Negative / Null Result ReportOpen accessSocial Sciences
Mary Burns · 2013 · International Journal of Emerging Technologies in Learning (iJET)
The question of whether computers have positively or negatively impacted student learning is still hotly contested in educational technology circles, particularly in the area of international development, by proponents and critics of technology in education. Overall, research still provides conflicting answers to this question. Nonetheless, the abundant research on effective school change and innovation implementation points to practices which those who promote technology in schools should tap. This paper outlines the long-term structural conditions that can lead to the deep change technology
View details →Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology
Andreas Billich, Thomas Baumruker, Christian Beerli et al. · 2013 · PLoS ONE
BACKGROUND: Sphingosine-1-phosphate (S1P) regulates the egress of T cells from lymphoid organs; levels of S1P in the tissues are controlled by S1P lyase (Sgpl1). Hence, Sgpl1 offers a target to block T cell-dependent inflammatory processes. However, the involvement of Sgpl1 in models of disease has not been fully elucidated yet, since Sgpl1 KO mice have a short life-span. METHODOLOGY: We generated inducible Sgpl1 KO mice featuring partial reduction of Sgpl1 activity and analyzed them with respect to sphingolipid levels, T-cell distribution, and response in models of inflammation. PRINCIPAL FIN
View details →Negative / Null Result ReportOpen accessNursing
Gisele P. Oliveira, Cristina Márcia Dias, Paolo Pelosi et al. · 2010 · Anais da Academia Brasileira de Ciências
Glutamine (Gln) is an important energy source and has been used as a supplementary energy substrate. Furthermore, Gln is an essential component for numerous metabolic functions, including acid-base homeostasis, gluconeogenesis, nitrogen…
View details →Negative / Null Result ReportOpen accessMedicine
Florence T.H. Wu, Ping Xu, Annabelle Chow et al. · 2018 · British Journal of Cancer
There are phase 3 clinical trials underway evaluating anti-PD-L1 antibodies as adjuvant (postoperative) monotherapies for resectable renal cell carcinoma (RCC) and triple-negative breast cancer (TNBC); in combination with antiangiogenic VEGF/VEGFR2 inhibitors (e.g., bevacizumab and sunitinib) for metastatic RCC; and in combination with chemotherapeutics as neoadjuvant (preoperative) therapies for resectable TNBC. This study investigated these and similar clinically relevant drug combinations in highly translational preclinical models of micro- and macro-metastatic disease that spontaneously de
View details →Negative / Null Result ReportOpen accessEarth and Planetary Sciences
George B. McManus, Donald M. Schoener, Katharine Haberlandt · 2012 · Frontiers in Microbiology
Simultaneous use of both heterotrophic and autotrophic metabolism ("mixotrophy") is common among protists. Strombidium rassoulzadegani is a planktonic mixotrophic marine ciliate that saves chloroplasts from its algal food and obtains a nutritional subsidy via photosynthesis. Cultures from the northeast, northwest, and southwest Atlantic Ocean show similar numerical response parameters (maximum growth rate, food concentration at which growth is half its maximum, and threshold food concentration for growth), and some isolates have been maintained in vitro for over 3 years. This ciliate grows equ
View details →Negative / Null Result ReportOpen accessMaterials Science
Elisabet Martí Coma-Cros, Alexandre Lancelot, María San Anselmo et al. · 2019 · Biomaterials Science
Biomaterials for antimalarial drug transport still need to be investigated in order to attain nanocarriers that can tackle essential issues related to malaria treatment, e.g. complying with size requirements and targeting specificity for their entry into Plasmodium-infected red blood cells (pRBCs), and limiting premature drug elimination or drug resistance evolution. Two types of dendritic macromolecule that can form vehicles suitable for antimalarial drug transport are herein explored. A new hybrid dendritic-linear-dendritic block copolymer based on Pluronic® F127 and amino terminated 2,2'-bi
View details →Negative / Null Result ReportMedicine
Larisa I. Labzin, Keng Yih Chew, Kathrin Eschke et al. · 2023 · Science Signaling
Macrophages are key cellular contributors to the pathogenesis of COVID-19, the disease caused by the virus SARS-CoV-2. The SARS-CoV-2 entry receptor ACE2 is present only on a subset of macrophages at sites of SARS-CoV-2 infection in…
View details →Negative / Null Result ReportOpen accessMedicine
Christoph Rochlitz, Martin Bigler, Roger von Moos et al. · 2016 · BMC Cancer
BACKGROUND: Adding bevacizumab to chemotherapy improves response rates and progression-free survival (PFS) in metastatic breast cancer (mBC). We aimed to demonstrate decreased toxicity with metronomic chemotherapy/bevacizumab compared with paclitaxel/bevacizumab. METHODS: This multicenter, randomized phase III trial compared bevacizumab with either paclitaxel (arm A) or daily oral capecitabine-cyclophosphamide (arm B) as first-line treatment in patients with HER2-negative advanced breast cancer. The primary endpoint was the incidence of selected grade 3-5 adverse events (AE) including: febrile
View details →Negative / Null Result ReportOpen accessSocial Sciences
David Brady, Agnes Blome, Julie A. Kmec · 2018 · Socio-Economic Review
Abstract Prominent research has claimed that work–family reconciliation policies trigger ‘tradeoffs’ and ‘paradoxes’ in terms of gender equality with adverse labor market consequences for women. These claims have greatly influenced debates…
View details →Negative / Null Result ReportOpen accessMedicine
Huajun Zhang, Shawn Todd, Mary Tachedjian et al. · 2012 · Journal of Virology
Herpesviruses or herpesviral sequences have been identified in various bat species. Here, we report the isolation, cell tropism, and complete genome sequence of a novel betaherpesvirus from the bat Miniopterus schreibersii (MsHV). In…
View details →Negative / Null Result ReportOpen accessMedicine
Qinfeng Huang, Junjie Shao, Shuiyun Lan et al. · 2015 · Journal of Virology
UNLABELLED: Arenaviruses cause severe hemorrhagic fever diseases in humans, and there are limited preventative and therapeutic measures against these diseases. Previous structural and functional analyses of arenavirus nucleoproteins (NPs)…
View details →Negative / Null Result ReportPsychology
Irene M. Pepperberg, Leigh Ann Hartsfield · 2014 · Journal of comparative psychology
Linking specific cognitive abilities of nonhuman species on a laboratory task to their evolutionary history-ecological niche can be a fruitful exercise in comparative psychology. Crucial issues, however, are the choice of task, the…
View details →Negative / Null Result ReportOpen accessMedicine
Jessica J. Harrison, David Warrilow, Breeanna J. McLean et al. · 2016 · Viruses
The discovery and characterisation of new mosquito-borne viruses provides valuable information on the biodiversity of vector-borne viruses and important insights into their evolution. In this study, a broad-spectrum virus screening system, based on the detection of long double-stranded RNA in inoculated cell cultures, was used to investigate the presence of novel viruses in mosquito populations of northern Australia. We detected and isolated a new virus (tentatively named Parry's Lagoon virus, PLV) from Culex annulirostris, Culex pullus, Mansonia uniformis and Aedes normanensis mosquitoes that
View details →Negative / Null Result ReportOpen accessSocial Sciences
Adam K. Fetterman, Kai Sassenberg · 2015 · PLoS ONE
Scientists are dedicating more attention to replication efforts. While the scientific utility of replications is unquestionable, the impact of failed replication efforts and the discussions surrounding them deserve more attention. Specifically, the debates about failed replications on social media have led to worry, in some scientists, regarding reputation. In order to gain data-informed insights into these issues, we collected data from 281 published scientists. We assessed whether scientists overestimate the negative reputational effects of a failed replication in a scenario-based study. Sec
View details →Negative / Null Result ReportOpen accessSocial Sciences
Janina Molina Dargo, Michelle Dimas · 2021 · JETL (Journal Of Education Teaching and Learning)
Due to Covid-19 pandemic, schools, particularly in the rural areas employed Modular Distance Learning (MDL) to ensure education continuity. This study seeks to investigate the effects of MDL in the academic performance of learners whether…
View details →Negative / Null Result ReportOpen accessEarth and Planetary Sciences
Kaustubh Thirumalai, Julie N. Richey, Terrence M. Quinn et al. · 2014 · Scientific Reports
Planktic foraminifer Globigerinoides ruber (G. ruber), due to its abundance and ubiquity in the tropical/subtropical mixed layer, has been the workhorse of paleoceanographic studies investigating past sea-surface conditions on a range of…
View details →Negative / Null Result ReportMathematics
W. Trey Hill, Gary L. Brase · 2012 · Quarterly Journal of Experimental Psychology
The thesis that the mind is better prepared to process frequencies-as compared to other numerical formats-continues to be debated. A recent aspect of this issue is the role of numeracy (numerical literacy; one's ability to understand and…
View details →Negative / Null Result Report
Mary Garvey · 2023 · Infectious Disease Reports
The antimicrobial resistance crisis is an ongoing major threat to public health safety. Low- and middle-income countries are particularly susceptible to higher fatality rates and the economic impact of antimicrobial resistance (AMR). As an…
View details →Negative / Null Result ReportOpen accessEngineering
Seong Ki Yoo, Simon L. Cotton, Robert W. Heath et al. · 2017 · IEEE Wireless Communications Letters
In this letter, we report the results of a series of experiments which were performed to examine the impact of terminal handling and movement upon the user equipment (UE) to evolved NodeB (eNB) communications channel at 60 GHz. Three key utilization scenarios, in which a user imitated making a voice call, sending a text message or simply carrying the device in a pocket, are investigated. Each of these three user cases were studied under line of sight (LOS) and non-LOS (NLOS) channel conditions when the user was mobile in a range of different indoor and outdoor small cell scenarios. It is shown
View details →Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology
Linda M. Polfus, Jennifer A. Smith, Lawrence C. Shimmin et al. · 2013 · PLoS ONE
Many GWAS have identified novel loci associated with common diseases, but have focused only on main effects of individual genetic variants rather than interactions with environmental factors (GxE). Identification of GxE interactions is particularly important for coronary heart disease (CHD), a major preventable source of morbidity and mortality with strong non-genetic risk factors. Atherosclerosis is the major cause of CHD, and coronary artery calcification (CAC) is directly correlated with quantity of coronary atherosclerotic plaque. In the current study, we tested for genetic variants influe
View details →Negative / Null Result ReportOpen accessDecision Sciences
Chris Lu, Cong Lu, R. T. Lange et al. · 2026 · Nature
Abstract The automation of science is a long-standing ambition in artificial intelligence (AI) research 1,2 . Although the community has made substantial progress in automating individual components of the scientific process, a system that autonomously navigates the entire research life cycle—from conception to publication—has remained out of reach. Here we present a pipeline for automating the entire scientific process end to end. We present The AI Scientist, which creates research ideas, writes code, runs experiments, plots and analyses data, writes the entire scientific manuscript, and perf
View details →Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology
Klaudia Jomová, Suliman Yousef Alomar, Richard Valko et al. · 2025 · Archives of Toxicology
Abstract Cellular systems responsible for the formation and removal of reactive oxygen species (ROS), functioning within physiological limits, are essential for maintaining intracellular redox balance. This state is known as oxidative eustress. Key redox signaling molecules, such as superoxide anion radical (O 2 •— ) and hydrogen peroxide (H 2 O 2 ), operate at nanomolar concentrations and are produced by NADPH oxidases (regulated by various factors), the mitochondrial electron transport chain (ETC), and numerous enzymes. In addition, cell signaling is influenced by nitric oxide (NO • ) and re
View details →Negative / Null Result ReportOpen accessMedicine
L. Kavalieris, P.J. O’Sullivan, James M. Suttie et al. · 2015 · BMC Urology
BACKGROUND: Hematuria can be symptomatic of urothelial carcinoma (UC) and ruling out patients with benign causes during primary evaluation is challenging. Patients with hematuria undergoing urological work-ups place significant clinical and financial burdens on healthcare systems. Current clinical evaluation involves processes that individually lack the sensitivity for accurate determination of UC. Algorithms and nomograms combining genotypic and phenotypic variables have largely focused on cancer detection and failed to improve performance. This study aimed to develop and validate a model inc
View details →Negative / Null Result ReportOpen accessNursing
Mohamad Wessam Alnouri, Kenneth Anthony Roquid, Rémy Bonnavion et al. · 2024 · Proceedings of the National Academy of Sciences
Inflammation is a protective response to pathogens and injury. To be effective it needs to be resolved by endogenous mechanisms in order to avoid prolonged and excessive inflammation, which can become chronic. Specialized pro-resolving mediators (SPMs) are a group of lipids derived from omega-3 fatty acids, which can induce the resolution of inflammation. How SPMs exert their anti-inflammatory and pro-resolving effects is, however, not clear. Here, we show that SPMs such as protectins, maresins, and D-series resolvins function as biased positive allosteric modulators (PAM) of the prostaglandin
View details →Negative / Null Result ReportOpen accessMedicine
Meisam Yousefi, Wai Suet Lee, Biaoguo Yan et al. · 2022 · PLoS Pathogens
Transmembrane Protein 41B (TMEM41B) and Vacuole Membrane Protein 1 (VMP1) are two ER-associated lipid scramblases that play a role in autophagosome formation and cellular lipid metabolism. TMEM41B is also a recently validated host factor required by flaviviruses and coronaviruses. However, the exact underlying mechanism of TMEM41B in promoting viral infections remains an open question. Here, we validated that both TMEM41B and VMP1 are essential host dependency factors for all four serotypes of dengue virus (DENV) and human coronavirus OC43 (HCoV-OC43), but not chikungunya virus (CHIKV). While
View details →Negative / Null Result ReportOpen accessNeuroscience
Shaomin Peng, Geliang Gan, Caihong Qiu et al. · 2013 · Stem Cells Translational Medicine
Retinal degenerations are a major cause of impaired vision in the elderly. Degenerations originate in either photoreceptors or the retinal pigment epithelium (RPE). RPE forms the outer blood-retinal barrier and functions intimately with…
View details →Negative / Null Result Report
Malin Hildebrandt, Sabine Koch, Thomas Fuchs · 2016 · Behavioral Sciences
The treatment of deficits in social interaction, a shared symptom cluster in persons with schizophrenia (negative symptoms) and autism spectrum disorder (DSM-5 A-criterion), has so far remained widely unsuccessful in common approaches of…
View details →Negative / Null Result ReportMedicine
Andrée-Anne Houde, Stéphanie-May Ruchat, Catherine Allard et al. · 2015 · Epigenomics
AIM: To assess the associations between gestational diabetes mellitus (GDM) and DNA methylation levels at genes related to energy metabolism. PATIENTS & METHODS: Ten loci were selected from our recent epigenome-wide association study on…
View details →Negative / Null Result ReportOpen accessMedicine
Tracy L. Diamond, Winnie Ngo, Min Xu et al. · 2022 · Antimicrobial Agents and Chemotherapy
Islatravir (ISL) is a nucleoside reverse transcriptase translocation inhibitor (NRTTI) that inhibits human immunodeficiency virus (HIV) reverse transcription by blocking reverse transcriptase (RT) translocation on the primer:template. ISL…
View details →Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology
Aisling A. Geraghty, Alexandra Sexton‐Oates, Eileen C. O’Brien et al. · 2018 · Nutrients
The epigenetic profile of the developing fetus is sensitive to environmental influence. Maternal diet has been shown to influence DNA methylation patterns in offspring, but research in humans is limited. We investigated the impact of a low glycaemic index dietary intervention during pregnancy on offspring DNA methylation patterns using a genome-wide methylation approach. Sixty neonates were selected from the ROLO (Randomised cOntrol trial of LOw glycaemic index diet to prevent macrosomia) study: 30 neonates from the low glycaemic index intervention arm and 30 from the control, whose mothers re
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