A searchable index of real negative results, null findings, and replication failures from the published literature — so you can learn what didn't work before repeating it.
WASTE indexes published research — it does not host or republish full papers. Each entry is a metadata record (title, authors, DOI) compiled from open scholarly databases, with the abstract shown in full only where the paper is openly licensed (e.g. Creative Commons); otherwise a short excerpt is shown for reference under fair use. WASTE classifies each work by failure type; classifications are automated and approximate.
20227 results in Negative / Null Result Report · page 189 of 675
Yang J, Zhu D, Liu R et al. · 2026 · Bioresource technology
Partial nitritation (PN) underpins two-stage anaerobic ammonium oxidation-based nitrogen removal, but biomass management in sidestream PN reactors remains largely empirical. This study tested three PN sequencing batch reactors maintained…
Ashraf A, Shamel M, Massieh C et al. · 2026 · BMC oral health
Background Energy drinks are acidic beverages with recognized erosive potential, but their effect on enamel characteristics relevant to orthodontic bonding remains incompletely described. This in vitro study evaluated the effect of…
Mata M, Harmand MG, Prada-Arrondo PC et al. · 2026 · Preprint
Objective Older adults undergoing cardiac surgery may be vulnerable to postoperative cognitive decline. However, no studies have examined postoperative cognitive outcomes in older patients with cardiovascular disease (CVD) according to…
Ganji SK, Talari K, Maloth RK et al. · 2026 · Rapid communications in mass spectrometry : RCM
Rationale Nitrite anion is among the highly reactive anions and converts the secondary amines to their corresponding carcinogenic N-nitroso metabolites in the human body. Nitrite ion is highly abundant in natural waters and enters the body…
Niu J, Huang W, Zou J · 2026 · Clinical neurology and neurosurgery
Purpose To compare rupture-related signals captured by automatically extracted computed tomography angiography (CTA) morphologic features and threshold-based computed tomography perfusion (CTP) metrics in large unruptured intracranial…
Sezen E, Kurtulmus H · 2026 · Preprint
Abstract Background To compare the time-dependent retentive-force behavior and wear-related surface alterations of two unsplinted overdenture attachment systems, a ball attachment system and a TRI Raptor Smart Box system, after…
De la Hoz JF, Lee YH, Tubbs JD et al. · 2026 · Preprint
Importance Individuals with psychiatric disorders face elevated cardiometabolic risk which is linked to increased mortality. The extent to which this reflects shared pathogenesis or the downstream effects of illness and treatment remains…
Vencato AA, Juchem ALM, Clerici NJ et al. · 2026 · International journal of biological macromolecules
This study produced six formulations using polyvinyl alcohol (PVA) blended with gelatin or gelatin-starch, incorporating cinnamon powder (CP) or cinnamon essential oil (CEO). Homogeneous nanofibers with diameters ranging from 367 to 532 nm…
Park KW, Kim HY, Kim KA et al. · 2026 · European journal of orthodontics
Objective We aimed to evaluate three-dimensional (3D) maxillary displacement and secondary mandibular changes following miniscrew-assisted rapid palatal expansion (MARPE) according to pretreatment skeletal subtypes, based on the…
Tamini S, Bondesan A, Caroli D et al. · 2026 · Metabolites
Background/Objectives : Pediatric obesity is closely associated with metabolic syndrome (MetS), a condition linked to increased cardiometabolic risk. Early identification of high-risk individuals remains challenging. This study aimed to…
Ebou AET, Amani BH, Toure GT et al. · 2026 · Preprint
Secondary forest succession following agricultural abandonment is a dominant land-use transition across the tropics, yet whether soil microbial communities recover toward old-growth forest reference states remains poorly understood,…
Li J, Song Z, Wang G et al. · 2026 · Frontiers in cell and developmental biology
Background Dilated cardiomyopathy (DCM) is the most common non-ischemic cardiomyopathy and a major cause of heart failure, but disease-specific molecular biomarkers remain limited. This study aimed to identify and prioritize tissue-level,…
An MH, Kim C, Min K et al. · 2026 · Discover oncology
Background The ProtecT randomized trial found similar survival between active surveillance (AS), radiotherapy (RT), and radical prostatectomy (PT) in localized prostate cancer (PC), but observational studies yielded conflicting results.…
li j, Chen Y, Chen Y et al. · 2026 · Preprint
Abstract Objective To investigate the association between perioperative hypothermia and postoperative muscular calf vein thrombosis (MCVT) in patients undergoing total knee arthroplasty (TKA), and to evaluate the predictive performance of…
Doğan D, Öksüz C, Çakır Ö et al. · 2026 · Biomedicines
Background/Objectives: Differentiating mediastinal lymphadenopathy associated with lung cancer from sarcoidosis remains a clinical challenge because of overlapping imaging findings. This study evaluated whether CT-derived radiomic…
Xie B, Rui Y · 2026 · Plants (Basel, Switzerland)
Nanotechnology has attracted increasing attention in agricultural and environmental research, but the biological effects and potential risks of nanoparticles based on non-essential elements remain insufficiently understood. This study…
Potdar A, Kumari A · 2026 · Preprint
Abstract Solar radio bursts in the metric and decametric ranges are direct signatures of accelerated electrons in the solar atmosphere. It is almost always the case that these bursts are associated with solar flares. In the present study,…
Destro JM, Reis BO, Chrisostomo DA et al. · 2026 · Journal of functional biomaterials
This study aimed to evaluate the effects of experimental bioactive glass solutions on dentinal fluid flow and hydraulic conductance in vitro. Dentin blocks of 50 bovine incisors were divided into 5 groups according to the desensitizing…
Xu Z, Su S, Xu Z et al. · 2026 · Frontiers in psychology
The Drive for Muscularity Attitudes Questionnaire (DMAQ) is a brief tool for assessing muscularity-related attitudes. This study translated the DMAQ into Chinese and evaluated its reliability and validity separately in males and females. A…
Koyuncu Z, Evcil FY, Kilimci ÖS et al. · 2026 · BMC psychiatry
Objective This study investigated whether current comorbid psychiatric symptoms were involved in statistical indirect associations between childhood attention-deficit/hyperactivity disorder (ADHD) symptoms (CAS) and functional impairment…
Hirano K, Seki T, Watanabe A et al. · 2026 · Preprint
Background Initiation of emergency dialysis, often requiring temporary catheter owing to unprepared definitive vascular access, is associated with infectious and vascular complications and suggests advanced chronic kidney disease (CKD)…
Gessler KB, Rescaroli J, Pires SM et al. · 2026 · Neurotoxicity research
Atorvastatin is a widely prescribed statin used for its cholesterol-lowering effects; however, it also exerts known pleiotropic effects, including antioxidant and anti-inflammatory properties. Atorvastatin´s impact on mitochondrial…
Pan Y, Sun Y, Shi C et al. · 2026 · Preprint
Abstract Genetic testing guides personalized management of differentiated thyroid carcinoma (DTC). However, tumor heterogeneity, including spatial and temporal heterogeneity, has created an unresolved clinical problem. It remains unclear…
Tuo Y, Yang S, Dai X et al. · 2026 · Journal of ethnopharmacology
Ethnopharmacological relevance Syringa oblata Lindl. emits a variety of biogenic volatile organic compounds (BVOCs) during full bloom, which forms the key chemical basis for its characteristic floral scent. Species of the genus Syringa…
Zhen B, Yang X, Yao B · 2026 · Scandinavian journal of psychology
Child abuse has been significantly associated with children's mobile phone dependence (MPD), particularly in left-behind children (LBC). However, whether distinct forms of child abuse (physical and emotional) are associated with MPD in LBC…
Idawati, I. (Idawati), Wahyudi, W. (Wahyudi), Endang, B. (Busri) · 2016
In this research method used is quantitative method, the type of comparative studies, to compare existing organizational culture in school achievement. Data used primary data. The results showed that (1) There is no significant difference…
Huaizhou You (414624), Chuanming Hao (124404), Ying Zhou (25031) et al. · 2013
(a1) Failure plots for probability of survival at 90 days between high and low 25-hydroxyvitamin D level subgroups. No significant difference between the two subgroups was found (log rank, p = 0.554). (b1) Failure plots for probability of…
Partoazar A, Shahabi S, Afrasiabi S · 2026 · BMC oral health
Background Biofilms contribute to the dental calculus formation, which in turn deteriorates oral and systemic health. The use of antimicrobial photodynamic therapy (PDT) may be limited by problems with photosensitizer penetration. In…
Lipa AJ, Janata-Schwatczek K, Sterz M et al. · 2026 · Seminars in thrombosis and hemostasis
Pulmonary embolism (PE) in octogenarians (i.e., patients > 80 years) is associated with substantial morbidity and mortality, yet this population remains underrepresented in major studies. We compared the predictive performance of the…
Chen W, Ge X, Hu C et al. · 2026 · Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology
Prospective studies are necessary to determine the association between circulating proteins and colorectal cancer (CRC) risk, offering non-invasive biomarkers for early CRC risk prediction and interventions. The Olink Explore-3072 platform…