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19,810 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 Report

STABILIZER

Charlie Curtsinger, Emery D. Berger · 2013 · ACM SIGARCH Computer Architecture News

Researchers and software developers require effective performance evaluation. Researchers must evaluate optimizations or measure overhead. Software developers use automatic performance regression tests to discover when changes improve or…

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Negative / Null Result ReportOpen accessSocial Sciences

Testing the status‐legitimacy hypothesis: Predicting system justification using objective and subjective socioeconomic status in China and the United States

Evan A. Valdes, James H. Liu, Matt N Williams · 2022 · Asian Journal Of Social Psychology

The status‐legitimacy hypothesis proposes that those who are most disadvantaged by unequal social systems are even more likely than members of more advantaged groups to provide ideological support for the very social system that is responsible for their disadvantages. Li, Yang, Wu, and Kou (2020, Personality and Social Psychology Bulletin ) sought to expand the generalizability of this hypothesis by testing it in China, addressing inconsistencies surrounding the empirical support for this hypothesis by postulating that the construct of status should be separated into an objective and subjectiv

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

A pharmacogenetic study of aldehyde oxidase I in patients treated with XK469

Jacqueline Ramı́rez, Tae Won Kim, Wanqing Liu et al. · 2013 · Pharmacogenetics and Genomics

XK469 (NSC 697887) is a selective topoisomerase II β inhibitor eliminated mainly by aldehyde oxidase I (AOX1). We performed a candidate gene study to investigate whether AOX1 genetic variation contributes to interindividual variability in…

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Negative / Null Result ReportOpen accessMedicine

Characterization of a Novel Tanay Virus Isolated From Anopheles sinensis Mosquitoes in Yunnan, China

Lu Zhao, Caroline Mwaliko, Evans Atoni et al. · 2019 · Frontiers in Microbiology

Globally, mosquitoes are known to be competent vectors to various arboviruses that cause serious and debilitating diseases to humans and animals. Conversely, mosquitoes harbor a wide array of insect specific viruses (ISVs) that are generally neglected. Extensive characterization of these ISVs is important in understanding their persistence infection effect on host behavior and arbovirus transmission. Herein, we report first time isolation of Tanay virus (TANAV) isolate YN15_103_01 in Anopheles sinensis mosquitoes from Yunnan Province, China. Phylogenetically, the isolate’s nucleotide identity

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Negative / Null Result ReportOpen accessBusiness, Management and Accounting

Impact of Acquisitions on the Financial Performance of the Acquiring Companies in Kenya: A Case Study of Listed Acquiring Firms at the Nairobi Securities Exchange

George Gitonga Inoti · 2014 · Journal of Finance and Accounting

This study sought to determine whether acquisitions enhance corporate financial performance. The general objective of the study was to assess the effects of acquisitions on the financial performance of the acquiring companies in Kenya. The…

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Negative / Null Result ReportOpen accessSocial Sciences

Application of Bloom’s Taxonomy in Categorization of Cognitive Process Development in Colleges

Selina Banda, Florence Phiri, Jack Kaale et al. · 2023

Bloom’s Taxonomy is crucial in any teaching and learning environment because it determines direction for a course of study. This study assessed application of Bloom’s Taxonomy in courses of study offered in colleges in Lusaka District. Objectives were: Assess the application of Bloom’s Taxonomy in setting learning outcomes for the courses; Assess reflection of Bloom’s Taxonomy in activities set for course participants; Ascertain significance attached to Bloom’s Taxonomy in courses of study designed for participants. The study employed a mixed methodology, in particular employing a descriptive

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Negative / Null Result ReportMedicine

In situcell–matrix mechanics in tendon fascicles and seeded collagen gels: implications for the multiscale design of biomaterials

Neil A. Duncan, Sabina B. Bruehlmann, Christopher Hunter et al. · 2012 · Computer Methods in Biomechanics & Biomedical Engineering

Designing biomaterials to mimic and function within the complex mechanobiological conditions of connective tissues requires a detailed understanding of the micromechanical environment of the cell. The objective of our study was to measure…

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Negative / Null Result ReportOpen accessMedicine

Serum Uric Acid Level as a Biomarker in Idiopathic and Genetic (p.A53T Alpha-Synuclein Carriers) Parkinson’s Disease: Data from the PPMI Study

Christos Koros, Athina‐Maria Simitsi, Dimitra Papadimitriou et al. · 2020 · Journal of Parkinson s Disease

BACKGROUND: Blood uric acid level represents an emerging biomarker in Parkinson's disease (PD). Whether uric acid levels change in genetic forms of PD is just beginning to be explored. OBJECTIVE: The aim of the present study was to assess differences in serum uric acid level among PD patients harboring the p.A53T mutation in the alpha-synuclein gene, idiopathic PD, and healthy controls. METHODS: Longitudinal 5-year serum uric acid measurement data of 369 de novo idiopathic PD patients and 174 age- and gender-matched healthy controls have been downloaded from the Parkinson's Progression Markers

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Negative / Null Result ReportOpen accessAgricultural and Biological Sciences

Response of broilers to supplementation of branched-chain amino acids blends with different valine contents in the starter period under summer conditions

Canan Kop Bozbay, Ahmet Akdag, Helin Atan et al. · 2020 · Animal Bioscience

OBJECTIVE: The objectives of this study were to compare the effects of normal and low protein content (PC) of starter diet supplemented or not with blends of branched-chain amino acids (BCAAs) on growth performance of broilers under summer conditions and to investigate whether these effects altered some quality traits and the characteristics of gastrointestinal tract. METHODS: A total of 768 mixed-sex broiler chicks (Ross 308, one-d-old) with an average initial body weight (BW) of 47.6±1.03 g were allocated into six treatments with four replications in 2×3 factorial arrangement. Factors were:

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Negative / Null Result ReportOpen accessMedicine

Integrating large language model-based agents into a virtual patient chatbot for clinical anamnesis training

Nicolas Laverde, Christian Grévisse, Sandra Ximena Jaramillo-Rincón et al. · 2025 · Computational and Structural Biotechnology Journal

Effective communication is crucial for trust-building, accurate information gathering, and clinical decision-making in healthcare. Despite its emphasis in medical curricula, traditional training methods, such as role-playing with…

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Negative / Null Result ReportOpen accessMedicine

Sensitivity of the UK Clinical Practice Research Datalink to Detect Neurodevelopmental Effects of Medicine Exposure in Utero: Comparative Analysis of an Antiepileptic Drug-Exposed Cohort

Rachel Charlton, Anita McGrogan, Julia Snowball et al. · 2017 · Drug Safety

Electronic healthcare data have several advantages over prospective observational studies, but the sensitivity of data on neurodevelopmental outcomes and its comparability with data generated through other methodologies is unknown. The…

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Negative / Null Result ReportAgricultural and Biological Sciences

Cortical Neurons Derived from Equine Induced Pluripotent Stem Cells Are Susceptible to Neurotropic Flavivirus Infection and Replication: An In Vitro Model for Equine Neuropathic Diseases

Patrick R.J. Fortuna, Helle Bielefeldt‐Ohmann, Dmitry A. Ovchinnikov et al. · 2018 · Stem Cells and Development

Horses are susceptible to a number of neurotropic viruses, including West Nile virus (WNV), which is a pathogen of global significance in both horses and humans. However, there are no in vitro models with which to study infectious…

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Negative / Null Result ReportOpen accessMedicine

Microstructural White Matter Characteristics in Parkinson's Disease With Depression: A Diffusion Tensor Imaging Replication Study

Colleen Lacey, Lisa Ohlhauser, Jodie R. Gawryluk · 2019 · Frontiers in Neurology

Background Clarifying the neuropathology of depression as a symptom of Parkinson's disease (PD) has been the goal of recent neuroimaging studies; however, results have been conflicting and lack replication. The purpose of the current study was to replicate recent methods that have used diffusion tensor imaging (DTI) to compare individuals with PD with and without depression and to extend previous findings to allow for a better understanding of the results. Methods Thirty-seven participants with de novo PD were retrieved from the Parkinson's Progression Marker's Initiative (PPMI) and were separ

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Negative / Null Result ReportOpen accessAgricultural and Biological Sciences

Eristalis flower flies can be mechanical vectors of the common trypanosome bee parasite, Crithidia bombi

Abby E. Davis, Kaitlin R. Deutsch, Alondra M. Torres et al. · 2021 · Scientific Reports

Flowers can be transmission platforms for parasites that impact bee health, yet bees share floral resources with other pollinator taxa, such as flies, that may be hosts or non-host vectors (i.e., mechanical vectors) of parasites. Here, we assessed whether the fecal-orally transmitted gut parasite of bees, Crithidia bombi, can infect Eristalis tenax flower flies. We also investigated the potential for two confirmed solitary bee hosts of C. bombi, Osmia lignaria and Megachile rotundata, as well as two flower fly species, Eristalis arbustorum and E. tenax, to transmit the parasite at flowers. We

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Negative / Null Result ReportOpen accessEngineering

Mathematical Modeling of Operational Reliability of Mine Lifting Equipment Based on Censored Data

Denis A. Zadkov, Nikita MARTYUSHEV, Boris V. Malozyomov et al. · 2026 · Mathematics

In this study, a comprehensive mathematical method for modeling the operational reliability of mine hoisting equipment under conditions of incomplete and heavily censored data is developed. The analyzed dataset includes 259 observations collected over a five-year period for six critical components, with the overall level of censoring reaching 62% and exceeding 70% for long life mechanical subsystems. Considering right, left, and interval censoring, the paper proposes a unified statistical procedure that combines empirical estimation of failure rates with parametric identification using Weibull

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Negative / Null Result ReportOpen accessMedicine

Safety of Avacopan for the Treatment of Antineutrophil Cytoplasmic Antibody–Associated Vasculitis: Combined Data From Three Clinical Trials

Peter A. Merkel, Michael George, Huibin Yue et al. · 2025 · ACR Open Rheumatology

OBJECTIVE: This study aimed to report the safety of avacopan, an oral selective complement C5a receptor antagonist, using pooled data from clinical trials in patients with antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis…

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Negative / Null Result ReportOpen accessMedicine

Efficacy, public health impact and optimal use of the Takeda dengue vaccine

Bethan Cracknell Daniels, Neil M. Ferguson, Ilaria Dorigatti · 2025 · Nature Medicine

Dengue is the most common arboviral infection, causing substantial morbidity and mortality globally. The licensing of Qdenga, a second-generation vaccine developed by Takeda Pharmaceuticals, is therefore timely, but the potential public health impact of vaccination across transmission settings needs to be evaluated. To address this, we characterized Qdenga's efficacy profile using mathematical models calibrated to published clinical trial data and estimated the public health impact of routine vaccine use. We find that efficacy against both virologically confirmed dengue and hospitalization dep

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Negative / Null Result ReportOpen accessHealth Professions

Changes in Clinician Time Expenditure and Visit Quantity With Adoption of Artificial Intelligence–Powered Scribes

Lisa S. Rotenstein, A. Jay Holmgren, Robert Thombley et al. · 2026 · JAMA

Importance: Artificial intelligence (AI)-enabled scribes have been proposed to reduce electronic health record (EHR) burden and improve clinician satisfaction. There is limited evidence about their associated results across multiple sites…

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Negative / Null Result ReportMedicine

The effects of prehospital TXA on mortality and neurologic outcomes in patients with traumatic intracranial hemorrhage: A subgroup analysis from the prehospital TXA for TBI trial

Susan Rowell, Eric N. Meier, Tatiana Hoyos Gomez et al. · 2024 · The Journal of Trauma: Injury, Infection, and Critical Care

BACKGROUND: In the prehospital tranexamic acid (TXA) for traumatic brain injury (TBI) trial, TXA administered within 2 hours of injury in the out-of-hospital setting did not reduce mortality in all patients with moderate/severe traumatic…

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Negative / Null Result ReportOpen accessMedicine

Feasibility of two levels of protein intake in patients with colorectal cancer: findings from the Protein Recommendation to Increase Muscle (PRIMe) randomized controlled pilot trial

Katherine L. Ford, Michael B. Sawyer, Sunita Ghosh et al. · 2024 · ESMO Open

•Patients were able to increase and sustain dietary protein intake from preintervention levels.•Over one-half of patients in the 2.0 g/kg/day group maintained or gained MM with a 12-week targeted nutrition intervention.•This work…

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Negative / Null Result ReportOpen accessMedicine

Cancer cachexia: molecular basis and therapeutic advances

Yuting Tan, Rui Xue, Yuwei Pan et al. · 2026 · Signal Transduction and Targeted Therapy

The dynamic interplay between neoplastic cells and the host has been increasingly recognized as important players in the pathogenesis of cancer cachexia, a syndrome affecting ~50-80% of cancer patients with various incidences of different types of malignancies. Despite its prevalence, a comprehensive understanding of cancer cachexia progression, with a holistic view at the cross-organismal, cellular and molecular levels, remains elusive. In this review, we undertake an in-depth exploration of the relevant target organs and their regulatory roles in cancer cachexia, with a particular focus on m

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Negative / Null Result ReportOpen accessHealth Professions

Social inclusion of people with severe mental illness: a review of current practices, evidence and unmet needs, and future directions

Claire Henderson, Yasuhiro Kotera, Brynmor Lloyd‐Evans et al. · 2026 · World Psychiatry

Social inclusion means being able to participate in activities valued within one's community or wider society as one would wish. People with severe mental illness (i.e., psychoses, bipolar disorder, and severe depression) experience some…

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