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Browse the failure-mode index

21,222 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 ReportPsychology

Can Grey parrots (Psittacus erithacus) succeed on a “complex” foraging task failed by nonhuman primates (Pan troglodytes, Pongo abelii, Sapajus apella) but solved by wrasse fish (Labroides dimidiatus)?

Irene M. Pepperberg, Leigh Ann Hartsfield · 2014 · Journal of comparative psychology

Linking specific cognitive abilities of nonhuman species on a laboratory task to their evolutionary history-ecological niche can be a fruitful exercise in comparative psychology. Crucial issues, however, are the choice of task, the…

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Negative / Null Result ReportOpen accessMedicine

A Novel Bat Herpesvirus Encodes Homologues of Major Histocompatibility Complex Classes I and II, C-Type Lectin, and a Unique Family of Immune-Related Genes

Huajun Zhang, Shawn Todd, Mary Tachedjian et al. · 2012 · Journal of Virology

Herpesviruses or herpesviral sequences have been identified in various bat species. Here, we report the isolation, cell tropism, and complete genome sequence of a novel betaherpesvirus from the bat Miniopterus schreibersii (MsHV). In…

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Negative / Null Result ReportOpen accessSocial Sciences

Work–family reconciliation policies and women’s and mothers’ labor market outcomes in rich democracies

David Brady, Agnes Blome, Julie A. Kmec · 2018 · Socio-Economic Review

Abstract Prominent research has claimed that work–family reconciliation policies trigger ‘tradeoffs’ and ‘paradoxes’ in terms of gender equality with adverse labor market consequences for women. These claims have greatly influenced debates…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Partial Deficiency of Sphingosine-1-Phosphate Lyase Confers Protection in Experimental Autoimmune Encephalomyelitis

Andreas Billich, Thomas Baumruker, Christian Beerli et al. · 2013 · PLoS ONE

BACKGROUND: Sphingosine-1-phosphate (S1P) regulates the egress of T cells from lymphoid organs; levels of S1P in the tissues are controlled by S1P lyase (Sgpl1). Hence, Sgpl1 offers a target to block T cell-dependent inflammatory processes. However, the involvement of Sgpl1 in models of disease has not been fully elucidated yet, since Sgpl1 KO mice have a short life-span. METHODOLOGY: We generated inducible Sgpl1 KO mice featuring partial reduction of Sgpl1 activity and analyzed them with respect to sphingolipid levels, T-cell distribution, and response in models of inflammation. PRINCIPAL FIN

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Failed Experiment ReportOpen accessMedicine

Protection Against Staphylococcus aureus by Antibody to the Polyglycerolphosphate Backbone of Heterologous Lipoteichoic Acid

Christian Theilacker, Andrea Kropec, Felix Hammer et al. · 2012 · The Journal of Infectious Diseases

Type 1 lipoteichoic acid (LTA) is present in many clinically important gram-positive bacteria, including enterococci, streptococci, and staphylococci, and antibodies against LTA have been shown to opsonize nonencapsulated Enterococcus…

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Negative / Null Result ReportOpen accessMaterials Science

Micelle carriers based on dendritic macromolecules containing bis-MPA and glycine for antimalarial drug delivery

Elisabet Martí Coma-Cros, Alexandre Lancelot, María San Anselmo et al. · 2019 · Biomaterials Science

Biomaterials for antimalarial drug transport still need to be investigated in order to attain nanocarriers that can tackle essential issues related to malaria treatment, e.g. complying with size requirements and targeting specificity for their entry into Plasmodium-infected red blood cells (pRBCs), and limiting premature drug elimination or drug resistance evolution. Two types of dendritic macromolecule that can form vehicles suitable for antimalarial drug transport are herein explored. A new hybrid dendritic-linear-dendritic block copolymer based on Pluronic® F127 and amino terminated 2,2'-bi

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Negative / Null Result ReportOpen accessNursing

Understanding the mechanisms of glutamine action in critically ill patients

Gisele P. Oliveira, Cristina Márcia Dias, Paolo Pelosi et al. · 2010 · Anais da Academia Brasileira de Ciências

Glutamine (Gln) is an important energy source and has been used as a supplementary energy substrate. Furthermore, Gln is an essential component for numerous metabolic functions, including acid-base homeostasis, gluconeogenesis, nitrogen…

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Negative / Null Result ReportOpen accessMedicine

Inhibitory effect of novel iron chelator, 1-(N-acetyl-6-aminohexyl)-3-hydroxy-2-methylpyridin-4-one (CM1) and green tea extract on growth of Plasmodium falciparum

Phitsinee Thipubon, Chairat Uthaipibull, Sumalee Kamchonwongpaisan et al. · 2015 · Malaria Journal

BACKGROUND: Iron is an essential micronutrient required by all living organisms including malaria parasites (Plasmodium spp.) for many biochemical reactions, especially growth and multiplication processes. Therefore, malaria parasite needs to take up the iron from outside or/and inside the parasitized red blood cells (PRBC). Iron chelators are widely used for the treatment of thalassaemia-related iron overload and also inhibit parasite growth at levels that are non-toxic to mammalian cells. METHODS: Inhibitory effect of 1-(N-acetyl-6-aminohexyl)-3-hydroxy-2-methylpyridin-4-one (CM1) and green

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Negative / Null Result ReportOpen accessMedicine

Initial Clinical Experience with a Modulated Holmium Laser Pulse—Moses Technology: Does It Enhance Laser Lithotripsy Efficacy?

Michael Mullerad, Jonatan R. A. Aguinaga, Tareq Aro et al. · 2017 · Rambam Maimonides Medical Journal

OBJECTIVE: High-power Holmium Laser (120H) has a unique modulated pulse mode, Moses™ technology. Moses technology modulates the laser pulse to separate the water (vapor bubble), then deliver the remaining energy through the bubble. Proprietary laser fibers were designed for the Moses technology. Our aim was to compare stone lithotripsy with and without the Moses technology. METHODS: We designed a questionnaire for the urologist to fill immediately after each ureteroscopy in which the Lumenis 120H was used. We compared procedures with (n=23) and without (n=11) the use of Moses technology. Surge

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Negative / Null Result ReportOpen accessSocial Sciences

Success, Failure or "No Significant Difference"? The Arguments For and Against Technology as a Learning Tool

Mary Burns · 2013 · International Journal of Emerging Technologies in Learning (iJET)

The question of whether computers have positively or negatively impacted student learning is still hotly contested in educational technology circles, particularly in the area of international development, by proponents and critics of technology in education. Overall, research still provides conflicting answers to this question. Nonetheless, the abundant research on effective school change and innovation implementation points to practices which those who promote technology in schools should tap. This paper outlines the long-term structural conditions that can lead to the deep change technology

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Negative / Null Result ReportOpen accessEarth and Planetary Sciences

Chloroplast symbiosis in a marine ciliate: ecophysiology and the risks and rewards of hosting foreign organelles

George B. McManus, Donald M. Schoener, Katharine Haberlandt · 2012 · Frontiers in Microbiology

Simultaneous use of both heterotrophic and autotrophic metabolism ("mixotrophy") is common among protists. Strombidium rassoulzadegani is a planktonic mixotrophic marine ciliate that saves chloroplasts from its algal food and obtains a nutritional subsidy via photosynthesis. Cultures from the northeast, northwest, and southwest Atlantic Ocean show similar numerical response parameters (maximum growth rate, food concentration at which growth is half its maximum, and threshold food concentration for growth), and some isolates have been maintained in vitro for over 3 years. This ciliate grows equ

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Negative / Null Result ReportOpen accessMedicine

Pre- and post-operative anti-PD-L1 plus anti-angiogenic therapies in mouse breast or renal cancer models of micro- or macro-metastatic disease

Florence T.H. Wu, Ping Xu, Annabelle Chow et al. · 2018 · British Journal of Cancer

There are phase 3 clinical trials underway evaluating anti-PD-L1 antibodies as adjuvant (postoperative) monotherapies for resectable renal cell carcinoma (RCC) and triple-negative breast cancer (TNBC); in combination with antiangiogenic VEGF/VEGFR2 inhibitors (e.g., bevacizumab and sunitinib) for metastatic RCC; and in combination with chemotherapeutics as neoadjuvant (preoperative) therapies for resectable TNBC. This study investigated these and similar clinically relevant drug combinations in highly translational preclinical models of micro- and macro-metastatic disease that spontaneously de

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Negative / Null Result ReportOpen accessMedicine

A segregation index combining phenotypic (clinical characteristics) and genotypic (gene expression) biomarkers from a urine sample to triage out patients presenting with hematuria who have a low probability of urothelial carcinoma

L. Kavalieris, P.J. O’Sullivan, James M. Suttie et al. · 2015 · BMC Urology

BACKGROUND: Hematuria can be symptomatic of urothelial carcinoma (UC) and ruling out patients with benign causes during primary evaluation is challenging. Patients with hematuria undergoing urological work-ups place significant clinical and financial burdens on healthcare systems. Current clinical evaluation involves processes that individually lack the sensitivity for accurate determination of UC. Algorithms and nomograms combining genotypic and phenotypic variables have largely focused on cancer detection and failed to improve performance. This study aimed to develop and validate a model inc

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Negative / Null Result ReportOpen accessDecision Sciences

Towards end-to-end automation of AI research

Chris Lu, Cong Lu, R. T. Lange et al. · 2026 · Nature

Abstract The automation of science is a long-standing ambition in artificial intelligence (AI) research 1,2 . Although the community has made substantial progress in automating individual components of the scientific process, a system that autonomously navigates the entire research life cycle—from conception to publication—has remained out of reach. Here we present a pipeline for automating the entire scientific process end to end. We present The AI Scientist, which creates research ideas, writes code, runs experiments, plots and analyses data, writes the entire scientific manuscript, and perf

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Interplay of oxidative stress and antioxidant mechanisms in cancer development and progression

Klaudia Jomová, Suliman Yousef Alomar, Richard Valko et al. · 2025 · Archives of Toxicology

Abstract Cellular systems responsible for the formation and removal of reactive oxygen species (ROS), functioning within physiological limits, are essential for maintaining intracellular redox balance. This state is known as oxidative eustress. Key redox signaling molecules, such as superoxide anion radical (O 2 •— ) and hydrogen peroxide (H 2 O 2 ), operate at nanomolar concentrations and are produced by NADPH oxidases (regulated by various factors), the mitochondrial electron transport chain (ETC), and numerous enzymes. In addition, cell signaling is influenced by nitric oxide (NO • ) and re

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Negative / Null Result ReportOpen accessNursing

SPMs exert anti-inflammatory and pro-resolving effects through positive allosteric modulation of the prostaglandin EP4 receptor

Mohamad Wessam Alnouri, Kenneth Anthony Roquid, Rémy Bonnavion et al. · 2024 · Proceedings of the National Academy of Sciences

Inflammation is a protective response to pathogens and injury. To be effective it needs to be resolved by endogenous mechanisms in order to avoid prolonged and excessive inflammation, which can become chronic. Specialized pro-resolving mediators (SPMs) are a group of lipids derived from omega-3 fatty acids, which can induce the resolution of inflammation. How SPMs exert their anti-inflammatory and pro-resolving effects is, however, not clear. Here, we show that SPMs such as protectins, maresins, and D-series resolvins function as biased positive allosteric modulators (PAM) of the prostaglandin

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Significant difference between sirolimus and paclitaxel nanoparticles in anti-proliferation effect in normoxia and hypoxia: The basis of better selection of atherosclerosis treatment

Youlu Chen, Yong Zeng, Xiaowei Zhu et al. · 2020 · Bioactive Materials

Compared with paclitaxel, sirolimus has been more used in the treatment of vascular restenosis gradually as an anti-proliferative drug, but few basic studies have elucidated its mechanism. The anti-proliferative effects of sirolimus or…

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Negative / Null Result ReportOpen accessHealth Professions

Nutritional Management in Adult Patients With Dysphagia: Position Paper From Japanese Working Group on Integrated Nutrition for Dysphagic People

Junko Ueshima, Akio Shimizu, Keisuke Maeda et al. · 2022 · Journal of the American Medical Directors Association

This position paper prepared by the Japanese Working Group on Integrated Nutrition for Dysphagic People (JWIND) aims to summarize the need for nutritional management in adult patients with dysphagia, the issues that nutrition professionals should address, and the promising approaches as well as to propose a vision for the future of nutritional care for adult patients with dysphagia. JWIND is a joint certification system recognized by the Japan Dietetic Association and the Japanese Society of Dysphagia Rehabilitation; its members are mostly experts known as "Certified Specialist of Registered D

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Negative / Null Result ReportOpen accessMedicine

Myxomavirus-Derived Serpin Prolongs Survival and Reduces Inflammation and Hemorrhage in an Unrelated Lethal Mouse Viral Infection

Hao Chen, Donghang Zheng, Jeff Abbott et al. · 2013 · Antimicrobial Agents and Chemotherapy

Lethal viral infections produce widespread inflammation with vascular leak, clotting, and bleeding (disseminated intravascular coagulation [DIC]), organ failure, and high mortality. Serine proteases in clot-forming (thrombotic) and…

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Negative / Null Result ReportOpen accessMedicine

Randomized phase III trial of amrubicin/cisplatin versus etoposide/cisplatin as first-line treatment for extensive small-cell lung cancer

Yan Sun, Ying Cheng, Xuezhi Hao et al. · 2016 · BMC Cancer

BACKGROUND: Extensive-disease small-cell lung cancer (ED-SCLC) is characterized by rapid progression and relapse, despite high initial response rates to chemotherapy. The primary objective of this trial was to demonstrate the non-inferiority of amrubicin and cisplatin (AP) combination therapy compared with the standard first-line regimen of etoposide and cisplatin (EP) for previously untreated ED-SCLC in a Chinese population. When non-inferiority was verified, the objective was switched from non-inferiority to superiority. METHODS: From June 2008 to July 2010, 300 patients were enrolled and ra

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Negative / Null Result ReportOpen accessMedicine

Adjuvant radiotherapy for completely resected stage 2 thymoma

Abigail T. Berman, Leslie A. Litzky, Virginia A. LiVolsi et al. · 2011 · Cancer

BACKGROUND: The clinical benefit of postoperative mediastinal radiation for completely resected Masaoka stage 2 thymoma remains controversial. Due to its indolent nature and infrequent recurrences, no study has definitively determined the…

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Negative / Null Result ReportOpen accessMedicine

High-Dose Inhaled Nitric Oxide in Acute Hypoxemic Respiratory Failure Due to COVID-19: A Multicenter Phase II Trial

Raffaele Di Fenza, Naman S. Shetty, Stefano Gianni et al. · 2023 · American Journal of Respiratory and Critical Care Medicine

Abstract Rationale The effects of high-dose inhaled nitric oxide on hypoxemia in coronavirus disease (COVID-19) acute respiratory failure are unknown. Objectives The primary outcome was the change in arterial oxygenation (PaO2/Fi O2) at 48…

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Negative / Null Result ReportOpen accessMedicine

Patients with carotid atherosclerosis who underwent or did not undergo carotid endarterectomy: outcome on mood, cognition and quality of life

Mauro Giovanni Carta, Maria Efisia Lecca, Luca Saba et al. · 2015 · BMC Psychiatry

BACKGROUND: To compare the six-month outcome on mood, cognition and quality of life (QoL) in patients with severe carotid atherosclerosis (CA) who underwent carotid endarterectomy (CEA) with subjects who refused treatment. METHODS: Cohort study on consecutive inpatients with CA (stenosis ≥ 50 %) (N = 46; age 72.56 ± 7.26; male 65.2 %). Intervention cohort: subjects who decided to undergo CEA (N = 35); Control cohort patients who refused CEA (N = 11). DSM-IV-Psychiatric diagnosis made by clinicians using interviews, QoL measured by Short Form Health Survey (SF-12); cognitive performance by WAIS

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Negative / Null Result ReportOpen accessMedicine

Islatravir Has a High Barrier to Resistance and Exhibits a Differentiated Resistance Profile from Approved Nucleoside Reverse Transcriptase Inhibitors (NRTIs)

Tracy L. Diamond, Winnie Ngo, Min Xu et al. · 2022 · Antimicrobial Agents and Chemotherapy

Islatravir (ISL) is a nucleoside reverse transcriptase translocation inhibitor (NRTTI) that inhibits human immunodeficiency virus (HIV) reverse transcription by blocking reverse transcriptase (RT) translocation on the primer:template. ISL…

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Replication FailureOpen accessNeuroscience

Short-term transcutaneous vagus nerve stimulation increases pupil size but does not affect EEG alpha power: A replication of Sharon et al. (2021, Journal of Neuroscience)

Beth Lloyd, Franz Wurm, Roy de Kleijn et al. · 2023 · Brain stimulation

BackgroundTranscutaneous auricular vagus nerve stimulation (taVNS) has been tested as a potential treatment for pharmaco-resistant epilepsy and depression. Its clinical efficacy is thought to depend on taVNS-induced activation of the locus coeruleus and other neuromodulator systems. However, unlike for invasive VNS in rodents, there is little evidence for an effect of taVNS on noradrenergic activity.ObjectiveWe attempted to replicate recently published findings by Sharon et al. (2021), showing that short bursts of taVNS transiently increased pupil size and decreased EEG alpha power, two correl

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Negative / Null Result ReportOpen accessNeuroscience

Engineering a Blood-Retinal Barrier With Human Embryonic Stem Cell-Derived Retinal Pigment Epithelium: Transcriptome and Functional Analysis

Shaomin Peng, Geliang Gan, Caihong Qiu et al. · 2013 · Stem Cells Translational Medicine

Retinal degenerations are a major cause of impaired vision in the elderly. Degenerations originate in either photoreceptors or the retinal pigment epithelium (RPE). RPE forms the outer blood-retinal barrier and functions intimately with…

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