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19,879 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 ReportOpen accessBiochemistry

IMPACT OF CULTIVAR ON THE NUTRITIONAL STATUS OF THE YOUNG APRICOT TREES (Prunus armeniaca L.)

Ljiljana Bošković-Rakočević, Tomo Milošević, Jelena Milivojević et al. · 2012 · Acta Scientiarum Polonorum: Hortorum Cultus

Mineral nutrition of apricot is very specific and depends on different factors such as soil fertility, soil pH, weather conditions, cultivars, rootstocks, fertilizers, age of trees etc. For these reasons, during 2008 and 2009 we evaluate nutrient status of five apricot cultivars (Vera, Aleksandar, Biljana, Harcot, Roxana) at 120 days after full bloom (DAFB) grown on acidic soil in the region of Čačak (Western Serbia). The results showed no statistically significant variations in the N, K and Ca content of apricot leaves among cultivars, as opposed to significant differences in the content of P

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Negative / Null Result ReportOpen accessMedical physics. Medical radiology. Nuclear medicine

Single-institution analysis of the prevalence, indications and outcomes of end-of-life radiotherapy

Sebastian M. Christ, Markus Schettle, Annina Seiler et al. · 2021 · Clinical and Translational Radiation Oncology

Background: Radiotherapy plays an important role for symptom control in advanced stage cancer patients. Yet patients need to be carefully selected, and its use and benefits must be weighed against time spent under treatment and patient priorities in the last phase of life. In this study, we assess prevalence, indications and outcomes of radiotherapy close to death. Methods: We screened all radiotherapy treatments performed at the Department of Radiation Oncology of the University Hospital Zurich between January 2010 and December 2019 to identify those which occurred near patients’ end-of-life.

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Negative / Null Result ReportOpen accessSurgery

COVID-Related Chronic Allograft Dysfunction in Lung Transplant Recipients: Long-Term Follow-up Results from Infections Occurring in the Pre-vaccination Era

René Hage, Macé M. Schuurmans · 2022 · Transplantology

Introduction: We report on characteristics and lung function outcomes among lung transplant recipients (LTRs) after COVID-19 with infections occurring in the first year of the coronavirus pandemic prior to introduction of the vaccines. Methods: This was a retrospective study of 18 LTRs who tested positive for SARS-CoV-2 between 1 February 2020 and 1 March 2021. The mean age was 49.9 (22–68) years; 12 patients (67%) were male. Two patients died due to severe COVID-19. Results: During the study period, there were 18 lung transplant recipients with a community-acquired SARS-CoV-2 infection. In th

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Negative / Null Result ReportOpen accessInformation technology

Preliminary Effects of a Mobile Interactive Supervised Therapy Intervention on People Living With HIV: Pilot Randomized Controlled Trial

Pang, Yan, Molton, James Steven, Ooi, Wei Tsang et al. · 2020 · JMIR mHealth and uHealth

BackgroundAs people living with HIV infection require lifelong treatment, nonadherence to medication will reduce their chance of maintaining viral suppression and increase the risk of developing drug resistance and HIV transmission. ObjectiveThis study aimed to evaluate the efficacy of a mobile app, Mobile Interactive Supervised Therapy (MIST), for improving adherence to oral HIV medications among HIV-infected adults in Singapore. MethodsWe conducted a two-group pilot randomized controlled trial (RCT) with a process evaluation, in which 40 HIV-infected participants with once-daily medication r

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Negative / Null Result ReportOpen accessNeurology. Diseases of the nervous system

The global Alzheimer's Association round robin study on plasma amyloid β methods

Josef Pannee, Leslie M. Shaw, Magdalena Korecka et al. · 2021 · Alzheimer’s & Dementia: Diagnosis, Assessment & Disease Monitoring

Abstract Introduction Blood‐based assays to measure brain amyloid beta (Aβ) deposition are an attractive alternative to the cerebrospinal fluid (CSF)–based assays currently used in clinical settings. In this study, we examined different blood‐based assays to measure Aβ and how they compare among centers and assays. Methods Aliquots from 81 plasma samples were distributed to 10 participating centers. Seven immunological assays and four mass‐spectrometric methods were used to measure plasma Aβ concentrations. Results Correlations were weak for Aβ42 while Aβ40 correlations were stronger. The rati

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Negative / Null Result ReportOpen accessDiseases of the musculoskeletal system

Development and Validation of Algorithms for Systemic Sclerosis Identification in Electronic Health Record Data

Gulsen Ozen, Michael O'Rorke, Paul Romitti et al. · 2026 · ACR Open Rheumatology

Objective The aim of this study was to develop and validate International Classification of Diseases (ICD) code–based algorithms for identifying systemic sclerosis (SSc) cases within electronic health record (EHR) data and to evaluate algorithm performance. Methods We identified patients with at least one ICD, Ninth Revision (ICD‐9)/ICD‐10 code for SSc in a large multicenter EHR dataset (TriNetX Research Network). A random sample of patients underwent detailed medical record review to confirm SSc diagnosis (gold standard). All ICD‐9/10 codes assigned during inpatient or outpatient encounters a

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Negative / Null Result ReportOpen accessAnimal culture

Influence of milking number and frequency on milk production in Martina Franca breed asses

G. Martemucci, A. G. D'Alessandro · 2010 · Italian Journal of Animal Science

Two experiments were carried out in Martina Franca asses in order to study milk yield and udder healthy conditions in relation to daily milking number and frequency. Experiment I - A total of 15 asses were subdivided into three groups (N.5) corresponding to: one milking per day, after a 3 hour interval from foal separation by dams (Group A); three milkings per day with 3 hour frequency (Group B); three milkings per day with 2 hour frequency (Group 3M). Experiment II - Evaluation was made of the effect of a schedule of 6 milkings per day with frequency of 2 hours on milk yield (Group 6M; N. 5),

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Negative / Null Result ReportOpen accessImmunologic diseases. Allergy

Fc-Glycosylation in Human IgG1 and IgG3 Is Similar for Both Total and Anti-Red-Blood Cell Anti-K Antibodies

Myrthe E. Sonneveld, Myrthe E. Sonneveld, Carolien A. M. Koeleman et al. · 2018 · Frontiers in Immunology

After albumin, immunoglobulin G (IgG) are the most abundant proteins in human serum, with IgG1 and IgG3 being the most abundant subclasses directed against protein antigens. The quality of the IgG-Fc-glycosylation has important functional consequences, which have been found to be skewed toward low fucosylation in some antigen-specific immune responses. This increases the affinity to IgG1-Fc-receptor (FcγR)IIIa/b and thereby directly affects downstream effector functions and disease severity. To date, antigen-specific IgG-glycosylation have not been analyzed for IgG3. Here, we analyzed 30 pregn

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Negative / Null Result ReportOpen accessChemical technology

Tisochrysis lutea as a Substrate for Lactic Acid Fermentation: Biochemical Composition, Digestibility, and Functional Properties

Caterina Pagnini, Giacomo Sampietro, Gaia Santini et al. · 2023 · Foods

Microalgae, because of their high nutritional value and bioactive molecule content, are interesting candidates for functional foods, including fermented foods, in which the beneficial effects of probiotic bacteria combine with those of biomolecules lying in microalgal biomass. The aim of this work was to evaluate the potential of Tisochrysis lutea F&M-M36 as a substrate for Lactiplantibacillus plantarum ATCC 8014 and to verify fermentation effects on functionality. Bacterium selection among three lactobacilli was based on growth and resistance to in vitro digestion. Microalgal raw biomass and

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Negative / Null Result ReportOpen accessDiseases of the endocrine glands. Clinical endocrinology

Vibration therapy as an effective approach to improve bone healing in diabetic rats

Maysa S. Campos, José B. Volpon, João Paulo B. Ximenez et al. · 2022 · Frontiers in Endocrinology

ObjectiveTo investigate the effects of vibration therapy on fracture healing in diabetic and non-diabetic rats.Methods148 rats underwent fracture surgery and were assigned to four groups: (1) SHAM: weight-matched non-diabetic rats, (2) SHAM+VT: non-diabetic rats treated with vibration therapy (VT), (3) DM: diabetic rats, and (4) DM+VT: diabetic rats treated with VT. Thirty days after diabetes induction with streptozotocin, animals underwent bone fracture, followed by surgical stabilization. Three days after bone fracture, rats began VT. Bone healing was assessed on days 14 and 28 post-fracture

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Negative / Null Result ReportMedicine

Association of age and primary treatment with risk of non-lymphoma-related death and long-term survival outcomes in adult patients with early-stage follicular lymphoma: a population-based analysis.

Xu, Wu, Liu et al. · 2026 · Annals of hematology

In adult patients with early-stage follicular lymphoma (FL), age-related differences in the risk of non-lymphoma-related death (LRD) during the follow-up period after treatment are unclear. We aimed to investigate the interactive effects…

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

The nonlinear relationship between estimated glomerular filtration rate and cardiovascular disease in US adults: a cross-sectional study from NHANES 2007–2018

Ce Zhou, You Zhou, Niannian Shuai et al. · 2024 · Frontiers in Cardiovascular Medicine

Background and aimEstimated glomerular filtration rate (eGFR) is a key indicator of kidney function and is associated with numerous health conditions. This study examines the association between eGFR and cardiovascular disease (CVD) risk in a representative cohort of the US adult population.MethodsA cross-sectional analysis was conducted using data from the National Health and Nutrition Examination Survey (NHANES) from 2007 to 2018. The study included 31,020 participants aged 20 years and older. The eGFR estimates were calculated using the Chronic Kidney Disease Epidemiology Collaboration (CKD

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Negative / Null Result ReportOpen accessMedicine

Interleukin-1β (IL-1β) C-511T polymorphism is associated with susceptibility to coronary artery disease in type 2 diabetic patients

Lijing Ma, Heng Su, Yan Wang et al. · 2020 · European Journal of Inflammation

Variants of the interleukin-1β (IL-1β) gene have been associated with type 2 diabetes (T2D) and coronary artery diseases (CAD). However, association of IL-1β polymorphisms with diabetic patients having CAD clinical manifestation has not been studied yet. In this study, we aim to decipher the role of IL-1β common promoter variants with susceptibility/resistance to development of CAD in T2D patients. T2D patients with (n = 134) or without CAD (n = 533) were enrolled. A total of 513 essentially healthy individuals from the same population were included in this study as control. Plasma levels of I

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Negative / Null Result ReportOpen accessNeurosciences. Biological psychiatry. Neuropsychiatry

Diabetes Treatment Is Associated With Better Cognitive Function: The Age Disparity

Keyi Wu, Huamin Liu, Jiazhen Zheng et al. · 2022 · Frontiers in Aging Neuroscience

Background: Diabetes mellitus (DM) is a recognised risk factor for cognitive dysfunction. The purpose of this study was to explore the relationship between active treatment for DM and cognitive function in middle-aged (< 60 years) and older adults (≥60 years), respectively.Methods: A total of 13,691 participants (58.55 ± 9.64 years, 47.40% of men) from the Chinese Health and Retirement Longitudinal Study (CHARLS) were included. The participants were classified into three groups according to whether or not they have diabetes and to their diabetes treatment status: diabetes-free, treated-diabete

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Negative / Null Result ReportOpen accessPediatrics

Association between parental factors and child's behaviors during moderate sedation in pediatric dental care

Mohamad A. Alanbari, Mohamad A. Alanbari, Hebah M. Hamdan et al. · 2024 · Frontiers in Pediatrics

Background/AimManaging young children with negative behaviors can be challenging in dental settings. Moderate sedation (MS) is often used as a treatment option for such children. However, children's behavior during MS may vary depending on several variables. These variables include parental factors, such as parental anxiety, coping strategies, and pain catastrophizing. However, this area, particularly in Saudi Arabia, remains underexplored. Therefore, this study aimed to assess the association among parental anxiety, coping style, pain catastrophizing, and children's behavior during MS among S

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Negative / Null Result ReportOpen accessNutrition. Foods and food supply

Dietary intake and serum concentrations of vitamin A and vitamin E and pre-eclampsia risk in Chinese pregnant women: A matched case-control study

Yanhua Liu, Shunping Ma, Xuemin Huang et al. · 2023 · Frontiers in Nutrition

BackgroundMany studies have suggested that the serum concentrations of vitamin A (VA) and vitamin E (VE) influence preeclampsia (PE) risk in pregnant women. However, few studies have assessed whether dietary intake and serum concentrations of VA and VE are correlated with PE risk.MethodsA 1:1 matched case-control study was conducted to explore the association between the dietary intake and serum concentrations of VA and VE and the risk of PE in pregnant Chinese women. A total of 440 pregnant women with PE and 440 control pregnant women were included in the study. Dietary information was obtain

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Negative / Null Result ReportOpen accessPublic aspects of medicine

Association between different composite dietary antioxidant indexes and low back pain in American women adults: a cross-sectional study from NHANES

Chaoqun Feng, Junjie Yao, Yizhou Xie et al. · 2024 · BMC Public Health

Abstract Background Low back pain is the leading cause of productivity loss, imposes a significant economic burden on the patients and society. Oxidative stress is considered a critical factor in the complex pathophysiological process and pathogenic mechanism of low back pain. Adjustment dietary pattern can effectively increase antioxidant biomarkers levels within the body to reduce oxidative stress. The composite dietary antioxidant index (CDAI) serves a reliable scoring system for quantifying the potential dietary antioxidant capacity of daily diets. Objective We aim to investigate the poten

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Negative / Null Result ReportOpen accessPediatrics

Sickle Cell Nephropathy and Associated Factors among Asymptomatic Children with Sickle Cell Anaemia

Uchenna Modestus Nnaji, Christian Chukwukere Ogoke, Henrietta Uche Okafor et al. · 2020 · International Journal of Pediatrics

Background. Sickle cell nephropathy (SCN) is a serious complication of sickle cell anaemia (SCA) with asymptomatic onset in childhood and possible progression to chronic kidney disease (CKD). In Southeast Nigeria, few studies have evaluated renal function in paediatric SCA patients for early detection of renal impairment and early intervention to reduce morbidity and mortality. Therefore, this study evaluated the renal function of paediatric SCA patients in a steady state based on glomerular filtration rate and urinalysis findings (proteinuria and haematuria). Methods. A cross-sectional study

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Negative / Null Result ReportMedicine

Determinants of Speech Perception Outcomes After Hearing Aid Fitting in Conductive and Sensorineural Hearing Loss: A Prospective Longitudinal Observational Study.

Izbassarova, Imangaliyeva, Bakhshinyan et al. · 2026 · Audiology research

Background/Objectives: Hearing loss is a leading cause of disability worldwide, with speech perception representing a key functional outcome of auditory rehabilitation. While hearing aids improve audibility, outcomes vary substantially…

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Negative / Null Result ReportMedicine

Associations between Age, Treatment Modality and Survival in Atypical Meningioma: Analysis of the SEER Database, 2000-2021.

Yang · 2026 · Journal of investigative surgery : the official journal of the Academy of Surgical Research

Atypical meningiomas have higher recurrence and mortality than benign variants, and age may influence treatment decisions and outcomes. We evaluated associations between age, treatment modality, and survival in patients with atypical…

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Negative / Null Result ReportMedicine

Helicobacter pylori Eradication in the Era of Rising Antibiotic Resistance: A Randomized Controlled Comparison of Clarithromycin- and Levofloxacin-Based Triple Therapy with or without Lactoferrin.

Elganzory, Baraka, Elkholy et al. · 2026 · La Clinica terapeutica

Helicobacter pylori infection affects nearly half of the global population and is a major cause of peptic ulcer disease and gastric cancer. Increasing antibiotic resistance, particularly to clarithromycin, has reduced the efficacy of…

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Negative / Null Result ReportMedicine

The effect of 30&#xb0; and 70&#xb0; arthroscope use on femoral and tibial tunnel placement in arthroscopic anterior cruciate ligament reconstruction surgery.

Kilinc, G&#xfc;naydin, Demirtas et al. · 2026 · Revista da Associacao Medica Brasileira (1992)

The success of anterior cruciate ligament reconstruction depends on anatomical tunnel placement. The aim of this was to compare the effects of 30&#xb0; and 70&#xb0; arthroscopes on femoral and tibial tunnel positioning and their…

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