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https://www.readbyqxmd.com/read/28239736/ferrocene-diketopyrrolopyrrole-based-small-molecule-donors-for-bulk-heterojunction-solar-cells
#1
Yuvraj Patil, Rajneesh Misra, Manish Kumar Singh, Ganesh D Sharma
A symmetrical D-π-A-π-D type small molecule consisting of thiophene flanked diketopyrrolopyrrole (DPP) as a core and an end capping ferrocene donor linked by an ethynyl bridge, denoted as Fc-DPP-Fc, was synthesized and its optical, thermal and electrochemical properties were investigated in order to explore its potential applicability as a donor for solution processed bulk heterojunction solar cells. The photophysical and electrochemical properties of this small molecule showed strong charge transfer interaction between the ferrocene donor and the DPP acceptor, and it is found to be suitable as a small molecule donor along with PC71BM as an electron acceptor for solution processed bulk heterojunction organic solar cells (OSCs)...
February 27, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28239676/intact-ventral-striatal-prediction-error-signaling-in-medicated-schizophrenia-patients
#2
Adam J Culbreth, Andrew Westbrook, Ziye Xu, Deanna M Barch, James A Waltz
BACKGROUND: Midbrain dopaminergic neurons code a computational quantity, reward prediction error (RPE), which has been causally related to learning. Recently, this insight has been leveraged to link phenomenological and biological levels of understanding in psychiatric disorders, such as schizophrenia. However, results have been mixed, possibly due to small sample sizes. Here we present results from two studies with relatively large Ns to assess VS RPE in schizophrenia. METHODS: In the current study we analyzed data from two independent studies, involving a total of 87 chronic medicated schizophrenia patients and 61 controls...
September 2016: Biological Psychiatry: Cognitive Neuroscience and Neuroimaging
https://www.readbyqxmd.com/read/28239628/cubic-meter-volume-optical-coherence-tomography
#3
Zhao Wang, Benjamin Potsaid, Long Chen, Chris Doerr, Hsiang-Chieh Lee, Torben Nielson, Vijaysekhar Jayaraman, Alex E Cable, Eric Swanson, James G Fujimoto
Optical coherence tomography (OCT) is a powerful three-dimensional (3D) imaging modality with micrometer-scale axial resolution and up to multi-GigaVoxel/s imaging speed. However, the imaging range of high-speed OCT has been limited. Here, we report 3D OCT over cubic meter volumes using a long coherence length, 1310 nm vertical-cavity surface-emitting laser and silicon photonic integrated circuit dual-quadrature receiver technology combined with enhanced signal processing. We achieved 15 µm depth resolution for tomographic imaging at a 100 kHz axial scan rate over a 1...
December 2016: Optica
https://www.readbyqxmd.com/read/28239544/measures-of-metabolism-and-complexity-in-the-brain-of-patients-with-disorders-of-consciousness
#4
Olivier Bodart, Olivia Gosseries, Sarah Wannez, Aurore Thibaut, Jitka Annen, Melanie Boly, Mario Rosanova, Adenauer G Casali, Silvia Casarotto, Giulio Tononi, Marcello Massimini, Steven Laureys
BACKGROUND: Making an accurate diagnosis in patients with disorders of consciousness remains challenging. (18)F-fluorodeoxyglucose (FDG)-PET has been validated as a diagnostic tool in this population, and allows identifying unresponsive patients with a capacity for consciousness. In parallel, the perturbational complexity index (PCI), a new measure based on the analysis of the electroencephalographic response to transcranial magnetic stimulation, has also been suggested as a tool to distinguish between unconscious and conscious states...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28239444/locomotory-control-in-amphioxus-larvae-new-insights-from-neurotransmitter-data
#5
EDITORIAL
Thurston Lacalli, Simona Candiani
Amphioxus larvae have a midbrain-level locomotory control center whose overall organization is known from serial TEM reconstructions. How it functions has been a puzzle, owing to uncertainty as to the transmitters used by each class of neurons, but this has recently become clearer. We summarize what is now known, and correct past misconceptions: The large paired neurons at the core of the control center are glutamatergic, and hence excitatory, the commissural neurons are GABAergic, hence probably inhibitory, and both motoneurons and ipsilateral projection neurons are cholinergic, suggesting that the latter, a class of interneurons, may be derived evolutionarily from the former...
2017: EvoDevo
https://www.readbyqxmd.com/read/28239415/coupling-gene-regulatory-patterns-to-bioprocess-conditions-to-optimize-synthetic-metabolic-modules-for-improved-sesquiterpene-production-in-yeast
#6
Bingyin Peng, Manuel R Plan, Alexander Carpenter, Lars K Nielsen, Claudia E Vickers
BACKGROUND: Assembly of heterologous metabolic pathways is commonly required to generate microbial cell factories for industrial production of both commodity chemicals (including biofuels) and high-value chemicals. Promoter-mediated transcriptional regulation coordinates the expression of the individual components of these heterologous pathways. Expression patterns vary during culture as conditions change, and this can influence yeast physiology and productivity in both positive and negative ways...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28239411/reliable-measurement-of-e-coli-single-cell-fluorescence-distribution-using-a-standard-microscope-set-up
#7
Marilisa Cortesi, Lucia Bandiera, Alice Pasini, Alessandro Bevilacqua, Alessandro Gherardi, Simone Furini, Emanuele Giordano
BACKGROUND: Quantifying gene expression at single cell level is fundamental for the complete characterization of synthetic gene circuits, due to the significant impact of noise and inter-cellular variability on the system's functionality. Commercial set-ups that allow the acquisition of fluorescent signal at single cell level (flow cytometers or quantitative microscopes) are expensive apparatuses that are hardly affordable by small laboratories. METHODS: A protocol that makes a standard optical microscope able to acquire quantitative, single cell, fluorescent data from a bacterial population transformed with synthetic gene circuitry is presented...
2017: Journal of Biological Engineering
https://www.readbyqxmd.com/read/28239405/long-term-intake-of-saccharin-decreases-post-absortive-energy-expenditure-at-rest-and-is-associated-to-greater-weight-gain-relative-to-sucrose-in-wistar-rats
#8
Denise Entrudo Pinto, Kelly Carraro Foletto, Ramiro Barcos Nunes, Pedro Dal Lago, Marcello Casaccia Bertoluci
BACKGROUND: Non-nutritive sweeteners (NNS) have been associated with increased prevalence of obesity. In previous studies, we demonstrated that saccharin could induce an increase in weight gain either when compared to sucrose or to a non-sweetened control at a similar total caloric intake. These data raised the hypothesis that reduced energy expenditure (EE) could be a potential mechanism explaining greater weight gain with saccharin use in rats. The aim of the present study was to compare long-term energy expenditure at rest between rats using saccharin or sucrose and correlate it with weight gain...
2017: Nutrition & Metabolism
https://www.readbyqxmd.com/read/28239169/cardiovascular-disease-in-haemodialysis-role-of-the-intravascular-innate-immune-system
#9
REVIEW
Kristina N Ekdahl, Inga Soveri, Jöns Hilborn, Bengt Fellström, Bo Nilsson
Haemodialysis is a life-saving renal replacement modality for end-stage renal disease, but this therapy also represents a major challenge to the intravascular innate immune system, which is comprised of the complement, contact and coagulation systems. Chronic inflammation is strongly associated with cardiovascular disease (CVD) in patients on haemodialysis. Biomaterial-induced contact activation of proteins within the plasma cascade systems occurs during haemodialysis and initially leads to local generation of inflammatory mediators on the biomaterial surface...
February 27, 2017: Nature Reviews. Nephrology
https://www.readbyqxmd.com/read/28238824/effect-of-chronic-stress-during-adolescence-in-prefrontal-cortex-structure-and-function
#10
Otávio Augusto de Araújo Costa Folha, Carlomagno Pacheco Bahia, Gisele Priscila Soares de Aguiar, Anderson Manoel Herculano, Nicole Leite Galvão Coelho, Maria Bernardete Cordeiro de Sousa, Victor Kenji Medeiros Shiramizu, Ana Cecília Galvão Menezes, Walther Carvalho, Antonio Pereira
Critical periods of plasticity (CPPs) are defined by intervals of postnatal brain development wherein neuronal circuits are most susceptible to environmental influences. The CPP of the prefrontal cortex (PFC), which controls executive functions, extends up to early adulthood and, like other cortical areas, reflects the maturation of perineuronal nets (PNNs) surrounding the cell bodies of specialized inhibitory interneurons. The aim of the present work was to evaluate the effect of chronic stress on the spatiotemporal distribution of PNN(+) neurons in the adolescent's rat PFC and behavior controlled by this cortical area...
February 23, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28238701/deep-brain-stimulation-of-the-subcallosal-cingulate-for-treatment-refractory-anorexia-nervosa-1-year-follow-up-of-an-open-label-trial
#11
Nir Lipsman, Eileen Lam, Matthew Volpini, Kalam Sutandar, Richelle Twose, Peter Giacobbe, Devin J Sodums, Gwenn S Smith, D Blake Woodside, Andres M Lozano
BACKGROUND: Anorexia nervosa is a life-threatening illness. Brain circuits believed to drive anorexia nervosa symptoms can be accessed with surgical techniques such as deep brain stimulation (DBS). Initial results suggest that DBS of the subcallosal cingulate is safe and associated with improvements in mood and anxiety. Here, we investigated the safety, clinical, and neuroimaging outcomes of DBS of the subcallosal cingulate in a group of patients during 12 months of active stimulation...
February 23, 2017: Lancet Psychiatry
https://www.readbyqxmd.com/read/28238656/moonwalker-descending-neurons-mediate-visually-evoked-retreat-in-drosophila
#12
Rajyashree Sen, Ming Wu, Kristin Branson, Alice Robie, Gerald M Rubin, Barry J Dickson
Insects, like most animals, tend to steer away from imminent threats [1-7]. Drosophila melanogaster, for example, generally initiate an escape take-off in response to a looming visual stimulus, mimicking a potential predator [8]. The escape response to a visual threat is, however, flexible [9-12] and can alternatively consist of walking backward away from the perceived threat [11], which may be a more effective response to ambush predators such as nymphal praying mantids [7]. Flexibility in escape behavior may also add an element of unpredictability that makes it difficult for predators to anticipate or learn the prey's likely response [3-6]...
February 15, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28238548/context-and-output-layer-dependent-long-term-ensemble-plasticity-in-a-sensory-circuit
#13
Yoshiyuki Yamada, Khaleel Bhaukaurally, Tamás J Madarász, Alexandre Pouget, Ivan Rodriguez, Alan Carleton
Sensory information is translated into ensemble representations by various populations of projection neurons in brain circuits. The dynamics of ensemble representations formed by distinct channels of output neurons in diverse behavioral contexts remains largely unknown. We studied the two output neuron layers in the olfactory bulb (OB), mitral and tufted cells, using chronic two-photon calcium imaging in awake mice. Both output populations displayed similar odor response profiles. During passive sensory experience, both populations showed reorganization of ensemble odor representations yet stable pattern separation across days...
February 18, 2017: Neuron
https://www.readbyqxmd.com/read/28238546/regulation-of-thalamic-and-cortical-network-synchrony-by-scn8a
#14
Christopher D Makinson, Brian S Tanaka, Jordan M Sorokin, Jennifer C Wong, Catherine A Christian, Alan L Goldin, Andrew Escayg, John R Huguenard
Voltage-gated sodium channel (VGSC) mutations cause severe epilepsies marked by intermittent, pathological hypersynchronous brain states. Here we present two mechanisms that help to explain how mutations in one VGSC gene, Scn8a, contribute to two distinct seizure phenotypes: (1) hypoexcitation of cortical circuits leading to convulsive seizure resistance, and (2) hyperexcitation of thalamocortical circuits leading to non-convulsive absence epilepsy. We found that loss of Scn8a leads to altered RT cell intrinsic excitability and a failure in recurrent RT synaptic inhibition...
February 18, 2017: Neuron
https://www.readbyqxmd.com/read/28238201/advances-in-optogenetic-and-chemogenetic-methods-to-study-brain-circuits-in-non-human-primates
#15
REVIEW
Adriana Galvan, Michael J Caiola, Daniel L Albaugh
Over the last 10 years, the use of opto- and chemogenetics to modulate neuronal activity in research applications has increased exponentially. Both techniques involve the genetic delivery of artificial proteins (opsins or engineered receptors) that are expressed on a selective population of neurons. The firing of these neurons can then be manipulated using light sources (for opsins) or by systemic administration of exogenous compounds (for chemogenetic receptors). Opto- and chemogenetic tools have enabled many important advances in basal ganglia research in rodent models, yet these techniques have faced a slow progress in non-human primate (NHP) research...
February 25, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28238117/membrane-permeabilization-of-pathogenic-yeast-in-alternating-sub-microsecond-electromagnetic-fields-in-combination-with-conventional-electroporation
#16
Vitalij Novickij, Eglė Lastauskienė, Jurgita Švedienė, Audrius Grainys, Gediminas Staigvila, Algimantas Paškevičius, Irutė Girkontaitė, Auksė Zinkevičienė, Svetlana Markovskaja, Jurij Novickij
Recently, a novel contactless treatment method based on high-power pulsed electromagnetic fields (PEMF) was proposed, which results in cell membrane permeabilization effects similar to electroporation. In this work, a new PEMF generator based on multi-stage Marx circuit topology, which is capable of delivering 3.3 T, 0.19 kV/cm sub-microsecond pulses was used to permeabilize pathogenic yeast Candida albicans separately and in combination with conventional square wave electroporation (8-17 kV/cm, 100 μs)...
February 25, 2017: Journal of Membrane Biology
https://www.readbyqxmd.com/read/28238062/novel-microbial-photobioelectrochemical-cell-using-an-invasive-ultramicroelectrode-array-and-a-microfluidic-chamber
#17
Joon-Geun Ha, Young Seok Song, Sunghwan Jung, Soohwan Jang, Yong-Kweon Kim, Seoung Jai Bai, Jae-Hyoung Park, Seung-Ki Lee
OBJECTIVE: To fabricate a novel microbial photobioelectrochemical cell using silicon microfabrication techniques. RESULTS: High-density photosynthetic cells were immobilized in a microfluidic chamber, and ultra-microelectrodes in a microtip array were inserted into the cytosolic space of the cells to directly harvest photosynthetic electrons. In this way, the microbial photobioelectrochemical cell operated without the aid of electron mediators. Both short circuit current and open circuit voltage of the microbial photobioelectrochemical cell responded to light stimuli, and recorded as high as 250 pA and 45 mV, respectively...
February 25, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28237912/vestibular-stimulation-improves-insight-into-illness-in-schizophrenia-spectrum-disorders
#18
Philip Gerretsen, David D Pothier, Carolyn Falls, Maxine Armstrong, Thushanthi Balakumar, Hiroyuki Uchida, David C Mamo, Bruce G Pollock, Ariel Graff-Guerrero
Impaired insight into illness (IMP-INS) is common among individuals with schizophrenia spectrum disorders (SSD), contributing to medication nonadherence and poor clinical outcomes. Caloric vestibular simulation (CVS) is typically used to assess peripheral vestibular system function. Left cold CVS is also a transiently effective treatment for IMP-INS and hemineglect secondary to right brain hemisphere stroke, and possibly for IMP-INS and mood stabilization in patients with SSD. Participants with SSD and moderate-to-severe IMP-INS participated in an exploratory double blind, crossover, randomized controlled study of the effects of CVS on IMP-INS...
February 13, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28237895/anticoagulation-practices-and-the-prevalence-of-major-bleeding-thromboembolic-events-and-mortality-in-venoarterial-extracorporeal-membrane-oxygenation-a-systematic-review-and-meta-analysis
#19
Eric Sy, Michael C Sklar, Laurence Lequier, Eddy Fan, Hussein D Kanji
PURPOSE: The purpose was to evaluate the safety of anticoagulation in venoarterial extracorporeal membrane oxygenation (VA-ECMO). DESIGN: We performed a systematic review and meta-analysis using multiple electronic databases. Studies were from 1977 to September 27, 2016. We evaluated the effect of anticoagulation in VA-ECMO on outcomes including major bleeding, thromboembolic events, and in-hospital mortality using a random effects model meta-analysis. RESULTS: Twenty-six studies (1496 patients) were included...
February 12, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28237296/frontal-subcortical-circuitry-in-social-attachment-and-relationships-a-cross-sectional-fmri-ale-meta-analysis
#20
Shu-Hui Lee, Zachary M Walker, James B Hale, S H Annabel Chen
Researchers have explored the concept of attachment in multiple ways, from animal studies examining imprinting to abnormal attachment in psychopathology. However, until recently, few have considered how neural circuitry develops the effective social bonds that are subsequently replicated in relationships across the lifespan. This current cross-sectional study undertook a fMRI Activation Likelihood Estimation (ALE) meta-analyses to examine the neurocircuitry that governs emotional and behavioural functions critical for building effective social relationships in children and adults...
February 22, 2017: Behavioural Brain Research
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