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Browse the failure-mode index

21,681 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

Diagnostic performance of plasma Aβ42/40 ratio, p‐tau181, GFAP, and NfL along the continuum of Alzheimer's disease and non‐AD dementias: An international multi‐center study

James D. Doecke, Giovanni Bellomo, Lisa Vermunt et al. · 2025 · Alzheimer s & Dementia

INTRODUCTION: Plasma phosphorylated tau (p-tau)181, glial fibrillary acidic protein (GFAP), neurofilament light chain (NfL), and amyloid beta ratio (Aβ42/40) may have diagnostic and prognostic value in Alzheimer's disease (AD). Here we assess which markers can best identify AD from controls and other non-AD dementias in a large international multi-center study. METHODS: Plasma samples (n = 1298) were collected from six international centers. Aβ40, Aβ42, GFAP, NfL, and p-tau181 were measured using single molecule array. In each group, AD diagnosis/co-pathology was defined according to cerebrosp

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Negative / Null Result ReportOpen accessNeuroscience

Inflammation and Huntington’s disease – a neglected therapeutic target?

Sophie E. Field, Annabel J. Curle, Roger A. Barker · 2024 · Expert Opinion on Investigational Drugs

INTRODUCTION: Huntington's Disease (HD) is a genetic neurodegenerative disease for which there is currently no disease-modifying treatment. One of several underlying mechanisms proposed to be involved in HD pathogenesis is inflammation;…

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Negative / Null Result ReportOpen accessAgricultural and Biological Sciences

Unmanned Ground Vehicles for Continuous Crop Monitoring in Agriculture: Assessing the Readiness of Current ICT Technology

Maurizio Agelli, Nicola Corona, Fabio Maggio et al. · 2024 · Machines

Continuous crop monitoring enables the early detection of field emergencies such as pests, diseases, and nutritional deficits, allowing for less invasive interventions and yielding economic, environmental, and health benefits. The work organization of modern agriculture, however, is not compatible with continuous human monitoring. ICT can facilitate this process using autonomous Unmanned Ground Vehicles (UGVs) to navigate crops, detect issues, georeference them, and report to human experts in real time. This review evaluates the current state of ICT technology to determine if it supports auton

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Negative / Null Result ReportOpen accessMedicine

Type 2 Diabetes and the Multifaceted Gut-X Axes

Hezixian Guo, L.-T. Pan, Qiuyi Wu et al. · 2025 · Nutrients

Type 2 diabetes (T2D) is a complex metabolic disease characterized by chronic hyperglycemia due to insulin resistance and inadequate insulin secretion. Beyond the classically implicated organs, emerging evidence highlights the gut as a central player in T2D pathophysiology through its interactions with metabolic organs. The gut hosts trillions of microbes and enteroendocrine cells that influence inflammation, energy homeostasis, and hormone regulation. Disruptions in gut homeostasis (dysbiosis and increased permeability) have been linked to obesity, insulin resistance, and β-cell dysfunction,

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Oncolytic viruses: advanced strategies in cancer therapy

Danli Xiao, Huarong Zhang, Ye Liu et al. · 2026 · Signal Transduction and Targeted Therapy

Oncolytic viruses (OVs) represent a promising strategy in cancer immunotherapy, as they selectively infect and lyse tumor cells while simultaneously triggering robust antitumor immune responses. By inducing immunogenic cell death, OVs enhance tumor antigen presentation and initiate a systemic immune response, effectively transforming the tumor microenvironment from an immune-suppressive state to an immune-permissive state. In addition to exerting direct oncolytic effects, OVs modulate key tumor-associated biological processes, including tumor angiogenesis and extracellular matrix remodeling, d

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Negative / Null Result ReportOpen accessMedicine

Acute minocycline administration reduces brain injury and improves long-term functional outcomes after delayed hypoxemia following traumatic brain injury

Marta Celorrio, Kirill Shumilov, Camryn Payne et al. · 2022 · Acta Neuropathologica Communications

Clinical trials of therapeutics for traumatic brain injury (TBI) demonstrating preclinical efficacy for TBI have failed to replicate these results in humans, in part due to the absence of clinically feasible therapeutic windows for administration. Minocycline, an inhibitor of microglial activation, has been shown to be neuroprotective when administered early after experimental TBI but detrimental when administered chronically to human TBI survivors. Rather than focusing on the rescue of primary injury with early administration of therapeutics which may not be clinically feasible, we hypothesiz

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Negative / Null Result ReportOpen accessMedicine

Metabolic crossroads in insulin resistance: exploring lipid dysregulation and inflammation

Saeede Saadati, Rasoul Godini, Anjana Reddy et al. · 2025 · Frontiers in Immunology

Insulin resistance is a central pathological feature of several chronic metabolic disorders, including obesity, type 2 diabetes, polycystic ovary syndrome, and cardiovascular disease. While its pathogenesis is multifactorial, lipid dysregulation and chronic low-grade inflammation are recognised as two major, interconnected processes that impair insulin action across multiple tissues. This review summarises core mechanistic themes linking these processes, with a focus on three key signalling pathways that are particularly relevant to metabolic regulation and to the interplay between lipid metab

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Negative / Null Result ReportOpen accessMedicine

EFFECT OF DIFFERENT BALANCE TRAINING PROGRAMS ON POSTURAL CONTROL IN CHRONIC ANKLE INSTABILITY: A RANDOMIZED CONTROLLED TRIAL

Noha Mahmoud Youssef, Azza Mohammed Abdelmohsen, Ahmed Atteya Ashour et al. · 2026 · PubMed

BACKGROUND: Chronic ankle instability (CAI) is a common sequence of ankle sprain. Conservative treatment of CAI is currently accepted as a primary mean of managing the condition and preventing of recurrence. OBJECTIVES: The purpose of the…

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Negative / Null Result ReportOpen accessPsychology

Limited generalisation of changes in attentional bias following attentional bias modification with the visual probe task

Bram Van Bockstaele, Elske Salemink, Susan M. Bögels et al. · 2015 · Cognition & Emotion

Although attentional bias modification (ABM) can change anxiety, recent studies failed to replicate such effects, possibly because the visual probe ABM failed to induce changes in attentional bias (AB). We investigated whether visual probe…

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Negative / Null Result ReportOpen accessComputer Science

Comparing conventional statistical models and machine learning in a small cohort of South African cardiac patients

Preesha Premsagar, Colleen Aldous, Tonya M. Esterhuizen et al. · 2022 · Informatics in Medicine Unlocked

Machine learning is used to process big data volumes with complex non-linear relationships between predictive variables and predictions. Research into the usefulness of machine learning in small data volumes remains limited. To compare…

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Negative / Null Result ReportOpen accessVeterinary

Not statistically significant, but still scientific

Rachael L. Brown · 2017 · Animal Sentience

Birch’s formulation is persuasive but not nuanced enough to capture at least one situation where it is reasonable to invoke the precautionary principle (PP): when we have multiple, weak, but convergent, lines of evidence that a species is…

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Negative / Null Result ReportMedicine

No significant effect of cannabis use on the count and percentage of circulating CD4 T‐cells in HIV‐HCV co‐infected patients (ANRS CO13‐HEPAVIH French cohort)

Fabienne Marcellin, C. Lions, Éric Rosenthal et al. · 2016 · Drug and Alcohol Review

INTRODUCTION AND AIMS: Despite cannabis use being very common in patients co-infected with HIV and hepatitis C virus (HCV), its effect on these patients' immune systems remains undocumented. Documenting the potential effect of cannabis use…

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Negative / Null Result ReportOpen accessNeuroscience

Long-Term Survival and Differentiation of Human Neural Stem Cells in Nonhuman Primate Brain with no Immunosuppression

Sang‐Rae Lee, Hong J. Lee, Sang-Hoon Cha et al. · 2015 · Cell Transplantation

Cellular fate of human neural stem cells (hNSCs) transplanted in the brain of nonhuman primates (NHPs) with no immunosuppression was determined at 22 and 24 months posttransplantation (PTx) regarding survival, differentiation, and tumorigenesis. Survival of hNSCs labeled with magnetic nanoparticles was successfully detected around injection sites in the brain at 22 months PTx by MRI. Histological examination of brain sections with H&E and Prussian blue staining at 24 months revealed that most of the grafted hNSCs were found located along the injection tract. Grafted hNSCs were found to differe

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Negative / Null Result ReportOpen accessEarth and Planetary Sciences

Melt addition to mid-ocean ridge peridotites increases spinel Cr# with no significant effect on recorded oxygen fugacity

Suzanne Birner, Elizabeth Cottrell, J. M. Warren et al. · 2021 · Earth and Planetary Science Letters

Mid-ocean ridge peridotites record significantly greater variability in major and trace elements, isotopic compositions, and thermodynamic properties such as oxygen fugacity (fO2) than do their basaltic counterparts. This variability may derive from modern ridge processes related to melting and melt-rock interaction or from long-lived source heterogeneity related to recycled material or ancient melting events. In this study, we investigate variations in spinel geochemistry as well as silicate major and trace element chemistry and oxygen fugacity of a suite of peridotites from a single segment

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Replication FailureOpen accessPsychology

Genome-Wide Association Study of Receptive Language Ability of 12-Year-Olds

Nicole Harlaar, Emma L. Meaburn, Marianna E. Hayiou‐Thomas et al. · 2014 · Journal of Speech Language and Hearing Research

PURPOSE: Researchers have previously shown that individual differences in measures of receptive language ability at age 12 are highly heritable. In the current study, the authors attempted to identify some of the genes responsible for the…

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Negative / Null Result ReportOpen accessPsychology

Sequential Bayes Factor designs in developmental research: Studies on early word learning

Nivedita Mani, Melanie S. Schreiner, Julia Brase et al. · 2021 · Developmental Science

Developmental research, like many fields, is plagued by low sample sizes and inconclusive findings. The problem is amplified by the difficulties associated with recruiting infant participants for research as well as the increased variability in infant responses. With sequential testing designs providing a viable alternative to paradigms facing such issues, the current study implemented a Sequential Bayes Factor (SBF) design on three findings in the developmental literature. In particular, using the framework described by Schönbrödt and colleagues (2017), we examined infants' sensitivity to mis

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Negative / Null Result ReportOpen accessEngineering

Generation and characterisation of gallium titanate surfaces through hydrothermal ion-exchange processes

Matthew D. Wadge, Bryan W. Stuart, Kathryn G. Thomas et al. · 2018 · Materials & Design

Infection negation and biofilm prevention are necessary developments needed for implant materials. Furthermore, an increase in publications regarding gallium (Ga) as an antimicrobial ion has resulted in bacterial-inhibitory surfaces incorporating gallium as opposed to silver (Ag). The authors present the production of novel gallium titanate surfaces through hydrothermal ion-exchange reactions. Commercially-pure Ti (S0: Cp-Ti) was initially suspended in NaOH solutions to obtain sodium titanate (S1: Na2TiO3) layers ca. 0.5–1 μm in depth (2.4 at.% Na). Subsequent suspension in Ga(NO3)3 (S2: Ga2(T

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Negative / Null Result ReportOpen accessHealth Professions

Occupational exposure to extremely low-frequency magnetic fields and cardiovascular disease mortality in a prospective cohort study

Tom Koeman, Pauline Slottje, Hans Kromhout et al. · 2013 · Occupational and Environmental Medicine

OBJECTIVES: Although a study among utility workers found an increased risk for acute myocardial infarction and arrhythmia-related deaths associated with occupational extremely low-frequency magnetic fields (ELF-MF) exposure, later studies…

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Negative / Null Result ReportOpen accessBusiness, Management and Accounting

The Effect of Money Supply, Exchange Rate, and Interest Spread toward the Performance of Stock Market in Malaysia

Yeoh Kai Qing, Suhal Kusairi · 2019 · WIDYAKALA JOURNAL OF PEMBANGUNAN JAYA UNIVERSITY

The stock market has become a significant role in the economy and has attracted investor's attention, as it is to generate funds and make an investment decision for companies and investors as well. Therefore, the objective of this study is…

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Negative / Null Result ReportChemistry

Intrinsic Optical Activity and Conformational Flexibility: The Role of Size-Dependent Ring Morphology in Model Cycloketones

Priyanka Lahiri, Kenneth B. Wiberg, Patrick H. Vaccaro · 2013 · The Journal of Physical Chemistry A

The optical rotatory dispersion of two monocyclic ketones, (R)-3-methylcyclopentanone [R-3MCP] and (R)-3-methylcyclohexanone [R-3MCH], has been investigated under isolated and solvated conditions to explore the role of ring size/morphology…

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Negative / Null Result ReportOpen accessNeuroscience

Elevating the field for applying neuroimaging to individual patients in psychiatry

David R. Roalf, Martijn Figee, Desmond J. Oathes · 2024 · Translational Psychiatry

Although neuroimaging has been widely applied in psychiatry, much of the exuberance in decades past has been tempered by failed replications and a lack of definitive evidence to support the utility of imaging to inform clinical decisions. There are multiple promising ways forward to demonstrate the relevance of neuroimaging for psychiatry at the individual patient level. Ultra-high field magnetic resonance imaging is developing as a sensitive measure of neurometabolic processes of particular relevance that holds promise as a new way to characterize patient abnormalities as well as variability

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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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