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19,792 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 accessMedicine

The effect of preoperative chemotherapy treatment in surgically treated intrahepatic cholangiocarcinoma patients—A multi‐institutional analysis

Stefan Buettner, Bas Groot Koerkamp, Aslam Ejaz et al. · 2017 · Journal of Surgical Oncology

INTRODUCTION: While preoperative chemotherapy (pCT) is utilized in many intra-abdominal cancers, the use of pCT among patients with intrahepatic cholangiocarcinoma (ICC) remains ill defined. As such, the objective of the current study was…

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Negative / Null Result ReportOpen accessMedicine

The Era of Antimicrobial Peptides: Use of Hepcidins to Prevent or Treat Bacterial Infections and Iron Disorders

Carolina Barroso, Pedro Carvalho, M.C. Nunes et al. · 2021 · Frontiers in Immunology

The current treatments applied in aquaculture to limit disease dissemination are mostly based on the use of antibiotics, either as prophylactic or therapeutic agents, with vaccines being available for a limited number of fish species and pathogens. Antimicrobial peptides are considered as promising novel substances to be used in aquaculture, due to their antimicrobial and immunomodulatory activities. Hepcidin, the major iron metabolism regulator, is found as a single gene in most mammals, but in certain fish species, including the European sea bass ( Dicentrarchus labrax ), two different hepci

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Negative / Null Result ReportOpen accessEnvironmental Science

RENEWABLE ENERGY CONSUMPTION AND UNEMPLOYMENT IN SOUTH AFRICA

Hlalefang Khobai, Nwabisa Kolisi, Clement Moyo et al. · 2020 · International Journal of Energy Economics and Policy

The importance of renewable energy consumption has grown to a large extent over the recent years. The benefits of renewable energy consumption ranging from improved environmental quality to higher economic growth are well documented. However, the impact of renewable energy consumption on unemployment has received relatively less attention. This study examines the relationship between renewable energy consumption and unemployment in South Africa over the period 1990-2014. The Autoregressive Distributed Lag (ARDL) model was employed to test the long-run and short-run impacts of renewable energy

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Negative / Null Result ReportOpen accessNeuroscience

Evidence of Energetic Optimization during Adaptation Differs for Metabolic, Mechanical, and Perceptual Estimates of Energetic Cost

Natalia Sánchez, Sungwoo Park, James M. Finley · 2017 · Scientific Reports

The theory that the sensorimotor system minimizes energetic cost during locomotion has long been supported by both computational models and empirical studies. However, it has yet to be determined if the behavior to which people converge when exposed to a novel perturbation during locomotion is also energetically optimal. We address this issue in the context of adaptation to walking on a split-belt treadmill, which can impose a left-right asymmetry in step lengths. In response to this asymmetry, participants gradually adjust their foot placement to adopt steps of equal length. Here, we characte

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Negative / Null Result ReportMedicine

Lack of Significant Effect of Bilastine Administered at Therapeutic and Supratherapeutic Doses and Concomitantly With Ketoconazole on Ventricular Repolarization: Results of a Thorough QT Study (TQTS) With QT‐Concentration Analysis

Benoît Tyl, Meriam Kabbaj, Sara M. Azzam et al. · 2011 · The Journal of Clinical Pharmacology

The effect of bilastine on cardiac repolarization was studied in 30 healthy participants during a multiple-dose, triple-dummy, crossover, thorough QT study that included 5 arms: placebo, active control (400 mg moxifloxacin), bilastine at…

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Negative / Null Result ReportOpen accessEconomics, Econometrics and Finance

Oil Prices and Real Exchange Rates in Oil-Exporting Countries: A Bounds Testing Approach

Mohammad R. Jahan‐Parvar, Hassan Mohammadi · 2011 · ˜The œJournal of developing areas

We test the validity of the Dutch disease hypothesis by examining the relationship between real oil prices and real exchange rates in a sample of fourteen oil exporting countries. Autoregressive distributed lag (ARDL) bounds tests of…

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Negative / Null Result ReportOpen accessEnvironmental Science

Do community‐level models describe community variation effectively?

Andrés Baselga, Miguel B. Araújo · 2010 · Journal of Biogeography

Abstract Aim The aim of community‐level modelling is to improve the performance of species distributional models by taking patterns of co‐occurrence among species into account. Here, we test this expectation by examining how well three…

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Negative / Null Result ReportOpen accessMedicine

Fitting methods for intravoxel incoherent motion imaging of prostate cancer on region of interest level: Repeatability and gleason score prediction

Harri Merisaari, Parisa Movahedi, Ileana Montoya Perez et al. · 2016 · Magnetic Resonance in Medicine

Purpose To evaluate different fitting methods for intravoxel incoherent motion (IVIM) imaging of prostate cancer in the terms of repeatability and Gleason score prediction. Methods Eighty‐one patients with histologically confirmed prostate…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

PD-L1 (CD274) and PD-L2 (PDCD1LG2) promoter methylation is associated with HPV infection and transcriptional repression in head and neck squamous cell carcinomas

Alina Franzen, Timo Vogt, Tim Müller et al. · 2017 · Oncotarget

// Alina Franzen 1 , Timo J. Vogt 1 , Tim Müller 2 , Jörn Dietrich 1 , Andreas Schröck 1 , Carsten Golletz 2 , Peter Brossart 3 , Friedrich Bootz 1 , Jennifer Landsberg 4 , Glen Kristiansen 2 and Dimo Dietrich 1 1 Department of Otolaryngology, Head and Neck Surgery, University Hospital Bonn, Bonn, Germany 2 Institute of Pathology, University Hospital Bonn, Bonn, Germany 3 Department of Oncology, Hematology and Rheumatology, University Hospital Bonn, Bonn, Germany 4 Department of Dermatology, Bonn, University Hospital Bonn, Germany Correspondence to: Dimo Dietrich, email: dimo.di

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Negative / Null Result ReportOpen accessMedicine

The Predictive Value of the Fine-Needle Aspiration Diagnosis “Suspicious for a Follicular Neoplasm, Hürthle Cell Type” in Patients With Hashimoto Thyroiditis

Michael H. Roh, Vickie Y. Jo, Edward B. Stelow et al. · 2010 · American Journal of Clinical Pathology

A fine-needle aspiration sample composed exclusively of Hürthle cells is interpreted as "suspicious for a follicular neoplasm, Hürthle cell type" (SFNHCT). Because some nonneoplastic Hürthle cell proliferations in Hashimoto thyroiditis…

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Negative / Null Result ReportOpen accessEnvironmental Science

A Multicentre Open-Label Safety and Efficacy Study of Tetrodotoxin for Cancer Pain

Neil A. Hagen, Bernard Lapointe, May Ong-Lam et al. · 2011 · Current Oncology

BACKGROUND: Cancer pain is highly prevalent, and existing treatments are often insufficient to provide adequate relief. OBJECTIVES: We assessed the long-term safety and efficacy of subcutaneous tetrodotoxin treatment in reducing the intensity of chronic cancer-related pain. METHODS: In this multicentre open-label longitudinal trial, 30 μg tetrodotoxin was administered subcutaneously twice daily for 4 days in a heterogeneous cohort of patients with persistent pain despite opioids and other analgesics. "Responder" was defined as a mean reduction of 30% or more in pain intensity from baseline; an

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Negative / Null Result ReportMedicine

Cross-cultural Adaptation, Reliability and Validity of the DAFS-R in a Sample of Brazilian Older Adults

Fabrício Pereira, Alexandra Martini de Oliveira, Breno S. Diniz et al. · 2010 · Archives of Clinical Neuropsychology

The Direct Assessment of Functional Status-Revised (DAFS-R) is an instrument developed to objectively measure functional capacities required for independent living. The objective of this study was to translate and culturally adapt the…

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Negative / Null Result ReportOpen accessMedicine

Uremic pruritus. Clinical and experimental studies

Mona Ståhle‐Bäckdahl · 2026 · Acta Dermato Venereologica

The aim of the study was to investigate clinical aspects of pruritus in maintenance hemodialysis patients and to evaluate factors of putative pathogenic importance. 60-65% of the patients in a maintenance hemodialysis program during a…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Investigating whether deep learning models for co-folding learn the physics of protein-ligand interactions

Matthew R. Masters, Amr H. Mahmoud, Markus A. Lill · 2025 · Nature Communications

Co-folding models represent a major innovation in deep-learning-based protein-ligand structure prediction. The recent publications of RoseTTAFold All-Atom, AlphaFold3, and others have shown high-quality results on predicting the structures of proteins interacting with small-molecules, nucleic-acids, and other proteins. Despite these advanced capabilities and broad potential, the current study presents critical findings that question the adherence of these models to fundamental physical principles. Through adversarial examples based on established physical, chemical, and biological principles,

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Negative / Null Result ReportOpen accessPharmacology, Toxicology and Pharmaceutics

Novel psychoactive substance consumption is more represented in bipolar disorder than in psychotic disorders: A multicenter‐observational study

T. Acciavatti, Matteo Lupi, Rita Santacroce et al. · 2017 · Human Psychopharmacology Clinical and Experimental

OBJECTIVE: Comorbidities between psychiatric diseases and use of traditional substances of abuse are common. Nevertheless, there are few data regarding the use of novel psychoactive substances (NPS) among psychiatric patients. Aim of this…

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Negative / Null Result ReportOpen accessMedicine

Incidence and prognostic significance of karyotypic subgroups in older patients with acute myeloid leukemia: the Swedish population-based experience

Vladimir Lazarević, A-S Hörstedt, Bertil Johansson et al. · 2014 · Blood Cancer Journal

The Swedish population-based acute myeloid leukemia registry contains data from 3251 patients (excluding acute promyelocytic leukemia) diagnosed between 1997 and 2006. Informative cytogenetic data from 1893 patients were retrospectively…

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Negative / Null Result ReportOpen accessMedicine

A pilot study: effectiveness of local injection of autologous platelet-rich plasma in treating women with stress urinary incontinence

Cheng‐Yu Long, Kun‐Ling Lin, Chin-Ru Shen et al. · 2021 · Scientific Reports

The study aims to evaluate the effectiveness of local injection of autologous platelet rich plasma (A-PRP) as a treatment for women suffering from stress urinary incontinence (SUI). In a prospective intervention study, twenty consecutive women suffering from SUI were treated with A-PRP injection at anterior vaginal wall where mid-urethra locates. Self-reported questionnaires were used to measure pre-treatment, 1 month and 6 months post-treatment symptom severity. Secondary outcomes of sexual function and treatment effect sorted by age were analyzed with valid statistical methods. A-PRP is effe

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Negative / Null Result ReportOpen accessSocial Sciences

Maternal exposure to intimate partner abuse before birth is associated with autism spectrum disorder in offspring

Andrea L. Roberts, Kristen Lyall, Janet W. Rich‐Edwards et al. · 2015 · Autism

We sought to determine whether maternal (a) physical harm from intimate partner abuse during pregnancy or (b) sexual, emotional, or physical abuse before birth increased risk of autism spectrum disorder. We calculated risk ratios for…

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Negative / Null Result ReportOpen accessNeuroscience

Dysregulated brain-gut axis in the setting of traumatic brain injury: review of mechanisms and anti-inflammatory pharmacotherapies

Mahmoud G. El Baassiri, Zachariah Raouf, Sarah Badin et al. · 2024 · Journal of Neuroinflammation

Traumatic brain injury (TBI) is a chronic and debilitating disease, associated with a high risk of psychiatric and neurodegenerative diseases. Despite significant advancements in improving outcomes, the lack of effective treatments underscore the urgent need for innovative therapeutic strategies. The brain-gut axis has emerged as a crucial bidirectional pathway connecting the brain and the gastrointestinal (GI) system through an intricate network of neuronal, hormonal, and immunological pathways. Four main pathways are primarily implicated in this crosstalk, including the systemic immune syste

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Negative / Null Result ReportMedicine

A Comparison of the Ex-PRESS ™ Mini Glaucoma Shunt With Standard Trabeculectomy in the Surgical Treatment of Glaucoma

Lionel A. Marzette, Leon W. Herndon · 2011 · Ophthalmic surgery, lasers & imaging retina

BACKGROUND AND OBJECTIVE: To compare the success and complication rates of patients with glaucoma who had an Ex-PRESS mini glaucoma shunt device implantation (Optonol, Ltd., Neve Ilan, Israel) to those who had conventional trabeculectomy.…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Targeted Reactivation of FMR1 Transcription in Fragile X Syndrome Embryonic Stem Cells

Jill M. Haenfler, Geena Skariah, Caitlin M. Rodriguez et al. · 2018 · Frontiers in Molecular Neuroscience

Fragile X Syndrome (FXS) is the most common inherited cause of intellectual disability and autism. It results from expansion of a CGG nucleotide repeat in the 5’ untranslated region of FMR1. Large expansions elicit repeat and promoter hyper-methylation, heterochromatin formation, FMR1 transcriptional silencing, and loss of the Fragile X protein, FMRP. Efforts aimed at correcting the sequelae resultant from FMRP loss have thus far proven insufficient, perhaps because of FMRP’s pleiotropic functions. As the repeats do not disrupt the FMRP coding sequence, reactivation of endogenous FMR1 gene exp

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Negative / Null Result ReportOpen accessPsychology

No ego-depletion effect without a good control task

Thomas Mangin, Nathalie André, Abdelrhani Benraïss et al. · 2021 · Psychology of sport and exercise

The ego-depletion effect refers to a temporary failure of self-control exertion after first performing an effortful task. This phenomenon has experienced a replication crisis in the past few years. In the present series of experiments, we…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

ASSIGN: context-specific genomic profiling of multiple heterogeneous biological pathways

Ying Shen, Mumtahena Rahman, Stephen Piccolo et al. · 2015 · Bioinformatics

MOTIVATION: Although gene-expression signature-based biomarkers are often developed for clinical diagnosis, many promising signatures fail to replicate during validation. One major challenge is that biological samples used to generate and…

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Negative / Null Result ReportOpen accessDecision Sciences

An Analysis of Bitcoin Price Based on VEC Model

Junpeng Wang, Xue Yubo, Minghao Liu · 2016

As the world's first completely decentralized digital payment system, the emergence of bitcoin represents a revolutionary phenomenon in financial markets. This paper mainly studies the fluctuations of bitcoin price and discusses weather…

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Negative / Null Result ReportOpen accessMedicine

A year of COVID-19 GWAS results from the GRASP portal reveals potential genetic risk factors

Florian Thibord, Melissa V. Chan, Ming‐Huei Chen et al. · 2022 · Human Genetics and Genomics Advances

Host genetic variants influence the susceptibility and severity of several infectious diseases, and the discovery of genetic associations with coronavirus disease 2019 (COVID-19) phenotypes could help to develop new therapeutic strategies…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Significant association between genes encoding virulence factors with antibiotic resistance and phylogenetic groups in community acquired uropathogenic Escherichia coli isolates

Zahra Yazdanpour, Omid Tadjrobehkar, Motahareh Shahkhah · 2020 · BMC Microbiology

BACKGROUND: Antibiotic resistance is an increasing phenomenon in many bacterial pathogens including uropathogenic Escherichia coli. Hypothetical anti-virulent agents could be a solution, but first clear virulence associated gene-pool of antibiotic resistant isolates have to be determined. The aim of this study is to investigate the significant associations between genes encoding VFs with antibiotic resistance and phylogenetic groups in UPEC isolates. RESULTS: The majority of 248 UPEC isolates belonged to phylogenetic group B2 (67.3%). The maximum and minimum resistance was attributed to amoxic

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Predicting male fertility in dairy cattle using markers with large effect and functional annotation data

Juan Pablo Nani, Fernanda Marcondes de Rezende, Francisco Peñagaricano · 2019 · BMC Genomics

BACKGROUND: Fertility is among the most important economic traits in dairy cattle. Genomic prediction for cow fertility has received much attention in the last decade, while bull fertility has been largely overlooked. The goal of this study was to assess genomic prediction of dairy bull fertility using markers with large effect and functional annotation data. Sire conception rate (SCR) was used as a measure of service sire fertility. Dataset consisted of 11.5 k U.S. Holstein bulls with SCR records and about 300 k single nucleotide polymorphism (SNP) markers. The analyses included the use of bo

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