase (ATPPRT) catalyses the first step in histidine biosynthesis, the condensation of ATP and 5-phospho-α-D-ribosyl-1-pyrophosphate to generate N(1)-(5-phospho-β-D-ribosyl)-ATP and inorganic pyrophosphate. The enzyme is allosterically inhibited by histidine. Two forms of ATPPRT, encoded by the hisG gene, exist in nature, depending on the species. The long form, HisGL, is a single polypeptide chain with catalytic and regulatory domains. The short form, HisGS, lacks a regulatory domain, and cannot bind histidine...
January 16, 2017: Biochemistry
https://www.readbyqxmd.com/read/28092336/the-construction-of-expanded-prefabricated-adipose-tissue-epat-using-an-external-volume-expansion-eve-device
#9
Yi Yuan, Shuifa Yang, Yangyan Yi, Jianhua Gao, Feng Lu
BACKGROUND: Multiple studies have demonstrated that mechanical forces promote the growth of adipose tissue. However, the mechanism of adipose tissue regeneration induced by mechanical forces remains unclear. METHODS: In an experiment using rats, prefabricated adipose tissue with a vessel pedicle was expanded using an external volume expansion (EVE) device. The volume of fat flaps was tested at different time points. Cell proliferation and angiogenesis were analyzed using immunofluorescence...
January 12, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28091999/porous-nano-cerium-oxide-wood-chip-biochar-composites-for-aqueous-levofloxacin-removal-and-sorption-mechanism-insights
#10
Shengze Yi, Yuanyuan Sun, Xin Hu, Hongxia Xu, Bin Gao, Jichun Wu
The adsorption removal of levofloxacin (LEV), a widely used fluoroquinolone antibiotic, by using the biochars derived from the pyrolysis of pine wood chip pretreated with cerium trichloride was investigated through batch sorption experiments and multiple characterization techniques. The differences in the basic physicochemical properties between Ce-impregnated biochars and the pristine biochars were confirmed by the analysis of elemental compositions, specific surface areas, energy dispersive spectrometry, X-ray diffraction, and thermo-gravimetry...
January 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28091888/testing-the-cp-correction-procedure-with-different-dft-methods-on-h-bonding-complexes-of-%C3%AE%C2%BA-carrabiose-with-water-molecules
#11
Rachida Fodil, Majda Sekkal-Rahal, Adlane Sayede
Interaction of water molecules with κ-carrabiose disaccharide, within three H-bonding complexes, was investigated. Particular interest was focused on the way with which the BSSE correction has to be performed. Two strategies were used, either performing BSSE correction during or after optimization. For this aim, several DFT-functionals (hybrid GGA and hybrid meta-GGA) and 6-31 + G* basis set were considered. The results demonstrated the uselessness of including of BSSE-CP correction during optimization for all complexes...
January 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28091826/paradigms-for-single-patient-multimodality-treatment-for-cerebral-aneurysms-single-center-eleven-year-experience
#12
Abdullah Alobaid, Erez Nossek, Katherine Wagner, Avi Setton, Amir R Dehdashti, David Langer, David Chalif
Endovascular and surgical techniques are conventional options for treating intracranial aneurysms, but criteria for selecting an optimal approach for individual patients remain variable across practitioners and institutions. While endovascular and surgical approaches are generally used alone, both modalities combined in single patients can produce efficacious outcomes. The aim of this study was to evaluate outcomes of combined, concomitant endovascular and surgical modalities in the treatment of multiple and/or complex aneurysms in single patients...
January 14, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28091716/rapid-concentration-detection-and-differentiation-of-bacteria-in-skimmed-milk-using-surface-enhanced-raman-scattering-mapping-on-4-mercaptophenylboronic-acid-functionalized-silver-dendrites
#13
Panxue Wang, Shintaro Pang, Brooke Pearson, Yayoi Chujo, Lynne McLandsborough, Mingtao Fan, Lili He
A novel method was developed to rapidly concentrate, detect, and differentiate bacteria in skimmed milk using surface enhanced Raman scattering (SERS) mapping on 4-mercaptophenylboronic acid (4-MPBA) functionalized silver (Ag) dendrites. The 4-MPBA functionalized Ag dendritic SERS substrate was used to capture the bacterial cells and enhance the bacterial signal. Salmonella, a significantly important food pathogen, was used as the representative strain to optimize and evaluate the developed method. The capture efficiency for Salmonella enterica subsp enterica BAA1045 (SE1045) was 84...
January 14, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28091671/developing-the-family-of-picolinate-ligands-for-mn-2-complexation
#14
Attila Forgács, Rosa Pujales-Paradela, Martín Regueiro-Figueroa, Laura Valencia, David Esteban-Gómez, Mauro Botta, Carlos Platas-Iglesias
We have reported here a series of ligands containing pentadentate 6,6'-(azanediylbis(methylene))dipicolinic acid units that differ in the substituent present at the amine nitrogen atom (acetate: H3DPAAA; phenyl: H2DPAPhA; dodecyl: H2DPAC12A; 4-hexylphenyl: H2DPAC6PhA). The protonation constants of the hexadentate DPAAA(3-) and pentadentate DPAPhA(2-) ligands and the stability constants of their Mn(2+) complexes were determined using pH-potentiometry (25 °C, 0.15 M NaCl). The mono-hydrated [Mn(DPAAA)](-) complex (log KMnL = 13...
January 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28091655/probing-the-magnetic-relaxation-and-magnetic-moment-arrangement-in-a-series-of-dy4-squares
#15
Jianfeng Wu, Shuang-Yan Lin, Si Shen, Xiao-Lei Li, Lang Zhao, Li Zhang, Jinkui Tang
Three μ4-O bridged Dy4 squares, {[Dy4(μ4-O)(HL(1))4(H2O)4]2(NO3)3(OH)}·2H2O·2CH3OH (1), [Dy4(μ4-O)(HL(2))4(SCN)2]·2H2O·4CH3OH (2) and [Dy4(μ4-O)(H2L(3))2(SCN)2]·6H2O (3) were assembled by using a Schiff base ligand and its dimerized and reduced congener, respectively. These complexes share a similar μ4-O bridged Dy4 core, while, both the coordination geometry and metal-ligand interactions are slightly changed upon the modulation of the ligands, resulting in distinct single-molecular magnetic (SMM) and single-molecular toroic (SMT) properties...
January 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28091640/the-binuclear-dual-emitter-br-co-3re-pn-np-re-co-3br-pn-3-chloro-6-4-diphenylphosphinyl-butoxypyridazine-a-new-bridging-p-n-bidentate-ligand-resulting-from-the-ring-opening-of-tetrahydrofuran
#16
Marianela Saldías, Jorge Manzur, Rodrigo E Palacios, María L Gómez, Julio De La Fuente, Germán Günther, Nancy Pizarro, Andrés Vega
Lithium diphenylphosphide unexpectedly provokes the ring-opening of tetrahydrofuran (THF) and by reaction with 3,6-dichloropyridazine leads to the formation of the ligand 3-chloro-6-(4-diphenylphosphinyl)butoxypyridazine (P⋯N), which was isolated. The reaction of this ligand with the (Re(CO)3(THF)Br)2 dimer yields the novel complex [Br(CO)3Re(μ-3-chloro-6-(4-diphenylphosphinyl)butoxypyridazine)2Re(CO)3Br] (BrRe(P⋯N)(N⋯P)ReBr), which was crystallized in the form of a chloroform solvate, (C46H40Br2Cl2N4O8P2Re2)·(CHCl3)...
January 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28091638/highly-ordered-sandwich-type-phthalocyaninato-porphyrinato-europium-double-decker-nanotubes-and-room-temperature-no2-sensitive-properties
#17
Peihua Zhu, Yucheng Wang, Pan Ma, Feifei Song, Xinyu Han, Shuncheng Yao, Cheng Yang
A sandwich-type (phthalocyaninato)(porphyrinato) europium double-decker complex Eu(TPyP){Pc-(OC8H17)8} [TPyP = meso-tetra(4-pyridyl)porphyrin; Pc-(OC8H17)8 = 2,3,9,10,16,17,23,24-octakis(octyloxy)phthalocyanine] (2) was designed and prepared. For comparative studies, Eu(TPyP)(Pc) (1) was also prepared. Highly ordered nanotubes of complexes 1 and 2 were successfully fabricated by using an anodized alumina oxide (AAO) template method. The nanotubes were comparatively investigated by electronic absorption spectra, scanning electron microscopy (SEM), low-angle X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and energy dispersive spectroscopy (EDS) techniques...
January 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28091637/investigation-of-a-new-bis-carboxylate-triazole-based-anchoring-ligand-for-dye-solar-cell-chromophore-complexes
#18
Alessandro Sinopoli, Fiona A Black, Christopher J Wood, Elizabeth A Gibson, Paul I P Elliott
A novel anchoring ligand for dye-sensitised solar cell chromophoric complexes, 1-(2,2'-bipyrid-4-yl)-1,2,3-triazole-4,5-dicarboxylic acid (dctzbpy), is described. The new dye complexes [Ru(bpy)2(dctzbpy)][PF6]2 (AS16), [Ir(ppy)2(dctzbpy)][PF6] (AS17) and [Re(dctzbpy)(CO)3Cl] (AS18) were prepared in a two stage procedure with intermediate isolation of their diester analogues, AS16-Et2, AS17-Et2 and AS18-Et2 respectively. Electrochemical analysis of AS16-Et2, AS17-Et2 and AS18-Et2 reveal reduction potentials in the range -1...
January 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28091590/high-performance-magneto-fluorescent-nanoparticles-assembled-from-terbium-and-gadolinium-1-3-diketones
#19
Rustem Zairov, Asiya Mustafina, Nataliya Shamsutdinova, Irek Nizameev, Beatriz Moreira, Svetlana Sudakova, Sergey Podyachev, Alfia Fattakhova, Gulnara Safina, Ingemar Lundstrom, Aidar Gubaidullin, Alberto Vomiero
Polyelectrolyte-coated nanoparticles consisting of terbium and gadolinium complexes with calix[4]arene tetra-diketone ligand were first synthesized. The antenna effect of the ligand on Tb(III) green luminescence and the presence of water molecules in the coordination sphere of Gd(III) bring strong luminescent and magnetic performance to the core-shell nanoparticles. The size and the core-shell morphology of the colloids were studied using transmission electron microscopy and dynamic light scattering. The correlation between photophysical and magnetic properties of the nanoparticles and their core composition was highlighted...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28091569/epigenetic-regulation-of-plasmodium-falciparum-clonally-variant-gene-expression-during-development-in-anopheles-gambiae
#20
Elena Gómez-Díaz, Rakiswendé S Yerbanga, Thierry Lefèvre, Anna Cohuet, M Jordan Rowley, Jean Bosco Ouedraogo, Victor G Corces
P. falciparum phenotypic plasticity is linked to the variant expression of clonal multigene families such as the var genes. We have examined changes in transcription and histone modifications that occur during sporogonic development of P. falciparum in the mosquito host. All var genes are silenced or transcribed at low levels in blood stages (gametocyte/ring) of the parasite in the human host. After infection of mosquitoes, a single var gene is selected for expression in the oocyst, and transcription of this gene increases dramatically in the sporozoite...
January 16, 2017: Scientific Reports
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