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20,201 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 accessImmunology and Microbiology

Hemodiafiltration Decreases Serum Levels of Inflammatory Mediators in Severe Leptospirosis: A Prospective Study

Sergio Cleto, Camila Eleutério Rodrigues, Ceila María Sant’Ana Malaque et al. · 2016 · PLoS ONE

BACKGROUND: Leptospirosis is a health problem worldwide. Its most severe form is a classic model of sepsis, provoking acute respiratory distress syndrome (ARDS) and acute kidney injury (AKI), with associated mortality that remains unacceptably high. We previously demonstrated that early initiation of sustained low-efficiency dialysis (SLED) followed by daily SLED significantly decreases mortality. However, the mode of clearance can also affect dialysis patient outcomes. Therefore, the objective of this study was to compare the effects of SLED with traditional (diffusive) clearance, via hemodia

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Negative / Null Result ReportOpen accessMedicine

Cost–Utility Analysis of Deferiprone for the Treatment of β-Thalassaemia Patients with Chronic Iron Overload: A UK Perspective

Anthony Bentley, Samantha Gillard, Michael Spino et al. · 2013 · PharmacoEconomics

BACKGROUND: Patients with β-thalassaemia major experience chronic iron overload due to regular blood transfusions. Chronic iron overload can be treated using iron-chelating therapies such as desferrioxamine (DFO), deferiprone (DFP) and…

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Negative / Null Result ReportOpen accessMedicine

Dose-escalated intensity-modulated radiotherapy and irradiation of subventricular zones in relation to tumor control outcomes of patients with glioblastoma multiforme

Melvin L.K. Chua, Grace Kusumawidjaja, Patricia Gan et al. · 2016 · OncoTargets and Therapy

BACKGROUND: Glioblastoma multiforme (GBM) is the most aggressive primary brain tumor with high relapse rate. In this study, we aimed to determine if dose-escalated (DE) radiotherapy improved tumor control and survival in GBM patients.…

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Negative / Null Result Report

Assessment and Comparison of the Overall Analytical Potential of Capillary Electrophoresis and High-Performance Liquid Chromatography Using the RGB Model: How Much Can We Find Out?

Paweł Mateusz Nowak, Edyta Sekuła, Paweł Kościelniak · 2020 · Chromatographia

Abstract The choice between capillary electrophoresis (CE) and high-performance liquid chromatography (HPLC) is not easy and depends on many factors. An attempt to facilitate this choice is this work, in which both techniques have been…

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Negative / Null Result ReportOpen accessMedicine

Pharmacologic thromboprophylaxis in adult patients undergoing neurosurgical interventions for preventing venous thromboembolism

Juan José Yepes-Núñez, Anita Rajasekhar, Maryam Rahman et al. · 2020 · Blood Advances

The impact of pharmacologic prophylaxis for venous thromboembolism in patients undergoing neurosurgical intervention remains uncertain. We reviewed the efficacy and safety of pharmacologic compared with nonpharmacologic thromboprophylaxis…

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Negative / Null Result ReportOpen accessMedicine

Mortality in HIV and tuberculosis patients following implementation of integrated HIV-TB treatment: Results from an open-label cluster-randomized trial

Kogieleum Naidoo, Santhanalakshmi Gengiah, Nonhlanhla Yende‐Zuma et al. · 2022 · EClinicalMedicine

Background HIV-TB treatment integration reduces mortality. Operational implementation of integrated services is challenging. This study assessed the impact of quality improvement (QI) for HIV-TB integration on mortality within primary…

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Negative / Null Result Report

The dog that failed to bark

Tom Burns · 2010 · The Psychiatrist

Summary UK mental healh services have been distinguished by their continuity of care but recently there has been a move to separating consultant responsibility for in-patient and out-patient care. Local examples of the success of this…

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Negative / Null Result ReportOpen accessMedicine

The Error of Estimated GFR in Type 2 Diabetes Mellitus

Sergio Luis‐Lima, Tomás H. Higuera Linares, Laura Henríquez-Gómez et al. · 2019 · Journal of Clinical Medicine

Type 2 diabetes mellitus represents 30-50% of the cases of end stage renal disease worldwide. Thus, a correct evaluation of renal function in patients with diabetes is crucial to prevent or ameliorate diabetes-associated kidney disease. The reliability of formulas to estimate renal function is still unclear, in particular, those new equations based on cystatin-C or the combination of creatinine and cystatin-C. We aimed to assess the error of the available formulas to estimate glomerular filtration rate in diabetic patients. We evaluated the error of creatinine and/or cystatin-C based formulas

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Negative / Null Result ReportDentistry

Toothpastes containing abrasive and chemical whitening agents: efficacy in reducing extrinsic dental staining.

Cristina Neves Girao Salgado Soares, Flávia Lucisano Botelho do Amaral, Marcelo Ferraz Mesquita et al. · 2017 · PubMed

This in vitro study evaluated the efficacy of toothpastes containing abrasive and chemical whitening agents in reducing the extrinsic discoloration of dental enamel. Sixty slabs of dentin from human teeth were sealed so that only the…

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Negative / Null Result ReportOpen accessMedicine

Improving PCASL at ultra‐high field using a VERSE‐guided parallel transmission strategy

Yan Tong, Peter Jezzard, Thomas W. Okell et al. · 2020 · Magnetic Resonance in Medicine

PURPOSE: To improve the labeling efficiency of pseudo-continuous arterial spin labeling (PCASL) at 7T using parallel transmission (pTx). METHODS: maps were acquired in the labeling plane for tagging pulse design. Complex weights of the labeling pulses for each of the 8 transmit channels were calculated to produce a homogenous radiofrequency (RF) -shimmed labeling across the ROIs. Variable-Rate Selective Excitation (VERSE) pulses were also implemented as a part of the labeling pulse train. Whole-brain perfusion-weighted images were acquired under conditions of RF shimming, VERSE with RF shimmin

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Negative / Null Result Report

Biomechanical Comparison of 3 Medial Patellofemoral Complex Reconstruction Techniques Shows Medial Overconstraint but No Significant Difference in Patella Lateralization and Contact Pressure

Falko Dahm, Hassan Syed, Sebastian Tomescu et al. · 2022 · Arthroscopy

Purpose The purpose of this study was to investigate biomechanical differences of medial patellofemoral ligament (MPFL) reconstruction, medial quadriceps tendon femoral ligament (MQTFL) reconstruction, and a combination of these techniques…

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Negative / Null Result ReportOpen accessDentistry

Antiseptics and microcosm biofilm formation on titanium surfaces

Georgia Verardi, Maximiliano Sérgio Cenci, Tamires Timm Maske et al. · 2016 · Brazilian Oral Research

Oral rehabilitation with osseointegrated implants is a way to restore esthetics and masticatory function in edentulous patients, but bacterial colonization around the implants may lead to mucositis or peri-implantitis and consequent implant loss. Peri-implantitis is the main complication of oral rehabilitation with dental implants and, therefore, it is necessary to take into account the potential effects of antiseptics such as chlorhexidine (CHX), chloramine T (CHT), triclosan (TRI), and essential oils (EO) on bacterial adhesion and on biofilm formation. To assess the action of these substance

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Significant association between renal function and amyloid-positive area in renal biopsy specimens in AL amyloidosis

Takeshi Kuroda, Naohito Tanabe, Daisuke Kobayashi et al. · 2012 · BMC Nephrology

BACKGROUND: The kidney is a major target organ for systemic amyloidosis that often affects the kidney including proteinura, and elevated serum creatinine (Cr). The correlation between amount of amyloid deposits and clinical parameters is not known. The aim of this study was to clarify correlation the amyloid area in all renal biopsy specimen and clinical parameters. METHODS: Fifty-eight patients with an established diagnosis of AL amyloidosis participated in the study. All patients showed amyloid deposits in renal biopsies. We retrospectively investigated the correlation between clinical data

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Negative / Null Result Report

Climate change and pro-environmental behaviours: the significant environmental challenges of livelihoods

Nadia A. Abdelmegeed Abdelwahed, Bahadur Ali Soomro, Naimatullah Shah · 2022 · Management of Environmental Quality: An International Journal

Purpose The study investigates the intention to adopt climate change and the pro-environmental behaviours among the residents of a developing country (Pakistan) through the theory of planned behaviour (TPB). Design/methodology/approach…

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Negative / Null Result Report

Exercise Strain Echocardiography in Patients With a Hemodynamically Significant Myocardial Bridge Assessed by Physiological Study

Yukari Kobayashi, Jennifer A. Tremmel, Yuhei Kobayashi et al. · 2015 · Journal of the American Heart Association

Background Although a myocardial bridge ( MB ) is often regarded as a benign coronary variant, recent studies have associated MB with focal myocardial ischemia. The physiological consequences of MB on ventricular function during stress…

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Negative / Null Result ReportOpen accessMedicine

Little evidence for an effect of the rubber hand illusion on basic movement

Arran T. Reader, Victoria S. Trifonova, H. Henrik Ehrsson · 2021 · European Journal of Neuroscience

Body ownership refers to the distinct sensation that our observed body belongs to us, which is believed to stem from multisensory integration. This is commonly shown through the rubber hand illusion (RHI), which induces a sense of ownership over a false limb. Whilst the RHI may interfere with object-directed action and alter motor cortical activity, it is not yet clear whether a sense of ownership over an artificial hand has functional consequences for movement production per se. As such, we performed two motion-tracking experiments (n = 117) to examine the effects of the RHI on the reaction t

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Negative / Null Result ReportOpen accessMedicine

Enhanced cardiac repair by telomerase reverse transcriptase over-expression in human cardiac mesenchymal stromal cells

Thi Yen Loan Le, Hilda A. Pickett, Andrian Yang et al. · 2019 · Scientific Reports

We have previously reported a subpopulation of mesenchymal stromal cells (MSCs) within the platelet-derived growth factor receptor-alpha (PDGFRα)/CD90 co-expressing cardiac interstitial and adventitial cell fraction. Here we further characterise PDGFRα/CD90-expressing cardiac MSCs (PDGFRα + cMSCs) and use human telomerase reverse transcriptase (hTERT) over-expression to increase cMSCs ability to repair the heart after induced myocardial infarction. hTERT over-expression in PDGFRα + cardiac MSCs (hTERT + PDGFRα + cMSCs) modulates cell differentiation, proliferation, survival and angiogenesis re

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Negative / Null Result ReportOpen accessNeuroscience

Anodal tDCS and High-Frequency tRNS Targeting the Occipitotemporal Cortex Do Not Always Enhance Face Perception

Megan Willis, Andrea I. Costantino, Michael A. Nitsche et al. · 2019 · Frontiers in Neuroscience

There has been increasing interest in the utility of transcranial electrical stimulation as a tool to enhance cognitive abilities. In the domain of face perception, enhancements have been reported for both transcranial direct current stimulation (tDCS) and high-frequency transcranial random noise stimulation (tRNS) targeting the occipitotemporal cortex. In a series of two experiments, we attempted to replicate these findings for face identity perception, and extend on previous studies, to determine if similar enhancements are also observed for object and facial expression perception. In Experi

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Negative / Null Result ReportOpen accessAgricultural and Biological Sciences

Modified cyclodextrin type and dehydration methods exert a significant effect on the antimicrobial activity of encapsulated carvacrol and thymol

Santiago López‐Miranda, Daniel Berdejo, Elisa Pagán et al. · 2020 · Journal of the Science of Food and Agriculture

Abstract BACKGROUND The antimicrobial activity of essential oils and their constituents has led to increasing interest in using them as natural preservative agents. However, their high sensitivity to light and oxygen, their volatility and…

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Negative / Null Result ReportOpen accessSocial Sciences

Migration, Remittances and Entrepreneurship: The Case of Rural Ecuador

Cristian Vasco · 2013 · Americanae (AECID Library)

Con datos de la “Encuesta de condiciones de vida (ecv) 2005-2006”, este artículo analiza el impacto de la migración internacional y las remesas en la iniciativa emprendedora en el Ecuador rural. Los resultados sugieren que ni la migración…

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Negative / Null Result ReportOpen accessEngineering

Channel Characteristics of Dynamic Off-Body Communications at 60 GHz Under Line-of-Sight (LOS) and Non-LOS Conditions

Seong Ki Yoo, Simon L. Cotton, Young Jin Chun et al. · 2017 · IEEE Antennas and Wireless Propagation Letters

This letter investigates the first-order characteristics of dynamic off-body communications channels at 60 GHz. In particular, we have studied signal propagation from a chest-worn millimeter-wave transmitter as an adult male walked toward and then away from a hypothetical base station. The mobile line-of-sight (LOS) and non-LOS (NLOS) channel measurements have been conducted in a diverse range of environments, including a hallway, an open office, an anechoic chamber, and an outdoor car park. In this study, we have decomposed the received signal into its path loss, large-scale, and small-scale

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Negative / Null Result ReportOpen accessDecision Sciences

Magical thinking in predictions of negative events: Evidence for tempting fate but not for a protection effect

J. van Wolferen, Yoel Inbar, Marcel Zeelenberg · 2013 · Judgment and Decision Making

Abstract In this paper we test two hypotheses regarding magical thinking about the perceived likelihood of future events. The first is that people believe that those who “tempt fate” by failing to take necessary precautions are more likely to suffer negative outcomes. The second is the “protection effect”, where reminding people of precautions they have taken leads them to see related risks as less likely. To this end, we describe the results from three attempted direct replications of a protection effect experiment reported in Tykocinski (2008) and two replications of a tempting fate experime

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Negative / Null Result ReportOpen accessNeuroscience

Null results in bilingualism research

Ellen Bialystok · 2020 · Journal of Multilingual Theories and Practices

The controversy over whether bilingualism has consequences for mind and brain shows no sign of abating. A steady stream of research reporting both positive results supporting the claim for beneficial effects of bilingualism and null…

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Negative / Null Result ReportPsychology

Small-Group, Emergent Literacy Intervention Under Two Implementation Models: Intent-to-Treat and Dosage Effects for Preschoolers at Risk for Reading Difficulties

Shayne B. Piasta, Jessica A. R. Logan, Cynthia M. Zettler‐Greeley et al. · 2022 · Journal of Learning Disabilities

Preschool-age children identified as at risk for later reading difficulties can benefit from supplemental, small-group emergent literacy intervention. As such interventions become commercially available and marketed to preschool programs,…

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