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    Drought stress imposed at different reproductive stages influences growth, yield and seed composition of soybean
    (University of the Philippines at Los Banos, 2008) Kirnak H.; Dogan E.; Alpaslan M.; Celik S.; Boydak E.; Copur O.
    Soybean (Glycine max L.) was grown in 2003 and 2004 to determine the effect of deficit irrigation given at five different reproductive stages on its growth, yield and seed composition. All soybean plots received full irrigation during the vegetative stage, while treatments were started during one of the reproductive stages (R1-2, beginning of flowering and full bloom; R3, beginning of pod; R4, full pod; R5, beginning of seed; R6, full seed and full irrigation) by completely stopping irrigation. In 2003 and 2004, the observed leaf area index ranged from 3.9 (R6) to 2.6 (control), and from 4.0 (R6) to 2.7 (control), respectively. Water stress resulted in reduced vegetative growth, leaf relative water content and leaf chlorophyll content. In 2003 and 2004 seed yields ranged from 1955 (R6) to 3684 kg ha1 (control), and from 1867 (R6)to 3952 kg ha-1 (control), respectively. Any water stress imposed on soybean plants in R3, R5 and R6 resulted in substantial yield reduction compared with the full irrigated control treatment. There were no significant effects of total chlorophyll and leaf relative water content on the oil and protein content of soybean seed. Water stress during the different reproductive stages (R 1-R6) significantly affected protein content, C18:0, C18:2 and C18:3 fatty acids. The lowest protein value was obtained in R 1-2, while the highest values were obtained from R4 in both years. Water stress effect imposed on any of the reproductive stages showed a significant effect on protein content but not seed oil. The highest protein content values were obtained from R4 treatment at 42.5% and 42.1 % in 2003 and 2004, respectively, while the lowest values were from R5 and R1-2 at 37.9% and 38.9% in 2003 and 2004, respectively. Average seed oil content in 2003 and 2004 were 14.61% and 16.12%, respectively.
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    Long-Term Results of Sodium 2-Mercaptoethane Sulfonate Usage on Cholesteatoma Surgery
    (AVES, 2024) Celik S.; Yalcın M.Z.; Kılıc O.; Tan M.; Kalcioglu M.T.
    BACKGROUND: Although advanced technologies and surgical procedures are used, cholesteatoma is a disease with the possibility of recurrence. The aim of this study was to determine the long-term effect of sodium 2-mercaptoethane sulfonate (MESNA) on cholesteatoma surgery. METHODS: Patients who underwent cholesteatoma surgery between January 2009 and July 2014 by the same surgeon were divided into 2 groups: those where MESNA was used and those where it was not. Otomicroscopic examinations were performed to see the presence of cholesteatoma recurrence in the patients who had surgery at least 8 years ago. Pure-tone audiometry was performed to evaluate the hearing results. RESULTS: Sodium 2-mercaptoethane sulfonate was used in 23 patients and was not used in 39 patients who came to the control. In the MESNA-used group, cholesteatoma was seen in only 1 of the patients who underwent a canal wall-down (CWD) mastoidectomy. In the MESNA non-used group, cholesteatoma was seen in 3 patients who underwent CWD. The difference was not statistically significant. CONCLUSION: Although there was no statistically significant difference, recurrence of cholesteatoma was seen less frequently in patients who received MESNA during surgery. Studies to be conducted in larger patient series may clarify this issue. © 2024, AVES. All rights reserved.