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19,871 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 ReportMedicine

Visual-Spatial Influences on Vocal Intensity: Effects of Speaker-to-Listener Distance and Room Size in Immersive Virtual Reality.

Daşdöğen Ü, Hitchcock J, Ahn S et al. · 2026 · Journal of speech, language, and hearing research : JSLHR

Objectives The aim of this study was to investigate the effects of speaker-to-listener distance versus room size on individuals' voice perception and production using immersive virtual reality (IVR). Method Fifteen vocally healthy…

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Negative / Null Result ReportOpen accessMedicine

Temporal shift in task factor influence across the stretch reflex.

Torell F, Rohlén R, Dimitriou M · 2026 · PloS one

Mechanical perturbations applied to the arm can elicit reflexive actions. These rapid corrective responses include the stretch reflex, which consists of different components: the short-latency reflex (SLR) and the early and late…

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Negative / Null Result ReportOpen accessMedicine

Up to 30 years of clinical performance of double-crown-retained removable dental prostheses with spark-eroded friction pins placed in a general dental practice.

Zierden K, Werdecker S, Wöstmann B et al. · 2026 · Clinical oral investigations

Purpose The purpose of this retrospective cohort study was to investigate the clinical performance and longevity of double-crown-retained removable-dental-prostheses (DCR-RDP) with spark-eroded friction pins inserted in a general dental…

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Negative / Null Result ReportOpen accessMedicine

Effects of maternal dental anxiety on the time of first dental visit and dental caries status of children.

Mohammadpour N, Shirdel M, Hekmatfar S · 2026 · Journal of education and health promotion

Background This study aimed to assess the effects of maternal dental anxiety on the time of first dental visit and dental caries status of children. Materials and methods This cross-sectional study was conducted on 220 children between 3…

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Negative / Null Result ReportMedicine

The effect of the liquid motion bubbler timer soothing sensory toy on children's fear and anxiety levels during blood sampling: a randomized clinical trial.

Sariali̇oğlu A, Oluç T · 2026 · BMC psychology

Background Blood sampling is one of the invasive procedures in a hospital setting that can cause fear, anxiety, and stress in children. Aim The study aimed to determine the effect of the Liquid Motion Bubbler Timer Soothing Sensory Toy on…

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Negative / Null Result ReportOpen accessMedicine

An improved translational approach to studying persistence-strengthening effects of differential reinforcement of alternative behavior.

Layton KL, Edwards TL, Foster TM · 2026 · Journal of the experimental analysis of behavior

Translational research investigating traditional differential reinforcement of alternative behavior (DRA) suggests that such procedures increase the persistence of target behavior relative to when the alternative behavior is first…

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Negative / Null Result ReportOpen accessMedicine

Relationship Between Pulmonary Thromboembolism, its Mortality and Seasonal, Meteorological Factors

Seda Beyhan Sağmen, Sevda Cömert, Nesrin Kıral et al. · 2019 · Southern Clinics of Istanbul Eurasia

INTRODUCTION[|]Seasonal and weather changes may affect the development of pulmonary embolism. The effects of seasonal and meteorological factors on mortality are controversial. We aimed to investigate the effects of seasons and meteorological data on patients with a low and high pulmonary embolism severity index and those with 30-day mortality. [¤]METHODS[|]Pulmonary embolism cases were included in our study. Daily pressure, humidity, temperature, and wind values were taken from the general online information by the Directorate of Meteorology. All cases were divided into the low-risk and high-

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Negative / Null Result ReportOpen accessDiseases of the circulatory (Cardiovascular) system

Renal sympathetic denervation in resistant hypertension: The association between vitamin D and positive early response in systolic blood pressure

Gonçalo Costa, Joana Delgado-Silva, Eric Monteiro et al. · 2022 · Revista Portuguesa de Cardiologia

Aims and objectives: Vitamin D deficiency is a common finding and there is a suggested association with hypertension. Resistant hypertension is a clinical problem observed in 5–30% of hypertensive patients. Renal denervation (RDN) has been used for patients with resistant hypertension and has proven to lower blood pressure. Our primary goal was to assess the vitamin D serum concentration as a predictor of blood pressure response to RDN in highly selected patients. Methods: This prospective, nonrandomized, single-center study included 24 patients treated with RDN. Based on their one-year respon

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Negative / Null Result ReportOpen accessBusiness

Air quality protection behaviour and stock returns of public companies: Sectoral aspects

Maksim S. Maramygin, Natalya B. Boldyreva, Lyudmila G. Reshetnikova · 2025 · Управленец

In the new economic reality, air quality protection behaviour of companies remains a burning issue shifting the em phasis towards saving human life and health. The article explores the relationship between the air quality protection behav iour of public companies and stock returns in different economic sectors. The research methodology is based on environmental management theory, financial management theory, and stakeholder theory. The analytical procedures performed on the data involved cross-sectoral economic analysis and econometric analysis. Empirical data are retrieved from the Federal St

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Negative / Null Result ReportOpen accessMedicine

Low-dose oral pregabalin is not effective enough to control the acute post-thoracotomy pain

Swati Dogra , Altaf Hussain Mir , Suhail Sidiq et al. · 2025 · Asian Journal of Medical Sciences

Background: Acute post-thoracotomy pain (APTP) is severe and can lead to various respiratory complications if left untreated. Epidural (Ep) analgesia is the gold standard for APTP relief. Aims and Objectives: The aims and objectives of this study were to study the impact of low-dose oral pregabalin 75 mg on APTP. Materials and Methods: 100 patients were randomized into two groups (Group P and C). The Group P, study group received pregabalin 75 mg per oral preoperatively and for 2 days postoperatively. Group C received no medication. All the patients received thoracic Ep as a standard practice.

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Negative / Null Result ReportOpen accessDermatology

Comparison of efficacy and safety between intralesional injection of heparin sodium and CO2 laser ablation in the treatment of xanthelasma

JI Liyue, QIU Xiaonan, WANG Xijuan et al. · 2025 · Pifu-xingbing zhenliaoxue zazhi

[Objective] To evaluate the clinical efficacy and safety of intralesional injection of heparin sodium versus carbon dioxide (CO2) laser ablation in the treatment of xanthelasma palpebrarum. [Methods] A total of 38 patients with Grade Ⅰ-Ⅲ xanthelasma and normal blood lipid levels were retrospectively enrolled, and divided into two groups based on the treatment modality: the heparin sodium group (n=20) treated with intralesional injection of heparin sodium and the CO2 laser group (n=18) treated with CO2 laser ablation. The primary and secondary outcomes were compared between the two groups, incl

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Negative / Null Result ReportOpen accessOtorhinolaryngology

Um estudo piloto na avaliação das estratégias posturais em jovens e idosos usando um sistema eletromagnético tridimensional A pilot study on the evaluation of postural strategies in young and elderly subjects using a tridimensional electromagnetic system

José Ailton Oliveira Carneiro, Taiza Elaine Grespan Santos-Pontelli, José Fernando Colafêmina et al. · 2013 · Brazilian Journal of Otorhinolaryngology

Para manter o equilíbrio postural, algumas estratégias posturais são normalmente usadas. OBJETIVO: Avaliar as estratégias posturais de jovens e idosos em diferentes condições sensoriais usando um sistema de sensores eletromagnéticos tridimensionais posicionados na primeira vértebra torácica e região sacral. Também reportamos valores de oscilação postural dos jovens e idosos. MÉTODO: Estudo transversal observacional. Participaram do estudo 25 jovens e 16 idosas. O equipamento PolhemusTM com dois sensores foi usado para avaliar os parâmetros de oscilação postural (deslocamento máximo, velocidade

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

ASSOCIATION BETWEEN FAS/FASL EXPRESSION AND RHEUMATOLOGICAL MANIFESTATIONS IN PATIENTS INFECTED WITH HTLV-1

Aline Cecy Rocha de Lima, Wandrey Roberto dos Santos Brito, Luciana Cristina Coelho Pantoja Santos et al. · 2026 · Brazilian Journal of Infectious Diseases

Introduction: Fas and FasL are known modulators of cellular apoptosis in immunoregulation of the innate immune response, as well as in the elimination of defective cells, and may be associated with antiviral activity of HTLV-1 – infected cells. Understanding the immunological mechanisms involved in the progression of HTLV-1 – associated diseases may contribute to predicting the clinical prognosis of infected individuals. Objective: To evaluate mRNA expression of the apoptotic modulators FAS and FASL in patients infected with HTLV-1. Methods: A total of 54 HTLV-1 – infected individuals were eva

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Negative / Null Result ReportOpen accessTechnology

Influence of the Process Parameters on the Mechanical Properties of the FDM 3D Printed Samples

Sara Havrlišan, Martina Tokić, Štefanija Klarić et al. · 2026 · Tehnički Glasnik

This research analyses the impact of infill density and layer thickness on the tensile strength of test samples fabricated using FDM 3D printing, with a particular focus on comparing samples produced with and without an adhesion layer. A two-factor factorial experimental design was employed, consisting of two levels and three replications. The infill density (20% and 50%) and layer thickness (0.1 mm and 0.2 mm) were defined as input variables, while tensile strength served as the output variable. Statistical methods, such as ANOVA, were used to analyse the experimental data and evaluate the si

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