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https://www.readbyqxmd.com/read/29792986/model-based-nir-spectroscopy-implementation-for-in-line-assay-monitoring-during-a-pharmaceutical-suspension-manufacturing-process
#1
Maxim Verstraeten, Daan Van Hauwermeiren, Mario Hellings, Eline Hermans, Jeroen Geens, Chris Vervaet, Ingmar Nopens, Thomas De Beer
The implementation of Process Analytical Technology (PAT) instruments is generally achieved stochastically. Sub-optimal PAT locations could introduce variation in the measurements which is not related to the analyte of interest. For this reason, rational approaches should be considered to establish an optimal sensor placement where relevant measurements are possible and the impact of disturbances is minimized. The aim of this paper is to demonstrate how mechanistic modelling can support appropriate sensor implementation by means of a case study...
May 21, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29792874/pet-staging-of-amyloidosis-using-striatum
#2
Bernard J Hanseeuw, Rebecca A Betensky, Elizabeth C Mormino, Aaron P Schultz, Jorge Sepulcre, John A Becker, Heidi I L Jacobs, Rachel F Buckley, Molly R LaPoint, Patrizia Vanini, Nancy J Donovan, Jasmeer P Chhatwal, Gad A Marshall, Kathryn V Papp, Rebecca E Amariglio, Dorene M Rentz, Reisa A Sperling, Keith A Johnson
INTRODUCTION: Amyloid PET data are commonly expressed as binary measures of cortical deposition. However, not all individuals with high cortical amyloid will experience rapid cognitive decline. Motivated by postmortem data, we evaluated a three-stage PET classification: low cortical; high cortical, low striatal; and high cortical, high striatal amyloid; hypothesizing this model could better reflect Alzheimer's dementia progression than a model based only on cortical measures. METHODS: We classified PET data from 1433 participants (646 normal, 574 mild cognitive impairment, and 213 AD), explored the successive involvement of cortex and striatum using 3-year follow-up PET data, and evaluated the associations between PET stages, hippocampal volumes, and cognition...
May 21, 2018: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/29792373/author-accepted-manuscript-systematic-spatial-patterns-of-the-sense-of-familiarity-hierarchical-modelling-based-on-eye-tracking-experiments
#3
Kiyofumi Miyoshi, Hiroshi Ashida
No abstract text is available yet for this article.
January 1, 2018: Quarterly Journal of Experimental Psychology: QJEP
https://www.readbyqxmd.com/read/29792368/electrophysiological-multimodal-assessments-improve-outcome-prediction-in-traumatic-cervical-spinal-cord-injury
#4
Markus Hupp, Chiara Pavese, Lucas Bachmann, Rene Koller, Martin Schubert
Outcome prediction after spinal cord injury (SCI) is essential for early counseling and orientation of the rehabilitative intervention. Moreover, prognostication of outcome is crucial to achieve meaningful stratification when conceiving clinical trials. Neurophysiological examinations are commonly employed for prognostication after SCI, but whether neurophysiology could improve the functional prognosis based on clinical predictors remains open. Data of 224 patients included in the European Multicenter Study about Spinal Cord Injury were analyzed with bootstrapping analysis and multivariate logistic regression to derive prediction models of complete functional recovery in chronic stage after traumatic cervical SCI...
May 24, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29792038/downregulation-of-cancer-stemness-by-novel-diterpenoid-ovatodiolide-inhibits-hepatic-cancer-stem-cell-like-traits-by-repressing-wnt-formula-see-text-catenin-signaling
#5
Mingche Liu, Oluwaseun Adebayo Bamodu, Kuang-Tai Kuo, Wei-Hwa Lee, Yen-Kuang Lin, Alexander T H Wu, Hsiao M, Yew-Min Tzeng, Chi-Tai Yeh, Jo-Ting Tsai
The hierarchical tumor propagation or cancer stem cells (CSCs) model of carcinogenesis postulates that like physiologic adult stem cell (ASC), the CSCs positioned at the apex of any tumor population form the crux of tumor evolution with a constitutive regenerative capacity and differentiation potential. The propagation and recurrence of the characteristically heterogeneous and therapy-resistant hepatocellular carcinoma (HCC), adds to accumulating evidence to support this CSCs model. Based on the multi-etiologic basis of HCC formation which among others, focuses on the disruption of the canonical Wnt signaling pathway, this study evaluated the role of cembrane-type phytochemical, Ovatodiolide, in the modulation of the Wnt/[Formula: see text]-catenin pathway, and its subsequent effect on liver CSCs' activities...
May 24, 2018: American Journal of Chinese Medicine
https://www.readbyqxmd.com/read/29791803/bacteria-activated-janus-particles-driven-by-chemotaxis
#6
Zihan Huang, Pengyu Chen, Guo-Long Zhu, Ye Yang, Ziyang Xu, Li-Tang Yan
In the development of biocompatible nano/micro-motors for drug and cargo delivery, motile bacteria represent an excellent energy source for biomedical applications. Despite intense research of the fabrication of bacteria-based motors, how to effectively utilize the instinctive responses of bacteria to environmental stimuli in the fabrication process, particularly, chemotaxis, remains an urgent and critical issue. Here, by developing a molecular-dynamics model of bacterial chemotaxis, we present an investigation of the transport of a bacteria-activated Janus particle driven by chemotaxis...
May 23, 2018: ACS Nano
https://www.readbyqxmd.com/read/29791463/recurrent-spatio-temporal-modeling-of-check-ins-in-location-based-social-networks
#7
Ali Zarezade, Sina Jafarzadeh, Hamid R Rabiee
Social networks are getting closer to our real physical world. People share the exact location and time of their check-ins and are influenced by their friends. Modeling the spatio-temporal behavior of users in social networks is of great importance for predicting the future behavior of users, controlling the users' movements, and finding the latent influence network. It is observed that users have periodic patterns in their movements. Also, they are influenced by the locations that their close friends recently visited...
2018: PloS One
https://www.readbyqxmd.com/read/29791354/improved-three-dimensional-reconstruction-algorithm-from-a-multifocus-microscopic-image-sequence-based-on-a-nonsubsampled-wavelet-transform
#8
Yingzhong Tian, Haoyang Cui, Zhiyan Pan, Jiaorong Liu, Shouchen Yang, Lilan Liu, Wenbin Wang, Long Li
In the multifocus microscopic image measurement method, the distortion of the three-dimensional (3D) reconstruction model has always been an important factor affecting the measurement result. In spatial domains, the focus measure algorithm is based on the gradient change of the pixel point to determine the degree of focus of the pixel. So it will be difficult to accurately extract the focus of the pixel in the areas where color difference is not obvious, resulting in 3D model distortion. According to the optical principle, the high-frequency coefficients of the clear image are larger than the high-frequency coefficients of the blurred image...
May 10, 2018: Applied Optics
https://www.readbyqxmd.com/read/29791199/localization-of-the-inferior-alveolar-canal-using-ultralow-dose-ct-with-iterative-reconstruction-techniques
#9
Asma'a Abdulrahman Al-Ekrish, Wafa Alfaleh, Romed Hörmann, Ameera Alabdulwahid, Wolfgang Puelacher, Gerlig Widmann
OBJECTIVES: To compare subjective and objective localization of the inferior alveolar canal (IAC) on multidetector computed tomography (MDCT) images obtained by ultralow doses in combination with the reconstruction techniques of filtered backprojection (FBP), Adaptive Statistical Iterative Reconstruction (ASIR), or Model Based Iterative Reconstruction (MBIR) as compared to standard dose MDCT and FBP. METHODS: Three cadavers were imaged with a reference standard dose MDCT examination (CTDIvol: 29...
May 23, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29791163/on-the-relationship-between-excited-state-lifetime-and-isomerization-quantum-yield-in-animal-rhodopsins-beyond-the-one-dimensional-landau-zener-model
#10
Mohsen M T El-Tahawy, Artur Nenov, Oliver Weingart, Massimo Olivucci, Marco Garavelli
We show that the speed of the chromophore photoisomerization of animal rhodopsins is not a relevant control knob for their light sensitivity. This result is at odd with the momentum-driven tunnelling rationale (i.e., assuming a one-dimensional Landau-Zener model for the decay: Zener, C. "Non-Adiabatic Crossing of Energy Levels", Proceedings of the Royal Society of London. Series A 1932, 137 (833), 696-702) holding that a faster nuclear motion through the conical intersection translates into a higher quantum yield and, thus, light sensitivity...
May 23, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29790906/bcseq-an-r-package-for-fast-sequence-mapping-in-high-throughput-shrna-and-crispr-screens
#11
Jiaxing Lin, Jeremy Gresham, Tongrong Wang, So Young Kim, James Alvarez, Jeffrey S Damrauer, Scott Floyd, Joshua Granek, Andrew Allen, Cliburn Chan, Jichun Xie, Kouros Owzar
Summary: CRISPR-Cas9 and shRNA high-throughput sequencing screens have abundant applications for basic and translational research. Methods and tools for the analysis of these screens must properly account for sequencing error, resolve ambiguous mappings among similar sequences in the barcode library in a statistically principled manner, and be computationally efficient. Herein we present bcSeq, an open source R package that implements a fast and parallelized algorithm for mapping high-throughput sequencing reads to a barcode library while tolerating sequencing error...
May 22, 2018: Bioinformatics
https://www.readbyqxmd.com/read/29790691/the-protective-effect-of-gingko-biloba-in-a-rat-model-of-ovarian-ischemia-reperfusion-injury-improvement-in-histological-and-biochemical-parameters
#12
Nuri Yildirim, Deniz Simsek, Semir Kose, Alkim Gulsah Sahingoz Yildirim, Cagri Guven, Gurkan Yigitturk, Oytun Erbas
BACKGROUND: Ovarian torsion is one of the most common gynecological emergencies, which especially affects women of reproductive age. OBJECTIVES: We aimed to evaluate the effect of Ginkgo biloba (GB) supplementation in ovarian ischemia/ reperfusion injury in an experimental torsion/de-torsion rat model. MATERIAL AND METHODS: This study was carried out in the Ege University Faculty of Medicine in Izmir, Turkey. Thirty mature female Sprague-Dawley albino rats were randomly divided into 5 groups: in Group 1 (control), the abdominal wall was only opened and closed; in the torsion group (Group 2), ischemia was induced for 3 h, using atraumatic vascular clips to create a torsion model; in the torsion/GB group (Group 3), the rats were given 80 mg/kg (oral gavage) of GB 30 min before torsion was induced and the torsion model was formed; in the torsion/de-torsion group (Group 4), the rats underwent 3 h of ischemia and then the vascular clips were removed and reperfusion took place for 3 h; in the torsion/de-torsion/GB group (Group 5), the rats underwent 3 h of ischemia followed by GB (oral gavage) 30 min prior to a 3-h reperfusion period...
May 16, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29790020/can-we-accurately-predict-cost-effectiveness-without-access-to-overall-survival-data-the-case-study-of-nivolumab-in-combination-with-ipilimumab-for-the-treatment-of-patients-with-advanced-melanoma-in-england
#13
D Lee, A Amadi, J Sabater, J Ellis, H Johnson, S Kotapati, S McNamara, A Walker, M Cooper, K Patterson, N Roskell, Y Meng
BACKGROUND: Nivolumab with ipilimumab (the Regimen) is the first immuno-oncology combination treatment to demonstrate long-term clinical benefit for advanced melanoma patients. We evaluated the cost effectiveness of the Regimen in this population, with and without the availability of overall survival (OS) data. METHODS: A partitioned survival model and a Markov state-transition model were developed to estimate the lifetime costs and benefits of the Regimen versus ipilimumab...
May 22, 2018: PharmacoEconomics Open
https://www.readbyqxmd.com/read/29790009/a-new-model-of-the-spinal-locomotor-networks-of-a-salamander-and-its-properties
#14
Qiang Liu, Huizhen Yang, Jinxue Zhang, Jingzhuo Wang
A salamander is an ideal animal for studying the spinal locomotor network mechanism of vertebrates from an evolutionary perspective since it represents the transition from an aquatic to a terrestrial animal. However, little is known about the spinal locomotor network of a salamander. A spinal locomotor network model is a useful tool for exploring the working mechanism of the spinal networks of salamanders. A new spinal locomotor network model for a salamander is built for a three-dimensional (3D) biomechanical model of the salamander using a novel locomotion-controlled neural network model...
May 22, 2018: Biological Cybernetics
https://www.readbyqxmd.com/read/29789827/effect-of-the-monostearate-monopalmitate-ratio-on-the-oral-release-of-active-agents-from-monoacylglycerol-organogels
#15
F R Lupi, V Mancina, N Baldino, O I Parisi, L Scrivano, D Gabriele
The delivery of active agents from organogels is becoming an important topic owing to the possibility of releasing, in a controlled way, lipophilic agents. Controlled release from foods is a topic with increasing relevance owing to the growing industrial interest towards functional or medical foods, i.e. foods containing nutraceutical agents or drugs. Anyway, release properties are related to the rheological properties of organogels, and, therefore, a deep knowledge of their microstructure and physical characteristics is necessary to design carriers with expected release properties...
May 23, 2018: Food & Function
https://www.readbyqxmd.com/read/29789422/machine-learning-based-radiomics-for-molecular-subtyping-of-gliomas
#16
Chia-Feng Lu, Fei-Ting Hsu, Kevin Li-Chun Hsieh, Yu-Chieh Jill Kao, Sho-Jen Cheng, Justin Bo-Kai Hsu, Ping-Huei Tsai, Ray-Jade Chen, Chao-Ching Huang, Yun Yen, Cheng-Yu Chen
PURPOSE: The new classification announced by the World Health Organization in 2016 recognized five molecular subtypes of diffuse gliomas based on isocitrate dehydrogenase (IDH) and 1p/19q genotypes in addition to histological phenotypes. We aim to determine whether clinical magnetic resonance imaging (MRI) can stratify these molecular subtypes to benefit the diagnosis and monitoring of gliomas. EXPERIMENTAL DESIGN: The data from 456 subjects with gliomas were obtained from The Cancer Imaging Archive...
May 22, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29788968/spatio-temporal-mapping-of-madagascar-s-malaria-indicator-survey-results-to-assess-plasmodium-falciparum-endemicity-trends-between-2011-and-2016
#17
Su Yun Kang, Katherine E Battle, Harry S Gibson, Arsène Ratsimbasoa, Milijaona Randrianarivelojosia, Stéphanie Ramboarina, Peter A Zimmerman, Daniel J Weiss, Ewan Cameron, Peter W Gething, Rosalind E Howes
BACKGROUND: Reliable measures of disease burden over time are necessary to evaluate the impact of interventions and assess sub-national trends in the distribution of infection. Three Malaria Indicator Surveys (MISs) have been conducted in Madagascar since 2011. They provide a valuable resource to assess changes in burden that is complementary to the country's routine case reporting system. METHODS: A Bayesian geostatistical spatio-temporal model was developed in an integrated nested Laplace approximation framework to map the prevalence of Plasmodium falciparum malaria infection among children from 6 to 59 months in age across Madagascar for 2011, 2013 and 2016 based on the MIS datasets...
May 23, 2018: BMC Medicine
https://www.readbyqxmd.com/read/29788493/how-the-central-american-seaway-and-an-ancient-northern-passage-affected-flatfish-diversification
#18
Lisa Byrne, François Chapleau, Stéphane Aris-Brosou
While the natural history of flatfish has been debated for decades, the mode of diversification of this biologically and economically important group has never been elucidated. To address this question, we assembled the largest molecular data set to date, covering > 300 species (out of ca. 800 extant), from 13 of the 14 known families over nine genes, and employed relaxed molecular clocks to uncover their patterns of diversification. As the fossil record of flatfish is contentious, we used sister species distributed on both sides of the American continent to calibrate clock models based on the closure of the Central American Seaway (CAS), and on their current species range...
May 21, 2018: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/29787995/n-point-moving-average-a-special-generalized-transfer-function-method-for-estimation-of-central-aortic-blood-pressure
#19
Hanguang Xiao, Mark Butlin, Ahmad Qasem, Isabella Tan, Decai Li, Alberto P Avolio
OBJECTIVE: N-point moving average (NPMA) is a simplified method of central aortic systolic pressure (CASP) estimation in comparison with the generalized transfer function (GTF). The fundamental difference or similarity between the methods is not established. This study investigates theoretical properties of NPMA relative to GTF and explores the integer and fractional denominator for the averaging process in the NPMA. METHODS: Convolution of a specified square wave and the radial (or brachial) blood pressure waveform constituted the NPMA ...
June 2018: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/29787495/differentiating-neuromyelitis-optica-related-and-multiple-sclerosis-related-acute-optic-neuritis-using-conventional-magnetic-resonance-imaging-combined-with-readout-segmented-echo-planar-diffusion-weighted-imaging
#20
Ping Lu, Guohong Tian, Xilan Liu, Feng Wang, Zhongshuai Zhang, Yan Sha
PURPOSE: In clinical practice, acute optic neuritis (ON) associated with the development of neuromyelitis optica (NMO) after the first attack is often indistinguishable from that associated with multiple sclerosis (MS). We aimed to determine the optimal combination of features derived from conventional magnetic resonance imaging (MRI) and diffusion-weighted imaging using readout-segmented echo-planar imaging (RESOLVE-DWI) for the differentiation of these conditions. MATERIALS AND METHODS: Orbital conventional MRI and RESOLVE-DWI were performed using a 3...
May 21, 2018: Journal of Computer Assisted Tomography
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