765 results match your criteria: "Sofia University "St. Kliment[Affiliation]"

Ladder oligomers containing calixarene skeletons in the main chain-calix[4]resorcinarene (CRA) ladder macromolecules with open chain and cyclic macromolecules with double ring-like (Noria-type) topologies-bring particular research attention as functional materials with various applications. However, there is still a remarkable lack of studies into the synthesis of fully water-soluble derivatives of these interesting macromolecules. Research on this topic would allow their bio-based research and application niche to be at least revealed.

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  • Researchers synthesized N-modified versions of VV-hemorphin-5 and paired them with different naphthalimides to create colorimetric and antimicrobial properties in cotton fabric.
  • The study found that immobilizing these peptides on fabric affects their flexibility and reduces their antimicrobial effectiveness, which is essential for bacterial contact.
  • Among the tested peptides, the one with a nitro-substituent showed slightly better antibacterial activity, indicating potential for using treated cotton in medical applications like antibacterial dressings.
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Silica-poly (vinylpyrrolidone) hybrid material was prepared using the sol-gel method. Tetramethyl ortosilane (TMOS) was used as a silica precursor. XRD analysis established that the as-prepared material is amorphous.

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Zinc oxide nanoparticles are safe, non-toxic, and biocompatible. These NPs are used in food packaging materials, self-cleaning glass, ceramics, deodorants, sunscreens, paints, coatings, ointments, lotions, and as preservatives. This study explored the biological potential of ZnO nanoparticles synthesized using .

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Gestational diabetes mellitus (GDM) is considered the most common metabolic disorder of the pregnancy period. It is characterized by pancreatic beta-cell dysfunction in the setting of chronic insulin resistance. Zinc is a nutrient involved in numerous metabolic processes and shows a relationship with glycometabolic disorders and GDM.

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Monensic acid is a natural polyether ionophore and is a therapeutic of first choice in veterinary medicine for the control of coccidiosis. Although known as a sodium-binding ligand, it can also form a variety of coordination species depending on experimental conditions applied. In this study, we present the crystal structures and properties of Co(II) and Mn(II) complexes of sodium monensinate (MonNa) derived from the reaction of MonNa with cobalt or manganese dinitrates.

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We present the case of a 73-year-old woman with coronary artery-left ventricular multiple microfistulae, who was admitted with symptoms and ECG suggestive of coronary artery disease. Coronary angiography revealed tortuous coronary arteries with multiple microfistulae between the left coronary artery and the left ventricle, as well as between the right coronary artery and the left ventricle. Transthoracic echocardiography (TTE) was also able to clearly demonstrate the presence of the microfistulae with their direction of blood flow towards the left ventricle.

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Despite advancements in the field, early diagnosis of multiple endocrine neoplasia type 1 (MEN1) remains unachievable. This letter to the editor highlighted the importance of carefully assessing gastrointestinal symptoms, hypercalcemia, and elevated serum gastrin levels, as suggested by Yuan in their paper. They focused on a patient with recurrent abdominal pain and diarrhea whose diagnostic path led to establishing a MEN1 diagnosis within a year.

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It is well known that perception and cognition are systematically biased towards the recent past. That is, a decision about the current state of a perceptual feature (e.g.

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Recent studies have discovered that aryl-substituted pyrido[2,1-a]isoquinolines have the potential to be highly active DPP IV inhibitors. In previous studies, we reported a novel synthetic approach for the construction of their sulfur-containing bioisosteric [1,4]thiazino[3,4-a]isoquinolines analogues, incorporating an additional aryl substituent. The present study aims to investigate the DPP IV inhibitory activity and cytotoxicity of the synthesized molecules by in vitro assay.

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Background: Breast cancer morbidity has been increasing worldwide, but treatments are improving. The therapeutic response depends on the stage at which the disease is diagnosed. Therefore, early diagnosis has never been more essential for successful treatment and a reduction in mortality rates.

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Coronary artery disease (CAD) presents a significant risk for patients with systemic vasculitides, a group of disorders characterized by the inflammation of blood vessels. In this review, we focus on the pathophysiological mechanisms, complications, and management strategies for CAD in systemic vasculitides. We highlight how the inflammatory processes inherent in vasculitis contribute to accelerated atherosclerosis and myocardial ischemia.

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A hydropneumothorax is an uncommon complication of pneumonia, particularly in pediatric patients, and typically arises secondary to conditions such as malignancies, esophageal-pleural fistula, thoracic trauma, or thoracocentesis. While pneumothorax is rarely reported in adults with COVID-19 and is even less common in children, isolated cases have been noted in those with Multisystem Inflammatory Syndrome in Children (MIS-C). A recent alert has also been issued about increased Group A Streptococcus (GAS) infections in Europe.

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Cyclodextrins (CDs) are host systems with inherent capability for inclusion complex formation with various molecular entities, mostly hydrophobic substances. Host CDs are highly accommodative to water molecules as well and usually contain water in the native state. There is still an ongoing discussion on both the total number of water molecules and their preferred binding position inside the cavities of the CDs.

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With the help of a microscopic model and Green's function technique, we studied the multiferroic and phonon properties of the recently reported new multiferroic PrFeAlO (PFAO) compound, which belongs to the double perovskite ABB'O family. The magnetization decreases with the increase in temperature and disappears at the ferromagnetic Curie temperature TCFM. The polarization increases with the application of an external magnetic field, indicating strong magnetoelectric coupling and confirming the multiferroic behavior of PFAO.

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  • The study explored how the Antarctic yeast strain Sporobolomyces roseus AL reacts to temperature changes, focusing on its biosynthesis and the properties of the exopolysaccharide (EPS) it produces.
  • Results indicated that the yeast grew faster at 22°C than at 5°C, with notable differences in its metabolic profile, including various sugars and amino acids.
  • The EPS produced was characterized by significant amounts of carbohydrates and proteins, showed thermal stability, and has potential applications in packaging materials due to its film-forming properties.
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  • - The case study investigates plastic pollution along the Bulgarian Black Sea coast by assessing the density of marine litter and using the Pollution Load Index to understand its impact.
  • - It identifies major contributors to plastic pollution, such as rivers and urban areas, particularly highlighting Varna, Bourgas, and the Kamchia River, along with transboundary sources from the Danube.
  • - The OpenDrift Lagrangian model effectively tracks the movement and distribution patterns of plastic litter, confirming its accuracy through validation with field data.
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  • * Recent efforts to stop smoking haven't been put into action yet, and it’s important to see what could happen if smoking rates stay the same or improve.
  • * Researchers used models to predict health outcomes by 2050 based on different scenarios of smoking rates, showing that cutting smoking could greatly improve health and life expectancy.
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Trigeminal neuralgia (TN), characterized by recurrent episodes of intense facial pain, poses diagnostic and therapeutic challenges. TN can be triggered by many factors, with rare cases (< 0.05% of the general population) associated with vertebrobasilar dolichoectasia (VBD).

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Among a variety of diverse host molecules distinguished by specific characteristics, the cucurbit[n]uril (CB) family stands out, being widely known for the attractive properties of its representatives along with their increasingly expanding area of applications. The presented herewith density functional theory (DFT)-based study is inspired by some recent studies exploring CBs as a key component in multifunctional hydrogels with applications in materials science, thus considering CB-assisted supramolecular polymeric hydrogels (CB-SPHs), a new class of 3D cross-linked polymer materials. The research systematically investigates the inclusion process between the most applied representative of the cavitand family CB[7] and a series of laser dye molecules as guests, as well as the possible encapsulation of a model side chain from the photoanisotropic polymer PAZO and its sodium-containing salt.

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During the last few decades, the main focus of numerous studies has been on the human breast milk microbiota and its influence on the infant intestinal microbiota and overall health. The presence of lactic acid bacteria in breast milk affects both the quantitative and qualitative composition of the infant gut microbiota. The aim of this study was to assess the most frequently detected cultivable rod-shaped lactobacilli, specific for breast milk of healthy Bulgarian women and fecal samples of their infants over the first month of life, in 14 mother-infant tandem pairs.

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Herein, we present an elegant and simple method for significant improvement of eugenol water solubility using the polymers Soluplus and Lutrol F 127 as carriers and spray drying as an encapsulation method. The formulations were optimized by adding -inositol-a sweetening agent-and Aerosil 200 (colloidal, fumed silica)-an anticaking agent. The highest encapsulation efficiency of 97.

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Sarcoglycanopathies are among the most frequent and severe forms of autosomal recessive forms of limb-girdle muscular dystrophies (LGMDs) with childhood onset. Four subtypes are known: LGMDR3, LGMDR4, LGMDR5 and LGMDR6, which are caused, respectively, by mutations in the , SGCB, and genes. We present the clinical variability of LGMD 2C/R5 among a genetically homogeneous group of 57 patients, belonging to 35 pedigrees.

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In a first theoretical investigation of the multiferroic properties of Pb5Fe3F19 (PFF) and Pb5Cr3F19 (PCF), we analyze their magnetic, ferroelectric, and dielectric characteristics as functions of temperature, magnetic field, and ion doping concentration using a microscopic model and Green's function theory. The temperature-dependent polarization in PFF and PCF shows a distinctive kink at the magnetic Neel temperature TN, which vanishes when an external magnetic field is applied, indicating the multiferroic behavior of these two compounds. Ion doping effectively tunes the properties of PFF and PCF.

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During the COVID-19 pandemic, the term "behavioural fatigue" became the centre of policy debates in Great Britain. These debates involved deciding when to go into lockdown and whether behavioural interventions could be effective. Behavioural interventions can only succeed where people's Capabilities, Opportunities, and Motivations to perform target behaviours are supported.

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