Negative / Null Result ReportMedicine
Williams AE, Denaro K · 2026 · CBE life sciences education
Students often choose to study for exams with friends. Since active learning in class boosts success, instructors might expect studying with peers to also help. However, research offers little support for this. We investigated whether…
View details →DOI: 10.1187/cbe.25-04-0074 Negative / Null Result ReportMedicine
Can MB, Kara A, Adigüzel MC et al. · 2026 · British poultry science
1. Following the ban on prophylactic antibiotic use in feed for poultry, interest in natural alternatives has increased, particularly plant-derived extracts. In this study, the effects of Aronia melanocarpa fruit extract (AMF) on growth…
View details →DOI: 10.1080/00071668.2026.2673525 Negative / Null Result ReportOpen accessMedicine
Bregulla M, Packheiser J, Merz CJ et al. · 2026 · Scientific reports
Episodic memories can be shaped by various contextual factors. While social and sensory cues such as odors and music have been shown to influence encoding and retrieval, the role of tactile information remains unclear. In this…
View details →DOI: 10.1038/s41598-026-43969-9 Negative / Null Result ReportOpen accessMedicine
Marinello WP, Zylka MJ · 2026 · Frontiers in toxicology
Introduction Per- and polyfluoroalkyl substances (PFAS), particularly perfluorooctanoic acid (PFOA), are persistent environmental contaminants known for bioaccumulation and adverse health effects, including neurodevelopmental toxicity.…
View details →DOI: 10.3389/ftox.2026.1814052 Negative / Null Result ReportMedicine
Parhizmeymandi N, Azimi R, Sanjari MA et al. · 2026 · Motor control
Muscular fatigue often induces compensatory adjustments-such as increased motor unit recruitment and synchronization-that can elevate kinematic variability. By contrast, mental fatigue alters top-down neural control, modulates…
View details →DOI: 10.1123/mc.2025-0092 Negative / Null Result Report
McGlynn M, Steffes LC, Shah A et al. · 2026 · Preprint
Pulmonary arterial hypertension is a progressive, fatal disease driven by pathologic vascular remodeling including arterial medial hypertrophy, occlusive neointimal lesion formation, and venous muscularization. Current vasodilatory…
View details →DOI: 10.64898/2026.05.05.723006 Negative / Null Result Report
Albanna RH, El-Farraj H, Awawdeh S et al. · 2026 · Preprint
Abstract Apical debris extrusion is an unavoidable phenomenon; however, evidence remains limited regarding the effect of newer motion kinematics, specifically counterclockwise optimum torque reverse (CCW OTR). Sixty-six mandibular molars…
View details →DOI: 10.21203/rs.3.rs-9615788/v1 Replication FailureMedicine
Gkantidis N, Tsikouriadou E, Halazonetis D et al. · 2026 · Scientific reports
The present study investigated the association between facial shape and self-perceived personality and psychosocial traits. The study population consisted of 613 young adults (399 females and 214 males) aged 21-35 years, with similar…
View details →DOI: 10.1038/s41598-026-47895-8 Negative / Null Result Report
Skondras EV, Kamalakidis SN, Skondra E et al. · 2026 · Preprint
Implant-supported overdentures improve denture retention and patient satisfaction, but debonding of attachment housings from the denture base remains a frequent prosthetic complication. This in vitro study evaluated the influence of…
View details →DOI: 10.20944/preprints202604.2236.v1 Negative / Null Result ReportMedicine
Belenger M, Dumont C, Geelhand P et al. · 2026 · Journal of speech, language, and hearing research : JSLHR
Purpose We investigated sex differences in the production of pauses in autistic (pre-)adolescents in two conversational contexts: a monologue and an interactive discussion. Method This study included 107 French-speaking participants ( M…
View details →DOI: 10.1044/2026_jslhr-25-00565 Negative / Null Result ReportMedicine
Zhang M, Chai X, Zhang X et al. · 2026 · Annals of hematology
Chimeric antigen receptor T cells (CAR-T cells) have been widely applied in hematologic malignancies. It has shown limited efficacy in the treatment of myeloid neoplasms. We retrospectively analyzed the safety and efficacy of CD123 CAR-T…
View details →DOI: 10.1007/s00277-026-07097-8 Negative / Null Result Report
Seeger J, Henke NA · 2026 · Preprint
Astaxanthin can be derived from different sources such as petrochemical synthesis, natural sourcing from green algae or by microbial fermentation. As one of the strongest antioxidants known by nature, astaxanthin is rising attention as an…
View details →DOI: 10.20944/preprints202603.1409.v1 Replication Failure
van der Linden C, Trapp P, Dembek TA et al. · 2026 · Preprint
Background Deep brain stimulation (DBS) of the ventral intermediate nucleus and posterior subthalamic area (VIM/PSA) in Essential Tremor (ET) and the subthalamic nucleus (STN) in Parkinson’s disease (PD) are established treatment for…
View details →DOI: 10.64898/2026.05.31.26354199 Replication FailureMedicine
Webster E, Ng L, Prendergast K et al. · 2026 · Journal of insect physiology
Climate change and urbanisation are major drivers of global insect pollinator decline. However, the combined effects of these stressors remain poorly understood, particularly in relation to pollinator behaviour. Understanding how these…
View details →DOI: 10.1016/j.jinsphys.2025.104927 Replication FailureMedicine
Sheng YC, Chen X, Zhang YF et al. · 2026 · Huan jing ke xue= Huanjing kexue
Achieving ecological protection and high-quality development is the fundamental goal of sustainable development in the Yellow River Basin， and it is also an inevitable choice for the practice of the concept of Chinese-style modernization.…
View details →DOI: 10.13227/j.hjkx.202503345 Replication FailureMedicine
Cheng WJ, Kao CL, Hung IY · 2026 · Frontiers in nutrition
Background Hearing impairment is associated with an elevated risk of depression, yet modifiable risk factors in this population remain poorly characterized. Although vitamin D deficiency (VDD) has been linked to depression in general…
View details →DOI: 10.3389/fnut.2026.1856953 Negative / Null Result ReportMedicine
Szulim D, Kucharska E, Machalińska A et al. · 2026 · Nutrients
Background/Objectives : Age-related macular degeneration (AMD) is a leading cause of permanent deterioration of central vision in elderly people. While anti-VEGF therapy remains the standard of care for neovascular AMD, disease progression…
View details →DOI: 10.3390/nu18121870 Negative / Null Result ReportMedicine
Osorio-Vasco J, Rojas-Mora J, Barrera-Causil C et al. · 2026 · Work (Reading, Mass.)
BackgroundStanding work is common across a wide range of industries and service sectors and has been associated with the development of low back pain.ObjectiveTo analyze changes in low back pain across eight experimental scenarios…
View details →DOI: 10.1177/10519815261438027 Negative / Null Result ReportMedicine
Suttles S, Boeth RR, Frazier M et al. · 2026 · Military medicine
Objective Describe an innovative Sports Medicine clinic design implemented in an outpatient Physical Therapy (PT) clinic within a Military Treatment Facility (MTF) for both referral and direct access (DA) entry portal pathways, and to…
View details →DOI: 10.1093/milmed/usaf423 Negative / Null Result Report
Ramezani A, Rahimi S, Soltani A et al. · 2026 · Preprint
Abstract Background : Chronic pain is highly prevalent among older adults and has been shown to be associated with differences in cognitive function. While pain intensity reflects the severity of pain, pain interference assesses the extent…
View details →DOI: 10.21203/rs.3.rs-8852522/v1 Negative / Null Result ReportMedicine
Yılmaz A, Kurt D · 2026 · BMC pregnancy and childbirth
Objective To evaluate systemic immune-inflammatory biomarkers in patients diagnosed with eclampsia and to investigate their potential association with inflammation. Methods This retrospective study included 31 patients with eclampsia and…
View details →DOI: 10.1186/s12884-026-09487-2 Negative / Null Result Report
Chen G, Jiang L · 2026 · Preprint
Abstract How do contentious implementation processes reshape political trust in multi-level governance systems? This article examines this question through the case of land expropriation in China, a policy domain marked by visible local…
View details →DOI: 10.21203/rs.3.rs-9687433/v1 Failed Experiment Report
Abdulrida FM · 2026 · Preprint
Abstract Background: The Hepatitis B (HBV) and Hepatitis C (HCV) viruses remain significant global health challenges, contributing to chronic liver disease and life-threatening complications. This study aimed to investigate the genetic…
View details →DOI: 10.21203/rs.3.rs-9748714/v1 Negative / Null Result ReportMedicine
Henriques Cavalcanti Torres de Melo R, de Barros Silva PG, Neto HFEC et al. · 2026 · World journal of surgical oncology
Introduction Colorectal cancer (CRC) is one of the most prevalent malignancies worldwide, with up to 50% of patients developing metastatic disease, predominantly involving the liver. Hepatectomy remains the gold standard for resectable…
View details →DOI: 10.1186/s12957-026-04453-w Negative / Null Result ReportMedicine
Karlin NJ · 2026 · Psychological reports
Given the unique challenges faced by frontier aging older adults, such as limited access to healthcare and social services, the potential for different functional disabilities as compared to rural older adults exists. By comparing frontier…
View details →DOI: 10.1177/00332941261455769 Negative / Null Result ReportMedicine
Aghdasi Z, Negahban H, Movahedi Aliabadi M et al. · 2026 · The Journal of manual & manipulative therapy
Background Lumbar disc herniation (LDH) is a leading causes of low back pain (LBP). Conservative approaches, such as the McKenzie Method of Mechanical Diagnosis and Therapy (MDT), are widely used as first-line treatments. MDT is based on…
View details →DOI: 10.1080/10669817.2026.2683051 Negative / Null Result ReportMedicine
Park S, Shin JH, Moon WJ et al. · 2026 · Medicine
It is important to identify the origin of ultrasonographic punctate echogenic foci (PEF), which represent microcalcifications, in cervical lymph nodes (LNs). This study aimed to explore the malignancy rate of LNs with PEF and investigate…
View details →DOI: 10.1097/md.0000000000049440 Negative / Null Result ReportMedicine
Hussien A, Rao E, Roberts E et al. · 2026 · Spine deformity
Background Delayed presentation of Adolescent Idiopathic Scoliosis (AIS) is common in the UK and is characterised by larger Cobb angles at diagnosis. The size of the Cobb angle influences the mode and effectiveness of treatment strategies…
View details →DOI: 10.1007/s43390-026-01481-0 Negative / Null Result ReportMedicine
Lee W, Kim S, Ahmed KE et al. · 2026 · The Journal of prosthetic dentistry
Statement of problem The effect of different postpolymerization units on the mechanical reliability and degree of conversion (DC) of 3-dimensional (3D) printed interim resins remains unclear, particularly when third-party units are used…
View details →DOI: 10.1016/j.prosdent.2026.05.038 Negative / Null Result ReportMedicine
Öztürk Ü, Kurutaş EB, Üremiş N et al. · 2026 · Journal of clinical medicine
Background/Objectives: The G protein-coupled estrogen receptor (GPER) is known to interact with cellular stress responses and DNA damage pathways. Therefore, exposure to ionizing radiation may modulate the biological consequences of…
View details →DOI: 10.3390/jcm15124821 