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Relationships between solid dispersion preparation process, particle size and drug release - An NMR and NMR microimaging study

Solid dispersion tablets prepared by either spray drying or rotoevaporation and exhibiting different grain and pore sizes were investigated under the process of hydration-swelling-gelation. 2H and 1H NMR microimaging experiments were used to selectively follow water penetration and polymer mobilization kinetics, respectively, while the drug release kinetics was followed by 1H NMR spectroscopy. The

Polymer-drug interactions and wetting of solid dispersions

We demonstrate the ability of drugs to influence the wetting of solid dispersion tablets in unexpected ways. Five model drugs of different water solubility and ability to interact with the involved polymers were incorporated in hydrophilic polymer matrices, made of either hydroxypropyl methylcellulose (HPMC) or polyvinyl pyrrolidone (PVP). The physical mixtures of all combinations of drug and poly

Approaches to encapsulation of active food ingredients in spray-drying

Microencapsulation can be used to improve the stability and control the release of dried active food ingredients such as flavors, enzymes, probioticas and oxidation sensitive oils. Spray-drying can be used for encapsulation and powder generation in one step by utilizing different phenomena that occur during drying. Dry emulsion is a classic way to supply encapsulated flavors and protect oxidation

Adsorption of pharmaceutical excipients onto microcrystals of siramesine hydrochloride : Effects on physicochemical properties

A common challenge in the development of new drug substances is poor dissolution characteristics caused by low aqueous solubility. In this study, microcrystals with optimized physicochemical properties were prepared by precipitation in the presence of excipients, which adsorbed to the particle surface and altered particle size, morphology, and dissolution rate. The poorly water-soluble drug sirame

Surface composition and contact angle relationships for differently prepared solid dispersions

Solid dispersions are promising drug delivery forms which offer the possibility to disperse a hydrophobic drug in a hydrophilic matrix and thereby improve the dissolution behavior and the bioavailability of the drug. One important aspect and a prerequisite in understanding the drug dissolution mechanism from solid dispersions is a better analytical monitoring of the solid dispersion surface proper

Polymer mobilization and drug release during tablet swelling. A 1H NMR and NMR microimaging study

The objective of this study was to investigate the swelling characteristics of a hydroxypropyl methylcellulose (HPMC) matrix incorporating the hydrophilic drug antipyrine. We have used this matrix to introduce a novel analytical method, which allows us to obtain within one experimental setup information about the molecular processes of the polymer carrier and its impact on drug release. Nuclear ma

A Randomized, Placebo-Controlled, Single-Center, Crossover Study to Evaluate the Effects of Pre-Meal Whey Protein Microgel on Post-Prandial Glucometabolic and Amino Acid Response in People with Type 2 Diabetes and Overweight or Obesity

Purpose: Whey protein (WP) consumption prior to a meal curbs appetite and reduces postprandial glucose (PPG) through stimulating endogenous GLP-1 secretion and insulin. Methods: We assessed the metabolic effects of a concentrated WP, using a new micelle-technology (WPM), in people with type 2 diabetes (T2D) and overweight or obesity (NCT04639726). In a randomized-crossover design, participants per

Advanced electrocardiography heart age : a prognostic, explainable machine learning approach applicable to sinus and non-sinus rhythms

Aims: An explainable advanced electrocardiography (A-ECG) Heart Age gap is the difference between A-ECG Heart Age and chronological age. This gap is an estimate of accelerated cardiovascular aging expressed in years of healthy human aging, and can intuitively communicate cardiovascular risk to the general population. However, existing A-ECG Heart Age requires sinus rhythm. We aim to develop and pr

The Role of Glial Cells in the Pathophysiology of Epilepsy

Epilepsy is a chronic neurological disorder marked by recurrent seizures, significantly impacting individuals worldwide. Current treatments are often ineffective for a third of patients and can cause severe side effects, necessitating new therapeutic approaches. Glial cells, particularly astrocytes, microglia, and oligodendrocytes, are emerging as crucial targets in epilepsy management. Astrocytes

Dose-Response Relationship of Phloretin Therapy on Water and Glucose Transport during Experimental Peritoneal Dialysis

Background Water retention, ultrafiltration insufficiency, and metabolic complications due to abnormally high glucose concentrations are still common problems in patients treated with peritoneal dialysis. Phloretin, a nonselective inhibitor of facilitative glucose transporter channels (GLUT), has shown to improve water transport and lower glucose absorption in experimental peritoneal dialysis. How

Beyond Survival : Unveiling Psychological and Social Adaptation After Visceral Transplantation

Aim: To explore the meaning of adaptation after visceral transplantation in terms of patient experiences, symptoms, self-efficacy, transplant-specific and mental well-being. Design: A convergent parallel mixed-methods study, consisting of interviews and generic as well as transplant-specific questionnaires. Results were integrated using meta-inference. Methods: The study comprises a population of

Continuous feedback protocols for cooling and trapping a quantum harmonic oscillator

Quantum technologies and experiments often require preparing systems in low-temperature states. Here we investigate cooling schemes using feedback protocols modeled with a quantum Fokker-Planck master equation (QFPME) recently derived by Annby-Andersson et al. [Phys. Rev. Lett. 129, 050401 (2022)0031-900710.1103/PhysRevLett.129.050401]. This equation describes systems under continuous weak measure

TOI-2458 b : A mini-Neptune consistent with in situ hot Jupiter formation

We report on the discovery and spectroscopic confirmation of TOI-2458 b, a transiting mini-Neptune around an F-type star leaving the main-sequence with a mass of M∗ = 1.05 ± 0.03 M⊙, a radius of R∗ = 1.31 ± 0.03 R⊙, an effective temperature of Teff = 6005 ± 50 K, and a metallicity of 0.10 ± 0.05 dex. By combining TESS photometry with high-resolution spectra acquired with the HARPS spectrograph, we

Sveriges regionala dynamik. Historiska trender och framtidens utmaningar

Regionalekonomiska skillnader och varierad befolkningsutvecklinghar under lång tid präglat Sveriges samhällsdynamik. Genom enhistoriskanalys från 1860-talet och framåt visar denna rapport hurregional ojämlikhet i Sverige tidvis har ökat och tidvis har minskat.Den ekonomiska tillväxten har sedan 1980 främst gynnat större regioneri ekonomisk- och befolkningsbemärkelse, medan mindre områdenhalkat eft

Association of Pulmonary Involvement at Baseline with Exercise Intolerance and Worse Physical Functioning 8 Months Following COVID-19 Pneumonia

Objectives: We aimed to describe the cardiopulmonary function during exercise and the health-related quality of life (HRQoL) in patients with a history of COVID-19 pneumonia, stratified by chest computed tomography (CT) findings at baseline. Methods: Among 77 consecutive patients with COVID-19 who were discharged from the Pulmonology Ward between March 2020 and April 2021, 28 (mean age 54.3 ± 8.6

Vocal Communication in Domestic Cats

This article describes the phonetic characteristics of the most common vocalisation types and subtypes in the domestic cat: the meow, the trill, the howl, the growl, the hiss (and the spit), the snarl (and the cry), the purr, the chirp and the chatter. In addition, the contexts where the different sounds are normally produced, and accompanying body postures and movements are summarised. Acoustic dThis article describes the phonetic characteristics of the most common vocalisation types and subtypes in the domestic cat: the meow, the trill, the howl, the growl, the hiss (and the spit), the snarl (and the cry), the purr, the chirp and the chatter. In addition, the contexts where the different sounds are normally produced, and accompanying body postures and movements are summarised. Acoustic d

Modeling Sporadic Progressive Supranuclear Palsy in 3D Midbrain Organoids : Recapitulating Disease Features for In Vitro Diagnosis and Drug Discovery

Objective: Progressive Supranuclear Palsy (PSP) is a severe neurodegenerative disease characterized by tangles of hyperphosphorylated tau protein and tufted astrocytes. Developing treatments for PSP is challenging due to the lack of disease models reproducing its key pathological features. This study aimed to model sporadic PSP-Richardson's syndrome (PSP-RS) using multi-donor midbrain organoids (M

Retrenchment without liberalisation: Making Sense of Sweden's Shift Away from Consensual and Evidence-Based Politics

Fifteen years ago, Bergh and Erlingsson (2009) argued that Sweden's period from 1980 to 2000 was characterised by ‘liberalisation without retrenchment’. This resulted from pragmatic policymaking, a consensus-building governmental inquiry system and close links between policymakers and academics. We use new data to confirm that total tax revenue and economic freedom increased in Sweden during the 1