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V N Peters, T U Tumkur, Jing Ma, Nicholas A Kotov, M A Noginov
We have studied strong exciton-plasmon coupling in the films of Ag nanoislands as well as in the layer-by-layer (LBL) deposited films of Au nanoparticles (NPs) coated with highly concentrated rhodamine 6G (R6G) dye. Their absorbance and the reflectance spectra featured the peaks or dips, which were not characteristic of dye or NPs/nanoislands taken separately. The positions of the spectral maxima (or minima) in the dye-doped films, plotted against those in pristine Ag nanoislands films, resulted in the dispersion curves comprised of three branches...
October 31, 2016: Optics Express
Roman Kotov, Dan Foti, Kaiqiao Li, Evelyn J Bromet, Greg Hajcak, Camilo J Ruggero
Heterogeneity of psychosis presents significant challenges for classification. Between 2 and 12 symptom dimensions have been proposed, and consensus is lacking. The present study sought to identify uniquely informative models by comparing the validity of these alternatives. An epidemiologic cohort of 628 first-admission inpatients with psychosis was interviewed 6 times over 2 decades and completed an electrophysiological assessment of error processing at year 20. We first analyzed a comprehensive set of 49 symptoms rated by interviewers at baseline, progressively extracting from 1 to 12 factors...
November 2016: Journal of Abnormal Psychology
Molly A Gromatsky, Monika A Waszczuk, Greg Perlman, Katie Lee Salis, Daniel N Klein, Roman Kotov
Adolescent non-suicidal self-injury (NSSI), a significant risk factor for suicidal behavior, is strongly associated with adolescent psychopathology and personality traits, particularly those characterized by poor self-regulation. Some parental psychopathology and personality traits have also been identified as risk factors for adolescent NSSI, but specific parental characteristics and mechanisms involved in this association have not been systematically examined. The current study comprehensively investigated the contribution of parental psychopathology and personality to adolescent NSSI using data from the baseline wave of the Adolescent Development of Emotion and Personality Traits (ADEPT) study of 550 adolescent girls (mean age = 14...
October 19, 2016: Journal of Psychiatric Research
Robert K Strother, Derek B Danahy, Dmitri I Kotov, Tamara A Kucaba, Zeb R Zacharias, Thomas S Griffith, Kevin L Legge, Vladimir P Badovinac
Patients surviving acute stages of sepsis often display impaired adaptive-immune responses. Using the cecal ligation and puncture model, we demonstrated that sepsis leads to substantial and long-lasting changes in the naive CD8 T cell repertoire, affecting the capacity of the host to respond to new infections. However, the identity of CD8 T cell-extrinsic factor(s) and mechanism(s) that contribute to impaired CD8 T cell responses after sepsis is unknown. Priming of naive CD8 T cells is critically dependent on the ability of dendritic cells (DCs) to provide Ag, costimulation, and inflammatory signal 3 cytokines; therefore, the sepsis-induced changes in the DC compartment might represent a contributing factor leading to diminished CD8 T cell immunity in septic hosts...
December 1, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
Brandon L Goldstein, Greg Perlman, Roman Kotov, Joan E Broderick, Keke Liu, Camilo Ruggero, Daniel N Klein
BACKGROUND: Many previous studies have indicated that individuals who are depressed or at risk for depression are characterized by increased levels of morning cortisol and a greater cortisol awakening response (CAR). However, despite the high comorbidity between depressive and anxiety disorders, fewer studies have examined whether these diurnal cortisol abnormalities are also characteristic of anxiety or risk for anxiety. METHODS: In the present study we examined cortisol in a community sample of 476 female adolescents and related it to maternal history of depression and/or anxiety disorders...
October 11, 2016: Journal of Affective Disorders
K V Firsov, A S Kotov
Fabry disease (Anderson-Fabry disease) is an X-linked recessive lysosomal storage disorder resulting from deficient activity of lysosomal hydrolase, alpha-galactosidase A (alpha-Gal A), which leads to progressive accumulation of globotriaosylceramide (Gb3) in various cells, predominantly endothelial and vascular smooth muscle cells, with clinical manifestations affecting major organs including the central nervous system. Manifestations of Fabry disease include progressive renal and cardiac insufficiency, neuropathic pain, stroke and cerebral disease, skin and gastrointestinal symptoms...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
Nicholas A Kotov
No abstract text is available yet for this article.
October 10, 2016: Nature Nanotechnology
Andrea Castelli, Alberto Striolo, Anna Roig, Catherine Murphy, Javier Reguera, Luis Liz-Marzán, Axel Mueller, Kevin Critchley, Yu Zhou, Mathias Brust, Antoine Thill, Leonardo Scarabelli, Luciano Tadiello, Tobias A F König, Beate Reiser, M Arturo López-Quintela, Martin Buzza, András Deák, Christian Kuttner, Estefania Gonzalez Solveyra, Lucia Pasquato, David Portehault, Hedi Mattoussi, Nicholas A Kotov, Eugenia Kumacheva, Kelley Heatley, Julian Bergueiro, Guillermo González, Wenming Tong, Muhammad Nawaz Tahir, Benjamin Abécassis, Oscar Rojas-Carrillo, Younan Xia, Martin Mayer, Davide Peddis
No abstract text is available yet for this article.
October 6, 2016: Faraday Discussions
Paras R Patel, Huanan Zhang, Matthew T Robbins, Justin B Nofar, Shaun P Marshall, Michael J Kobylarek, Takashi D Y Kozai, Nicholas A Kotov, Cynthia A Chestek
OBJECTIVE: Individual carbon fiber microelectrodes can record unit activity in both acute and semi-chronic (∼1 month) implants. Additionally, new methods have been developed to insert a 16 channel array of carbon fiber microelectrodes. Before assessing the in vivo long-term viability of these arrays, accelerated soak tests were carried out to determine the most stable site coating material. Next, a multi-animal, multi-month, chronic implantation study was carried out with carbon fiber microelectrode arrays and silicon electrodes...
December 2016: Journal of Neural Engineering
Sean A P Clouston, Roman Kotov, Robert H Pietrzak, Benjamin J Luft, Adam Gonzalez, Marcus Richards, Camilo J Ruggero, Avron Spiro, Evelyn J Bromet
INTRODUCTION: During the World Trade Center (WTC) attacks, responders who helped in search, rescue, and recovery endured multiple traumatic and toxic exposures. One-fifth subsequently developed post-traumatic stress disorder (PTSD). PTSD has been linked to dementia in veterans. This study examined the association between WTC-related PTSD and cognitive impairment (CI) in WTC responders. METHODS: A one-third sample of responders (N = 818) reporting for annual monitoring visits were screened for cognitive impairment and dementia using the Montreal Cognitive Assessment from January 2014-April 2015...
2016: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
Sarah R Horn, Robert H Pietrzak, Clyde Schechter, Evelyn J Bromet, Craig L Katz, Dori B Reissman, Roman Kotov, Michael Crane, Denise J Harrison, Robin Herbert, Benjamin J Luft, Jacqueline M Moline, Jeanne M Stellman, Iris G Udasin, Philip J Landrigan, Michael J Zvolensky, Steven M Southwick, Adriana Feder
Posttraumatic stress disorder (PTSD) is a debilitating and often chronic psychiatric disorder. Following the 9/11/2001 World Trade Center (WTC) attacks, thousands of individuals were involved in rescue, recovery and clean-up efforts. While a growing body of literature has documented the prevalence and correlates of PTSD in WTC responders, no study has evaluated predominant typologies of PTSD in this population. Participants were 4352 WTC responders with probable WTC-related DSM-IV PTSD. Latent class analyses were conducted to identify predominant typologies of PTSD symptoms and associated correlates...
September 2, 2016: Journal of Psychiatric Research
Michael Chmielewski, Camilo J Ruggero, Roman Kotov, Keke Liu, Robert F Krueger
Two competing models of personality psychopathology are included in the fifth edition of the Diagnostic Statistical Manual of Mental Disorders (DSM-5; American Psychiatric Association, 2013); the traditional personality disorder (PD) model included in Section II and an alternative trait-based model included in Section III. Numerous studies have examined the validity of the alternative trait model and its official assessment instrument, the Personality Inventory for DSM-5 (PID-5; Krueger, Derringer, Markon, Watson, & Skodol, 2012)...
September 12, 2016: Personality Disorders
Amri Sabharwal, Akos Szekely, Roman Kotov, Prerona Mukherjee, Hoi-Chung Leung, Deanna M Barch, Aprajita Mohanty
Deficits in working memory (WM) and emotion processing are prominent impairments in psychotic disorders, and have been linked to reduced quality of life and real-world functioning. Translation of knowledge regarding the neural circuitry implementing these deficits into improved diagnosis and targeted treatments has been slow, possibly because of categorical definitions of disorders. Using the dimensional Research Domain Criteria (RDoC) framework, we investigated the clinical and practical utility of transdiagnostic behavioral and neural measures of emotion-related WM disruption across psychotic disorders...
October 2016: Journal of Abnormal Psychology
Ekaterina V Popova, Adam Petrusek, Vladimír Kořínek, Joachim Mergeay, Eugeniya I Bekker, Dmitry P Karabanov, Yan R Galimov, Tatyana V Neretina, Derek J Taylor, Alexey A Kotov
Species of the genus Daphnia O.F. Müller, 1785 (Cladocera: Daphniidae) have become very important models in evolutionary biology research. Previous morphological and genetic evidence suggests that numerous closely related "species groups" exist within the subgenus Daphnia (Ctenodaphnia) Dybowski & Grochowski, 1895, containing both described and undescribed species. The Daphnia similis group is among these species groups. The aim of the present paper is to revise the taxonomy of the Daphnia (Ctenodaphnia) similis group in the Old World with both morphological and genetic evidence (based on mitochondrial COI and 12S rRNA genes)...
2016: Zootaxa
Taisuke Kojima, Kenji Hirai, Yunlong Zhou, Priyan Weerappuli, Shuichi Takayama, Nicholas A Kotov
The self-assembly of nanoparticles (NPs) is essential for emerging dispersion-based energy-conscious technologies. Of particular interest are micro- and macro-scale self-organizing superstructures that can bridge 2D/3D processing scales. Here we report the spontaneous assembly of CdTe NPs within an aqueous microdroplet suspended in soybean oil. The gradual diffusion of the water into the surrounding medium results in shrinking of the microdroplet, and a concomitant formation of branched assemblies from CdTe NPs that evolve in size from ∼50 μm to ∼1000 μm...
October 13, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
Eugeniya I Bekker, Dmitry P Karabanov, Yan R Galimov, Alexey A Kotov
Species of the genus Moina Baird (Cladocera: Moinidae) often dominate freshwater crustacean communities in temporary water bodies. Several species of Moina are used as food for fish larvae in aquaculture, as bioindicators in toxicological studies, and as common subjects for physiological studies. The aim of this paper is to estimate biodiversity of Moina in northern Eurasia using the standard DNA barcoding approach based on the cytochrome c oxidase subunit I (COI) gene. We analysed 160 newly obtained and 157 existing COI sequences, and found evidence for 21 phylogroups of Moina, some of which were detected here for the first time...
2016: PloS One
Xu Dou, Valeri N Kotov, Bruno Uchoa
Quantum spin-orbital liquids are elusive strongly correlated states of matter that emerge from quantum frustration between spin and orbital degrees of freedom. A promising route towards the observation of those states is the creation of artificial Mott insulators where antiferromagnetic correlations between spins and orbitals can be designed. We show that Coulomb impurity lattices on the surface of gapped honeycomb substrates, such as graphene on SiC, can be used to simulate SU(4) symmetric spin-orbital lattice models...
2016: Scientific Reports
Yuri N Shvachko, Denis V Starichenko, Aleksander V Korolyov, Eduard B Yagubskii, Alexander I Kotov, Lev I Buravov, Konstantin A Lyssenko, Vladimir N Zverev, Sergey V Simonov, Leokadiya V Zorina, Olga G Shakirova, Lyudmila G Lavrenova
The radical anion salt [Fe{HC(pz)3}2](TCNQ)3 demonstrates conductivity and spin-crossover (SCO) transition associated with Fe(II) complex cation subsystem. It was synthesized and structurally characterized at temperatures 100, 300, 400, and 450 K. The compound demonstrates unusual for 7,7,8,8,-tetracyanoquinodimethane (TCNQ)-based salts quasi-two-dimensional conductivity. Pronounced changes of the in-plane direct-current resistivity and intensity of the electron paramagnetic resonance (EPR) signal, originated from TCNQ subsystem, precede the SCO transition at the midpoint T* = 445 K...
September 6, 2016: Inorganic Chemistry
B F Jeronimus, R Kotov, H Riese, J Ormel
BACKGROUND: This meta-analysis seeks to quantify the prospective association between neuroticism and the common mental disorders (CMDs, including anxiety, depression, and substance abuse) as well as thought disorders (psychosis/schizophrenia) and non-specific mental distress. Data on the degree of confounding of the prospective association of neuroticism by baseline symptoms and psychiatric history, and the rate of decay of neuroticism's effect over time, can inform theories about the structure of psychopathology and role of neuroticism, in particular the vulnerability theory...
October 2016: Psychological Medicine
Eugeniya I Bekker, Alexey A Kotov
Our study is aimed at a taxonomic revision of the subgenus Eurycercus (Teretifrons) Frey, 1975 (Crustacea: Cladocera: Eurycercidae) in the Holarctic based on the morphology of parthenogenetic females. Three species were revealed and described: (1) E. glacialis Lilljeborg, 1887 which is relatively widely distributed in the north portion of Atlantic and Pacific regions; (2) E. nigracanthus Hann, 1990 which is apparently present in Labrador and Newfoundland, Cape Breton Island and Nova Scotia and (3) Eurycercus chernovi sp...
2016: Zootaxa
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