Publications by authors named "P F Dijkstra"
Strong Anionic Fluorene Donor-Acceptor Copolyelectrolytes from Protected Hydrophobic Precursors.
Macromol Rapid Commun
January 2025
Conjugated polyelectrolytes (CPEs), materials that are defined by a -conjugated backbone and charged ionic functional groups, are frequently prepared through direct polymerization of charged monomer species in aqueous media. This route is, however, often accompanied by labor-intensive work-up procedures, low yields, and ultimately results in materials that are difficult to characterize. To overcome these inconveniences, in this work protection chemistry is applied on sulfonate-functionalized fluorene monomers that are polymerized under standard Suzuki polycondensation conditions to obtain protected donor-acceptor copolymers.
View Article and Find Full Text PDFObjectives: To analyse intraobserver and interobserver reliability of colour Doppler (CD) ultrasonography of the major salivary glands (SGUS) in patients clinically suspected of Sjögren's disease (SjD).
Methods: One hundred consecutive outpatients visiting the University Medical Center Groningen for a diagnostic trajectory because of a suspicion of SjD were evaluated using CD ultrasonography of the submandibular and parotid salivary glands. All images were independently assessed by four observers (two experienced observers, one lesser experienced resident, one inexperienced trainee) in two sessions using the Outcome Measures in Rheumatology (OMERACT) CD scoring system (scale 0-3).
Article Synopsis
- This study explores the views and experiences of individuals who have had major lower limb amputations due to blood circulation issues, focusing on their nutritional habits and challenges.
- Thirteen participants shared insights through interviews, leading to four key themes: food choices are influenced by non-health factors, there is a lack of understanding about nutrition's impact on health, support for nutrition mainly comes from personal networks rather than professionals, and there is minimal motivation to change eating habits.
- The study emphasizes the need for better awareness of healthy eating and suggests that personalized nutritional care, using motivational interviewing techniques, could enhance health outcomes for these individuals.
Article Synopsis
- Social stress can increase oxidative stress in the brain, potentially leading to mental health disorders, with previous studies showing that social hierarchies impact this stress.
- In a study of cichlid fish, researchers found that dominant males (who are territorial and reproductively active) had lower oxidative DNA damage in the midbrain and greater antioxidant capacity compared to subordinate males.
- The findings suggest that social status and reproductive activity influence oxidative balance in the brain, but the effects vary across different brain areas.
In females of the mouthbrooding cichlid fish , we recently found a positive relationship between liver antioxidant function and filial cannibalism. Here, we manipulated the level of fry consumption in females to assess how the level of fry consumption affects liver antioxidant function. Feeding treatment did not affect liver antioxidant function, but feeding treatment significantly influenced the relationship between gonadal development and antioxidant function.
View Article and Find Full Text PDF