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19,843 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

Quantification of retinal non-perfusion in eyes with diabetic retinopathy to study the association with retinal neovascularisation: INSPIRED study report 3.

Khalid H, Tsai WS, Lamanna F et al. · 2026 · The British journal of ophthalmology

Background/aims To characterise the distribution of retinal non-perfusion and its relationship with neovascularisation elsewhere (NVE) and visual acuity (VA) in referable diabetic retinopathy (DR) using ultra-widefield fluorescein…

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Negative / Null Result ReportMedicine

Measuring Cognitive Flexibility in Chinese Individuals with Obsessive-Compulsive Disorder: Psychometric Validation and Factor Structure of the Chinese Version of the Flexibility in Daily Life Scale.

Yan Z, Chen T, Ma X et al. · 2026 · Psychology research and behavior management

Purpose Impaired cognitive flexibility is a core feature of obsessive-compulsive disorder (OCD) and may contribute to symptom persistence and variabe therapeutic outcomes. However, traditional measures may adequately capture how cognitive…

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Negative / Null Result ReportMedicine

Predictable modality transitions and meaningful stimuli facilitate sequential statistical learning between sensory modalities.

Pérez-Bellido A, Duato D, Giannelli F et al. · 2026 · Journal of experimental psychology. Learning, memory, and cognition

Statistical learning is the process of extracting regularities from the environment. Although sequential cross-modal regularities are ubiquitous (e.g., the sight of a falling ball followed by the sound of impact), previous research has…

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Negative / Null Result ReportMedicine

Between hope and uncertainty: the elusive evidence on hyperbaric oxygen therapy and radiotherapy.

Cuccia F, Cracchiolo AN, Piras A et al. · 2026 · Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer

Background Radiotherapy (RT) is a cornerstone in cancer management, but late radiation tissue injury (LRTI) remains a relevant clinical issue, affecting approximately 5% of patients and significantly impacting quality of life. Hyperbaric…

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Negative / Null Result ReportMedicine

A Review of Trials for Unsuccessful Pediatric Drug Development Programs Submitted to the US Food and Drug Administration 2015-2022.

Samuels S, Seaton M, Abdel-Rahman SM et al. · 2026 · Therapeutic innovation & regulatory science

Background Legislative initiatives have spurred an increase in pediatric drug development programs. However, some drug products studied in the pediatric population have not received an approved pediatric indication, and efforts have been…

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Negative / Null Result ReportOpen accessMedicine

Computer-navigated versus conventional total knee arthroplasty: no difference in implant survival at 15-year follow-up.

Longo G, Pacchiarotti G, Pizzigallo C et al. · 2026 · Journal of orthopaedic surgery and research

Introduction The introduction of computer-assisted navigation (CAS) in total knee arthroplasty (TKA) aimed to improve prosthetic alignment and potentially enhance long-term implant survival. However, the actual clinical benefit beyond 10…

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Negative / Null Result ReportMedicine

Assessment of intraoperative high frequency variability index as a predictor of postoperative pain after open liver or pancreatic surgery under combined general and epidural anesthesia: a prospective observational study.

Yoshida K, Hakozaki T, Hasegawa T et al. · 2025 · Journal of clinical monitoring and computing

The aim of the present study was to investigate the utility of the intraoperative high frequency variability index (HFVI) / Analgesia Nociception Index (ANI) for predicting postoperative pain in patients undergoing open liver or pancreatic…

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Negative / Null Result ReportOpen accessMedicine

Most autophagic cell death studies lack evidence of causality.

Özkaya AB, Ghaseminejad Y · 2025 · FEBS open bio

Autophagy plays a critical role in maintaining cellular homeostasis and is implicated in various physiological and pathological processes, including cancer, neurodegeneration, and metabolic disorders. Although typically associated with…

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Negative / Null Result ReportOpen accessMedicine

Overall survival following treatment of central nervous system meningeal melanocytomas: Insights from the national cancer database (NCDB).

El-Hajj VG, El Choueiri J, Vasella F et al. · 2026 · Brain & spine

Introduction Central nervous system (CNS) melanocytomas are rare, pigmented tumors derived from leptomeningeal melanocytes. Although generally benign, they can exhibit locally aggressive behavior and recur. Despite increasing recognition,…

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Negative / Null Result ReportOpen accessMedicine

Impact of an Anti-infection Double Lumen Bundle on the incidence of central venous catheter-related infections in haematological patients: a retrospective cohort study.

Lazarevic Lindblad M, Pålsson E, Lazarevic V et al. · 2026 · Infection prevention in practice

Background Central venous catheters (CVCs) are commonly used in patients with haematological diseases but are associated with infectious complications. The CVC Anti-infection Double Lumen Bundle was introduced in December 2020 to reduce…

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Negative / Null Result ReportOpen accessMedicine

Efficacy and Safety of Pregabalin for Restless Legs Syndrome in Korean Adults: A Randomized, Double-Blind, Placebo-Controlled Trial.

Sunwoo JS, Cho YW, Shin WC et al. · 2025 · Journal of clinical neurology (Seoul, Korea)

Background and purpose To evaluate the clinical efficacy and safety of pregabalin in Korean adults with restless legs syndrome (RLS). Methods In this randomized, multicenter, double-blind, placebo-controlled trial, 78 patients with RLS…

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Negative / Null Result ReportMedicine

Knowledge, attitude, and practice on clear aligner therapy in mixed dentition among pediatric dentists of India: A cross-sectional survey.

Soral S, Bargale S, Dave B et al. · 2026 · Journal of the Indian Society of Pedodontics and Preventive Dentistry

Background Orthodontic treatment has long been associated with visible wires in the mouth. Clear aligners, once limited to mild crowding/spacing, are now supported for correcting more complex malocclusions. While Clear Aligner Therapy…

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Negative / Null Result ReportMedicine

Real-World Evidence: Cefiderocol Therapeutic Drug Monitoring in Critically Ill, Obese Patients with <i>Klebsiella pneumoniae</i> Infections.

Manca A, Palermiti A, Corcione S et al. · 2026 · Antibiotics (Basel, Switzerland)

Background/Objectives: Cefiderocol (FDC) is a siderophore-containing cephalosporin that retains activity against many β-lactamase-producing bacteria, such as New Delhi metallo-β-latamase-producing (NDM) K. pneumoniae . Its use in…

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Negative / Null Result ReportOpen accessOils, fats, and waxes

制油工艺对油茶籽油生物活性成分含量 和抗氧化活性的影响Effect of oil production process on the biologically active ingredients and antioxidant activity of oil-tea camellia seed oil

刘芳1,吴苏喜1,2,蒋明芳1,谭传波3,李普选2LIU Fang1, WU Suxi1,2, JIANG Mingfang1, TAN Chuanbo3, LI Puxuan2 · 2022 · Zhongguo youzhi

为了了解不同制油工艺对油茶籽油生物活性成分含量和抗氧化活性的影响,以油茶果为原料,采取鲜榨法、浸提法、新水法、冷榨法和热榨法5种制油工艺分别制取油茶籽油,研究对比了5种制油工艺的提油率,所制取的油茶籽油的脂肪酸组成、生物活性成分(生育酚、角鲨烯及多酚)含量及其对DPPH自由基和ABTS自由基的清除能力。结果表明,5种制油工艺的提油率均在73%以上,其中浸提法((96.45±3.02)%)最高,冷榨法((73.72±2.76)%)最低,鲜榨法((82.36±224)%)、新水法((81.91±3.21)%)和热榨法((80.34±2.09)%)没有显著差异;5种工艺所制取的油茶籽油具有相似的脂肪酸组成;在α-生育酚和总生育酚含量方面,新水法制取的油茶籽油含量最高(α-生育酚含量(263.77±1.58)mg/kg,总生育酚含量(280.55±1.64)mg/kg),鲜榨法、冷榨法和热榨法制取的油茶籽油中总生育酚含量接近,在233~244 mg/kg之间,浸提法制取的油茶籽油中总生育酚含量只有(17.10±0.76)mg/kg;在角鲨烯和多酚含量方面,鲜榨法制取的油茶籽油明显高于其他工艺的,分别为(350.56±7.60)mg/kg和(45.04±4.50)mg/kg,新水法制取的油茶籽油角鲨烯含量最低,为(249.99±3.73)mg/kg,浸提法制取的油茶籽油多酚含量最低,为(7

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Negative / Null Result ReportOpen accessBiology (General)

Biochemical evaluation of mutant genotypes of Sesamum indicum for the development of improved varieties

Muhammad Abba Isah Audu, Yusuf Idris, Muhammad Liman Muhammad et al. · 2022 · Botanica

The nutritional attributes of sesame, Sesamum indicum, vary substantially and are primarily influenced by the plant’s genetic makeup. This investigation accessed the biochemical composition of sesame mutants from two generations. Seeds of eleven M3 lines were planted in a Randomized Complete Block Design (RCBD) to raise M4 lines, which were advanced to M5 generation. The seeds were harvested at maturity, and their biochemical compositions were quantitatively determined following standard procedures. Results revealed significant differences (p 0.05) was observed in ash content of M4 and M5 muta

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Negative / Null Result ReportOpen accessNeurosciences. Biological psychiatry. Neuropsychiatry

The Biomechanical Characteristics of Swallowing in Tracheostomized Patients with Aspiration following Acquired Brain Injury: A Cross-Sectional Study

Xiao-Xiao Han, Jia Qiao, Zhan-Ao Meng et al. · 2023 · Brain Sciences

Objectives: Investigate the biomechanical characteristics in tracheostomized patients with aspiration following acquired brain injury (ABI) and further explore the relationship between the biomechanical characteristics and aspiration. Methods: This is a single-center cross-sectional study. The tracheostomized patients with aspiration following ABI and age-matched healthy controls were recruited. The biomechanical characteristics, including velopharynx (VP) maximal pressure, tongue base (TB) maximal pressure, upper esophageal sphincter (UES) residual pressure, UES relaxation duration, and subgl

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Negative / Null Result ReportMedicine

Lumbar degenerative disease: association of serum complement levels with diagnosis, structural severity, and postoperative prognosis.

Deng, Zhu, Cao et al. · 2026 · European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society

The clinical evaluation of lumbar degenerative disease (LDD) severity relies on symptoms and imaging, lacking biologically specific diagnostic markers. This study investigated the role of serum complements in LDD to assess their potential…

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Negative / Null Result ReportOpen accessMedicine

An extended research of crossmodal correspondence between color and sound in psychology and cognitive ergonomics

Xiuwen Sun, Xiaoling Li, Lingyu Ji et al. · 2018 · PeerJ

Based on the existing research on sound symbolism and crossmodal correspondence, this study proposed an extended research on cross-modal correspondence between various sound attributes and color properties in a group of non-synesthetes. In Experiment 1, we assessed the associations between each property of sounds and colors. Twenty sounds with five auditory properties (pitch, roughness, sharpness, tempo and discontinuity), each varied in four levels, were used as the sound stimuli. Forty-nine colors with different hues, saturation and brightness were used to match to those sounds. Result revea

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Negative / Null Result ReportOpen accessAnimal culture

Effect of replacing fish meal with wheat gluten on growth performance, serum biochemistry, liver antioxidant and intestinal digestive enzyme activity of Cyprinus carpio

QIAN Ren-dong, WANG Lian-sheng, LUO Qiao-hua et al. · 2023 · Siliao yanjiu

The purpose of the study was to investigate the effects of wheat gluten replacing fish meal on growth performance, serum biochemistry, liver antioxidant and intestinal digestive enzyme activities of Cyprinus carpio . A total of 180 healthy Cyprinus carpio with an initial body weight of (9.16±0.03) g were selected and divided into three experimental groups, with three replicates in each group and 20 fish in each replicate. The control group (CW) was with 5% fish meal, and the experimental groups were with 50% (WA) and 100% (WB) fish meal replaced by wheat gluten. The experiment lasted for 56 d.

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Negative / Null Result ReportOpen accessAnimal culture

Effect of chilling methods on the surface color and water retention of yellow-feathered chickens

Hang Wang, Xiaojie Qin, Xia Li et al. · 2020 · Poultry Science

This study was conducted to investigate the effects of air chilling (AC), water chilling (WC), combined chilling consisting of WC for 20 min and AC (CO20), and combined chilling consisting of WC for 30 min and AC (CO30) on the microbiological status, surface color, processing yield, and moisture content of yellow-feathered chicken carcasses. After chilling, the carcasses treated by AC exhibited the highest total viable counts (TVC) (4.7 cfu/cm2), followed by those treated by CO20 and CO30, whereas the carcasses treated by WC showed the lowest (P 0.05) was found among the carcasses treated by C

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Negative / Null Result ReportOpen accessPsychiatry

Comparison of the Effectiveness of Mindfulness Education and Emotional Focused Therapy on Couple Intimacy, Commitment and Happiness Women with Couple Burnout

ّForough Farshidmanesh, Hosein Davoudi, Hasan Heidari et al. · 2019 · Taḥqīqāt-i ̒Ulūm-i Raftārī

Aim and Background: Many women begin their marital life with high intimate relationships, but with time, these intimate relationships are becoming less and more difficult, and it is just when then couple burnout has begun. The purpose of this study was to comparison of the effectiveness of mindfulness education and Emotional Focused Therapy (EFT) on couple intimacy, commitment and happiness women with couple burnout. Methods and Materials: The semi-experimental study was performed as pretest-posttest with a control group. The population included all women with couple burnout who was referred t

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