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https://www.readbyqxmd.com/read/28441539/a-quantum-chemical-insight-into-the-tunable-fluorescence-color-and-distinct-photoisomerization-mechanisms-between-a-novel-esipt-fluorophore-and-its-protonated-form
#1
Huijuan Yuan, Songyan Feng, Keke Wen, Qiuling Zhu, Beibei An, Xugeng Guo, Jinglai Zhang
Enol-keto proton tautomerization and cis-trans isomerization reactions of a novel excited-state intramolecular proton transfer (ESIPT) fluorophore of BTImP and its protonated form (BTImP(+)) were explored using density functional theory/time-dependent density functional theory (DFT/TD-DFT) computational methods with a B3LYP hybrid functional and the 6-31+G(d,p) basis set. In addition, the absorption and fluorescence spectra were calculated at the TD-B3LYP/6-31+G(d,p) level of theory. Our results reveal that both BTImP and BTImP(+) can undergo an ultrafast ESIPT reaction, giving rise to the single fluorescence emission with different fluorescence colors, which are nicely consistent with the experimental findings...
April 19, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28441074/assessing-lebanese-bilingual-children-the-use-of-cross-linguistic-lexical-tasks-in-lebanese-arabic
#2
Christel Khoury Aouad Saliby, Christophe Dos Santos, Edith Kouba Hreich, Camille Messarra
Since norms for vocabulary acquisition in Lebanese bilingual children (L1: Lebanese, L2: French and/or English) do not yet exist, clinical assessment based on normative data and using appropriate tools remains difficult for speech and language therapists. The current study focuses on exploring and comparing lexical performances of typically developing Lebanese bilingual children (32 Bi-TD, aged 5;7 to 6;9) and those with specific language impairment (10 Bi-SLI, aged 5;9 to 7;10), using cross-linguistic lexical tasks (LITMUS-CLT, COST Action IS0804, 2011) in Lebanese Arabic language (CLT-LB), specific to the Lebanese context...
April 25, 2017: Clinical Linguistics & Phonetics
https://www.readbyqxmd.com/read/28440111/quality-of-life-outcomes-in-a-pediatric-thalassemia-population-in-egypt
#3
Soheir Adam, Hanan Afifi, Manal Thomas, Phoebe Magdy, Ghada El-Kamah
Thalassemia is a disorder of hemoglobin (Hb) synthesis characterized by chronic hemolysis. In β-thalassemias major (β-TM), patients require regular transfusion at an early age due to severe anemia. Subsequently, intensive chelation therapy is initiated to mitigate the effects of the resultant iron overload. Clinical disease burden and the demanding treatment can affect health-related quality of life (HRQoL) outcomes in this population. The aim of this study was to assess HRQoL outcomes in Egyptian pediatric thalassemia patients...
April 25, 2017: Hemoglobin
https://www.readbyqxmd.com/read/28437666/attentional-control-of-emotional-interference-in-children-with-adhd-and-typically-developing-children-an-emotional-n-back-study
#4
Thomas Villemonteix, Ivo Marx, Mathilde Septier, Christoph Berger, Thomas Hacker, Sara Bahadori, Eric Acquaviva, Isabelle Massat
Emotional interference control refers to the ability to remain focused on goal-oriented processes when confronted with disrupting but irrelevant emotional stimuli, a process that may be impaired in children and adults with attention deficit/hyperactivity disorder (ADHD). However, emotional interference levels are known to be associated with trait anxiety, and patients with ADHD often display elevated levels of trait anxiety, such as these may have confounded previous findings of decreased emotional interference control in this population...
April 18, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28437623/selective-scene-perception-deficits-in-a-case-of-topographical-disorientation
#5
Jessica Robin, Matthew X Lowe, Sara Pishdadian, Josée Rivest, Jonathan S Cant, Morris Moscovitch
Topographical disorientation (TD) is a neuropsychological condition characterized by an inability to find one's way, even in familiar environments. One common contributing cause of TD is landmark agnosia, a visual recognition impairment specific to scenes and landmarks. Although many cases of TD with landmark agnosia have been documented, little is known about the perceptual mechanisms which lead to selective deficits in recognizing scenes. In the present study, we test LH, a man who exhibits TD and landmark agnosia, on measures of scene perception that require selectively attending to either the configural or surface properties of a scene...
April 2, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28436342/comparison-of-neural-substrates-of-temporal-discounting-between-youth-with-autism-spectrum-disorder-and-with-obsessive-compulsive-disorder
#6
C O Carlisi, L Norman, C M Murphy, A Christakou, K Chantiluke, V Giampietro, A Simmons, M Brammer, D G Murphy, D Mataix-Cols, K Rubia
BACKGROUND: Autism spectrum disorder (ASD) and obsessive-compulsive disorder (OCD) share abnormalities in hot executive functions such as reward-based decision-making, as measured in the temporal discounting task (TD). No studies, however, have directly compared these disorders to investigate common/distinct neural profiles underlying such abnormalities. We wanted to test whether reward-based decision-making is a shared transdiagnostic feature of both disorders with similar neurofunctional substrates or whether it is a shared phenotype with disorder-differential neurofunctional underpinnings...
April 24, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28435250/sl2b-aptamer-and-folic-acid-dual-targeting-dna-nanostructures-for-synergic-biological-effect-with-chemotherapy-to-combat-colorectal-cancer
#7
Pengchao Sun, Nan Zhang, Yafang Tang, Yanan Yang, Xiao Chu, Yongxing Zhao
DNA nanostructures prepared by self-assembly possess good stability, high biocompatibility, and low immunogenicity as drug delivery vehicles. In this work, DNA tetrahedron (TD) was constructed and modified with SL2B aptamer (S) and folic acid (F). TD possessed a small diameter (~6 nm) and entered into the nucleus quickly. SL2B aptamer can inhibit cancer cell growth by disturbing vascular endothelial growth factor/Notch signaling pathways. To explore the effect of SL2B number on colorectal cancer inhibition, SL2B multimers (dimer, trimer, and tetramer) were constructed by functionalization of TD with different numbers of SL2B...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28434395/would-adults-with-autism-be-less-likely-to-bury-the-survivors-an-eye-movement-study-of-anomalous-text-reading
#8
Sheena K Au-Yeung, Johanna K Kaakinen, Simon P Liversedge, Valerie Benson
In a single eye movement experiment we investigated the effects of context on the time course of local and global anomaly processing during reading in adults with Autism Spectrum Disorder (ASD). In one condition short paragraph texts contained anomalous target words. Detection of the anomaly was only possible through evaluation of word meaning in relation to the global context of the whole paragraph (Passage Level Anomalies). In another condition the anomaly could be detected via computation of a local thematic violation within a single sentence embedded in the paragraph (Sentence Level Anomalies)...
April 24, 2017: Quarterly Journal of Experimental Psychology: QJEP
https://www.readbyqxmd.com/read/28434272/wideband-acoustic-immittance-in-children-with-down-syndrome-prediction-of-middle-ear-dysfunction-conductive-hearing-loss-and-patent-pe-tubes
#9
Lisa L Hunter, Douglas H Keefe, M Patrick Feeney, David K Brown, Jareen Meinzen-Derr, Alaaeldin M Elsayed, Julia M Amann, Vairavan Manickam, Denis Fitzpatrick, Sally R Shott
OBJECTIVE: The purpose of this study was to evaluate pressurised wideband acoustic immittance (WAI) tests in children with Down syndrome (DS) and in typically developing children (TD) for prediction of conductive hearing loss (CHL) and patency of pressure equalising tubes (PETs). DESIGN: Audiologic diagnosis was determined by audiometry in combination with distortion-product otoacoustic emissions, 0.226 kHz tympanometry and otoscopy. WAI results were compared for ears within diagnostic categories (Normal, CHL and PET) and between groups (TD and DS)...
April 22, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28433803/colorimetric-and-fluorimetric-response-of-salicylaldehyde-dithiosemicarbazone-towards-fluoride-cyanide-and-copper-ions-spectroscopic-and-td-dft-studies
#10
Vengayil K Harikrishnan, Sabeel M Basheer, Nithin Joseph, Anandaram Sreekanth
The sensing mechanism of salicylaldehyde phenyldithiosemicarbazone (SDTSC) chemosensor has been investigated by spectroscopic and TD-DFT methods. The SDTSC shows colourimetric and spectral changes towards fluoride, cyanide and copper ions. The interaction between SDTSC with fluoride, cyanide and copper ions was examined through their absorption and fluorescence behaviour, and found that SDTSC has more sensing ability towards Cu(2+) ion than CN(-) and F(-) ions. The (1)H NMR titration with SDTSC and F(-) gives the structural changes in the sensing process...
April 12, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28433416/static-postural-control-in-youth-with-osteogenesis-imperfecta-type-i
#11
Annie Pouliot-Laforte, Martin Lemay, Frank Rauch, Louis-Nicolas Veilleux
OBJECTIVE: To assess static postural control in eyes-open and eyes-closed conditions in individuals with osteogenesis imperfecta (OI) type I as compared to typically developing (TD) individuals. The second aim was to explore the relation between postural control and lower-limbs muscle function. DESIGN: This is a cross-sectional study. SETTINGS: The study was carried out in the outpatient department of a pediatric orthopedic hospital. PARTICIPANTS: 22 individuals with OI type I (mean age [range]: 13...
April 19, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28432843/vitamin-b1-in-critically-ill-patients-needs-and-challenges
#12
REVIEW
Jake T B Collie, Ronda F Greaves, Oliver A H Jones, Que Lam, Glenn M Eastwood, Rinaldo Bellomo
BACKGROUND: Thiamine has a crucial role in energy production, and consequently thiamine deficiency (TD) has been associated with cardiac failure, neurological disorders, oxidative stress (lactic acidosis and sepsis) and refeeding syndrome (RFS). This review aims to explore analytical methodologies of thiamine compound quantification and highlight similarities, variances and limitations of current techniques and how they may be relevant to patients. CONTENT: An electronic search of Medline, PubMed and Embase databases for original articles published in peer-reviewed journals was conducted...
April 22, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28431688/thermal-desorption-gas-chromatographic-methodology-for-the-determination-of-residual-solvents-in-mesoporous-silica
#13
Adissu Alemayehu Asfaw, Kris Wolfs, Ann Van Schepdael, Erwin Adams
In this work, thermal desorption-gas chromatography-flame ionization detection (TD-GC-FID) was adapted to enable the determination of residual solvents (RS) in mesoporous silica (MPSi). MPSi is often utilized in various pharmaceutical formulations or drug delivery systems and the accurate determination of RS is an important part of pharmaceutical quality control. Seven commonly used solvents (methanol, ethanol, acetone, isopropanol, dichloromethane, tetrahydrofuran and hexafluoroisopropanol) were evaluated in combination with 3 types of MPSi having pore sizes of 2-3, 15 and 25nm...
April 12, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28431312/melatonin-charge-transfer-complex-with-2-3-dichloro-5-6-dicyano-1-4-benzoquinone-molecular-structure-dft-studies-thermal-analyses-evaluation-of-biological-activity-and-utility-for-determination-of-melatonin-in-pure-and-dosage-forms
#14
Gehad G Mohamed, Maher M Hamed, Nadia G Zaki, Mohamed M Abdou, Marwa El-Badry Mohamed, Abanoub Mosaad Abdallah
A simple, accurate and fast spectrophotometric method for the quantitative determination of melatonin (ML) drug in its pure and pharmaceutical forms was developed based on the formation of its charge transfer complex with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) as an electron acceptor. The different conditions for this method were optimized accurately. The Lambert-Beer's law was found to be valid over the concentration range of 4-100μgmL(-1) ML. The solid form of the CT complex was structurally characterized by means of different spectral methods...
April 4, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28428786/challenge-of-humans-with-wild-type-salmonella-enterica-serovar-typhi-elicits-changes-in-the-activation-and-homing-characteristics-of-mucosal-associated-invariant-t-cells
#15
Rosângela Salerno-Goncalves, David Luo, Stephanie Fresnay, Laurence Magder, Thomas C Darton, Claire Jones, Claire S Waddington, Christoph J Blohmke, Brian Angus, Myron M Levine, Andrew J Pollard, Marcelo B Sztein
Gastrointestinal infections by Salmonella enterica serovar Typhi (S. Typhi) are rare in industrialized countries. However, they remain a major public health problem in the developing world with an estimated 26.9 million new cases annually and significant mortality when untreated. Recently, we provided the first direct evidence that CD8(+) MAIT cells are activated and have the potential to kill cells exposed to S. Typhi, and that these responses are dependent on bacterial load. However, MAIT cell kinetics and function during bacterial infections in humans remain largely unknown...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28428624/attentional-selection-predicts-rapid-automatized-naming-ability-in-chinese-speaking-children-with-adhd
#16
Encong Wang, Meirong Sun, Ye Tao, Xiaoyi Gao, Jialiang Guo, Chenguang Zhao, Hui Li, Qiujin Qian, Zhanliang Wu, Yufeng Wang, Li Sun, Yan Song
Children with attention-deficit/hyperactivity disorder (ADHD) are reported to have a significantly higher risk of showing reading difficulties or disorders. Here, we aimed to identify the relationship between electroencephalographic (EEG) marker of spatial attention and reading ability in Chinese children with ADHD. First, we demonstrated that rapid automatized naming (RAN) is a strong predictor of reading ability in Chinese-speaking children. Then, EEG data of 9-to 15-year-old children with ADHD (n = 38) and typically developing (TD) controls (n = 36) were collected while the children performed a classical visual search task...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28428523/-efficacy-of-total-debranching-thoracic-endovascular-aortic-repair-for-the-re-operation-of-aortic-arch-aneurysm
#17
Kyohei Ueno, Megumu Kanno, Hirofumi Midorikawa, Gaku Takinami, Rie Kageyama
Thoracic endovascular aortic repair (TEVAR) combined with all-neck-branch reconstruction (total debranching TEVAR)[td TEVAR] is applied to aortic arch aneurysms as a minimally invasive procedure to improve treatment results. We report the initial and long-term results of td TEVAR for the reoperation of aortic arch aneurysm. By September 2016, td TEVAR for reoperation had been applied in 5 cases. The reasons for the reoperation were dilation of the arch aneurysm after ascending aorta replacement in 4 cases and localized dissection of the proximal landing zone after zone 2 TEVAR in 1 case...
April 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28426263/using-contingent-reinforcement-to-augment-muscle-activation-after-perinatal-brachial-plexus-injury-a-pilot-study
#18
S V Duff, B Sargent, J J Kutch, J Berggren, B E Leiby, L Fetters
AIM: Examine the feasibility of increasing muscle activation with electromyographically (EMG)-triggered musical-video as reinforcement for children with perinatal brachial plexus injury (PBPI). METHODS: Six children with PBPI (9.3 ± 6.3 months; 5 female, 1 male) and 13 typically developing (TD) controls (7.8 ± 3.5 months; 4 female, 9 males) participated. The left arm was affected in 5/6 children with PBPI. We recorded the integral (Vs) of biceps activation with surface EMG during two conditions per arm in one session: (1) 100 second (s) baseline without reinforcement and (2) 300 s reinforcement (musical-video triggered to play with biceps activation above threshold [V])...
April 20, 2017: Physical & Occupational Therapy in Pediatrics
https://www.readbyqxmd.com/read/28426053/improved-spatial-resolution-for-spot-sampling-in-thermal-desorption-atomic-force-microscopy-mass-spectrometry-via-rapid-heating-functions
#19
Suhas Somnath, Stephen Jesse, Gary J Van Berkel, Sergei V Kalinin, Olga S Ovchinnikova
The key to advancing materials is to understand and control their structure and chemistry. However, thorough chemical characterization is challenging since existing techniques characterize only a few properties of the specimen, thereby necessitating multiple measurement platforms to acquire the necessary information. The multimodal combination of atomic force microscopy (AFM) and mass spectrometry (MS) transcends existing analytical capabilities for nanometer scale spatially resolved correlation of the chemical and physical properties of a sample surface...
April 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28424778/estimation-of-time-dependent-reproduction-numbers-for-porcine-reproductive-and-respiratory-syndrome-across-different-regions-and-production-systems-of-the-us
#20
Andréia G Arruda, Moh A Alkhamis, Kimberly VanderWaal, Robert B Morrison, Andres M Perez
Porcine reproductive and respiratory syndrome (PRRS) is, arguably, the most impactful disease for the North American swine industry, due to its known considerable economic losses. The Swine Health Monitoring Project (SHMP) monitors and reports weekly new PRRS cases in 766 sow herds across the US. The time-dependent reproduction number (TD-R) is a measure of a pathogen's transmissibility. It may serve to capture and report PRRS virus (PRRSV) spread at the regional and system levels. The primary objective of the study here was to estimate the TD-R values for PRRSV using regional and system-level PRRS data, and to contrast it with commonly used metrics of disease, such as incidence estimates and space-time clusters...
2017: Frontiers in Veterinary Science
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