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Yeast recycling, which is a common practice in sugarcane ethanol plants, could be expanded if it could be successfully implemented in corn-based ethanol production. However, the process of recycling the yeast remaining after fermentation is hampered by contaminating microorganisms that reduce the fermentation efficiency and compete with the yeast for the fermentable sugars. Currently, antibiotics are used to control microbial contamination. This study proposes chlorine dioxide and electron beam irradiation as alternative control methods for completely inactivating contaminants and minimizing their effect on recycled yeast. For that, wort sterilization using electron radiation (20 kGy) and treatment with a chemical biocide, namely chlorine dioxide (125 mg kg−1), were compared with non-treated wort. Five fermentation cycles were performed using fed-batch systems with 300 g L−1 of fermentable sugars. The results obtained in this study showed the inactivation of contaminants under the effect of electron beam irradiation, which led to an increase in the productivity, yield, and efficiency of fermentation by 0.21 g L−1h−1, 2.6%, and 4.7%, respectively. However, ClO2 did not show promising results in reducing contamination or improving fermentative parameters. Thus, electron beam irradiation of contaminated wort may be a suitable alternative to chemical biocides and would allow the use of recycled yeast in corn-based ethanol plants.

Corn and sugarcane are the primary feedstocks for ethanol production, but microbial contamination hinders yeast fermentation efficiency. Current control methods include antibiotics and sulfuric acid, but they have limitations, resulting in dependence on external inputs and the risk of antibiotic-resistant bacteria. This review examines electron beam technology as an industrial-scale disinfection solution for both corn- and sugarcane-based ethanol production, highlighting its advantages, limitations and opportunities for adoption in Brazil. A critical evaluation highlights the importance of optimal operating conditions for scalability, cost effectiveness and sustainable implementation. Through a practical example, we demonstrate the effectiveness of electron beam treatment in improving fermentation efficiency and reducing contamination-related losses. Notably, the ionizing radiation from this process does not affect wort sugar content or generate radioactive residues. While acknowledging the potentially high energy input requirements, cogeneration in sugarcane mills can address this, making it a viable option; however, further technical and economic evaluation should be made. In addition, electron beam technology is a promising approach for the production of high-value products such as neutral alcohol, amino acids, animal feed and pharmaceuticals. Therefore, this comprehensive review provides valuable insights for researchers, industry stakeholders and policymakers to promote sustainable and efficient ethanol production practices.

Objective: To evaluate the impact of counseling and preoperative education on reducing anxiety in patients undergoing surgery for gynecologic cancer., Methods: In this randomized clinical trial, patients with gynecological tumors undergoing surgical treatment between 15 and 60 days preoperatively, were included. The group was randomized to receive preoperative routine orientation plus preoperative counseling and education by nursing (experimental group [EG]) or receive preoperative routine orientation only (control group [CG]). We stratified the groups by surgical approach: open, laparoscopy, and robotic. We excluded patients treated in another service and with the need for an intensive care unit after surgery. We used the Hospital Anxiety and Depression Scale (HADS) to evaluate symptoms of anxiety and depression. The severity of symptoms was evaluated using the Edmonton Symptom Assessment System (ESAS-Br)., Results: We analyzed 54 women (CG 27, EG 27). No significant differences were observed regarding ESAS scores (total, physical, emotional, well-being, and anxiety) between preoperative and postoperative evaluation. However, in the EG, comparing the preoperative versus postoperative moments, there was a significant reduction in total, emotional, and anxiety scores of ESAS (p = 0.012; p = 0.003; p = 0.001). No difference in anxiety symptoms by HADS scale was noted between the two groups, comparing preoperative and postoperative moments, CG (40.7% and 22.2%) and EG (37.0% and 25.9%) (p = 0.78; p = 0.75), respectively. Also, in depression symptoms (HADS scale), we found no difference comparing preoperative and postoperative moments (p = 0.34; p > 0.99). When we stratified by surgical approach or time between intervention and surgery ( ≤ 15, > 15 to ≤ 30, and > 30 days), no difference was observed in the anxiety and depression symptoms evaluation, in both groups., Conclusions: The preoperative education by nurse orientation reduced the total, emotional, and anxiety symptoms of ESAS score between preoperative and postoperative moments. However, by the HADS scale, there was no difference in anxiety and depression symptoms., (© 2024 Wiley Periodicals LLC.)

Objective: Three gynecologic oncology clinics located in the USA, Brazil, and Mexico collaborated to evaluate their delivery of hereditary cancer genetics services. This descriptive retrospective review study aimed to establish baseline rates and timeliness of guideline-recommended genetics service delivery to patients with ovarian, fallopian tube, primary peritoneal (ovarian), and endometrial cancers at each clinic., Methods: Patients who were newly diagnosed with ovarian and endometrial cancers between September 1, 2018 and December 31, 2020 were identified from the medical records of the clinics. Genetics service delivery metrics included the rates of mismatch repair deficiency tumor testing for patients with endometrial cancer (microsatellite instability/immunohistochemistry, MSI/IHC), referral to genetics services for patients with ovarian cancer, completed genetics consultations, and germline genetic testing for patients with ovarian and endometrial cancers. Timeliness was calculated as the average number of days between diagnosis and the relevant delivery metric. Descriptive statistics were used to analyze data., Results: In total, 1195 patients (596 with ovarian cancer, 599 with endometrial cancer) were included in the analysis, and rates of genetics service delivery varied by clinic. For patients with ovarian cancer, referral rates ranged by clinic from 32.6% to 89.5%; 30.4-65.1% of patients completed genetics consultation and 32.6-68.7% completed genetic testing. The timeliness to genetic testing for patients with ovarian cancer ranged by clinic from 107 to 595 days. A smaller proportion of patients with endometrial cancer completed MSI/IHC testing (10.0-69.2%), with the average time to MSI/IHC ranging from 15 to 282 days. Rates of genetics consultation among patients with endometrial cancer ranged by clinic from 10.8% to 26.0% and 12.5-16.6% completed genetic testing., Conclusions: All clinics successfully established baseline rates and timeliness of delivering hereditary cancer genetics services to patients with ovarian and endometrial cancers. Lower rates of delivering genetics services to patients with endometrial cancer warrant additional research and quality improvement efforts., Competing Interests: Competing interests: The following authors declare no potential conflict of interest: EMB, KAP, KHL, APSDDS, GO, CeEMdCA, LG, JR-C, DC-d-L. JAR-H reports consulting fees from Guidepoint Consulting and Schlesinger Group., (© IGCS and ESGO 2024. No commercial re-use. See rights and permissions. Published by BMJ.)