Isoprene, 1,2-butadiene, and their isomers play an important role in aerosols in the atmosphere, interstellar media, and extraterrestrial life. Since electrons are everywhere, studying how electrons interact with these molecules is an important part of studying such environments. To date, however, little investigation has been conducted in this area. Bearing this in mind, we conducted a thorough investigation to report the various electron scattering cross sections of isoprene, 1,2-butadiene, and their isomers. The methods used for this purpose are reliable within the limits of adopted model potentials. The optical potential method was used to get the total elastic and inelastic cross sections, while the complex scattering potential ionization contribution method was used to get the total ionization cross section from the inelastic contribution. The results from these approximations are pretty close to the results from earlier experiments and theories. Furthermore, most of these isomers are being explored for the first time. Besides, their isomeric effect is also discussed. A correlation between the cross sections of molecules is demonstrated, which can be used to predict cross sections of those molecules where previous data are not available.
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http://dx.doi.org/10.1021/acs.jpca.3c01756 | DOI Listing |
Ann Surg Oncol
January 2025
Department of Hepatobiliary and Digestive Surgery, Pontchaillou University Hospital, Rennes, France.
Background: Hepatocellular carcinoma (HCC) associated with major vasculature tumor extension is considered an advanced stage of disease to which palliative radiotherapy or chemotherapy is proposed. Surgical resection associated with chemotherapy or chemoembolization could be an opportunity to improve overall survival and recurrence-free survival in selected cases in a high-volume hepatobiliary center. Moreover, it has been 25 years since Couinaud described the entity of a posterior liver located behind an axial plane crossing the portal bifurcation.
View Article and Find Full Text PDFSci Data
January 2025
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
As the occurrence of human diseases and conditions increase, questions continue to arise about their linkages to chemical exposure, especially for per-and polyfluoroalkyl substances (PFAS). Currently, many chemicals of concern have limited experimental information available for their use in analytical assessments. Here, we aim to increase this knowledge by providing the scientific community with multidimensional characteristics for 175 PFAS and their resulting 281 ion types.
View Article and Find Full Text PDFObjective: A study conducted in Rio de Janeiro aimed to identify the factors contributing to the high rate of cesarean deliveries in the city, which is over three times higher than the World Health Organization recommended. However, the city has a role in strategies and policies to empower primary care and to organize delivery care.
Methods: We conducted a cross-sectional study using the Live Birth Information System from 2012 to 2021.
Food Chem
January 2025
College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China. Electronic address:
The shelf-life of grapes is reduced due to infection by various pathogens and mechanical damage, which consequently limits their availability on the market and results huge economic losses. Active packaging films are expected to overcome this problem. In this study, packaging films (CMC-Gly-PMA) were developed using wheat straw-based carboxymethyl cellulose (2 %), glycerol (30 % w/w of CMC) and polymalate (0.
View Article and Find Full Text PDFPoult Sci
January 2025
Department of Microbiology, Faculty of Basic Sciences, East Tehran Branch, Islamic Azad University, Tehran, Iran.
A major health and financial burden in the chicken sector is salmonella infection. It is difficult to create an oral vaccination that can provide strong intestinal mucosal immunity in birds, particularly cross-protection against several Salmonella serotypes. As a result, the poultry industry needs a powerful oral vaccination platform that uses live bacterial vectors to prevent various Salmonella serotypes.
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