115,303 results match your criteria: "Czech Republic; Institute of Vertebrate Biology[Affiliation]"

Compositionally complex doping of spinel oxides toward high-entropy oxides is expected to enhance their electrochemical performance substantially. We successfully prepared high-entropy compounds, the oxide (ZnMgCoCu)FeO (HEOFe), lithiated oxyfluoride Li(ZnMgCoCu)FeOF (LiHEOFeF), and lithiated oxychloride Li(ZnMgCoCu)FeOCl (LiHEOFeCl) with a spinel-based cubic structure by ball milling and subsequent heat treatment. The products exhibit particles with sizes from 50 to 200 nm with a homogeneous atomic distribution.

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The lateral line system enables fishes and aquatic-stage amphibians to detect local water movement via mechanosensory hair cells in neuromasts, and many species to detect weak electric fields via electroreceptors (modified hair cells) in ampullary organs. Both neuromasts and ampullary organs develop from lateral line placodes, but the molecular mechanisms underpinning ampullary organ formation are understudied relative to neuromasts. This is because the ancestral lineages of zebrafish (teleosts) and (frogs) independently lost electroreception.

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Article Synopsis
  • The study highlights the need for changes in physiotherapy training due to declining physical activity levels among the population.
  • The research found that Czech physiotherapy students generally fell short of recommended physical activity levels, with 55% of men and 41% of women not achieving the target.
  • Using wearables was shown to increase motivation for physical activity among students, indicating readiness to incorporate these tools in professional practice.
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Climate change poses an unprecedented threat to forest ecosystems, necessitating innovative adaptation strategies. Traditional assisted migration approaches, while promising, face challenges related to environmental constraints, forestry practices, phytosanitary risks, economic barriers, and legal constraints. This has sparked debate within the scientific community, with some advocating for the broader implementation of assisted migration despite these limitations, while others emphasize the importance of local adaptation, which may not keep pace with the rapid rate of climate change.

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  • The study examines the Yuzhniy Oleniy Ostrov burial site, focusing on group dynamics and regional interactions of the Mesolithic population in Northern Europe.
  • Radiogenic strontium isotope analysis revealed that most individuals likely lived semi-permanently near Lake Onega, with only two showing evidence of having spent time outside the area.
  • The findings suggest stable residential patterns for Late Mesolithic foragers while also highlighting connections to broader communication networks, indicating some long-distance interactions.
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  • A team of over 180 researchers from more than 40 countries is addressing the issues related to "phantom agents," which are proposed pathogenic agents that are listed without concrete evidence of their existence.
  • These phantom agents, identified only through symptoms and lacking proper isolates or genetic data, create obstacles for trade and plant certification, making effective detection and risk assessment difficult.
  • The researchers recommend removing these agents from regulatory lists and updating standards in line with modern diagnostic methods to facilitate germplasm exchange and support global agriculture.
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Black aluminum is a material characterized by high surface porosity due to columnar growth and exhibits unique optical properties that make it attractive for applications such as light trapping, infrared detection, and passive thermal radiation cooling. In this study, we correlate the structural and optical properties of black aluminum by comparing it with conventional reflective aluminum layers. These layers of varying thicknesses were deposited on fused silica substrates, and their optical properties were analyzed.

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Purpose: Prostate-specific membrane antigen (PSMA) radioligand therapy is a promising treatment for metastatic castration-resistant prostate cancer (mCRPC). Several beta or alpha particle-emitting radionuclide-conjugated small molecules have shown efficacy in late-stage mCRPC and one, [[177Lu]Lu]Lu-PSMA-617, is FDA approved. In addition to tumor upregulation, PSMA is also expressed in kidneys and salivary glands where specific uptake can cause dose-limiting xerostomia and potential for nephrotoxicity.

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Reduced number of regulatory T cells in maternal circulation precede idiopathic spontaneous preterm labor in a subset of patients.

Am J Obstet Gynecol

December 2024

Department of Gynecology, Obstetrics and Neonatology, General University Hospital in Prague and First Faculty of Medicine, Charles University, Prague, Czech Republic. Electronic address:

Article Synopsis
  • Spontaneous preterm labor is linked to the maternal immune system's failure to tolerate the fetus, often characterized by a chronic inflammatory response, particularly involving regulatory T cells.
  • The study examined 43 women in early pregnancy to see if the levels of specific regulatory T cell subpopulations could predict premature labor.
  • Results showed that women who experienced preterm labor had significantly lower levels of all analyzed regulatory T cell subpopulations compared to those who delivered at term, suggesting a potential immune imbalance contributing to preterm outcomes.
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Outstanding enrichment of ladderane lipids in anammox bacteria: Overlooked effect of pH.

J Environ Manage

December 2024

University of Chemistry and Technology Prague, Department of Water Technology and Environmental Engineering, Technická 5, 166 28, Prague, Czech Republic. Electronic address:

Ladderane lipids synthesised by anammox bacteria hold significant potential for applications in jet fuel, drug delivery, and optoelectronics. Despite the widespread use of anammox bacteria in nitrogen removal from wastewater, the optimal conditions for maximising ladderane production remain unclear, limiting their broader application. To address this, we operated a fed-batch bioreactor with anammox bacteria, gradually adjusting the pH from 6.

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Optimal control: From sensitivity improvement to alternative pulse-sequence design in solid-state NMR.

Solid State Nucl Magn Reson

December 2024

Department of Chemistry, Faculty of Science, Charles University, Albertov 6, 12842, Prague, Czech Republic.

Exciting developments in new experimental methods for multidimensional solid-state NMR spectroscopy have recently been achieved using optimal-control theory. These results, in turn, have triggered the development of new pulse sequences based on traditional analytical theories. This trend article summarises the key steps leading to these advancements.

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Objective: The aim of this qualitative study is to develop a conceptual model for the school life of the children with epilepsy based on grounded theory methodological framework.

Methodology: A total of 20 children with epilepsy participated in the semi-structured interviews. Inclusion criteria were age of 8-15 years, IQ higher than 70, duration of epilepsy of at least of two years and attendance of mainstream schools.

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The Bioprotective Effects of Marigold Tea Polyphenols on Obesity and Oxidative Stress Biomarkers in High-Fat-Sugar Diet-Fed Rats.

Cardiovasc Ther

January 2025

Centre for Natural Products Discovery, School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, James Parsons Building, Byrom Street, Liverpool L3 3AF, UK.

The research is aimed at exploring the potential of marigold petal tea (MPT), rich in polyphenol contents, against oxidative stress and obesity in a rat model following a high-fat-sugar diet (HFSD). The MPT was prepared through the customary method of decoction and was subjected to analysis for its polyphenol composition using reversed-phase high-performance liquid chromatography (RP-HPLC). Two specific doses of MPT, namely, 250 and 500 mg/kg body weight (BW), were chosen for the study-referred to as MPT-250 and MPT-500, respectively.

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Background/aim: Low levels of vitamin D are a widespread global issue. This study aimed to determine the optimal vitamin D3 supplementation dose for healthy young adults by comparing the effectiveness of gradually increasing cholecalciferol doses over two years.

Patients And Methods: Thirty-five volunteers participated in a two-season pilot study conducted from October to April to avoid sunlight-induced vitamin D3 synthesis.

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Microbiome and radiotherapy represent bidirectionally interacting entities. The human microbiome has emerged as a pivotal modulator of the efficacy and toxicity of radiotherapy; however, a reciprocal effect of radiotherapy on microbiome composition alterations has also been observed. This review explores the relationship between the microbiome and extracranial solid tumors, particularly focusing on the bidirectional impact of radiotherapy on organ-specific microbiome.

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Low-grade hemodilution improves the microcirculatory function in surgical patients.

Microvasc Res

December 2024

Dept. of Anesthesiology, Resuscitation and Intensive Care Medicine, University Hospital Hradec Kralove, Czech Republic; Faculty of Medicine Hradec Kralove, Charles University, Czech Republic; Faculty of Health Sciences, Technical University in Liberec, Czech Republic.

Background: Excess fluid in the interstitium can adversely affect the microcirculation. We studied how gradual dilution of the blood plasma by crystalloid fluid influences microcirculatory variables and capillary filtration in 20 patients undergoing surgery.

Methods: Video recordings of the sublingual mucosal were made on four occasions during the surgery and compared with quasi-measurements of the capillary filtration rate using retrospective volume kinetic data collected over 5-10-minute periods during 262 infusion experiments with crystalloid fluid.

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The ApxIVA protein belongs to a distinct class of a "clip and link" activity of Repeat-in-ToXin (RTX) exoproteins. Along with the three other pore-forming RTX toxins (ApxI, ApxII and ApxIII), ApxIVA serves as a major virulence factor of Actinobacillus pleuropneumoniae, the causative agent of porcine pneumonia. The gene encoding ApxIVA is located on a bicistronic operon downstream of the orf1 gene and is expressed exclusively under in vivo conditions.

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The use of self-adaptive principal components in PCA-based denoising.

J Magn Reson

December 2024

Department of Low-Temperature Physics, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 747/2, 180 00 Prague 8, Czech Republic.

PCA-based denoising usually implies either discarding a number of high-index principal components (PCs) of a data matrix or their attenuation according to a regularization model. This work introduces an alternative, model-free, approach to high-index PC attenuation that seeks to average values of PC vectors as if they were expected from noise perturbation of data. According to the perturbation theory, the average PCs are attenuated versions of the clean PCs of noiseless data - the higher the noise-related content in a PC vector, the lower is its average's norm.

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Carbon Monoxide-Releasing Activity of Plant Flavonoids.

J Agric Food Chem

December 2024

Institute of Medical Biochemistry and Laboratory Diagnostics, and 4th Department of Internal Medicine, General University Hospital in Prague and 1st Faculty of Medicine, Charles University, Na Bojišti 3, Prague 2 12108, Czech Republic.

Flavonoids are naturally occurring compounds found in fruits, vegetables, and other plant-based foods, and they are known for their health benefits, such as UV protection, antioxidant, anti-inflammatory, and antiproliferative properties. This study investigates whether flavonoids, such as quercetin and 2,3-dehydrosilybin, can act as photoactivatable carbon monoxide (CO)-releasing molecules under physiological conditions. CO has been recently recognized as an important signaling molecule.

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Lenvatinib plus pembrolizumab significantly improved efficacy versus sunitinib in treatment of advanced renal cell carcinoma (aRCC) in the phase 3 CLEAR study. We report results of an exploratory post hoc analysis of tumor response data based on baseline metastatic characteristics of patients who received lenvatinib plus pembrolizumab versus sunitinib, at the final overall survival analysis time point of CLEAR (cutoff: July 31, 2022). Treatment-naïve adults with aRCC were randomized to: lenvatinib (20 mg PO QD in 21-day cycles) plus pembrolizumab (n = 355; 200 mg IV Q3W); lenvatinib plus everolimus (not reported here); or sunitinib (n = 357; 50 mg PO QD; 4 weeks on/2 weeks off).

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Over 400 cyanobacterial genera have been described up to the present. Since the Cambridge Rules (https://www.iapt-taxon.

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Acute effects of supramaximal loaded back squat activation on countermovement jump performance, muscle mechanical properties, and skin surface temperature in powerlifters.

Eur J Sport Sci

January 2025

Nutrition and Sports Performance Research Group, The Jerzy Kukuczka Academy of Physical Education in Katowice, Katowice, Poland.

This study aimed to investigate the effects of performing either eccentric-only (ECC) or eccentric-concentric (ECC-CON) back squats (BS) with a supramaximal load on countermovement jump (CMJ) performance. Changes in front thigh skin surface temperature and mechanical properties (oscillation frequency and stiffness) of the vastus lateralis were also examined. Fourteen male powerlifters participated in this study (age: 22.

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Cognitive-behavioural therapy for insomnia mechanism of action: Exploring the homeostatic K-complex involvement.

J Sleep Res

December 2024

Vita-Salute San Raffaele University, Department of Clinical Neurosciences, Neurology-Sleep Disorders Center, IRCCS San Raffaele Scientific Institute, Milan, Italy.

Article Synopsis
  • This study investigates how K-complexes (KC), a specific type of brainwave, relate to the effectiveness of Cognitive-Behavioral Therapy for Insomnia (CBT-I), which is the main treatment for chronic insomnia.
  • Researchers conducted a multicenter study with 98 insomnia patients undergoing a 6-8 week CBT-I program, evaluating their sleep using polysomnography and an insomnia severity index before and after treatment.
  • The results indicate that KC density, particularly its change after treatment, can predict how well patients respond to CBT-I and significantly correlates with improved sleep pressure, suggesting KC is an important biomarker for insomnia treatment.
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