Negative / Null Result ReportOpen accessMedicine
Gassé E, Brill A · 2026 · The western journal of emergency medicine
Introduction As public access to tetrahydrocannabinol (THC) products expands under state legalization, there is concern for increased use in adolescents under 18 years of age and its subsequent effects. Adverse effects of THC use have been…
View details →DOI: 10.5811/westjem.62946 Negative / Null Result ReportMedicine
Panaitof SC, Kermagi MM · 2026 · Archives of insect biochemistry and physiology
Dopamine has diverse roles in the regulation of reproduction and social behaviors in insects. In the burying beetle, Nicrophorus orbicollis, a species with extended care, our previous work has shown that brain dopamine levels increase…
View details →DOI: 10.1002/arch.70177 Negative / Null Result ReportMedicine
Majoe M, Stolarek N, Vizueta J et al. · 2026 · Journal of evolutionary biology
Colonies of insects with morphologically distinct castes have been called superorganisms because the function of their queens and workers is analogous to the germline and soma in metazoan bodies. In the case of formicoid ants, workers…
View details →DOI: 10.1093/jeb/voag043 Negative / Null Result ReportMedicine
Rodrigue JR, Fleishman A, Schold JD et al. · 2026 · Transplantation
Background Lost wages following living donation may deter patients from pursuing living donor kidney transplantation (LDKT) and potential donors from being evaluated. Methods We randomized patients undergoing transplant evaluation to 1 of…
View details →DOI: 10.1097/tp.0000000000005749 Negative / Null Result Report
Quispe M, Silva Rochefort B, Rojas MJ et al. · 2026 · Preprint
Seasonal reproduction in birds is commonly regulated by photoperiod, and passerines are generally considered long-day breeders. The Java sparrow (Padda oryzivora) has been proposed as a possible exception, but experimental evidence for…
View details →DOI: 10.22541/authorea.15003225/v1 Negative / Null Result ReportOpen accessMedicine
Ichishima J, Nakakariya M, Kimura H · 2026 · Scientific reports
Narcolepsy type 1 (NT1) is caused by a significant loss of orexin-producing neurons. In clinical trials, multiple orexin receptor 2 (OX2R)-selective agonists (e.g., danavorexton, TAK-994, and oveporexton) improved wakefulness and decreased…
View details →DOI: 10.1038/s41598-026-44080-9 Negative / Null Result Report
Toft S, Skalshøi MR, Brun-Witt L et al. · 2026 · Preprint
Balancing of macronutrient intake assumes that animals change their food preferences to increase consumption of the deficient nutrients and/or decrease consumption of nu-trients in excess. Harvestmen are generalist predators that consume…
View details →DOI: 10.20944/preprints202604.1469.v1 Replication FailureMedicine
Shibata K, Yamaguchi T, Takizawa K et al. · 2026 · Journal of strength and conditioning research
Abstract Shibata, K, Yamaguchi, T, Takizawa, K, and Nosaka, K. Comparison between eccentric-concentric and eccentric-only (ECC-only) dumbbell arm curl exercise for the number of repetitions to failure over five sets. J Strength Cond Res…
View details →DOI: 10.1519/jsc.0000000000005432 Negative / Null Result Report
Dulli L, Gbonon V, Touré F et al. · 2026 · Preprint
Background Mass Drug Administration (MDA) of azithromycin for the elimination of trachoma and, more recently, for the reduction of child mortality, are public health strategies shown, with mixed results, to contribute to the development of…
View details →DOI: 10.12688/gatesopenres.16385.1 Negative / Null Result Report
Ewers C, Keirsebelik H, Wang C et al. · 2026 · Preprint
Abstract Invasive species are one of the main drivers of global change. Gene flow among divergent lineages in the introduced range is frequently observed and has the potential to increase genetic diversity and adaptive potential. How much…
View details →DOI: 10.21203/rs.3.rs-9149727/v1 Negative / Null Result Report
Wani MM, Yalcinkaya A, Ali AA et al. · 2026 · Preprint
Abstract Background Major international sporting events are commonly perceived to increase trauma-related healthcare utilization. However, data specific to pediatric orthopaedic trauma are limited, particularly within centralized…
View details →DOI: 10.21203/rs.3.rs-9664403/v1 Negative / Null Result Report
Bachelder J, Tolu J, Winkel LH et al. · 2026 · Preprint
Organic amendments provide crops with nutrients, but can also add pollutants. Yet the fate of micronutrients such as zinc (Zn) and pollutants such as cadmium (Cd) in soil-crop systems is difficult to predict because of the complexity of…
View details →DOI: 10.64898/2026.04.21.718524 Negative / Null Result ReportMedicine
Yun G, Seo JW, Koo JR et al. · 2026 · Kidney research and clinical practice
Background Hyponatremia undercorrection (i.e., nonoptimal correction) is insufficient to resolve cerebral edema and is associated with poor clinical outcomes. This study aimed to identify risk factors of undercorrection under controlled…
View details →DOI: 10.23876/j.krcp.25.373 Negative / Null Result ReportMedicine
Normand-Gravier T, Solsona R, Bertrand-Gaday C et al. · 2026 · Experimental physiology
Recent evidence suggests that heat treatment (HT) and resistance training can limit skeletal muscle mass loss during immobilization. However, the effects of repeated HT sessions combined with hybrid exercises (EX), which promote both…
View details →DOI: 10.1113/ep093111 Negative / Null Result ReportMedicine
Yang Y, Zhou J, Zhao L et al. · 2026 · BMC pregnancy and childbirth
Introduction Compared with early cord clamping (ECC), delayed cord clamping (DCC) facilitates improved placental transfusion and increases blood volume in singleton pregnancies. However, evidence supporting the use of DCC in twins…
View details →DOI: 10.1186/s12884-026-09269-w Negative / Null Result ReportMedicine
Bar-On O, Less Elazari S, Ben-Zvi H et al. · 2026 · Respiration; international review of thoracic diseases
Introduction The prevalence and clinical significance of non-tuberculous mycobacteria (NTM) in individuals with primary ciliary dyskinesia (PCD) remain unclear, with most data extrapolated from cystic fibrosis. This first national…
View details →DOI: 10.1159/000552722 Negative / Null Result ReportMedicine
Berg J, Wang AI, Madssen E et al. · 2026 · Scientific reports
Insufficient physical activity (PA) among adolescents has deleterious consequences for their health. Exergaming, which combines exercise with gaming, is enjoyable, but the long-term effects of exergaming on adolescent health remain poorly…
View details →DOI: 10.1038/s41598-026-48327-3 Negative / Null Result ReportMedicine
Gong J, Xie B, Wei Y et al. · 2026 · Healthcare (Basel, Switzerland)
Background/objectives Pregnancy and childbirth are independent risk factors for pelvic floor injury. The choice of delivery position, as an interventionable factor during labor, has received much attention. This study aimed to assess the…
View details →DOI: 10.3390/healthcare14121681 Negative / Null Result ReportMedicine
Chin JH, Kim D, Lee HS et al. · 2026 · British journal of cancer
Background Adjuvant radiotherapy (RT) is standard for breast cancer, but its impact on skin cancer risk, especially in Asian populations, remains unclear despite advanced techniques. This study aimed to assess skin cancer incidence…
View details →DOI: 10.1038/s41416-026-03485-z Negative / Null Result Report
Prodel E, Gondim M, Mira PAdC et al. · 2026 · Preprint
Abstract Menopause represents the process during which oestrogen and progesterone synthesis and release cease, leading to the diminished protective cardiovascular effect of reproductive female hormones. Therefore, it is crucial to…
View details →DOI: 10.21203/rs.3.rs-9475086/v1 Replication FailureMedicine
Li N, Huang H, Jia Y et al. · 2026 · Clinical rheumatology
Objectives To explore the risk of relapse after glucocorticoids (GCs) withdrawal in patients with stable Sjögren's disease-associated interstitial lung disease (SjD-ILD). Methods This was a single-center, retrospective cohort study…
View details →DOI: 10.1007/s10067-025-07916-9 Negative / Null Result ReportMedicine
Hatta T, Kobayashi K, Tatematsu S et al. · 2026 · Clinical and experimental nephrology
Background Preventing end-stage renal failure progression of patients with chronic kidney disease (CKD) requires collaboration between nephrologists and general practitioners. Following the 2013 and 2019 surveys in Japan, a nationwide…
View details →DOI: 10.1007/s10157-026-02878-x Failed Experiment ReportMedicine
Liepinsh E, Krims-Dāvis K, Cirule H et al. · 2026 · Free radical biology & medicine
Apramycin has emerged as a promising antibacterial drug candidate that has demonstrated great preclinical efficacy and safety profile. In comparative studies, apramycin was found to be significantly less nephrotoxic than gentamicin;…
View details →DOI: 10.1016/j.freeradbiomed.2026.06.042 Abandoned HypothesisMedicine
Al Essa A, Schmidt HG, Mamede S et al. · 2026 · Medical education
Objective The purpose of the study reported in this article was to shed light on the cognitive mechanism mediating between biasing information and diagnostic error. The literature suggests at least two different hypotheses: premature…
View details →DOI: 10.1111/medu.70229 Negative / Null Result Report
Knight AL, Basoalto E · 2026 · Preprint
Field trials were conducted to define several parameters associated with adding LEDs to monitoring traps for codling moth (CM), Cydia pomonella (L.), using both a sex pheromone lure (PH1X) and a non-pheromone lure (CM4K). Traps with LEDs…
View details →DOI: 10.20944/preprints202603.1600.v1 Negative / Null Result Report
Wang C, Li D, Yang Q et al. · 2026 · Preprint
Abstract The space micro pump has a wide temperature range, and it experiences obvious thermodynamic effects during the high-temperature cavitation process, which leads to complex flow characteristics. To evaluate the influence of…
View details →DOI: 10.21203/rs.3.rs-8973167/v1 Negative / Null Result ReportMedicine
Park K, Kim J, Hu H et al. · 2026 · Journal of dairy science
Balancing for limiting AA may prevent reduced production when deficient MP is provided. The objective of the study was to determine the effects of rumen-protected (RP) His supplementation at different levels of MP when Lys and Met supplies…
View details →DOI: 10.3168/jds.2025-27548 Negative / Null Result Report
Ceháková M, Chromý J · 2026 · Preprint
Comprehenders often retain incorrect interpretations of garden-path sentences, suggesting that sentence representations are not always fully revised after misanalysis. A common assumption is that the additional processing time observed at…
View details →DOI: 10.31234/osf.io/537v8_v1 Negative / Null Result ReportMedicine
Lexchin J · 2026 · Health policy (Amsterdam, Netherlands)
Background Health Canada is proposing to use decisions by foreign regulators in approving new drugs to speed up their marketing. Objectives To investigate the length of gaps in submissions to and approvals by Health Canada compared to the…
View details →DOI: 10.1016/j.healthpol.2026.105631 Negative / Null Result ReportMedicine
van der Velden PG, Contino C, Kempe S et al. · 2026 · Acta psychologica
Background Adults may have individuals in their social circle who were recently exposed to potentially traumatic events (PTEs). The present study aims to examine if these adults are at increased risk for mental health problems and reduced…
View details →DOI: 10.1016/j.actpsy.2026.107136 