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https://www.readbyqxmd.com/read/29775648/towards-a-quantitative-model-to-predict-the-toxicity-pathogenicity-potential-of-mineral-fibers
#1
Alessandro F Gualtieri
A number of mineral fibers represent a health hazard because they are classified as cancer-causing chemical/physical toxicants upon (chronic) dust inhalation. Although in the last decades they have been the subject of intensive multidisciplinary investigations, the mechanisms by which mineral fibers induce toxic and pathogenic adverse effects on human health and environment are not yet fully understood. The major intricacy of the biological approach that prevents the design of a conclusive shared model of behavior of mineral fibers in a biological system stems from their very nature with intrinsic variability in chemical, molecular, structural and morphometric parameters, biodurability and surface reactivity...
May 15, 2018: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29775336/angular-momentum-of-a-bose-einstein-condensate-in-a-synthetic-rotational-field
#2
Chunlei Qu, Sandro Stringari
By applying a position-dependent detuning to a spin-orbit-coupled Hamiltonian with equal Rashba and Dresselhaus coupling, we exploit the behavior of the angular momentum of a harmonically trapped Bose-Einstein condensed atomic gas and discuss the distinctive role of its canonical and spin components. By developing the formalism of spinor hydrodynamics, we predict the precession of the dipole oscillation caused by the synthetic rotational field, in analogy with the precession of the Foucault pendulum, the excitation of the scissors mode, following the sudden switching off of the detuning, and the occurrence of Hall-like effects...
May 4, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29774545/prevalence-of-resurgence-of-destructive-behavior-when-thinning-reinforcement-schedules-during-functional-communication-training
#3
Adam M Briggs, Wayne W Fisher, Brian D Greer, Ryan T Kimball
Functional communication training is a well-established treatment for socially reinforced destructive behavior that typically includes differential reinforcement of the functional communication response (FCR) in combination with extinction of destructive behavior. However, when the schedule of reinforcement for the FCR is thinned, destructive behavior may resurge (e.g., Greer, Fisher, Saini, Owen, & Jones, 2016). Currently, data are unavailable on the prevalence and characteristics of resurgence during reinforcement schedule thinning...
May 17, 2018: Journal of Applied Behavior Analysis
https://www.readbyqxmd.com/read/29773818/predicting-transmission-blocking-potential-of-anti-malarial-compounds-in-the-mosquito-feeding-assay-using-plasmodium-falciparum-male-gamete-inhibition-assay
#4
Gonzalo Colmenarejo, Sonia Lozano, Carolina González-Cortés, David Calvo, Juliana Sanchez-Garcia, Jesús-Luís Presa Matilla, Didier Leroy, Janneth Rodrigues
Plasmodium falciparum Standard Membrane Feeding Assay (PfSMFA) is the current gold standard mosquito based confirmatory transmission blocking (TrB) assay for human malaria. However, owing to its complexity only selected gametocytocidal molecules are progressed into SMFA. Predictive tools for evaluation of TrB behavior of compounds in SMFA would be extremely beneficial, but lack of substantially large data sets from many mosquito feeds preempts the ability to perform correlations between outcomes from in vitro assays and SMFA...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29773777/seeking-biomarkers-of-early-childhood-malnutrition-s-long-term-effects
#5
Pedro A Valdés-Sosa, Janina R Galler, Cyralene P Bryce, Arielle G Rabinowitz, María L Bringas-Vega, Nibaldo Hernández-Mesa, Alberto Taboada-Crispi
Protein-energy malnutrition affects one in nine people worldwide and is most prevalent among children aged less than five years in low-income countries. Early childhood malnutrition can have damaging neurodevelopmental effects, with significant increases in cognitive, neurological and mental health problems over the lifespan, outcomes which can also extend to the next generation. This article describes a research collaboration involving scientists from five centers in Barbados, China, Cuba and the USA. It builds on longer-term joint work between the Barbados Nutrition Study (which, over a 45-year span, has extensively documented nutritional, health, behavioral, social and economic outcomes of individuals who experienced protein-energy malnutrition in the first year of life and healthy controls from the same classrooms and neighborhoods) and the Cuban Neuroscience Center (which has developed low-cost brain imaging methods that can be readily used in low income settings to identify biomarkers for early detection and treatment of adverse consequences of childhood malnutrition)...
April 2018: MEDICC Review
https://www.readbyqxmd.com/read/29772378/a-task-invariant-cognitive-reserve-network
#6
Yaakov Stern, Yunglin Gazes, Qolomreza Razlighi, Jason Steffener, Christian Habeck
The concept of cognitive reserve (CR) can explain individual differences in susceptibility to cognitive or functional impairment in the presence of age or disease-related brain changes. Epidemiologic evidence indicates that CR helps maintain performance in the face of pathology across multiple cognitive domains. We therefore tried to identify a single, "task-invariant" CR network that is active during the performance of many disparate tasks. In imaging data acquired from 255 individuals age 20-80 while performing 12 different cognitive tasks, we used an iterative approach to derive a multivariate network that was expressed during the performance of all tasks, and whose degree of expression correlated with IQ, a proxy for CR...
May 14, 2018: NeuroImage
https://www.readbyqxmd.com/read/29772244/gender-difference-in-the-effect-of-progesterone-on-neonatal-hypoxic-ischemic-brain-injury-in-mouse
#7
Shuyu Dong, Qian Zhang, Delian Kong, Chao Zhou, Jie Zhou, Jingjing Han, Yan Zhou, Guoliang Jin, Xiaodong Hua, Jun Wang, Fang Hua
This study was to investigate the effects of progesterone (PROG) on neonatal hypoxic/ischemic (NHI) brain injury, the differences in effects between genders, and the underlying mechanisms. NHI brain injury was established in both male and female neonatal mice induced by occlusion of the left common carotid artery followed by hypoxia. The mice were treated with PROG or vehicle. Fluoro-Jade B staining (F-JB), long term behavior testing, and brain magnetic resonance image (MRI) were applied to evaluate neuronal death, neurological function, and brain damage...
May 14, 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29772079/detection-of-multiple-perturbations-in-multi-omics-biological-networks
#8
Paula J Griffin, Yuqing Zhang, William Evan Johnson, Eric D Kolaczyk
Cellular mechanism-of-action is of fundamental concern in many biological studies. It is of particular interest for identifying the cause of disease and learning the way in which treatments act against disease. However, pinpointing such mechanisms is difficult, due to the fact that small perturbations to the cell can have wide-ranging downstream effects. Given a snapshot of cellular activity, it can be challenging to tell where a disturbance originated. The presence of an ever-greater variety of high-throughput biological data offers an opportunity to examine cellular behavior from multiple angles, but also presents the statistical challenge of how to effectively analyze data from multiple sources...
May 17, 2018: Biometrics
https://www.readbyqxmd.com/read/29772020/so-many-genes-so-little-time-a-practical-approach-to-divergence-time-estimation-in-the-genomic-era
#9
Stephen A Smith, Joseph W Brown, Joseph F Walker
Phylogenomic datasets have been successfully used to address questions involving evolutionary relationships, patterns of genome structure, signatures of selection, and gene and genome duplications. However, despite the recent explosion in genomic and transcriptomic data, the utility of these data sources for efficient divergence-time inference remains unexamined. Phylogenomic datasets pose two distinct problems for divergence-time estimation: (i) the volume of data makes inference of the entire dataset intractable, and (ii) the extent of underlying topological and rate heterogeneity across genes makes model mis-specification a real concern...
2018: PloS One
https://www.readbyqxmd.com/read/29771555/the-quality-of-assessments-for-childhood-psychopathology-within-a-regional-medical-center
#10
Adam F Sattler, Jarrod M Leffler, Nicole L Harrison, Ewa D Bieber, Joseph J Kosmach, Leslie A Sim, Stephen P H Whiteside
Accurate assessment is essential to implementing effective mental health treatment; however, little research has explored child clinicians' assessment practices in applied settings. The current study thus examines practitioners' use of evidence-based assessment (EBA) instruments (i.e., self-report measures and structured interviews), specificity of identified diagnoses (i.e., use of specific diagnostic labels vs. nonstandardized labels, not otherwise specified [NOS] diagnoses, and adjustment disorder diagnoses), and documentation of Diagnostic and Statistical Manual of Mental Disorders (4th ed...
May 17, 2018: Psychological Services
https://www.readbyqxmd.com/read/29771217/cognitive-behavioral-therapy-mindfulness-and-hypnosis-as-treatment-methods-for-generalized-anxiety-disorder
#11
Carolyn Daitch
Individuals suffering from generalized anxiety disorder (GAD) experience a broad range of physical, emotional, and cognitive distress. A hallmark of GAD is anxiety around making decisions. Many clinicians notice improvements in patients through specific modalities, such as mindfulness, hypnosis, and cognitive behavioral therapy (CBT); however, these individual methods sometimes fall short. Clinicians and researchers alike note that it can be more effective to combine these three methods into an integrative treatment protocol...
July 2018: American Journal of Clinical Hypnosis
https://www.readbyqxmd.com/read/29771150/assessment-of-multiple-membership-multilevel-models-an-application-to-interviewer-effects-on-nonresponse
#12
Gabriele B Durrant, Rebecca Vassallo, Peter W F Smith
Multilevel multiple membership models account for situations where lower level units are nested within multiple higher level units from the same classification. Not accounting correctly for such multiple membership structures leads to biased results. The use of a multiple membership model requires selection of weights reflecting the hypothesized contribution of each level two unit and their relationship to the level one outcome. The Deviance Information Criterion (DIC) has been proposed to identify such weights...
May 17, 2018: Multivariate Behavioral Research
https://www.readbyqxmd.com/read/29770659/-investigation-on-unhealthy-related-behaviors-of-echinococcosis-patients-in-garz%C3%A3%C2%AA-prefecture-sichuan-province
#13
Tian Ke-Qing, Tian Tian, Shi Guo-Qing, Cao Chun-Li, Hao Yu-Wan, Zhu Ze-Lin, Zhou Xiao-Nong
OBJECTIVE: To understand the unhealthy related behaviors of echinococcosis patients in Tibetan region in Sichuan Province, so as to provide the references for the health education of echinococcosis. METHODS: The echinococcosis patients who were registered in the Tibetan region in Sichuan Province were selected as target population. The basic situation and unhealthy related behaviors of them were surveyed by individual interviews. RESULTS: Totally 368 echinococcosis patients were investigated...
April 17, 2018: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
https://www.readbyqxmd.com/read/29770433/behavioral-contrast-research-and-areas-for-investigation
#14
Megan A Boyle, Audrey N Hoffmann, Joseph M Lambert
Behavioral contrast occurs when a change in reinforcement rate in one context results in a change in behavior in the opposite direction in an unchanged context. Despite decades of study by basic researchers, behavioral contrast has remained largely an unstudied phenomenon among applied researchers. The purpose of this paper is to occasion translational and applied research on behavioral contrast with the aim of predicting and controlling socially significant behavior in unchanged contexts. We present a brief history of contrast and related definitions, review research with human and nonhuman subjects, and suggest future directions for applied and translational researchers...
May 16, 2018: Journal of Applied Behavior Analysis
https://www.readbyqxmd.com/read/29770146/effects-of-20-hz-repetitive-transcranial-magnetic-stimulation-on-disorders-of-consciousness-a-resting-state-electroencephalography-study
#15
Fangping He, Min Wu, Fanxia Meng, Yangfan Hu, Jian Gao, Zhongqin Chen, Wangxiao Bao, Kehong Liu, Benyan Luo, Gang Pan
Repetitive transcranial magnetic stimulation (rTMS) has been proposed as an experimental approach for the treatment of disorders of consciousness (DOC). To date, there has been little research into the use of rTMS in DOC and the therapeutic effects have been variously documented. This study aimed to examine the effects of 20 Hz rTMS on the electroencephalography (EEG) reactivity and clinical response in patients with DOC and to explore the neuromodulatory effects of high-frequency rTMS. In this randomized, sham-controlled, crossover study, real or sham 20 Hz rTMS was applied to the left primary motor cortex (M1) of patients with DOC for 5 consecutive days...
2018: Neural Plasticity
https://www.readbyqxmd.com/read/29769536/discretization-of-the-total-magnetic-field-by-the-nuclear-spin-bath-in-fluorine-doped-znse
#16
E A Zhukov, E Kirstein, N E Kopteva, F Heisterkamp, I A Yugova, V L Korenev, D R Yakovlev, A Pawlis, M Bayer, A Greilich
The coherent spin dynamics of fluorine donor-bound electrons in ZnSe induced by pulsed optical excitation is studied in a perpendicular applied magnetic field. The Larmor precession frequency serves as a measure for the total magnetic field exerted onto the electron spins and, surprisingly, does not increase linearly with the applied field, but shows a step-like behavior with pronounced plateaus, given by multiples of the laser repetition rate. This discretization occurs by a feedback mechanism in which the electron spins polarize the nuclear spins, which in turn generate a local Overhauser field adjusting the total magnetic field accordingly...
May 16, 2018: Nature Communications
https://www.readbyqxmd.com/read/29769399/dissecting-and-culturing-animal-cap-explants
#17
Kevin S Dingwell, James C Smith
The animal cap explant is a simple but adaptable tool available to developmental biologists. The use of animal cap explants in demonstrating the presence of mesoderm-inducting activity in the Xenopus embryo vegetal pole is one of many elegant examples of their worth. Animal caps respond to a range of growth factors (e.g., Wnts, FGF, TGF-β), making them especially useful for studying signal transduction pathways and gene regulatory networks. Explants are also suitable for examining cell behavior and have provided key insights into the molecular mechanisms controlling vertebrate morphogenesis...
May 16, 2018: Cold Spring Harbor Protocols
https://www.readbyqxmd.com/read/29769096/a-methodology-for-generating-a-tailored-implementation-blueprint-an-exemplar-from-a-youth-residential-setting
#18
Cara C Lewis, Kelli Scott, Brigid R Marriott
BACKGROUND: Tailored implementation approaches are touted as more likely to support the integration of evidence-based practices. However, to our knowledge, few methodologies for tailoring implementations exist. This manuscript will apply a model-driven, mixed methods approach to a needs assessment to identify the determinants of practice, and pilot a modified conjoint analysis method to generate an implementation blueprint using a case example of a cognitive behavioral therapy (CBT) implementation in a youth residential center...
May 16, 2018: Implementation Science: IS
https://www.readbyqxmd.com/read/29769077/magnetic-field-distribution-modulation-of-intrathecal-delivered-ketorolac-iron-oxide-nanoparticle-conjugates-produce-excellent-analgesia-for-chronic-inflammatory-pain
#19
Ping-Ching Wu, Dar-Bin Shieh, Hung-Tsung Hsiao, Jeffery Chi-Fei Wang, Ya-Chi Lin, Yen-Chin Liu
BACKGROUND: Nanoparticles have become one of the most promising among the potential materials used for biomedical applications. However, few researchers have focused on their effects on analgesia. Despite the fact that various nanoparticles have been evaluated for drug delivery and MRI imaging contrast enhancement in clinical settings, no reports have investigated the in vivo synergy of ketorolac iron-oxide nanoparticle conjugates to improve the analgesic effect. METHODS: Ketorolac conjugated magnetic iron oxide nanoparticles (Keto-SPIO) were synthesized via two-stage additions of protective agents and chemical co-precipitation...
May 16, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29767589/efficient-nonparametric-confidence-bands-for-receiver-operating-characteristic-curves
#20
Pablo Martínez-Camblor, Sonia Pérez-Fernández, Norberto Corral
Receiver operating-characteristic curve is a popular graphical method frequently used in order to study the diagnostic capacity of continuous (bio)markers. In spite of the existence of a huge number of papers devoted to both theoretical and practical aspects of this topic, the construction of confidence bands has had little impact in the specialized literature. As far as the authors know, in the CRAN there are only three R packages providing receiver operating-characteristic curve confidence regions: plotROC, pROC and fbroc...
June 2018: Statistical Methods in Medical Research
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