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Browse the failure-mode index

21,234 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 accessMedicine

No Significant Association Between the Fecal Microbiome and the Presence of Irritable Bowel Syndrome-type Symptoms in Patients with Quiescent Inflammatory Bowel Disease

Oliver Shutkever, David J. Gracie, Caroline Young et al. · 2018 · Inflammatory Bowel Diseases

Background: The microbiome is implicated in the pathogenesis of inflammatory bowel disease (IBD) and irritable bowel syndrome (IBS). Whether a distinct microbiome profile is associated with the reporting of IBS-type symptoms in IBD…

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Negative / Null Result ReportOpen accessSocial Sciences

Academic Performance of Students with Disabilities in Higher Education: Insights from a Study of One Catholic College

Laura M. Wasielewski · 2016 · Journal of Catholic Education

The purpose of this study was to determine if students with disabilities perform comparably to students without disabilities academically at a small liberal arts college. Quantitative results were gathered through the comparison of end of semester and cumulative grade point averages for students with disabilities and students without disabilities (n=56). The t test for independent means and a 2-way analysis of variance were used to test hypotheses. Students without disabilities had significantly higher academic performances than students with disabilities as measured by grade point averages. F

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Negative / Null Result ReportOpen accessMedicine

Detecting Corticospinal Tract Impairment in Tumor Patients With Fiber Density and Tensor-Based Metrics

Lucius S. Fekonja, Ziqian Wang, Dogu Baran Aydogan et al. · 2021 · Frontiers in Oncology

Tumors infiltrating the motor system lead to significant disability, often caused by corticospinal tract injury. The delineation of the healthy-pathological white matter (WM) interface area, for which diffusion magnetic resonance imaging (dMRI) has shown promising potential, may improve treatment outcome. However, up to 90% of white matter (WM) voxels include multiple fiber populations, which cannot be correctly described with traditional metrics such as fractional anisotropy (FA) or apparent diffusion coefficient (ADC). Here, we used a novel fixel-based along-tract analysis consisting of cons

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Laboratory divergence of Methylobacterium extorquens AM1 through unintended domestication and past selection for antibiotic resistance

Sean M. Carroll, Katherine S. Xue, Christopher J. Marx · 2014 · BMC Microbiology

BACKGROUND: A common assumption of microorganisms is that laboratory stocks will remain genetically and phenotypically constant over time, and across laboratories. It is becoming increasingly clear, however, that mutations can ruin strain integrity and drive the divergence or "domestication" of stocks. Since its discovery in 1960, a stock of Methylobacterium extorquens AM1 ("AM1") has remained in the lab, propagated across numerous growth and storage conditions, researchers, and facilities. To explore the extent to which this lineage has diverged, we compared our own "Modern" stock of AM1 to a

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Negative / Null Result ReportMathematics

Priming Mathematics Word Problem Structures in a Rural Elementary Classroom

Cynthia C. Griffin, Joseph Calvin Gagnon, Maggie H. Jossi et al. · 2018 · Rural Special Education Quarterly

This study examined mathematics strategy instruction that primes the common underlying structures of word problems using explicit instruction in a rural elementary classroom with fourth- and fifth-grade students with and without…

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Negative / Null Result ReportOpen accessMedicine

Voxel-based 18F-FET PET segmentation and automatic clustering of tumor voxels: A significant association with IDH1 mutation status and survival in patients with gliomas

Paul Blanc‐Durand, Axel Van Der Gucht, Antoine Verger et al. · 2018 · PLoS ONE

INTRODUCTION: Aim was to develop a full automatic clustering approach of the time-activity curves (TAC) from dynamic 18F-FET PET and evaluate its association with IDH1 mutation status and survival in patients with gliomas. METHODS: Thirty-seven patients (mean age: 45±13 y) with newly diagnosed gliomas and dynamic 18F-FET PET before any histopathologic investigation or treatment were retrospectively included. Each dynamic 18F-FET PET was realigned to the first image and spatially normalized in the Montreal Neurological Institute template. A tumor mask was semi-automatically generated from Z-sco

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Negative / Null Result ReportMedicine

Validation of a proteomic biomarker panel to diagnose minor-stroke and transient ischaemic attack: phase 2 of SpecTRA, a large scale translational study

Andrew M. Penn, Maximilian B. Bibok, Viera Saly et al. · 2018 · Biomarkers

OBJECTIVE: To validate our previously developed 16 plasma-protein biomarker panel to differentiate between transient ischaemic attack (TIA) and non-cerebrovascular emergency department (ED) patients.METHOD: Two consecutive cohorts of ED…

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Negative / Null Result ReportOpen accessPsychology

“Can You Remember What Was in Your Pocket When You Were Stung by a Bee?”: Eliciting Cues to Deception by Asking the Unanticipated

Meiling Liu, Pär Anders Granhag, Sara Landström et al. · 2010 · The Open Criminology Journal

In this paper we focused on children's deception (10-12 years, Experiment 1), and adult's ability detect deception in children (Experiment 2). The self-presentational perspective By asking unanticipated questions we put the liars in the…

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Negative / Null Result ReportOpen accessEnvironmental Science

Spatial prediction of soil properties in two contrasting physiographic regions in Brazil

Michele Duarte de Menezes, Sérgio Henrique Godinho Silva, Carlos Rogério de Mello et al. · 2016 · Scientia Agricola

This study compared the performance of ordinary kriging (OK) and regression kriging (RK) to predict soil physical-chemical properties in topsoil (0-15 cm). Mean prediction of error and root mean square of prediction error were used to assess the prediction methods. Two watersheds with contrasting soil-landscape features were studied, for which the prediction methods were performed differently. A multiple linear stepwise regression model was performed with RK using digital terrain models (DTMs) and remote sensing images in order to choose the best auxiliary covariates. Different pedogenic facto

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Negative / Null Result ReportOpen accessEnvironmental Science

Using Silviculture to Influence Carbon Sequestration in Southern Appalachian Spruce-Fir Forests

Patrick Moore, R. Justin DeRose, James N. Long et al. · 2012 · Forests

Enhancement of forest growth through silvicultural modification of stand density is one strategy for increasing carbon (C) sequestration. Using the Fire and Fuels Extension of the Forest Vegetation Simulator, the effects of even-aged, uneven-aged and no-action management scenarios on C sequestration in a southern Appalachian red spruce-Fraser fir forest were modeled. We explicitly considered C stored in standing forest stocks and the fate of forest products derived from harvesting. Over a 100-year simulation period the even-aged scenario (250 Mg C ha−1) outperformed the no-action scenario (241

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Negative / Null Result ReportOpen accessMedicine

Outcomes of Induction Chemotherapy for Head and Neck Cancer Patients

Jinhua Chen, Yu‐Chun Yen, Shing‐Hwa Liu et al. · 2016 · Medicine

The use of induction chemotherapy (CT) is controversial. We compared the survival of head and neck cancer patients receiving docetaxel- or platinum-based induction CT before concomitant chemoradiotherapy (CCRT) with the survival of those receiving upfront CCRT alone. Data from the National Health Insurance and cancer registry databases in Taiwan were linked and analyzed. We enrolled patients who had head and neck cancer between January 1, 2002 and December 31, 2011. Follow-up was from the index date to December 31, 2013. We included head and neck patients diagnosed according to the Internation

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Negative / Null Result ReportOpen accessEnvironmental Science

Variation in tree mortality and regeneration affect forest carbon recovery following fuel treatments and wildfire in the Lake Tahoe Basin, California, USA

Chris H. Carlson, Solomon Z. Dobrowski, Hugh D. Safford · 2012 · Carbon Balance and Management

BACKGROUND: Forest fuel treatments have been proposed as tools to stabilize carbon stocks in fire-prone forests in the Western U.S.A. Although fuel treatments such as thinning and burning are known to immediately reduce forest carbon stocks, there are suggestions that these losses may be paid back over the long-term if treatments sufficiently reduce future wildfire severity, or prevent deforestation. Although fire severity and post-fire tree regeneration have been indicated as important influences on long-term carbon dynamics, it remains unclear how natural variability in these processes might

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Negative / Null Result ReportOpen accessMedicine

Effect of calcium vs. placebo on long-term outcomes in patients with out-of-hospital cardiac arrest

Mikael Fink Vallentin, Asger Granfeldt, Carsten Meilandt et al. · 2022 · Resuscitation

OBJECTIVE: The Calcium for Out-of-hospital Cardiac Arrest (COCA) trial was a randomized, placebo-controlled, double-blind trial of calcium for out-of-hospital cardiac arrest. The primary and secondary outcomes have been reported previously. This article describes the long-term outcomes of the trial. METHODS: Patients aged ≥18 years were included if they had a non-traumatic out-of-hospital cardiac arrest during which they received adrenaline. The trial drug consisted of calcium chloride (5 mmol) or saline placebo given after the first dose of adrenaline and again after the second dose of adrena

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Negative / Null Result ReportOpen accessMedicine

Significant differences in the cell‐wall mannans from three Candida glabrata strains correlate with antifungal drug sensitivity

S. Takahashi, Atsushi Kudoh, Yoshio Okawa et al. · 2012 · FEBS Journal

Candida glabrata is often the second or third most common cause of candidiasis after Candida albicans. C. glabrata infections are difficult to treat, often resistant to many azole antifungal agents and are associated with a high mortality…

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Negative / Null Result ReportEarth and Planetary Sciences

Contrasting Air Mass Advection Explains Significant Differences in Boundary Layer Depth Seasonal Cycles Under Onshore Versus Offshore Flows

Sandip Pal, Temple R. Lee · 2019 · Geophysical Research Letters

Abstract The complexities in the atmospheric boundary layer depth (BLD) features over coastal regions pose challenges for meteorological forecasts, air quality, greenhouse gas mixing and transport, and wind energy production. Here, for the…

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Negative / Null Result ReportOpen accessMedicine

Randomized Phase IIb Study of Brimonidine Drug Delivery System Generation 2 for Geographic Atrophy in Age-Related Macular Degeneration

William R. Freeman, Francesco Bandello, Eric H. Souied et al. · 2023 · Ophthalmology Retina

To evaluate the safety and efficacy of repeat injections of Brimonidine Drug Delivery System (Brimo DDS) Generation 2 (Gen 2) containing 400-μg brimonidine in patients with geographic atrophy (GA) secondary to age-related macular…

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Negative / Null Result ReportOpen accessAgricultural and Biological Sciences

Local-scale virome depiction in Medellín, Colombia, supports significant differences between Aedes aegypti and Aedes albopictus

Arley Calle-Tobón, Juliana Pérez-Pérez, Nicolás Forero-Pineda et al. · 2022 · PLoS ONE

Aedes spp. comprise the primary group of mosquitoes that transmit arboviruses such as dengue, Zika, and chikungunya viruses to humans, and thus these insects pose a significant burden on public health worldwide. Advancements in next-generation sequencing and metagenomics have expanded our knowledge on the richness of RNA viruses harbored by arthropods such as Ae. aegypti and Ae. albopictus. Increasing evidence suggests that vector competence can be modified by the microbiome (comprising both bacteriome and virome) of mosquitoes present in endemic zones. Using an RNA-seq-based metataxonomic app

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Negative / Null Result ReportOpen accessMedicine

Could Ovarian Cancer Prediction Models Improve the Triage of Symptomatic Women in Primary Care? A Modelling Study Using Routinely Collected Data

Garth Funston, Gary Abel, Emma J. Crosbie et al. · 2021 · Cancers

CA125 is widely used as an initial investigation in women presenting with symptoms of possible ovarian cancer. We sought to develop CA125-based diagnostic prediction models and to explore potential implications of implementing model-based thresholds for further investigation in primary care. This retrospective cohort study used routinely collected primary care and cancer registry data from symptomatic, CA125-tested women in England (2011-2014). A total of 29,962 women were included, of whom 279 were diagnosed with ovarian cancer. Logistic regression was used to develop two models to estimate o

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Negative / Null Result Report

US line-ups outperform UK line-ups

Travis M. Seale-Carlisle, Laura Mickes · 2016 · Royal Society Open Science

In the USA and the UK, many thousands of police suspects are identified by eyewitnesses every year. Unfortunately, many of those suspects are innocent, which becomes evident when they are exonerated by DNA testing, often after having been…

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Negative / Null Result Report

Significant Associations of Neurological Complications of Herpes Zoster With Stroke in Rheumatoid Arthritis Patients

Tsai‐Ling Liao, Ching‐Heng Lin, Hsin‐Hua Chen et al. · 2017 · Journal of the American Heart Association

Background Accumulating evidence suggests an increased risk of stroke after herpes zoster ( HZ ). This risk is elevated in immunocompromised patients. The incidence of HZ in Asia is higher than in Western countries. However, the…

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Negative / Null Result ReportOpen accessMedicine

Genome-Wide Association Study of Irritable vs. Elated Mania Suggests Genetic Differences between Clinical Subtypes of Bipolar Disorder

Tiffany A. Greenwood, John R. Kelsoe · 2013 · PLoS ONE

The use of clinical features to define subtypes of a disorder may aid in gene identification for complex diseases. In particular, clinical subtypes of mania may distinguish phenotypic subgroups of bipolar subjects that may also differ genetically. To assess this possibility, we performed a genome-wide association study using genotype data from the Bipolar Genome Study (BiGS) and subjects that were categorized as having either irritable or elated mania during their most severe episode. A bipolar case-only analysis in the GAIN bipolar sample identified several genomic regions that differed betwe

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Negative / Null Result ReportOpen accessEnvironmental Science

Montpellier broom (Genista monspessulana) and Spanish broom (Spartium junceum) in South Africa: An assessment of invasiveness and options for management

Sjirk Geerts, Pieter Willem Botha, Vernon Visser et al. · 2013 · South African Journal of Botany

The legumes (Fabaceae) Genista monspessulana and Spartium junceum are major invaders in several other parts of the world, but not yet so in South Africa. We determine their current distributions in South Africa at different spatial scales, assess population structure (soil seed banks and size at reproduction) evaluate current management activities, and provide recommendations for control (including assessing the feasibility of nation-wide eradication). G. monspessulana occurs at nine localities in three quarter-degree cells, covering a total of 22.7 ha. S. junceum is much more widespread, occu

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Negative / Null Result ReportMedicine

Replication of not-known-vector flaviviruses in mosquito cells is restricted by intracellular host factors rather than by the viral envelope proteins

Nathalie Charlier, Andrew D. Davidson, Kai Dallmeier et al. · 2010 · Journal of General Virology

Chimeric yellow fever virus 17D (YFV-17D) and dengue virus type 2 (DENV2) carrying the surface proteins of Modoc virus (MODV), a not-known-vector (NKV) flavivirus, replicated efficiently in mammalian (Vero-B) and mosquito (C6/36) cells,…

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