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20,211 real negative results, null findings, and replication failures · Negative / Null Result Report. 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 accessPhysics and Astronomy

Unraveling the Relaxation Dynamics of Uracil: Insights from Time-Resolved X-ray Photoelectron Spectroscopy

Davide Faccialà, M. Bonanomi, Bruno Nunes Cabral Tenorio et al. · 2025 · Journal of the American Chemical Society

High Resolution Image Download MS PowerPoint Slide We report a study of the electronic and nuclear relaxation dynamics of the photoexcited RNA base uracil in the gas phase using time-resolved core-level photoelectron spectroscopy together with high-level calculations. The dynamics was investigated by trajectory surface hopping calculations, and the core ionization energies were calculated for geometries sampled from these. The molecule was excited by a UV laser and dynamics probed on the oxygen, nitrogen, and carbon sites by core electron spectroscopy. We find that the main de-excitation chann

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Negative / Null Result ReportOpen accessEnvironmental Science

Kriging prior regression: A case for kriging-based spatial features with TabPFN in soil mapping

Jonas Schmidinger, Viacheslav Barkov, Sebastian Vogel et al. · 2025 · Computers and Electronics in Agriculture

Machine learning and geostatistics are two fundamentally different frameworks for the prediction and spatial mapping of soil properties. Geostatistics leverages the spatial structure of soil properties, whereas machine learning models capture the relationship between available environmental features and soil properties. We propose a hybrid framework that augments machine learning with spatial context through the engineering of ‘spatial lag’ features derived from ordinary kriging. We call this approach ‘kriging prior regression’ (KpR), as it reverses the logic of regression kriging by incorpera

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Negative / Null Result ReportOpen accessSocial Sciences

Coupling Labor Supply Decisions: An Experiment in India,

Matt Lowe, Madeline McKelway · 2026 · Journal of the European Economic Association

Abstract Joint household decision-making becomes more common as economies develop. Can external intervention advance this transition? We study this question in the context of female employment in India. We randomized which spouse was given…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Targeted Hyaluronan Degradation Enhanced Tumor Growth Inhibition in Gastrointestinal Cancer Models

Fulai Zhou, Guangmao Mu, Honglei Bi et al. · 2025 · Cancers

Background. The dense hyaluronan (HA)-rich stroma in solid tumors can prevent effective tumor growth inhibition by hindering drug delivery and immune cell infiltration. However, the degradation of HA alone by systemic delivery of hyaluronidase has not shown significant improvement of tumor growth inhibition. Objectives/Methods. In this study, we targeted hyaluronan degradation by using antibody–enzyme (AbEn) molecules by fusing antibodies to a recombinant human hyaluronidase (HYAL). Results. The AbEn molecules were stable, retained both antigen-binding and enzymatic activities, and demonstrate

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Negative / Null Result ReportOpen accessAgricultural and Biological Sciences

Agentic AI Framework to Automate Traditional Farming for Smart Agriculture

Muhammad Murad, Muhammad Ahmed, Nizam ul din et al. · 2026 · AgriEngineering

Artificial intelligence (AI) shows great promise for transforming the agriculture sector and can enable the development of many modern farming practices over conventional methods. Nowadays, AI agents and agentic AI have attained popularity due to their autonomous structure and working mechanism. This research work proposes an agentic AI framework that integrates multiple agents developed for farming land to promote climate-smart agriculture and support United Nations (UN) sustainable development goals (SDGs). The developed structure has four agents: Agent A for monitoring soil properties, Agen

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Negative / Null Result ReportOpen accessMedicine

Long‐term passive heat acclimation enhances maximal oxygen consumption via haematological and cardiac adaptation in endurance runners

Elliott J. Jenkins, Joseph A. Killick, Owain Zerilli et al. · 2025 · The Journal of Physiology

Abstract Long‐term heat acclimation has been shown to elevate haemoglobin mass (Hb mass ) and enhance maximal oxygen consumption (). To date, however, all evidence derives from exercise‐induced heat stress, making it unclear whether passive strategies, which allow athletes to maintain training intensities, can produce similar adaptations. Moreover, while heat‐induced increases in are often attributed to haematological changes, adaptation of other convective components of oxygen transport may underpin these improvements. To investigate whether 5 weeks of hot‐water immersion (HWI) would enhance

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Negative / Null Result ReportOpen accessEngineering

SKDAN: A Signal Knowledge-enhanced Domain Adaptation Network for remaining useful life prediction and uncertainty quantification of rolling bearings

Bin Liu, Changfeng Yan, Ming Lv et al. · 2026 · Computers in Industry

Domain adaptation-based methods are extensively applied to predict the Remaining Useful Life (RUL) of rolling bearings under complex operating conditions. However, the nonlinear degradation process of bearings gives rise to markedly…

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Negative / Null Result ReportOpen accessMedicine

Metabolic dysfunction and mitochondrial failure in Alzheimer's disease: integrating pathophysiology, clinical evidence and emerging interventions

Xiaohua Xiao, Xueqin Yan, Chunhua Liang et al. · 2026 · Frontiers in Neurology

Alzheimer's disease (AD) is a gradual and irreversible decline in the brain's ability to function which is not only signified by amyloid-beta plaques and neurofibrillary tangles but also by and metabolic and mitochondrial changes that have a negative impact on the classical neuropathological hallmarks. It is becoming increasingly clear that the central roles in the process of synaptic dysfunction, neuronal death and cognitive decline are played by the brain's impaired glucose utilization, insulin resistance, lipid metabolism alterations, and energy homeostasis disruption. Mitochondrial dysfunc

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Negative / Null Result ReportOpen accessAgricultural and Biological Sciences

Ecology and spread of the North American H5N1 epizootic

Lambodhar Damodaran, Anna S. Jaeger, Louise H. Moncla · 2025 · Nature

Abstract Since late 2021, a panzootic of highly pathogenic H5N1 has devastated wild birds, agriculture and mammals. Here an analysis of 1,818 haemagglutinin sequences from wild birds, domestic birds and mammals reveals that the North American panzootic was driven by around nine introductions into the Atlantic and Pacific flyways, followed by rapid dissemination through wild, migratory birds. Transmission was primarily driven by Anseriformes, while non-canonical species acted as dead-end hosts. In contrast to the epizootic of 2015 (refs. 1,2 ), outbreaks in domestic birds were driven by around

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Nrf2-Activating Natural Compounds in Neurodegenerative Diseases: Targeting Oxidative Stress and Protein Aggregation

Lucia Chico, Erika Schirinzi, Linda Balestrini et al. · 2026 · International Journal of Molecular Sciences

Neurodegenerative diseases (NDs) are among the leading causes of disability and mortality worldwide and are characterized by multifactorial pathogenesis involving interconnected mechanisms, such as oxidative stress, protein misfolding and aggregation, neuroinflammation, and mitochondrial dysfunction. Dysregulation of transcription factors, governing cellular defense responses, particularly nuclear factor erythroid 2-related factor 2 (Nrf2), a key regulator of antioxidant and proteostatic pathways, plays a critical role in neurodegenerative processes. Currently, available pharmacological treatm

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Negative / Null Result ReportOpen accessEnvironmental Science

Advancing mechanical recycling of polypropylene: lessons from sorting, washing, and life cycle assessment

Moritz Mager, Lukas Zeilerbauer, Alexander Felgel-Farnholz et al. · 2026 · Waste Management

European legislation, particularly the Packaging and Packaging Waste Regulation (PPWR), is rapidly increasing the demand for high-quality recycled polypropylene (PP) in packaging applications. Achieving such qualities through mechanical recycling remains challenging due to the heterogeneity of post-consumer waste, while the role of intensified washing in the overall decontamination remains debated. This study evaluates the influence of additional sorting and washing intensity on material properties, product performance, and environmental impacts in mechanical recycling of Dutch post-consumer r

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Negative / Null Result ReportOpen accessMedicine

Tissue-resident macrophage survival depends on mitochondrial function regulated by SerpinB2 in chronic inflammation

Sathish Babu Vasamsetti, Samreen Sadaf, Mohammad A. Uddin et al. · 2026 · Nature Communications

How cellular metabolism facilitates tissue-resident macrophage maintenance remains elusive. Here we show that visceral adipose tissue (VAT)-resident macrophages, unlike monocyte-derived macrophages, are enriched with mitochondrial-specific antioxidant enzymes restraining inflammation and promoting VAT homeostasis and insulin sensitivity. Additionally, VAT resident macrophages express high levels of plasminogen activator inhibitor type 2, encoded by SerpinB2, which is involved in the blood coagulation cascade. SerpinB2 promotes adipose resident macrophage survival by regulating mitochondrial ox

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Negative / Null Result ReportOpen accessNeuroscience

A ratiometric ER calcium sensor for quantitative comparisons across cell types and subcellular regions

Ryan J. Farrell, S. Thomas Hennigan, Kirsten G. Bredvik et al. · 2026 · The Journal of General Physiology

The ER is an important regulator of Ca2+ in cells and dysregulation of ER Ca2+ homeostasis can lead to numerous pathologies. Understanding how various pharmacological and genetic perturbations of ER Ca2+ homeostasis impact cellular…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Distinct microbial mediators link diet to inflammation in Crohn’s disease and ulcerative colitis

L E Mayorga, Arnau Noguera Segura, Laura Campderros et al. · 2026 · Gut

BACKGROUND: Inflammatory bowel disease (IBD) arises from complex interactions among diet, host and gut microbiome. Although diet influences intestinal inflammation, the microbial and metabolic pathways involved, and their differences…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Five‐Year Outcomes and Disease Trajectories in Moderate‐to‐Severe Ulcerative Colitis: A Korean Multicenter Inception Cohort

Byong Duk Ye, Hyo Jong Kim, Dongil Park et al. · 2026 · Journal of Gastroenterology and Hepatology

BACKGROUND AND AIM: The incidence of ulcerative colitis (UC) has been increasing in Asia. Comprehensive data on the long-term course of moderate-to-severe UC remain scarce. This study investigated the clinical outcomes and factors…

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Negative / Null Result ReportOpen accessComputer Science

Biased AI writing assistants shift users’ attitudes on societal issues

Sterling Williams-Ceci, Maurice Jakesch, Advait Bhat et al. · 2026 · Science Advances

Artificial intelligence (AI) writing assistants powered by large language models (LLMs) are increasingly used to make autocomplete suggestions to people as they write text. Can these AI writing assistants affect people’s attitudes in this…

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Negative / Null Result ReportOpen accessPsychology

Assessing the Impact of a Virtual Reality Cognitive Intervention on Tennis Performance in Junior Tennis Players: Pilot Study

Joaquin A. Anguera, Aleem Choudhry, Michael Seaman et al. · 2025 · JMIR Formative Research

Background There is evidence that cognitive training interventions can positively impact executive functions, and that some studies have demonstrated that athletes typically exhibit greater accuracy and faster response times on select cognitive tasks. While the engagement of executive functions is suggested to be part of high-level sporting activities, it is unclear whether such training approaches could directly benefit athletic performance. Objective The objective of this study was to evaluate the impact of a combined virtual reality (VR)– and tablet-based cognitive training intervention on

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Negative / Null Result ReportOpen accessHealth Professions

Occupational injury severity among healthcare workers: a retrospective study

Ghassan M. Khairallah, Samar Al‐Hajj, Hani O. Mowafi et al. · 2025 · BMC Public Health

BACKGROUND: Healthcare workers (HCWs) are exposed to a multitude of hazards in the hospital environment, increasing their risks of sustaining injuries at a higher rate compared to workers in other sectors and resulting in substantial level…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Metabolic anomalies in vitiligo: a new frontier for drug repurposing strategies

Alessia Paganelli, Federica Papaccio, Mauro Picardo et al. · 2025 · Frontiers in Pharmacology

Vitiligo is a chronic autoimmune condition characterized by the destruction of melanocytes, leading to patchy loss of skin depigmentation. Although its precise cause remains unclear, recent evidence suggests that metabolic disturbances, particularly oxidative stress and mitochondrial dysfunction, may play a significant role in the pathogenesis of the disease. Oxidative stress is thought to damage melanocytes and trigger inflammatory responses, culminating in melanocyte immune-mediate destruction. Additionally, patients with vitiligo often exhibit extra-cutaneous metabolic abnormalities such as

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Negative / Null Result ReportOpen accessMedicine

Human microglial transitions at the Aβ–tau inflection point associate with divergent pathways to dementia and resilience

Ashley Lu, Wei-Ting Chen, Maria Dalby et al. · 2026 · Nature Medicine

Alzheimer's disease (AD) is not an inevitable outcome of pathology but a dynamic process shaped by how brain cells respond to amyloid-β (Aβ) and tau. To disentangle these responses, we combined spatial transcriptomics and single-nucleus RNA sequencing of the superior frontal cortex from octogenarians living with or without dementia and from cognitively intact centenarians with comparable Aβ accumulation. We identified six distinct tissue domains representing a spatial pathological continuum of AD, with a key inflection point marked by a shift from Aβ-associated inflammatory changes to tau-asso

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Negative / Null Result ReportOpen accessMathematics

Strategies to address non-proportional hazards between survival curves - Lessons from phase III trials in hepatocellular carcinoma

Ezequiel Mauro, Tiago de Castro, Marcus Zeitlhoefler et al. · 2025 · Journal of Hepatology

BACKGROUND & AIMS: Non-proportional hazards (NPH) can lead to discrepancies between interim (IA) and final analyses (FA) in randomized controlled trials (RCTs) of hepatocellular carcinoma (HCC). We assessed the impact of NPH in pivotal HCC…

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Negative / Null Result ReportOpen accessMaterials Science

Biomaterials in personalized drug delivery: innovations, challenges, and future directions

Adna Hrapović, Nadia Islam, Asmaa Al Bourghli et al. · 2026 · PeerJ

The growing global demand for effective and safe therapeutics has accelerated advances in biomaterials for drug delivery applications. Biomaterials, including polymers, metals, ceramics, and composites, play a central role in modern medical devices and therapeutic systems by enabling controlled interactions with biological environments. Initially defined as inert materials interfacing with biological systems, biomaterials are now rationally engineered to treat, replace, or evaluate tissue and organ functions. Recent progress in regenerative medicine, nanotechnology, and precision healthcare ha

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