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Ali Fakhri, Mona Azad, Leila Fatolahi, Shiva Tahami
Water pollution caused by different pollutants is one of the challenging tasks for the scientific community. We have prepared and characterized a material for removal of pollutant compounds. ZnO quantum dots decorated CuO nanosheets and TiO2 quantum dots decorated WO3 nanosheets composites have been prepared using a hydrothermal method. The as synthesized catalysts were characterized by various techniques. The crystallite sizes of CuO NSs and WO3 NSs were to be obtained 12.5 and 13.25nm and when dopped with ZnO and TiO2 size reduces to 3...
November 10, 2017: Journal of Photochemistry and Photobiology. B, Biology
Shasha Liu, Tianhui Zhao, Yuanrong Zhu, Xiaoxia Qu, Zhongqi He, John P Giesy, Wei Meng
Chemical properties of whole organic matter (OM) and its dissolved organic matter (DOM) extracted from three types of dominant macrophytes in Lake Dianchi were comparatively characterized using elemental analysis, UV, 3D-EEM and (13)C NMR spectroscopy and their implications for lakes were discussed. Ratios of C/N and C/P were least in the floating water hyacinth and submerged sago pondweed, while total dissolved nitrogen (TDN) and phosphorus (TDP), dissolved organic nitrogen (DON) and phosphorus (DOP) were greatest in those species...
November 6, 2017: Science of the Total Environment
Yin Jiang, Guansheng Zheng, Ning Cai, Huatang Zhang, Yi Tan, Mengjiao Huang, Yonghe He, Jun He, Hongyan Sun
A facile fluorescent probe (NBD-DOP) has been developed to detect hypochlorous acid (HOCl) in this study. The probe consists of a NBD fluorophore and a dopamine moiety that reacts with HOCl specifically. The dopamine group quenches the fluorescence of NBD efficiently through a photoinduced electron transfer (PET) effect. Experimental data showed that NBD-DOP could detect HOCl with ultrafast response, high sensitivity and high selectivity in a wide pH range. The probe could also be used to detect the myeloperoxidase enzyme that produces HOCl...
November 3, 2017: Chemical Communications: Chem Comm
Shazia Mumtaz, Li-Sheng Wang, Syed Zajif Hussain, Muhammad Abdullah, Zille Huma, Zafar Iqbal, Brian Creran, Vincent M Rotello, Irshad Hussain
We report a simple and economical colorimetric bacterial sensing strategy with catalytic amplification using dopamine-capped iron oxide (Dop-Fe3O4) nanoparticles. These nanoparticles catalyse the oxidation of a chromogenic substrate in the presence of H2O2 into a green colored product. The catalytic activity of the nanoparticles is inhibited in the presence of bacteria, providing naked eye detection of bacteria at 10(4) cfu mL(-1) and by spectrophotometric detection down to 10(2) cfu mL(-1).
November 14, 2017: Chemical Communications: Chem Comm
Jian Liang, Shuxian Chen, Youdong Hu, Yiqi Yang, Jun Yuan, Yanfang Wu, Shijie Li, Jizhong Lin, Lian He, Shaozhen Hou, Lian Zhou, Song Huang
The purpose of this study was to investigate the protective roles and mechanisms of Dendrobium officinale polysaccharides (DOPS) on secondary liver injury in acute colitis. Firstly, the mice model of secondary liver injury in acute colitis was induced by 4% Dextran sodium sulfate (DSS). Inflammatory cell model was established by LPS-stimulated RAW264.7 cells. Then, the protective roles of DOPS were evaluated by both in vivo and in vitro experiment. The results showed that DOPS attenuated DSS-induced hepatic pathological damage, liver parameters, infiltration of macrophages, cytokines levels, MDA level and increased the antioxidant enzymes activities...
October 23, 2017: International Journal of Biological Macromolecules
N L M A Samah, Khuan Y Lee, S A Sulaiman, R Jarmin
Intolerance of histamine could lead to scombroid poisoning with fatal consequences. Current detection methods for histamine are wet laboratory techniques which employ expensive equipment that depends on skills of seasoned technicians and produces delayed test analysis result. Previous works from our group has established that ISFETs can be adapted for detecting histamine with the use of a novel membrane. However, work to integrate ISFETs with a readout interfacing circuit (ROIC) circuit to display the histamine concentration has not been reported so far...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Ruihuan Li, Jie Xu, Xiangfu Li, Zhen Shi, Paul J Harrison
Phosphorus was the stoichiometrically limiting nutrient in the Pearl River Estuary (PRE). In order to examine how the river discharge regulates phosphorus dynamics in the PRE, the concentrations of dissolved inorganic phosphorus (DIP) and organic phosphorus (DOP), particulate inorganic phosphorus (PIP) and organic phosphorus (POP) in the water column were determined in May 2015 (spring), August 2015 (summer) and January 2016 (winter). Our results showed that all types of phosphorus were significantly lower in spring and summer than in winter...
October 20, 2017: Scientific Reports
Chen Xing, Changjian Ke, Ke Zhang, Zhen Guo, Yibo Zhong, Deming Liu
A polarization-independent narrow passband optical filter with a FWHM bandwidth of ~10 MHz based on stimulated Brillouin scattering (SBS) effect is proposed and experimentally demonstrated. By optimizing the parameters of a depolarizer consisting of a power-splitting Mach-Zehnder interferometer (MZI) structure, degree of polarization (DOP) of the pump source can be reduced to less than 5%. Consequently frequency response of the SBS-based filter remains almost unchanged when the state of polarization (SOP) of the input signal varies and the corresponding polarization-dependent gain (PDG) is less than 1 dB...
September 4, 2017: Optics Express
Florent Eymard, Camille Parsons, Mark H Edwards, Florence Petit-Dop, Jean-Yves Reginster, Olivier Bruyère, Xavier Chevalier, Cyrus Cooper, Pascal Richette
OBJECTIVE: Epidemiological and experimental studies have suggested that lipid disorders might be involved in the pathophysiology of knee osteoarthritis (OA). Studies assessing the effect of statins on knee OA progression have shown conflicting results. We investigated the impact of statin use on radiological progression in patients with radiological and symptomatic knee OA. METHODS: 336 patients from the placebo arm of SEKOIA trial completed the 3-year follow-up and were included in this post-hoc analysis...
October 13, 2017: Joint, Bone, Spine: Revue du Rhumatisme
Jea-Young Lee, M Grant Liska, Marci Crowley, Kaya Xu, Sandra A Acosta, Cesar V Borlongan, Vivian A Guedes
The opioid system is considered a potential therapeutic target in a variety of neurological disorders. Delta opioid receptors (DOPs) are broadly expressed in the brain, and their activation protects cells from hypoxic/ischemic insults by counteracting disruptions of ionic homeostasis and initiating neuroprotective pathways. The DOP agonist D-Ala2-D-Leu2-Enkephalin (DADLE) promotes neuronal survival, mitigates apoptotic pathways, and protects neurons and glial cells from ischemia-induced cell death, thus making DADLE a promising therapeutic option for stroke...
October 10, 2017: Current Drug Discovery Technologies
Marta Espina Palanco, Nils Skovgaard, Jesper Søndergaard Hansen, Kirstine Berg-Sorensen, Claus Helix-Nielsen
The barrier properties of cellular membranes are increasingly attracting attention as a source of inspiration for designing biomimetic membranes. The broad range of potential technological applications makes the use of lipid and lately also polymeric materials a popular choice for constructing biomimetic membranes, where the barrier properties can be controlled by the composition of the membrane constituent elements. Here we investigate the membrane properties reported by the light-induced proton pumping activity of bacteriorhodopsin (bR) reconstituted in three vesicle systems of different membrane composition...
October 11, 2017: Bioinspiration & Biomimetics
C J Härter, L D Lima, H G O Silva, D S Castagnino, A R Rivera, K T Resende, I A M A Teixeira
It has been suggested that maintenance requirements are similar among animals of different physiological stages; however, important physiological changes occur in the maternal body during pregnancy. Therefore, the aim of this study was to determine the energy and protein requirements for the maintenance of pregnant dairy goats and to estimate their efficiency of energy and protein utilization for maintenance and pregnancy. We used 66 multiparous pregnant goats having 49.0 ± 1.59 kg initial BW (around the third or fourth parturition) arranged in a randomized block design with a 3 × 3 factorial scheme including slaughter at different days of pregnancy (DOP; 80, 110, and 140 d) and feed restriction (0, 20, and 40% feed restriction)...
September 2017: Journal of Animal Science
Irini Topalidou, Kirsten Cooper, Laura Pereira, Michael Ailion
The NALCN/NCA ion channel is a cation channel related to voltage-gated sodium and calcium channels. NALCN has been reported to be a sodium leak channel with a conserved role in establishing neuronal resting membrane potential, but its precise cellular role and regulation are unclear. The Caenorhabditis elegans orthologs of NALCN, NCA-1 and NCA-2, act in premotor interneurons to regulate motor circuit activity that sustains locomotion. Recently we found that NCA-1 and NCA-2 are activated by a signal transduction pathway acting downstream of the heterotrimeric G protein Gq and the small GTPase Rho...
October 2017: PLoS Genetics
Toshihiko Oka, Moynul Hasan, Md Zahidul Islam, Md Moniruzzaman, Masahito Yamazaki
Electrostatic interactions (EIs) play important roles in the structure and stability of inverse bicontinuous cubic (QII) phases of lipid membranes. We examined the effect of pH on the phase of dioleoylphosphatidylserine (DOPS)/monoolein (MO) membranes at low ionic strengths using small-angle X-ray scattering (SAXS). We found that the phase transitions from lamellar liquid-crystalline (Lα) to primitive cubic (QII(P)) phases in DOPS/MO (2/8 molar ratio) membranes occurred in buffers containing 50 mM NaCl at and below the final pH of 2...
October 13, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
Noé Ortega-Quijano, Julien Fade, François Parnet, Mehdi Alouini
Recent developments of polarized light sources with tunable state and degree of polarization (SOP and DOP) inherently provide a temporally incoherent beam, which makes them unsuitable for applications like interferometry. We present a method for generating a coherent beam with full, precise, and independent control of the SOP and DOP. Our approach is based on an imbalanced dual-frequency dual-polarization light source. We demonstrate that it offers three different working regimes, respectively providing perfectly depolarized light, DOP modulated light, or fully polarized light with a deterministic SOP trajectory...
August 1, 2017: Optics Letters
Jun-Kai Gao, Zi-Jun Zhang, Yan-Jun Jiang, Yan Chen, Shu-Feng Gao
Tannic acid-templated mesoporous silica (TAMS) was synthesized using a simple nonsurfactant template method and dopamine-functionalized TAMS (Dop-TAMS), which was prepared via a biomimetic coating, was developed as a new support for immobilization of NHase (NHase@Dop-TAMS). The Dop-TAMS was thoroughly characterized by the transmission electron microscopy (TEM), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), and Fourier transform infrared (FT-IR) and the results showed that the Dop-TAMS possessed sufficiently large pore size and volume for the accommodation of NHase...
September 25, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Konstantin A Blagodatskikh, Vladimir M Kramarov, Ekaterina V Barsova, Alexey V Garkovenko, Dmitriy S Shcherbo, Andrew A Shelenkov, Vera V Ustinova, Maria R Tokarenko, Simon C Baker, Tatiana V Kramarova, Konstantin B Ignatov
Whole-genome amplification (WGA) techniques are used for non-specific amplification of low-copy number DNA, and especially for single-cell genome and transcriptome amplification. There are a number of WGA methods that have been developed over the years. One example is degenerate oligonucleotide-primed PCR (DOP-PCR), which is a very simple, fast and inexpensive WGA technique. Although DOP-PCR has been regarded as one of the pioneering methods for WGA, it only provides low genome coverage and a high allele dropout rate when compared to more modern techniques...
2017: PloS One
C Mrowietz, R P Franke, G Pindur, U Wolf, F Jung
The Laser Doppler technique, a noninvasive method to estimate skin blood flow (LDF), is frequently used in research and clinical routine [1]. Here, the measurements were carried out with a new Laser Doppler system, the DOPsystem, which allows to measure frequency spectra in four different frequency windows according to the velocities in venules (low velocity), capillaries (low to medium velocities), and in arteries (with high and very high velocities). However, the diagnostic reliability or the effectiveness of the LDF has not yet been evaluated sufficiently, which is indispensable, where medical diagnostics and therapy controls are concerned...
September 4, 2017: Clinical Hemorheology and Microcirculation
V B Semenyutin, G А Asaturyan, А А Nikiforova, G К Panuntsev, V A Aliev, V B Iblyaminov, A V Savello, А Patzak, K V Laptev, I P Dudanov, О А Pavlov
AIM: To study cerebral autoregulation (CA) in region of the stenotic carotid artery. MATERIAL AND METHODS: The study involved 35 patients with critical stenosis of the carotid arteries, including 24 patients were asymptomatic and 11 patients with symptomatic course. Blood flow velocity in middle cerebral arteries was monitored using Multi Dop X (DWL, Germany) with simultaneous noninvasive systemic blood pressure registration (CNAP, Austria). CA was assessed by calculating the phase shift (PS) between spontaneous oscillations of blood flow velocity and blood pressure within the range of systemic Mayer waves (80-120 mHz)...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
Bhupender Sharma, Shamsher S Kanwar
Cancer is a leading cause of mortality and morbidity globally. Many prominent cancer-associated molecules have been identified over the recent years which include EGFR, CD44, TGFbRII, HER2, miR-497, NMP22, BTA, Fibrin/FDP etc. These biomarkers are often used for screening, detection, diagnosis, prognosis, prediction and monitoring of cancer development. Phosphatidylserine (PS) is an essential component in all human cells which is present on the inner leaflet of the cell membrane. The oxidative stress causes exposure of PS on the surface of the vascular endothelium in the cancer cells (lung, breast, pancreatic, bladder, skin, brain metastasis, rectal adenocarcinoma etc...
September 1, 2017: Seminars in Cancer Biology
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