Read by QxMD icon Read

constant light

Habib Ali Molla, Rahul Bhowmick, Abu Saleh Musha Islam, Bibhutibhushan Show, Nillohit Mukherjee, Anup Mondal, Mahammad Ali
A novel highly sensitive and selective fluorescent chemosensor L has been synthesized and characterized by various physicochemical techniques. In 3 : 7 water : MeCN (v/v) at pH 7.2 (10 mM HEPES buffer, μ = 0.05 M LiCl), it selectively recognizes Fe3+ through 1 : 1 complexation resulting in a 106-fold fluorescence enhancement and a binding constant of 8.10 × 104 M-1. The otherwise non-fluorescent spirolactam form of the probe results a dual-channel (absorbance and fluorescence) recognition of Fe3+ via CHEF (chelation enhanced fluorescence) through the opening of the spirolactam ring...
March 22, 2018: Photochemical & Photobiological Sciences
Naoyuki Tanimoto, Mathias W Seeliger
Electroretinography (ERG) is important for functional diagnostics of the retina. Types of information about retinal function obtainable by ERG differ depending on recording conditions, e.g., a combination of light stimulus and adaptation. In terms of stimulation, single-flash and flicker stimuli are frequently used because response properties have been well investigated, allowing an assessment of fundamental retinal functionality; for example, how photoreceptors and bipolar cells, including signal transmission between them, are affected under pathological conditions...
2018: Methods in Molecular Biology
Sarre Kadia Myra Nzaba, Bulelwa Ntsendwana, Bhekie Brilliance Mamba, Alex Tawanda Kuvarega
This study examined the photocatalytic degradation of an azo dye brilliant black (BB) using non-metal/metal co-doped TiO2 . N,Pt co-doped TiO2 photocatalysts were prepared by a modified sol-gel method using amine-terminated polyamidoamine dendrimer generation 0 (PG0) as a template and source of nitrogen. Structural, morphological, and textural properties were evaluated using scanning electron microscopy coupled to energy-dispersive X-ray spectroscopy (SEM/EDX), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), thermal gravimetric analysis (TGA), Fourier transform infrared (FTIR), Raman spectroscopy (RS), photoluminescence (PL) and ultra-violet/visible spectroscopy (UV-Vis)...
March 20, 2018: Environmental Science and Pollution Research International
Christina Strube, Katharina Raue, Elisabeth Janecek
One of the main goals in academia is, and has been, high quality education of students to provide theoretical and practical knowledge essential for professional life. Achieving this goal is highly dependent on teaching procedures and, consequently, on a constant adaptation of teaching styles to align to technical advances and cutting-edge topics. Technical advances can strongly influence teaching and learning in the complex subject area of veterinary parasitology. Today's students are provided with extensive, digital lecture notes, and e-learning offers including virtual microscope technology to independently obtain intensified theoretical knowledge and understanding...
March 15, 2018: Veterinary Parasitology
Stefano Aime, Laurence Ramos, Luca Cipelletti
Material failure is ubiquitous, with implications from geology to everyday life and material science. It often involves sudden, unpredictable events, with little or no macroscopically detectable precursors. A deeper understanding of the microscopic mechanisms eventually leading to failure is clearly required, but experiments remain scarce. Here, we show that the microscopic dynamics of a colloidal gel, a model network-forming system, exhibit dramatic changes that precede its macroscopic failure by thousands of seconds...
March 19, 2018: Proceedings of the National Academy of Sciences of the United States of America
Xiaozhen Yang, Genyong Huang, Min-Jie Xu, Cong Zhang, Yongxu Cheng, Zhigang Yang
Dopamine (DA) plays a modulatory role in numerous physiological processes such as light adaptation and food intake, and exerts these functions through DA receptors (DARs). This study presents, for the first time, isolation and characterization of the dopamine receptor 2(DA2 receptor) cDNA from the intestinal tissue of Eriocheir sinensis, an economically important freshwater aquaculture species in China. The DA2 receptor cDNA sequence, which was obtained by rapid amplification of cDNA ends, is 2369bp long, encode peptide of 589 amino acid, and is highly homologous to related sequences in crustaceans...
2018: PloS One
Lisa A Ostrin, Auzita Sajjadi, Julia S Benoit
SIGNIFICANCE: Significant differences in light exposure were observed between school and summer in children, whereas activity and sleep were similar. Associations between parent and child behaviors suggest a potential mechanism for how myopia is transmitted from parents to children through patterns of environmental exposure, in addition to genetic factors. PURPOSE: Objectively measured time outdoors, light exposure, activity, and sleep were examined in children during school and summer and assessed with eye growth...
March 16, 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Yu Nakajima, Takashi Tsukamoto, Yohei Kumagai, Yoshitoshi Ogura, Tetsuya Hayashi, Jaeho Song, Takashi Kikukawa, Makoto Demura, Kazuhiro Kogure, Yuki Sudo, Susumu Yoshizawa
Light-driven ion-pumping rhodopsins are widely distributed among bacteria, archaea, and eukaryotes in the euphotic zone of the aquatic environment. H+ -pumping rhodopsin (proteorhodopsin: PR), Na+ -pumping rhodopsin (NaR), and Cl- -pumping rhodopsin (ClR) have been found in marine bacteria, which suggests that these genes evolved independently in the ocean. Putative microbial rhodopsin genes were identified in the genome sequences of marine Cytophagia. In the present study, one of these genes was heterologously expressed in Escherichia coli cells and the rhodopsin protein named Rubricoccus marinus halorhodopsin (RmHR) was identified as a light-driven inward Cl- pump...
March 16, 2018: Microbes and Environments
S Junaid S Qazi, Raymond J Turner
EmrE is a member of the small multidrug resistance (SMR) protein family in Escherichia coli . It confers resistance to a wide variety of quaternary cation compounds (QCCs) as an efflux transporter driven by the transmembrane proton motive force. We have expressed hexahistidinyl (His6 ) - myc epitope tagged EmrE, extracted it from membrane preparations using the detergent n-dodecyl-β-D-maltopyranoside (DDM), and purified it using nickel-affinity chromatography. The size of the EmrE protein, in DDM environment, was then examined in the presence and absence of a range of structurally different QCC ligands that varied in their chemical structure, charge and shape...
March 2018: Biochemistry and Biophysics Reports
Srikanth Ravichandran, Alessandro Michelucci, Antonio Del Sol
Alzheimer's disease (AD) is a major neurodegenerative disease and is one of the most common cause of dementia in older adults. Among several factors, neuroinflammation is known to play a critical role in the pathogenesis of chronic neurodegenerative diseases. In particular, studies of brains affected by AD show a clear involvement of several inflammatory pathways. Furthermore, depending on the brain regions affected by the disease, the nature and the effect of inflammation can vary. Here, in order to shed more light on distinct and common features of inflammation in different brain regions affected by AD, we employed a computational approach to analyze gene expression data of six site-specific neuronal populations from AD patients...
2018: Frontiers in Physiology
Sam C Berens, Jessica S Horst, Chris M Bird
When we encounter a new word, there are often multiple objects that the word might refer to [1]. Nonetheless, because names for concrete nouns are constant, we are able to learn them across successive encounters [2, 3]. This form of "cross-situational" learning may result from either associative mechanisms that gradually accumulate evidence for each word-object association [4, 5] or rapid propose-but-verify (PbV) mechanisms where only one hypothesized referent is stored for each word, which is either subsequently verified or rejected [6, 7]...
March 10, 2018: Current Biology: CB
Sathish Kumar T, Navaneeth Krishnan A, Joseph Sahaya Rajan J, Makesh M, Jithendran K P, Alavandi S V, Vijayan K K
The emerging microsporidian parasite Enterocytozoon hepatopenaei (EHP), the causative agent of hepatopancreatic microsporidiosis, has been widely reported in shrimp-farming countries. EHP infection can be detected by light microscopy observation of spores (1.7 × 1 μm) in stained hepatopancreas (HP) tissue smears, HP tissue sections, and fecal samples. EHP can also be detected by polymerase chain reaction (PCR) targeting the small subunit (SSU) ribosomal RNA (rRNA) gene or the spore wall protein gene (SWP)...
March 17, 2018: Parasitology Research
Ngo Fung Lee, Dharmesh Patel, Haiyan Liu, Rui Zhang
Iron(IV)-oxo porphyrins [FeIV (Por)O] (Por = poprhyrin), commonly called compound II models, were produced in three electron-deficient ligands by visible light irradiation of highly photo-labile porphyrin-iron(III) bromates or chlorates. The kinetics of oxygen transfer atom (OAT) reactions with aryl sulfides by these photo-generated [FeIV (Por)O] (3) were studied in CH3 CN solutions. The iron(IV)-oxo porphyrins under study include 5,10,15,20-tetra(2,6-dichlorophenyl)porphyrin-iron(IV)-oxo (3a), 5,10,15,20-tetra(2,6-difluorophenyl)porphyrin-iron(IV)-oxo (3b), and 5,10,15,20-tetra(pentafluorophenyl)porphyrin-iron(IV)-oxo (3c)...
March 9, 2018: Journal of Inorganic Biochemistry
Xianyong Feng, Peifang Wang, Jun Hou, Jin Qian, Yanhui Ao, Chao Wang
In the present work, we reported a simple method for the simultaneous phosphorus (P) doping and oxygen vacancies creation on TiO2 in a single step. The obtained P-doped TiO2 with surface oxygen vacancies (PTSOV) samples exhibited efficient photocatalytic activity for the degradation of fluoroquinolone antibacterial agent (ciprofloxacin) under visible light irradiation. The optimized sample showed a rate constant of 0.065 min-1 for degradation of ciprofloxacin (CIP) and it was about 16.2 times as high as that of TiO2 (0...
March 10, 2018: Journal of Hazardous Materials
Elisabeth Stöttinger, Markus Aichhorn, Britt Anderson, James Danckert
In a constantly changing environment we must adapt to both abrupt and gradual changes to incoming information. Previously, we demonstrated that a distributed network (including the anterior insula and anterior cingulate cortex) was active when participants updated their initial representations (e.g., it's a cat) in a gradually morphing picture task (e.g., now it's a rabbit; Stöttinger et al., 2015). To shed light on whether these activations reflect the proactive decisions to update or perceptual uncertainty, we introduced two additional conditions...
March 14, 2018: Neuropsychologia
Shijie Li, Shiwei Hu, Wei Jiang, Yanping Liu, Yingtang Zhou, Yu Liu, Liuye Mo
A huge challenge in the field of pollutant removal is the scarcity of visible-light-driven (VLD) photocatalysts that are efficient, stable, easily recyclable and capable of mineralizing organic pollutants. In this regard, a novel hierarchical architecture of Bi2 MoO6 nanosheets onto NiTiO3 nanofibers for tetracycline hydrochloride (TC) removal was rationally designed and fabricated via a facile approach. In this heterojunction system, highly homogeneous-distributed Bi2 MoO6 nanosheets were anchored on electrospun NiTiO3 nanofibers, endowing the heterojunction with compact interfacial contact...
March 13, 2018: Journal of Colloid and Interface Science
Delia Bucher, Felix Frey, Kem A Sochacki, Susann Kummer, Jan-Philip Bergeest, William J Godinez, Hans-Georg Kräusslich, Karl Rohr, Justin W Taraska, Ulrich S Schwarz, Steeve Boulant
Although essential for many cellular processes, the sequence of structural and molecular events during clathrin-mediated endocytosis remains elusive. While it was long believed that clathrin-coated pits grow with a constant curvature, it was recently suggested that clathrin first assembles to form flat structures that then bend while maintaining a constant surface area. Here, we combine correlative electron and light microscopy and mathematical growth laws to study the ultrastructural rearrangements of the clathrin coat during endocytosis in BSC-1 mammalian cells...
March 16, 2018: Nature Communications
Yanfeng Wang, Wei Chen, Xiao Chen, Huajun Feng, Dongsheng Shen, Bin Huang, Yufeng Jia, Yuyang Zhou, Yuxiang Liang
CdS/MoS2 , an extremely efficient photocatalyst, has been extensively used in hydrogen photoproduction and pollutant degradation. CdS/MoS2 can be synthesized by a facile one-step hydrothermal process. However, the effect of the sulfur source on the synthesis of CdS/MoS2 via one-step hydrothermal methods has seldom been investigated. We report herein a series of one-step hydrothermal preparations of CdS/MoS2 using three different sulfur sources: thioacetamide, l-cysteine, and thiourea. The results revealed that the sulfur source strongly affected the crystallization, morphology, elemental composition and ultraviolet (UV)-visible-light-absorption ability of the CdS/MoS2 ...
March 2018: Journal of Environmental Sciences (China)
Ana P F Santos, Bianca M Souza, Tânia F C V Silva, Rodrigo P Cavalcante, Silvio C Oliveira, Amílcar Machulek, Rui A R Boaventura, Vítor J P Vilar
The mineralization of bio-recalcitrant humic acids (HAs) by a solar photo-Fenton (SPF) process was investigated in aqueous system, in order to understand its abatement in real high-HA content matrices, such as sanitary landfill leachates. SPF reactions were performed in tubular photoreactors with CPCs at lab-scale (simulated solar light) and pilot-scale (natural sunlight). Considering the experimental conditions selected for this work, the formation of insoluble HA-Fe3+ complexes was observed. Thus, to avoid HA precipitation, oxalic acid (Ox) was added, since Fe3+ -Ox complexes present a higher stability constant...
March 15, 2018: Environmental Science and Pollution Research International
Jiaqi Zhang, Zipeng Xing, Jiayi Cui, Zhenzi Li, Siyu Tan, Junwei Yin, Jinlong Zou, Qi Zhu, Wei Zhou
Herein, C,N co-doped porous TiO2 hollow sphere visible light photocatalysts were fabricated using biocompatible N-lauroyl-l-glutamic acid as a doped precursor and soft-template by a mild and facile self-assembly soft-template method, followed by calcination at 550 °C in air. The structure, morphology, and surface elemental composition were characterized in detail by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy...
March 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
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"