High-resolution magnetic resonance imaging and diffusion tensor imaging of the porcine temporomandibular joint disc

This is the published version. Copyright © 2014 The British Institute of RadiologyObjectives: Diffusion tensor imaging (DTI) is an MRI modality for characterizing the property, microstructural organization and function in tissues such as the brain and spinal cord. Prior to this investigation, DTI had not been adapted for studies of the temporomandibular joint (TMJ) disc. Objectives were to test the feasibility of DTI to evaluate the porcine TMJ disc and to use DTI to observe differences in magnitude of anisotropy of water diffusion between TMJ disc regions. Methods: Five adult pig TMJs were scanned on a 9.4 Tesla horizontal bore MRI scanner using an inductively coupled surface coil. High-resolution gradient-echo and diffusion-weighted spin-echo based images were obtained. The mean diffusivity and fractional anisotropy (FA) were computed in different regions of the disc. Two observers were calibrated to review the two-dimensional and three-dimensional images. Polarized light microscopy was used as the gold standard for collagen fibre orientation. Results: In the sagittal plane, the mean diffusivity was higher in the posterior (1.28±0.10×10−3 mm−2 s−1) and anterior (1.27±0.08×10−3 mm−2 s−1) bands compared with the intermediate zone (0.96±0.01×10−3 mm−2 s−1), and the FA index was also lowest in the intermediate zone. In the coronal plane, the mean diffusivity was higher in the medial (1.42±0.01×10−3 mm−2 s−1) and lateral (1.21±0.12×10−3 mm−2 s−1) aspects than in the centre (1.09±0.08×10−3 mm−2 s−1), and the FA index was also lowest in the centre. Conclusions: DTI is a useful method for non-invasively characterizing the structure/property relationships of the porcine TMJ disc

Cardiac dysfunction in the diabetic rat: quantitative evaluation using high resolution magnetic resonance imaging

BACKGROUND: Diabetes is a major risk factor for cardiovascular disease. In particular, type 1 diabetes compromises the cardiac function of individuals at a relatively early age due to the protracted course of abnormal glucose homeostasis. The functional abnormalities of diabetic myocardium have been attributed to the pathological changes of diabetic cardiomyopathy. METHODS: In this study, we used high field magnetic resonance imaging (MRI) to evaluate the left ventricular functional characteristics of streptozotocin treated diabetic Sprague-Dawley rats (8 weeks disease duration) in comparison with age/sex matched controls. RESULTS: Our analyses of EKG gated cardiac MRI scans of the left ventricle showed a 28% decrease in the end-diastolic volume and 10% increase in the end-systolic volume of diabetic hearts compared to controls. Mean stroke volume and ejection fraction in diabetic rats were decreased (48% and 28%, respectively) compared to controls. Further, dV/dt changes were suggestive of phase sensitive differences in left ventricular kinetics across the cardiac cycle between diabetic and control rats. CONCLUSION: Thus, the MRI analyses of diabetic left ventricle suggest impairment of diastolic and systolic hemodynamics in this rat model of diabetic cardiomyopathy. Our studies also show that in vivo MRI could be used in the evaluation of cardiac dysfunction in this rat model of type 1 diabetes

The psychological properties of the Arabic BDI-II and the psychological state of the general Moroccan population during the mandatory quarantine due to the COVID-19 pandemic

The main objective of this work is to study the psychological impact (stress and depression) of the mandatory quarantine applied on the Moroccan population in order to limit the spread of the new coronavirus (COVID-19), then the study of the psychometric properties of the Arab BDI-II in the general Moroccan population. 263 respondents were asked to respond to a BDI-II and PSS-10 socio-demographic questionnaire conducted during the first month of quarantine. 55.9% of the respondents were in a normal state of stress and 36.1% in a moderate state. However, 38.4% and 27.8% exhibited minimal and severe depression respectively. The results of factor analysis with the varimax rotation method revealed three factors predicting 55.56% of the total variance of BDI-II, while two factors predicting 60.97% of the total variance of PSS-10. Cronbach's alpha values for BDI and PSS-10 were α = 0.93 and α = 0.58 respectively. In conclusion, the BDI-II is a reliable and valid assessment for measuring symptoms of depression in the general Moroccan population and also very important to pay more attention to the side effects of mandatory quarantine

Assessing Syrian women's knowledge of breast cancer risk factors, warning signs, and barriers to preventive measures: A cross-sectional study

Background: This study aims to investigate the knowledge of Syrian women about breast cancer risk factors, warning signals, and barriers. Breast cancer is the most common cancer worldwide and the leading cause of cancer death among women. It develops when cells in the breast tissue grow uncontrollably, forming a tumor that can spread to other parts of the body. Materials and Methods: This survey was conducted online from September 3 to September 27, 2022, and focused on Syrian women over the age of 18. It was divided into two sections, one focusing on sociodemographic characteristics and the other on breast cancer risk factors, warning signals, and barriers. Results: This study found that the majority of the 1305 participants had inadequate knowledge of breast cancer risk factors, warning signs, and barriers. Those with higher levels of education, such as Ph.D. students, had the highest overall scores. The sample was mostly made up of housewives, married women, and women with moderate monthly incomes. Conclusion: This research found that Syrian women have inadequate knowledge about breast cancer, including risk factors, warning signs, and barriers. To reduce mortality rates, increase survival rates, and improve early diagnosis, local health organizations should provide awareness courses to emphasize the importance of annual breast exams

Knowledge toward ovarian cancer symptoms among women in Syria: Cross-sectional study

Background: Ovarian cancer is the second most prevalent malignancy in women over 40, especially in low-income nations. For every 100,000 women in Syria, 473 new cases of ovarian cancer are diagnosed. This study aims to investigate the knowledge of ovarian cancer symptoms among Syrian women and determine the factors associated with good knowledge. Methods: An online cross-sectional was performed between July 29 and August 17, 2022. The inquired participants in the study were Syrian females above 18 years. The questionnaire consists of 41 questions organized into three sections: sociodemographic information, Confidence in recognizing ovarian cancer symptoms, and women's Awareness of the symptoms of ovarian cancer. Results: This research included 557 Syrian women, and the average age was 23. Only 20.5% of involved women demonstrated a good knowledge of the symptoms of ovarian cancer. The participants who agreed that abdominal pain and pelvic pain are ovarian cancer symptoms formed (36.8%), and (63.9%), respectively.Regarding the additional presenting symptoms of ovarian cancer, “extreme generalized fatigue” was the most often reported symptom (66.1%). Divorced women showed greater knowledge scores than other marital status groups (7.13 ± 3.31, P-value<0.05), while public sector participants scored higher than other occupational groups (6.38 ± 2.5, P-value<0.05). Conclusion: Our findings indicate that Syrian females have inadequate knowledge regarding ovarian cancer symptoms. More ovarian cancer awareness programs for Syrian women of all ages are needed to increase the early identification of this illness

Experimental and Theoretical Investigations of <i>Argania spinosa</i>’s Extracts on the Antioxidant Activity and Mild Steel Corrosion’s Inhibition in 1 M HCl

The aim of the present research is the evaluation of the extraction process effect on the chemical composition, the antioxidant activities, and the mild steel corrosion inhibition ability of Argania spinosa’s extracts (alimentary oil (AO) and hexanic extract of roasted almonds (HERA)). The chemical composition revealed that both extracts have the same major compounds: Palmitic, linoleic, and stearic acids, with their order slightly different. Electrochemical impedance spectroscopy (EIS), weight loss measurements, and polarization curves were used to estimate AO and HERA’s mild steel corrosion’s inhibition capacity. Based on these three methods, AO registered, respectively, 81%, 87%, and 87% inhibition efficiency while HERA registered 78%, 84%, and 82% inhibition efficiency. The antioxidant activity of AO and HERA was examined in parallel with standard antioxidants (gallic acid and quercetin) using two assays: DPPH* scavenging assay and ferric reducing antioxidant power assay (FRAP). AO had less EC50 in both techniques (DPPH*: 3559.08 ± 161.75 μg/mL; FRAP 1288.58 ± 169.21 μg/mL) than HERA (DPPH*: 3621.43 ± 316.05 μg/mL; FRAP 1655.86 ± 240.18 μg/mL). Quantum chemical and molecular dynamic studies were employed to suggest the adsorption mechanism

Experimental and Theoretical Investigations of Argania spinosa&rsquo;s Extracts on the Antioxidant Activity and Mild Steel Corrosion&rsquo;s Inhibition in 1 M HCl

The aim of the present research is the evaluation of the extraction process effect on the chemical composition, the antioxidant activities, and the mild steel corrosion inhibition ability of Argania spinosa&rsquo;s extracts (alimentary oil (AO) and hexanic extract of roasted almonds (HERA)). The chemical composition revealed that both extracts have the same major compounds: Palmitic, linoleic, and stearic acids, with their order slightly different. Electrochemical impedance spectroscopy (EIS), weight loss measurements, and polarization curves were used to estimate AO and HERA&rsquo;s mild steel corrosion&rsquo;s inhibition capacity. Based on these three methods, AO registered, respectively, 81%, 87%, and 87% inhibition efficiency while HERA registered 78%, 84%, and 82% inhibition efficiency. The antioxidant activity of AO and HERA was examined in parallel with standard antioxidants (gallic acid and quercetin) using two assays: DPPH* scavenging assay and ferric reducing antioxidant power assay (FRAP). AO had less EC50 in both techniques (DPPH*: 3559.08 &plusmn; 161.75 &mu;g/mL; FRAP 1288.58 &plusmn; 169.21 &mu;g/mL) than HERA (DPPH*: 3621.43 &plusmn; 316.05 &mu;g/mL; FRAP 1655.86 &plusmn; 240.18 &mu;g/mL). Quantum chemical and molecular dynamic studies were employed to suggest the adsorption mechanism