Publications by authors named "A Marconi"
Article Synopsis
- The study discusses two rare cases of postmenopausal women experiencing rapid virilization and high testosterone levels, despite negative imaging results for ovarian masses.
- Both patients underwent hormone profiling and inconclusive imaging, leading to a suspicion of ovarian tumors, prompting surgical intervention through laparoscopic oophorectomy.
- Histological examination after surgery confirmed Leydig cell tumors in one patient and thecoma in the other, with testosterone levels normalizing and symptoms improving post-surgery, emphasizing the need for thorough evaluation of androgen excess in postmenopausal women.
Article Synopsis
- The neural crest (NC) is a unique group of embryonic cells in vertebrates that contribute to key features like craniofacial structures and pigmentation, yet its role in species diversity is not well-understood.
- This study focused on the diverse cichlid species from the African Great Lakes, using advanced genetic analyses to explore how the NC's genetic program evolved alongside their physical differences.
- Findings highlighted significant variations in gene expression related to NC development, particularly in the sox10 gene family, with experiments showing that these genes have distinct roles that influence morphological traits across different cichlid species.
Introduction: The COVID-19 pandemic has had significant impacts on society, particularly on children and adolescents, who have faced serious social, educational, and health consequences due to the loss of their primary caregivers.
Materials And Methods: Female fertility rates were analyzed, and estimates of male fertility were made to calculate the number of children under 18 years old by age group. Demographic and mortality information from COVID-19 infection was used to calculate the resulting orphanhood in Argentina during the period 2020-2021, considering the loss of one or both parents or the main caregiver grandparent.
State-of-the-art 19th century spectroscopy led to the discovery of quantum mechanics, and 20th century spectroscopy led to the confirmation of quantum electrodynamics. State-of-the-art 21st century astrophysical spectrographs, especially ANDES at ESO's ELT, have another opportunity to play a key role in the search for, and characterization of, the new physics which is known to be out there, waiting to be discovered. We rely on detailed simulations and forecast techniques to discuss four important examples of this point: big bang nucleosynthesis, the evolution of the cosmic microwave background temperature, tests of the universality of physical laws, and a real-time model-independent mapping of the expansion history of the universe (also known as the redshift drift).
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- * Performic acid (PFA) is shown to be a powerful disinfectant with minimal environmental impact, but its effects on entire microbial communities, especially resistant strains, are still not fully understood.
- * This study found that PFA significantly reduces microbial viability and alters bacterial composition at low concentrations and short contact times, highlighting its potential for widespread use in wastewater treatment facilities.