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19,803 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

Treatment with the copper compound CuATSM has no significant effect on motor neuronal pathology in patients with ALS

Yue Yang, Dominic B. Rowe, Heather McCann et al. · 2023 · Neuropathology and Applied Neurobiology

AIMS: Although the orally available brain-penetrant copper compound CuATSM has demonstrated promising effects in SOD1-linked mouse models, the impact of CuATSM on disease pathology in patients with amyotrophic lateral sclerosis (ALS) remains unknown. METHODS: The present study set out to address this deficit by performing the first pilot comparative analysis of ALS pathology in patients that had been administered CuATSM and riluzole [N = 6 cases composed of ALS-TDP (n = 5) and ALS-SOD1 (n = 1)] versus riluzole only [N = 6 cases composed of ALS-TDP (n = 4) and ALS-SOD1 (n = 2)]. RESULTS: Our re

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Negative / Null Result ReportOpen accessMedicine

Barriers to Participation in a Community-Based Program to Control Transmission of Taenia solium in Peru

Michelle Beam, Angela G. Spencer, Lauralee Fernandez et al. · 2018 · American Journal of Tropical Medicine and Hygiene

larvae (neurocysticercosis) is a leading cause of preventable epilepsy worldwide. Effective and sustainable strategies to control parasite transmission in rural endemic communities are needed to prevent the disease. Surveillance and…

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Negative / Null Result ReportOpen accessEconomics, Econometrics and Finance

Peculiarities of export structure in Lithuania: synthesis and analysis

Irina Travkina, Manuela Tvaronavičienė · 2015 · Journal of Entrepreneurship and Sustainability Issues

The research paper discusses the relationship between international trade, especially export, and the economic growth, presented by GDP, in Lithuania over the period of 2000-2015 years. The analysis is started by the historical review of possible types of relationships between exports and economic growth. Furthermore, the paper presents four theoretical propositions as export-led growth (1), growth-driven export (2), a feedback relationship (3) and simple contemporaneous relationship (4). This study examines the importance of the export-led growth hypothesis for Lithuania. The testing is based

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Negative / Null Result ReportOpen accessMedicine

Fatty acid amide hydrolase binding is inversely correlated with amygdalar functional connectivity: a combined positron emission tomography and magnetic resonance imaging study in healthy individuals

Duncan G.J. Green, Jinhee Kim, Stephen J. Kish et al. · 2021 · Journal of Psychiatry and Neuroscience

Background: Upregulation of the endocannabinoid enzyme fatty acid amide hydrolase (FAAH) has been linked to abnormal activity in frontoamygdalar circuits, a hallmark of posttraumatic stress disorder. We tested the hypothesis that FAAH…

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Negative / Null Result ReportOpen accessMedicine

Guapiaçu virus, a new insect-specific flavivirus isolated from two species of Aedes mosquitoes from Brazil

Geovani de Oliveira Ribeiro, Antônio Charlys da Costa, Danielle Elise Gill et al. · 2021 · Scientific Reports

Classical insect-flaviviruses (cISFVs) and dual host-related insect-specific flavivirus (dISFV) are within the major group of insect-specific flavivirus. Remarkably dISFV are evolutionarily related to some of the pathogenic flavivirus, such as Zika and dengue viruses. The Evolutionary relatedness of dISFV to flavivirus allowed us to investigate the evolutionary principle of host adaptation. Additionally, dISFV can be used for the development of flavivirus vaccines and to explore underlying principles of mammalian pathogenicity. Here we describe the genetic characterization of a novel putative

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Negative / Null Result ReportOpen accessAgricultural and Biological Sciences

Introducing the No-Significant-Effect Concentration

Rebecca Fisher, David R. Fox · 2023 · Environmental Toxicology and Chemistry

The no-effect concentration (NEC) is the preferred threshold metric for single-species toxicity tests applied to derive safe concentration thresholds for contaminants in the environment for use in species sensitivity distributions.…

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Negative / Null Result ReportOpen accessMedicine

Genome‐wide association study identifies loci associated with liability to alcohol and drug dependence that is associated with variability in reward‐related ventral striatum activity in African‐ and European‐Americans

Leah Wetherill, Dongbing Lai, Emma C. Johnson et al. · 2019 · Genes Brain & Behavior

Abstract Genetic influences on alcohol and drug dependence partially overlap, however, specific loci underlying this overlap remain unclear. We conducted a genome‐wide association study (GWAS) of a phenotype representing alcohol or illicit…

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Negative / Null Result ReportOpen accessEnvironmental Science

Artificial agri‐environment scheme ponds do not replicate natural environments despite higher aquatic and terrestrial invertebrate richness and abundance

Marina Reyne, Myles Nolan, Henry McGuiggan et al. · 2020 · Journal of Applied Ecology

Abstract Farmland ponds are a highly threatened freshwater habitat which has undergone dramatic losses during the last 200 years due to land drainage schemes and agricultural intensification. Agri‐environment schemes (AES) incentivize farmers to adopt farming methods to benefit biodiversity, yet there are a paucity of data evaluating the success of artificially created AES ponds as analogues of natural ponds in an attempt to recreate lost environments. We examined variation in environmental parameters and aquatic and terrestrial invertebrate communities between 38 natural ponds and 91 artifici

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Negative / Null Result ReportOpen accessBusiness, Management and Accounting

China’s Tourism-Led Foreign Direct Investment Inflows: An Empirical Study

Yawen Chen · 2017 · Modern Economy

Based on the annual data of China from 2000 to 2014, this paper applies the dynamic panel model to study the relationship between inbound tourism and foreign direct investment (FDI). Compared with previous literatures, our analysis is not limited to the study of FDI in single tourism sectors such as hotels and restaurants, but takes general FDI into consideration. The empirical results show that the growth of inbound tourism can not only promote FDI flow into the tourism industries, but also increase the inflows of FDI to other sectors. In other words, the flourished inbound tourism may have s

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

No Dose-Response Effect of Carbohydrate Mouth Rinse Concentration on 5-km Running Performance in Recreational Athletes

Neil D. Clarke, James R. Thomas, Marion Kagka et al. · 2016 · The Journal of Strength and Conditioning Research

Clarke, ND, Thomas, JR, Kagka, M, Ramsbottom, R, and Delextrat, A. No dose-response effect of carbohydrate mouth rinse concentration on 5-km running performance in recreational athletes. J Strength Cond Res 31(3): 715-720, 2017-Oral…

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Negative / Null Result ReportOpen accessMedicine

Association of maternal pre-pregnancy BMI and breastfeeding with NAFLD in young adults: a parental negative control study

Kushala Abeysekera, James Orr, Paul Madley‐Dowd et al. · 2021 · The Lancet Regional Health - Europe

BACKGROUND: The importance of the maternal-infant dyad in the genesis of nonalcoholic fatty liver disease (NAFLD) is of increasing interest. The Avon Longitudinal Study of Parents and Children (ALSPAC) showed that at age 24, 1 in 5 had…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Analysis of Copy Number Variants on Chromosome 21 in Down Syndrome-Associated Congenital Heart Defects

Benjamin L. Rambo‐Martin, Jennifer G. Mulle, David J. Cutler et al. · 2017 · G3 Genes Genomes Genetics

One in five people with Down syndrome (DS) are born with an atrioventricular septal defect (AVSD), an incidence 2000 times higher than in the euploid population. The genetic loci that contribute to this risk are poorly understood. In this study, we tested two hypotheses: (1) individuals with DS carrying chromosome 21 copy number variants (CNVs) that interrupt exons may be protected from AVSD, because these CNVs return AVSD susceptibility loci back to disomy, and (2) individuals with DS carrying chromosome 21 genes spanned by microduplications are at greater risk for AVSD because these microdup

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Candidate gene studies and the quest for the entrepreneurial gene

Matthijs J. H. M. van der Loos, Philipp Koellinger, Patrick J. F. Groenen et al. · 2011 · Small Business Economics

Candidate gene studies of human behavior are gaining interest in economics and entrepreneurship research. Performing and interpreting these studies is not straightforward because the selection of candidates influences the interpretation of…

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Negative / Null Result ReportOpen accessNeuroscience

No effect on condemnation of short or long exposure to eye images

Adam Maxwell Sparks, Pat Barclay · 2015 · Letters on Evolutionary Behavioral Science

The effect of exposure to eye images on various behaviors has been explained as a response to an invalid cue of observation. This interpretation has been supported by an experiment showing that a short exposure to eye images increased…

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Negative / Null Result ReportOpen accessPhysics and Astronomy

Finding Statistically Significant Communities in Networks with Weighted Label Propagation

Wei Hu · 2013 · Social Networking

Various networks exist in the world today including biological, social, information, and communication networks with the Internet as the largest network of all. One salient structural feature of these networks is the formation of groups or communities of vertices that tend to be more connected to each other within the same group than to those outside. Therefore, the detection of these communities is a topic of great interest and importance in many applications and different algorithms including label propagation have been developed for such purpose. Speaker-listener label propagation algorithm

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Negative / Null Result ReportOpen accessMaterials Science

Mycobacterium tuberculosis Rv3406 Is a Type II Alkyl Sulfatase Capable of Sulfate Scavenging

Kimberly M. Sogi, Zev J. Gartner, Mark A. Breidenbach et al. · 2013 · PLoS ONE

The genome of Mycobacterium tuberculosis (Mtb) encodes nine putative sulfatases, none of which have a known function or substrate. Here, we characterize Mtb's single putative type II sulfatase, Rv3406, as a non-heme iron (II) and α-ketoglutarate-dependent dioxygenase that catalyzes the oxidation and subsequent cleavage of alkyl sulfate esters. Rv3406 was identified based on its homology to the alkyl sulfatase AtsK from Pseudomonas putida. Using an in vitro biochemical assay, we confirmed that Rv3406 is a sulfatase with a preference for alkyl sulfate substrates similar to those processed by Ats

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Negative / Null Result ReportOpen accessImmunology and Microbiology

APOBEC3G and APOBEC3F Act in Concert To Extinguish HIV-1 Replication

John F. Krisko, Nurjahan Begum, Caroline E. Baker et al. · 2016 · Journal of Virology

UNLABELLED: The multifunctional HIV-1 accessory protein Vif counters the antiviral activities of APOBEC3G (A3G) and APOBEC3F (A3F), and some Vifs counter stable alleles of APOBEC3H (A3H). Studies in humanized mice have shown that HIV-1…

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Negative / Null Result ReportPsychology

Affect labelling increases the intensity of positive emotions

Valeriia V. Vlasenko, Emma G. Rogers, Christian E. Waugh · 2021 · Cognition & Emotion

Although affect labelling has been widely reported to decrease negative emotions, it is less clear whether affect labelling also decreases positive emotions. In four studies, we explored how affect labelling (choosing the emotion that best…

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Negative / Null Result ReportOpen accessMedicine

Neural protein gamma-synuclein interacting with androgen receptor promotes human prostate cancer progression

Junyi Chen, Jiao Li, Chuanliang Xu et al. · 2012 · BMC Cancer

BACKGROUND: Gamma-synuclein (SNCG) has previously been demonstrated to be significantly correlated with metastatic malignancies; however, in-depth investigation of SNCG in prostate cancer is still lacking. In the present study, we evaluated the role of SNCG in prostate cancer progression and explored the underlying mechanisms. METHODS: First, alteration of SNCG expression in LNCaP cell line to test the ability of SNCG on cellular properties in vitro and vivo whenever exposing with androgen or not. Subsequently, the Dual-luciferase reporter assays were performed to evaluate whether the role of

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Negative / Null Result ReportOpen accessMedicine

DOES HIPEC IMPROVE OUTCOMES IN GASTRIC CANCER PATIENTS TREATED WITH PERIOPERATIVE CHEMOTHERAPY AND RADICAL SURGERY? A PROPENSITY-SCORE MATCHED ANALYSIS

Thiago Pereira Diniz, Wilson Luiz da Costa, Victor Hugo Fonseca de Jesus et al. · 2019 · Journal of Surgical Oncology

BACKGROUND: Hyperthermic intraperitoneal chemotherapy (HIPEC) has been associated with improved survival when compared with surgery alone for non-metastatic gastric cancer patients in randomized trials and meta-analyses. However, little evidence is available regarding the use of HIPEC in nonmetastatic patients who are treated with perioperative chemotherapy and radical surgery. The aim of this study was to investigate the putative survival benefit of HIPEC in the subgroup of gastric cancer patients treated with perioperative chemotherapy and surgery. PATIENTS AND METHODS: This was a retrospect

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Negative / Null Result Report

Dexmedetomidine did not reduce the effects of tourniquet‐induced ischemia‐reperfusion injury during general anesthesia

Evrim Bostankolu, Hilal Ayoglu, Serhan Yurtlu et al. · 2012 · The Kaohsiung Journal of Medical Sciences

Abstract Ischemia reperfusion injury causes the release of free oxygen radicals. Free oxygen radicals initiate the production of toxic metabolites, such as malondialdehyde (MDA), through the lipid peroxidation of cellular membranes.…

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Negative / Null Result ReportOpen accessImmunology and Microbiology

Impact of a mobile decision support tool on antimicrobial stewardship indicators in St. John’s, Canada

Daniel Doyle, Gerald McDonald, Claire Pratt et al. · 2021 · PLoS ONE

OBJECTIVES: Inappropriate antibiotic use contributes to antimicrobial resistance. The SpectrumTM app provides antibiotic decision support, based on local antimicrobial resistance rates. We determined the impact of regional implementation of the app on inpatient antimicrobial appropriateness, inpatient antimicrobial usage (AMU), population-based Clostridioides difficile infection (CDI) rates and cost, using a retrospective, before and after quasi-experimental design, including a one-year study period. METHODS: The SpectrumTM app was released to prescribers in February, 2019. We performed two on

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Negative / Null Result ReportOpen accessMedicine

Machine learning prediction model of acute kidney injury after percutaneous coronary intervention

Toshiki Kuno, Takahisa Mikami, Yuki Sahashi et al. · 2022 · Scientific Reports

Acute kidney injury (AKI) after percutaneous coronary intervention (PCI) is associated with a significant risk of morbidity and mortality. The traditional risk model provided by the National Cardiovascular Data Registry (NCDR) is useful for predicting the preprocedural risk of AKI, although the scoring system requires a number of clinical contents. We sought to examine whether machine learning (ML) techniques could predict AKI with fewer NCDR-AKI risk model variables within a comparable PCI database in Japan. We evaluated 19,222 consecutive patients undergoing PCI between 2008 and 2019 in a Ja

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Negative / Null Result ReportOpen accessMedicine

Treatment of 4T1 Metastatic Breast Cancer with Combined Hypofractionated Irradiation and Autologous T-Cell Infusion

Alexander Filatenkov, Jeanette Baker, Antonia Müller et al. · 2014 · Radiation Research

The goal of this study was to determine whether a combination of local tumor irradiation and autologous T-cell transplantation can effectively treat metastatic 4T1 breast cancer in mice. BALB/c mice were injected subcutaneously with…

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