Time-Temperature Superposition of the Dissolution of Wool Yarns in the Ionic Liquid 1-Ethyl-3-methylimidazolium Acetate.

The dissolution of wool yarns in the ionic liquid 1-ethyl-3-methyl-imidazolium acetate [C2mim][OAc] has been investigated. Wool yarns were submerged into [C2mim][OAc] and dissolved for various times and temperatures before coagulating with water. Optical microscopy was used to track the yarn's cross-sectional area. We propose that there are two competing dissolution processes, one rate-limited by disulfide bonds at low temperatures (LTs), and a second by hydrogen bonds at high temperatures (HTs), with a crossover point between the two regimes at 70 ℃. The corresponding activation energies were ELT = 127 ± 9 kJ/mol and EHT = 34 ± 1 kJ/mol. The remaining area of the dissolved wool yarn could be shifted via time-temperature superposition to plot a single master curve of area against time for both regions. Finally, the dissolution could be modelled by a diffusion process, giving self-diffusion coefficients for the [C2mim][OAc] ions (0.64-15.31 × 10-13 m2/s).

A Decade's Perspective on the Orthopedic Workforce in Saudi Arabia.

Background The orthopedic surgery workforce constitutes a vital role in the healthcare system, with data being scarce. Therefore, through this study, we share an overview of the orthopedic workforce distribution, demographic trends, and changes over the past decade in Saudi Arabia. Methods All practicing orthopedic surgeons in Saudi Arabia from January 1, 2010, to December 31, 2021, were included in the study. Data regarding orthopedic surgeons' demographics and numbers were obtained from the Saudi Commission for Health Specialties (SCFHS), whereas the data related to the geographical distribution of orthopedic surgeons was obtained from the Ministry of Health Statistical Yearbook of 2020. Results The ratio of orthopedic surgeons per 100,000 people was 5.42 in 2010, which grew subsequently to 12.29 in 2021. The number of Saudi orthopedic surgeons has been noticeably rising through the years, while a slowly growing pattern can be seen among non-Saudi orthopedic surgeons. In addition, the highest ratios of orthopedic surgeons per 100,000 were in Makkah (1.72), Riyadh (1.26), and the Eastern Region (1.06). Conclusion In this study, we demonstrate the progress of the orthopedic workforce in Saudi Arabia over a period of 12 years. The number of orthopedic surgeons per 100,000 people showed a significant rise due to several factors, one of which is road traffic accidents. Also, although the number of female orthopedic surgeons has been rising lately, they are still much fewer than males in this field. In addition, Saudi Arabia has been developing a new healthcare system via the privatization of some of the governmental hospitals, which will lead to changes in the future workforce and its accommodations.

Awareness among Pregnant Women about Epidural Analgesia: A Cross-Sectional Study.

Background: Epidural analgesia (EPA) is an effective anesthetic technique to overcome pain during labor. This study aimed to evaluate the current awareness of EPA among pregnant women. Methods: We carried out a cross-sectional study using a questionnaire to measure awareness about EPA among pregnant women visiting the obstetrics and gynaecology clinic in King Abdulaziz Medical City in Jeddah. Following the results, a group of women was selected and educated by trained medical students. Results: This study comprised 105 women. We found that 25 (23.8%) respondents revealed a complete lack of knowledge regarding EPA, 63 (60%) showed minimal awareness, and 17 (16.2%) were aware of EPA from various sources. The gravidity and history of EPA administration were significantly associated with knowledge. Multigravida women and those who had received EPA showed higher level of knowledge (p=0.048 and p < 0.001, respectively). In addition, there was a significant association between the level of education and request for EPA (p=0.027). Forty-one participants were enrolled in an educational program that explained the importance of EPA. Twenty (48.8%) women decided to undergo EPA during delivery; however, 7 (17.7%) refused and 14 (34.1%) were not sure about their decision. Conclusion: This study revealed a lack of awareness about EPA among pregnant women. Educational programs were effective as many participants chose EPA following the educational session as a form of pain relief during labor. We recommend the implementation of routine education on EPA in vaginal delivery during antenatal visits for all pregnant women.

Acceptance and barriers of COVID-19 vaccination among people with chronic diseases in Saudi Arabia.

INTRODUCTION: Coronavirus Disease 2019 is a life-threatening disease, especially for people suffering from chronic diseases. As the vaccine is considered an essential tool to confront pandemics, many international medical institutions have developed vaccines. Countries around the world started immunizing their citizens. This study aims to assess the acceptance and barriers of COVID-19 vaccine uptake among Saudi Arabian people who suffer from chronic diseases. METHODOLOGY: In February-March 2021, a cross-sectional study of Saudi Arabian people who have chronic diseases was undertaken. It was based on an Arabic self-administered online questionnaire and used a convenience sampling technique. 310 people were invited. The response rate was 97%. RESULTS: 51.95% of the participants agreed to take the COVID-19 vaccine, 33.5% were unsure about being vaccinated, and 14.5% refused. The most frequent concerns between participants and receiving the vaccine were about the side effects and the perceived misconception that following preventative measures is enough to protect against the virus. Significant associations between age, education, and occupation with acceptance rate were found (p < 0.05). CONCLUSIONS: Although a higher acceptance for the targeted group was expected, the participants showed a moderate acceptance of the COVID-19 vaccine. Addressing the barriers in the current study regarding vaccine uptake and focusing on building trust in the safety and efficacy of the vaccine will aid in hesitancy and resistance toward the vaccine, specifically if these measures were undertaken by an authority such as the Saudi Ministry of Health.

Knowledge, barriers and uptake of influenza vaccine among non-health college students at Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia.

Background: Viral influenza, one of the global public health problems is specifically important in Saudi Arabia due to high susceptibility of transmission in hajj and umrah seasons (Islamic pilgrimage to the Mecca), as it has the ability to spread widely to a large proportion, in addition the disease has a higher rate of complications that might lead to death. Vaccination is an important strategy in prevention of viral influenza. Design and methods: The study aimed to describe the association between uptake of influenza vaccine with knowledge as well as identify the barriers that prevent vaccination among Princess Nourah Bint Abdulrahman University (PNU) non-health colleges students. A descriptive cross-sectional study design was undertaken, including 385 students from non-health colleges using a convenience sampling technique. Data was collected using an Arabic self-administered online questionnaire Analysis done by JMP program. IRB approval as well as informed consent were taken. Results: The uptake of the influenza vaccine was 15.3% in the current year and 56.8% in the previous years. No significant association was found between knowledge, and uptake of the vaccine. For the unvaccinated students, the most common encounter barriers stated by study population were concerns regarding the vaccine effectiveness, reduction of immunity the uncertainty of complete protection in a percentage of 12.0% for all. Conclusions: Although the level of vaccine uptake is low for this year, it is not associated with knowledge. There were some barriers that need to be tackled by health education programs.