PubMed Journals Articles About "DILIsym Services Simulations Plus Company Releases DILIsym Version" RSS

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Showing "DILIsym Services Simulations Plus Company Releases DILIsym Version" PubMed Articles 1–25 of 5,600+

Frequency-dependent regulation of intrinsic excitability by voltage-activated membrane conductances, computational modeling and dynamic clamp.

As one of the most unique properties of nerve cells, their intrinsic excitability allows them to transform synaptic inputs into action potentials. This process reflects a complex interplay between the synaptic inputs and the voltage-dependent membrane currents of the postsynaptic neuron. While neurons in natural conditions mostly fire under the action of intense synaptic bombardment and receive fluctuating patterns of excitation and inhibition, conventional techniques to characterize intrinsic excitability ...

Inter-Observer Agreement in Pediatric Cervical Spine Injury Assessment between Prehospital and Emergency Department Providers.

Investigators have derived cervical spine injury (CSI) decision support tools from physician observations. There is a need to demonstrate that prehospital emergency medical services (EMS) providers can use these tools to appropriately determine the need for spinal motion restrictions and make field disposition decisions.

A pedagogical framework for facilitating parents' learning in nurse-parent partnership.

Nursing work increasingly demands forms of expertise that complement specialist knowledge. In child and family nursing, this need arises when nurses work in partnership with parents of young children at risk. Partnership means working with parents in respectful, negotiated and empowering ways. Existing partnership literature emphasises communicative and relational skills, but this paper focuses on nurses' capacities to facilitate parents' learning. Referring to data from home visiting, day-stay and speciali...

Characterization of doubly ionic hydrogen bonds in protic ionic liquids by NMR deuteron quadrupole coupling constants - Differences to H-bonds in amides, peptides and proteins.

We present the first deuteron quadrupole coupling constants (DQCC) for selected protic ionic liquids (PILs) measured by solid-state NMR spectroscopy. The experimental data are supported by dispersion-corrected density functional theory (DFT-D3) calculations and molecular dynamics (MD) simulations. The DQCCs of the N-D bond in the triethylammonium cations are the lowest reported for deuterons in PILs indicating strong doubly ionic hydrogen bonds. The NMR coupling parameters are compared to those in amides, p...

Interconversion Rates Between Conformational States as Rationale for the Membrane Permeability of Cyclosporines.

Cyclic peptides have regained interest as potential inhibitors of challenging targets, but have often a low bioavailability. The natural product cyclosporine A (CsA) is the textbook exception. Despite its size and polar backbone it is able to passively cross membranes. This ability is hypothesized to be due to a conformational change from the low-energy conformation in water to a "congruent" conformation that is populated both in water and inside the membrane. Here, we use a combination of NMR measurements ...

Nano-Air Seeds Trapped in Mesoporous Janus Nanoparticles Facilitate Cavitation and Enhance Ultrasound Imaging.

The current contrast agents utilized in ultrasound (US) imaging are based on microbubbles which, however, suffer from a short lifetime in the systemic circulation. The present study introduces a new type of contrast agents for US imaging based on bioresorbable Janus nanoparticles (NPs) that are able to generate microbubbles in situ under US radiation for extended time. The Janus NPs were fabricated from porous silicon (PSi) that was modified via a nanostopper technique. The technique was exploited to prepar...

Quantifying Secondary Structure Changes in Calmodulin using 2D-IR Spectroscopy.

Revealing the details of biomolecular processes in solution needs tools that can monitor structural dynamics over a range of time and length scales. We assess the ability of 2D-IR spectroscopy in combination with multivariate data analysis to quantify changes in secondary structure of the multifunctional calcium-binding messenger protein Calmodulin (CaM) as a function of temperature and Ca2+ concentration. Our approach produced quantitative agreement with circular dichroism (CD) spectroscopy in detecting th...

The Hydrophobic Effect and the Role of Cosolvents.

Cosolvents modulate aqueous solubility, hydrophobic interactions, and the stability and function of most proteins in the living cell. Our molecular-level understanding of cosolvent effects is incomplete, not only at the level of complex systems such as proteins, but also at the level of very fundamental interactions that underlie the hydrophobic effect. This Feature Article discusses cosolvent effects on the aqueous solubility of nonpolar solutes, hydrophobic interactions, and hydrophobic self-assembly/coll...

Photoinduced Bimolecular Electron Transfer in Ionic Liquids.

The present work seeks to better understand the role of solute diffusion and solvation dynamics on bimolecular electron transfer in ionic liquids (ILs). Steady-state and time-resolved measurements of the reductive fluorescence quenching of five fluorophores ("F") by six quenchers ("Q"; electron donors) are reported in acetonitrile and two ionic liquids, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide and trihexyl(tetradecyl)phosphonium bis(trifluoromethylsulfonyl)amide. Data were collected on ...

Professional, generational, and gender differences in perception of organisational values among Israeli physicians and nurses: Implications for retention.

The global health workforce today is more age diverse than ever before and spans three generations: baby boomers, X and Y generations. Each generation has a distinct set of characteristics, values, and beliefs. This diversity can lead to increased creativity and a greater richness of values and skills, but at the same time it can also lead to value clashes, disrespect, and conflicts. This study aimed to examine professional, generational, and gender differences in the perception of the importance of organis...

Economic burden of pneumococcal infections in children under 5 years of age.

The present study aimed to determine the cost of childhood pneumococcal infections under 5 years of age and to provide further data for future health economy studies. Electronic medical records of children diagnosed with meningitis caused by S. pneumoniae and all-cause pneumonia, and acute otitis media (AOM) between January 2013-April 2014 were retrospectively evaluated. Direct costs for the treatments of hospitalized patients (pneumonia and pneumococcal meningitis) including costs of healthcare services c...

How Cancer Patients Use and Benefit from an Interactive Cancer Communication System.

Despite the mounting evidence of efficacy of eHealth interventions, their mechanisms of action remain unknown. The current study analyzed patient log data as each patient engaged in an eHealth system called the Comprehensive Health Enhancement Support System (CHESS) and reports on how patients engage with different combinations of eHealth services over time. Newly diagnosed breast cancer patients (N = 443) were given access for 6 months to one of four different configurations of CHESS: (1) Information, (2...

Motion Estimation in Echocardiography Using Sparse Representation and Dictionary Learning.

This paper introduces a new method for cardiac motion estimation in 2D ultrasound images. The motion estimation problem is formulated as an energy minimization, whose data fidelity term is built using the assumption that the images are corrupted by multiplicative Rayleigh noise. In addition to a classical spatial smoothness constraint, the proposed method exploits the sparse properties of the cardiac motion to regularize the solution via an appropriate dictionary learning step. The proposed method is evalua...

Jointly Learning Structured Analysis Discriminative Dictionary and Analysis Multiclass Classifier.

In this paper, we propose an analysis mechanism-based structured analysis discriminative dictionary learning (ADDL) framework. The ADDL seamlessly integrates ADDL, analysis representation, and analysis classifier training into a unified model. The applied analysis mechanism can make sure that the learned dictionaries, representations, and linear classifiers over different classes are independent and discriminating as much as possible. The dictionary is obtained by minimizing a reconstruction error and an an...

Reaching Non-Negative Edge Consensus of Networked Dynamical Systems.

In this paper, the problem of non-negative edge consensus of undirected networked linear time-invariant systems is addressed by associating each edge of the network with a state variable, for which a distributed algorithm is constructed. Sufficient conditions referring only to the number of edges are derived for non-negative edge consensus of the networked systems. Subsequently, the linear programming method and a low-gain feedback technique are introduced to simplify the design of the feedback gain matrix ...

Finite-Time Synchronization of Networks via Quantized Intermittent Pinning Control.

This technical correspondence considers finite-time synchronization of dynamical networks by designing aperiodically intermittent pinning controllers with logarithmic quantization. The control scheme can greatly reduce control cost and save both communication channels and bandwidth. By using multiple Lyapunov functions and convex combination techniques, sufficient conditions formulated by a set of linear matrix inequalities are derived to guarantee that all the node systems are synchronized with an isolated...

A point kernel algorithm for microbeam radiation therapy.

Microbeam Radiation Therapy (MRT) is a treatment approach in radiation therapy where the treatment field is spatially fractionated into arrays of a few tens of micrometre wide planar beams of unusually high peak doses separated by low dose regions of several hundred micrometre width. In preclinical studies, this treatment approach has proven to spare normal tissue more effectively than conventional radiation therapy, while being equally efficient in tumour control. So far dose calculations in MRT, a prerequ...

Towards an in-plane methodology to track breast lesions by using mammograms and patient-specific finite element simulations.

In breast cancer screening or diagnosis, it is usual to combine different images in order to locate a lesion as accurately as possible. These images are generated by using a single or several imaging techniques. As X-ray based mammography is used widespread, a breast lesion is located in the same plane of the image (mammogram), but tracking of a breast lesion across mammograms corresponding to different views is a daring task for medical physicians. According to this, simulation tools and methodologies that...

Evaluating the effectiveness of facebook to impact the knowledge of evidence-based employment practices by individuals with traumatic brain injury: A knowledge translation random control study.

Individuals with traumatic brain injury (TBI) experience difficulty with obtaining and maintaining employment post-injury. Although vocational rehabilitation (VR) can be one option to provide individuals with TBI support and services to lead to successful employment outcomes, information about these services can be difficult and confusing to navigate. Providing information on evidence-based employment practices to individuals with TBI through social media could be an effective approach.

Translation, Cross-Cultural Adaptation and Validation of the Farsi Version of NIH Task Force's Recommended Multidimensional Minimal Dataset for Research on Chronic Low Back Pain.

Translation and cultural adaptation of the National Institutes of Health (NIH) Task Force's minimal dataset.

The Impact of Nondifferential Exposure Misclassification on the Performance of Propensity Scores for Continuous and Binary Outcomes: A Simulation Study.

To investigate the ability of the propensity score (PS) to reduce confounding bias in the presence of nondifferential misclassification of treatment, using simulations.

Medical genetic services in a developing country: lesson from Thailand.

To give an example of how advances in medical genetics impact a developing country and how Thailand struggle to improve medical genetics services.

Reconstructing promoter activity from Lux bioluminescent reporters.

The bacterial Lux system is used as a gene expression reporter. It is fast, sensitive and non-destructive, enabling high frequency measurements. Originally developed for bacterial cells, it has also been adapted for eukaryotic cells, and can be used for whole cell biosensors, or in real time with live animals without the need for euthanasia. However, correct interpretation of bioluminescent data is limited: the bioluminescence is different from gene expression because of nonlinear molecular and enzyme dynam...

The operation of a Research and Development (R&D) program and its significance for practice change in community pharmacy.

Community pharmacy practice in Australia is changing and Research and Development (R&D) in community pharmacy plays an important role in contributing to the changes. A range of Cognitive Pharmacy Services (CPS) were developed from R&D programs, yet their implementation has been minimal indicating slow practice change within community pharmacy. Given the vital role of R&D, little is known about the operation and the extent to which it has been effective in supporting practice change in community pharmacy.

Timing and adequate attendance of antenatal care visits among women in Ethiopia.

Although ANC services are increasingly available to women in low and middle-income countries, their inadequate use persists. This suggests a misalignment between aims of the services and maternal beliefs and circumstances. Owing to the dearth of studies examining the timing and adequacy of content of care, this current study aims to investigate the timing and frequency of ANC visits in Ethiopia.

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