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Rolando fracture is one of the most difficult fractures facing hand surgeons. It can be described as a Y- or T-shaped fracture line that runs longitudinally through the metaphyseal area, with an intra-articular fracture splitting the metacarpal base fragment into a volar and a dorsal fragment. In this study, we introduce our technique used in the management of 7 cases, which were treated by our dynamic external fixation. The results were found to be promising, with an excellent range of motion and power grip postoperative. The joints spaces were restored. No patients in our series developed arthritic changes. All patients are pain free in 3 months.

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Recently, Egypt has been undergoing rapid development in the urban and transportation sectors with a focus on the New Administrative Capital. This requires temporal monitoring and assessment for such projects with low cost, high accuracy, and simple application. Therefore, sentinel-2 data was utilized to assess the effectiveness of several methods for urban classification and monitoring. The study discusses three main approaches: histogram threshold, spectral indices, and machine learning techniques. In machine learning, we focus on K-nearest neighbor (KNN), Linear discrimination analysis (LDA), and Random Forest (RF) due to their robustness and simplicity. It was found that the RF technique presents the highest accuracy for our study region with 98.8%. Moreover, this study monitored the effect of such development on air pollution in the New Administrative Capital using sentinel-5P data which showed an increase in the CO and NO2 levels during the last five years by nearly 11% and 75% respectively, with a noticeable drop during the year 2020 due to the Covid19 lockdown. The classification model was trained and verified using ground truth data obtained on the 10 th of Ramadan City. Then, it was applied to monitoring urban development and the associated environmental impact in the New Administrative Capital in Egypt.

The present work was carried out on some new sesame seeds varieties namely: Toshaka 1, Shandaweel 3 and Giza 32 in an attempt to evaluate the utilization of sesame oil as a source of natural antioxidants. Antioxidative effect of isolated natural antioxidants on the oxidative stability of sunflower oil during heating up to 18 hours was evaluated. The acid value of sunflower oil was increased during heating up to 9 hours and then decreased. The oil samples treated with antioxidants had the least amount of free fatty acids, after heating up to 9 hours, which is due to a very low degree of hydrolysis in oil as affected by addition of antioxidants. As heating time was increased, peroxide values increased up to 9 hours, and then decreased. The peroxide values were also less in sunflower oil treated with antioxidants, which was an indication that antioxidants decreased the oxidation of sunflower oil.The addition of antioxidants to sunflower oil was very effective since the TBA values after 18 hours of heating were significantly less than the values of the oil without adding antioxidants.Conjugated diene and triene formation in oil samples increased with heating time up to 18 hours. Blending of sunflower oil with antioxidants, resulted in a significant decrease in conjugated diene and triene values, compared with control samples. In general it could be concluded that sunflower oil containing natural antioxidants had a much greater oxidative stability than oils without adding antioxidants. Addition of natural antioxidants could increase shelf life of oils. In addition, natural antioxidants are safe and impart health benefits to the consumer.