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https://www.readbyqxmd.com/read/28454171/depth-resolution-enhancement-of-terahertz-deconvolution-by-autoregressive-spectral-extrapolation
#1
Junliang Dong, Alexandre Locquet, D S Citrin
This Letter presents a method for enhancing the depth resolution of terahertz deconvolution based on autoregressive (AR) spectral extrapolation. The terahertz frequency components with a high signal-to-noise ratio (SNR) are modeled with an AR process, and the missing frequency components in the regions with low SNRs are extrapolated based on the AR model. In this way, the entire terahertz frequency spectrum of the impulse response function, corresponding to the material structure, is recovered. This method, which is verified numerically and experimentally, is able to provide a "quasi-ideal" impulse response function and, therefore, greatly enhances the depth resolution for characterizing optically thin layers in the terahertz regime...
May 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28454155/efficient-terahertz-anti-reflection-properties-of-metallic-anti-dot-structures
#2
Kumar Neeraj, Samiran Choudhury, Debanjan Polley, Rakhi Acharya, Jaivardhan Sinha, Anjan Barman, Rajib Kumar Mitra
We report the use of micrometer-sized copper (Cu) anti-dot structures as a novel terahertz (THz) anti-reflection coating (ARC) material and their superior performance over conventionally used metallic (Cu) thin films. Cu anti-dot structures of two different thicknesses (7 and 10 nm) with varying anti-dot diameters (100, 200, and 300 μm, inter-anti-dot separation fixed at 100 μm) are deposited on silicon substrates by RF magnetron sputtering and e-beam evaporation. The anti-reflection performance of these samples is studied in the frequency range of 0...
May 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28453895/a-1-2-addition-pathway-for-c-sp2-h-activation-at-a-dinickel-imide
#3
Ian G Powers, Cholpisit Kiattisewee, Kimberly C Mullane, Eric J Schelter, Christopher Uyeda
A dinickel imido complex is synthesized using a redox-active naphthyridine-diimine supporting ligand. Upon coordination of an external ligand, the Ni2 core is disrupted, triggering an aromatic C-H activation reaction to generate a Ni2(μ-NHAr)(Ar) species. This intermediate is capable of liberating free carbazole and phenanthridine products upon heating or treatment with excess t-BuNC. Collectively, these studies establish a kinetically facile 1,2-addition mechanism for C(sp2)-H activation, taking advantage of cooperative reactivity between two Ni centers...
April 28, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28453707/the-role-of-ar-polyq-tract-in-male-breast-carcinoma-lesson-from-an-sbma-case
#4
G Querin, I Martinelli, C Bertolin, E Pegoraro, M Pennuto, G Sorarù
No abstract text is available yet for this article.
May 1, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28453658/androgen-receptor-agonists-increase-lean-mass-improve-cardiopulmonary-functions-and-extend-survival-in-preclinical-models-of-duchenne-muscular-dystrophy
#5
Suriyan Ponnusamy, Ryan D Sullivan, Dahui You, Nadeem Zafar, Chuan He Yang, Thirumagal Thiyagarajan, Daniel L Johnson, Maron L Barrett, Nikki J Koehler, Mayra Star, Erin J Stephenson, Dave Bridges, Stephania A Cormier, Lawrence M Pfeffer, Ramesh Narayanan
Duchenne muscular dystrophy (DMD) is a neuromuscular disease that predominantly affects boys as a result of mutation(s) in the dystrophin gene. DMD is characterized by musculoskeletal and cardiopulmonary complications, resulting in shorter life-span. Boys afflicted by DMD typically exhibit symptoms within 3-5 years of age and declining physical functions before attaining puberty. We hypothesized that rapidly deteriorating health of pre-pubertal boys with DMD could be due to diminished anabolic actions of androgens in muscle, and that intervention with an androgen receptor (AR) agonist will reverse musculoskeletal complications and extend survival...
April 27, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28449552/effect-of-proparacaine-in-a-mouse-model-of-allergic-rhinitis
#6
Hwan Soo Kim, Sulmui Won, Eu Kyoung Lee, Yoon Hong Chun, Jong-Seo Yoon, Jin Tack Kim, Hyun Hee Kim
Objectives: Lidocaine, a local anaesthetic is a treatment option in uncontrolled asthma due to its immunomodulatory effects. In the present study, proparacaine (PPC), a derivative of lidocaine was examined for its therapeutic application in a mouse model of allergic rhinitis. Methods: The mice were grouped into 4 groups: control group, allergic rhinitis (AR) group, ciclesonide (CIC) group, and PPC group. Nasal symptom scores, eosinophil counts, goblet cell counts, and mast cells counts in the nasal mucosa were measured...
April 28, 2017: Clinical and Experimental Otorhinolaryngology
https://www.readbyqxmd.com/read/28449551/a-survey-of-korean-physicians-prescription-patterns-for-allergic-rhinitis
#7
Min Young Seo, Dong-Kyu Kim, Hye Mi Jee, Young Min Ahn, Yong Min Kim, Sang Duk Hong
Objectives: The aim of this study was to compare the prescription patterns according to characteristics of physicians using a survey distributed amongst physicians in Korea. Methods: We surveyed the prescription patterns for allergic rhinitis (AR) of the members of the Korean Academy of Asthma, Allergy and Clinical Immunology (KAAACI) and the Korean Association of Otorhinolaryngologists (KAO). Questionnaire contained 4 categories with 28 queries. 448 physicians including 98 internal medicine (IM), 113 pediatrics (PED), and 237 otorhinolaryngology (ENT) were responded...
April 28, 2017: Clinical and Experimental Otorhinolaryngology
https://www.readbyqxmd.com/read/28449195/reliable-estimation-of-inhibitory-efficiency-to-anticipate-choose-or-simply-react
#8
Inge Leunissen, Bram B Zandbelt, Zrinka Potocanac, Stephan P Swinnen, James P Coxon
Response inhibition is an important executive process studied by clinical and experimental psychologists, neurophysiologists, and cognitive neuroscientists alike. Stop-signal paradigms are popular because they are grounded in a theory that provides methods to estimate the latency of an unobservable process: the stop-signal reaction time (SSRT). Critically, SSRT estimates can be biased by skew of the response time distribution and gradual slowing over the course of the experiment. Here, we present a series of experiments that directly compare three common stop-signal paradigms that differ in the distribution of response times...
April 27, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28448955/ionization-spectroscopies-and-theoretical-calculations-of-cis-and-trans-3-fluoro-n-methylaniline-arn-n-1-2-van-der-waals-clusters-structures-and-binding-energies
#9
Lijuan Zhang, Dazhi Li, Min Cheng, Yikui Du, Qihe Zhu
The ab initio and dispersion-corrected density functional theory (DFT) calculations of the van der Waals (vdW) clusters of cis and trans 3-fluoro-N-methylaniline-Arn (3FNMA-Arn) (n=1,2) predict that, for cis and trans 3FNMA-Ar1 clusters, the π-bound geometry with the Ar atom sitting over the ring is the global minimum in both neutral and cationic states, while for cis and trans 3FNMA-Ar2 clusters, the [π|π]-bound sandwich structure with two Ar ligands occupying nearly equivalent π-bound positions above and below the ring plane is the global minimum...
April 18, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28448151/methoxysulfinyl-radical-ch3oso-gas-phase-generation-photochemistry-and-oxidation
#10
Qifan Liu, Zhuang Wu, Jian Xu, Yan Lu, Hongmin Li, Xiaoqing Zeng
Methylsulfoxide radicals CH3SOx (x = 1-4) are key reactive sulfur species (RSS) in the atmospheric oxidation of volatile organic sulfur compounds (VOSCs). Through flash vacuum pyrolysis (FVP) of trifluoromethanesulfinic acid methyl ester CF3S(O)OCH3 at 1000 K, the methoxysulfinyl radical CH3OSO has been generated in the gas phase and subsequently characterized in cryogenic N2, Ar, and Ne matrices by IR spectroscopy. Upon 266 nm laser irradiation, CH3OSO efficiently isomerizes to the less stable methylsulfonyl radical CH3SO2 in matrices without noticeable decomposition...
April 27, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28447789/exploring-the-role-of-n-6-substituents-in-potent-dual-acting-5-c-ethyl-tetrazolyl-adenosine-derivatives-synthesis-binding-functional-assays-and-antinociceptive-effects-in-mice
#11
Riccardo Petrelli, Mirko Scortichini, Sonja Kachler, Serena Boccella, Carmen Cerchia, Ilaria Torquati, Fabio Del Bello, Daniela Salvemini, Ettore Novellino, Livio Luongo, Sabatino Maione, Kenneth A Jacobson, Antonio Lavecchia, Karl-Norbert Klotz, Loredana Cappellacci
Structural determinants of affinity of N(6)-substituted-5'-C-(ethyl-tetrazol-2-yl)-adenosine and 2-chloro-adenosine derivatives at adenosine receptor (AR) subtypes were studied with binding and molecular modeling. Small N(6)-cycloalkyl and 3-halo-benzyl groups furnished potent dual acting A1AR agonists and A3AR antagonists. 4 was the most potent dual acting human (h) A1AR agonist (Ki = 0.45 nM) and A3AR antagonist (Ki = 0.31 nM) and highly selective versus A2A; 11 and 26 were most potent at both h and rat (r) A3AR...
April 27, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28447762/inhibition-of-aldose-reductase-ameliorates-ethanol%C3%A2-induced-steatosis-in-hepg2-cells
#12
Longxin Qiu, Chengchao Cai, Xiangqian Zhao, Yan Fang, Weibiao Tang, Chang Guo
Aldose reductase (AR) expression is increased in liver tissue of patients with ethanol‑induced liver disease. However, the exact role of AR in the development of ethanol‑induced liver disease has yet to be elucidated. The present study aimed to determine the effect of an AR inhibitor on ethanol‑induced steatosis in HepG2 cells and to identify possible underlying molecular mechanisms. Steatosis was induced in HepG2 cells by stimulating cells with 100 mM absolute ethanol for 48 h. Oil Red O staining was used to detect the lipid droplet accumulation in cells...
March 10, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28447621/direct-involvement-of-androgen-receptor-in-oxytocin-gene-expression-possible-relevance-for-mood-disorders
#13
Dan Dai, Qiao-Chu Li, Qiong-Bin Zhu, Shao-Hua Hu, Rawien Balesar, Dick Swaab, Ai-Min Bao
Oxytocin (OXT), synthesized in the hypothalamic paraventricular nucleus (PVN) and then released into different brain areas, may play a crucial role in various behaviors and neuropsychiatric disorders, including depression. Testosterone has been proposed by clinical studies to have the opposite effect of oxytocin in these disorders. We began by studying, in the postmortem hypothalamus of fifteen patients with mood disorders and fifteen matched controls, the expression of OXT in the PVN by means of immunocytochemistry (ICC) and the co-localization of OXT and androgen receptor (AR) by means of double labeling ICC...
April 27, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28447607/genome-wide-identification-characterization-and-expression-profile-of-aquaporin-gene-family-in-flax-linum-usitatissimum
#14
S M Shivaraj, Rupesh K Deshmukh, Rhitu Rai, Richard Bélanger, Pawan K Agrawal, Prasanta K Dash
Membrane intrinsic proteins (MIPs) form transmembrane channels and facilitate transport of myriad substrates across the cell membrane in many organisms. Majority of plant MIPs have water transporting ability and are commonly referred as aquaporins (AQPs). In the present study, we identified aquaporin coding genes in flax by genome-wide analysis, their structure, function and expression pattern by pan-genome exploration. Cross-genera phylogenetic analysis with known aquaporins from rice, arabidopsis, and poplar showed five subgroups of flax aquaporins representing 16 plasma membrane intrinsic proteins (PIPs), 17 tonoplast intrinsic proteins (TIPs), 13 NOD26-like intrinsic proteins (NIPs), 2 small basic intrinsic proteins (SIPs), and 3 uncharacterized intrinsic proteins (XIPs)...
April 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28447482/quantitative-potassium-measurements-with-laser-induced-breakdown-spectroscopy-using-low-energy-lasers-application-to-in-situ-k-ar-geochronology-for-planetary-exploration
#15
Yuichiro Cho, Misa Horiuchi, Kazuo Shibasaki, Shingo Kameda, Seiji Sugita
In situ radiogenic isotope measurements to obtain the absolute age of geologic events on planets are of great scientific value. In particular, K-Ar isochrons are useful because of their relatively high technical readiness and high accuracy. Because this isochron method involves spot-by-spot K measurements using laser-induced breakdown spectroscopy (LIBS) and simultaneous Ar measurements with mass spectrometry, LIBS measurements are conducted under a high vacuum condition in which emission intensity decreases significantly...
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28447477/simultaneous-visualization-of-hydrogen-peroxide-and-water-concentrations-using-photofragmentation-laser-induced-fluorescence
#16
Kajsa Larsson, Marcus Aldén, Joakim Bood
A concept based on photofragmentation laser-induced fluorescence (PFLIF) is for the first time demonstrated for simultaneous detection of hydrogen peroxide (H2O2) and water (H2O) vapor in various mixtures containing the two constituents in a bath of argon gas. A photolysis laser pulse at 248 nm dissociates H2O2 into OH fragments, whereupon a probe pulse, delayed 100 ns and tuned to an absorption line in the A(2)Σ(+) (v = 1) ← X(2)Π(v = 0) band of OH near 282 nm, induces fluorescence. The total OH fluorescence reflects the H2O2 concentration, while its spectral shape is utilized to determine the H2O concentration via a model predicting the ratio between the fluorescence intensities of the A(2)Σ(+) (v = 1) → X(2)Π(v = 1) and the A(2)Σ(+) (v = 0) → X(2)Π(v = 0) bands...
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28446719/androgen-receptor-expression-identifies-patient-with-favorable-outcome-in-operable-triple-negative-breast-cancer
#17
Xiao-Qing Hu, Wei-Li Chen, Hai-Guang Ma, Ke Jiang
In this study we sought to investigate the prevalence and prognostic value of androgen receptor (AR) status in operable triple-negative breast cancer (TNBC) patients. We collected the clinical data of 360 patients with TNBC, and found a positivity AR expression of 31.4% with a cut-off value of 10%. Tumors expressing the negative CK5/6 (P=0.013) and low Ki-67 (P=0.007) are more likely to have positive AR. In multivariate survival analysis, AR expression is correlated with increased DFS (HR=0.467, 95%CI 0.271-0...
April 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28446521/comparison-of-ticagrelor-pharmacokinetics-and-pharmacodynamics-in-stemi-and-nstemi-patients-pinpoint-protocol-for-a-prospective-observational-single-centre-study
#18
Piotr Adamski, Małgorzata Ostrowska, Joanna Sikora, Karolina Obońska, Katarzyna Buszko, Magdalena Krintus, Grażyna Sypniewska, Michał Piotr Marszałł, Marek Koziński, Jacek Kubica
INTRODUCTION: The most common classification of acute myocardial infarction (AMI) is based on electrocardiographic findings and distinguishes ST-elevation myocardial infarction (STEMI) and non-ST-elevation myocardial infarction (NSTEMI). Both types of AMI differ concerning their epidemiology, clinical approach and early outcomes. Ticagrelor is a P2Y12 receptor inhibitor, constituting the first-line treatment for STEMI and NSTEMI. According to available data, STEMI may be associated with lower plasma concentration of ticagrelor in the first hours of AMI, but currently there are no studies directly comparing ticagrelor pharmacokinetics or antiplatelet effect in patients with STEMI versus NSTEMI...
April 26, 2017: BMJ Open
https://www.readbyqxmd.com/read/28445819/structural-and-spectroscopic-properties-of-complexes-formed-between-hncs-and-so2-in-low-temperature-matrices
#19
Justyna Krupa, Maria Wierzejewska
Matrix isolation FTIR spectroscopy has been combined with quantum chemical calculations in the aim to characterize complexes of isothiocyanic acid HNCS with SO2. The geometries of the 1:1, 1:2 and 2:1 complexes were optimized at the MP2 and DFT (B3LYPD3) levels of theory with the 6-311++G(3df,3pd) basis set. Five different HNCS⋯SO2 structures of the 1:1 stoichiometry were optimized. Three of them involve a weak NH⋯O hydrogen bond whereas two other geometries are stabilized by van der Waals interactions of various types...
April 19, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28444884/novel-urinary-alkylresorcinol-metabolites-as-biomarkers-of-whole-grain-intake-in-free-living-swedish-adults
#20
Roksana Wierzbicka, Galia Zamaratskaia, Afaf Kamal-Eldin, Rikard Landberg
SCOPE: Most studies on the role of whole grain for health rely on self-reported intake data, which are prone to measurement errors. There is a need for dietary biomarkers that can provide an objective measure of intake. Alkylresorcinols (AR) and their main metabolites 3,5-dihydroxybenzoic acid (DHBA) and 3-(3,5-dihydroxyphenyl)-propanoic acid (DHPPA) have been proposed as biomarkers for whole grain (WG) wheat and rye intake. METHODS AND RESULTS: The medium-term reproducibility and relative validity of four putative urinary AR metabolites (3,5-dihydroxycinnamic acid (DHCA), 5-(3,5-dihydroxyphenyl) pentanoic acid (DHPPTA), 2-(3,5-dihydroxybenzamido)acetic acid (DHBA-glycine) and 3,5-dihydroxycinnamic acid amide (DHCA-amide)) as biomarkers for WG intake were investigated...
April 26, 2017: Molecular Nutrition & Food Research
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