Production and separation of positron emitters for hadron therapy at FRS-Cave M.

The FRagment Separator FRS at GSI is a versatile spectrometer and separator for experiments with relativistic in-flight separated short-lived exotic beams. One branch of the FRS is connected to the target hall where the bio-medical cave (Cave M) is located. Recently a joint activity between the experimental groups of the FRS and the biophysics at the GSI and Department of physics at LMU was started to perform biomedical experiments relevant for hadron therapy with positron emitting carbon and oxygen beams. This paper presents the new ion-optical mode and commissioning results of the FRS-Cave M branch where positron emitting 15O-ions were provided to the medical cave for the first time. An overall conversion efficiency of 2.9±0.2×10-4 15O fragments per primary 16O ion accelerated in the synchrotron SIS18 was reached.

Improving the Retrieval of Arabic Web Search Results Using Enhanced k-Means Clustering Algorithm.

Traditional information retrieval systems return a ranked list of results to a user's query. This list is often long, and the user cannot explore all the results retrieved. It is also ineffective for a highly ambiguous language such as Arabic. The modern writing style of Arabic excludes the diacritical marking, without which Arabic words become ambiguous. For a search query, the user has to skim over the document to infer if the word has the same meaning they are after, which is a time-consuming task. It is hoped that clustering the retrieved documents will collate documents into clear and meaningful groups. In this paper, we use an enhanced k-means clustering algorithm, which yields a faster clustering time than the regular k-means. The algorithm uses the distance calculated from previous iterations to minimize the number of distance calculations. We propose a system to cluster Arabic search results using the enhanced k-means algorithm, labeling each cluster with the most frequent word in the cluster. This system will help Arabic web users identify each cluster's topic and go directly to the required cluster. Experimentally, the enhanced k-means algorithm reduced the execution time by 60% for the stemmed dataset and 47% for the non-stemmed dataset when compared to the regular k-means, while slightly improving the purity.

Assessment of physicians knowledge and attitudes in the management of febrile seizures.

OBJECTIVE: To assess the knowledge and attitudes of physicians in different specialties who are involved in the care of children with FS. METHODS: We assessed knowledge and attitudes in the management of Febrile seizure (FS) among physicians working in different specialties in the Kingdom of Saudi Arabia using a questionnaire-based cross-sectional study conducted from September-December 2016. RESULTS: Of the 300 physicians who responded to the questionnaire, 178 (59.3%) were males, 119 (39.7%) were consultants, 92 (30.7%) were specialists, and 89 (29.7%) were residents. The majority were general pediatric consultants. Our study showed that the consultants were more aware of the definition of simple FS in comparison to other groups of physicians, and the difference was statistically significant. However, there was no difference between pediatric neurologists and general pediatricians. There was a statistically significant difference among various specialties in the perceived need to perform routine lumbar puncture, neuroimaging, and serum electrolyte determination in the evaluation of children with FS. On the other hand, there was no difference in the perceived need to perform an electroencephalogram among physicians in different specialties. CONCLUSION: The study highlighted the wide variation in knowledge and attitudes of physicians in different specialties with different levels of experience toward the management of FS. The use of clinical practice guidelines will help minimize this diversity.

The effect of topical 5-flurouracil application post endoscopic inferior turbinoplasty.

RATIONALE AND OBJECTIVES: Adhesions are the most common complication after nasal surgery and revision. 5-Fluorouracil (5-FU) reduces various adhesions and epithelial growth related complications. The aim of this study was to evaluate the effects of 5-flurouracil application in the nasal cavity after a multi-procedure nasal surgery in term of complications frequency. MATERIALS AND METHODOLOGY: Institutional ethical approval was granted and a double-blinded prospective clinical trial was conducted to study the effect of 5-fu on post-operative complications. At the end of a combined endoscopic inferior turbinoplasty with one or more other nasal surgeries, 5-flurouracil-soaked cottonoid with 1mL of 5-flurouracil (5mg/mL) was applied in one side of nasal cavity and saline-soaked cottonoid was applied contralaterally and left for 5min. Patients were assessed over 2months postoperatively by a blinded observer in terms of adhesions, crustation, discharge, pain, discharge, loss of smell and other complications and nasal symptoms. RESULTS: On the 1st follow up week postoperatively, adhesions were observed in (24 patients) 35%, bilateral in (6 patients) 9% and unilateral in (18 patients) 26%. Unilateral Adhesions were statistically significantly higher in control sides than those in 5-FU sides (22% vs 4% respectively) (p=0.025). Crustation, continued to statistically significantly diminish over time (p=0.035). On the 8th follow up week, adhesions reduction was still statistical significant at the 5-FU treated side (p=0.01). CONCLUSION: 5-FU is safe and effective in preventing adhesions formation when applied during combined endoscopic inferior turbinoplasty procedure with other nasal procedure surgery.

Cellulose-Acetate-Based Films Modified with Ag2O and ZnS as Nanocomposites for Highly Controlling Biological Behavior for Wound Healing Applications.

For wound healing, functional films with certain physicochemical and biological properties are needed. Thus, the current work aimed to fabricate multifunctional materials comprising metal oxide nanoparticles loaded with an efficient polymer to be used as dressing material. A composite containing polymeric phases of cellulose acetate (CA) blended with zinc sulfide (ZnS), silver oxide (Ag2O), and graphene oxide (GO) was successfully synthesized. The prepared composite crystallinity was studied using the X-ray diffraction technique (XRD). Further, the functional groups and the elemental analysis were investigated using Fourier-transform infrared spectroscopy (FTIR) and energy-dispersive X-ray spectroscopy (EDX). Furthermore, the surface morphology was studied using scanning electron microscopy (SEM) to obtain the shape and size of particles. SEM showed that the particles were formed in wide distribution in the range of 18-915 nm with an average size of 235 nm for Ag2O/ZnS/GO/CA. The particle size of Ag2O in the CA film was in the range between 19 and 648 nm with an average size of 216 nm, while the particle size of ZnS in CA was in the range of 12-991 nm with an average age particle size of 158 mm. In addition, EDX, based on SEM investigation, detected high carbon and oxygen quantities at around 94.21% of the composite. The contact angle decreased and reached 26.28° ± 2.12° in Ag2O/ZnS/CA. Furthermore, thermogravimetric analysis (TGA) was used to investigate the thermal stability, and the composition was thermally stable until 300 °C. Moreover, the cell viability of "normal lung cells" reached 102.66% in vitro at a concentration of 1250 µg/mL. The antibacterial activity of Ag2O/ZnS/GO/CA was also detected against E. coli with a zone of inhibition reaching 17.7 ± 0.5 mm. Therefore, the composite can be used in biomedical applications due to its biocompatibility and antibacterial activity.

Quality of Life of Primary Caregivers of Children With Cerebral Palsy From a Family Perspective.

BACKGROUND: Cerebral palsy is a heterogeneous group of permanent non-progressive disorders affecting the development of movement and posture, varying in severity, interfering with daily activity, and associated with multiple comorbidities. Previous studies in different regions of Saudi Arabia have shown links between caregivers' mental health and children's well-being. However, the lack of such research in the Tabuk region necessitates the development of a new survey to assess caregivers' quality of life in this specific area. METHODOLOGY: This was a cross-sectional study, conducted during 2022-2023. It included the caregivers of Saudi children with cerebral palsy in the Tabuk region. Data was collected using an online questionnaire and was analyzed using the SPSS program (IBM Corp., Armonk, NY). RESULTS: The study included 63 participants. Mothers (50.8%) and fathers (46.0%) were the primary caregivers. The comorbidities of cerebral palsy children like seizures (28.6%) and learning difficulties (19.0%) were prevalent for cerebral palsy children. Around 20.6% of participants received home health care. In terms of family quality of life, the majority expressed satisfaction with family interaction, parenting, and emotional well-being, although mixed feelings were observed. CONCLUSION: The majority of caregivers reported satisfaction in various domains of family quality of life, particularly in family interaction and parenting. However, a notable percentage expressed dissatisfaction in some areas, highlighting the complex emotional and practical challenges faced by these caregivers.

Impact of COVID-19 on the 937 Telephone Medical Consultation Service in Saudi Arabia.

The impact of COVID-19 on healthcare services has been profound. One major impact has been underutilization of traditional healthcare services by patients. In 2020, the Saudi Ministry of Health (MoH) started offering general COVID-19 enquiries, education, and medical and psychological consultations around the clock via their 937-Call Center. Given this major change, there was a need to understand the impact of the COVID-19 pandemic on Call Center services, specifically medical consultations, to suggest future recommendations for patient care optimization. This descriptive study analyzed routinely collected data on the 937-Call Center service between March 2020 and September 2020. Data were reviewed, coded, verified, and analyzed using SPSS v22. There was a 296% increase in the number of calls received by the 937-Call Center in 2020 compared to the same period in 2019. The majority of calls received in 2020 were general medical enquiries (98.41%), but about three million COVID-19-specific enquiries were also received in 2020. The increased number of calls was managed by accepting volunteers to handle calls: an average of 236 volunteers per month, handling about 20% of the total call volume. The majority of volunteers were physicians but with the presence of pharmacists, psychologists, and specialized healthcare workers such as nutritionists. Utilization of the 937-Call Center increased during the COVID-19 pandemic, suggesting that it has been an effective strategy for combatting the COVID-19 pandemic in Saudi Arabia. Further research is recommended to investigate the impact of COVID-19 on public awareness of the 937-Call Center and other health-related mobile apps.

Exposure to Bisphenol A Substitutes, Bisphenol S and Bisphenol F, and Its Association with Developing Obesity and Diabetes Mellitus: A Narrative Review.

Bisphenol A, a well-known endocrine-disrupting chemical, has been replaced with its analogs bisphenol S (BPS) and bisphenol F (BPF) over the last decade due to health concerns. BPS and BPF are present in relatively high concentrations in different products, such as food products, personal care products, and sales receipts. Both BPS and BPF have similar structural and chemical properties to BPA; therefore, considerable scientific efforts have investigated the safety of their exposure. In this review, we summarize the findings of relevant epidemiological studies investigating the association between urinary concentrations of BPS and/or BPF with the incidence of obesity or diabetes. The results showed that BPS and BPF were detected in many urinary samples at median concentrations ranging from 0.03 to 0.4 µg·L-1. At this exposure level, BPS median urinary concentrations (0.4 µg·L-1) were associated with the development of obesity. At a lower exposure level (0.1-0.03 µg·L-1), two studies showed an association with developing diabetes. For BPF exposure, only one study showed an association with obesity. However, most of the reported studies only assessed BPS exposure levels. Furthermore, we also summarize the findings of experimental studies in vivo and in vitro regarding our aim; results support the possible obesogenic effects/metabolic disorders mediated by BPS and/or BPF exposure. Unexpectedly, BPS may promote worse obesogenic effects than BPA. In addition, the possible mode of action underlying the obesogenic effects of BPS might be attributed to various pathophysiological mechanisms, including estrogenic or androgenic activities, alterations in the gene expression of critical adipogenesis-related markers, and induction of oxidative stress and an inflammatory state. Furthermore, susceptibility to the adverse effects of BPS may be altered by sex differences according to the results of both epidemiological and experimental studies. However, the possible mode of action underlying these sex differences is still unclear. In conclusion, exposure to BPS or BPF may promote the development of obesity and diabetes. Future approaches are highly needed to assess the safety of BPS and BPF regarding their potential effects in promoting metabolic disturbances. Other studies in different populations and settings are highly suggested.

Trapezius or facial muscles: Which one is more suitable for the measurement of stress using sEMG signals?

A number of techniques have been reported to detect mental stress. Surface Electromyography (sEMG) has also been used to measure stress by acquiring the signals from various sites of the human body, however, consensus need to be established to determine the best possible site to harvest stress related information. In this study, work related mental stress using sEMG signals acquired from trapezius muscle and facial muscles were compared. BIOPAC signal acquisition system was used to acquire sEMG signals simultaneously from both trapezius and facial muscles from forty five (45) healthy volunteers. Stress was induced using different standard methods in a controlled environment. Statistical significant difference was found between the stress and rest levels of sEMG signals. The statistical test also showed that the upper trapezius muscle was a better stress detection site as compared to facial muscles.Clinical Relevance- Optimized stress detection can help in the prevention of the possible stress related physical disorders.

Cerebrolysin prevents sleep deprivation induced memory impairment and oxidative stress.

Sleep plays a critical role in body health maintenance and well-being throughout a lifetime. Sleeplessness is the most prevalent feature in the modernist societies, which impairs memory. Studies have shown a strong correlation between sleep deprivation and memory impairment in humans and animals, which is related to oxidative stress induced damage within the brain. Cerebrolysin (CBL) is a neuropeptide that is used to treat vascular dementia. In this study, the effect of CBL on sleep-deprivation induced memory impairment was investigated. Sleep deprivation was induced in rats using the modified multiple platform model (8 h/day for 4 weeks). Concurrently, CBL was administered intraperitoneally for four weeks. Animal's performance (spatial learning and memory) was assessed using the radial arm water maze (RAWM). Additionally, oxidative stress biomarkers including reduced glutathione (GSH), oxidized Glutathione (GSSG), GSH/GSSG ratio, glutathione peroxidase (GPx), and catalase were assessed in the hippocampus. Current results showed that sleep deprivation impaired both short- and long- term memories (P < 0.05), and that chronic CBL administration prevented such impairment. Additionally, CBL prevented decreases in hippocampal GPx, catalase, GSH and GSH/GSSG ratio and normalized increases in GSSG levels, which were impaired by the sleep deprivation model (P < 0.05). In conclusion, result showed a protective effect for CBL administration against sleep-deprivation induced memory impairment, which could be related to CBL induced prevention of oxidative stress in the hippocampus.

The protective effect of edaravone on memory impairment induced by chronic sleep deprivation.

Sleep plays a critical role in body health maintenance, whereas sleep deprivation (SD) negatively affects cognitive function. Cognitive defects mainly memory impairment resulting from sleep deprivation were related to an increase in the level of oxidative stress in the body, including the brain hippocampus region. Edaravone is a potent free radical scavenger having antioxidant effect. In the current study, edaravone's ability to prevent SD induced cognitive impairment was tested in rats. Animals were sleep deprived 8 h/day for 4 weeks. Concurrently, edaravone was administrated intraperitoneally for four weeks. Animals performance during cognitive testing was evaluated to display if edaravone has a role in the prevention of sleep deprivation induced memory impairment. Additionally, the role of antioxidant biomarkers glutathione peroxidase (GPx), catalase, glutathione (GSH), oxidized glutathione (GSSG), GSH/GSSG in this effect was investigated. The results showed that SD impaired both short- and long- term memories, and chronic edaravone administration prevented such effect. Additionally, edaravone prevented decreases in hippocampal GPx, catalase, GSH/GSSG ratio and normalized increases in GSSG levels, which were impaired by SD model. In conclusion, current result showed a protective effect of edaravone administration against SD induction that could be related to edaravone's ability to normalizing mechanisms related to oxidative balance.

Late Presentation of Aggressive Fibromatosis Involving Head, Neck and Chest Wall.

Fibromatosis is a rare, benign, slow-growing and locally infiltrative tumour, caused by uncontrolled proliferation of fibrous tissue arising from muscles, connective tissue, fasciae and aponeurosis. It is also called desmoid tumour, which is very rare pathology representing only 0.03% of all neoplasms in human and around 3% of all soft tissue tumours. It is locally aggressive and usually invades the surrounding structures and has a high recurrence rate, even after surgical complete resection, which should be the first line of treatment. Here, we report a very rare case of extensive and disabling fibromatosis tumour in a 38-year male, involving three compartments of the right side of the head, neck and chest wall, which was completely excised surgically and had excellent postoperative results with no morbidity.

Communication : A SIMPLE METHOD FOR THE DETERMINATIONOF CHLORPROMAZINE IN PHARMACEUTICALPREPARATIONS AND BLOOD SERUM.

A simple rapid and accurate method is described for the analysis of chlorpromazine. The method utilises reverse phase HPLC with a methanol: water system 50:50 as mobile phase and UV detection. The same has been successfully applied on locally available pharmaceutical preparations and in blood serum after drug administration.