12,066 results match your criteria: "University of Tartu; Riia Street 23[Affiliation]"

A high-precision dataset of breeding bird distributions in forested landscapes in Estonia.

Data Brief

December 2024

Department of Zoology, Institute of Ecology and Earth Sciences, University of Tartu, J. Liivi 2, EE50409 Tartu, Estonia.

Diversity and abundance of breeding birds are frequently reported and analysed as indicators of environmental change. However, such data available for forests typically contain either relative abundances based on snapshot observations or have been collected in small sample plots, which limit their distributional and ecological analysis across landscapes. I present a spatial dataset from three adjacent landscapes in Estonia (hemiboreal Europe), which has been obtained by standard multiple-visit mapping of nesting territories in 2020-2022.

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Biopsy vitrification: New tool for endometrial tissue cryopreservation for research applications.

Cryobiology

December 2024

Celvia CC AS, Tartu, Estonia; Department of Obstetrics and Gynecology, Institute of Clinical Medicine, University of Tartu, Tartu, Estonia; Division of Obstetrics and Gynecology, Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, and Karolinska University Hospital, Stockholm, Sweden.

Patient-derived endometrial biopsies serve as a crucial source for molecular studies, highlighting the necessity for tissue cryopreservation methods that preserve cell viability and tissue morphology with minimal to no impact. The passive slow freezing (PSF) protocol has demonstrated efficacy for cryopreserving endometrial biopsies, allowing for the subsequent isolation of viable epithelial and stromal cells. Vitrification (VT) enables the avoidance of ice crystal formation and could therefore potentially prevent mechanical injury to tissues.

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Skin conductance response (SCR) serves as a dependable marker of sympathetic activation used to measure emotional arousal. This study investigates the impact of presentation modality (face or word) on the degree of emotional discrimination elicited by SCR. Facial expressions or words associated with six basic emotions-anger, happiness, disgust, fear, sadness, and surprise-were studied among 102 participants.

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Article Synopsis
  • A study assessed the effectiveness of the autumn 2023 COVID-19 vaccination in 1,305 healthcare workers across 13 European hospitals against confirmed SARS-CoV-2 infections.
  • Overall, the vaccine effectiveness was found to be 22%, with a notable difference in effectiveness before and after the predominant circulation of specific variants (BA.2.86/JN.1).
  • The findings suggest that the autumn 2023 vaccination resulted in only a moderate-to-low reduction in infection rates among healthcare workers, emphasizing the need for ongoing monitoring of vaccine effectiveness for better COVID-19 prevention strategies.
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Improvement in photosynthesis under different light intensities is highly linked to domestication stages in cotton.

Plant J

December 2024

Key Laboratory of Oasis Eco-Agriculture, Xinjiang Production and Construction Corps, Shihezi University, Shihezi, 832003, P.R. China.

Domestication has dramatically increased crop size and biomass, reflecting the enhanced accumulation of photosynthates. However, we still lack solid empirical data on the impacts of domestication on photosynthetic rates at different light intensities and on leaf anatomy, and of the relationships of photosynthesis with aboveground biomass. In this study, we measured the photosynthetic rate at three photosynthetic photon flux densities of 2000 (high), 1000 (moderate) and 400 μmol m sec (low light intensity), dark respiration, relative chlorophyll content (SPAD), leaf morphology, and aboveground biomass in 40 wild, 91 semiwild, and 42 domesticated cotton genotypes.

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Bioelectrochemical anaerobic ammonium oxidation (anammox) systems allow eco-friendly removal of nitrogen from reject wastewater coming from biogas processing as the anammox bacteria have previously shown to have c-type cytochromes acting in the extracellular electron transport (EET) mechanism between the bacteria and electrode. The anammoxosome compartment present in anammox bacteria features a highly curved membrane and contains tubular structures along with electron-dense particles that contain iron, which could enhance the process of EET and enhance nitrogen removal by properly applied potentials. In this study, nitrogen removal was investigated in the electrostimulated anammox nitrogen removal (EANR) cells operated comparatively at open circuit and at applied potentials of - 300 mV, - 500 mV, and - 700 mV vs.

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Impact of global environmental changes on the range contraction of Eurasian moose since the Late Pleistocene.

Sci Total Environ

December 2024

Department of Palaeozoology, Faculty of Biological Sciences, University of Wrocław, Sienkiewicza 21, 50-335 Wrocław, Poland.

Climatic oscillations are considered primary factors influencing the distribution of various life forms on Earth. Large species adapted to cold climates are particularly vulnerable to extinction due to climate changes. In our study, we investigated whether temperature increase since the Late Pleistocene and the contraction of environmental niche during the Holocene were the main factors contributing to the decreasing range of moose (Alces alces) in Europe.

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Introduction: Patients with severe asthma may be prescribed biologic therapies to improve disease control. The EVEREST study aimed to characterize the global disease burden of patients with severe asthma without access to biologics and those who have access but do not receive biologics, as well as the remaining unmet need despite use of these therapies.

Methods: This was a historical cohort study of patients with severe asthma (aged ≥18 years) in the International Severe Asthma Registry receiving Global Initiative for Asthma (GINA) 2018 step 5 treatment, or with uncontrolled disease at GINA step 4.

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Article Synopsis
  • Cotyledons and primary leaves have different strategies for growth in early seedling development, influenced by the availability of light.
  • A study sampled seedlings from both open (high light) and shaded (low light) environments to compare the relationships between leaf mass and area for both leaf types using statistical analysis methods.
  • Findings revealed that cotyledons in both light environments exhibited diminishing returns on investment, while primary leaves in open environments showed increasing returns, indicating varying adaptive strategies for light conditions between the two leaf types.
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Efficient Defect-Driven Cation Exchange beyond the Nanoscale Semiconductors toward Antibacterial Functionalization.

ACS Appl Mater Interfaces

November 2024

School of Engineering, Department of Materials and Environmental Technology, TalTech, Ehitajate tee 5, 19086 Tallinn, Estonia.

Defect engineering is an exciting tool for customizing semiconductors' structural and optoelectronic properties. Elaborating programmable methodologies to circumvent energy constraints in multievent inversions expands our understanding of the mechanisms governing the functionalization of nanomaterials. Herein, we introduce a novel strategy based on defect incorporation and solution rationalization, which triggers energetically unfavorable cation exchange reactions in extended solids.

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This article presents an in-depth investigation into the influence of anionic structures of ionic liquids (ILs) on gas-ionic liquid partition coefficients (log ) of organic solutes in three ILs. While the primary objective was to examine whether there is a relationship between the molecular structure of the IL anion component and log , additionally it was looked at whether the molecular descriptors of the anion in the relationships encode possible molecular interactions during the miscibility and partitioning in the IL. The research involves the compilation of data series of experimental log values, where the cation component is constant.

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Successful embryo implantation relies on synchronized dialog between the embryo and endometrium, and the role of extracellular vesicles (EVs) in facilitating this cross-talk has been recently established. In our previous study, milk fat globule-EGF factor 8 protein (MFGE8) was identified as increasing in receptive endometrial epithelial cells (EECs) in response to trophoblastic EVs. However, the dynamics of MFGE8 protein in this context are not completely understood.

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We evaluated the efficacy of large language models (LLMs), specifically, generative pre-trained transformer-4 (GPT-4), in predicting pregnancy following in vitro fertilization (IVF) treatment and compared its accuracy with results from an original published study. Our findings revealed that GPT-4 can autonomously develop and refine advanced machine learning models for pregnancy prediction with minimal human intervention. The prediction accuracy was 0.

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Introduction: The 2018 published World Health Organisation (WHO) Europe physical activity factsheet reports, specify agreed targets for physical activity and articulate the need to improve the education of medical doctors and healthcare practitioners in order to increase physical activity and reduce sedentary time in people at risk and/or living with Noncommunicable Diseases (NCDs). Given the dearth of relevant initiatives and the continuous need to increase physical activity participation towards better health management of NCDs, the aim of this study is to embed physical activity in the undergraduate curricula of future frontline healthcare professionals (medical doctors and allied health professions) in European countries.

Methods: The irtual dvice, urturing, uidance on niversal ction, esearch and evelopment for physical activity and sport engagement (VANGUARD) project consists of a collaborative partnership Consortium between six European Universities, WHO Europe and Ministry representatives that has been developed to implement physical activity in the curricula of medical schools and healthcare professions.

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Despite the numerous published syntheses and applications of sulfoximines, very few studies describe their physico-chemical properties and in particular their acidic, basic and lipophilic or hydrophilic characters. We report for the first time the acidity values (pK) of fluorinated sulfoximines in water and in acetonitrile, as well as the basicity (pK) measurements of fluorinated and non-fluorinated sulfoximines in acetonitrile. The same sulfoximine library was also studied in terms of lipophilicity with measurement of the Hansch parameters of the sulfoximine moieties.

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The impact of subthalamic nucleus (STN) deep brain stimulation (DBS) on neuropsychiatric fluctuations in Parkinson´s disease (PD) remains unclear. The Neuropsychiatric Fluctuations Scale (NFS) can help to fill this gap, directly measuring fluctuations between the OFF- and ON-medication conditions. The NFS provides NFS-plus (hyperdopaminergic) and NFS-minus (hypodopaminergic) sub-scores.

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Combining the pharmacological properties of the 1,2,3-triazole and dihydropyrimidinone classes of compounds, two small families of mono- and di(1,2,3-triazole)-dihydropyrimidinone hybrids, A and B, were previously synthesized. The main objective of this work was to investigate the potential anti-Alzheimer effects of these hybrids. The inhibitory activities of cholinesterases (AChE and BuChE), antioxidant activity, and the inhibitory mechanism through in silico (molecular docking) and in solution (STD-NMR) experiments were evaluated.

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Women's perspectives on the acceptability of risk-based cervical cancer screening.

BMC Cancer

October 2024

Institute of Family Medicine and Public Health, Faculty of Medicine, University of Tartu, Ravila 19, Tartu, 50411, Estonia.

Background: The increased knowledge of cervical cancer (CC) risk factors and suboptimal performance of present screening programs has generated interest in shifting from a universal screening approach to one based on individual risk assessment. To inform the future development of risk-based CC screening programs, it is crucial to gain insight into the factors influencing the acceptability of such approach among screening target group women. The aim of this study was to prospectively investigate the acceptability of risk-based CC screening and to identify potential barriers.

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Metabolic Aspects in Vascular Practice.

Eur J Vasc Endovasc Surg

October 2024

Department of Surgery, Institute of Clinical Medicine, University of Tartu, Tartu, Estonia. Electronic address:

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Article Synopsis
  • The study analyzed global, regional, and national trends in injury burden and identified risk factors contributing to injuries using data from the GBD 2019.
  • In 2019, there were approximately 713.9 million injury incidents and 4.3 million injury-related deaths globally, with low bone mineral density emerging as the leading risk factor.
  • The findings emphasize the need for effective global injury prevention policies by highlighting the persistent impact of injuries on global health.
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Use of Decellularized Bio-Scaffolds for the Generation of a Porcine Artificial Intestine.

Methods Protoc

September 2024

Laboratory of Biomedical Embryology and Tissue Engineering, Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Via dell'Università 6, 26900 Lodi, Italy.

In recent years, great interest has been focused on the development of highly reproducible 3D in vitro models that are able to mimic the physiological architecture and functionality of native tissues. To date, a wide range of techniques have been proposed to recreate an intestinal barrier in vitro, including synthetic scaffolds and hydrogels, as well as complex on-a-chip systems and organoids. Here, we describe a novel protocol for the generation of an artificial intestine based on the creation of decellularized bio-scaffolds and their repopulation with intestinal stromal and epithelial cells.

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Flavonoid-Mediated Suppression of Tumor Angiogenesis: Roles of Ang-Tie/PI3K/AKT.

Pathophysiology

October 2024

Amity Institute of Environmental Toxicology, Safety and Management, Amity University, Sector-125, Noida 201303, India.

Angiogenesis is a process involved in the formation of new blood capillaries from pre-existing ones. It is regulated by several anti-angiogenic molecules involved in tumor growth and metastasis. The endothelial angiopoietin Ang-Tie/PI3K/AKT growth receptor pathway is necessary for healthy vascular development.

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