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Browse the failure-mode index

21,691 real negative results, null findings, and replication failures. Search the index →

WASTE indexes published research — it does not host or republish full papers. Each entry is a metadata record compiled from open scholarly databases; the abstract is shown in full only where the paper is openly licensed, otherwise a short excerpt under fair use. Classifications are automated and approximate.

Negative / Null Result ReportOpen accessEngineering

On the co-rotational method for geometrically nonlinear topology optimization

Peter D. Dunning · 2020 · Structural and Multidisciplinary Optimization

Abstract This paper investigates the application of the co-rotational method to solve geometrically nonlinear topology optimization problems. The main benefit of this approach is that the tangent stiffness matrix is naturally positive definite, which avoids some numerical issues encountered when using other approaches. Three different methods for constructing the tangent stiffness matrix are investigated: a simplified method, where the linear elastic stiffness matrix is simply rotated; the consistent method, where the tangent stiffness is derived by differentiating residual forces by displacem

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Negative / Null Result Report

Single and repeated intra‐articular injections in the tarsocrural joint with allogeneic and autologous equine bone marrow‐derived mesenchymal stem cells are safe, but did not reduce acute inflammation in an experimental interleukin‐1β model of synovitis

Aimée C. Colbath, Steven W. Dow, Leone S. Hopkins et al. · 2020 · Equine Veterinary Journal

Abstract Background Allogeneic and autologous bone marrow‐derived mesenchymal stem cells (BMDMSCs) have been administered in equine joints for their anti‐inflammatory effects. However, allogeneic BMDMSC offer multiple clinical and…

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Negative / Null Result Report

Did advice on the prescription of sodium valproate reduce prescriptions to women? An observational study in three European countries between 2007 and 2016

Rachel Charlton, Christine Damase‐Michel, Caroline Hurault‐Delarue et al. · 2019 · Pharmacoepidemiology and Drug Safety

Abstract Objectives In November 2014, the CMDh (a regulatory body representing EU Member States) advised doctors not to prescribe sodium valproate for epilepsy or bipolar disorder in preg nant women, in women who can become pregnant, or in…

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Negative / Null Result ReportOpen accessDentistry

Smear layer deproteinization with NaOCl and HOCl: Do application/wash-out times affect dentin bonding of one-step self-etch adhesives?

Kittisak Sanon, Takashi Hatayama, Antonín Tichý et al. · 2022 · Dental Materials Journal

This study investigated the influence of application/wash-out times of sodium hypochlorite (NaOCl) and hypochlorous acid (HOCl) on dentin bond strength of one-step self-etch adhesives (1-SEAs). Human coronal dentin discs with a…

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Negative / Null Result ReportOpen accessAgricultural and Biological Sciences

Refining Pheromone Lures for the Invasive Halyomorpha halys (Hemiptera: Pentatomidae) Through Collaborative Trials in the United States and Europe

Tracy Leskey, Heather Andrews, Angelika Bády et al. · 2021 · Journal of Economic Entomology

Brown marmorated stink bug, Halyomorpha halys, is native to Asia and has invaded North America and Europe inflicting serious agricultural damage to specialty and row crops. Tools to monitor the spread of H. halys include traps baited with…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

MLH1 Region Polymorphisms Show a Significant Association with CpG Island Shore Methylation in a Large Cohort of Healthy Individuals

Andrea J. Savio, Mathieu Lemire, Miralem Mrkonjic et al. · 2012 · PLoS ONE

Single nucleotide polymorphisms (SNPs) are the most common form of genetic variation. We previously demonstrated that SNPs (rs1800734, rs749072, and rs13098279) in the MLH1 gene region are associated with MLH1 promoter island methylation, loss of MLH1 protein expression, and microsatellite instability (MSI) in colorectal cancer (CRC) patients. Recent studies have identified less CpG-dense "shore" regions flanking many CpG islands. These shores often exhibit distinct methylation profiles between different tissues and matched normal versus tumor cells of patients. To date, most epigenetic studie

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Negative / Null Result Report

Dimethyloxalylglycine (DMOG), a Hypoxia Mimetic Agent, Does Not Replicate a Rat Pheochromocytoma (PC12) Cell Biological Response to Reduced Oxygen Culture

RuoLi Chen, Mohammad Alkataan Ahmed, Nicholas Robert Forsyth · 2022 · Biomolecules

Cells respond to reduced oxygen availability predominately by activation of the hypoxia-inducible factor (HIF) pathway. HIF activation upregulates hundreds of genes that help cells survive in the reduced oxygen environment. The aim of this…

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Negative / Null Result ReportOpen accessMedicine

No significant association of serum klotho concentration with blood pressure and pulse wave velocity in a Chinese population

Wanying Liang, Lihong Wang, Jian‐Hang Wei et al. · 2021 · Scientific Reports

Klotho, an important anti-aging protein, may be related to elevated blood pressure (BP) and arterial stiffness. We aimed to investigate associations between the serum klotho concentration and peripheral/central BP and arterial stiffness based on the carotid-femoral pulse wave velocity (cfPWV) in a Chinese population. We invited all inhabitants aged ≥ 18 years in two Dali communities for participation. The SphygmoCor system was used to record radial arterial waveforms. Aortic waveforms were derived using a generalized transfer function. The central BP was assessed by calibrating the brachial BP

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Negative / Null Result ReportOpen accessMedicine

Outcome prediction value of National Early Warning Score in septic patients with community-acquired pneumonia in emergency department: A single-center retrospective cohort study

Haijiang Zhou · 2020 · World Journal of Emergency Medicine

BACKGROUND: To evaluate the accuracy of National Early Warning Score (NEWS) in predicting clinical outcomes (28-day mortality, intensive care unit [ICU] admission, and mechanical ventilation use) for septic patients with community-acquired…

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Negative / Null Result ReportMedicine

A prospective study on split-hand index as a biomarker for the diagnosis of amyotrophic lateral sclerosis

Zhili Wang, Mingsheng Liu, Zhengyi Cai et al. · 2020 · Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration

Objective To determine the practical diagnostic utility of split-hand index (SI) values calculated from F-wave persistence (SIFP) and the F/M amplitude ratio (SIF/M) for differentiating patients with amyotrophic lateral sclerosis (ALS)…

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Negative / Null Result ReportOpen accessEngineering

A National and Regional Greenhouse Gas Breakeven Assessment of EVs across North America

Daniel Rasbash, Kevin Joseph Dillman, Jukka Heinonen et al. · 2023 · Sustainability

Electrification is considered key to decarbonizing the transport sector. While electric vehicles (EVs) lack tailpipe emissions, battery and electricity production can lead to significant emissions. This study analysed whether EVs can effectively mitigate GHG emissions in North America, by calculating two GHG breakeven indicators for EVs and comparing them to internal combustion engine vehicles (ICEVs). EV life cycle emissions were compared to those of ICEVs in Canada, Mexico, and the USA. In addition, this study considered potential national electricity grids evolutions and improvements in bat

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Negative / Null Result ReportOpen accessMedicine

Impact of age on thromboembolic events in patients with non‐valvular atrial fibrillation

Yun Gi Kim, Jong‐Il Choi, Ki Yung Boo et al. · 2019 · Clinical Cardiology

Abstract Background Age is a well‐established risk factor for thromboembolic events in patients with atrial fibrillation (AF). However, the mechanism underlying the association between age and thromboembolic events in AF remains unknown. Methods The prognostic value of age as a risk factor for thromboembolic events was analyzed using data from the Korean National Health Insurance Service (NHIS). In a large‐scale single‐center registry, cardiac hemodynamic parameters were examined to elucidate the cause of increased risk of thromboembolic events in older patients. Results NHIS sample cohort dat

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Negative / Null Result ReportOpen accessDentistry

Remineralization of Artificial Dentin Caries Using Dentin and Enamel Matrix Proteins

Katja Bächli, Patrick R. Schmidlin, Florian J. Wegehaupt et al. · 2019 · Materials

To assess the remineralizing potential of dentin matrix proteins and enamel matrix derivatives (DMPs and EMDs) after application on artificially induced dentin lesions, given the hypothesis that these materials increase the mineral uptake, binding, and mineralization. Forty-eight caries-free human premolars were used. Teeth were cut, polished, and embedded, leaving an open window on the root surface, of which one-third was covered with a flowable composite to preserve the healthy untreated dentin. Then, samples were demineralized in Buskes solution for 33 days. A micro-CT scan prior to treatme

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Clonal diploid and autopolyploid breeding strategies to harness heterosis: insights from stochastic simulation

Marlee R. Labroo, Jeffrey B. Endelman, Dorcus C. Gemenet et al. · 2023 · Theoretical and Applied Genetics

KEY MESSAGE: Reciprocal recurrent selection sometimes increases genetic gain per unit cost in clonal diploids with heterosis due to dominance, but it typically does not benefit autopolyploids. Breeding can change the dominance as well as additive genetic value of populations, thus utilizing heterosis. A common hybrid breeding strategy is reciprocal recurrent selection (RRS), in which parents of hybrids are typically recycled within pools based on general combining ability. However, the relative performances of RRS and other breeding strategies have not been thoroughly compared. RRS can have re

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Negative / Null Result ReportOpen accessEngineering

3D deformable registration of longitudinal abdominopelvic CT images using unsupervised deep learning

Maureen van Eijnatten, Leonardo Rundo, Batenburg, Joost et al. · 2021 · Data Archiving and Networked Services (DANS)

Background and Objectives: Deep learning is being increasingly used for deformable image registration and unsupervised approaches, in particular, have shown great potential. However, the registration of abdominopelvic Computed Tomography…

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Negative / Null Result Report

Estimating replicate time shifts using Gaussian process regression

Qiang Liu, Kevin K. Lin, Bogi Andersen et al. · 2010 · Bioinformatics

Abstract Motivation: Time-course gene expression datasets provide important insights into dynamic aspects of biological processes, such as circadian rhythms, cell cycle and organ development. In a typical microarray time-course experiment,…

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Negative / Null Result ReportOpen accessMedicine

Prospective validation of a seizure diary forecasting falls short

Daniel M. Goldenholz, Celena Eccleston, Robert Moss et al. · 2024 · Epilepsia

OBJECTIVE: Recently, a deep learning artificial intelligence (AI) model forecasted seizure risk using retrospective seizure diaries with higher accuracy than random forecasts. The present study sought to prospectively evaluate the same…

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Negative / Null Result Report

Is There a Significant Difference in Accuracy of Four Intraoral Scanners for Short-Span Fixed Dental Prosthesis? A Comparative In Vitro Study

Anca Jivănescu, Adrian Bara, Andrei-Bogdan Faur et al. · 2021 · Applied Sciences

Is the accuracy of the older generation of IOSs an impediment for obtaining a quality intraoral digital impression? The aim of this study was to evaluate the differences in accuracy between four intraoral scanners (two of the latest IOSs…

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Negative / Null Result ReportOpen accessMedicine

Comparison of Systemic Immune-Inflammation Index and Naples Prognostic Score for Prediction Coronary Artery Severity Patients Undergoing Coronary Computed Tomographic Angiography

Eyüp Özkan, Aslan Erdoğan, Ali Karagöz et al. · 2023 · Angiology

This study compared the predictive power of the systemic immune-inflammation index (SII) and Naples prognostic score (NPS) in determining the severity of coronary artery disease (CAD). The study included 1138 patients who underwent…

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